中国寄生虫学与寄生虫病杂志 ›› 2008, Vol. 26 ›› Issue (3): 3-173.

• 论著 • 上一篇    下一篇

日本血吸虫可溶性虫卵抗原和可溶性雄虫抗原免疫小鼠PD-1-PD-L的表达

王磊1,莫红梅1,2,王淇泓1,蒋自卫1,程喻力1,刘文琪1 *,李雍龙1
  

  1. 1 华中科技大学同济医学院病原生物学系,武汉 430030; 2 新疆维吾尔自治区人民医院检验科,乌鲁木齐 830000
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-06-30 发布日期:2008-06-30

Up-expression of PD-1-PD-L Induced by Immunization with SEA and SMWA of Schistosoma japonicum in Mice

WANG Lei1,MO Hong-mei1,2,WANG Qi-hong1,JIANG Zi-wei1,CHENG Yu-li1,LIU Wen-qi1 *,LI Yong-long1
  

  1. 1 Department of Pathogenic Biology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; 2 Department of Laboratory Medicine, People′s Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830000, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-06-30 Published:2008-06-30

摘要: 目的 探讨日本血吸虫可溶性虫卵抗原(SEA)和可溶性雄虫抗原(SMWA)免疫小鼠PD-1-PD-L的表达,及其与相关细胞因子的关系。 方法 18只BALB/c雌性小鼠随机分为3组,健康对照组(A组)、SEA免疫组(B组)和SMWA免疫组(C组),B、C两组分别用日本血吸虫SEA和SMWA腹部皮下多点注射免疫,剂量均为50 μg/次,免疫4次,每次间隔1周;健康对照组用PBS代替。末次免疫4周后收集脾细胞及其培养上清,刀豆球蛋白A(Con A)刺激后,流式细胞术检测淋巴细胞表面表达的程序性死亡-1(PD-1)、树突状细胞(DCs)表面表达的程序性死亡配体-1(PD-L1)和PD-L2。双抗夹心ELISA测定脾细胞分泌的白细胞介素-4(IL-4)和γ-干扰素(IFN-γ)的表达水平。 结果 A组小鼠脾T细胞的PD-1及DC的PD-L1和PD-L2的表达率分别为(1.19±0.15)%、(0.64±0.11)%和(1.12±0.21)%。两种抗原免疫均可使这些分子表达上调(P<0.01)。SEA免疫后,PD-1的表达[(8.24±1.31)%]高于SMWA免疫[(6.08±1.28)%],且主要使PD-L2表达上调[(5.26±1.73)%];而SMWA免疫后,主要表现为PD-L1表达上调[(10.82±2.33)%]。其中PD-L1的表达上调与脾细胞分泌的IFN-γ呈正相关,而PD-L2的表达上调与IL-4的分泌呈正相关。 结论 日本血吸虫SEA和SMWA抗原免疫可诱导BALB/c雌性小鼠PD-1-PDL的表达上调。

关键词: 日本血吸虫, 程序性死亡-1, 程序性死亡配体, 白细胞介素-4, γ-干扰素

Abstract: Objective To explore the expression of PD-1-PD-L pathway of mice immunized with soluble egg antigen (SEA) or soluble male worm antigen (SMWA) of Schistosoma japonicum. Methods Eighteen BALB/c mice were randomly divided into three groups named as control group (A), SEA immunized group (B) and SMWA immunized group (C). Mice in groups B and C were subcutaneouly immunized weekly with SEA (50 μg) and SMWA(50 μg) of S. japonicum respectively. After 4 times immunization, the expression of programmed death-1(PD-1), programmed death-ligand1(PD-L1) and PD-L2 in splenic cells was measured with flow cytometer. The expression of IL-4 and IFN-γ in cu-ltural suspension of splenic cells was detected by sandwich-ELISA after stimulation with ConA. Results The expression ratio of PD-1, PD-L1 and PD-L2 was extremely low in the control group, but increased after the immunization with SEA and SMWA. The expression ratio of PD-1 was (8.24±1.31)% in SEA immunized mice, higher than the mice immunized by SMWA [(6.08±1.28)%]. PD-L2 was much more elevated in SEA immunized mice [(5.26±1.73)%] while PD-L1 more significantly increased with SMWA immunization [(10.82±2.33)%]. In addition, the up-expression of PD-L1 was associated with the level of IFN-γ and the expression of PD-L2 was associated with IL-4 secretion. Conclusion The expression of PD-1-PDL was up-regulated in BALB/c mice immunized by SEA or SMWA of S. japonicum.

Key words: Schistosoma japonicum, Programmed death-1, Programmed death-ligand, IL-4, IFN-γ