title: Immunogenicity and protective efficacy of DMT liposome-adjuvanted tuberculosis subunit CTT3H vaccine.
abstract: Different strategies have been proposed for the development of protein subunit vaccine candidates for tuberculosis (TB), which shows better safety than other types of candidates and the currently used Bacillus Calmette-Guérin (BCG) vaccine. In order to develop more effective protein subunits depending on the mechanism of cell-mediated immunity against TB, a polyprotein CTT3H, based on 5 immunodominant antigens (CFP10, TB10.4, TB8.4, Rv3615c, and HBHA) with CD8(+) epitopes of Mycobacterium tuberculosis, was constructed in this study. We vaccinated C57BL/6 mice with a TB subunit CTT3H protein in an adjuvant of dimethyldioctadecylammonium/monophosphoryl lipid A/trehalose 6,6'-dibehenate (DDA/MPL/TDB, DMT) liposome to investigate the immunogenicity and protective efficacy of this novel vaccine. Our results demonstrated that DMT liposome-adjuvanted CTT3H vaccine not only induced an antigen-specific CD4(+) Th1 response, but also raised the number of PPD- and CTT3H-specific IFN-γ(+) CD8(+) T cells and elicited strong CTL responses against TB10.4, which provided more effective protection against a 60 CFU M. tuberculosis aerosol challenge than PBS control and DMT adjuvant alone. Our findings indicate that DMT-liposome is an effective adjuvant to stimulate CD8(+) T cell responses and the DMT-adjuvanted subunit CTT3H vaccine is a promising candidate for the next generation of TB vaccine.
authors.affiliation: a Department of Pathogen Biology; School of Basic Medicine; Huazhong University of Science & Technology ; Wuhan , PR China.
authors.forename: Xindong
authors.initials: X
authors.lastname: Teng
authors.forename: Maopeng
authors.initials: M
authors.lastname: Tian
authors.forename: Jianrong
authors.initials: J
authors.lastname: Li
authors.forename: Songwei
authors.initials: S
authors.lastname: Tan
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Yuan
authors.forename: Qi
authors.initials: Q
authors.lastname: Yu
authors.forename: Yukai
authors.initials: Y
authors.lastname: Jing
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Zhang
authors.forename: Tingting
authors.initials: T
authors.lastname: Yue
authors.forename: Lei
authors.initials: L
authors.lastname: Zhou
authors.forename: Xionglin
authors.initials: X
authors.lastname: Fan
mesh_terms: D000276:Adjuvants, Immunologic / Q000008:administration & dosage*; D000818:Animals; D000942:Antigens, Bacterial / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D004195:Disease Models, Animal; D005260:Female; D008081:Liposomes / Q000008:administration & dosage*; D008810:Mice, Inbred C57BL; D009169:Mycobacterium tuberculosis / Q000276:immunology*; D011993:Recombinant Fusion Proteins / Q000276:immunology; D014376:Tuberculosis / Q000276:immunology / Q000517:prevention & control*; D032581:Tuberculosis Vaccines / Q000276:immunology*; D022223:Vaccines, Subunit / Q000276:immunology; D014614:Vaccines, Synthetic / Q000276:immunology
chemical_list: D000276:Adjuvants, Immunologic; D000942:Antigens, Bacterial; D008081:Liposomes; D011993:Recombinant Fusion Proteins; D032581:Tuberculosis Vaccines; D022223:Vaccines, Subunit; D014614:Vaccines, Synthetic
keywords: DDA; MPL; TDB; adjuvant; subunit vaccine; tuberculosis