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PTBP1-targeting microRNAs regulate cancer-specific energy metabolism through the modulation of PKM1/M2 splicing

Kohei Taniguchi1,2, Kazuhisa Uchiyama1, Yukihiro Akao3

  • 1Department of General and Gastroenterological Surgery, Osaka Medical College, Osaka, Japan.

Cancer Science
|October 18, 2020
PubMed

Insights

MicroRNAs (miRNAs) are crucial in cancer research due to their organ-specific roles. This review explores how miRNA dysregulation impacts polypyrimidine tract-binding protein 1 (PTBP1) and the Warburg effect in cancer.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Oncology

Background:

  • MicroRNAs (miRNAs) exhibit tissue and organ specificity, making them vital for physiological and cancer research.
  • The Warburg effect, characterized by enhanced glycolysis, is a hallmark of cancer cells.
  • Pyruvate kinase M1/2 (PKM1/2) are key glycolytic enzymes with organ-specific distribution, and PKM2 is often overexpressed in cancers.

Purpose of the Study:

  • To review the relationship between organ-specific miRNA distribution and Pyruvate Kinase (PKM) expression.
  • To examine the role of polypyrimidine tract-binding protein 1 (PTBP1) in PKM isoform generation.
  • To focus on how dysregulation of PTBP1-targeting miRNAs affects the Warburg effect in cancer.

Main Methods:

  • Literature review of studies on miRNA regulation, PTBP1, PKM isoforms, and the Warburg effect.
  • Analysis of the interplay between organ-specific miRNAs and PTBP1-mediated PKM2 production.
  • Discussion of miRNA targeting of PTBP1 and its consequences on cancer metabolism.

Main Results:

  • PTBP1 is essential for PKM2 production, and its regulation is influenced by miRNAs.
  • Organ-specific miRNAs play a role in controlling PKM expression.
  • Dysregulation of PTBP1-targeting miRNAs is linked to the Warburg effect in cancer.

Conclusions:

  • MiRNA's organ-specific nature is critical for understanding cancer metabolism.
  • PTBP1-mediated regulation of PKM isoforms by miRNAs is a key factor in the Warburg effect.
  • Targeting PTBP1-regulating miRNAs offers potential therapeutic strategies for cancer.
Keywords:
PKMPTBP1Warburg effectmicroRNAorgan-specificity

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