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ER stress in prostate cancer: A therapeutically exploitable vulnerability?

Christopher Logothetis1, Ana Aparicio2, Timothy C Thompson2

  • 1Department of Genitourinary Medical Oncology, MD Anderson Cancer Center, Houston, TX 77030, USA. clogothe@mdanderson.org.

Science Translational Medicine
|May 4, 2018
PubMed

Insights

Loss of PTEN and MYC overexpression cooperate to drive aggressive prostate cancer growth, overcoming endoplasmic reticulum stress and revealing a novel therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Prostate cancer progression is complex, involving genetic alterations.
  • Endoplasmic reticulum (ER) stress can impede tumor growth.
  • The roles of PTEN loss and MYC overexpression in aggressive prostate cancer require further elucidation.

Purpose of the Study:

  • To investigate the cooperative oncogenic effects of PTEN loss and MYC overexpression in prostate cancer.
  • To determine if these genetic alterations can overcome ER stress-induced growth inhibition.
  • To identify potential new therapeutic targets in aggressive prostate cancer.

Main Methods:

  • Utilizing genetically engineered mouse models.
  • Employing molecular biology techniques to assess gene expression and protein levels.
  • Analyzing tumor growth and response to stress conditions.

Main Results:

  • Cooperative loss of PTEN and MYC overexpression promotes aggressive prostate cancer growth.
  • These genetic changes effectively overcome the inhibitory effects of ER stress.
  • The interplay between PTEN, MYC, and ER stress highlights a new therapeutic vulnerability.

Conclusions:

  • The combined effect of PTEN loss and MYC overexpression is a potent driver of aggressive prostate cancer.
  • Targeting the pathways affected by these alterations may offer a novel therapeutic strategy.
  • Understanding the ER stress response in the context of these oncogenes is crucial for developing effective treatments.

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