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06:48

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Published on: September 18, 2013

α-Mannosidase 2C1 attenuates PTEN function in prostate cancer cells

Lizhi He1, Catherine Fan, Anil Kapoor

  • 1Division of Nephrology, Department of Medicine, McMaster University, Hamilton, Ontario, Canada L8N 4A6.

Nature Communications
|May 11, 2011
PubMed

Insights

Alpha-mannosidase 2C1 (MAN2C1) inhibits phosphatase and tensin homolog (PTEN) function in prostate cancer cells. MAN2C1 promotes tumor growth by activating AKT signaling, highlighting its role as a PTEN-negative regulator.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • PTEN dephosphorylates phosphatidylinositol 3,4,5 triphosphate (PIP(3)), inhibiting AKT activation.
  • PTEN dysfunction is crucial in tumorigenesis, but mechanisms remain unclear.

Purpose of the Study:

  • To investigate the role of alpha-mannosidase 2C1 (MAN2C1) in regulating PTEN function in prostate cancer (PC).

Main Methods:

  • Investigated MAN2C1's effect on PTEN in PC cells and patient samples.
  • Analyzed PTEN and AKT activation in relation to MAN2C1 expression.
  • Examined MAN2C1-PTEN interaction and its impact on PIP(3) phosphatase activity.

Main Results:

  • MAN2C1 inhibits PTEN function and activates AKT in PC cells.
  • MAN2C1 overexpression correlates with PTEN-positive tumors and PC recurrence.
  • MAN2C1 binds PTEN, impairing its PIP(3) phosphatase activity.

Conclusions:

  • MAN2C1 acts as a PTEN-negative regulator in prostate cancer.
  • MAN2C1 promotes tumor growth by inhibiting PTEN and activating AKT.
  • MAN2C1 is a potential therapeutic target in PTEN-positive prostate cancer.

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