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Single Nucleotide Polymorphisms-SNPs

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Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
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Yeast As a Chassis for Developing Functional Assays to Study Human P53
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Study on TP53 codon 72 polymorphisms with oral carcinoma susceptibility.

Xian-Lu Zhuo1, Qi Li, Yan Zhou

  • 1Department of Otolaryngology, Southwest Hospital, Third Military Medical University, Chongqing, China.

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|January 20, 2010
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Summary

TP53 codon 72 polymorphisms are not linked to oral cancer risk. This meta-analysis of nine studies found no significant association between TP53 genotypes and oral carcinoma susceptibility in diverse populations.

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Area of Science:

  • Genetics and Cancer Epidemiology
  • Molecular Oncology
  • Human Genetics

Background:

  • Previous studies suggest TP53 codon 72 polymorphisms may influence cancer risk.
  • Inconclusive evidence exists regarding the association between TP53 codon 72 polymorphisms and oral carcinoma susceptibility.

Purpose of the Study:

  • To precisely estimate the relationship between TP53 codon 72 polymorphisms and oral carcinoma risk.
  • To synthesize existing evidence through meta-analysis.

Main Methods:

  • Systematic literature search of relevant databases until May 2009.
  • Inclusion criteria applied to select nine studies comprising 1990 cases and 2074 controls.
  • Meta-analysis performed to assess the association between TP53 codon 72 genotypes and oral cancer risk.

Main Results:

  • No significant difference in oral cancer risk was observed for Arg/Arg genotype versus Pro/Pro genotype (OR: 0.96).
  • No significant risk was found for Arg/Arg genotype compared to combined Pro genotypes (OR: 0.98).
  • Combined Arg genotypes showed no increased or decreased susceptibility compared to Pro/Pro (OR: 1.00), irrespective of race, smoking status, or HPV infection.

Conclusions:

  • Current evidence does not support TP53 codon 72 polymorphisms as a risk factor for oral carcinoma.
  • The investigated TP53 genotypes do not appear to influence oral cancer susceptibility.