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Microfibrillar-associated protein 5 suppresses adipogenesis by inhibiting essential coactivator of PPARγ

Tianlong Zhang1,2, Haoran Li1,3, Shiwei Sun1,2

  • 1Department of Orthopedics, Shanghai Fifth People's Hospital, Fudan University, No128. Ruili Road, Minhang District, Shanghai, 200240, China.

Scientific Reports
|April 5, 2023
PubMed

Insights

Microfibril-Associated Protein 5 (MFAP5) is crucial in regulating bone marrow stem cell differentiation, impacting femoral head necrosis. This study reveals MFAP5

Area of Science:

  • * Molecular Biology
  • * Stem Cell Biology
  • * Orthopedics

Background:

  • * Femoral head necrosis, a painful condition with increasing incidence, is linked to abnormal adipogenic differentiation of bone marrow mesenchymal stem cells.
  • * This differentiation increases intramedullary pressure, potentially causing osteonecrosis.
  • * The specific role of Microfibril-Associated Protein 5 (MFAP5) in this process was previously unknown.

Purpose of the Study:

  • * To elucidate the regulatory role of MFAP5 in adipogenic differentiation of bone marrow mesenchymal stem cells.
  • * To identify the molecular mechanisms by which MFAP5 influences adipogenesis.
  • * To provide a theoretical foundation for novel therapeutic strategies targeting osteonecrosis.

Main Methods:

  • * Gene expression analysis before and after adipogenic differentiation.
  • * Knockdown and overexpression of MFAP5 in C3H10 and 3T3-L1 cell lines.
  • * Investigation of MFAP5's interaction with Staphylococcal Nuclease And Tudor Domain Containing 1 (SNTG1).

Main Results:

  • * MFAP5 expression was significantly down-regulated during adipogenic differentiation.
  • * MFAP5 acts as a key regulator in adipogenesis.
  • * MFAP5 directly binds to and inhibits SNTG1, a critical coactivator of PPARγ, thereby modulating adipogenesis.

Conclusions:

  • * MFAP5 plays a significant role in regulating adipogenic differentiation.
  • * The MFAP5-SNTG1 interaction is a key molecular mechanism controlling adipogenesis.
  • * Understanding MFAP5's function offers potential therapeutic targets for femoral head necrosis.

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