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Aberrant Activation of TGF-? in Subchondral Bone at the Onset of Rheumatoid Arthritis Joint Destruction.


ABSTRACT: Rheumatoid arthritis (RA) is an autoimmune disease that often leads to joint destruction. A myriad of drugs targeting the immune abnormalities and downstream inflammatory cascades have been developed, but the joint destruction is not effectively halted. Here we report that aberrant activation of TGF-? in the subchondral bone marrow by immune response increases osteoprogenitors and uncoupled bone resorption and formation in RA mouse/rat models. Importantly, either systemic or local blockade of TGF-? activity in the subchondral bone attenuated articular cartilage degeneration in RA. Moreover, conditional deletion of TGF-? receptor II (Tgfbr2) in nestin-positive cells also effectively halted progression of RA joint destruction. Our data demonstrate that aberrant activation of TGF-? in the subchondral bone is involved at the onset of RA joint cartilage degeneration. Thus, modulation of subchondral bone TGF-? activity could be a potential therapy for RA joint destruction.

SUBMITTER: Xu X 

PROVIDER: S-EPMC4809636 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature

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Aberrant Activation of TGF-β in Subchondral Bone at the Onset of Rheumatoid Arthritis Joint Destruction.

Xu Xin X   Zheng Liwei L   Bian Qin Q   Xie Liang L   Liu Wenlong W   Zhen Gehua G   Crane Janet L JL   Zhou Xuedong X   Cao Xu X  

Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 20150608 11


Rheumatoid arthritis (RA) is an autoimmune disease that often leads to joint destruction. A myriad of drugs targeting the immune abnormalities and downstream inflammatory cascades have been developed, but the joint destruction is not effectively halted. Here we report that aberrant activation of TGF-β in the subchondral bone marrow by immune response increases osteoprogenitors and uncoupled bone resorption and formation in RA mouse/rat models. Importantly, either systemic or local blockade of TG  ...[more]

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