Epigenetic regulatory mechanism of ADAMTS12 expression in osteoarthritis

Molecular Medicine

Research Article

Zhen Jia¹  Duo Xia¹  Mali Zhang¹  Shu Yang¹  Jing Wang¹  Yizhao Zhou¹  Minghao Yuan¹  Xuanping Zhou² 

[1]Department of Orthopedics, Hunan Provincial People’s Hospital (The First-affiliated Hospital of Hunan Normal University), No. 61, Jiefang West Road, Furong District, 410005, Changsha, Hunan, People’s Republic of China

[2]Department of Orthopedics, The First-affiliated Hospital of Hunan Normal University (Hunan Provincial People’s Hospital), 410005, Changsha, Hunan, People’s Republic of China

关键词: Osteoarthritis;    Inflammation;    ADAMTS12;    STAT1;    METTL3;    IGF2BP2;   

DOI  :  10.1186/s10020-023-00661-2

 received in 2022-09-20, accepted in 2023-05-01,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundOsteoarthritis (OA) is a degenerative joint disease with lacking effective prevention targets. A disintegrin and metalloproteinase with thrombospondin motifs 12 (ADAMTS12) is a member of the ADAMTS family and is upregulated in OA pathologic tissues with no fully understood molecular mechanisms.MethodsThe anterior cruciate ligament transection (ACL-T) method was used to establish rat OA models, and interleukin-1 beta (IL-1β) was administered to induce rat chondrocyte inflammation. Cartilage damage was analyzed via hematoxylin-eosin, Periodic Acid-Schiff, safranin O-fast green, Osteoarthritis Research Society International score, and micro-computed tomography assays. Chondrocyte apoptosis was detected by flow cytometry and TdT dUTP nick-end labeling. Signal transducer and activator of transcription 1 (STAT1), ADAMTS12, and methyltransferase-like 3 (METTL3) levels were detected by immunohistochemistry, quantitative polymerase chain reaction (qPCR), western blot, or immunofluorescence assay. The binding ability was confirmed by chromatin immunoprecipitation-qPCR, electromobility shift assay, dual-luciferase reporter, or RNA immunoprecipitation (RIP) assay. The methylation level of STAT1 was analyzed by MeRIP-qPCR assay. STAT1 stability was investigated by actinomycin D assay.ResultsThe STAT1 and ADAMTS12 expressions were significantly increased in the human and rat samples of cartilage injury, as well as in IL-1β-treated rat chondrocytes. STAT1 is bound to the promoter region of ADAMTS12 to activate its transcription. METTL3/ Insulin-like growth factor 2 mRNA-binding protein 2 (IGF2BP2) mediated N6-methyladenosine modification of STAT1 promoted STAT1 mRNA stability, resulting in increased expression. ADAMTS12 expression was reduced and the IL-1β-induced inflammatory chondrocyte injury was attenuated by silencing METTL3. Additionally, knocking down METTL3 in ACL-T-produced OA rats reduced ADAMTS12 expression in their cartilage tissues, thereby alleviating cartilage damage.ConclusionMETTL3/IGF2BP2 axis increases STAT1 stability and expression to promote OA progression by up-regulating ADAMTS12 expression.

【 授权许可】

CC BY   
© The Author(s) 2023

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