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Journal of Clinical Immunology

Published in:

01-05-2009

Differential Expression of RDC1/CXCR7 in the Human Placenta

Authors: Vishwas Tripathi, Romsha Verma, Amit Dinda, Neena Malhotra, Jagdeep Kaur, Kalpana Luthra

Published in: Journal of Clinical Immunology | Issue 3/2009

Abstract

Introduction

Chemokine receptor expression by human trophoblast and other placental cells have important implications for understanding the regulation of placental growth, development, and their role in maternofetal HIV transmission. CXCR7, now a deorphanized G protein coupled receptor that has been recently shown to bind to the ligands ITAC and CXCL12 has been proposed to act as a co-receptor for HIV-1, HIV-2, and SIV strains. The differential expression of CXCR7 in the human placenta is not yet reported.

Methods

The expression of CXCR7 was studied in 45 different human placental tissues, of which 20 were from early placental tissues (8–10 week old) obtained from medically terminated pregnancies and 25 were placenta from normal term deliveries.

Results

Immunohistochemistry and RT-PCR analysis revealed a greater expression of CXCR7 in term human placenta as compared to the early stage. This was further confirmed by real-time PCR.

Conclusion

Our study reveals, for the first time, the differential expression of CXCR7 in early (8–10 weeks) and term human placenta. The precise role of CXCR7 in the human placenta needs to be determined. HIV vertical transmission is reported to occur mainly during the end stages of pregnancy. Our finding of increased CXCR7 expression in the term human placenta therefore warrants future studies to assess its role in the vertical transmission of HIV-1.

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Title: Differential Expression of RDC1/CXCR7 in the Human Placenta
Authors: Vishwas Tripathi
Romsha Verma
Amit Dinda
Neena Malhotra
Jagdeep Kaur
Kalpana Luthra
Publication date: 01-05-2009
Publisher: Springer US
Published in: Journal of Clinical Immunology / Issue 3/2009
Print ISSN: 0271-9142
Electronic ISSN: 1573-2592
DOI: https://doi.org/10.1007/s10875-008-9258-4

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