Infection of C57BL/10ScCr and C57BL/10ScNCr mice with Leishmania major reveals a role for Toll-like receptor 4 in the control of parasite replication.


Kropf, P; Freudenberg, N; Kalis, C; Modolell, M; Herath, S; Galanos, C; Freudenberg, M; Müller, I; (2004) Infection of C57BL/10ScCr and C57BL/10ScNCr mice with Leishmania major reveals a role for Toll-like receptor 4 in the control of parasite replication. Journal of leukocyte biology, 76 (1). pp. 48-57. ISSN 0741-5400 DOI: https://doi.org/10.1189/jlb.1003484

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Abstract

The innate immune system is essential for host defense; it senses the presence of potentially pathogenic-invading microorganisms, and the contribution of Toll-like receptors (TLRs) to this response is increasingly recognized. In the present study, we investigated the contribution of TLR4 to the course of cutaneous leishmaniasis in vivo. We used C57BL/10ScNCr (TLR4(0/0)) and C57BL/10ScCr [TLR4/interleukin-12 (IL-12)Rbeta2(0/0)] mice and compared the course of Leishmania major infection, parasite load, cell recruitment, and cytokine profile with those of wild-type C57BL/10ScSn mice. Our results confirm the importance of IL-12 receptor-mediated signaling in resistance to L. major infections. Importantly, we show that the lack of TLR4 results in an increased permissiveness for parasite growth during the innate and adaptive phase of the immune response and in delayed healing of the cutaneous lesions. The use of the tlr4 transgenic mouse strain TCr5 demonstrated unequivocally that TLR4 contributes to the efficient control of Leishmania growth in vivo.

Item Type: Article
Faculty and Department: Faculty of Infectious and Tropical Diseases > Dept of Immunology and Infection
Research Centre: Leishmaniasis Group
PubMed ID: 15039466
Web of Science ID: 222283400008
URI: http://researchonline.lshtm.ac.uk/id/eprint/1630

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