PMID- 20574442 OWN - NLM STAT- MEDLINE DCOM- 20101116 LR - 20211028 IS - 1523-1747 (Electronic) IS - 0022-202X (Print) IS - 0022-202X (Linking) VI - 130 IP - 11 DP - 2010 Nov TI - Vaccination with TAT-antigen fusion protein induces protective, CD8(+) T cell-mediated immunity against Leishmania major. PG - 2602-10 LID - 10.1038/jid.2010.171 [doi] AB - In murine leishmaniasis, healing is mediated by IFN-gamma-producing CD4(+) and CD8(+) T cells. Thus, an efficacious vaccine should induce Th1 and Tc1 cells. Dendritic cells (DCs) pulsed with exogenous proteins primarily induce strong CD4-dependent immunity; induction of CD8 responses has proven to be difficult. We evaluated the immunogenicity of fusion proteins comprising the protein transduction domain of HIV-1 TAT and the Leishmania antigen LACK (Leishmania homolog of receptors for activated C kinase), as TAT-fusion proteins facilitate major histocompatibility complex class I-dependent antigen presentation. In vitro, TAT-LACK-pulsed DCs induced stronger proliferation of Leishmania-specific CD8(+) T cells compared with DCs incubated with LACK alone. Vaccination with TAT-LACK-pulsed DCs or fusion proteins plus adjuvant in vivo significantly improved disease outcome in Leishmania major-infected mice and was superior to vaccination with DCs treated with LACK alone. Vaccination with DC+TAT-LACK resulted in stronger proliferation of CD8(+) T cells when compared with immunization with DC+LACK. Upon depletion of CD4(+) or CD8(+) T cells, TAT-LACK-mediated protection was lost. TAT-LACK-pulsed IL-12p40-deficient DCs did not promote protection in vivo. In summary, these data show that TAT-fusion proteins are superior in activating Leishmania-specific Tc1 cells when compared with antigen alone and suggest that IL-12-dependent preferential induction of antigen-specific CD8(+) cells promotes significant protection against this important human pathogen. FAU - Kronenberg, Katharina AU - Kronenberg K AD - Department of Dermatology, Johannes Gutenberg-University, Mainz, Germany. FAU - Brosch, Sven AU - Brosch S FAU - Butsch, Florian AU - Butsch F FAU - Tada, Yayoi AU - Tada Y FAU - Shibagaki, Naotaka AU - Shibagaki N FAU - Udey, Mark C AU - Udey MC FAU - von Stebut, Esther AU - von Stebut E LA - eng GR - Z01 BC010976/ImNIH/Intramural NIH HHS/United States GR - Z01 SC003669/ImNIH/Intramural NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Intramural PT - Research Support, Non-U.S. Gov't DEP - 20100624 PL - United States TA - J Invest Dermatol JT - The Journal of investigative dermatology JID - 0426720 RN - 0 (Antigens, Protozoan) RN - 0 (Protozoan Proteins) RN - 0 (Protozoan Vaccines) RN - 0 (Viral Fusion Proteins) RN - 0 (tat Gene Products, Human Immunodeficiency Virus) RN - 163832-69-7 (LACK antigen, Leishmania) RN - 187348-17-0 (Interleukin-12) SB - IM MH - Animals MH - Antigens, Protozoan/immunology MH - CD8-Positive T-Lymphocytes/*immunology MH - Dendritic Cells/immunology MH - Interleukin-12/immunology MH - Leishmania major/*immunology MH - Leishmaniasis, Cutaneous/*immunology/*prevention & control MH - Mice MH - Mice, Inbred C57BL MH - Mice, Mutant Strains MH - Protozoan Proteins/immunology MH - Protozoan Vaccines/*immunology MH - Th1 Cells/immunology MH - Viral Fusion Proteins/immunology MH - tat Gene Products, Human Immunodeficiency Virus/*immunology PMC - PMC6999697 MID - NIHMS1067651 COIS- CONFLICT OF INTEREST The authors state no conflict of interest. EDAT- 2010/06/25 06:00 MHDA- 2010/11/17 06:00 PMCR- 2020/02/04 CRDT- 2010/06/25 06:00 PHST- 2010/06/25 06:00 [entrez] PHST- 2010/06/25 06:00 [pubmed] PHST- 2010/11/17 06:00 [medline] PHST- 2020/02/04 00:00 [pmc-release] AID - S0022-202X(15)34613-3 [pii] AID - 10.1038/jid.2010.171 [doi] PST - ppublish SO - J Invest Dermatol. 2010 Nov;130(11):2602-10. doi: 10.1038/jid.2010.171. Epub 2010 Jun 24.