Increased Innate Lymphoid Cell 3 and IL-17 Production in Mouse Lamina Propria Stimulated with Giardia lamblia
10.3347/kjp.2019.57.3.225
- Author:
Hye Yeon LEE
1
;
Eun Ah PARK
;
Kyung Jo LEE
;
Kyu Ho LEE
;
Soon Jung PARK
Author Information
1. Department of Environmental Medical Biology and Institute of Tropical Medicine, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea. sjpark615@yuhs.ac
- Publication Type:Original Article
- Keywords:
Giardia lamblia;
innate lymphoid cell;
interleukin-17;
group 3
- MeSH:
Animals;
Gastrointestinal Tract;
Giardia lamblia;
Giardia;
Giardiasis;
Humans;
Interleukin-13;
Interleukin-17;
Interleukin-5;
Interleukins;
Intestine, Small;
Lung;
Lymphocytes;
Mice;
Mucous Membrane;
Parasites;
Pathology;
Skin;
Trophozoites
- From:The Korean Journal of Parasitology
2019;57(3):225-232
- CountryRepublic of Korea
- Language:English
-
Abstract:
Innate lymphoid cells (ILCs) are key players during an immune response at the mucosal surfaces, such as lung, skin, and gastrointestinal tract. Giardia lamblia is an extracellular protozoan pathogen that inhabits the human small intestine. In this study, ILCs prepared from the lamina propria of mouse small intestine were incubated with G. lamblia trophozoites. Transcriptional changes in G. lamblia-exposed ILCs resulted in identification of activation of several immune pathways. Secretion of interleukin (IL)-17A, IL-17F, IL-1β, and interferon-γ was increased, whereas levels of IL-13, IL-5, and IL-22, was maintained or reduced upon exposure to G. lamblia. Goup 3 ILC (ILC3) was found to be dominant amongst the ILCs, and increased significantly upon co-cultivation with G. lamblia trophozoites. Oral inoculation of G. lamblia trophozoites into mice resulted in their presence in the small intestine, of which, the highest number of parasites was detected at the 5 days-post infection. Increased ILC3 was observed amongst the ILC population at the 5 days-post infection. These findings indicate that ILC3 from the lamina propria secretes IL-17 in response to G. lamblia, leading to the intestinal pathology observed in giardiasis.
