MicroRNA-328 may influence myopia development by mediating the PAX6 gene

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Ku-Chung Chen1, Edward Hsi, Ching-Yu Hu

  • 1Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.

Investigative Ophthalmology & Visual Science
|March 27, 2012
PubMed
Abstract

Insights

This study reveals that microRNA-328 binds to PAX6, influencing myopia development. Reducing microRNA-328 or retinoic acid may help prevent or treat myopia.

Area of Science:

  • Ophthalmology
  • Genetics
  • Molecular Biology

Background:

  • Single nucleotide polymorphism (SNP) rs662702 in PAX6 is linked to high myopia susceptibility.
  • PAX6's role and its interaction with microRNA-328 in myopia require further elucidation.

Purpose of the Study:

  • To investigate the functional relationship between PAX6, microRNA-328, and myopia.
  • To confirm microRNA-328 binding to the PAX6 locus and assess the impact of SNP rs662702 alleles.

Main Methods:

  • Luciferase assay to confirm microRNA-328 binding to PAX6.
  • Analysis of PAX6 knockdown effects on retinal pigment epithelial (RPE) and scleral cells.
  • Assessment of retinoic acid (RA) effects on microRNA-328 expression.

Main Results:

  • MicroRNA-328 binds to wild-type PAX6 3' UTR, with differential allele response to SNP rs644242.
  • PAX6 down-regulation impacts RPE and scleral cell proliferation and extracellular matrix gene expression.
  • Retinoic acid dose-dependently increases microRNA-328, subsequently suppressing PAX6.

Conclusions:

  • Established a link between myopia, SNP rs662702, microRNA-328, and RA.
  • Suggests that reducing microRNA-328 and/or RA levels could be therapeutic strategies for myopia.

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