CDK6-Dependent, CDK4-Independent Synovial Hyperplasia in Arthritic Mice and Tumor Necrosis Factor-α-Induced Proliferation of Synovial Fibroblasts.

ABSTRACT: Palbociclib, a dual CDK4/6 kinase inhibitor used for breast cancer, has been explored as a treatment option for rheumatoid arthritis (RA). Preclinical studies have reported palbociclib-induced myelosuppression, but no such effects have been observed in Cdk4 or Cdk6 single-deficient mice. Synoviocyte proliferation-associated in collagen-induced arthritis 1/serum amyloid A-like 1 (SPACIA1/SAAL1) is involved in G1 phase progression. Given that SPACIA1/SAAL1 upregulates CDK6 (but not CDK4) expression, we aimed to determine whether suppressing CDK6 expression alone could prevent synovial hyperplasia without myelosuppression. The effects of CDK6 expression on TNF-α-induced rheumatoid arthritis synovial fibroblast (RASF) proliferation and synovial hyperplasia in collag

SUBMITTER: Komatsu R 

PROVIDER: S-EPMC11817658 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature