CXCL10 is Upregulated in Synovium and Cartilage following Articular Fracture.

Abstract

The objective of this study was to investigate the expression of the chemokine CXCL10 and its role in joint tissues following articular fracture. We hypothesized that CXCL10 is upregulated following articular fracture and contributes to cartilage degradation associated with post-traumatic arthritis (PTA). To evaluate CXCL10 expression following articular fracture, gene expression was quantified in synovial tissue from knee joints of C57BL/6 mice that develop PTA following articular fracture, and MRL/MpJ mice that are protected from PTA. CXCL10 protein expression was assessed in human cartilage in normal, osteoarthritic (OA), and post-traumatic tissue using immunohistochemistry. The effects of exogenous CXCL10, alone and in combination with IL-1, on porcine cartilage explants were assessed by quantifying the release of catabolic mediators. Synovial tissue gene expression of CXCL10 was upregulated by joint trauma, peaking one day in C57BL/6 mice (25-fold) vs. three days post-fracture in MRL/MpJ mice (15-fold). CXCL10 protein in articular cartilage was most highly expressed following trauma compared with normal and OA tissue. In a dose dependent manner, exogenous CXCL10 significantly reduced total matrix metalloproteinase (MMP) and aggrecanase activity of culture media from cartilage explants. CXCL10 also trended toward a reduction in IL-1α-stimulated total MMP activity (p=0.09) and S-GAG (p=0.09), but not NO release. In conclusion, CXCL10 was upregulated in synovium and chondrocytes following trauma. However, exogenous CXCL10 did not induce a catabolic response in cartilage. CXCL10 may play a role in modulating the chondrocyte response to inflammatory stimuli associated with joint injury and the progression of PTA. This article is protected by copyright. All rights reserved.

Department

Description

Provenance

Citation

Published Version (Please cite this version)

10.1002/jor.23735

Publication Info

Furman, Bridgette D, Collin L Kent, Janet L Huebner, Virginia B Kraus, Amy L McNulty, Farshid Guilak and Steven A Olson (2017). CXCL10 is Upregulated in Synovium and Cartilage following Articular Fracture. J Orthop Res. 10.1002/jor.23735 Retrieved from https://hdl.handle.net/10161/15588.

This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.

Scholars@Duke

Kraus

Virginia Byers Kraus

Mary Bernheim Distinguished Professor of Medicine

Virginia Byers Kraus, MD, PhD, is the Mary Bernheim Distinguished Professor of Medicine, Professor of Orthopaedic Surgery, Professor of Pathology and a faculty member of the Duke Molecular Physiology Institute in the Duke University School of Medicine. She is a practicing Rheumatologist with over 30 years’ experience in translational musculoskeletal research focusing on osteoarthritis, the most common of all arthritides. She trained at Brown University (ScB 1979), Duke University (MD 1982, PhD 1993) and the Duke University School of Medicine (Residency in Internal Medicine and Fellowship in Rheumatology). Her career has focused on elucidating osteoarthritis pathogenesis and translational research into the discovery and validation of biomarkers for early osteoarthritis detection, prediction of progression, monitoring of disease status, and facilitation of therapeutic developments. She is co-PI of the Foundation for NIH Biomarkers Consortium Osteoarthritis project. Trained as a molecular biologist and a Rheumatologist, she endeavors to study disease from bedside to bench.

McNulty

Amy Lynn McNulty

Associate Professor in Orthopaedic Surgery

The McNulty Lab is working to develop strategies to prevent osteoarthritis and to promote tissue repair and regeneration following joint injury. In order to accomplish this, we are working in three main areas.  1) We are working to understand the pathways that are activated by normal and injurious mechanical loading of cartilage and meniscus and how these mechanotransduction pathways are altered during aging, injury, and tissue degeneration. A greater understanding of alterations in mechanosensitive signaling mechanisms with aging and injury will likely reveal potential targets to promote tissue repair and prevent tissue degeneration and osteoarthritis development. 2) We are developing meniscus tissue engineered constructs that will be utilized to repair and replace meniscus tissue lost due to injury and surgical resection.  3)  We are focusing on the biological and biomechanical changes that occur in the joint following meniscus injury and how these may contribute to osteoarthritis development.   


Unless otherwise indicated, scholarly articles published by Duke faculty members are made available here with a CC-BY-NC (Creative Commons Attribution Non-Commercial) license, as enabled by the Duke Open Access Policy. If you wish to use the materials in ways not already permitted under CC-BY-NC, please consult the copyright owner. Other materials are made available here through the author’s grant of a non-exclusive license to make their work openly accessible.