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Expression of lens-related microRNAs in transparent infant lenses and congenital cataract.
AIM: To identify the expression of lens-related microRNAs (miRNAs) in the central epithelium of transparent infant lenses and congenital cataract.
METHODS: Lens-related miRNAs were retrieved from PubMed database. The expression levels of these miRNAs in transparent infant lenses and congenital cataract were determined by stem-loop reverse transcription-polymerase chain reaction (RT-PCR). miRanda algorithm was used to predict the target genes of these differentially expressed miRNAs. The target mRNA was validated.
RESULTS: Six lens-related miRNAs were retrieved from screening PubMed database. The most abundant miRNA in transparent infant lenses according to stem-loop RT-PCR was miR-184. miR-182 was up-regulated in congenital cataract. Contrarily, miR-204 and miR-124 was down-regulated. miR-204 exhibited a more significant decrease in expression than miR-124. In addition, Meis2 was predicted to be the target of miR-204 using miRanda algorithm. miR-204 mimic/antagomir transfection experiments suggested the negative correlation between the expression of miR-204 and Meis2.
CONCLUSION: The expression levels of miR-182, miR-204 and miR-124 differ between the central epithelium of transparent infant lens and congenital cataract, suggesting their involvement in the pathogenesis of congenital cataract. miR-204 may act via silencing Meis2 to regulate lens development and congenital cataract formation.
METHODS: Lens-related miRNAs were retrieved from PubMed database. The expression levels of these miRNAs in transparent infant lenses and congenital cataract were determined by stem-loop reverse transcription-polymerase chain reaction (RT-PCR). miRanda algorithm was used to predict the target genes of these differentially expressed miRNAs. The target mRNA was validated.
RESULTS: Six lens-related miRNAs were retrieved from screening PubMed database. The most abundant miRNA in transparent infant lenses according to stem-loop RT-PCR was miR-184. miR-182 was up-regulated in congenital cataract. Contrarily, miR-204 and miR-124 was down-regulated. miR-204 exhibited a more significant decrease in expression than miR-124. In addition, Meis2 was predicted to be the target of miR-204 using miRanda algorithm. miR-204 mimic/antagomir transfection experiments suggested the negative correlation between the expression of miR-204 and Meis2.
CONCLUSION: The expression levels of miR-182, miR-204 and miR-124 differ between the central epithelium of transparent infant lens and congenital cataract, suggesting their involvement in the pathogenesis of congenital cataract. miR-204 may act via silencing Meis2 to regulate lens development and congenital cataract formation.
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