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      • Higher Asialoglyco Protein Receptor Expression on Pla-cental Cells Is Associated with Hepatitis B Virus Vertical Transmission from Mother to Baby

        ( Ashish Kumar Vyas ),( Sharda Patra ),( Archana Rastogi ),( Shiv Ku-mar Sarin ),( Nirupma Trehanpati ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1

        Aims: Vertical transmission of Hepatitis B virus (HBV) from infected mother to the newborn is the major cause of HBV chronicity. Asialoglycoprotein receptor (ASGPR) expression on hepatocytes has been associated with HBV entry and endocytosis. However, there is a big lacuna regarding expression of ASGPR expression on placental cells and its role in HBV vertical transmission. Methods: 34 HBsAg+ve and 13 healthy pregnant mothers were enrolled along with their newborns. QHBsAg, HBV DNA and liver-function-test were performed among the groups. HBsAg+ve women were grouped into transmitting and non-transmitting mothers on the basis of newborns HBsAg and HBVDNA. Expression of ASGPR and HBsAg were analyzed in placental tissue using Immunohistochemistry and immunofluorescence staining. Peripheral and cord blood-mononuclear cell together with dendritic cells (mDCs and pDCs) were analyzed for the expression of DC-ASGPR, using flow cytometry and QPCR in all subjects. Results: The incidence of HBV vertical transmission to the newborn was 18% among the HBsAg positive pregnant females. HBV transmitting mothers showed increased expression of ASGPR in trophoblasts of placenta. Immunofluorescence microscopy revealed co-localization of HBsAg and ASGPR in placenta as well as in DCs of HBV transmitting mothers. HBV transmitting mothers and their HBsAg+ve newborns showed increased mRNA levels of DC-ASGPR in PBMCS. However, flowcytometry revealed no significant difference in the expression of ASGPR on PBMCs or CBMCs cells between the 2 groups. The HBV transmitting mothers and their HBsAg+ve newborns also showed an increased expression of DC-ASGPR on both myeloid and plasmocytoid dendritic cells compared to HBV non-transmitting mothers and their HBsAg negative newborns. Conclusions: The present work highlights for the first time a role of ASGPR in the intrauterine mother to baby HBV transmission. Blocking of ASGPR appears to be novel therapeutic strategy for prevention of HBV mother to baby vertical transmission.

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