alexa MicroRNAs in rheumatoid arthritis: potential role in diagnosis and therapy.
Immunology

Immunology

Journal of Inflammatory Bowel Diseases & Disorders

Author(s): Filkov M, Jngel A, Gay RE, Gay S

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Abstract Rheumatoid arthritis (RA) is a systemic, inflammatory, autoimmune disorder with progressive articular damage that may result in lifelong disability. Although major strides in understanding the disease have been made, the pathogenesis of RA has not yet been fully elucidated. Early treatment can prevent severe disability and lead to remarkable patient benefits, although a lack of therapeutic efficiency in a considerable number of patients remains problematic. MicroRNAs (miRNAs) are small, non-coding RNAs that, depending upon base pairing to messenger RNA (mRNA), mediate mRNA cleavage, translational repression or mRNA destabilization. As fine tuning regulators of gene expression, miRNAs are involved in crucial cellular processes and their dysregulation has been described in many cell types in different diseases. In body fluids, miRNAs are present in microvesicles or incorporated into complexes with Argonaute 2 (Ago2) or high-density lipoproteins and show high stability. Therefore, they are of interest as potential biomarkers of disease in daily diagnostic applications. Targeting miRNAs by gain or loss of function approaches have brought therapeutic effects in various animal models. Over the past several years it has become clear that alterations exist in the expression of miRNAs in patients with RA. Increasing numbers of studies have shown that dysregulation of miRNAs in peripheral blood mononuclear cells or isolated T lymphocytes, in synovial tissue and synovial fibroblasts that are considered key effector cells in joint destruction, contributes to inflammation, degradation of extracellular matrix and invasive behaviour of resident cells. Thereby, miRNAs maintain the pathophysiological process typical of RA. The aim of the current review is to discuss the available evidence linking the expression of miRNAs to inflammatory and immune response in RA and their potential as biomarkers and the novel targets for treatment in patients with RA. This article was published in BioDrugs and referenced in Journal of Inflammatory Bowel Diseases & Disorders

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