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PTEN Inhibits High Glucose-Induced Phenotypic Transition in Podocytes

Lingling Xing1,2, Qingjuan Liu1, Shuxia Fu2

  • 1Department of Pathology, Hebei Medical University, Key Laboratory of Kidney Diseases of Hebei Province, Shijiazhuang, Hebei, 050017, China.

Journal of Cellular Biochemistry
|March 5, 2015
PubMed

Insights

High glucose activates the PTEN/PI3K/Akt pathway in kidney podocytes, driving diabetic nephropathy progression. Inhibiting this pathway prevents harmful cellular changes, offering potential therapeutic targets.

Area of Science:

  • Nephrology
  • Cell Biology
  • Molecular Biology

Background:

  • Diabetic nephropathy (DN) is a leading cause of kidney failure.
  • Podocyte injury, including epithelial-mesenchymal transition (EMT), is a hallmark of DN.
  • The precise molecular mechanisms driving podocyte EMT in DN remain unclear.

Purpose of the Study:

  • To investigate the role of the Phosphatidylinositol 3-kinase/Protein kinase B (PI3K/Akt) pathway in high glucose-induced podocyte EMT.
  • To identify key molecular players involved in this process.

Main Methods:

  • Cultured podocytes were exposed to high glucose conditions.
  • Activation of the PI3K/Akt pathway was assessed.
  • Expression levels of podocyte markers (podocalyxin, nephrin) and EMT markers (desmin, α-smooth muscle actin) were measured.
  • The effects of PI3K/Akt pathway inhibition (using LY294002 or PTEN) were evaluated.

Main Results:

  • High glucose activated the PI3K/Akt pathway in podocytes.
  • This activation correlated with decreased expression of podocalyxin and nephrin.
  • Concurrently, desmin and α-smooth muscle actin expression increased, indicating EMT.
  • Inhibition of the PI3K/Akt pathway using LY294002 or PTEN reversed these phenotypic changes.

Conclusions:

  • The PTEN/PI3K/Akt pathway is a critical mediator of high glucose-induced EMT in podocytes.
  • Targeting this pathway may offer a therapeutic strategy for diabetic nephropathy.
Keywords:
HIGH GLUCOSEPHENOTYPIC TRANSITIONPODOCYTESPTEN

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