title: CpG oligodeoxynucleotides augment the immune responses of piglets to swine Pasteurella multocida living vaccine in vivo.
abstract: Oligodeoxynucleotides containing unmethylated CpG motifs (CpG ODN) prevent development of T-helper type 2 (Th2) immune response and reverse established allergic responses in mouse models. However, little work on immune responses in piglets has been conducted in vivo. In this report, the ability of a porcine-specific CpG ODN to act as an immunostimulant and enhance immune responses of piglets to swine Pasteurella multocida living vaccine (SPML vaccine) was determined. The titre of IgG and IgG1/IgG2 isotype to SPML vaccine in serum, the proliferation of lymphocytes, SPML-specific interferon-gamma (IFN-gamma) and IL-6, TNF-alpha, IL-4 production of PBMCs in vitro and IFN-gamma, IL-6, TNF-alpha, IL-4, IL-10 in piglets serum were examined to identify the immune responses of the piglets. Immune responses of the piglets vaccinated with SPML and CpG ODN were significantly stronger than responses of piglets vaccinated with SPML alone. All these data summarized that immunostimulatory CpG ODN could modulate the immune response towards a Th1-like response when co-administered to piglets during SPML vaccination, which suggested that the therapeutic uses envisioned for these ODNs (as vaccine adjuvants and immunoprotective agents) may be applicable to husbandry animals.
authors.affiliation: Microbiological Staff Room, College of Life Sciences, South China Agricultural University, Wushan Road, Tianhe District, Guangzhou, GuangDong 510642, China.lhzhang73212000@yahoo.com.cn
authors.forename: Linghua
authors.initials: L
authors.lastname: Zhang
authors.forename: Xingshan
authors.initials: X
authors.lastname: Tian
authors.forename: Fengzhen
authors.initials: F
authors.lastname: Zhou
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines / Q000276:immunology*; D049109:Cell Proliferation; D018899:CpG Islands / Q000235:genetics / Q000276:immunology*; D016207:Cytokines / Q000097:blood; D004305:Dose-Response Relationship, Drug; D007074:Immunoglobulin G / Q000097:blood; D007963:Leukocytes, Mononuclear / Q000502:physiology; D016979:Pasteurella multocida / Q000276:immunology*; D013552:Swine; D013553:Swine Diseases / Q000276:immunology* / Q000382:microbiology / Q000517:prevention & control*; D013997:Time Factors
chemical_list: D001428:Bacterial Vaccines; D016207:Cytokines; D007074:Immunoglobulin G