PRE-ECLAMPSIA: UM MODELO IN VIVO DE PERDA DE PROTECÇAO PELAS HDL

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Os nossos resultados indicam que mulheres pré-eclâmpticas apresentando níveis baixos de HDL poderão perder protecção mediante o envolvimento dos sistemas inflamatório e hemostático
belo9.jpg Autor:
Belo, luis
Columnista Experto de SIIC

Institución:
Facultad de Farmacia Universidad do Porto Porto, Portugal


Artículos publicados por Belo, luis
Coautores
Alice Santos-Silva. Irene Rebelo*  Muriel Caslake**  Gordon Lowe***  Ann Rumley**  Luís Pereira-Leite****  Alexandre Quintanilha***** 
Professoras Auxiliares Faculdade de Farmácia e Instituto de Biologia Molecular e Celular da Universidade do Porto*
PhD Royal Infirmary, University of Glasgow**
MD, FRCP Royal Infirmary, University of Glasgow***
Professor Catedrático Faculdade de Medicina da Universidade do Porto, Hospital de S. João****
Professor Catedrático Instituto de Ciências Biomédicas Abel Salazar e Instituto de Biologia Molecular e Celular da Universidade do Porto*****
Recepción del artículo
27 de Mayo, 2004
Aprobación
15 de Septiembre, 2004
Primera edición
5 de Noviembre, 2004
Segunda edición, ampliada y corregida
7 de Junio, 2021

Resumen
A gravidez humana está associada a hiperlipidémia fisiológica marcada (com um perfil tipo "aterogénico") que é normalmente bem tolerada pela mãe; entre outras modificações, o aumento na concentração de lipoproteínas de alta densidade (HDL) durante a gravidez normal poderá ajudar a conferir protecção à mãe. Contudo, em gravidezes de elevado risco, como na pré-eclampsia (PE), o controlo da hiperlipidémia poderá não funcionar correctamente. A PE é uma alteração hipertensiva característica da gravidez humana, potencialmente perigosa para a mãe e para o feto. Embora os mecanismos exactos que desencadeiam esta síndrome permaneçam por esclarecer, a dislipidémia e a activação de leucócitos poderão contribuir para o desenvolvimento de stresse oxidativo e disfunção vascular observados na PE. Uma situação frequentemente observada na PE é o nível reduzido de HDL e verificámos existir uma correlação inversa e significativa entre os níveis de apolipoproteína (apo) A-I, o maior constituinte proteico das HDL, e marcadores de activação do neutrófilo (lactoferrina e elástase) assim como com o D-dímero (um produto de degradação da fibrina). Os nossos resultados indicam que mulheres pré-eclâmpticas apresentando níveis baixos de HDL poderão perder protecção mediante o envolvimento dos sistemas inflamatório e hemostático.

Palabras clave
HDL, inflamação, coagulação, gravidez normal, pré-eclampsia


Artículo completo

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Abstract
Human pregnancy is associated with pronounced physiological hyperlipidaemia (with an "atherogenic-like" profile) that is usually well tolerated by the mother; among other changes, the increase in the concentration of high-density lipoprotein (HDL) particles during normal pregnancy may help to confer protection to the mother. However, in complicated pregnancies, such as pre-eclampsia (PE), the control of hyperlipidaemia may be disturbed. PE is a typical hypertensive disorder of human pregnancy, being potentially dangerous for both the mother and the fetus. Although the exact mechanisms leading to this syndrome remain to be clarified, dyslipidaemia and activated leukocytes may contribute to oxidative stress and vascular dysfunction observed in PE. One of the features often observed in PE is the reduced HDL level, and we found a significant inverse correlation between the concentrations of apolipoprotein (apo) A-I, the major protein constituent of HDL, and markers of neutrophil activation (lactoferrin and elastase) as well as with fibrin D-dimer. We believe that pre-eclamptic women presenting low levels of HDL may lose protection involving the inflammatory and haemostatic systems.

Key words
HDL, inflammation, coagulation, normal pregnancy, pre-eclampsia


Clasificación en siicsalud
Artículos originales > Expertos de Iberoamérica >
página   www.siicsalud.com/des/expertocompleto.php/

Especialidades
Principal: Obstetricia y Ginecología
Relacionadas: Bioquímica, Endocrinología y Metabolismo, Medicina Interna, Medicina Reproductiva



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Belo, Luis
Patrocinio y reconocimiento:
Agradecimentos: Os autores desejam agradecer a Laura Pereira, Maria Ondina, Dorothy Bedford e Grace Stewart pelo apoio técnico e à Universidade do Porto bem como à Fundação para a Ciência e a Tecnologia (FCT-Portugal) pelo apoio financeiro (PRAXIS XXI/BD/16061/98).
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