Immunohistochemical demonstration of CD31, HCG and receptors for estrogene on normal human placenta at term stage

Abstract

Introduction: The aim of the study was to investigate the localization of CD31, hCG and the receptors which are specific for estrogene in normal human placenta. Material and Methods: Sections from 10 normal human placenta were stained with Hematoksilen-Eozin, PAS ve Masson's trichrom stain and immunolabeled with the antibodies specific for HCG(Ab-5)(Lab Vision), CD31 (Diagnostic BioSystems) and human estrogene receptor s (Diagnostic BioSystems) . RESULTS: Antibodies specific for CD31 were localised in the fetal capillary endothelial cells's cytoplasm and the endothelial cells aroud the different types of vessels in Chorion. Syncythyotrophoblasts were immunostained with hCG. There were also immunolabeling in the cytoplasm of mesenchimal cells in villi, and in some cells in chorion. Labeling for the receptors specific for Estrogene were localised in the cytoplasm of syncythiotrophoblasts, in mesenchimal cells in villi and the cytoplasm of the connective tissue cells in chorion. Conclusions: We conclude that new vessel formation is not common in villi in term placenta since immunolabeling with CD31 in mesenchimal cells at this location were not seen. Mesenchimal cells which were stained with hCG might be the cells which synthesize and secrete HCG, like syncythyotrophoblasts, or they might be primitive cells which have potential for differentiation into the cyncythiotrophoblasts. Cells labeled with the estrogene receptor specific antibodies in mesenchimal cells in chorion and in villi would be the precursor cells of syncythiotrophoblasts or other cell types carrying these type receptors.

Keywords

• Antigens, CD31,Immunohistochemistry,Estrogens,Immunoenzyme Techniques,Chorionic Gonadotropin

Normal gelişimini tamamlamış insan plasentasında CD31, HCG ve estrojene spesifik reseptörlerin immunohistokimyasal yöntemlerle gösterilmesi

Öz

Çalışmada; CD31, hCG ve Estrojene spesifik reseptörlerin normal gelişimini tamamlamış insan plasentasındaki lokalizasyonunun araştırılması amaçlandı. Materyal ve Metod: 10 adet insan plasentasından hazırlanan kesitler; Hematoksilen-Eozin, PAS ve Masson 'un trikrom boyaları ile boyandı. Ardından; HCG(Ab-5)(Lab Vision), CDS I (Diagnostic BioSystems), insan estrojen reseptörüne spesifik antikorlar (Diagnostic BioSystems) ile indirekt immunoperoksidaz yöntemi kullanılarak işaretlendi. Bulgular: CD31 ile; fetal kapillerleri döşeyen endotelyal hücre sitoplazmaları ile; koryon içerisindeki kapillerler ve diğer tüm damarsal yapıları çevreleyen endotel hücreleri işaretlendi. Sinsityotrofoblastlar hCG ile belirgin şekilde boyandı. Villuslar içerisinde; yer yer sitoplazmaları hCG ile işaretlenmiş mezenkimal hücreler gözlendi. Koryon içerisinde de sitoplazması boyanmış hücrelere rastlandı. Estrojene spesifik reseptörlerle; sinsityotrofoblast sitoplazmalannda, villuslar içindeki mezenkimal hücrelerin bir kısmında, koryon kesitlerinde bazı bağ dokusu içerisindeki hücrelerin sitoplazmalannda işaretlenme mevcuttu. Tartışma: CD31 ile villuslar içerisinde lokalize mezenkimal hücrelerde işaretlenme gözlemleyememiz; yeni damar oluşumunun artık son dönem plasentada stimüle edilmediğini düşündürmektedir. hCG ile boyanmış mezenkimal hücrelerin varlığı bu hücrelerin; sinsityotrofoblastlar gibi hCG sentezleyip salgılayan hücreler ya da sinsityotrofoblastlar a farklılaşma potansiyeline sahip öncül hücreler olabileceği kanısındayız.Estrojen reseptörüne spesifik antikorla; koryon kesitlerinde ve villus içi mezenkimal hücrelerde gözlemlenen boyanma; sinsityotrofoblastlara dönüşmek üzere programlanmış hücreler veya bu reseptörleri taşıyan diğer tipteki hücreler olabileceklerini düşündürmektedir.

Anahtar Kelimeler

• Antijenler, CD31,İmmünohistokimya,Östrojenler,İmmunoenzim teknikleri,Koryonik gonadotropin

Kaynakça

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