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Investigation of MicroRNA Expression in Anterior Lens Capsules of Senile Cataract Patients and MicroRNA Differences
Yu Jeong Kim1, Won June Lee1, Byoung-Woo Ko2
1Department of Ophthalmology, Hanyang University Hospital, Hanyang University College of Medicine, Seoul, Republic of Korea.
Purpose:
We investigated the microRNAs (miRNAs) expression in the anterior lens capsules of patients with senile cataract and compared it to that in the anterior lens capsules of healthy controls. Moreover, we compared the differences in miRNAs expression according to the types of cataracts.
Methods:
Individual lens epithelium samples were collected from 33 senile patients and 10 controls. The cataract patients were classified into cortical, nuclear, posterior and anterior subcapsular and mixed. The expression of 12 different miRNAs in lens epithelium was measured using real-time polymerase chain reaction and compared between the senile cataract patients and controls. The differences of miRNA levels according to cataract type were analyzed.
Results:
The expression levels of let-7g-5p, miR-23a-3p, miR-23b-3p, and miR-125a-5p were significantly upregulated in patients with senile cataract when compared with those in the control group (P < 0.05). The expressions of let-7a-5p, let-7d-5p, miR-16-5p and miR-22-3p were significantly downregulated in the senile cataracts (P < 0.05). Let-7a-5p, let-7d-5p, let-7g-5p and mir-23b-3p had significant difference in expression between nuclear and anterior subcapsular cataracts.
Conclusions:
The eight differentially expressed miRNAs may be involved in the pathogenesis of senile cataract, in particular, related to oxidative stress and autophagy.
Translational Relevance:
We infer that several miRNAs in lens epithelial cells are promising candidate biomarkers of senile cataracts.
Insights
MicroRNAs (miRNAs) are differentially expressed in senile cataracts, with eight specific miRNAs showing significant changes. These miRNAs may serve as biomarkers for cataract development and progression.
Area of Science:
- Ophthalmology
- Molecular Biology
- Genetics
Background:
- Senile cataract is a leading cause of vision impairment globally.
- MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression and are implicated in various diseases.
- Understanding the role of miRNAs in cataractogenesis is crucial for developing novel therapeutic strategies.
Purpose of the Study:
- To investigate the differential expression of miRNAs in the anterior lens capsules of patients with senile cataract compared to healthy controls.
- To analyze variations in miRNA expression across different types of senile cataracts.
Main Methods:
- Lens epithelium samples were collected from 33 senile cataract patients and 10 controls.
- miRNA expression was quantified using real-time polymerase chain reaction (RT-PCR).
- Statistical analyses were performed to compare miRNA levels between groups and cataract types.
Main Results:
- Eight miRNAs (let-7g-5p, miR-23a-3p, miR-23b-3p, miR-125a-5p, let-7a-5p, let-7d-5p, miR-16-5p, miR-22-3p) showed significant differential expression in senile cataracts.
- let-7g-5p, miR-23a-3p, miR-23b-3p, and miR-125a-5p were upregulated, while let-7a-5p, let-7d-5p, miR-16-5p, and miR-22-3p were downregulated.
- Specific miRNAs (let-7a-5p, let-7d-5p, let-7g-5p, mir-23b-3p) exhibited distinct expression patterns between nuclear and anterior subcapsular cataracts.
Conclusions:
- The identified eight differentially expressed miRNAs are potentially involved in the pathogenesis of senile cataract, possibly through mechanisms like oxidative stress and autophagy.
- These miRNAs represent promising candidate biomarkers for senile cataracts, aiding in early detection and understanding disease mechanisms.
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