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Title: Expression pattern alterations of the serine protease HtrA1 in normal human placental tissues and in gestational trophoblastic diseases
Issue Date: 2009
Publisher: Murcia : F. Hernández
ISSN: 0213-3911
Related subjects: 616 - Patología. Medicina clínica. Oncología
Keywords: Placenta
Abstract: HtrA1 is a secreted protein which behaves as a molecular chaperone at low temperatures and as a serine protease at high temperatures. When the placenta escapes the normal growth control mechanisms, which are present during normal pregnancy, it may develop trophoblastic diseases, such as hydatidiform mole and choriocarcinoma. The aim of the study is to investigate the expression of HtrA1 in these gestational trophoblastic diseases and evaluate whether different HtrA1 expression might be associated with increasingly severe forms of disease. We used immunohistochemistry to assess the expression of HtrA1 in normal human placenta, hydatidiform mole (partial and complete) and choriocarcinoma. In addition to that we used the western blotting technique to quantify HtrA1 immunoreaction in normal human placentas. The most striking finding of our investigation is the decrease in immunostaining of this protease with increasing severity of gestational trophoblastic disease. For instance, in partial and complete moles HtrA1 is weakly expressed in the trophoblast. Moreover, absence of immunoreaction for HtrA1 is observable in the choriocarcinoma cells. In conclusion, we suggest that HtrA1 may play an important role in the pathogenesis and progression of hydatidiform moles and choriocarcinomas, and that HtrA1 may play an important role during the normal development of the placenta, as well as in trophoblastic diseases.
Primary author: Marzioni, Daniela
Quaranta, Alexia
Lorenzi, Teresa
Morroni, Manrico
Crescimanno, Caterina
De Nictolis, Michele
Toti, Paolo
Muzzonigro, Giovanni
Baldi, A.
De Luca, Antonio
Castellucci, Mario
Published in: Histology and histopathology
Document type: info:eu-repo/semantics/article
Number of pages / Extensions: 10
Rights: info:eu-repo/semantics/openAccess
Appears in Collections:Vol.24,nº10 (2009)

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