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[Studies of effect of prosaposin on cell proliferation, cell apoptosis and its possible molecular mechanism]

Fen Guo1, Zhi-Wen Luo, Zhao-Yu Liu

  • 1National Engineering Research Center of Genetic Medicine, Jinan University, Guangzhou 510632, China. guofen_jnu@163.com

Yi Chuan = Hereditas
|January 1, 2010
PubMed

Insights

Prosaposin protein promotes cell growth and prevents apoptosis by activating the PI3K/Akt pathway. This pathway regulates genes involved in cell cycle progression and survival, offering insights into prosaposin

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Context:

  • Investigating the role of prosaposin in cellular processes.
  • Utilizing NIH3T3 cell strains as a model system.
  • Examining cellular responses under serum-starvation stress.

Purpose:

  • To elucidate the molecular mechanisms underlying prosaposin's effects on cell proliferation and apoptosis.
  • To determine if prosaposin influences the PI3K/Akt signaling pathway.

Summary:

  • Prosaposin activates the PI3K/Akt pathway, enhancing Akt phosphorylation at Serine 473.
  • It modulates downstream gene expression, including downregulation of P27(Kip1) and upregulation of Cyclin D1, promoting G1/S transition.
  • Prosaposin upregulates survival genes cIAP1 and cIAP2, thereby inhibiting apoptosis.

Impact:

  • Demonstrates prosaposin's growth-promoting and anti-apoptotic activities are partly mediated by the PI3K/Akt pathway.
  • Identifies key downstream targets of prosaposin signaling.
  • Provides a foundation for further research into prosaposin's therapeutic potential.

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