alexa Interleukin-1 and transforming growth factor-beta 1 as crucial factors in osteoarthritic cartilage metabolism.
Orthopaedics

Orthopaedics

Journal of Arthritis

Author(s): Pujol JP, Chadjichristos C, Legendre F, Bauge C, Beauchef G,

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Abstract In osteoarthritis (OA), interleukin-1 (IL-1) stimulates the expression of metalloproteinases and aggrecanases, which induce cartilage degradation. IL-1 is also capable of reducing the production of cartilage-specific macromolecules, including type II collagen, through modulation of the transcription factors Sp1 and Sp3. Conversely, Transforming growth factor-beta (TGF-beta) counteracts with most of the IL-1 deleterious effects and contributes to cartilage homeostasis. However, OA chondrocytes progressively loose the expression of TGF-beta type II receptor and become insensitive to the factor. This downregulation is also driven by IL-1. This review provides insights into the molecular mechanisms that underly the interplay between IL-1 and TGF-beta in OA cartilage metabolism and enlightens the central role of Sp1 and Sp3 transcription factors in the matrix pathological alterations. This article was published in Connect Tissue Res and referenced in Journal of Arthritis

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