Mahmoudzadeh-Niknam Hamid, Khalili Ghader, Abrishami Firoozeh, Najafy Ali, Khaze Vahid
Department of Immunology, Pasteur Institute of Iran, No. 69 Pasteur Ave., Tehran 13164, Iran.
Korean J Parasitol. 2013 Feb;51(1):69-74. doi: 10.3347/kjp.2013.51.1.69. Epub 2013 Feb 18.
Leishmania tropica is one of the causative agents of leishmaniasis in humans. Routes of infection have been reported to be an important variable for some species of Leishmania parasites. The role of this variable is not clear for L. tropica infection. The aim of this study was to explore the effects of route of L. tropica infection on the disease outcome and immunologic parameters in BALB/c mice. Two routes were used; subcutaneous in the footpad and intradermal in the ear. Mice were challenged by Leishmani major, after establishment of the L. tropica infection, to evaluate the level of protective immunity. Immune responses were assayed at week 1 and week 4 after challenge. The subcutaneous route in the footpad in comparison to the intradermal route in the ear induced significantly more protective immunity against L. major challenge, including higher delayed-type hypersensitivity responses, more rapid lesion resolution, lower parasite loads, and lower levels of IL-10. Our data showed that the route of infection in BALB/c model of L. tropica infection is an important variable and should be considered in developing an appropriate experimental model for L. tropica infections.
热带利什曼原虫是人类利什曼病的病原体之一。据报道,感染途径是某些利什曼原虫寄生虫种类的一个重要变量。对于热带利什曼原虫感染,这个变量的作用尚不清楚。本研究的目的是探讨热带利什曼原虫感染途径对BALB/c小鼠疾病结局和免疫参数的影响。采用了两种途径;足垫皮下注射和耳部皮内注射。在建立热带利什曼原虫感染后,用硕大利什曼原虫攻击小鼠,以评估保护性免疫水平。在攻击后第1周和第4周检测免疫反应。与耳部皮内途径相比,足垫皮下途径对硕大利什曼原虫攻击诱导了显著更强的保护性免疫,包括更高的迟发型超敏反应、更快的病变消退、更低的寄生虫载量和更低的IL-10水平。我们的数据表明,在热带利什曼原虫感染的BALB/c模型中,感染途径是一个重要变量,在开发适合热带利什曼原虫感染的实验模型时应予以考虑。