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Infection and Immunity, March 2000, p. 1328-1336, Vol. 68, No. 3
Max-Planck-Institut für Biologie,
Abteilung Membranbiochemie, D-72076 Tübingen, Germany
Received 17 May 1999/Returned for modification 23 July
1999/Accepted 29 November 1999
A mixture of well-defined recombinant antigens together with an
adjuvant that preferentially stimulates specific gamma interferon (IFN-
0019-9567/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Subunit Vaccination of Mice against New World
Cutaneous Leishmaniasis: Comparison of Three Proteins Expressed in
Amastigotes and Six Adjuvants
)-secreting helper type 1 CD4+ T cells (Th1 cells)
presents a rational option for a vaccine against leishmaniasis. The
potential of this approach was investigated in murine infections with
Leishmania mexicana, which are characterized by the absence
of a parasite-specific Th1 response and uncontrolled parasite
proliferation. A mixture of three antigens (glycoprotein 63, cysteine
proteinases, and a membrane-bound acid phosphatase), which are all
expressed in amastigotes, the mammalian stage of the parasite, were
used for the immunization of C57BL/6 mice in combination with six
adjuvants (interleukin 12 [IL-12], Detox, 4'-monophosphoryl lipid A,
QS-21, Mycobacterium bovis BCG, and Corynebacterium
parvum). All six vaccine formulations containing the mixture of
recombinant antigens were protective against challenge infections with
promastigotes, the insect stage of the parasite, in that mice
controlled and healed infections but developed transient and, in
certain cases, accentuated disease. The most effective adjuvants were
IL-12 followed by Detox. Further studies using these two adjuvants
showed that a similar protective effect was observed with a mixture of
the corresponding native proteins, and mice which had controlled the
infection showed a preponderance of IFN-
-secreting CD4+
T cells in the lymph nodes draining the lesion. Using the recombinant proteins individually, it is shown that the relatively abundant cysteine proteinases and glycoprotein 63, but not the acid phosphatase, are able to elicit a protective response. The results are discussed in
comparison to previous studies with subunit vaccines and with respect
to cell biological aspects of antigen presentation in Leishmania-infected macrophages.
*
Corresponding author. Mailing address:
Max-Planck-Institut für Biologie, Abteilung Membranbiochemie,
Corrensstrasse 38, D-72076 Tübingen, Germany. Phone:
49-7071-601-237. Fax: 49-7071-601-235. E-mail:
peter.overath{at}tuebingen.mpg.de.
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