Abstract：
:1,25-Dihydroxyvitamin D [1,25(OH)(2)D] insufficiency appears to be associated with several age-related diseases. Insufficient levels of serum 25-hydroxyvitamin D has been shown to lead to the progression of osteoarthritis (OA) while underlying biological mechanisms remain largely unknown. In this study, we sought to determine whether 1,25(OH)(2)D deficiency has a direct effect on the process of murine temporomandibular joint (TMJ) OA in 25-hydroxyvitamin D 1α-hydroxylase knockout [1α(OH)ase(-/-)] mice that had been fed a rescue diet (high calcium, phosphate, and lactose) from weaning until 6 or 18 months of age. Our results showed that the bone mineral density and subchondral bone volume were reduced in mandibular condyles, articular surfaces were collapsed, the thickness of articular cartilage and cartilage matrix protein abundance were progressively decreased and eventually led to an erosion of articular cartilage of mandibular condyles. We also found that DNA damage, cellular senescence and the production of senescence-associated inflammatory cytokines were increased significantly in 1α(OH)ase(-/-) mice. This study demonstrates that 1,25(OH)(2)D deficiency causes an erosive TMJ OA phenotype by inducing DNA damage, cellular senescence and the production of senescence-associated inflammatory cytokines. Our results indicate that 1,25(OH)(2)D plays an important role in preventing the development and progression of OA.
journal_name
Bonejournal_title
Boneauthors
Shen M,Luo Y,Niu Y,Chen L,Yuan X,Goltzman D,Chen N,Miao Ddoi
10.1016/j.bone.2013.04.015subject
Has Abstractpub_date
2013-08-01 00:00:00pages
400-9issue
2eissn
8756-3282issn
1873-2763pii
S8756-3282(13)00158-0journal_volume
55pub_type
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