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Open Access Research article

Polymorphisms in the hypoxia-inducible factor 1 alpha gene in Mexican patients with preeclampsia: A case-control study

Sonia Nava-Salazar1, Elly N Sánchez-Rodríguez1, C Adriana Mendoza-Rodríguez1, Carlos Moran2, Juan F Romero-Arauz2 and Marco A Cerbón2*

Author Affiliations

1 Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, México D.F. 04510, México

2 Hospital de Ginecología y Obstetricia 4, Luis Castelazo Ayala, Instituto Mexicano del Seguro Social, México D.F. 01090, México

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BMC Research Notes 2011, 4:68  doi:10.1186/1756-0500-4-68

Published: 17 March 2011

Abstract

Background

Although the etiology of preeclampsia is still unclear, recent work suggests that changes in circulating angiogenic factors play a key role in its pathogenesis. In the trophoblast of women with preeclampsia, hypoxia-inducible factor 1 alpha (HIF-1α) is over-expressed, and induces the expression of non-angiogenic factors and inhibitors of trophoblast differentiation. This observation prompted the study of HIF-1α and its relation to preeclampsia. It has been described that the C1772T (P582S) and G1790A (A588T) polymorphisms of the HIF1A gene have significantly greater transcriptional activity, correlated with an increased expression of their proteins, than the wild-type sequence. In this work, we studied whether either or both HIF1A variants contribute to preeclampsia susceptibility.

Results

Genomic DNA was isolated from 150 preeclamptic and 105 healthy pregnant women. Exon 12 of the HIF1A gene was amplified by PCR, and the genotypes of HIF1A were determined by DNA sequencing.

In preeclamptic women and controls, the frequencies of the T allele for C1772T were 4.3 vs. 4.8%, and the frequencies of the A allele for G1790A were 0.0 vs. 0.5%, respectively. No significant differences were found between groups.

Conclusion

The frequency of the C1772T and G1790A polymorphisms of the HIF1A gene is very low, and neither polymorphism is associated with the development of preeclampsia in the Mexican population.