The dendritic cell receptor DC-SIGN discriminates among species and life cycle forms of Leishmania

M Colmenares, AL Corbí, SJ Turco… - The Journal of …, 2004 - journals.aai.org
The Journal of Immunology, 2004journals.aai.org
Infection of dendritic cells by the human protozoal parasite Leishmania is part of its survival
strategy. The dendritic cell receptors for Leishmania have not been established and might
differ in their interactions among Leishmania species and infective stages. We present
evidence that the surface C-type lectin DC-SIGN (CD 209) is a receptor for promastigote and
amastigote infective stages from both visceral (Leishmania infantum) and New World
cutaneous (Leishmania pifanoi) Leishmania species, but not for Leishmania major …
Abstract
Infection of dendritic cells by the human protozoal parasite Leishmania is part of its survival strategy. The dendritic cell receptors for Leishmania have not been established and might differ in their interactions among Leishmania species and infective stages. We present evidence that the surface C-type lectin DC-SIGN (CD 209) is a receptor for promastigote and amastigote infective stages from both visceral (Leishmania infantum) and New World cutaneous (Leishmania pifanoi) Leishmania species, but not for Leishmania major metacyclic promastigotes, an Old World species causing cutaneous leishmaniasis. Leishmania binding to DC-SIGN was found to be independent of lipophosphoglycan, the major glycoconjugate of the promastigote plasma membrane. Our findings emphasize the relevance of DC-SIGN in Leishmania-dendritic cell interactions, an essential link between innate and Leishmania-specific adaptive immune responses, and suggest that DC-SIGN might be a therapeutic target for both visceral and cutaneous leishmaniasis
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