Expansion of T regulatory lymphocytes by murine bone marrow dendritic cells previously stimulated with Anisakis simplex larval antigens
Document title: Expansion of T regulatory lymphocytes by murine bone marrow dendritic cells previously stimulated with Anisakis simplex larval antigens
Journal: Memorias do Instituto Oswaldo Cruz
Database: PERIÓDICA
System number: 000446505
ISSN: 0074-0276
Authors: 1
1
1
2
3
1
Institutions: 1Universidad Complutense de Madrid, Facultad de Farmacia, Madrid. España
2Hospital Arnau de Vilanova, Departamento de Investigación, Valencia. España
3National Institutes of Health, National Institute of Allergy and Infectious Diseases, Rockville, Maryland. Estados Unidos de América
Year:
Volumen: 116
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract BACKGROUND Anisakis simplex antigens present immunomodulatory properties by the induction of tolerogenic dendritic cells (DCs) in mice. OBJECTIVES To study the capacity of DCs stimulated with A. simplex excretory-secretory (ES) or crude extract (CE) to generate Tregs. To investigate in vitro effects of antigens on the metabolic activity of splenocytes induced by LPS or CpG. METHODS Phenotypic and functional characterization of T cells co-cultured with A. simplex-pulsed DCs was performed by flow cytometry. Lymphocyte mitochondrial respiratory activity was estimated by the Alamar Blue® Assay. FINDINGS In C57BL/6J, CD4+CD25-Foxp3+ and CD8+CD25-Foxp3+ populations increased by CE-stimulated-DCs. In BALB/c, CE-stimulated-DCs caused the expansion of CD4+CD25+Foxp3+IL-10+ and CD8+CD25+Foxp3+IL-10+. IFN-γ expression raised in BALB/c CD4+CD25+ and CD4+CD25- for CE and ES, respectively. ES-stimulated-DCs increased CD4+CD25+ Foxp3+ and CD8+CD25- Foxp3+ expression in T cells. The association of ES or CE with LPS produced the increase in splenocyte activity in C57BL/6J. The association of CE with CpG decreased the proliferation caused by CpG in C57BL/6J. MAIN CONCLUSIONS A. simplex increase the frequency of Tregs, which in turn produce IL-10 and IFN-γ. The host genetic base is essential in the development of anti-Anisakis immune responses (Th2, Th1, Treg)
Disciplines: Biología
Keyword: Inmunología,
Ratones,
Linfocitos T,
Respuesta inmune,
Células dendríticas,
Actividad mitocondrial,
Anisakis simplex
Keyword: Immunology,
Mice,
T lymphocytes,
Immune response,
Dendritic cells,
Anisakis simplex,
Mitochondrial activity
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