By Z. Musan. Maine College of Art.
Although digested/fermented bioactive compounds appear as promising chemopreventive agents buy fucidin 10gm low cost, our understanding of the molecular and biochemical pathways behind their mecha nism of action is still limited buy discount fucidin 10 gm online, and further studies are warranted fucidin 10 gm overnight delivery. Sample Cell treatment (Target Cell type (Concentrations Cellular mechanism References compound/s) and time) Gastrointestinal digestion (dialysis) (Polyphenols) Cell growth inhibition Caco-2 85 to 220 ( M Viability decrease Bermdez-Soto et al generic fucidin 10gm amex. Blackberry (300 M- 24 h) induced oxidative stress (neuroblast polyphenols (2012a) (Rubus sp. Mechanisms involved in the chemopreventive effect of in vitro digested foods or bioactive constituents in cell lines. The in vitro simulation of the conditions of gastrointestinal digestion represents an alterna tive to in vivo studies for evaluating the bioavailability and/or functionality of bioactive com ponents of foods. In vitro studies do not replace in vivo studies; rather, both complement 140 Oxidative Stress and Chronic Degenerative Diseases - A Role for Antioxidants each other. Thus, caution is mandatory when attempting to extrapolate observations obtained in vitro in cell line studies to humans. Cell cycle arrest at S phase with/without (human (~50 M total (2010) No apoptosis and resumption of cell cycle iron and/or colon polyphenols)  after digest removal (cytostatic effect) milk carcinoma) 24 h Fruit juices Caco-2 4% (v/v) in Frontela-Saseta et al. Mechanisms involved in the chemopreventive effect of in vitro colonic fermented (in batch) of foods or bioactive constituents in cell lines. Mechanisms involved in the chemopreventive effect of in vitro digested (dialysis) plus colonic fermented (batch) foods or bioactive constituents in cell lines. Author details Antonio Cilla, Amparo Alegra, Reyes Barber and Mara Jess Lagarda* *Address all correspondence to: antonio. Unique dietary patterns and chronic disease risk profiles of adult men: The Framinghan nutrition studies. The protective effect of the Mediterranean diet: focus on can cer and cardiovascular risk. Free radicals and antioxidants in normal physiological functions and human disease. Nutrients and phytochemicals: from bioavailabili ty to bioefficacy beyond antioxidants. Cancer chemoprevention and chemotherapy: dietary polyphenols and signaling pathways. In vitro bioacces sibility assessment as a prediction tool of nutritional efficiency. Health benefits of fruit and vegetables are from additive and syner gistic combinations of phytochemicals. Mechanisms of combined action of different chemopreventive dietary compounds: a review. A physiological approach for preparing and conducting in testinal bioavailbility studies using experimental systems. Stability of polyphenols in chokeberry (Aronia melanocarpa) subjected to in vitro gastric and pancreatic digestion. Models for intestinal fermentation: associ ation between food components, delivery sustems, bioavailability and functional in teractions in the gut. Estimation of the fermentability of dietary fibre in vitro: a European interlaboratory study. Development of a 5-step multi- chamber reactor as a simulation of the human intestinal microbial ecosystem. A multi com partmental dynamic computer-controlled model simulating the stomach and small intestine. Entero cyte-like differentiation and polarization of the human colon carcinoma cell line Ca co-2 in culture. Availability of polyphenols in fruit beverages subjected to in vitro gastrointes tinal digestin and their effects on proliferation, cell-cycle and apoptosis in human colon cancer Caco-2 cells. Fermented wheat aleurone induces enzymes involved in detoxification of carcionogens and in antioxidative de fence in human colon cells. Cellular antioxidant activity of Feijoada whole meal coupled with an in vitro digestion. Health promotion by flavonoids, toco pherols, tocotrienols, and other phenols: direct or indirect effects? Supplementation of test meals with fat-free phytosterol products can reduce cholesterol micellarization during simulated digestion and cho lesterol accumulation by Caco-2 cells. Polyphenolic profile and antipro liferative activity of bioaccessible fractions of zinc-fortified fruit beverages in human colon cancer cell lines. Evaluation of antioxidant activity and antiproliferative effect of fruit juices enriched with Pycnoge nol in colon carcinoma cells. The growth-inhibitory effects of tomatoes digested in vitro in colon adenocarcinoma cells occur through down regulation of cyclin D1, Bcl-2 and Bcl-xL. Antioxidant effect derived from bioaccessible fractions of fruit beverages against H2O2-induced oxida tive stress in Caco-2 cells. Antioxidant effect of casein phosphopeptides compared with fruit beverages supplemented with skimmed milk against H202-induced oxidative stress in Caco-2 cells. Bioactivity of ellagic acis-, lutein- or sesamol-enriched meat patties assessed using an in vitro digestion in Caco-2 cell model system. Mineral and/or milk sup plementation of fruit beverages helps in the prevention of H202-induced oxidative stress in Caco-2 cells. Caseinophosphopep tides exert partial and site-specific cytoprotection against H202-induced oxidative stress in Caco-2 cells. Tryptophan from human milk induces oxidative stress and upregulates Nrf-2-mediated stress re sponse in human intestinal cell lines. Antioxidative and angiotensin-I-converting enzyme inhibitory potential of Pacific hake (Merluccius productus) fish protein hydrolysate subjected to simulated gastrointestinal digestion and Caco-2 cell permeation. Antioxidant properties of breast milk in a novel in vitro digestion/enterocyte model. Colon-available raspberry polyphenols exhibit anti-cancer effects on in vitro models of colon cancer. Identification of hen egg yolk-de rived phosvition phosphopeptides and their effects on gene expression profiling against oxidative-stress induced Caco-2 cells. An investigation of the relationship between the anti-inflammatory activity, polyphenolic content, and anti oxidant activities of cooked and in vitro digested culinary herbs. Butyrate is only one of several growth inhibitors produced during gut flora-mediated fermentation of diet ary fibre sources. Both wheat (Triticum aestivum) bran arabinoxylans and gut flora-mediated fermentation products protect human colon cells from genotoxic activities of 4-hy droxynonenal and hydrogen peroxide. Fermentation products of inulin-type fructans reduce proliferation and induce apoptosis in human colon tu mour cells of different stages of carcinogenesis. Chemopreventive effects of in vitro digested and fer mented bread in human colon cells. Fermentation of resistant starches: influence of in vitro models on colon carcinogenesis. Epidemiology of chronic degenerative diseases in Mexico and the world During the last 30 years relevant changes in the public health field have arisen worldwide, among which the most representative are observed in developed countries where a big deal of infectious diseases have been reduced and controlled as a result of the creation and intro duction of powerful antibiotics . Those re ductions have been the result of social changes and of the improvement of preventive methods of infectious diseases. However, in recent years the prevalence of chronic degen erative diseases has increased . Mexico does not escape this situation as a result of specific factors to our country such as economic development, concentration of population in urban areas, lack of support to im prove the health services and the limitations in preventive programs, particularly in the population under 10 years. Besides, there is a transformation of the population pyramid due to a reduction in mortality and a decrease in birth rate; both phenomena are identi fied as epidemiologic and demographic transitions . Although in those reports not all the existing cases are included (not all patients request healthcare services), they are a good help to understand the dam age behavior along with other indicators of prevalence that estimate the number of cases in the population within a specific period of time. Such indicators are obtained from the national healthcare survey and from the national healthcare and nutrition survey 2006 . On the other hand, the mortality statistics are considered as more reliable due to the per manent job in updating the database.
This difference makes it difficult to attribute the differences seen in the two arms at follow-up to effect of either intervention discount fucidin 10 gm without a prescription. Support for this hypothesis is that the Lequesne Index was equal in both groups at baseline and this measure was not different in the two groups at 8 weeks of follow-up buy generic fucidin 10 gm online. Finally buy 10gm fucidin amex, the study was also essentially unblinded order 10 gm fucidin overnight delivery, which may also have led to between-group biases. Nevertheless, the results are of considerable interest and underscore a need for further research into potential benefits from more extreme weight-reduction interventions. Such micronutrients include vitamins C and D and possibly vitamins E and K, and selenium. Of all the supplements of interest, glucosamine and chondroitin have been the most frequently studied. However, the question of efficacy of these treatments with respect to symptomatic improvement and structural progression still remains. Additional nonindustry-sponsored clinical trials evaluating the efficacy of these treatments are underway. The state of dietary suplements even slight increases in growth are better than no growth at all. Release of oxygen radicals by articular chondro- cytes: A study of luminol-dependent chemoluminescence and hydrogen peroxide secretion. Free radicals and inflammation: protection of synovial fluid by superoxide dismutase. Detection of nitrotyrosine in aging and osteoarthritic cartilage: Correlation of oxidative damage with the presence of interleukin-1beta and with chondrocyte resistance to insulin-like growth factor 1. Potential involvement of oxidative stress in cartilage senescence and development of osteoarthritis: oxidative stress induces chondrocyte telomere instability and downregulation of chondrocyte function. Antioxidant activity of synovial fluid, hyaluronic acid, and two subcomponents of hyaluronic acid. Effect of ascorbic acid on arylsulfatase activities and sulfated proteoglycan metabolism in chondrocyte cultures. Osteoarthritis-like changes in the murine knee joint resulting from intra-articular transforming growth factor-beta injections. Examination of subchondral bone architecture in experimental osteoarthritis by microscopic computed axial tomog- raphy. Morphological alterations of the subchondral bone in advanced degenerative arthritis. A longitudinal study of subchondral plate and trabecular bone in cruciate-deficient dogs with osteoarthritis followed up for 54 months. The effect of marginal osteophytes on reduction of varus- valgus instability in osteoarthritic knees. Bone mineral density and risk of incident and progressive radiographic knee osteoarthritis in women: the Framingham Study. Prediction of the progression of joint space narrowing in osteoarthritis of the knee by bone scintigraphy. Expression of vitamin D receptors and matrix metalloproteinases in osteoarthritic cartilage and human articular chondrocytes in vitro. In situ detection of 1,25-dihydroxyvitamin D3 receptor in human skeletal muscle tissue. The relationship of bone density and fracture to incident and progressive radiographic osteoarthritis of the knee: the Chingford Study. Positive association between serum 25- hydroxyvitamin D level and bone density in osteoarthritis. Relation of dietary intake and serum levels of vitamin D to progression of osteoarthritis of the knee among participants in the Framingham Study. Serum vitamin D levels and incident changes of radiographic hip osteoarthritis: a longitudinal study. Low levels of vitamin D and worsening of knee osteoarthritis: Results of two longitudinal studies. Effect of 25-hydroxyvitamin D and parathyroid hormone on progression of radiographic knee osteoarthritis. The relationship of antiresorptive drug use to structural findings and symptoms of knee osteoarthritis. Does vitamin D supplementation contribute to the modulation of osteoarthritis by bisphosphonates? Evidence linking chondrocyte lipid peroxidation to cartilage matrix protein degradation. Effect of vitamins C and E on sulfated proteoglycan metabolism and sulfatase and phosphatase activities in organ cultures of human cartilage. Aggrecan degradation in chondrocytes is mediated by reactive oxygen species and protected by antioxidants. Osteoarthrosis induced by intra-articular hydrogen peroxide injection and running load. Etude clinique experimentale de l alpha-tocopheryle-quinone en rheumatologie et en reeducation. Vitamin E is ineffective for symptomatic relief of knee osteoarthritis: a six month double blind, randomised, placebo controlled study. Supplementary vitamin E does not affect the loss of cartilage volume in knee osteoarthritis: a 2 year double blind randomized placebo controlled study. Cartilage Volume Must be Normalized to Bone Surface Area in Order to Provide Satisfactory Construct Validity: The Framingham Study. Design and conduct of clinical trials in patients with osteoarthritis: recommendations from a task force of the Osteoarthritis Research Society. From nutraceuticals to functional foods: a systematic review of the scientific evidence. Intake and sources of phylloquinone (vitamin K1): variation with socio-demographic and lifestyle factors in a national sample of British elderly people. Human chondrocyte expression of growth-arrest-specific gene 6 and the tyrosine kinase receptor axl: potential role in autocrine signaling in cartilage. Interleukin 6 production by lipopolysaccharide-stimulated human fibroblasts is potently inhibited by naphthoquinone (vitamin K) compounds. Kashin-Beck disease expanding the spectrum of iodine-deficiency disorders [editorial; comment]. Kashin-Beck osteoarthropathy in rural Tibet in relation to selenium and iodine status [see comments]. Low Selenium Levels are Associated with Increased Risk for Osteoarthritis of the Knee. The bioavailability and pharmacokinetics of glucosamine hydrochloride and low molecular weight chondroitin sulfate after single and multiple doses to beagle dogs. Human serum glucosamine and sulfate levels after ingestion of glucosamine sulfate. Oral bioavailability and dose- proportionality of crystalline glucosamine sulfate in man. Glucosamine induces rapid desensitization of glucose transport in isolated adipocytes by increasing GlcN-6-P levels. Effect of glucosamine supplementation on fasting and non-fasting plasma glucose and serum insulin concentrations in healthy individuals. Interaction of the antitrypsin and elastase-like enzyme of the human granulocyte with glycosaminoglycans. Effet du traitement par le sulfate de galactosaminoglucuronoglycane sur l estase granulocytaire synovial de patients atteints d osteoarthrose. The multiple-dose pharmacokinetics of orally administered glucosamine and chondroitin sulfate in humans. Glycosaminoglycan production by bovine aortic endothelial cells cultured in sulfate-depleted medium. Effects of sulfate deprivation on the production of chondroitin/dermatan sulfate by cultures of skin fibroblasts from normal and diabetic individuals. Sulphation of proteochondroitin and 4-methylumbelliferyl beta- D-xyloside-chondroitin formed by mouse mastocytoma cells cultured in sulphate-deficient medium. High susceptibility of human articular cartilage glycosaminoglycan synthesis to changes in inorganic sulfate availability.
Signs include mild fever purchase fucidin now, open twice daily to decrease bronchial secretions and to act as mouth breathing 10 gm fucidin visa, and diffusely quiet lungs order fucidin 10gm without a prescription. In addition buy fucidin paypal, some cattle Response to therapy is slow, but survivors gradually im- are so dyspneic that they are unable to take time to prove over 7 to 10 days. The normal defense mechanisms of the lower airway prevent colonization of the lung by P. Chemical damage to mucociliary clearance, such as is caused by ammonia fumes in poorly venti- lated barns, may allow P. Fusobacterium and other anaerobic organ- isms may also be present with chronic suppurative pneumonia in adult cattle. This difference will be impor- acute outbreak, the degree of apparent illness and aus- tant regarding treatment and prevention of P. Usually indicative of consolidation frequently are limited to the the dorsal lung elds are normal. The abnormal area may be be serous or mucopurulent in nature and is more appar- missed unless the stethoscope is pushed under the ent in calves than adult cows. The acute disease may shoulder and the calf or cow forced to take a deep occur in calves and cows of any age but tends to be more common in weaned calves and other grouped animals. All these predisposing factors are common in dairy calves placed in veal operations or other indoor group housing facili- ties. In calves this can be accomplished most easily by help dene the severity of lung involvement. Animals affected with chronic pneumonia or management constitute the integral components of may have marked exacerbation of dyspnea and an in- effective therapy for P. Tilmicosin (a macrolide) and orfenicol owner and nding typical signs complete with anterior are also effective but currently not approved for use in ventral pneumonia and bilateral auscultable rales. Neutrophils predominate the based on previous experience, geographic differences in white blood cell components of the tracheal wash uid, antibiotic sensitivity, and economic factors. Animals that and gram-negative rods may be observed intracellularly are febrile, anorectic, and dyspneic require treatment. The hemogram may show a degenerative Other animals that have mild fever and depression but left shift typical of acute infection in cattle or may be continue to eat and do not act very ill may not require normal in mild cases. Individual or small groups of sick animals may have neutrophilia, and adult cattle may show hyper- be treated empirically if fatalities are not anticipated. However, if an epidemic situation is apparent, it always is Gross pathology of fatal acute cases includes bilateral best to do transtracheal washes from several animals be- anterior ventral pneumonia with the affected portion of fore any treatment. Fibrin may coat the surface of the if the animals fail to respond to the initial choice of anti- parietal or visceral pleura but tends to be less than that biotic, a specic antibiotic may be selected based on the observed with M. Dosages and fre- part of the initial therapy and should not be used there- quency of administration are listed in Table 4-1. This treatment cannot be used in pregnant cows less of the antibiotic selected, all treated cattle should because of the abortifacient qualities of dexametha- have temperature and attitudes recorded daily so that sone. Corticosteroids have potent antipyretic proper- 24- and 48-hour evaluations can be assessed. A trend of ties, and this may lead to a false sense of security decreasing temperature into the normal range should because the veterinarian may assume that the proper proceed at 1 to 2 F per day when an effective antibiotic antibiotic has been used based on a decreasing fever is used; the attitude, appetite, and degree of dyspnea 24 hours following treatment when in fact the antibi- should improve along with the return to normal body otic has not been effective and fever will return 24 to temperature. I do not recommend the use of cortico- cattle to estimate probable efcacies of various antibiot- steroids for bacterial pneumonia. Advantages include block- susceptibility exist and that antibiotic resistance is likely age of some prostaglandin-mediated inammation to increase in years to come. Individual treatment gener- within the lung, antiendotoxin effects, and antipyretic ally is easier for dairy animals than beef animals. Disadvantages include inability to gauge re- otics such as tetracycline, sulfa drugs, and tylosin have sponse to specic antibiotics based on body temperature been added to feed and water to treat large groups alone as a result of the articial decrease in fever caused of calves or heifers. If affected cattle abomasal ulceration or renal damage if treatment is ex- are completely off feed, this method is ineffective. Twenty-four hours meglumine have caused abomasal ulceration when ad- after initial treatment, each group would be evaluated for ministered for a prolonged time to sick cattle. Renal tox- relative degrees of improvement and all sick animals icity also is a risk especially in a dehydrated animal in given the antibiotic that resulted in the most improved which the cytoprotective and vascular effects of prosta- group. The two general groups of drugs include cortico- sion to calves with respiratory distress. If albuterol could be used in cattle, matory and antipyretic activity that often leads to a it might be benecial because this drug has been shown steroid euphoria with resultant improved attitude in other species to act not only as a bronchodilator but and appetite within 24 hours. Parasympatho- have these positive effects and also block several parts lytic bronchodilators have been shown to be more effec- of the inammatory cycle, they are dangerous if used tive in calves than sympathomimetic drugs. Corticosteroids may re- Antihistamines are used as adjunctive therapy in bo- duce some of the chemotactic factors and lysosomal vine bronchopneumonia by many practitioners. These symptomatic ob- rophage activation and antimicrobial peptide expres- servations may be valid, but because histamine has not sion, which are serious detriments to the defense been shown to be one of the major inammatory me- mechanisms of the lower airway. If the veterinarian diators in Pasteurella pneumonia, no scientic evidence elects to use corticosteroids, one treatment of low-dose exists to justify the use of these drugs. A shift in the normal upper airway bac- calves, poor ventilation, crowding, and poor husbandry terial ora or stress activation of latent H. Vasculitis is a predominant feature of is vital to recovery and should be provided even if H. In modern free stall fa- cause disease in the heart muscle and sometimes the cen- cilities, transition cow management practices that add tral nervous system. Affected animals have fever metabolic disease alongside some of the treatments and (103. Bronchopneumonia caused creased milk production proportional to the degree of by P. Dyspnea may be marked in some Although it certainly is recognized that previous viral in- cases, and these cattle will show anxiety and reluctance fection or mixed infections (e. Palpation of the and so forth are indicated); (2) the predisposing manage- intercostal spaces overlying the pneumonic regions may ment or ventilation problems have not been corrected; be painful to the animal. Because the signs usually are identical to Vaccinations are included in the prevention section those of Pasteurella pneumonia, the veterinarian should and are discussed on pages 107-109. With increasing frequency, response to standard broad-spectrum antibacterial ther- H. Acute Signs are indicative of chronic or recurrent infection, the and convalescent serum may be helpful retrospectively hallmark of A. The history usually if the diagnostic laboratory utilized for testing has the indicates illness of at least 1 week s duration or recurrent capability to establish H. There Postmortem specimens will show anteroventral rm may only be one (usually adult cattle) or a few animals areas of pneumonia bilaterally. In adult in the visceral and parietal pleura occupying the areas dairy cattle, it is common for clinical signs to develop of pneumonia. White microabscesses may be ob- may be severe subcutaneous emphysema over the dor- served also. Ampicillin is the drug Although this should be considered in cattle with dorsal of choice for H. Ampicillin is used at 11 to 22 mg/kg twice daily by be found sometimes in apparently healthy cattle follow- injection for 3 to 7 days in most cases. Cephalosporins ing calving and of course in cattle with interstitial pneu- also may be effective. Some cattle maintain nor- monia because these drugs decrease the temperature mal respiratory rates but exhibit the other signs. Chronic articially through antipyretic effects and interfere with suppurative pneumonia should always be considered a interpretation of appropriate antibiotic selection. Auscultation of the Just as in Pasteurella bronchopneumonia, ventilation lungs reveals moist and dry rales in the ventral 25% to or management factors that predispose to altered lower 50% of both lungs in calves and one or both lungs in airway defense mechanisms should be corrected imme- adult cattle, bronchial tones indicative of consolidation diately. The prognosis is fair to good unless severe pneu- in the ventral lung elds, and coarse tracheal rales caused monia and marked dyspnea are present. High environ- mental temperatures, high humidity, and poor ventila- Arcanobacterium pyogenes Chronic Suppurative tion exacerbate the clinical signs. In the lung, it is a secondary invader that usually only establishes infection following suppression of host physical, cellular, or secre- tory defense mechanisms. These factors contribute to tissue necrosis and in- following calving 5 days earlier. The cow had chronic ammatory events that perpetuate the organism s exis- suppurative pneumonia with acute onset of respiratory tence. Fusobacterium and other pathogenic anaerobic signs associated with stress of calving.
Challenges in gaining access to aected patient populations can be mitigated through collaborations with patient advocacy groups and by engagement with clinical trial networks and consortia dedi- cated to improving treatment outcomes among patients aected by the respective rare diseases buy 10gm fucidin fast delivery. Ongoing evolution in the landscape of drug development promises to provide continued opportunity for development of new therapies to treated individuals aected by rare diseases 10 gm fucidin. Several major pharmaceutical compa- nies have established new research divisions dedicated to orphan diseases discount fucidin generic. The scope of gene corrective therapies buy 10 gm fucidin with visa, many uniquely poised to correct underlying genetic causes of rare diseases, continues to expand, creating exciting possibilities for response enrichment strategies in small patient populations. While the challenges are substantial, the climate for clinical research in rare diseases remains promising. The views presented in the chapter reect those of the author and do not necessarily reect those of Pzer. The Committee for Orphan Medicinal Products and the European Medicines Agency Scientic Secretariat, Nat. Bonds and The Investigators of the Multicenter Study of Hydroxyurea in Sickle Cell Anemia, N. View Online The Challenges of Conducting Clinical Trials in Diseases with Small Target Populations 77 33. Kang, View Online The Challenges of Conducting Clinical Trials in Diseases with Small Target Populations 79 E. View Online Treating Rare Diseases: Business Model for Orphan Drug Development 85 Table 4. Each period outlines tremendous growth in output to a peak at the end of the period. In addition, the second and third periods are characterised by a nadir at the beginning, resulting from a fall-o in output from the preceding period s peak due to macro-level market factors, aer which the growth uptick restarts. This paradigm and associated trends, conrmed based on updates with more recent output data, are illustrated in Table 4. Key points to highlight from this three-stage distribution of orphan drug development market output include the importance of market shocks resulting from a fall-o in output from the previous peak (i. Indeed, among therapeutic areas, oncology represents a majority share of new orphan disease therapies that come to market (i. Current estimates indicate that there are 5000 8000 rare diseases in the world for which Orphanet, a European organisation, has done systematic identication and classication. Quite oen, these communities are built on the backbone of formal organisations (i. The degree of community stickiness for many orphan diseases will inuence many of the key factors that underpin overall product development approaches for new orphan drugs. Orphan drugs, with current global revenues of $83 billion, have become an increasingly large and important part of the global pharmaceutical market, for which global sales in 2012 amounted to $645 billion. Second, orphan drug clinical programme strategy and execution is further challenged by uncertainties in the selection and characterisation of appropriate trial end points and treatment durations, paucity of robust biomarkers, recruiting the right patient populations and identifying qualied investigators. Special attention must be paid to ensure that the small patient populations for orphan diseases are characterised appro- priately, given biological and pharmacological heterogeneity/variability, as well as geographical distribution and scarcity. Additionally, for many orphan diseases, the lack of regulatory precedent presents a challenge in itself. The scientic basis, level of evidence required, and context for biomarker use are areas to clarify. Accordingly, regulatory success oen requires robust and frequent inter- actions with regulatory agencies to gain alignment on key programme design elements including trial design, patient population requirements, clinical end points (e. The next few sections will discuss tradi- tional and emerging orphan drug product development platforms. Monoclonal Immunoglobulins: based on Many Iniximab, antibodies specicity for antigenic rituximab epitopes 4. Gene therapy Vector-delivered gene sequences: 1 Alipogene replace decient/aberrant tiparvovec gene products 7. Pharmacological Small molecules: stabilize and/or 0 N/A chaperones reshape misfolded proteins aSmall molecules are low molecular weight (<900 Daltons) organic compounds and have been the main molecule platform for drug development. Large molecules (naturally occurring, recombinant, synthetic) comprise a broad cross-section of compound classes (e. LentiGlobin, which uses a similar vector but replaces beta-globin, is being evaluated for the treatment of beta thalassaemia major and sickle cell disease. There are a number of arguments for the proposed price: high pharmaceutical R&D costs in general, and alipogene tiparvovec s high-cost development programme in particular (i. Interestingly, uniQure has proposed an annuity approach to charging health systems for alipogene tiparvovec (e. Duchenne s, an X-linked disease characterised by progressively debilitating natural history disease stages, has a spectrum of manifesta- tions with important implications for selecting clinical end points and trial design, on a background of a wide array of exon-deletion abnormal- ities. Thelattertwostages,aecting teenagers and older patients, exhibit more debilitating disease aecting cardiac, pulmonary and upper limb function. Prosensa s exon-targeting therapeutic approach, which would create a menu of therapies for each exon-deletion abnormality, is inuenced by the decreasing prevalence of the target exon (e. Based on this background, the clinical development and regulatory approach will probably pursue a full devel- opment programme for compounds addressing the most prevalent target exon mutations (e. Chaperones bring about therapeutic eect downstream of translation by protecting their target proteins (e. Amicus Therapeutics, arguably the company with the broadest portfolio of small molecule pharmacological chaperones, is leveraging its technology platform to develop orally bioavailable therapies to address lysosomal storage disorders including Fabry, Gaucher and Pompe diseases. Creative risk-sharing schemes, in addition to traditional patient access programmes and manufacturer discounts, are increasingly playing an important role in the provision of orphan drugs to patients. This concept is taken further with performance-based risk-sharing agreements for ultra-orphan therapies, where price reductions can be entertained or negoti- ated if clinical outcomes are suboptimal or not compelling, which provides an approach to address the uncertainty regarding the long-term eectiveness of costly ultra-orphan drugs. In summary, the key dimensions of commercialisation success around which companies must dierentiate in order to win in the orphan drug market include understanding and exploiting orphan disease market fundamentals (e. There are two key evaluations or reports that have investigated this topic the Drug Discovery Today article Orphan Drug Development: An Economically Viable Strategy For Biopharma R&D (published in 2012), and EvaluatePharma s Orphan Drug Report (published in 2013). This indicates that mean per-year economic values of the orphan and non-orphan drug cohorts were almost equal, which underscores the value-creation viability of orphan drugs. A separate analysis, in the same report, demonstrated a statistically signicant greater trend for multi-indication orphan drugs to target initial approval in an orphan vs. When the development plans for individual orphan drugs are being created, the cost, complexity, challenges and high-risk nature of pharmaceutical R&D in general should not be underestimated. The current trends in the orphan drug product development arena provide some interesting themes and an inno- vation imperative for inuencing the evolution of the biopharmaceutical landscape for orphan drug R&D specically, as well as continual stimula- tion of biopharmaceutical R&D in general. Orphan drug R&D will make important contributions to life sciences research, drug discovery and translational medicine, thereby enhancing therapeutic development approaches (e. Indeed, orphan drug R&D experiences will help to advance the development and use of personalised/stratied medicine approaches and targeted medicines. Orphan drug R&D also has a key role in evolving clinical development paradigms (e. It will be interesting to see the extent to which real world trials are included as part of ongoing orphan drug development programme eorts to expand clinical data sets and update the risk benet prole of orphan drugs. The real world trial paradigm, gathering ecacy and safety data across countries where feasible, could help encourage greater use of progressive (not only conditional) regulatory approval approaches for orphan drugs, which could help address concerns regarding the paucity of clinical data available at the time of marketing authorisation. View Online Treating Rare Diseases: Business Model for Orphan Drug Development 109 33. View Online Treating Rare Diseases: Business Model for Orphan Drug Development 111 76. Patient support groups, voluntary health organisations and disease advocacy organisations are just a few of the names by which advocacy and support for rare conditions is known. These organisations run the gamut from simple support for people aected by a condition to full-blown research entities that rival some pharmaceutical companies in nancing and capacity. When specically considering drug development for rare diseases, it is more likely that the organisation lies at the research entity end of the spectrum. In determining what phrase to use to describe these entities, it should also be noted that there is a growing distaste in both umbrella bodies comprised of these organisations as well as among the individuals aected by rare conditions for the term patient. Much of the lives of these individuals and their families are spent living with a chronic condition, and not in the care of a physician. The word patient connotes the less than empowering position of being in the doctor patient dyad and not in a position of power and participation. It would perhaps be more precise to say disease research organisations, but that would limit the discussion unnecessarily, because a substantial part of the acceleration of drug development in rare diseases comes from activity other than direct scientic research. Their participation is uneven and fragmented, thus not easily discernable or measured, although there are certainly extraordinary excep- tions.
Glucosamine sulfate use and delay of progression of knee osteoarthritis: a 3-year order fucidin 10 gm without a prescription, randomized buy generic fucidin 10 gm online, placebo-controlled purchase generic fucidin from india, double-blind study trusted 10gm fucidin. In vitro effects of diacerhein and rhein on interleukin 1 and tumor necrosis factor-alpha systems in human osteoarthritic synovium and chondrocytes. Diacerhein and rhein reduce the interleukin 1beta stimulated inducible nitric oxide synthesis level and activity while stimulating cyclooxygenase-2 synthesis in human osteoarthritic chondrocytes. Anti-interleukin-1 effects of diacerein and rhein in human osteoarthritic synovial tissue and cartilage cultures. Effects of three avocado/soybean unsaponifiable mixtures on metalloproteinases, cytokines and prostaglandin E2 production by human articular chondrocytes. Avocado/soya unsaponifi- ables enhance the expression of transforming growth factor beta1 and beta2 in cultured articular chondrocytes. Efficacy and safety of avocado/soybean unsaponifiables in the treatment of symptomatic osteoarthritis of the knee and hip. Structural effect of avocado/soybean unsaponifiables on joint space loss in osteoarthritis of the hip. Pathologic indicators of degradation and inflammation in human osteoarthritic cartilage are abrogated by exposure to n-3 fatty acids. Lipid and cell metabolic changes associated with essential fatty acid enrichment of articular chondrocytes. The association of lipid abnormalities with tissue pathology in human osteoarthritic articular cartilage. Efficacy of cod liver oil as an adjunct to non-steroidal anti- inflammatory drug treatment in the management of osteoarthritis in general practice. Double-blind clinical trial of S-adenosylmethionine versus ibuprofen in the treatment of osteoarthritis. A long-term (two years) clinical trial with S-adenosylmethionine for the treatment of osteoarthritis. Double-blind comparative clinical trial with S-adenosylmethionine and indomethacin in the treatment of osteoarthritis. Double-blind controlled clinical trial of oral S-adenosylmethionine versus piroxicam in knee osteoarthritis. Double-blind multicentre study of the activity of S- adenosylmethionine in hip and knee osteoarthritis. Osteoarthritis as a systemic disorder including stromal cell differentiation and lipid metabolism. Exercise and dietary weight loss in overweight and obese older adults with knee osteoarthritis: the Arthritis, Diet, and Activity Promotion Trial. Change in body fat, but not body weight or metabolic correlates of obesity, is related to symptomatic relief of obese patients with knee osteoarthritis after a weight control program. Musculoskeletal findings in obese subjects before and after weight loss following bariatric surgery. Sule and Michelle Petri Summary There are interesting data on nutritional supplementation in the treatment of systemic lupus erythematous. However, at this time, there is little convincing human data to support dietary modifications or nutritional supplementation. The course can be quite variable, ranging from intermittent exacerbations to severe, life-threatening disease. Females are affected nine times more frequently than men, and disease preva- lence is higher in African Americans, Asians, and Hispanics. However, studies examining the role of dietary modification have shown some promise. These autoantibodies are deposited in the kidneys by 4 to 5 months of age, leading to nephritis and renal disease by 9 to10 months of age (1). Caloric restriction in this murine model has a profound effect on the onset and progression of nephritis and has been shown to improve survival (2). In B/W mice, the life span is increased from 345 days in controls to 494 days in caloric-restricted mice. The calorie restriction (40% less food) also significantly delays the onset of nephritis. By 14 months of age, 0% of the calorie-restricted mice develop nephritis, compared with 100% of the controls (3). However, in order to implement this calorie restriction in humans, 25 to 35% or more of total intake would have to be cut, beginning before adolescence and continuing for life. Low-Protein Diets High protein intakes have been associated with acceleration of kidney damage in both humans and experimental animals (7). In humans, protein restriction has long been a recommended treatment modality in patients with renal failure. Dietary Fat Intake Over the last 20 years, there have been numerous studies of fatty acids and their role in inflammation. Omega-3 (n-3) and omega-6 (n-6) fatty acids are considered essential fatty acids, which means that they are essential to human health but cannot be made in the body and must be obtained from food. Both types of fatty acids play a crucial role in brain function as well as normal growth and development (12,13). The n-3 fatty acids have anti- inflammatory, anti-arrhythmic, and anti-thrombotic properties (14). The n-3 polyunsaturated fatty acids are found in oily fish and vegetable sources such as the seeds of chia, perilla, flax, and walnuts. Fish-oil supplementation also improves survival in female mice and decreases proteinuria. The anti-inflammatory effects of fish oil seem to depend on the synergistic effects of at least two n-3 fatty acids. The 18 g of fish-oil supplement reduced triglycerides by 38%, very low-density lipoprotein cholesterol by 39% and increased high-density lipoprotein cholesterol by 28%. Twenty-six patients with lupus nephritis were given fish oil in a double-blind cross-over trial. Vitamin E Vitamin E, a fat-soluble vitamin, is an antioxidant vitamin involved in the metabolism of all cells. It protects essential fatty acids from oxidation and prevents breakdown of body tissues. A meta-analysis of 135,967 participants in 19 clinical trials identified a dose-dependent relationship between vitamin E and all-cause mortality. Selenium Selenium is a natural antioxidant associated with anti-inflammatory properties. Levels of blood glutathione-peroxidase increase after selenium and vitamin E supplementation. Signs of selenium toxicity include diarrhea, vomiting, hair and nail loss, and lesions of the central nervous system. It acts as a catalytic regulatory ion for enzymes, proteins, and transcription factors. As opposed to other dietary manipulations, zinc restriction was found to be beneficial both early (after weaning) and later in life (at 6 months of age). However, if the zinc deficiency was introduced later in life (at 10 weeks of age), it had little beneficial effect on disease progression (31). These data suggest that there is a critical period in which manipulation of dietary zinc can alter the course of autoimmune disease. In those who were compliant, serum creatinine during flaxseed administration declined from a mean of 0. Reported complications include diarrhea, infertility, and one reported case of death resulting from cardiac shock (35). Dehydroepiandrosterone Autoimmune diseases are more prevalent in women and immune responses may be influenced by sex hormones. Renal histopathology was more severe in iron-supplemented mice than in pair-fed control mice. Immunostaining with anti-IgG and anti-C3 in severely iron-deficient mice (fed 3 mg iron/kg, normal: 35 mg/kg) was more intense. Additionally, the concentration of circulating immune complexes in serum was significantly higher in severely iron- deficient mice, compared with controls (41). This suggests that alterations in serum iron concentration can worsen disease in lupus-prone mice.
Global photographic methods range from a snap- shot with a point-and-shoot camera to highly standardized serial photographs taken with reg- istration equipment purchase 10gm fucidin visa. Any method requires great care to ensure that the only difference between photographic time points is the change (or lack of) in scalp coverage cheap fucidin 10gm. Global photography requires a patient with clean cheap fucidin 10gm without prescription, dry hair and a detail-oriented tech- nician able to take the time to comb and prepare the hair precisely the same way at each ofce visit order fucidin 10gm visa. If possible, the patient should be advised to maintain the same hairstyle and hair color to further control confusing variables. This is especially important in patients with curly hair, since small changes in hair length may have a dramatic effect on the perception of scalp coverage. Oily and/or wet hair increase reection and also cause the hair to clump, revealing more scalp and portraying the patient as having less hair. If the hair is not recorded precisely the same way at follow-up visits, photographs will record exposure of different areas of the scalp making assessment difcult or even impossible. Extraneous information, such as shirt collars and distracting backgrounds, should be eliminated or masked. Backgrounds should be medium color density with blue being the most popular owing to its pleasing contrast to skin tones. Background paper is readily available and can be hung on an open wall in the exam room (behind the door is often a con- venient area). Felt is also a good option since it does not crease or wrinkle as easily as paper. For the vertex view, the hair should be combed out like the spokes of a wheel; for the top scalp view, the hair should be center parted; in the frontal and temporal views, the hair should be pulled back to expose the hairline. The most valuable views for assessing male pattern hair loss are the vertex and top scalp view, and for female pattern hair loss, the top scalp view (5). Additional side and back views may be useful when assessing other hair loss conditions. When photographing patients with alopecia areata, the use of hair clips can help expose the areas of scalp involvement. The most popular cameras in clinical practice are point-and-shoot cameras, which typically have an integrated ash and zoom lens. While this is not an ideal scenario there are several variables that can become xed for your hair photos: Note the location of the point ash on your camera and choose whether to hold the cam- era vertically or horizontally based on the direction you want the ash to rake over the scalp. Or connect the camera to a computer and use software to control all of the camera settings while capturing images directly into a patient s chart. An advantage of using some of the more advanced software is that, at follow-up visits, you can retrieve the patient s baseline image and ghost it over a live preview ensuring that the patient is oriented in the exact same position. To improve the quality of your global photographs consider using a professional lighting system. Using more than one ash and diffusing the light will allow for better visualization of the hair and a more cosmetically appealing image. Even slightly overexposed photos will capture less detail, and ner hairs will not be recorded. Slightly underexposed photos can create the perception of less scalp, and thus more hair. Reproduction ratios can be adjusted from 1:1 to innity simply by rotating the focusing ring on the lens. Good serial photography requires standardization of magnica- tion, which can be accomplished by selecting the reproduction ratio and/or distance setting shown on the macro lens. Medical photographer Bill Slue has written about the three views method, an approach in which the photographer selects from three standardized magnica- tions to photo document any dermatologic case (often using a combination of a close-up and overview photo). Once a suitable reproduction ratio is selected, focusing is accomplished not by the traditional method of rotating the focus ring (or auto focusing), but rather by adjust- ing the distance between the subject and the camera. The key advantage of body focusing over autofocus is that Photographic Imaging of Hair Loss 37 the magnication will be consistent in before-and-after photos. On today s cameras the f-stop of the lens is indicated and controlled from the camera. Using either manual or aperture pri- ority and actually setting the f-stop will allow the maximum depth of eld to be achieved. The global photographs shown were taken by framing the head vertically and using the highest magnication possible while still obtaining a global view. When framing the head for serial photography you need to develop a consistent method for patient positioning. One aid is a stereotactic head device which precisely positions the patient in a head support while the camera is mounted on a rotating arm that can move around the patient s head. Note that stereotactic equipment was developed for the exacting needs of clinical trials and may not be practical for most clinical practices. Having the patient seated on an adjust- able stool on casters will help in aligning the patient. The vertex photo can be taken by having the patient s back to the camera and instructing the patient to look at the ceiling. By adjusting where the patient is looking, you can adjust the angle to maximize the vertex scalp to the camera. While keeping the lens parallel to the oor, one moves toward or away from the patient until focus is achieved and then the picture is taken. The patient is then asked to look at the photographer and, after center parting the hair, asked to tip the head down to look at the oor. An alignment is again obtained and the focusing steps are repeated before the photo is taken. The chin support rotates into a 45-degree position for the temporal hairline view. At follow-up it is very important to have the baseline images viewable either as reference prints or on screen so exact angles can be matched. Macrophotography coupled with computer analysis offers a quantitative method for understanding the dynamics of hair (7 10). Hair count, width, and color can be made with a single visit using a single image. Anagen/telogen ratios (referred to as a phototrichogram) and growth rate can be calculated by having the patient return 1 3 days after the rst photo and measuring the anagen hairs (hairs which have grown). In Cauca- sian patients with light color hair, the application of hair dye on the target site will aid visual- ization (lash and eyebrow dye is preferred). Selecting an appropriate target site is critical when trying to understand the current phys- iological state of the hair loss condition. Most clinical trials have relied on the selection of a representative target site in a transitional area with active thinning. If you are planning on fol- lowing the patient over time, placing a permanent dot tattoo to identify the exact same area at follow-up may be necessary. Recording measurements from the nose and ears may be useful in nding the dot tattoo at follow-up but are not adequate on their own to accurately identify the same area. While clipping of the target area to ~1 mm in length is not necessarily required, it is currently the most common method (clipping to mm may be required if you are capturing anagen/telogen ratios or growth rate 1 3 days later). The bigger the better from a statisti- cal perspective, but your patient might not agree. Currently, most clinical studies have used a 1 cm2 circular area with a dot tattoo placed in the center to allow for relocation of the same target site at follow-up visits. The camera is tethered to the computer, allowing for complete camera control, analysis, and image management. The combination of a coupling uid (clear hair gel works well) and the fact that the hairs in the target site are forced at against the scalp by the contact plate allow for more accurate width and length measurements. There are several software systems available for detecting and analyzing scalp hair (11 13). Considerations include reliability of measurement, types of measurement, ease of use, and ultimately cost. For clinical studies, the system used must also be validated and conform to the requirements of regulatory authorities. Current measurements include hair count and width from a single visit, and anagen/telogen ratios and growth rate if the patient returns two days later. By capturing and storing individual hair length and width measurements, any threshold can be selected and reported.
Permanent colors and high-lift bleaches are biologically aggressive treatments that are well-tolerated by the hair when utilized properly buy generic fucidin 10 gm line. Problems such as hair breakage and straw- like appearance can result from a lack of understanding of how the hair is changed by these processes discount fucidin 10gm on-line. A patient with shoulder-length hair will require treatments once every six to eight weeks order 10 gm fucidin fast delivery. As a result discount 10 gm fucidin with visa, the ends of the bers will have experienced signicantly more chemical and physical insult compared to the roots. Permanent Changes in Hair Shape Two main practices are involved in permanently changing the shape of individual bers, i. While different chemistry is used by these two processes, both have a similar clinical impact on the ber. Permanent waves, generally used to increase curls, are based on alkaline ammonium thyo- glycollate. This reduces disulphide bonds in the cuticle and cortex and allows hydrogen perox- ide to reform bonds in their new position. As covalent bonds adopt new positions, the extensive network of salt bridges and hydrogen bonds do so as well. Although the process and formula- tions are quite different, it should be remembered that thyoglycollates are also the bases for effective depilatories. When used for hair removal the reductive step is left to progress further and is not neutralized by hydrogen peroxide. There are a number of recorded cases of severe hair breakage following permanent waves, no doubt caused by poor control of the reductive step. Most relaxers are used to straighten curly hair, in which case the term relaxer is something of a misnomer. In order to straighten the hair it must also be pulled straight to form its new shape, so straight hair is not a relaxed state of a curl. Relaxers or straighteners require additional tension to pull the ber straight on already weak hair, and may also involve the use of hot irons resulting in hair that is particularly weak but far from relaxed. One should remember that high concentrations of sodium hydroxide are a useful tool for dissolving hair for analytical tests. Relaxers left on for too long can certainly cause widespread hair breakage close to the scalp as well as extensive scalp irritation. Both permanent waves and relaxers remove the f-layer from the ber and damage inter- cellular cements. In addition, changes in the extractable proteins and amino acid proles are always evident. These combined effects result in bers that are hydrophilic, of reduced tensile and torsional strength, are prone to tangling, and show an increased rate of weathering (Table 2). Many clinicians are aware of personal injury litigation in which obvious hair changes have taken place following a major hair event such as a perm or bleach. Treatment Visible hair surface Internal changes Tensile strength shampooed hair Shampoo Intact f-layer Surfactant deposition Very slight decrease No increase in Small increase in with increasing cysteic acid metal content, esp. There are, however, a number of clinical markers that will point the clinician to poor cosmetic practices. Trichorrexhis Nodosa Investigation: When numerous bers are affected, small white spots are easily seen on the hair with the naked eye and can be conrmed with a hand lens. Transmitted or plane polarized light microscopy shows characteristic focal burst along the ber or brush breaks where the node has parted. Additional observations should be made of the apparently normal parts of the ber to rule out any predisposing conditions, such as pili annulati or pili torti, that may previously have gone unnoticed. While it is important to exclude any underlying pathology or metabolic changes, it is unlikely that a patient who previously had normal hair will have developed signicantly weaker hair. It must be remembered that where trichorrhexis nodes appear toward the tips on longer bers, that part of the hair was actually formed many months before the patient pre- sented with trichorrexhis nodosa. However, the combination of insults and insufcient care may result in catastrophic ber damage. In order to understand 26 Gummer the severity of a patient s cosmetic regimen it may be useful to measure the distance from the scalp to the rst onset of trichorrhexis nodosa as an indication of how long the best part of the ber can withstand the current level of trauma. It is probable that a chemical (permanent wave) or thermal (tongs) insult is indicated in the process. The current fashion trend for per- fectly straight hair has spawned a number of treatments and straightening irons that claim to be good for the hair. The author has observed an increase in trichorrhexis nodosa among young females who are seemingly wedded to their straightening irons. Bubble Hair Investigation: Routine light microscopy, or a hand lens, reveals swelling and honeycomb-like structures at the broken, distal end of the ber (5). Very small (~5 micron) dome-like protrusions on cuticle scales are com- mon on normal hair, though difcult to see by light microscopy, and should not be confused with bubble hair. The patient presents with a single episode of claimed hair loss that may affect either the whole of the scalp or one of more poorly dened areas. When associated with a specic chemical treatment, hair breakage often begins several days after the causative procedure. Investigation: True hair loss from the follicle rarely, if ever, occurs due to cosmetic prac- tices. Routine light microscopy of the shed bers normally shows a fracture or trichorrhexis nodosa brush break at the proximal end. The distal end can present either as damaged, or often as a clean scissor cut, particularly when a haircut has preceded a chemical treatment. Matting or Tangling Even hair in perfect condition is prone to tangling, especially when wet. Severe tangling or matting, which may be impossible to unravel, can occur in hair approaching shoulder length or longer and is an indication of both poor hair condition and poor handling of the hair. Progressive damage, subsequent to chemical treatments, makes bers higher in friction and rougher to the touch. The best approach is to advise on a high quality cut and counsel on the time it will take to regrow the hair. Matting that requires a patient to present to a clinician is a single catastrophic event. It will suddenly occur and may, or may not, coincide with a change in cosmetic products. However, the patient may have had some degree of pre-warning with small tangles or knots appearing at the ends of their hair during routine shampooing and grooming. These are typical in chemically damaged hair and appear to be understood by most consumers. Matting typically affects a single loca- tion but involves many, many adjacent bers and hence may have extensive involvement on the head. The site of matting is invariably at the back of the head and typically occurs during the washing or conditioning step and only when the hair is wet. The location is due primarily to the difculty in reaching and handling the hair when shampooing, such that the hair is piled up leading to massive ber-to-ber interactions. Investigation: Matting is always obvious to the naked eye and requires no further inves- tigative techniques. However, it is possible that there is no history of such treatments as even poorly Evaluation Techniques 27 handled normal hair will mat. The actual matting event is unlikely to be related to any particu- lar product use. The principal question to ask is, What additional value does the investigation bring to the diagnosis and treatment of the patient? Each patient represents a consumer group adopting typical habits and practices, all of which may be considered normal for that individual but will have a denite and visible impact on the hair. An appreciation of the patient as a consumer is essential before further analysis is undertaken. This section is designed to explore the available techniques in order of usefulness to the clinician. An important point to remember is that nature has produced in hair a highly cross-linked protein sample that is easy to harvest in quantity.