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Gulani J, Norbury CC, Bonneau RH, Beckwith CS. The effect of Helicobacter hepaticus infection on immune responses specific to herpes simplex virus type 1 and characteristics of dendritic cells. Comp Med 2009; 59:534-544. [PMID: 20034428 PMCID: PMC2798839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Revised: 08/06/2009] [Accepted: 10/05/2009] [Indexed: 05/28/2023]
Abstract
Infection of mice with Helicobacter hepaticus is common in research colonies, yet little is known about how this persistent infection affects immunologic research. The goal of this study was to determine whether H. hepaticus infection status can modulate immune responses specific to herpes simplex virus type 1 (HSV1) and the phenotypic and functional characteristics of dendritic cells (DC) of mice. We compared virus-specific antibody and T cell-mediated responses in H. hepaticus-infected and noninfected mice that were inoculated intranasally with HSV1. The effect of H. hepaticus on the HSV1-specific antibody and T cell-mediated immune responses in superficial cervical and tracheobronchal lymph nodes (LN) did not reach statistical significance. Surface expression of the maturation-associated markers CD40, CD80, CD86, and MHC II and percentages of IL12p40- and TNFalpha-producing DC from spleen and colic LN in H. hepaticus-infected mice and noninfected mice were measured in separate experiments. Expression of CD40, CD86, and MHC II and percentages of IL12p40- and TNFalpha-producing DC from colic LN were decreased in H. hepaticus-infected mice. In contrast, H. hepaticus infection did not reduce the expression of these molecules by splenic DC. Expression of CD40, CD80, CD86, and MHC II on splenic DC from H. hepaticus-infected mice was increased after in vitro lipopolysaccharide stimulation. These results indicate that H. hepaticus infection can influence the results of immunologic assays in mice and support the use of H. hepaticus-free mice in immunologic research.
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Affiliation(s)
- Jatinder Gulani
- Departments of Comparative Medicine, Penn State Hershey College of Medicine, Hershey, Pennsylvania
| | - Christopher C Norbury
- Microbiology and Immunology, Penn State Hershey College of Medicine, Hershey, Pennsylvania
| | - Robert H Bonneau
- Microbiology and Immunology, Penn State Hershey College of Medicine, Hershey, Pennsylvania
| | - Catherine S Beckwith
- Departments of Comparative Medicine, Penn State Hershey College of Medicine, Hershey, Pennsylvania
- Microbiology and Immunology, Penn State Hershey College of Medicine, Hershey, Pennsylvania
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Maciel M, Kellathur SN, Chikhlikar P, Dhalia R, Sidney J, Sette A, August TJ, Marques ET. Comprehensive analysis of T cell epitope discovery strategies using 17DD yellow fever virus structural proteins and BALB/c (H2d) mice model. Virology 2008; 378:105-17. [PMID: 18579176 PMCID: PMC2615555 DOI: 10.1016/j.virol.2008.04.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 04/07/2008] [Accepted: 04/30/2008] [Indexed: 01/19/2023]
Abstract
Immunomics research uses in silico epitope prediction, as well as in vivo and in vitro approaches. We inoculated BALB/c (H2d) mice with 17DD yellow fever vaccine to investigate the correlations between approaches used for epitope discovery: ELISPOT assays, binding assays, and prediction software. Our results showed a good agreement between ELISPOT and binding assays, which seemed to correlate with the protein immunogenicity. PREDBALB/c prediction software partially agreed with the ELISPOT and binding assay results, but presented low specificity. The use of prediction software to exclude peptides containing no epitopes, followed by high throughput screening of the remaining peptides by ELISPOT, and the use of MHC-biding assays to characterize the MHC restrictions demonstrated to be an efficient strategy. The results allowed the characterization of 2 MHC class I and 17 class II epitopes in the envelope protein of the YF virus in BALB/c (H2d) mice.
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Affiliation(s)
- Milton Maciel
- Johns Hopkins University, School of Medicine, Pharmacology Department, Baltimore, USA
| | - Srinivasan N. Kellathur
- Johns Hopkins University, School of Medicine, Pharmacology Department, Baltimore, USA,Johns Hopkins Singapore, Singapore
| | - Pryia Chikhlikar
- Johns Hopkins University, School of Medicine, Pharmacology Department, Baltimore, USA
| | - Rafael Dhalia
- Oswaldo Cruz Foundation (FIOCRUZ), Instituto Aggeu Magalhaes, Recife, Brazil
| | | | | | - Thomas J. August
- Johns Hopkins University, School of Medicine, Pharmacology Department, Baltimore, USA
| | - Ernesto T.A. Marques
- Johns Hopkins University, School of Medicine, Pharmacology Department, Baltimore, USA,Johns Hopkins, School of Medicine, Department of Infectious Diseases, Baltimore, USA,Oswaldo Cruz Foundation (FIOCRUZ), Instituto Aggeu Magalhaes, Recife, Brazil,Corresponding author. Johns Hopkins University, School of Medicine, Pharmacology Department, Baltimore, USA
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