By I. Jaroll. Smith College.
The authors conducted a network meta-analysis (mixed- effects logistic regression using an arm-based random-effects model within an empirical Beyes framework and Poisson distribution) on the incidence of serious infections with all of the targeted immune modulators using data from published systematic reviews with meta-analyses buy bupron sr 150 mg without a prescription, including data from 119 studies and 41 036 patients cheap 150mg bupron sr mastercard. No reviews of natalizumab or alefacept were available at the time so the two drugs were not included effective bupron sr 150 mg. Serious infections were included based on individual study definitions, typically deaths, hospitalizations, and use of intravenous antibiotics associated with infection. The overall quality of the bodies of evidence (using the GRADE rating system) was high for abatacept and certolizumab and moderate for all others except rituximab, which was rated low quality. Relative to control groups, only certolizumab was associated with a statistically significant increase in risk of serious infection (odds ratio, 3. As a group, the targeted immune modulators did not result in increased odds of a serious infection compared with control groups (pooled odds ratio, 1. In indirect comparisons (network analysis adjusted for dose), abatacept resulted in statistically significantly lower odds of a serious infection compared with certolizumab, infliximab, and tocilizumab while certolizumab was associated with greater odds than adalimumab, anakinra, etanercept, golimumab, infliximab, rituximab, and placebo (Table 17). Statistically significant indirect comparisons: Serious Infection Drug Comparator drug Odds ratio 95% confidence interval Abatacept Certolizumab 0. The studies were similar to those included in the meta-analysis, and their results did not conflict with the network analysis results. For example, at 52 weeks, patients taking 100 mg of golimumab had the highest rate of serious infections (3. A small fair-quality trial of patients with rheumatoid arthritis who had failed at least one course of antitumor necrosis factor drugs received one course of open-label rituximab and then were randomized to placebo or 300 rituximab for a second course. There was no difference between groups in the rate of serious infection at week 48 (2% in each group). A pooled analysis of only abatacept trials and extension studies made comparisons of rates of hospitalization due to infection and pneumonia between 302 trial rates and estimates from epidemiological studies. Neither analysis showed a statistically significant increase in risk with abatacept. A similar pooled analysis of rituximab data found the rate of serious infection to be 4. A pooled analysis of certolizumab studies in patients with Crohn’s disease found that continued treatment following remission resulted in a rate of 7. Direct evidence from observational studies of targeted immune modulators included a good-quality prospective cohort study of registry data on patients with rheumatoid arthritis in 270 Britain. A total of 15 396 patients were included in this analysis. As a group antitumor necrosis factor drugs (adalimumab, etanercept and infliximab) resulted in statistically significant increase in risk for serious infections compared with disease-modifying antirheumatic drugs (adjusted hazard ratio, 1. Mortality within 30 days of serious infection, however, was statistically significantly lower with antitumor necrosis factor drugs (hazard ratio, 0. There were no statistically significant differences in risk of serious infection found between drugs, no difference in hospital stay, and no difference in risk in older patients. A fair quality retrospective cohort study of administrative medical and pharmacy data on 6992 patients with rheumatoid arthritis identified hospitalizations with ICD-9 codes for 283 infection and who were treated with a targeted immune modulator. In contrast to the study above, across all patients, regardless of whether they were using a targeted immune modulator drug for the first time or were switching from another such drug, abatacept (adjusted hazard ratio, 0. Rituximab was not found statistically significantly different. The study found also that the patients underlying risk for infection was a significant confounder. Progressive multifocal leukoencephalopathy In June 2009, the manufacturer of efalizumab voluntarily withdrew the drug from the United States market because of an increased risk of progressive multifocal leukoencephalopathy. Progressive multifocal leukoencephalopathy is a rapidly progressive, viral infection of the central nervous system that leads to death or severe disability. A case series of more than 3000 patients treated with natalizumab for various indications did not meet our formal inclusion criteria.
Cohort study: An observational study in which a defined group of people (the cohort) is followed over time and compared with a group of people who were exposed or not exposed to a particular intervention or other factor of interest order 150 mg bupron sr with visa. A prospective cohort study assembles participants and follows them into the future bupron sr 150mg low cost. A retrospective cohort study identifies subjects from past records and follows them from the time of those records to the present generic 150mg bupron sr fast delivery. Combination Therapy: The use of two or more therapies and especially drugs to treat a disease or condition. Confidence interval: The range of values calculated from the data such that there is a level of confidence, or certainty, that it contains the true value. The 95% confidence interval is generally used in Drug Effectiveness Review Project reports. If the report was hypothetically repeated on a collection of 100 random samples of studies, the resulting 100 95% confidence intervals would include the true population value 95% of the time. Confounder: A factor that is associated with both an intervention and an outcome of interest. Controlled clinical trial: A clinical trial that includes a control group but no or inadequate methods of randomization. Control group: In a research study, the group of people who do not receive the treatment being tested. The control group might receive a placebo, a different treatment for the disease, or no treatment at all. Convenience sample: A group of individuals being studied because they are conveniently accessible in some way. Convenience samples may or may not be representative of a population that would normally be receiving an intervention. Crossover trial: A type of clinical trial comparing two or more interventions in which the participants, upon completion of the course of one treatment, are switched to another. Direct analysis: The practice of using data from head-to-head trials to draw conclusions about the comparative effectiveness of drugs within a class or group. Results of direct analysis are the preferred source of data in Drug Effectiveness Review Project reports. Dosage form: The physical form of a dose of medication, such as a capsule, injection, or liquid. The route of administration is dependent on the dosage form of a given drug. Various dosage Statins Page 106 of 128 Final Report Update 5 Drug Effectiveness Review Project forms may exist for the same compound, since different medical conditions may warrant different routes of administration. Dose-response relationship: The relationship between the quantity of treatment given and its effect on outcome. In meta-analysis, dose-response relationships can be investigated using meta- regression. Double-blind: The process of preventing those involved in a trial from knowing to which comparison group a particular participant belongs. While double-blind is a frequently used term in trials, its meaning can vary to include blinding of patients, caregivers, investigators, or other study staff. Double-dummy: The use of two placebos in a trial that match the active interventions when they vary in appearance or method of administrations (for example, when an oral agent is compared with an injectable agent). Effectiveness: The extent to which a specific intervention used under ordinary circumstances does what it is intended to do. Effectiveness outcomes: Outcomes that are generally important to patients and caregivers, such as quality of life, responder rates, number and length of hospitalizations, and ability to work. Data on effectiveness outcomes usually comes from longer-term studies of a “real-world” population. Effect size/estimate of effect: The amount of change in a condition or symptom because of a treatment (compared to not receiving the treatment). It is commonly expressed as a risk ratio (relative risk), odds ratio, or difference in risk.
Platelet-rich Injection of platelet-rich plasma in patients with primary and plasma treatment in symptomatic patients with knee osteoarthri- secondary knee osteoarthritis: a pilot study generic bupron sr 150mg with mastercard. Am J Phys Med tis: Preliminary results in a group of active patients 150mg bupron sr fast delivery. Spakova T discount bupron sr 150mg amex, Rosocha J, Lacko M, Harvanova D, Gharaibeh A. Treatment of knee joint osteoarthritis with autologous platelet- Treatment with platelet-rich plasma is more effective than rich plasma in comparison with hyaluronic acid. Am J Phys placebo for knee osteoarthritis: A prospective, double-blind, Med Rehabil. Autologous intra-articular injection versus hyaluronic acid viscosupplemen- interleukin-1 receptor antagonist improves function and symp- tation as treatments for cartilage pathology: From early degen- toms in osteoarthritis when compared to placebo in a prospec- eration to osteoarthritis. Hemophagocytic lymphohistiocytosis: pathogenesis and treatment Gritta E. Janka1 and Kai Lehmberg1 1University Medical Center Eppendorf, Hamburg, Germany Hemophagocytic lymphohistiocytosis (HLH) is not an independent disease but rather a life-threatening clinical syndrome that occurs in many underlying conditions and in all age groups. HLH is the consequence of a severe, uncontrolled hyperinﬂammatory reaction that in most cases is triggered by an infectious agent. Persistent stimulation of lymphocytes and histiocytes results in hypercytokinemia, leading to the characteristic symptoms of HLH. Genetic defects in familial HLH and in immunodeﬁciency syndromes associated with albinism affect the transport, processing, and function of cytotoxic granules in natural killer cells and cytotoxic T lymphocytes. This leads to defective killing of target cells and a failure to contract the immune response. The defects are increasingly found also in adolescents and adults. Acquired HLH occurs in autoinﬂammatory and autoimmune diseases (macrophage activation syndrome) and in patients with iatrogenic immunosuppression or with malignancies, but also in otherwise healthy persons with infections. Treatment of HLH aims at suppressing hypercytokinemia and eliminating the activated and infected cells. In genetic HLH, hematopoietic stem cell transplantation (HSCT) is needed for the correction of the immune defect. Treatment modalities include immunosuppressive, immunomodulatory, and cytostatic drugs; T-cell antibodies; and anticytokine agents. Using immunochemotherapy, familial HLH, which had been invariably fatal, has become a curable disease with more than 50% survivors. Reduced intensity conditioning for HSCT, which is associated with less transplantation-related mortality, will further improve cure rates. Introduction laboratory abnormalities and the progressiveness of the symptoms. For more detailed informa- inﬂammatory response syndrome (SIRS), has received increasing tion, the reader is referred to recent reviews. Genetic and acquired HLH Until recently, age was thought to roughly discriminate between HLH is a clinical syndrome genetic (“inherited”) and acquired (“secondary”) forms of HLH. The deﬁnition of HLH is the key to understanding HLH: HLH is not However, the detection of an increasing number of genetic cases in a single disease, but rather a hyperinﬂammatory syndrome caused adolescents and adults proves this assumption erroneous. HLH is associated with many phic monoallelic or biallelic mutations in genes of familial HLH underlying conditions and affects all age groups. The cardinal 7 (FHL) were found in 14% of the patients. Characteristic laboratory abnormalities Four genetic defects have been identiﬁed in FHL and all of the genes include elevated ferritin, triglycerides, transaminases, bilirubin, and are involved in cytotoxic granule exocytosis or function (Table 1). Hemophagocytosis is not In Germany, less than 10% of patients with FHL show none of the 4 an obligatory symptom and may be absent initially. Familiarity in these patients can be assumed by an Recently, attention has been drawn to atypical symptoms in genetic abnormal degranulation test or persistently deﬁcient activity of HLH, including chronic diarrhea, sensorineural hearing loss, and a natural killer (NK) cells (see “How to differentiate genetic HLH clinical presentation resembling chronic variable immunodeﬁ- from acquired HLH” below).
Second buy bupron sr 150mg mastercard, naturally occurring variants from ﬁeld isolates may be tested against a panel of antibodies 150mg bupron sr with amex. Certain sets of antibodies may bind most isolates buy cheap bupron sr 150mg online, allowing identiﬁcation of those variants that diﬀer at commonly recognized epitopes. Escape variants gain a ﬁtness advantage by avoiding antibody recogni- tion targeted to important epitopes. However, those pathogen epitopes may also play a role in binding to host cells, in release from infected cells, or in some other aspect of the pathogen’s life cycle. Functional and structural studies of amino acid substitutions provide one method of analysis. That approach has the advantage of directly assessing the mechanisms by which amino acid variants aﬀect multiple components of parasite ﬁtness, such as escape from antibody recognition and altered host attachment characteristics. Although functional andstructural approaches candirectlymeasure binding diﬀerences caused by amino acid substitutions in diﬀerent ge- netic backgrounds, they cannot provide a good measure of all the ﬁtness consequences associated with changes in genotype. They studied the relative ﬁt- nesses in vivo of a parental FMDV genotype and three mutant genotypes derived from the parental type. They measured relative ﬁtness by com- peting pairs of strains within live pigs. The parental type, C-S8c1, came from a C serotype isolated from a pig. The ﬁrst monoclonal antibody–resistant mutant, MARM21, arose in a pig infected with C-S8c1. MARM21 diﬀers from C-S8c1 by a single change from serine to arginine at VP1 139 (ﬁg. The second mutant, S-3T1,camefromablood sample of a pig one day after experimental inoculation with C-S8c1. That isolate had a single change from threonine to alanine at VP1 135 (ﬁg. Only one of ﬁfty- eight monoclonal antibodies diﬀerentiated between the parental type and S-3T1,and the diﬀerence in aﬃnity was small. The third mutant, C-S15c1, derived from a ﬁeld variant of type C1 isolated from a pig. This mutant type had eight amino acid diﬀerences in VP1 compared with C-S8c1. One of the three mutants was coinoculated with the parental type into each experimental pig. Two replicate pigs were used for each of the three pairs of mutant and parental types. Fever rose one day after infection and peaked two or three days postinfection. All animals devel- oped vesicular lesions two to four days postinfection. For each animal, between two and seven samples were taken from lesions, and the rela- tive proportions of the competing viruses were assayed by reactivity to monoclonal antibodies. The small sample sizes donotallow strong conclusions to be drawn. Rather, the following two results hint at what might be learned from more extensivestudiesof this sort. First, the parental type strongly dominated MARM21 in all seven lesions sampled from the two experi- mental animals, comprising between 80 and 94% of the viruses in each lesion. The MARM21 mutation appears to confer lower ﬁtness in vivo, at least in the two animals tested.
9 of 10 - Review by I. Jaroll
Votes: 75 votes
Total customer reviews: 75