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Dual mechanism of Let-7i in tumor progression

Jiapei Zhou1, Hongjie Xiang2, Zhiqun Cao1

  • 1First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China.

Frontiers in Oncology
|October 13, 2023
PubMed

Insights

Let-7i microRNA plays a dual role in cancer, regulating gene expression epigenetically and post-transcriptionally. It shows potential as a cancer biomarker and therapeutic target, influencing tumor progression and drug resistance.

Area of Science:

  • Molecular Biology
  • Genetics
  • Oncology

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression.
  • Let-7i, a specific miRNA, has been implicated in various biological processes.
  • Understanding Let-7i's role in cancer is crucial for developing new diagnostics and therapeutics.

Purpose of the Study:

  • To elucidate the multifaceted regulatory mechanisms of Let-7i in tumorigenesis.
  • To explore Let-7i's potential as a diagnostic and prognostic biomarker for cancer.
  • To investigate the therapeutic implications of Let-7i in cancer treatment.

Main Methods:

  • Analysis of Let-7i binding to mRNA 3' untranslated regions (3' UTRs) for post-transcriptional regulation.
  • Investigation of Let-7i's epigenetic function through DNA methylation modulation.
  • Assessment of Let-7i's impact on key cancer hallmarks including proliferation, migration, invasion, apoptosis, EMT, EV transmission, angiogenesis, autophagy, and drug resistance.

Main Results:

  • Let-7i exhibits a dual role in cancer, promoting or inhibiting malignancies based on its specific targets.
  • Let-7i influences critical cancer cell behaviors, affecting proliferation, migration, invasion, apoptosis, EMT, EV transmission, angiogenesis, autophagy, and drug resistance.
  • Let-7i is identified as a potential biomarker for cancer diagnosis and prognosis.

Conclusions:

  • Let-7i is a significant regulator in cancer, acting through both post-transcriptional and epigenetic mechanisms.
  • Let-7i's complex role highlights its potential as a versatile biomarker and therapeutic target.
  • Modulating Let-7i, potentially via exosome modification, could promote anti-cancer immune responses and exert tumor-suppressive effects.
Keywords:
Let-7icancerdual mechanisminhibitorpromoter

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