Objective:

To evaluate antioxidative and inflammatory gene and protein expression levels in a small interfering RNA (siRNA) PAX6 aniridia limbal epithelial cell model using CoCl₂ as a hypoxia trigger, highlighting the significance of PAX6 in ocular health.

Approach:

Key Findings:

• Congenital aniridia is linked to mutations in the PAX6 gene, affecting ocular development and leading to complications like aniridia-associated keratopathy (AAK), with specific alterations in gene expression noted.
• Chronic hypoxic stress in limbal epithelial cells contributes to inflammation and oxidative stress, exacerbating limbal stem cell deficiency, as evidenced by increased inflammatory markers.
• CoCl₂ serves as a practical model for inducing hypoxic conditions in vitro, allowing for the study of gene expression related to oxidative stress and inflammation, with implications for therapeutic strategies.

Interpretation:

The study highlights the role of hypoxia in the pathophysiology of aniridia and its impact on limbal epithelial dysfunction, emphasizing the need for further research on PAX6 regulatory pathways to develop targeted interventions.

Limitations:

• CoCl₂ does not fully replicate physiological hypoxia, which may limit the applicability of findings to in vivo conditions, potentially affecting the translation of results to clinical settings.
• The study's findings are based on an in vitro model, which may not fully capture the complexity of aniridia-related ocular conditions, suggesting caution in generalizing results.

Conclusion:

The research underscores the importance of understanding the molecular mechanisms underlying chronic hypoxia and inflammation in congenital aniridia, paving the way for future studies.

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