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Galectin-1 Couples Glycobiology to Inflammation in Osteoarthritis through the Activation of an NF-κB-Regulated Gene Network.
- Source :
-
Journal of immunology (Baltimore, Md. : 1950) [J Immunol] 2016 Feb 15; Vol. 196 (4), pp. 1910-21. Date of Electronic Publication: 2016 Jan 20. - Publication Year :
- 2016
-
Abstract
- Osteoarthritis is a degenerative joint disease that ranks among the leading causes of adult disability. Mechanisms underlying osteoarthritis pathogenesis are not yet fully elucidated, putting limits to current disease management and treatment. Based on the phenomenological evidence for dysregulation within the glycome of chondrocytes and the network of a family of adhesion/growth-regulatory lectins, that is, galectins, we tested the hypothesis that Galectin-1 is relevant for causing degeneration. Immunohistochemical analysis substantiated that Galectin-1 upregulation is associated with osteoarthritic cartilage and subchondral bone histopathology and severity of degeneration (p < 0.0001, n = 29 patients). In vitro, the lectin was secreted and it bound to osteoarthritic chondrocytes inhibitable by cognate sugar. Glycan-dependent Galectin-1 binding induced a set of disease markers, including matrix metalloproteinases and activated NF-κB, hereby switching on an inflammatory gene signature (p < 10(-16)). Inhibition of distinct components of the NF-κB pathway using dedicated inhibitors led to dose-dependent impairment of Galectin-1-mediated transcriptional activation. Enhanced secretion of effectors of degeneration such as three matrix metalloproteinases underscores the data's pathophysiological relevance. This study thus identifies Galectin-1 as a master regulator of clinically relevant inflammatory-response genes, working via NF-κB. Because inflammation is critical to cartilage degeneration in osteoarthritis, this report reveals an intimate relation of glycobiology to osteoarthritic cartilage degeneration.<br /> (Copyright © 2016 by The American Association of Immunologists, Inc.)
- Subjects :
- Adult
Aged
Aged, 80 and over
Blotting, Western
Cartilage, Articular metabolism
Cartilage, Articular pathology
Chondrocytes metabolism
Enzyme-Linked Immunosorbent Assay
Female
Fluorescent Antibody Technique
Glycomics
Humans
Immunohistochemistry
Inflammation genetics
Inflammation metabolism
Inflammation pathology
Male
Middle Aged
Oligonucleotide Array Sequence Analysis
Osteoarthritis genetics
Osteoarthritis pathology
Reverse Transcriptase Polymerase Chain Reaction
Galectin 1 metabolism
Gene Expression Regulation physiology
Gene Regulatory Networks physiology
NF-kappa B metabolism
Osteoarthritis metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1550-6606
- Volume :
- 196
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Journal of immunology (Baltimore, Md. : 1950)
- Publication Type :
- Academic Journal
- Accession number :
- 26792806
- Full Text :
- https://doi.org/10.4049/jimmunol.1501165