B6N.129S1-Tlr3^tm1Flv/J

Stock number: 009675
Product name: TLR3^-
Research areas: Cell Biology Research, Immunology, Inflammation and Autoimmunity Research

Description

Macrophages derived from these C57BL/6 background toll-like receptor 3 (Tlr3) targeted mutation animals fail to produce inflammatory cytokines, IFN-alpha or IFN-beta when challenged with poly(I:C), polyinosine-polycytidylic acid, a synthetic dsRNA analog. This mutant mouse strain may be useful in studies of the toll-like receptor pathway of the innate immune response.

Detailed description

Mice that are homozygous for the targeted mutation are viable, fertile, normal in size and do not display any gross physical or behavioral abnormalities. Northern blot analysis detects a truncated gene product (mRNA), which is not functional. Unlike wildtype macrophages, macrophages derived from these animals fail to produce inflammatory cytokines, IFN-alpha or IFN-beta when challenged with poly(I:C), polyinosine-polycytidylic acid, a synthetic dsRNA analog. Splenocytes isolated from homozygotes do not respond to viral dsRNA and have diminished IL-6 production. Mice homozygous for the mutation are resistant to poly(I:C) induced shock and produce lower levels of IL-12. This mutant mouse strain may be useful in studies of the toll-like receptor pathway of the innate immune response.

Development

A targeting vector containing a loxP site flanked neomycin resistance cassette and a herpes simplex virus thymidine kinase gene was used to disrupt exon 1. The construct was electroporated into 129S1/Sv-Oca2⁺ Tyr⁺ Kitl^Sl-J derived W9.5 embryonic stem (ES) cells. This strain was backcrossed to C57BL/6 from the National Cancer Institute (NCI) ten times by the donating laboratory.

Allele

Symbol: Tlr3^tm1Flv
Name: targeted mutation 1, Richard A Flavell
MGI accession ID: MGI:2653138
Generation method: Targeted
Attributes: Null/Knockout
Marker symbol: Tlr3
Marker name: toll-like receptor 3
Chromosome: 8
Strain of origin: 129S1/Sv-Oca2⁺ Tyr⁺ Kitl⁺
Molecular note: The gene was disrupted by replacement of exon 1 with a floxed neo cassette via homologous recombination. Northern blot analysis detected a truncated transcript in mutant animals. The mutant transcript does not encode a functional protein.