[Biosimilars in rheumatology. Development and results of clinical trials]. / Biosimilars in der Rheumatologie. Entwicklung und Ergebnisse klinischer Studien.

BACKGROUND: This article presents the design of clinical trials for the development of biosimilars in the European Union and the United States, with special focus on inflammatory diseases. METHODS: All information available in PubMed and the Internet relating to the clinical development of biosimilars in inflammatory rheumatic conditions (e.g. rheumatoid arthritis, psoriasis, psoriatic arthritis and ankylosing spondylitis) was collated. The European Medicines Agency (EMA) and US Food and Drug Administration (FDA) websites were screened for guidelines on biosimilars. RESULTS: More than 10 years ago the EMA began to publish guidelines for the development of biosimilars and several biosimilars have now been approved. In the USA the FDA has published guidance for the nonclinical and clinical development of biosimilars but until early 2015 no biosimilar had been approved. CONCLUSION: Clinical trials aim to resolve uncertainties that may remain following nonclinical development regarding the similarity of the proposed biosimilar with the reference product. Pharmacokinetic and pharmacodynamic studies are essential for early clinical development and further phase 3 clinical studies. Factors to be considered in the clinical process include study population, design, endpoints, sample size, duration and analytical methods.

[Drug therapy of fibromyalgia syndrome. Systematic review, meta-analysis and guideline]. / Medikamentöse Therapie des Fibromyalgiesyndroms. Systematische Übersicht und Metaanalyse.

BACKGROUND: The scheduled update to the German S3 guidelines on fibromyalgia syndrome (FMS) by the Association of the Scientific Medical Societies ("Arbeitsgemeinschaft der Wissenschaftlichen Medizinischen Fachgesellschaften", AWMF; registration number 041/004) was planned starting in March 2011. MATERIALS AND METHODS: The development of the guidelines was coordinated by the German Interdisciplinary Association for Pain Therapy ("Deutsche Interdisziplinären Vereinigung für Schmerztherapie", DIVS), 9 scientific medical societies and 2 patient self-help organizations. Eight working groups with a total of 50 members were evenly balanced in terms of gender, medical field, potential conflicts of interest and hierarchical position in the medical and scientific fields. Literature searches were performed using the Medline, PsycInfo, Scopus and Cochrane Library databases (until December 2010). The grading of the strength of the evidence followed the scheme of the Oxford Centre for Evidence-Based Medicine. The recommendations were based on level of evidence, efficacy (meta-analysis of the outcomes pain, sleep, fatigue and health-related quality of life), acceptability (total dropout rate), risks (adverse events) and applicability of treatment modalities in the German health care system. The formulation and grading of recommendations was accomplished using a multi-step, formal consensus process. The guidelines were reviewed by the boards of the participating scientific medical societies. RESULTS AND CONCLUSION: Amitriptyline and-in case of comorbid depressive disorder or generalized anxiety disorder-duloxetine are recommended. Off-label use of duloxetine and pregabalin can be considered in case of no comorbid mental disorder. Strong opioids are not recommended. The English full-text version of this article is available at SpringerLink (under "Supplemental").

No benefit of long-term ciprofloxacin treatment in patients with reactive arthritis and undifferentiated oligoarthritis: a three-month, multicenter, double-blind, randomized, placebo-controlled study.

OBJECTIVE: To investigate the effect of long-term antibiotic treatment in patients with reactive arthritis (ReA) and undifferentiated oligoarthritis. METHODS: One hundred twenty-six patients were treated with ciprofloxacin (500 mg twice a day) or placebo for 3 months, in a double-blind, randomized study. Of these patients, 104 (48 treated with ciprofloxacin and 56 treated with placebo) were valid for clinical evaluation: 55 were diagnosed as having ReA with a preceding symptomatic urogenic or enteric infection and 49 as having undifferentiated oligoarthritis. These 2 groups were randomized separately. The triggering bacterium was sought by serology and/or culture. The percentage of patients in remission after 3 months of treatment was chosen as the primary efficacy parameter. RESULTS: A triggering bacterium could be identified in 52 patients (50%): Chlamydia trachomatis in 13, Yersinia in 14, and Salmonella in 25. No patient was positive for Campylobacter jejuni or for Shigella. No difference in outcome was found between treatment with ciprofloxacin or placebo in the whole group or in subgroups of patients with ReA or undifferentiated oligoarthritis. No difference was seen in patients with a disease duration <3 months. Ciprofloxacin was not effective in Yersinia- or Salmonella-induced arthritis but seemed to be better than placebo in Chlamydia-induced arthritis. This difference was not significant, however, which might be due to the small sample size. CONCLUSION: Long-term treatment of ReA with ciprofloxacin is not effective; however, it might be useful in the subgroup of patients who have Chlamydia-induced arthritis. This has to be proven in a bigger study focusing on patients with Chlamydia-induced arthritis.

Pain: a kaleidoscope of ideas, concepts and approaches.

The following pages contain summaries and short statements on chronic pain providing further material for reflection and debate, namely: a) synopses of recent findings on: the physiology and biochemistry of pain; the contribution of psychoneuroimmunology; b) some views on a sociology of pain; c) analysis of various concepts and approaches which consider pain as: a symptom of disease a form of behaviour a psychosomatic reaction and a social learning process a communication phenomenon a symptom of disintegrated life a disruption in the integrity of the system a signal of broken unity a breach in the wholeness of the individual; d) a holistic approach in pain therapy; e) some unanswered questions.