Browsing by Author "Cirpan T."

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    Evaluation of VEGF in placental bed biopsies from preeclamptic women by immunohistochemistry
    (2007) Cirpan T.; Akercan F.; Terek M.C.; Kazandi M.; Ozcakir H.T.; Giray G.; Sagol S.
    Objective: The aim of the study was to determine VEGF protein with immunohistochemical staining in placental bed biopsies of preeclamptic pregnancies in comparison to normal controls. Design: Prospective cohort study. Methods: The placental bed biopsies were obtained from 12 patients with preeclapmsia and ten patients for a control group at the time of cesarean delivery. Tissue samples of the placental bed were examined for VEGF protein distribution with avidin-biotin-peroxidase immunohistochemistry. Two blinded histopathologists were asked to score each sample for the intensity of staining and the number of cells stained in a randomly selected HPF of each sample. The resulting "H-score" was computed as a product of intensity and percent of cells stained. Results: VEGF expression was significantly lower in both the myometrium and stroma of the preeclamptic group compared to the control group (77.2 ± 25.4 vs 134 ± 44.3, p = 0.007; 194.1 ± 20.7 vs 170.2 ± 17, p = 0.017, respectively). Conclusion: VEGF expression is significantly lower in placental bed biopsies of preeclamptic pregnancies.
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    The immunohistochemical evaluation of VEGF in placenta biopsies of pregnancies complicated by preeclampsia
    (2008) Akercan F.; Cirpan T.; Terek M.C.; Ozcakir H.T.; Giray G.; Sagol S.; Karadadas N.
    Objective: The study was designed to determine the protein levels of vascular endothelial growth factor (VEGF) in the placenta biopsies of patients with preeclampsia and compare with normal controls. Design: Prospective cohort study. Methods: The placental biopsies were obtained from ten patients with preeclampsia and ten patients of control group at the time of delivery. Avidin-biotin-peroxidase immunohistochemistry was then performed to identify levels of VEGF protein within the tissue and a semi-quantitative method was devised to score the amount of staining present in the sample. Two histopathologists who were blinded to the groups were asked to score each sample for the intensity of staining and the number of cells stained in a randomly selected per high-power fields of each sample. The resulting "H-score" was computed as a product of intensity and percent of cells stained. Results: The VEGF expression was significantly higher in placenta biopsies of preeclamptic patients compared to that of controls (271.2 ± 22.65 vs. 201.9 ± 12.33, P = 0.000). Conclusion: Immunostaining of VEGF is significantly higher in placenta biopsies of patients with preeclampsia. © 2007 Springer-Verlag.