Your browser doesn't support javascript.
loading
Gene expression of Postn and FGF7 in canine chordae tendineae and their effects on flexor tenocyte biology.
Ren, Ye; Wan, Rou; Zhao, Gongyin; Kuroiwa, Tomoyuki; Moran, Steven L; Gingery, Anne; Zhao, Chunfeng.
Afiliação
  • Ren Y; Department of Orthopedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
  • Wan R; Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
  • Zhao G; Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
  • Kuroiwa T; Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
  • Moran SL; Department of Orthopedic Surgery, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, China.
  • Gingery A; Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
  • Zhao C; Division of Plastic Surgery, Department of Surgery, Mayo Clinic, Rochester, Minnesota, USA.
J Orthop Res ; 42(5): 961-972, 2024 May.
Article em En | MEDLINE | ID: mdl-37990927
Chordae tendineae, referred to as heart tendinous cords, act as tendons connecting the papillary muscles to the valves in the heart. Their role is analogous to tendons in the musculoskeletal system. Despite being exposed to millions of cyclic tensile stretches over a human's lifetime, chordae tendineae rarely suffer from overuse injuries. On the other hand, musculoskeletal tendinopathy is very common and remains challenging in clinical treatment. The objective of this study was to investigate the mechanism behind the remarkable durability and resistance to overuse injuries of chordae tendineae, as well as to explore their effects on flexor tenocyte biology. The messenger RNA expression profiles of chordae tendineae were analyzed using RNA sequencing and verified by quantitative reverse transcription polymerase chain reaction  and immunohistochemistry. Interestingly, we found that periostin (Postn) and fibroblast growth factor 7 (FGF7) were expressed at significantly higher levels in chordae tendineae, compared to flexor tendons. We further treated flexor tenocytes in vitro with periostin and FGF7 to examine their effects on the proliferation, migration, apoptosis, and tendon-related gene expression of flexor tenocytes. The results displayed enhanced cell proliferation ability at an early stage and an antiapoptotic effect on tenocytes, while treated with periostin and/or FGF7 proteins. Furthermore, there was a trend of promoted tenocyte migration capability. These findings indicated that Postn and FGF7 may represent novel cytokines to target flexor tendon healing. Clinical significance: The preliminary discovery leads to a novel idea for treating tendinopathy in the musculoskeletal system using specific molecules identified from chordae tendineae.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Transtornos Traumáticos Cumulativos / Tendinopatia Limite: Animals / Humans Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Transtornos Traumáticos Cumulativos / Tendinopatia Limite: Animals / Humans Idioma: En Ano de publicação: 2024 Tipo de documento: Article