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This dissertation, The Role of FoxD3 in Gestational Trophoblastic Disease by Ka-yue, Chiu, 招家裕, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Gestational trophoblastic disease (GTD) is arised from the neoplastic trophoblasts in placenta. Trophoblasts have the characteristic of proliferation and invasion. GTD is classified as partial hydatidiform mole (PHM), complete hydatidiform form mole (CHM), invasive hydatidiform mole (IHM), choriocarcinoma (CCA), placental site trophoblastic tumour (PSTT), epithelioid trophoblastic tumour (ETT), exaggerated placental site trophoblastic reaction (EPSR) and placental site nodule (PSN). HM has the potential to develop into malignant trophoblastic disease, and metastasis to other parts of body. FoxD3 gene belongs to Forkhead family. Its protein acts as embryonic stem cell transcription factor and plays an important role in neural crest and placenta development. Previous studies from our team have reported that other embryonic stem cell transcription factors, such as Nanog, Sox2 Oct4 and Stat3, are related with pathogenesis of GTD. This study aim is to investigate the protein expression profile of FoxD3 in different types of GTD using immunohistochemistry method. In this study, 70 formalin fixed paraffin embedded tissue blocks from 16 normal first trimester placenta, 38 CHM, 9 CCA, 5 PSTT and 2 ETT were retrieved. Paraffin sections were prepared and stained with FoxD3 antibody by using immunohistochemistry method. Compared with normal placentas, there was significantly increased expression of FoxD3 in trophoblasts of CM and PSTT (pTo conclude, FoxD3 was found to be over-expressed in GTD. FoxD3 may contribute to pathogenesis of GTD. Further investigations are needed to discover the relationship with other embryonic transcription factors and genes to improve the diagnosis, prognosis and treatment of GTD. DOI: 10.5353/th_b4833363 Subjects: Trophoblastic tumorsTranscription factors

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