Life Sciences & Biomedicine Rheumatology Science & Technology
Fibrosis in multiple organs is a prominent pathological finding and distinguishing hallmark of systemic sclerosis (SSc). Findings during the past 5 years have contributed to a more complete understanding of the complex cellular and molecular underpinning of fibrosis in SSc. Fibroblasts, the principal effector cells, are activated in the profibrotic cellular milieu by cytokines and growth factors, developmental pathways, endothelin 1 and thrombin. Innate immune signaling via Toll-like receptors, matrix-generated biomechanical stress signaling via integrins, hypoxia and oxidative stress seem to be implicated in perpetuating the process. Beyond chronic fibroblast activation, fibrosis represents a failure to terminate tissue repair, coupled with an expanded population of mesenchymal cells originating from bone marrow and transdifferentiation of epithelial cells, endothelial cells and pericytes. In addition, studies have identified intrinsic alterations in SSc fibroblasts resulting from epigenetic changes, as well as altered microRNA expression that might underlie the cell-autonomous, persistent activation phenotype of these cells. Precise characterization of the deregulated extracellular and intracellular signaling pathways, mediators and cellular differentiation programs that contribute to fibrosis in SSc will facilitate the development of selective, targeted therapeutic strategies. Effective antifibrotic therapy will ultimately involve novel compounds and repurposing of drugs that are already approved for other indications.
Understanding fibrosis in systemic sclerosis: shifting paradigms, emerging opportunities
Creators
Swati Bhattacharyya - Northwestern University
Jun Wei - Northwestern University
John Varga - Northwestern University
Carol Artlett - Microbiology and Immunology
Publication Details
Nature reviews. Rheumatology, v 8(1)
Publisher
Springer Nature
Number of pages
13
Grant note
AR 42309 / National Institutes of Health; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA
R01AR042309 / NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Arthritis & Musculoskeletal & Skin Diseases (NIAMS)
Scleroderma Research Foundation
Resource Type
Journal article
Language
English
Academic Unit
Microbiology and Immunology
Web of Science ID
WOS:000298382100008
Scopus ID
2-s2.0-84655175061
Other Identifier
991020200753004721
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