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MicrRNA-26a deficiency attenuates the severity of frozen shoulder in a mouse immobilization model

ABSTRACT: The main pathogenesis of the frozen shoulder is thought to be the inflammation of the intra-articular synovium and subsequent fibrosis of the shoulder joint capsule. However, the molecular pathogenesis of the frozen shoulder is still unknown. A class of non-coding RNAs, microRNAs (miRNAs) contribute to various diseases including musculoskeletal diseases. MicroRNA-26a (miR-26a) has been reported to be associated with fibrosis in several organs. This study aims to reveal the role of miR-26a on fibrosis in the shoulder capsule using a frozen shoulder model in miR-26a deficient (miR-26a KO) mice. MiR-26 KO and wild type (WT) mice were investigated using a frozen shoulder model. The range of motion of the shoulder, histopathological analysis such as synovitis, and fibrosis related-genes expression in the model mice were evaluated to determine the role of miR-26a. In WT mice, both inflammatory cell infiltration and thickening of the inferior shoulder joint capsule were observed after 1 week of immobilization, and this thickening further progressed over the subsequent 6 weeks. However, the immobilized shoulder in miR-26a KO mice consistently exhibited significantly better range of motion compared with WT mice at each point, and histological changes were notably less severe. The expression of inflammation- and fibrosis-related genes was decreased in the miR-26a KO mice compared with WT mice at 1 and 6 weeks. Together, miR-26a deficiency attenuated the severity of frozen shoulder in the immobilization model mouse. The present study suggests that miR-26a has the potential to be a target miRNA for therapeutic approach to frozen shoulder.

ORGANISM(S): Mus musculus

PROVIDER: GSE256308 | GEO | 2024/09/01

REPOSITORIES: GEO

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