Molecule possessing ankyrin-repeats induced by lipopolysaccharide (MAIL) is a nuclear IkappaB protein recently identified as a molecule appearing in immunocompetent organs after administration of bacterial lipopolysaccharide (LPS). Participation of Toll-like receptor (TLR) 4, which is a major form of LPS receptors, in the LPS-induced MAIL expression was investigated. When a human myelomonocytic cell line U937 was treated with phorbol 12-myristate 13-acetate for 3 days, the LPS-induced MAIL expression was much potentiated in parallel with an increase in TLR4 expression. The MAIL induction was attenuated when the cells were treated with a neutralizing antibody against TLR4. The in vivo induction of MAIL in the spleen was smaller in mice having a missense mutation of the Tlr4 gene than in normal control mice. These results collectively indicate that TLR4 contributes, at least in part, MAIL induction after LPS stimulation.
Bacterial lipopolysaccharide induces mRNA expression of an IkappaB MAIL through toll-like receptor 4.
H. Kitamura,K. Kanehira,T. Shiina,M. Morimatsu,B. Jung,S. Akashi,M. Saito
Published 2002 in Journal of Veterinary Medical Science
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- Publication year
2002
- Venue
Journal of Veterinary Medical Science
- Publication date
2002-05-01
- Fields of study
Biology, Medicine
- Identifiers
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- Source metadata
Semantic Scholar, PubMed
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