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Protective immunization against visceral leishmaniasis using Leishmania sterol 24-c-methyltransferase formulated in

Yasuyuki Goto1, Lisa Y Bogatzki, Sylvie Bertholet

  • 1Infectious Disease Research Institute, 1124 Columbia St., Suite 400, Seattle, WA 98104, USA.

Vaccine
|September 7, 2007
PubMed

We present here the identification and characterization of Leishmania sterol 24-c-methyltransferase (SMT), as well as data on protection of mice immunized with this Ag formulated in MPL-SE. Serological evaluation revealed that SMT is recognized by VL patients. C57BL/6 mice immunized with this vaccine candidate plus MPL-SE showed Ag-specific Th1 immune responses characterized by robust production of IFN-gamma upon specific Ag re-exposure in vitro. Upon challenge with L. infantum, mice immunized with SMT plus MPL-SE showed significant lower parasite burdens in both spleens and livers compared with non-immunized mice or mice injected with adjuvant alone. The results indicate that SMT/MPL-SE can be an effective vaccine candidate for use against VL.

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