Discontinuation of non-anti-TNF drugs for rheumatoid arthritis in interventional versus observational studies: a systematic review and meta-analysis

Discontinuation of biologic and target-specific therapy in patients with rheumatoid arthritis: a retrospective cohort study

BACKGROUND

Rheumatoid arthritis is a progressive disease that requires continuous treatment. Despite the excellent results, treatment with biologics and target-specific disease-modifying anti-rheumatic drugs often has to be interrupted due to insufficient therapeutic effectiveness, toxicity, or side effects.

PURPOSE

The purpose of this study is to identify the reasons and factors influencing treatment discontinuation with biologic and target-specific drugs among the Bulgarian patients with rheumatoid arthritis.

PATIENTS AND METHODS

This is a single-centre, retrospective observational cohort study, that includes 154 patients with seropositive rheumatoid arthritis, who underwent a total of 221 therapeutic courses with biologic and target-specific drugs over a period of 12 years.

RESULTS

Out of the 221 therapeutic courses, 103 (46.6%) were discontinued. Due to an initial lack of efficacy, treatment was interrupted in 38 of cases (36.9%). A secondary lack of efficacy led to the discontinuation of 24 treatment regimens (23.3%). Allergic reactions and "other" reasons necessitated the cessation of therapy in 41 cases (39.8%). The male gender (HR = 2.111; 95%CI 1.261-3.535), age below 59 years (HR = 1.791, 95%CI 1.162-2.760), shorter disease duration (HR = 0.995, 95%CI 0.993-0.998), co-morbidity with diabetes mellitus (HR = 3.463, 95%CI 1.189-10.090), cerebrovascular disease (HR = 2.490, 95%CI 1.215-5.102), and the type of medication were identified as factors influencing the interruption of treatment. Age (p = 0.012), disease duration (р=0.06), and therapy duration (р<0.01) have a significant impact on the reasons for treatment discontinuation.

CONCLUSIONS

Awareness of the reasons and factors influencing the discontinuation of treatment with biologic and target-specific drugs is crucial for improving existing therapeutic strategies and developing futures ones.

Design, implementation, and inferential issues associated with clinical trials that rely on data in electronic medical records: a narrative review

Real world evidence is now accepted by authorities charged with assessing the benefits and harms of new therapies. Clinical trials based on real world evidence are much less expensive than randomized clinical trials that do not rely on "real world evidence" such as contained in electronic health records (EHR). Consequently, we can expect an increase in the number of reports of these types of trials, which we identify here as 'EHR-sourced trials.' 'In this selected literature review, we discuss the various designs and the ethical issues they raise. EHR-sourced trials have the potential to improve/increase common data elements and other aspects of the EHR and related systems. Caution is advised, however, in drawing causal inferences about the relationships among EHR variables. Nevertheless, we anticipate that EHR-CTs will play a central role in answering research and regulatory questions.

Differential Expression Profiles of the Transcriptome and miRNA Interactome in Synovial Fibroblasts of Rheumatoid Arthritis Revealed by Next Generation Sequencing

Using next-generation sequencing to decipher the molecular mechanisms underlying aberrant rheumatoid arthritis synovial fibroblasts (RASF) activation, we performed transcriptome-wide RNA-seq and small RNA-seq on synovial fibroblasts from rheumatoid arthritis (RA) subject and normal donor. Differential expression of mRNA and miRNA was integrated with interaction analysis, functional annotation, regulatory network mapping and experimentally verified miRNA–target interaction data, further validated with microarray expression profiles. In this study, 3049 upregulated mRNA and 3552 downregulated mRNA, together with 50 upregulated miRNA and 35 downregulated miRNA in RASF were identified. Interaction analysis highlighted contribution of miRNA to altered transcriptome. Functional annotation revealed metabolic deregulation and oncogenic signatures of RASF. Regulatory network mapping identified downregulated FOXO1 as master transcription factor resulting in altered transcriptome of RASF. Differential expression in three miRNA and corresponding targets (hsa-miR-31-5p:WASF3, hsa-miR-132-3p:RB1, hsa-miR-29c-3p:COL1A1) were also validated. The interactions of these three miRNA–target genes were experimentally validated with past literature. Our transcriptomic and miRNA interactomic investigation identified gene signatures associated with RASF and revealed the involvement of transcription factors and miRNA in an altered transcriptome. These findings help facilitate our understanding of RA with the hope of serving as a springboard for further discoveries relating to the disease.