Summary

从使用鸡蛋<em>血吸虫</em>作为<em>在体内</em>蠕虫引起的肺部炎症模型

Published: June 05, 2012
doi:

Summary

血吸虫卵是强有力的刺激T辅助2型(Th2细胞)的免疫反应,寄生虫感染的特点,哮喘和过敏性炎症。该协议利用S。血吸虫卵注射产生的CD4 Th2细胞因子诱导的炎症反应在肺,肺肉芽肿形成的特点,各地的鸡蛋,嗜酸性粒细胞和巨噬细胞替代激活。

Abstract

血吸虫寄生虫血吸虫感染估计有200万人,全世界1。血吸虫 ,严重的病理,包括肝纤维化和脾肿大,慢性感染引起的免疫反应,而不是寄生虫本身2寄生虫卵。寄生虫卵诱导Th2反应特点是生产的IL-4,IL-5和IL-13,替代激活的巨噬细胞和嗜酸性粒细胞的招聘。在这里,我们描述了一个模型来研究特定的寄生虫在Th2细胞因子反应和肺淋巴结,形成肺肉芽肿周围的蛋,呼吸道炎症注射血吸虫卵。

腹腔宣传和静脉的挑战, 与血吸虫卵被运送到肺,通过他们被困在肺实质的肺动脉由淋巴细胞,嗜酸性粒细胞和另外激活的巨噬细胞3-6组成的肉芽肿。与肉芽肿形成,在炎症的支气管肺泡空间关联的,扩大的淋巴结和CD4 T细胞活化可以观察到。这里我们详细介绍了协议隔离(从7修改)感染的肝血吸虫卵,敏感和具有挑战性的老鼠,和恢复分析机关(支气管肺泡灌洗(BAL),肺和淋巴结)。我们也有代表性的组织学和免疫学数据和其他免疫分析的建议。

总体而言,这种方法提供了在体内模型,以探讨在肺寄生虫引起的免疫反应,这是广泛适用于Th2细胞的炎症性疾病,包括寄生虫感染,纤维化疾病,过敏性炎症和哮喘的研究。这种模式的优势,为典型研究E 2的肺部发炎,包括一个强有力的Th2细胞在肺部的炎症反应和淋巴结的重复性,便于鸡蛋周围的肉芽肿病理检查炎症的评估,和潜在的长期存储的寄生虫鸡蛋。

Protocol

1。净化血吸虫卵瑞士韦伯斯特小鼠感染血吸虫尾蚴,感染血吸虫生命周期8阶段。另外,获得NIAID的血吸虫病资源中心(血吸虫感染小鼠http://www.schisto-resource.org/~~V )。离开小鼠感染后6-7周,时间点,鸡蛋是在肝脏中,可以恢复如下所述( 见图1)。 安乐死与CO 2的小鼠,并用70%乙醇湿。将鼠?…

Discussion

在这里,介绍一个模型,采用血吸虫卵诱导2型肺部发炎。这种模式的典型特征包括强有力的Th2型免疫反应,气道炎症和肺肉芽肿形成。由于这些参数依赖CD4 Th2细胞的反应11,这是一个有用的模型,探讨Th2细胞反应的特定蛋白质或特定谱系缺失的影响。这里的读数将包括抗原特异性Th2细胞因子的量化分析,呼吸道细胞浸润,肺肉芽肿的大小。一个额外的参数,可衡量的是鸡蛋引起的?…

Disclosures

The authors have nothing to disclose.

Acknowledgements

这项工作是由美国国立卫生研究院(NIH)AI091759和克隆氏病和结肠炎基金会美国的威廉·谢尔比参数及家庭基金会研究奖(MN)的支持。 NIAID的血吸虫资源中心(NIAID的合同N01,A130026)提供的血吸虫感染小鼠。

Materials

Reagent Size/Description Company Catalog #
Collagenase/Dispase 500 mg Roche Applied Science 11 097 113 001
Diff Quik Hema 3 Stain Pack Fisher Scientific Co. LLC 122-911
DMEM Liquid Gibco 11965
Falcon 50mL Pack Falcon 352070
Intramedic PE Tubing 0.58 mm Becton Dickinson and Co. 427410
Isoflurane 250 mL Abbot Animal Health 52600405
Ketamine 100 mg/mL Fort Dodge, Animal Health N/A
Mannose receptor antibody Biotin AbD Serotec MCA2235B
Metallic Strainer Standard kitchen strainer Target Laurentiis
Paraformaldehyde 16% Electron Microsc. Sciences 15710
Penicillin/ Streptomycin 100x Gibco 15070
Percoll 1 Liter GE Healthcare Biosciences 17 0891 01
RELMα antibody 50 μg Peprotech 500-P214
Surgical Thread 2.0 USP 100 yds Surgical Specialties Corp. SP118
Syringe Needle 23g, 3/4 inch BD Vacutainer Lab. Med. 305143
USA Standard Testing Sieve 150 μm, 0.0059″ W.S. Tyler, Inc. ASTME-11, Spec. No. 100
Xylazine 20 mg/mL Butler N/A

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Cite This Article
Joyce, K. L., Morgan, W., Greenberg, R., Nair, M. G. Using Eggs from Schistosoma mansoni as an In vivo Model of Helminth-induced Lung Inflammation. J. Vis. Exp. (64), e3905, doi:10.3791/3905 (2012).

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