Protection of murine gestational tissues from picornavirus infection in the preimplantation period.

Abstract:

:Mice were inoculated with Theiler's murine encephalomyelitis virus (TMEV) on gestational days 1-3 (pre-implantation) or days 4-5 (peri- or post-implantation) or with control cell lysate (days 1-5). Dams were subsequently sacrificed between days 11-14 of gestation, and placentae and fetuses were harvested. Few placentae from dams inoculated with virus on days 1-3 were positive by virus culture (2 per cent) or in situ hybridization (6 per cent), and no fetuses were positive by either technique. In contrast, most placentae from dams inoculated with virus on days 4-5 were virus-positive by culture (96 per cent) or in situ hybridization (100 per cent), and a moderate number of fetuses were also positive (30 per cent by culture, 19 per cent by in situ hybridization). Necrosis was present more frequently in placentae from mice inoculated with virus on days 4-5 (55 per cent) than in placentae from dams inoculated with virus on days 1-3 (19 per cent) or with control cell lysate (18 per cent). Viral infection, mononuclear inflammation and cell necrosis were identified in the heart and great vessels of TMEV-infected fetuses. These results indicate that gestational tissues are largely protected from viral infection before implantation. After implantation, gestational tissues are more readily infected and damaged by maternal picornavirus infection.

journal_name

Placenta

journal_title

Placenta

authors

Abzug MJ,Tyson RW

doi

10.1053/plac.1999.0488

keywords:

subject

Has Abstract

pub_date

2000-05-01 00:00:00

pages

422-6

issue

4

eissn

0143-4004

issn

1532-3102

pii

S0143-4004(99)90488-5

journal_volume

21

pub_type

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