Type-I but not type-II interferon receptor knockout mice are susceptible to biliary atresia.

Abstract:

:The etiology of biliary atresia (BA) is not yet understood, but recent studies have shown inflammation with an up-regulated interferon (IFN) activity in the intra- and extrahepatic bile ducts of patients with BA. These findings support an inflammatory/infectious cause of BA as mimicked in our infective murine model. To study the role of the IFN receptors in our model, we used mice with inactivated INF-alpha/beta receptor A129, with inactivated IFN-gamma receptor G129, or inactivation of both interferon receptors AG129 as well as the wild type controls W129. Mice were infected with rotavirus within 48h of birth and 7 d postpartum. The incidence of BA in each group was determined during a 3 wk period. In the second week the virus load was measured. BA incidence was 76% in A129 and 67% in AG129 animals, whereas in the G129 group only 33% of the pups developed BA. The wild type presented with a BA-incidence of 15%, while 7 d old mice failed to develop BA. There was no significant difference in the virus load of the livers between the groups independent of clinical symptoms. In conclusion, inactivation of type I INF-receptor significantly increases the incidence of BA following postpartal rotavirus infection. This effect is independent of the presence of type II-INF-receptors. Thus, in our model a type I IFN-linked deregulation of the innate immune system appears to be crucial for the induction of biliary atresia.

journal_name

Pediatr Res

journal_title

Pediatric research

authors

Kuebler JF,Czech-Schmidt G,Leonhardt J,Ure BM,Petersen C

doi

10.1203/01.pdr.0000219860.96732.09

subject

Has Abstract

pub_date

2006-06-01 00:00:00

pages

790-4

issue

6

eissn

0031-3998

issn

1530-0447

pii

01.pdr.0000219860.96732.09

journal_volume

59

pub_type

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