Atividade das enzimas NTPDASE e 5 - nucleotidase em plaquetas de gestantes normais e de alto risco

Detalhes bibliográficos
Ano de defesa: 2006
Autor(a) principal: Leal, Claudio Alberto Martins
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
BR
Análises Clínicas e Toxicológicas
UFSM
Programa de Pós-Graduação em Ciências Farmacêuticas
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/5916
Resumo: Hemostasis is a complex process that involves equilibrium between the coagulation and fibrinolytic systems. Furthermore, the spatial and temporal expression of NTPDases in the vasculature appears to control platelet activation, thrombus size and stability, by regulating phosphohydrolytic activity and consequent P2 receptor signaling. Here we show the activity of ectonucleotidases on the platelet surface of normal pregnant women and pregnant women with complications. The activities of the enzymes, NTPDase and 5 - nucleotidase, were analyzed in the platelets of four patient groups composed of women divided into the following way: nonpregnant (NP), pregnant without complications (P), pregnant with hypertension (HP) (preeclampsia) and pregnant with gestational diabetes mellitus (GDP). Increased NTPDase and 5 -nucleotidase activities were observed in the groups of P, HP and GDP when compared to control (p<0.01). Ectonucleotidase activity in platelets from group P, HP and GDP were enhanced, showing that pregnancy with and without complications enhanced ATP, ADP and AMP hydrolysis. This fact is very important to corroborate with the thromboregulatory role of this enzyme in physiological and pathological conditions.