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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo do polimorfismo C2029T no gene do receptor toll-like tipo 2 e da resposta imune humoral em pacientes com hansenÃase / Study of C2029T polymorphism in gene receptor toll-like type 2 and humoral immune response in patients with leprosy

AracÃlia Gurgel Rodrigues 17 December 2008 (has links)
FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / Apesar do empenho do MinistÃrio da SaÃde para a eliminaÃÃo da hansenÃase, o Brasil à o segundo paÃs em nÃmero de casos no mundo, precedido pela Ãndia, e responsÃvel por 80% dos casos no continente americano, sendo o Nordeste do paÃs e, em especial, o Estado do Cearà considerado uma regiÃo de alta endemicidade. De acordo com a classificaÃÃo de Ridley e Jopling, as formas clÃnicas dividem-se em virchowiana, dimorfa-virchowiana, dimorfa-dimorfa, dimorfa-tuberculÃide e tuberculÃide. O trabalho foi realizado com 87 pacientes com hansenÃase, sendo 51,72% do sexo feminino e 48,3% do sexo masculino; destes 87 pacientes, 77,01% vacinados em algum perÃodo da vida entre a infÃncia a adolescÃncia. Os pacientes incluÃdos no estudo encontravam-se nÃo tratados (n=23) ou em tratamento (n=64), apresentando a maioria dos pacientes a hansenÃase pela primeira vez e alguns apresentavam recidiva (n=11). A sorologia de IgG sÃrica anti-PGL1 foi realizada em 83 pacientes, tendo sido as concentraÃÃes de maiores diferenÃas ocorridas entre os grupos com a forma tuberculÃide e dimorfa-tuberculÃide e o grupo com a forma dimorfa-virchowiana. As 87 amostras analisadas foram amplificadas quanto à seqÃÃncia de 171 pb de uma regiÃo altamente conservada dos aminoÃcidos 671-692 do C-terminal no domÃnio intracelular do receptor Toll-like 2 e foi aplicada a tÃcnica de AnÃlise do Polimorfismo Conformacional de Fita Ãnica (SSCP). O perfil eletroforÃtico das amostras testadas encontradas foram de duas e trÃs bandas, mostrando-se necessÃrio o sequenciamento,este apresentou heterozigose marcado pela presenÃa das bases C e T na posiÃÃo C2029T, e alÃm de dois outros perfis de heterozigose nas posiÃÃes C2006T (encontrado em todas as amostras sequenciadas) e T2008G (amostra 82). O trabalho sugere que houve heterozigose na regiÃo do Ãxon 3 do gene do receptor toll-like tipo 2, diferentemente do encontrado por Kang e Chae (2001) o que pode significar que o perfil de suscetibilidade em nossa populaÃÃo à distinta daqueles encontrados na Ãndia e na CorÃia. / Although several efforts from Ministry of Health have been made in order to eliminate leprosy, Brazil is still the second country with the highest number of cases in world after India and is responsible for 80% of the cases in the American continent, the Ceara state situated in the Norheastern region is considered to have high incidence rates of leprosy cases. According to Ridley and Jopling classification, the clinical forms of leprosy can be divided in lepromatous leprosy, borderline lepromatous leprosy, borderline borderline leprosy, borderline tuberculoid leprosy, and tuberculoid leprosy. This work was done with 87 patients with leprosy, being 51.72 % of the female gender and 48.3% of the male gender; from the total of patients, 77.0% had been vaccinated with BCG once in life. All the patients enrolled in the study were not treated (n=23) or in treatment (n=64). Most of the patients had suffered from leprosy for the first time and some (n=11) had suffered from leprosy recidive. The anti-PGL1 serum IgG serology has been performed in 83 patients, and the most significant differences were found comparing the tuberculoid leprosy and borderline tuberculoid leprosy groups with the borderline lepromatous leprosy group. All DNA samples (n=87) were amplified in respect to the 171 bp highly conserved sequence of the aminoacids 671-692 from the C-terminal intra-cellular domain of Toll-like 2 receptor, and they were submitted to a Single Strain Conformation Polymorphism Technique (SSCP). The eletrophoretic profile found of the samples showed two and three bands, it is essential to the sequencing, this showed heterozygosis at position C2029T, and in addition two other sections of heterozygosity at positions C2006T (found in all four sequenced samples) and 2008 (sample 82). The work showed that the heterozygosity found in the gene exon 3 of the tool-like receptor type 2, unlike the one found by Kang and Chae (2001) which may mean that the susceptibility profile from our population is distinct from those found in India and Korea.

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