Related Experiment Video
Updated: May 18, 2026

Characterization and Functional Prediction of Bacteria in Ovarian Tissues
Published on: October 23, 2021
Cytochrome P1B1 (CYP1B1) polymorphisms and ovarian cancer risk: a meta-analysis
Ketan Gajjar1, Gemma Owens, Matthew Sperrin
1Centre for Biophotonics, Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom.
Abstract:
CYP1B1 is a key P450 enzyme involved in the metabolism of exogenous and endogenous substrates and plays a key role in hormone-induced carcinogenesis. Risk factors for ovarian cancer are related to hormonal exposure and reproduction, and polymorphisms within genes involved in metabolism of oestrogen and certain xenobiotics may influence the risk of developing ovarian cancer. Current meta-analysis evaluated four CYP1B1 polymorphisms (Leu432Val, Arg48Gly, Ala119Ser and Asn453Ser) for their association with ovarian cancer risk. A search of the MEDLINE bibliographic database for the period up to April 2012 identified five relevant studies. With regards to Leu432Val polymorphism, all of the five studies were eligible (1199 cases and 2596 controls) for analysis, while for Arg48Gly (799 cases and 1169 controls), Ala119Ser (799 cases and 1172 controls) and Asn453Ser (361cases and 1577 controls) only two studies were eligible for analysis. Fixed-effect models were used to estimate pooled odds ratios (OR) with 95% confidence intervals (95% CI) and chi-square based Q-test was used to test for heterogeneity. The pooled OR (95% CI) for CYP1B1_Leu432Val polymorphism were 1.1 (0.84-1.31) for heterozygous subjects and 0.82 (0.57-1.17) for homozygous Val subjects. In a recessive model, homozygous carriers of Leu432Val showed a weak trend towards reduced risk as compared to 'wild type' and heterozygous carriers (OR 0.8, 95% CI; 0.66-0.99); however, this association was of limited significance. Regarding Arg48Gly, the pooled OR (95% CI) were 1.06 (0.89-1.27) for heterozygous and 0.98 (1.72-1.33) for homozygous Gly subjects. With respect to Ala119Ser and Asn453Ser, the pooled OR were 1.06 (0.87-1.29) and 1.24 (0.94-1.63) for heterozygous and 1.1 (0.8-1.52) and 1.09 (0.5-2.34) for homozygous respectively. In conclusion, this meta-analysis suggests that CYP1B1 polymorphisms are not associated with ovarian cancer risk. Studies evaluating CYP1B1_Leu432Val polymorphism are required to further elucidate the risk of ovarian cancer with this polymorphism. Additionally, studies amongst Asian and African subjects are required to estimate race-specific effects.
More Related Videos
13:04In Vivo and Ex Vivo Approaches to Study Ovarian Cancer Metastatic Colonization of Milky Spot Structures in Peritoneal Adipose
Published on: October 14, 2015
09:40Tropomodulin 3 Overexpression as a Marker for Platinum Resistance and Immune Infiltration in Ovarian Cancer
Published on: August 2, 2024
Related Concept Videos
Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu
Pharmacogenetics of Drug Metabolism: Overview
Oogenesis
Chi-square Analysis
The chi-square test was developed by Pearson in 1990.
The first step of performing a Chi-square analysis is to establish a null hypothesis, which assumes that there is no real...
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase