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中国防痨杂志 ›› 2014, Vol. 36 ›› Issue (6): 440-446.doi: 10.3969/j.issn.1000-6621.2014.06.007

• 论著 • 上一篇    下一篇

MF59佐剂增强热灭活卡介苗的免疫原性

黄香玉 张春青 李军丽 邵进士 何秀云   

  1. 100091 北京,解放军第三〇九医院 器官移植与免疫调节北京市重点实验室(黄香玉、何秀云);西南大学生命科学学院微生物专业(张春青、李军丽、邵进士)
  • 收稿日期:2014-04-17 出版日期:2014-06-10 发布日期:2014-06-28
  • 通信作者: 何秀云 E-mail:xwhe@sohu.com
  • 基金资助:

    国家重大传染病专项(2013ZX10003006-003-001)

MF59 adjuvant enhances immunogenicity of heat-killed BCG

HUANG Xiang-yu, ZHANG Chun-qing, LI Jun-li, SHAO Jin-shi, HE Xiu-yun   

  1. Beijing Key Laboratory of Organ Transplantation and Immunology Regulation, the 309th Hospital of the Chinese People’s Liberation Army, Beijing 100091, China
  • Received:2014-04-17 Online:2014-06-10 Published:2014-06-28
  • Contact: HE Xiu-yun E-mail:xwhe@sohu.com

摘要: 目的 研究MF59佐剂[一种由角鲨烯、山梨糖醇三油酸酯(Span85)、吐温80和柠檬酸缓冲液组成的水包油乳剂]对热灭活BCG(hBCG)免疫小鼠诱导免疫应答的影响,验证自制MF59增强hBCG诱导细胞免疫反应的作用。 方法  BALB/c(SPF级)小鼠分成A~G组,每组8只,于第0、2、4周皮下注射0.2 ml MF59、低剂量hBCG(0.025 mg/ml)、中剂量hBCG(0.25 mg/ml)、高剂量hBCG(2.5 mg/ml)、MF59+低剂量hBCG、MF59+中剂量hBCG、MF59+高剂量hBCG。末次免疫2周,解剖小鼠。取小鼠脾细胞和腹腔巨噬细胞,并在体外经BCG-PPD刺激培养,ELISA检测培养上清γ干扰素(IFN-γ)、白细胞介素(IL)-1β、IL-2、IL-4、IL-12含量,酶联免疫斑点法(ELISPOT)检测脾细胞分泌IFN-γ、IL-2和IL-4的斑点形成细胞数(SFCs)。所有试验组的平均值比较采用一元方差分析、每两组平均值比较采用最小显著差异法,以P<0.05 为差异有统计学意义。 结果  MF59作为高剂量hBCG的佐剂(G组)免疫小鼠,其脾细胞体外经BCG-PPD刺激培养,分泌IFN-γ的SFCs[(151.3±66.6)个]、IL-2的SFCs[(247.8±58.0)个]和IL-4的SFCs[(65.8±24.6)个]显著高于其他组[其他组IFN-γ、IL-2和IL-4的SFCs的最高平均值分别为(30.4±13.0)个、(37.1±10.8)个和(16.4±9.7个)](分泌IFN-γ的SFCs比较,t=3.2, P=0.007;分泌IL-2的SFCs比较,t=3.6, P=0.003;分泌IL-4的SFCs比较,t=3.0, P=0.01)。MF59与不同剂量hBCG联合免疫小鼠,其腹腔巨噬细胞体外经BCG-PPD刺激培养,培养上清IL-1β水平分别为(663.3±177.5)pg/ml、(813.8±193.4)pg/ml和(742.3±316.1)pg/ml,均显著高于A、B和C组[分别为(104.7±65.8)pg/ml、(82.9±54.8)pg/ml和(66.5±53.5)pg/ml](E、F和G与A组比较:t=2.9, P=0.01;t=3.5, P=0.004;t=2.5, P=0.031。E、F和G与B组比较:t=3.1, P=0.007;t=3.6, P=0.003;t=2.6, P=0.024。E、F和G与C组比较:t=3.0, P=0.01;t=3.5, P=0.004;t=2.5, P=0.031)。A、C和G组小鼠的腹腔巨噬细胞体外经BCG-PPD刺激培养,培养上清IL-12水平[分别为(36.3±20.5)pg/ml、(94.5±20.6)pg/ml和(128.2±54.6)pg/ml]均显著低于E和F组[(545.7±97.2)pg/ml和(665.5±295.4)pg/ml](A、C和G组与E组比较:t=-5.1, P=0.000;t=-4.5, P=0.000;t=-3.7, P=0.002。A、C和G组与F组比较:t=-4.4, P=0.001;t=-3.7, P=0.002;t=-2.9, P=0.012)。 结论  MF59与高剂量hBCG联合免疫小鼠,可以增强脾细胞体外分泌BCG-PPD特异的IFN-γ、IL-2和IL-4;MF59与低、中剂量hBCG联合免疫小鼠,可以增强腹腔巨噬细胞体外分泌BCG-PPD特异的IL-1β和IL-12。

关键词: 聚山梨醇酯类, 角鲨烯, 卡介苗, 佐剂, 免疫, 细胞因子类

Abstract: Objective To study the effects of MF59 (an oil-in-water emulsion composed of small droplets of squalene surrounded by a monolayer of nonionic detergents (Span85 and Tween 80)) as adjuvant on immune responses to the heat-killed Bacillus Calmette-Guérin (hBCG) to prove MF59 enhancing the cellular immune responses to hBCG. Methods BALB/c mice were divided into seven groups, which were immunized with MF59 (group A), low doses of hBCG (0.025 mg/ml) (group B), middle doses of hBCG (0.25 mg/ml) (group C), high doses of hBCG (2.5 mg/ml) (group D), MF59+ low doses of hBCG (group E), MF59+ middle doses of hBCG (group F) and MF59+ high doses of hBCG (group G) for three times at intervals of two weeks, respectively. The mice were sacrificed two weeks after the last immunization. The splenic lymphocytes and peritoneal macrophages were isolated and cultured with BCG-PPD. Sandwich ELISA and ELISPOT assay were used to detect BCG-PPD-specific cytokines in culture supernatants and the number of IFN-γ, IL-2, IL-4 producing spot forming cells (SFCs), respectively. One-way analysis of variance with least-significant-difference (LSD) comparisons was used to test differences among the levels of cytokines and the number of SFCs. P values of <0.05 were considered statistically significant. Results The number of IFN-γ, IL-2, IL-4 producing SFCs in group G (151.3±66.6, 247.8±58.0, and 65.8±24.6) was higher than that in other groups (the biggest means of IFN-γ, IL-2, IL-4 producing SFCs were (30.4±13.0), (37.1±10.8), and (16.4±9.7), respectively) (t=3.2, P=0.007 for IFN-γ producing SFCs;t=3.6, P=0.003 for IL-2 producing SFCs;t=3.0, P=0.01 for IL-4 producing SFCs). The levels of IL-1β in the supernatants from BCG-PPD-stimulated peritoneal macrophages were higher in groups E (663.3±177.5 pg/ml), F (813.3±193.4 pg/ml), and G (742.3±316.1 pg/ml) than that in groups A (104.7±65.8 pg/ml), B (82.9±54.8 pg/ml) and C (66.5±53.5 pg/ml) (group E vs A, t=2.9, P=0.01; group F vs A, t=3.5, P=0.004; group G vs A, t=2.5, P=0.031; group E vs B, t=3.1, P=0.007; group F vs B, t=3.6, P=0.003; group G vs B, t=2.6, P=0.024; group E vs C, t=3.0, P=0.01;group F vs C, t=3.5, P=0.004;group G vs C, t=2.5, P=0.031). The levels of IL-12 were lower in groups A (36.3±20.5 pg/ml), C (94.5±20.6 pg/ml) and G (128.2±54.6 pg/ml) than that in groups E (545.7±97.2 pg/ml) and F (665.5±295.4 pg/ml) (group A vs E, t=-5.1, P=0.000; group C vs E, t=-4.5, P=0.000; group G vs E, t=-3.7, P=0.002; group A vs F, t=-4.4, P=0.001; group C vs F, t=-3.7, P=0.002; group G vs F, t=-2.9, P=0.012). Conclusion MF59 combined with high dose of hBCG adjuvant can induce BCG-PPD specific IFN-γ, IL-2, and IL-4 secretion from splenic lymphocytes, and MF59 combined with low or middle doses of hBCG adjuvant can increase the levels of IL-1β and IL-12 secreted from the macrophage.

Key words: Polysorbates, Squalene, BCG vaccine, Adjuvants, immunologic, Cytokines