Related Experiment Video

Updated: Feb 17, 2026

Detection of Small GTPase Prenylation and GTP Binding Using Membrane Fractionation and GTPase-linked Immunosorbent Assay
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Detection of Small GTPase Prenylation and GTP Binding Using Membrane Fractionation and GTPase-linked Immunosorbent Assay

Published on: November 11, 2018

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Rho GTPase effectors and NAD metabolism in cancer immune suppression

Mahmoud Chaker1, Audrey Minden2, Suzie Chen2

  • 1a Department of Oncology , Wayne State University School of Medicine, Karmanos Cancer Institute , Detroit , MI , USA.

Expert Opinion on Therapeutic Targets
|December 7, 2017
PubMed
Abstract

Insights

Cancer cells rely on sustained signaling and altered metabolism. This review explores how GTPase effector proteins like PAK4 and NAMPT influence immune responses, offering novel cancer immunotherapy targets.

Area of Science:

  • Oncology
  • Immunology
  • Molecular Biology

Background:

  • Cancer is characterized by uncontrolled cell growth driven by signaling pathways like Ras.
  • Altered cellular metabolism, specifically the Warburg effect, supports tumor proliferation and can promote immune suppression.
  • GTPases and their effectors play critical roles in various cellular processes, including proliferation and immune modulation.

Purpose of the Study:

  • To review the emerging roles of GTPase effector proteins, specifically p21 activated kinase 4 (PAK4) and nicotinamide phosphoribosyltransferase (NAMPT).
  • To highlight the involvement of these signaling molecules and metabolic enzymes in immune surveillance and response.
  • To propose novel immune therapeutic opportunities based on their roles in the tumor immune microenvironment.

Main Methods:

  • Literature review focusing on GTPase effector proteins and metabolic enzymes in cancer.
  • Analysis of existing research on PAK4 and NAMPT in the context of immune modulation.
  • Synthesis of information to identify potential therapeutic strategies.

Main Results:

  • GTPase effector proteins and metabolic enzymes significantly impact the immune microenvironment.
  • PAK4 and NAMPT are identified as key players in regulating immune surveillance and response.
  • Dysregulation of these molecules contributes to cancer progression and immune evasion.

Conclusions:

  • GTPases and metabolic enzymes represent promising targets for cancer immunotherapy.
  • Targeting PAK4 and NAMPT could enhance anti-tumor immunity and overcome immune suppression.
  • Further research into these pathways may unveil unique immune therapeutic strategies.
Keywords:
GTPaseNADNAMPTNAMPT inhibitorNAPRTP21 activated kinasesPAK4PAK4 inhibitorPD-1PD-L1Rasimmune checkpoint

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