title: Immunological evaluation of SW-HSA conjugate on goats.
abstract: Locoweeds cause significant livestock poisoning and economic loss all over the world. The purpose of this study was to investigate the immune effects of locoweed toxin, swainsonine (SW) and human serum albumin (HSA) conjugate (SW-HSA), on goats. Twenty-four Sannon goats were randomly separated into immune control group (eight goats), immune poisoning group I (six goats), immune poisoning group II (six goats) and poisoning control group (four goats). Immune control group, immune poisoning groups I and II were first vaccinated with SW-HSA conjugate. The poisoning control group, immune poisoning groups I and II were then fed with 10.0 g/kg BW/day dry powder of Oxytropis kansuensis Bunge everyday morning. The immune control group was supplied with an alfalfa-based diet. Blood samples of these experimental animals were collected at different time interval. Immunoassay was performed using indirect ELISA and E-rosette technique. The results show that, after second booster immunization: (1) anti-SW antibody level in some goats increased to 2(8), which proves that SW-HSA conjugate can induce experimental animals to produce high-level anti-SW antibody in their bodies; (2) the high-level antibody in their bodies could maintain 30 days, and decreased gradually after poisoning experiment (in our experiment, there was a return of the antibody level on day 21 after poisoning experiment); (3) the decreasing of the E-rosette rate of the immune poisoning group was delayed 14 days, which suggests that SW-HSA could low down the loss of the immunity of the goats; (4) swainsonine concentration in the blood was significantly lower (p<0.01) in the immune poisoning groups than that in the poisoning control group, and there was no significant difference (p>0.01) between the two immune poisoning groups within the poisoning experiment.
authors.affiliation: College of Animal Science and Technology, Northwest A & F University, Yangling, Shananxi 712100, PR China. dwtong@nwsuaf.edu.cn
authors.forename: Dewen
authors.initials: D
authors.lastname: Tong
authors.forename: Peihong
authors.initials: P
authors.lastname: Mu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Dong
authors.forename: Baoyu
authors.initials: B
authors.lastname: Zhao
authors.forename: Wenming
authors.initials: W
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Zhao
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Zhou
authors.forename: Jinyi
authors.initials: J
authors.lastname: Wang
authors.forename: Guodong
authors.initials: G
authors.lastname: Sui
mesh_terms: D000818:Animals; D000906:Antibodies / Q000032:analysis; D006041:Goats; D006801:Humans; D033021:Oxytropis / Q000633:toxicity; D010939:Plant Poisoning / Q000276:immunology / Q000662:veterinary*; D012709:Serum Albumin / Q000276:immunology*; D000075462:Serum Albumin, Human; D017026:Swainsonine / Q000031:analogs & derivatives* / Q000276:immunology*; D014611:Vaccination / Q000662:veterinary*
chemical_list: D000906:Antibodies; D012709:Serum Albumin; C521806:swainsonine-human serum albumin conjugate; D017026:Swainsonine; D000075462:Serum Albumin, Human