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Transcriptome-wide piRNA profiling in human brains for aging genetic factors.

Qiao Mao1, Longhua Fan2, Xiaoping Wang3

  • 1Department of Psychosomatic Medicine, People's Hospital of Deyang City, Deyang, Sichuan 618000, China.

Jacobs Journal of Genetics
|March 10, 2020
PubMed
Summary
This summary is machine-generated.

Piwi-interacting RNAs (piRNAs) are linked to human aging. This study found ten specific piRNAs significantly correlate with age, suggesting a role in survival and aging processes.

Keywords:
Alzheimer’s diseaseagingbraingene expressionpiRNAtransposable elements (TEs)years of survival

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Area of Science:

  • Molecular Biology
  • Genetics
  • Aging Research

Background:

  • Piwi-interacting RNAs (piRNAs) are crucial in non-aging systems like germline and cancer stem cells, maintaining genomic integrity.
  • These potentially immortal cells share piRNAs, prompting investigation into their role in human aging.

Purpose of the Study:

  • To test the hypothesis that piRNAs are a critical genetic determinant of human aging.
  • To explore the association between piRNA expression and chronological age in the human brain.

Main Methods:

  • Transcriptome-wide piRNA expression profiling of 24,000 piRNAs in the human prefrontal cortex from 12 elderly individuals (68-100 years).
  • Microarray technology was employed to quantify piRNA levels.
  • Statistical analysis examined correlations between piRNA expression and age, adjusting for covariates like disease status.

Main Results:

  • A total of 9,453 piRNAs were detected in the brain samples.
  • Ten piRNAs, including seven intergenic and three intronic, showed a significant association with age (p ≤ 9.9×10⁻⁵).
  • Correlation coefficients (|r|) reached up to 0.9, indicating a strong relationship.

Conclusions:

  • Piwi-interacting RNAs (piRNAs) may play a significant role in determining human lifespan and aging.
  • Potential mechanisms include the suppression of transposable elements and regulation of aging-associated genes.