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Updated: Nov 3, 2025
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Published on: February 27, 2011
The mouse double minute 2 309T>G polymorphism and retinoblastoma risk: A meta-analysis
K Sooraj1, Sunil Kumar1, Amit Kumar2
1Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
Purpose:
Mouse double minute 2 (MDM2) homolog is a protein that in humans is encoded by the MDM2 gene. It is expressed in retinoblastoma (Rb) cells and acts as a key negative regulator of the p53 tumor suppressor gene. Several studies have investigated the association of Rb with MDM2 309T>G polymorphism, but the results were conflicting. To derive a more precise estimation of the association, we performed a meta-analysis of the relationship between MDM2 309T>G polymorphism with Rb in all published studies.
Methods:
Published literature from PubMed and other databases were retrieved. All the reported studies evaluating the association between MDM2 309T>G polymorphism and Rb risk were included. The pooled odds ratio (OR) and 95% confidence interval (CI) were calculated using the fixed-effect model. A total of four case-control studies, including 520 cases and 745 controls were included.
Results:
This meta-analysis found that MDM2 309T>G polymorphism was significantly associated with Rb risk in the dominant model, TG+GG versus TT (OR = 1.43, 95% CI = 1.11-1.84, P = 0.006).
Conclusion:
The present meta-analysis suggested that MDM2 309T>G polymorphism has a significant association with increased Rb risk.
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