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© Institut Pasteur
Macrophages et lymphocytes de souris. Image colorisée.
Publication : Nature immunology

Monoallelic expression of the murine gene encoding Toll-like receptor 4

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature immunology - 31 Mar 2003

Pereira JP, Girard R, Chaby R, Cumano A, Vieira P

Link to Pubmed [PMID] – 12665857

Nat. Immunol. 2003 May;4(5):464-70

Defects in the gene encoding Toll-like receptor 4 (Tlr4) result in impaired responses to lipopolysaccharide (LPS), rendering mice sensitive to infections by Gram-negative bacteria. C3H/HeJ mice have a codominant allele with a mutation in Tlr4, which results in an intermediate response to LPS in F1 mice from crosses of responder and C3H/HeJ mice. Here we show that this intermediate response to LPS is due to monoallelic expression of Tlr4. Allele usage is maintained during clonal expansion, a situation that resembles allelic exclusion. In contrast, Tlr4 is deleted on the recessive C57BL/10ScCr allele and all cells from F1 mice from crosses of responder and C57BL/10ScCr mice express TLR4 protein. Thus, Tlr4 is an autosomal gene whose expression is regulated similarly to that of genes on the X chromosome.

http://www.ncbi.nlm.nih.gov/pubmed/12665857