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Olsen L, Åkesson CP, Storset AK, Lacroix-Lamandé S, Boysen P, Metton C, Connelley T, Espenes A, Laurent F, Drouet F. The early intestinal immune response in experimental neonatal ovine cryptosporidiosis is characterized by an increased frequency of perforin expressing NCR1(+) NK cells and by NCR1(-) CD8(+) cell recruitment. Vet Res 2015; 46:28. [PMID: 25890354 PMCID: PMC4355373 DOI: 10.1186/s13567-014-0136-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 12/11/2014] [Indexed: 12/02/2022] Open
Abstract
Cryptosporidium parvum, a zoonotic protozoan parasite, causes important losses in neonatal ruminants. Innate immunity plays a key role in controlling the acute phase of this infection. The participation of NCR1+ Natural Killer (NK) cells in the early intestinal innate immune response to the parasite was investigated in neonatal lambs inoculated at birth. The observed increase in the lymphocyte infiltration was further studied by immunohistology and flow cytometry with focus on distribution, density, cellular phenotype related to cytotoxic function and activation status. The frequency of NCR1+ cells did not change with infection, while their absolute number slightly increased in the jejunum and the CD8+/NCR1- T cell density increased markedly. The frequency of perforin+ cells increased significantly with infection in the NCR1+ population (in both NCR1+/CD16+ and NCR1+/CD16- populations) but not in the NCR1-/CD8+ population. The proportion of NCR1+ cells co-expressing CD16+ also increased. The fraction of cells expressing IL2 receptor (CD25), higher in the NCR1+/CD8+ population than among the CD8+/NCR1- cells in jejunal Peyer’s patches, remained unchanged during infection. However, contrary to CD8+/NCR1- lymphocytes, the intensity of CD25 expressed by NCR1+ lymphocytes increased in infected lambs. Altogether, the data demonstrating that NK cells are highly activated and possess a high cytotoxic potential very early during infection, concomitant with an up-regulation of the interferon gamma gene in the gut segments, support the hypothesis that they are involved in the innate immune response against C. parvum. The early significant recruitment of CD8+/NCR1- T cells in the small intestine suggests that they could rapidly drive the establishment of the acquired immune response.
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Affiliation(s)
- Line Olsen
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Oslo, Norway.
| | - Caroline Piercey Åkesson
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Oslo, Norway.
| | - Anne K Storset
- Department of Food Safety & Infection Biology, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Oslo, Norway.
| | - Sonia Lacroix-Lamandé
- Institut National de la Recherche Agronomique, UMR1282, Infectiologie et Santé Publique, Laboratoire Apicomplexes et Immunité Muqueuse, Nouzilly, France.
| | - Preben Boysen
- Department of Food Safety & Infection Biology, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Oslo, Norway.
| | - Coralie Metton
- Institut National de la Recherche Agronomique, UMR1282, Infectiologie et Santé Publique, Laboratoire Apicomplexes et Immunité Muqueuse, Nouzilly, France.
| | - Timothy Connelley
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK.
| | - Arild Espenes
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Oslo, Norway.
| | - Fabrice Laurent
- Institut National de la Recherche Agronomique, UMR1282, Infectiologie et Santé Publique, Laboratoire Apicomplexes et Immunité Muqueuse, Nouzilly, France.
| | - Françoise Drouet
- Institut National de la Recherche Agronomique, UMR1282, Infectiologie et Santé Publique, Laboratoire Apicomplexes et Immunité Muqueuse, Nouzilly, France.
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Wyatt CR, Riggs MW, Fayer R. Cryptosporidiosis in Neonatal Calves. Vet Clin North Am Food Anim Pract 2010; 26:89-103, table of contents. [DOI: 10.1016/j.cvfa.2009.10.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Harp JA. Cryptosporidium and host resistance: historical perspective and some novel approaches. Anim Health Res Rev 2003; 4:53-62. [PMID: 12885209 DOI: 10.1079/ahrr200352] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cryptosporidium parvum is recognized as a major cause of diarrheal disease in neonatal bovine calves. In addition, this protozoan parasite has emerged as an important cause of disease in both immunocompromised and immunocompetent humans. Despite years of research, no consistently effective means of prevention or treatment are readily available for cryptosporidiosis in any species. Infection through ingestion of contaminated water has been widely documented; C. parvum was reported to be responsible for the largest waterborne outbreak of infectious disease in US history. In addition to its role as a primary disease agent, C. parvum has potential to initiate or exacerbate other gastrointestinal disorders, such as inflammatory bowel disease. Thus, control of C. parvum infection in both animals and humans remains an important objective. Research in our laboratory has focused on understanding mechanisms of resistance to C. parvum. We have demonstrated that acquisition of intestinal flora increases resistance to C. parvum. Substances present in the intestinal mucosa of adult animals can transfer resistance when fed to susceptible infants. Both expression of intestinal enzymes and rate of proliferation of epithelial cells may be altered following C. parvum infection. These and other changes may have profound effects on host resistance to C. parvum.
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Affiliation(s)
- James A Harp
- United States Department of Agriculture, Agricultural Research Service, National Animal Disease Center, 2300 Dayton Avenue, Ames, IA 50010, USA.
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Abstract
An increased understanding of host immune responses to Cryptosporidium parvum which are responsible for clearance of primary infection and resistance to reinfection, and characterization of the parasite molecules to which they are directed, are essential for discovery of effective active and passive immunization strategies against cryptosporidiosis. In this article, recent advances in knowledge of humoral and cellular immune responses to C. parvum, their antigen specificities, and mechanisms of protection are briefly reviewed.
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Affiliation(s)
- Michael W Riggs
- Department of Veterinary Science and Microbiology, Veterinary Science and Microbiology Building, Room 202, College of Agriculture and Life Sciences, University of Arizona, Tucson, AZ 85721, USA.
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Abstract
Cryptosporidium parvum is an important zoonotic protozoan pathogen that causes acute infection and self-limiting gastrointestinal disease in neonatal calves. There are currently no consistently effective antimicrobials available to control cryptosporidiosis. Therefore, immunotherapeutic and vaccination protocols offer the greatest potential for long-term control of the disease. In order to devise effective control measures, it is important to better define mucosal immunity to C. parvum in young calves. This review summarizes the information that has accumulated over the last decade which helps to define the intestinal mucosal immune system in neonatal calves, and the events that occur in the intestinal mucosa after infection by C. parvum.
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Affiliation(s)
- C R Wyatt
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040, USA
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