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Fontoura IC, Trombone APF, Almeida LP, Lorenzi JCC, Rossetti RAM, Malardo T, Padilha E, Schluchting W, Silva RLL, Gembre AF, Fiuza JEC, Silva CL, Panunto-Castelo A, Coelho-Castelo AAM. B cells expressing IL-10 mRNA modulate memory T cells after DNA-Hsp65 immunization. ACTA ACUST UNITED AC 2015; 48:1095-100. [PMID: 26397973 PMCID: PMC4661025 DOI: 10.1590/1414-431x20154409] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Accepted: 06/30/2015] [Indexed: 11/26/2022]
Abstract
In DNA vaccines, the gene of interest is cloned into a bacterial plasmid that is
engineered to induce protein production for long periods in eukaryotic cells.
Previous research has shown that the intramuscular immunization of BALB/c mice with a
naked plasmid DNA fragment encoding the Mycobacterium leprae 65-kDa
heat-shock protein (pcDNA3-Hsp65) induces protection against M.
tuberculosis challenge. A key stage in the protective immune response
after immunization is the generation of memory T cells. Previously, we have shown
that B cells capture plasmid DNA-Hsp65 and thereby modulate the formation of
CD8+ memory T cells after M. tuberculosis challenge in
mice. Therefore, clarifying how B cells act as part of the protective immune response
after DNA immunization is important for the development of more-effective vaccines.
The aim of this study was to investigate the mechanisms by which B cells modulate
memory T cells after DNA-Hsp65 immunization. C57BL/6 and BKO mice were injected three
times, at 15-day intervals, with 100 µg naked pcDNA-Hsp65 per mouse. Thirty days
after immunization, the percentages of effector memory T (TEM) cells (CD4+
and CD8+/CD44high/CD62Llow) and memory
CD8+ T cells
(CD8+/CD44high/CD62Llow/CD127+) were
measured with flow cytometry. Interferon γ, interleukin 12 (IL-12), and IL-10 mRNAs
were also quantified in whole spleen cells and purified B cells (CD43−)
with real-time qPCR. Our data suggest that a B-cell subpopulation expressing IL-10
downregulated proinflammatory cytokine expression in the spleen, increasing the
survival of CD4+ TEM cells and CD8+ TEM/CD127+
cells.
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Affiliation(s)
- I C Fontoura
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | | | - L P Almeida
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - J C C Lorenzi
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - R A M Rossetti
- Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, SP, Brasil
| | - T Malardo
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - E Padilha
- Universidade Paranaense, Cascavel, PR, Brasil
| | - W Schluchting
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - R L L Silva
- Departamento de Educação em Saúde, Universidade Federal de Sergipe, Lagarto, SE, Brasil
| | - A F Gembre
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - J E C Fiuza
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - C L Silva
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - A Panunto-Castelo
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - A A M Coelho-Castelo
- Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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Pinto GR, Yoshioka FKN, Silva RLL, Clara CA, Santos MJ, Almeida JRW, Burbano RR, Rey JA, Casartelli C. Prognostic value of TP53 Pro47Ser and Arg72Pro single nucleotide polymorphisms and the susceptibility to gliomas in individuals from Southeast Brazil. Genet Mol Res 2008; 7:207-16. [PMID: 18393224 DOI: 10.4238/vol7-1gmr415] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The TP53 tumor suppressor gene codifies a protein responsible for preventing cells with genetic damage from growing and dividing by blocking cell growth or apoptosis pathways. A common single nucleotide polymorphism (SNP) in TP53 codon 72 (Arg72Pro) induces a 15-fold decrease of apoptosis-inducing ability and has been associated with susceptibility to human cancers. Recently, another TP53 SNP at codon 47 (Pro47Ser) was reported to have a low apoptosis-inducing ability; however, there are no association studies between this SNP and cancer. Aiming to study the role of TP53 Pro47Ser and Arg72Pro on glioma susceptibility and oncologic prognosis of patients, we investigated the genotype distribution of these SNPs in 94 gliomas (81 astrocytomas, 8 ependymomas and 5 oligodendrogliomas) and in 100 healthy subjects by the polymerase chain reaction-restriction fragment length polymorphism approach. Chi-square and Fisher exact test comparisons for genotype distributions and allele frequencies did not reveal any significant difference between patients and control groups. Overall and disease-free survivals were calculated by the Kaplan-Meier method, and the log-rank test was used for comparisons, but no significant statistical difference was observed between the two groups. Our data suggest that TP53 Pro47Ser and Arg72Pro SNPs are not involved either in susceptibility to developing gliomas or in patient survival, at least in the Brazilian population.
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Affiliation(s)
- G R Pinto
- Laboratório de Genética Humana e Biologia Molecular, Universidade Federal do Piauí, Parnaíba, PI, Brasil.
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