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POLE/POLD1 mutation and tumor immunotherapy.

Xiaoting Ma1, Lin Dong2, Xiu Liu1

  • 1Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.

Journal of Experimental & Clinical Cancer Research : CR
|July 2, 2022
PubMed
Summary

Mutations in DNA polymerases POLE/POLD1 impair proofreading, leading to gene mutations and cancer. These POLE/POLD1 mutations are key for understanding tumor development and predicting immunotherapy response.

Keywords:
Immune checkpoint inhibitorMSIPOLD1POLETumorTumor mutation burden

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Area of Science:

  • Molecular Biology
  • Genetics
  • Oncology

Background:

  • POLE and POLD1 genes encode subunits of DNA polymerases essential for replication and proofreading.
  • Mutations in the exonuclease domains of POLE/POLD1 disrupt DNA proofreading, causing genetic instability.
  • This genetic instability is linked to cancer development and progression.

Purpose of the Study:

  • To review the function of POLE/POLD1.
  • To explore the relationship between POLE/POLD1 mutations and DNA mismatch repair/microsatellite instability.
  • To examine the role of POLE/POLD1 mutations in various tumor types.

Main Methods:

  • Literature review of studies on POLE/POLD1 function and mutations.
  • Analysis of the association between POLE/POLD1 mutations, microsatellite instability, and tumor development.
  • Review of clinical research on POLE/POLD1 mutations as biomarkers.

Main Results:

  • POLE/POLD1 mutations lead to loss of proofreading and accumulation of mutations.
  • These mutations are associated with ultra-high mutation loads.
  • POLE/POLD1 mutations are implicated in the pathogenesis of diverse cancers.

Conclusions:

  • POLE/POLD1 mutations are critical in DNA replication and repair.
  • They represent potential biomarkers for predicting immunotherapy efficacy.
  • Understanding POLE/POLD1's role is vital for cancer research and treatment.