中国寄生虫学与寄生虫病杂志 ›› 2008, Vol. 26 ›› Issue (2): 9-123.

• 实验研究 • 上一篇    下一篇

大鼠对旋毛虫再感染的抵抗力实验观察

全福实1 *,李幸淑2,郑明淑2,赵成元2,朱炅煥2,李俊商2,林汉锺2   

  1. 1 Emory大学医学院,微生物学与免疫学教研室,亚特兰大, 乔治亚州 30322, 美国;2 高丽大学医学院,寄生虫学教研室, 首尔136-705, 韩国
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-04-30 发布日期:2008-04-30
  • 通讯作者: 全福实

Protective Immunity and Antibody Response ofRats Infected with Trichinella spiralis

Fu-Shi QUAN1 *, Haeng-Sook LEE2, Myung-Sook CHUNG2, Sung-Weon CHO2,Kyoung-Hwan JOO2, Joon-Sang LEE2, Han-Jong RIM2   

  1. 1 Department of Microbiology and Immunology,Emory University School of Medicine,Atlanta,Georgia 30322,USA;2 Department of Parasitology and the Institute for Tropical Endemic Diseases,Korea University College of Medicine,Seoul 136-705,Korea
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-04-30 Published:2008-04-30
  • Contact: Fu-Shi QUAN

摘要: 目的 研究实验感染旋毛虫(韩国分离株)的大鼠对成虫和肌期幼虫阶段感染的保护性免疫和IgG,IgG1,IgG2a抗体反应。 方法 46只大鼠随机分为7组,其中2组(A1、A2组, 共10只)用于观察成虫阶段引起的保护性免疫,B组(B1、B2组, 共14只)用于观察肌期幼虫阶段引起的保护性免疫,C组(C1、C2组,共17只)为感染对照组,D组(5只)为正常对照组。A、B和C组分别每鼠感染1 000条旋毛虫肌幼虫,分别于感染后第7天(A1、 A2组)和第30天(B1、B2组),用氟苯咪唑治疗(20 mg/kg,10 d)。治疗后第10天,A和B组每鼠再次感染500条旋毛虫肌幼虫,于感染后第7天剖杀A1和B1组大鼠,检测肠道内成虫数,于感染后第30天剖杀A2和B2组大鼠,检测横膈膜内肌期幼虫数,同时分别剖杀感染对照组和正常对照组大鼠。每组同期取血,ELISA检测特异性IgG、IgG1和IgG2a抗体水平。结果 旋毛虫成虫阶段对成虫和肌幼虫的保护性免疫分别为100%和99.96%,肌幼虫阶段对成虫和肌幼虫的保护性免疫分别为99.92%和99.89%。肌幼虫感染阶段抗肌幼虫分泌排泄抗原的特异性IgG、IgG1和IgG2a抗体与正常对照组(分别为0.5、 0.1和0.1)和成虫感染阶段(分别为0.5、 0.09和0.09)比较,抗体反应均显著增高(分别为3.0、2.2和0.8)(P<0.01)。且幼虫期抗肌幼虫分泌排泄抗原特异性IgG1抗体(2.2)显著高于特异性IgG2a抗体(0.8)(P<0.01)。 结论 旋毛虫的成虫和肌幼虫阶段的感染均对成虫和幼虫的再感染产生保护性免疫。

关键词: 旋毛虫, 保护性免疫, 抗原, ELISA, IgG

Abstract: Objective To study the protective immunity and antibody (IgG, IgG1 and IgG2a) response against adult and larva infection of T.spiralis Korean isolate in rats. Methods Forty-six rats were randomly divided into 7 groups. Group A (A1,A2,10 rats) was used for the determination of protective efficacy from adult stage infection, group B (B1,B2, 14 rats) was for the protective efficacy from muscle larva stage infection, group C (C1, C2, 17 rats) was for challenge control, and group D (5 rats) served as normal control. Rats in groups A, B and C were infected with 1 000 T.spiralis muscle larvae, and the infected rats were treated with flubendazole (20 mg/kg, 10 d) at day 7 (A1, A2) and at day 30 (B1, B2). Rats in groups A and B were re-infected with 500 T.spiralis muscle larvae at day 10 after treatment. Rats in groups A1 and B1 were killed at day 7 and day 30 to inspect the reduction of adult worms in the intestines. Rats in groups A2 and B2 were killed at day 30 to detect the reduction of muscle larvae in diaphragms. Rats in groups C and D were killed at the same time, and all rats were bled at the same time. Specific anti-Trichinella IgG, IgG1 and IgG2a were detected by ELISA. Results Adult stage infection induced protective efficacy by 100% against adult stage and by 99.96% against larva stage. Larval stage infection induced protective efficacy by 99.92% against adult stage and 99.89 % against muscle larvae. Anti-muscle stage larval ES Ag (IgG 3.0, IgG1 2.2, IgG2a 0.8) and anti-adult crude Ag antibodies (IgG 1.9, IgG1 0.8, IgG2a 0.3) significantly increased in the muscle larval stage infection compared to normal control (IgG 0.5, IgG1 0.1, IgG2a 0.1) and adult stage infection (IgG 0.5, IgG1 0.09, IgG2a 0.09) (P<0.01). Higher specific IgG1 antibody (IgG1 2.2) in larva stage infection was shown than specific IgG2a antibody response(IgG2a 0.8)(P<0.01). Conclusion Protective immunity against both adult and larva worms has been induced from adult and muscle larva stage infections of T.spiralis.

Key words: Trichinella spiralis, Protective immunity, Antigen, ELISA, IgG