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BACE1-AS prevents BACE1 mRNA degradation through the sequestration of BACE1-targeting miRNAs

Tao Zeng1, Haitao Ni1, Yue Yu2

  • 1Research Center of Developmental Biology, Second Military Medical University, Shanghai, 200433, China.

Journal of Chemical Neuroanatomy
|April 9, 2019
PubMed

Insights

Long noncoding RNA BACE1-AS acts as a competing RNA (ceRNA) in Alzheimer's disease (AD). It regulates beta-secretase 1 (BACE1) by sequestering microRNAs, impacting amyloid plaque formation in AD.

Area of Science:

  • Molecular Biology
  • Neuroscience
  • Genetics

Background:

  • Abnormal long noncoding RNAs (lncRNAs) and microRNAs (miRNAs) are implicated in Alzheimer's disease (AD) pathophysiology.
  • The role of interactions between lncRNAs and miRNAs in AD pathogenesis is not fully understood.
  • Beta-secretase 1 (BACE1), crucial for amyloid plaque formation in AD, is regulated by BACE1-AS and certain miRNAs.

Purpose of the Study:

  • To investigate the functional interaction between BACE1-AS and miRNAs in the context of AD.
  • To elucidate the mechanism by which BACE1-AS influences BACE1 expression.
  • To explore the role of BACE1-AS as a competing endogenous RNA (ceRNA) in AD.

Main Methods:

  • Analysis of miRNA-response elements shared between BACE1-AS and BACE1.
  • Experimental manipulation of BACE1-AS levels (overexpression and knockdown).
  • Assessment of miRNA levels and BACE1 mRNA degradation.

Main Results:

  • BACE1-AS shares miRNA-response elements with BACE1.
  • Overexpression of BACE1-AS represses miRNAs targeting BACE1, stabilizing BACE1 mRNA.
  • Knockdown of BACE1-AS increases miRNA levels, reducing BACE1 expression, confirming BACE1-AS acts as a ceRNA.

Conclusions:

  • BACE1-AS functions as a ceRNA, indirectly regulating BACE1 by sequestering miRNAs.
  • BACE1-AS influences BACE1 stability through RNA duplex formation and ceRNA activity.
  • BACE1 is proposed to be a ceRNA, forming a regulatory network with genes, lncRNAs, and miRNAs in AD pathophysiology.
Keywords:
Alzheimer’s diseaseBACE1BACE1-ASLong noncoding RNA (lncRNA)β-amyloid (Aβ)

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