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Updated: Jul 25, 2025

miRNA Expression Analyses in Prostate Cancer Clinical Tissues
11:29

miRNA Expression Analyses in Prostate Cancer Clinical Tissues

Published on: September 8, 2015

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Long noncoding RNA MIAT regulates TP53 ubiquitination and expedites prostate adenocarcinoma progression by recruiting

Zheng Gong1, Huijing Zhang2, Yuntian Ge1

  • 1Department of Urology, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, PR China.

Biochimica Et Biophysica Acta. Molecular Cell Research
|June 25, 2023
PubMed

Insights

Myocardial infarction-associated transcript (MIAT) promotes immune evasion in prostate adenocarcinoma (PRAD) by downregulating TP53. Suppressing MIAT enhances CD8+ T cell response, offering a potential therapeutic target for PRAD.

Area of Science:

  • Oncology
  • Immunology
  • Molecular Biology

Background:

  • Cancer immunotherapy efficacy is limited in prostate adenocarcinoma (PRAD) due to immune evasion.
  • The role of long non-coding RNAs (lncRNAs) in PRAD immune evasion remains unclear.

Purpose of the Study:

  • To investigate the role of myocardial infarction-associated transcript (MIAT) in PRAD immune evasion.
  • To elucidate the underlying molecular mechanism of MIAT in PRAD.

Main Methods:

  • Analysis of MIAT expression in PRAD datasets and tissues.
  • In vitro and in vivo experiments involving MIAT knockdown and TP53/TBL1X manipulation.
  • Investigation of MIAT's interaction with transducin beta-like protein 1X (TBL1X) and its effect on TP53 ubiquitination.

Main Results:

  • MIAT is highly expressed in PRAD, correlating with poor prognosis and promoting malignant behavior.
  • MIAT depletion enhances CD8+ T cell response and reduces PRAD immune evasion.
  • MIAT downregulates TP53 by recruiting TBL1X for ubiquitination, a process critical for MIAT's oncogenic function.

Conclusions:

  • MIAT plays a significant role in PRAD immune evasion through the TBL1X/TP53 pathway.
  • Targeting MIAT presents a promising therapeutic strategy for enhancing anti-tumor immunity in PRAD.
Keywords:
Immune evasionLong noncoding MIATProstate adenocarcinomaTBL1XTP53

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