Molecular Human Reproduction, Vol. 6, No. 3, 276-282,
March 2000
© 2000 European Society of Human Reproduction and Embryology
Pregnancy |
VEGF, its receptors and the Tie receptors in recurrent miscarriage
1 Department of Obstetrics and Gynecology, Helsinki University Central Hospital, PL 140, 00029 HYKS, 2 Department of Pathology, Haartman Institute, University of Helsinki, 00014 Helsinki, and 3 Family Federation of Finland, Helsinki, Finland
Abstract
The aetiology of recurrent miscarriage (at least three consecutive miscarriages) usually remains unsolved. The vascular endothelial growth factor (VEGF) family of proteins, together with their receptors and the Tie (tyrosine kinase with immunoglobulin and epidermal growth factor homology domains) receptors, are crucial for embryonic development. Therefore, we used immunohistochemistry to analyse the expression of VEGF, the VEGF receptors (VEGFR)-1, -2, and -3, and the Tie-1 and Tie-2 receptors in placental and decidual tissue of women with a history of recurrent miscarriage and missed abortion (MA; n = 12) or blighted ovum (BO; n = 6), and from normal early terminated pregnancies (n = 12). Compared with controls, the MA and BO groups showed: (i) diminished placental trophoblastic VEGF immunoreactivity; (ii) weaker VEGFR-1 and -2 immunoreactivity in decidual vascular endothelium; (iii) reduced placental trophoblastic Tie-1 receptor immunoreactivity; and (iv) reduced decidual vascular endothelial Tie-1 and -2 receptor immunoreactivity. The absence of VEGFR-3 immunoreactivity in decidual vascular endothelium was also noted in all study groups. Interestingly, placental villi from the BO group presented blood vessel-like structures negative for von Willebrand factor, but positive for VEGF, VEGFR-1, -2, -3, Tie-1 and Tie-2 receptor. We conclude that the expression of these antigens may be altered in recurrent miscarriages.
recurrent miscarriage/Tie receptors/VEGF/VEGF receptors
Notes
4 To whom correspondence should be addressed
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