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Related Experiment Video

Updated: Aug 6, 2025

Cholesterol Efflux Assay
07:54

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Published on: March 6, 2012

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HIV-1 Infection Promotes Cholesterol Aggregation by Inducing miR-33b-5p to Suppress ABCA1 Expression.

Qiang You1, Jialu Qiao1, Qian Peng1

  • 1Wuhan Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, China.

AIDS Research and Human Retroviruses
|March 16, 2023
PubMed
Summary

Human immunodeficiency virus type 1 (HIV-1) infection increases miR-33b-5p, a microRNA that targets ABCA1. This leads to abnormal lipid transport and accumulation in HIV-1 patients, offering new diagnostic and therapeutic targets.

Keywords:
ABCA1HIV-1lipid abnormalitiesmiRNA

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Area of Science:

  • Virology
  • Molecular Biology
  • Biochemistry

Background:

  • MicroRNAs are key regulators in virus-host interactions.
  • Dysregulation of lipid metabolism is observed in individuals with human immunodeficiency virus type 1 (HIV-1) infection.

Purpose of the Study:

  • To investigate the role of miR-33b-5p in HIV-1 infection.
  • To elucidate the mechanism of altered lipid transport in HIV-1-infected cells.

Main Methods:

  • Quantification of miR-33b-5p expression in HIV-1-infected cell lines and human serum.
  • Analysis of ATP-binding cassette transporter (ABCA1) levels in HIV-1-infected cells.
  • Assessment of lipid transport and accumulation in macrophages.
  • Evaluation of the effects of an miR-33b-5p inhibitor.

Main Results:

  • miR-33b-5p expression was significantly elevated in HIV-1-infected cells and serum.
  • ABCA1 levels were reduced in HIV-1-infected cells, with miR-33b-5p identified as a direct target.
  • HIV-1 infection induced aberrant lipid transport and intracellular lipid accumulation in macrophages.
  • Treatment with an miR-33b-5p inhibitor reversed these lipid metabolism abnormalities.

Conclusions:

  • HIV-1 infection upregulates miR-33b-5p, which downregulates ABCA1, leading to impaired lipid transport.
  • This miR-33b-5p/ABCA1 pathway represents a novel mechanism contributing to poor lipid metabolism in HIV-1.
  • Targeting miR-33b-5p offers a potential therapeutic strategy for managing lipid disorders in individuals with HIV-1.