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Moreno Amor AL, Santos LN, Alcântara Galvão A, Medeiros de Andrade Belitardo EM, Santos Silva E, Alcântara-Neves NM, Pontes-de-Carvalho L. Candidin and trichophytin stimulate the production of Th1 and regulatory cytokines by peripheral blood mononuclear cells: implication for their use as adjuvants in immunotherapy. Immunotherapy 2014; 6:1255-64. [DOI: 10.2217/imt.14.89] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Aim: This study's objective was to investigate whether candidin or trichophytin elicit recall immune responses that could potentially inhibit a Th2 response. Materials & methods: Peripheral blood mononuclear cells from nine allergic and seven nonallergic individuals were cultivated in vitro in the presence or absence of these fungal extracts. Results: Trichophytin or candidin, or both, stimulated the production of regulatory cytokines (TGF-β and/or IL-10), accompanied or not by stimulation of production of cytokines associated with the Th1 response (TNF-α, IL-12 and IFN-γ), but without stimulation of Th2 cytokines (IL-5 and IL-13) and IL-17, by peripheral blood mononuclear cells of most allergic and nonallergic individuals. Conclusion: These results indicate that these fungal extracts could be used as adjuvants in personalized therapeutic vaccines in a fair proportion of individuals. In addition, they justify the carrying out of investigations aimed at identifying molecules in these extracts that might exclusively induce Treg and/or Th1 immune responses.
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Affiliation(s)
- Ana Lúcia Moreno Amor
- Instituto de Ciências da Saúde, Departamento de Biointeração, Laboratório de Alergia e Acarologia, Universidade Federal da Bahia, Avenida Reitor Miguel Calmon, s/n, 40110-902 Canela, Salvador, Bahia, Brazil
- Centro de Ciências da Saúde, Universidade Federal do Recôncavo da Bahia, Campus do Governo, Avenida Carlos Amaral, 1015, 44570-000 Cajueiro, Santo Antônio de Jesus, Bahia, Brazil
| | - Leonardo Nascimento Santos
- Instituto de Ciências da Saúde, Departamento de Biointeração, Laboratório de Alergia e Acarologia, Universidade Federal da Bahia, Avenida Reitor Miguel Calmon, s/n, 40110-902 Canela, Salvador, Bahia, Brazil
| | - Alana Alcântara Galvão
- Instituto de Ciências da Saúde, Departamento de Biointeração, Laboratório de Alergia e Acarologia, Universidade Federal da Bahia, Avenida Reitor Miguel Calmon, s/n, 40110-902 Canela, Salvador, Bahia, Brazil
| | - Emília Maria Medeiros de Andrade Belitardo
- Instituto de Ciências da Saúde, Departamento de Biointeração, Laboratório de Alergia e Acarologia, Universidade Federal da Bahia, Avenida Reitor Miguel Calmon, s/n, 40110-902 Canela, Salvador, Bahia, Brazil
| | - Eduardo Santos Silva
- Instituto de Ciências da Saúde, Departamento de Biointeração, Laboratório de Alergia e Acarologia, Universidade Federal da Bahia, Avenida Reitor Miguel Calmon, s/n, 40110-902 Canela, Salvador, Bahia, Brazil
| | - Neuza Maria Alcântara-Neves
- Instituto de Ciências da Saúde, Departamento de Biointeração, Laboratório de Alergia e Acarologia, Universidade Federal da Bahia, Avenida Reitor Miguel Calmon, s/n, 40110-902 Canela, Salvador, Bahia, Brazil
| | - Lain Pontes-de-Carvalho
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Rua Waldemar Falcão 121, 40296-710, Salvador, Bahia, Brazil
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Ruiz-Riol M, Mothe B, Gandhi RT, Bhardwaj N, Scadden DT, Sanchez-Merino V, Brander C. Influenza, but not HIV-specific CTL epitopes, elicits delayed-type hypersensitivity (DTH) reactions in HIV-infected patients. Eur J Immunol 2013; 43:1545-54. [PMID: 23504637 DOI: 10.1002/eji.201242732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 02/15/2013] [Accepted: 03/08/2013] [Indexed: 01/19/2023]
Abstract
The induction of cytotoxic T lymphocytes (CTLs) is believed to be an important defense mechanism against viral infections. The availability of simple, sensitive, specific and physiologically informative in vivo tests, applicable to humans, would greatly elucidate the nature of protective immune responses and facilitate immune monitoring in large vaccine trials. Here we studied the possibility of using defined HLA-A*02:01-restricted CTL epitopes from influenza matrix protein (GL9, GILGFVFTL) and HIV Gag p17 (SL9, SLYNTVATL) to elicit a cutaneous delayed-type hypersensitivity (DTH) reaction. Our results show that the GL9 but not the SL9 epitope was able to induce a DTH reaction. HIV infection status, HIV RNA level and CD4(+) T-cell counts were not predictive of the extent of DTH reactions. However, a markedly reduced expression of skin homing markers CD103 and cutaneous lymphocyte associated Ag (CLA) on epitope-specific CTL populations was associated with a lack of SL9 DTH reactivity. These data demonstrate that DTH reactions can be elicited by optimally defined CTL epitopes per se and point towards specific homing markers that are required for such reactions. These data may offer new insights into the immune pathogenesis of HIV infection and provide the basis of novel immune monitoring approaches for large-scale HIV vaccine trials.
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Affiliation(s)
- Marta Ruiz-Riol
- IrsiCaixa AIDS Research Institute - HIVACAT, Barcelona, Spain
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