Biol Reprod Keystone Symposia Conference on Frontiers in Reproductive Biology & Regulation of Fertility.
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BOR - Papers in Press, published online ahead of print October 12, 2005.
Biol Reprod 2005, 10.1095/biolreprod.105.045112
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BIOLOGY OF REPRODUCTION 74, 246–252 (2006)
DOI: 10.1095/biolreprod.105.045112
© 2006 by the Society for the Study of Reproduction, Inc.

Research Article

Risk Assessment of Mouse Hepatitis Virus Infection via In Vitro Fertilization and Embryo Transfer by the Use of Zona-Intact and Laser-Microdissected Oocytes1

Dominika D. Peters 3, Susan Marschall 3, Esther Mahabir 4, Auke Boersma 3, Ulrich Heinzmann 5, Jörg Schmidt 4, and Martin Hrabé de Angelis 2 3

Institute of Experimental Genetics,3 Department of Comparative Medicine,4 Institute of Pathology,5 GSF - National Research Center for Environment and Health, D-85764 Neuherberg, Germany

ABSTRACT

The aim of this study was to estimate the risk of mouse hepatitis virus (MHV) transmission by the in vitro fertilization and embryo transfer (IVF-ET) procedure. In addition, resistance to infection of zona-intact and laser-microdissected oocytes was compared. For this purpose, infectious mouse hepatitis virus, a common viral pathogen in mouse facilities, was used. Oocytes having an intact or laser-microdissected zona pellucida were incubated for fertilization in media containing MHV-A59 and resulting embryos were transferred to the oviduct of specific pathogen-free (SPF) Swiss recipients. The oocytes were divided into three experimental groups: 1) zona-intact oocytes continuously exposed to MHV in fertilization (HTF), culture (KSOM), and embryo transfer (M2) media; 2) zona-intact oocytes exposed to MHV in HTF medium and transferred after a standard washing procedure with virus-free KSOM and M2; and 3) laser-microdissected oocytes exposed to MHV in HTF medium and transferred after a standard washing procedure with virus-free KSOM and M2. Respective serum samples of embryo recipients and their offspring were tested for MHV antibodies using ELISA. In experiment 1, 10 out of 14 embryo recipients seroconverted to MHV and only their offspring (8 of 19) received maternal antibodies. In experiments 2 and 3, MHV antibodies were detected neither in the recipients nor in the offspring. These results indicate, for the first time, that even if the zona pellucida is partially disrupted by laser microdissection, the transmission of MHV-A59 can be avoided by correctly performed washing steps in the IVF-ET procedure.

assisted reproductive technology, in vitro fertilization, MHV infection

FOOTNOTES

1 Supported by the European Commission under FP6, by EMMAinf (506455) to MHdA and by the grant of the National Genome Research Network, NGFN2 (01GR0103) to MHdA.

2 Correspondence: FAX: 0049 89 3187 3500; hrabe{at}gsf.de






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Copyright © 2006 by the Society for the Study of Reproduction.