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Inhibition of cyclooxygenase-2 activity in subchondral bone modifies a subtype of osteoarthritis.


ABSTRACT: Osteoarthritis (OA) causes the destruction of joints. Its pathogenesis is still under investigation, and there is no effective disease-modifying therapy. Here, we report that elevated cyclooxygenase-2 (COX-2) expression in the osteocytes of subchondral bone causes both spontaneous OA and rheumatoid arthritis (RA). The knockout of COX-2 in osteocytes or treatment with a COX-2 inhibitor effectively rescues the structure of subchondral bone and attenuates cartilage degeneration in spontaneous OA (STR/Ort) mice and tumor necrosis factor-? transgenic RA mice. Thus, elevated COX-2 expression in subchondral bone induces both OA-associated and RA-associated joint cartilage degeneration. The inhibition of COX-2 expression can potentially modify joint destruction in patients with arthritis.

SUBMITTER: Tu M 

PROVIDER: S-EPMC6804921 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Inhibition of cyclooxygenase-2 activity in subchondral bone modifies a subtype of osteoarthritis.

Tu Manli M   Yang Mi M   Yu Nanxi N   Zhen Gehua G   Wan Mei M   Liu Wenlong W   Ji Baochao B   Ma Hairong H   Guo Qiaoyue Q   Tong Peijian P   Cao Li L   Luo Xianghang X   Cao Xu X  

Bone research 20190911


Osteoarthritis (OA) causes the destruction of joints. Its pathogenesis is still under investigation, and there is no effective disease-modifying therapy. Here, we report that elevated cyclooxygenase-2 (COX-2) expression in the osteocytes of subchondral bone causes both spontaneous OA and rheumatoid arthritis (RA). The knockout of COX-2 in osteocytes or treatment with a COX-2 inhibitor effectively rescues the structure of subchondral bone and attenuates cartilage degeneration in spontaneous OA (S  ...[more]

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