PMID- 36244795 OWN - NLM STAT- MEDLINE DCOM- 20221018 LR - 20221018 IS - 1880-313X (Electronic) IS - 0388-6107 (Linking) VI - 43 IP - 5 DP - 2022 TI - Activation of STAT3 (signal transducer and activator of transcription 3) in synovial tissues from the hip joint in the early stage of rapidly destructive coxopathy. PG - 173-180 LID - 10.2220/biomedres.43.173 [doi] AB - Interleukin-6 signaling activates signal transducer and activator of transcription 3 (STAT3), resulting in matrix metalloproteinase-3 (MMP-3) production. The hip joints with rapidly destructive coxopathy (RDC) show rapid chondrolysis, probably by increased MMP-3. This study aimed to elucidate STAT3 activation in the synovial tissues with joint destruction in the early stage of RDC. Synovial tissues within 7 months from the disease onset were obtained from four RDC patients with femoral head destruction and high serum levels of MMP-3. RDC synovial tissues demonstrated the synovial lining hyperplasia with an increase of CD68-positive macrophages and CD3-positive T lymphocytes. STAT3 activation was found in the synovial tissues by immunohistochemistry using anti-phospho-STAT3 antibody. The majority of phospho-STAT3-positive cells were the synovial lining cells and exhibited negative expression of the macrophage or T cell marker. Treatment with CP690,550, a Janus Kinase inhibitor, resulted in a decrease in phospho-STAT3-positive cells, especially with high intensity, indicating effective suppression of STAT3 activation in RDC synovial tissues. Inhibitory effect of CP690,550 could work through the Janus Kinase/STAT3 axis in the synovial tissues in the early stage of RDC. Thus, STAT3 may be a potential therapeutic target for prevention of joint structural damage in RDC. FAU - Yasuda, Tadashi AU - Yasuda T AD - Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital. FAU - Hara, Shigeo AU - Hara S AD - Department of Pathology, Kobe City Medical Center General Hospital. FAU - Yamashita, Shinnosuke AU - Yamashita S AD - Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital. FAU - Mitsuzawa, Sadaki AU - Mitsuzawa S AD - Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital. FAU - Tsukamoto, Yoshihiro AU - Tsukamoto Y AD - Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital. FAU - Takeuchi, Hisataka AU - Takeuchi H AD - Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital. FAU - Ota, Satoshi AU - Ota S AD - Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital. FAU - Onishi, Eijiro AU - Onishi E AD - Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital. LA - eng PT - Journal Article PL - Japan TA - Biomed Res JT - Biomedical research (Tokyo, Japan) JID - 8100317 RN - 0 (Interleukin-6) RN - 0 (Janus Kinase Inhibitors) RN - 0 (STAT3 Transcription Factor) RN - 0 (STAT3 protein, human) RN - EC 2.7.10.2 (Janus Kinases) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) SB - IM MH - Hip Joint MH - Humans MH - Interleukin-6 MH - *Janus Kinase Inhibitors MH - Janus Kinases MH - *Matrix Metalloproteinase 3 MH - STAT3 Transcription Factor/genetics EDAT- 2022/10/17 06:00 MHDA- 2022/10/19 06:00 CRDT- 2022/10/16 21:23 PHST- 2022/10/16 21:23 [entrez] PHST- 2022/10/17 06:00 [pubmed] PHST- 2022/10/19 06:00 [medline] AID - 10.2220/biomedres.43.173 [doi] PST - ppublish SO - Biomed Res. 2022;43(5):173-180. doi: 10.2220/biomedres.43.173.