Similarities and differences between rat and mouse chondrocyte gene expression induced by IL-1β

Journal of Orthopaedic Surgery and Research

Zeng-Qiao Zhang¹  Jian-Guang Xu²  Jun-Peng Zhang²  Wen-Yao Li²  Dao-Fang Ding²  Yan Xue³  Yue-Long Cao⁴ 

[1] Center of Rehabilitation Medicine, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, 200437, Shanghai, China;School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China;Center of Rehabilitation Medicine, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, 200437, Shanghai, China;Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Centre), Tongji University School of Medicine, 201613, Shanghai, China;Shi’s Center of Orthopedics and Traumatology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 201203, Shanghai, China;

关键词: Osteoarthritis;    Chondrocyte inflammatory model;    RNA-seq, Differentially expressed gene;    Proliferation;   

DOI  :  10.1186/s13018-021-02889-2

来源: Springer

【 摘 要 】

BackgroundOsteoarthritis (OA) is the most prevalent degenerative joint disease. In vitro experiments are an intuitive method used to investigate its early pathogenesis. Chondrocyte inflammation models in rats and mice are often used as in vitro models of OA. However, similarities and differences between them in the early stages of inflammation have not been reported.ObjectiveThis paper seeks to compare the chondrocyte phenotype of rats and mice in the early inflammatory state and identify chondrocytes suitable for the study of early OA.MethodsUnder similar conditions, chondrocytes from rats and mice were stimulated using the same IL-1β concentration for a short period of time. The phenotypic changes of chondrocytes were observed under a microscope. The treated chondrocytes were subjected to RNA-seq to identify similarities and differences in gene expression. Chondrocytes were labelled with EdU for proliferation analysis. Cell proliferation-associated proteins, including minichromosome maintenance 2 (MCM2), minichromosome maintenance 5 (MCM5), Lamin B1, proliferating cell nuclear antigen (PCNA), and Cyclin D1, were analysed by immunocytochemical staining, cell immunofluorescence, and Western blots to verify the RNA-seq results.ResultsRNA-seq revealed that the expression patterns of cytokines, chemokines, matrix metalloproteinases, and collagen were similar between the rat and mouse chondrocyte inflammation models. Nonetheless, the expression of proliferation-related genes showed the opposite pattern. The RNA-seq results were further verified by subsequent experiments. The expression levels of MCM2, MCM5, Lamin B1, PCNA, and Cyclin D1 were significantly upregulated in rat chondrocytes (P < 0.05) and mouse chondrocytes (P < 0.05).ConclusionsBased on the findings, the rat chondrocyte inflammation model may help in the study of the early pathological mechanism of OA.

【 授权许可】

CC BY