JOURNAL ARTICLE

Effects of MTHFR c.677C>T, F2 c.20210G>A and F5 Leiden Polymorphisms in Gastroschisis

Akhmad Makhmudi, Ahmad Hamim Sadewa, Teguh Aryandono, Sumantra Chatterjee, Hugo A Heij, Gunadi
Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research 2016, 29 (2): 88-92
26375922

BACKGROUND: Gastroschisis is a developmental disorder involving the extrusion of fetal intestines through a defect in the abdominal wall. The mechanism is presumed to be a dual vascular/thrombotic pathogenesis, where normal right umbilical vein involution forms a possible site for thrombosis adjacent to the umbilical ring.

PURPOSE: The aim of this study was to demonstrate that the 3 common prothrombotic polymorphisms, MTHFR c.677C>T, F2 c.20210G>A, and F5 Leiden, were elevated in frequency in Indonesian gastroschisis patients.

MATERIAL AND METHODS: Three genetic markers were investigated in 46 patients with gastroschisis and 89 ethnicity-matched controls for association studies using polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLP) or TaqMan Genotyping Assays on genomic DNA.

RESULTS: MTHFR c.677C>T showed a significant association with gastroschisis (OR = 2.1, 95% CI = 1.13-3.86; p = .018) but no affected infants had risk alleles for either F2 c.20210G>A or F5 Leiden. Further, the frequency of MTHFR risk allele (T) in patients with maternal age <25 years is marginally significant higher than those in cases with maternal age ≥25 years (p = .069) with an OR of 2.7 (95% CI = 0.90-8.07).

CONCLUSIONS: MTHFR is a common susceptibility factor for gastroschisis in Indonesia. The increased gastroschisis risk in offspring of younger maternal age suggests the thrombotic pathogenesis model. A founder effect is the most likely explanation for the rarity of the F2 and F5 Leiden polymorphisms in Indonesian population.

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