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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2010.tde-16122010-101612
Document
Author
Full name
Edgar Borges de Oliveira Júnior
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Condino Neto, Antonio (President)
Ferriani, Virginia Paes Leme
Franco, Marcelo de
Kokron, Cristina Maria
Nunes, Anderson de Sá
Title in Portuguese
Uma nova abordagem para o estudo dos defeitos genético-moleculares da doença granulomatosa crônica e análise de suas relações genótipo-fenótipo.
Keywords in Portuguese
dHPLC
Doença granulomatosa crônica
Doenças genéticas
Fagócitos
Gene CYBB
Gene NCF1
Genética molecular
Granuloma
Imunologia
NADPH oxidase
Abstract in Portuguese
A Doença Granulomatosa Crônica é uma imunodeficiência grave e rara, na qual os quadros infecciosos por bactérias e fungos, ocorrem predominantemente nas barreiras naturais do organismo. O defeito reside em mutações em um dos componentes do sistema NADPH oxidase. O dHPLC mostrou-se mais sensível que o SSCP, sendo eficaz na detecção de alterações em 100% dos casos. Identificamos sete mutações diferentes no gene CYBB, sendo quatro delas inéditas. São elas R226X; R290X; e C537R. Dentre as mutações inéditas identificamos: T302fsX46; c.141 +5 G> T; C185R; e H222L. Identificamos a mutação V25fsX51 no gene NCF1 em duas pacientes. Estabelecemos uma correlação entre genótipo e fenótipo clínico baseado em manifestações clínicas relevantes na DGC, nos fornecendo dados importantes de cada manifestação clínica e um índice de gravidade clínica (IGC) para cada tipo de mutação. Os resultados contribuem para a construção de estratégias que permitam a identificação dos defeitos genético-moleculares relacionados à DGC.
Title in English
A new approach to study of molecular-genetic defects of chronic granulomatous disease and analysis of its genotype-phenotype relationships.
Keywords in English
CYBB gene
NCF1 gene
Chronic granulomatous disease
dHPLC
Genetic Diseases
Granuloma
Immunology
Molecular Genetics
NADPH oxidase
Phagocytes
Abstract in English
Chronic granulomatous disease is a primary immunodeficiency characterized by recurrent and severe infections, affecting the body barriers. In these patients, phagocytes present a failure in the respiratory burst caused by a deficiency of the NADPH oxidase system, and a microbicidal defect. Mutations affecting one of the components of the NADPH oxidase system. The dHPLC proved to be more sensitive to the SSCP, being effective in detecting changes in 100% of cases. We found seven different mutations, four of which are original. Are they R226X; R290X; and C537R. Among the unpublished mutations identified: T302fsX46; c. 141 + 5 G > T; C185R; and H222L. We identify the gene mutation V25fsX51 NCF1 in two patients. We have established a correlation between genotype and phenotype clinical relevant clinical manifestations based on DGC in providing important data from each clinical and clinical severity index (CSI) for each type of mutation. The results contribute to the construction of strategies enabling the identification of molecular genetic defects related to CGD.
 
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Publishing Date
2011-03-02
 
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