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Somatic human ZBTB7A zinc finger mutations promote cancer progression

X-S Liu1,2, Z Liu3, C Gerarduzzi1

  • 1Department of Genetics and Complex Diseases, Harvard School of Public Health, Boston, MA, USA.

Oncogene
|October 13, 2015
PubMed

Insights

Loss-of-function mutations in ZBTB7A, a gene repressing glycolysis, drive cancer by increasing tumor metabolism. This discovery offers new therapeutic targets for cancers with ZBTB7A mutations.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Metabolism

Background:

  • ZBTB7A acts as a transcription repressor for key glycolytic genes.
  • Downregulation of ZBTB7A is linked to altered tumor metabolism in human cancers.
  • Reduced ZBTB7A expression is observed in a subset of human cancers, prompting investigation into alternative inactivation mechanisms.

Purpose of the Study:

  • To identify alternative mechanisms of ZBTB7A inactivation in human cancers.
  • To investigate the functional consequences of ZBTB7A mutations.
  • To explore the role of ZBTB7A loss-of-function in cancer metabolism and proliferation.

Main Methods:

  • Mining human cancer genome databases for ZBTB7A mutations.
  • Functional characterization of ZBTB7A mutants, particularly those in the zinc finger domain.
  • Analysis of glycolytic gene expression, glycolysis rates, and cell proliferation in cancer cells with ZBTB7A mutations.

Main Results:

  • Recurrent somatic mutations in ZBTB7A were identified across multiple human cancer types.
  • Mutations were significantly enriched within the zinc finger domain of ZBTB7A.
  • Zinc finger mutations led to a complete loss of ZBTB7A function.
  • Upregulation of glycolytic genes, increased glycolysis, and enhanced proliferation were observed in cancer cells with ZBTB7A zinc finger mutations.

Conclusions:

  • Loss-of-function mutations in ZBTB7A represent a novel mechanism driving elevated glycolysis in human cancer.
  • ZBTB7A mutations, particularly in the zinc finger domain, contribute to tumorigenesis by promoting Warburg-like metabolism.
  • Targeting ZBTB7A inactivation pathways may offer new therapeutic strategies for specific cancer types.

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