Diss. (sammanfattning) Stockholm : Karolinska institutet, 2007. / Härtill 4 uppsatser.

Diss. (sammanfattning) Umeå : Univ., 2005. / Härtill 5 uppsatser.

Diss. (sammanfattning) Stockholm : Karol. inst., 2003. / Härtill 4 uppsatser.

Diss. (sammanfattning) Stockholm : Karolinska institutet, 2007. / Härtill 3 uppsatser.

Thesis (Ph. D.)--University of Virginia, 1998. / Spine title: Molecular structure of Der p 2. Includes bibliographical references (p. 147-167). Also available online through Digital Dissertations.

Thesis (Ph. D.)--University of Missouri-Columbia, 2006. / Title from title screen of research.pdf file (viewed December 22, 2006). The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Vita. "May 2006" Includes bibliographical references.

Background: Asthma affects 5.4 million people in the UK. Asthma subgroups are also susceptible to inhalation of fungal spores (Aspergillus fumigatus) and development of pulmonary fungal aspergilloma; presenting a life threatening but poorly understood condition. NHS costs for corticosteroids, bronchodilators and antifungal agents that are only partially effective continue to rise. Allergy immunotherapy development is of great interest as it is specific to the allergen and can harness key adaptive immune T-cells to down-regulate inflammatory responses. Immunotherapy has been used with varying degrees of success for treatment of grass, pollen, venom, cat and dog allergens however to date has not been directed to fungal allergens. The study aims were: 1) to further understand the A. fumigatus allergens and the protein epitopes responsible for generating immune responses. 2) To genotype participating ABPA/SAFS patients to observe any HLA associations. Methods: 37 subjects with fungal sensitivity were recruited to the study which received permission from the local ethics committee (UHSM LREC). Computer bioinformatic predictions using Propred software identified several potential fungal T cell peptide epitopes; of which 8 peptides were soluble and tested in vitro for specific T-cell proliferation responses by flow cytometric analysis. Skin prick tests determined subject responses to fungal allergens including A. fumigatus, and DNA analysis determined subject HLA type. Results: 5 of 8 soluble peptides were Aspergillus fumigatus derived and 3 from Alternaria alternata. All 8 peptides induced higher CD4 proliferative responses in ABPA/SAFS patients, compared to healthy controls from highest significance to lowest as follows: peptide 1.1 > 9.1 > 8.1 > 2.1 > 9.1.1 > 4.1 > 4.1.1 and 10.1.1. 73% subjects elicited skin responses to A. fumigatus. DNA HLA typing identified alleles associated with ABPA/SAFS but not all allele sub types. Discussion: The ABPA/SAFS group consistently raised T-cell responses to fungal peptides compared to controls. This demonstrates peripheral CD4s retain memory for fungal specificity and clearly respond when challenged with fungal epitopes in vitro. This concept underpins the rationale to further characterize the responding CD4 cells and pursuing bioinformatics approaches for immunotherapy investigations for fungal allergy.

Made available in DSpace on 2016-08-12T18:48:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-12-03. Added 1 bitstream(s) on 2016-08-12T18:51:10Z : No. of bitstreams: 1 000864610.pdf: 3089089 bytes, checksum: e31156d3741c67e09c6b97faabdaf165 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Photobacterium damselae subsp. piscicida (Phdp) é importante agente causal de septicemia e pseudotuberculose, respectivamente nas fases aguda e crônica em peixes marinhos. O método de imunização e tratamento das infecções bacterianas em peixes é limitado à imunização ativa, com demanda bioenergética celular para gerar a resposta imune humoral. O uso de antibióticos na água, como forma terapêutica, resulta em resíduos na carne do peixe e no consumidor final humano, favorecendo o desenvolvimento da resistência microbiana. Este estudo teve como objetivos a produção e purificação de anticorpos IgY policlonais, extraídos da gema do ovo de galinha e específicos para as proteínas citoplasmáticas e de membrana bacteriana de Phdp e seus efeitos no controle da sepse aguda em Rachycentron canadum infectados experimentalmente. Os resultados demonstram redução do acúmulo de células na inflamação aguda induzida, pela inoculação da bactéria homóloga na cavidade celomática e na atividade respiratória de leucócitos sanguíneos nos grupos que receberam anticorpos IgY 48 horas e 15 dias antes do desafio. Verificou-se ainda redução da disseminação bacteriana em fígado, rim, baço e coração que foi correlacionada com a diminuição das lesões renais e hepáticas e demonstrada no perfil bioquímico e histopatológico. Os resultados são promissores no que tange ao uso da imunoglobulina Y como método profilático e na imunoterapia de infecções bacterianas em organismos aquáticos / The Photobacterium damselae ssp. piscicida is an important causative agent of septicemia and pseudotuberculosis in the acute and chronic phases in marine fish, respectively. The method for immunization and treatment of bacterial infections in fish is limited to the active immunization, which demands cellular bioenergy to generate humoral immune response. The use of antibiotics in the water as a form of therapy results in residues in the meat that will be consumed by humans, favoring the development of microbial resistance. Thus, the aim of the study was to produce and purify polyclonal IgY, specific for membrane proteins of P. damselae ssp. piscicida (PMBphdp), extracted from the yolk of laying hens, and to observe its effects on the control of acute sepsis in experimentally infected Rachycentron canadus. The results showed reduction of cell accumulation in acute inflammation induced by inoculation of the homologous bacteria in the coelomic cavity and decrease in the respiratory activity of blood leukocytes in groups receiving IgY antibodies at 48 hours and 15 days before the challenge. It was also observed the reduction of bacterial dissemination to the liver, kidney and heart which was correlated with the decrease in liver and kidney damage, which was demonstrated by the biochemical and histopathological profile. The results are promising regarding the use of immunoglobulin Y as prophylactic method and for immunotherapy of microbial infections in aquatic organisms

Orientador: Flávio Ruas de Moraes / Coorientador: Julieta Rodini Engrácia de Moraes / Coorientador: Hélio Jose Montassier / Coorientador: João Martins Pizauro Junior / Banca: Fernanda Nogueira Valentin / Banca: Tereza Cristina Ribeiro Dias Koberstein / Banca: Solange de Paula Ramos / Banca: Marcello Pardi de Castro / Resumo: Photobacterium damselae subsp. piscicida (Phdp) é importante agente causal de septicemia e pseudotuberculose, respectivamente nas fases aguda e crônica em peixes marinhos. O método de imunização e tratamento das infecções bacterianas em peixes é limitado à imunização ativa, com demanda bioenergética celular para gerar a resposta imune humoral. O uso de antibióticos na água, como forma terapêutica, resulta em resíduos na carne do peixe e no consumidor final humano, favorecendo o desenvolvimento da resistência microbiana. Este estudo teve como objetivos a produção e purificação de anticorpos IgY policlonais, extraídos da gema do ovo de galinha e específicos para as proteínas citoplasmáticas e de membrana bacteriana de Phdp e seus efeitos no controle da sepse aguda em Rachycentron canadum infectados experimentalmente. Os resultados demonstram redução do acúmulo de células na inflamação aguda induzida, pela inoculação da bactéria homóloga na cavidade celomática e na atividade respiratória de leucócitos sanguíneos nos grupos que receberam anticorpos IgY 48 horas e 15 dias antes do desafio. Verificou-se ainda redução da disseminação bacteriana em fígado, rim, baço e coração que foi correlacionada com a diminuição das lesões renais e hepáticas e demonstrada no perfil bioquímico e histopatológico. Os resultados são promissores no que tange ao uso da imunoglobulina Y como método profilático e na imunoterapia de infecções bacterianas em organismos aquáticos / Abstract: The Photobacterium damselae ssp. piscicida is an important causative agent of septicemia and pseudotuberculosis in the acute and chronic phases in marine fish, respectively. The method for immunization and treatment of bacterial infections in fish is limited to the active immunization, which demands cellular bioenergy to generate humoral immune response. The use of antibiotics in the water as a form of therapy results in residues in the meat that will be consumed by humans, favoring the development of microbial resistance. Thus, the aim of the study was to produce and purify polyclonal IgY, specific for membrane proteins of P. damselae ssp. piscicida (PMBphdp), extracted from the yolk of laying hens, and to observe its effects on the control of acute sepsis in experimentally infected Rachycentron canadus. The results showed reduction of cell accumulation in acute inflammation induced by inoculation of the homologous bacteria in the coelomic cavity and decrease in the respiratory activity of blood leukocytes in groups receiving IgY antibodies at 48 hours and 15 days before the challenge. It was also observed the reduction of bacterial dissemination to the liver, kidney and heart which was correlated with the decrease in liver and kidney damage, which was demonstrated by the biochemical and histopathological profile. The results are promising regarding the use of immunoglobulin Y as prophylactic method and for immunotherapy of microbial infections in aquatic organisms / Doutor

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