title: The humoral and cellular immune responses in mice induced by DNA vaccine expressing the sporozoite surface protein of Cryptosporidium parvum.
abstract: Cryptosporidiosis, a protozoan disease, is caused by Cryptosporidium parvum in animals and humans. To study the humoral and cellular immune responses induced by DNA vaccine expressing the sporozoite surface protein, CP15/60, of Cryptosporidium parvum, the recombinant plasmid containing the CP15/60 gene was injected into tibialis a interior muscle of BALB/c mice. The mice were subsequently given booster doses twice at 3-week intervals. The humoral and cellular immune responses were detected at different times after immunization. The mice were then challenged by inoculation of 1 x 10(6) oocysts of C. parvum. The experimental results have shown that the recombinant plasmid can induce corresponding specific immune responses and thus protect the mice from challenge of the oocysts, suggesting that the recombinant plasmid could be a potential candidate of DNA vaccine.
authors.affiliation: State Key Laboratory of Biomembrane and Membrane Biotechnology, Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing, P.R. China.
authors.forename: Hongxuan
authors.initials: H
authors.lastname: He
authors.forename: Baohua
authors.initials: B
authors.lastname: Zhao
authors.forename: Liyan
authors.initials: L
authors.lastname: Liu
authors.forename: Kai
authors.initials: K
authors.lastname: Zhou
authors.forename: Ximing
authors.initials: X
authors.lastname: Qin
authors.forename: Qiangzhe
authors.initials: Q
authors.lastname: Zhang
authors.forename: Xi
authors.initials: X
authors.lastname: Li
authors.forename: Changxue
authors.initials: C
authors.lastname: Zheng
authors.forename: Mingxing
authors.initials: M
authors.lastname: Duan
mesh_terms: D000818:Animals; D000917:Antibody Formation; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D002455:Cell Division / Q000502:physiology; D003457:Cryptosporidiosis / Q000276:immunology*; D016785:Cryptosporidium parvum / Q000276:immunology / Q000472:pathogenicity; D004306:Dose-Response Relationship, Immunologic; D007114:Immunization; D008214:Lymphocytes / Q000166:cytology / Q000276:immunology; D008565:Membrane Proteins / Q000235:genetics* / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D015800:Protozoan Proteins / Q000235:genetics* / Q000276:immunology; D016052:Protozoan Vaccines / Q000235:genetics / Q000276:immunology*; D034101:Sporozoites / Q000235:genetics; D019444:Vaccines, DNA / Q000235:genetics / Q000276:immunology*
chemical_list: C094890:CP15 protein, Cryptosporidium parvum; D008565:Membrane Proteins; D015800:Protozoan Proteins; D016052:Protozoan Vaccines; D019444:Vaccines, DNA