Summary
Inherited thrombophilia could increase susceptibility to adverse pregnancy outcomes
such as fetal loss. We determined the G1691A mutation of the factorV gene (FVL), the
G20210A mutation of the prothrombin gene, the C677T polymorphism of the methylenetetrahydrofolate-reductase
(MTHFR) gene, the HPA-1 polymorphism of the β3 subunit of the platelet integrin αIIbβ3 and the C807T polymorphism of the α2 subunit of integrin α2 β1 in 104 women with fetal loss and 277 normal women. In a subgroup analysis of women
with recurrent early fetal loss (n=34), the prevalence of the genetic markers did not differ significantly between the women with early
fetal loss and the normal women. However, in this subgroup of patients the onset of
fetal loss was significantly earlier in women with the α2807TT genotype (7.1 ± 1.9 vs. 8.8 ± 1.5 weeks, p=0.001). No such significant difference
was observed in carriers of the other genetic markers. In the subgroup analysis of
women with late fetal loss (n=70), only the prevalence of heterozygous FVL was significantly
associated with late fetal loss (odds ratio 3.2, p=0.002). There was no significant
association of any genetic risk factor with premature fetal loss in the subgroup analysis
of women with at least one late miscarriage.This study demonstrates a significant
association of the α2 807TT genotype of the platelet membrane integrin α2β1 with premature onset of early fetal loss. It appears that this risk factor does not
induce the pathomechanism, but modulates the course of fetal loss. Furthermore, our
study confirms the association of FVL with late fetal loss.
Keywords
Fetal loss - platelet receptor polymorphisms - HPA-1/Pl
A
- α
IIbβ
3
- glycoprotein IIb-IIIa - α
2807TT genotype - α
2β
1
- glycoprotein Ia-IIa