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Binding and activation of human and mouse complement by Cryptosporidium parvum (Apicomplexa) and susceptibility of C1q- and MBL-deficient mice to infection
- Source :
- Petry, F, Jakobi, V, Wagner, S, Tessema, T S, Thiel, S & Loos, M 2008, ' Binding and activation of human and mouse complement by Cryptosporidium parvum (Apicomplexa) and susceptibility of C1q-and MBL-deficient mice to infection ', Molecular Immunology, vol. 45, no. 12, pp. 3392-400 . https://doi.org/10.1016/j.molimm.2008.04.010
- Publication Year :
- 2008
-
Abstract
- Cryptosporidium parvum is a protozoan parasite (Apicomplexa) that causes gastrointestinal disease in animals and humans. Whereas immunocompetent hosts can limit the infection within 1 or 2 weeks, immunocompromised individuals develop a chronic, life-threatening disease. The importance of the adaptive cellular immune response, with CD4+ T-lymphocytes being the major players, has been clearly demonstrated. Several non-adaptive immune mechanisms have been suggested to contribute to the host defence, such as interferon-gamma (IFN-gamma) from NK cells, certain chemokines, beta-defensins and pro-inflammatory cytokines, but the influence of the complement systems has been less well studied. We analysed the in vitro binding and activation of the human and mouse complement systems and tested the susceptibility to infection in complement-deficient mouse strains. We found that C. parvum can activate both the classical and lectin pathways, leading to the deposition of C3b on the parasite. Using real-time PCR, parasite development could be demonstrated in adult mice lacking mannan-binding lectin (MBL-A/C-/-) but not in mice lacking complement factor C1q (C1qA-/-) or in wild type C57BL/6 mice. The contribution of the complement system and the lectin pathway in particular to the host defence against cryptosporidiosis may become apparent in situations of immunodeficiency such as HIV infections or in early childhood.
- Subjects :
- Chemokine
Immunology
Protozoan Proteins
Cryptosporidiosis
Complement factor I
Sodium Chloride
Mannose-Binding Lectin
Microbiology
Mice
Immune system
medicine
Animals
Humans
RNA, Messenger
Molecular Biology
Complement Activation
Immunodeficiency
Mannan-binding lectin
Cryptosporidium parvum
biology
Reverse Transcriptase Polymerase Chain Reaction
Complement C1q
Oocysts
Temperature
medicine.disease
biology.organism_classification
Virology
Complement system
Mice, Inbred C57BL
Gene Expression Regulation
Lectin pathway
Complement C3b
biology.protein
Cattle
Disease Susceptibility
Subjects
Details
- ISSN :
- 01615890
- Volume :
- 45
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Molecular immunology
- Accession number :
- edsair.doi.dedup.....9b3b10010b88897bc82143b4811d5152