RESUMO
Extracorporeal procedures for selective removal of low-density lipoproteins have become a promising new approach for treatment of severe familial hypercholesterolemia. We tested efficacy and safety of a new LDL apheresis system by using two dextran sulfate cellulose adsorbents (Liposorber LA 15TM from Kanegafuchi) under the control of an automatic column-regenerating unit for continuous alternate adsorption and desorption. Plasma was taken from a continuous-flow blood cell separator (model IBM/Cobe 2997) allowing an extracorporeal circuit from one cubital vein to another. A 57-year-old male with drug-resistant heterozygous familial hypercholesterolemia accompanied by moderate hypertriglyceridemia and severe coronary artery disease has been treated every 2 weeks for 3 months so far. Treatment of 4-5 liters of plasma resulted in a mean decrease of total cholesterol from 355 to 111 mg/dl (9.20 to 2.88 mmol/l), of LDL cholesterol from 272 to 49 mg/dl (7.05 to 1.53 mmol/l), and of apolipoprotein B from 175 to 44 mg/dl. HDL cholesterol, apolipoprotein A-I, and other plasma proteins did not substantially change apart from hemodilution. No side effects were seen. This new technique of LDL apheresis represents a very effective and safe method for treatment of drug-resistant familial hypercholesterolemia without or with concomitant hypertriglyceridemia.
Assuntos
Remoção de Componentes Sanguíneos/instrumentação , Celulose , Sulfato de Dextrana , Hiperlipoproteinemia Tipo II/terapia , Lipoproteínas LDL/sangue , Adsorção , Arteriosclerose/etiologia , Arteriosclerose/prevenção & controle , Separação Celular/instrumentação , Colesterol/sangue , Cromatografia de Afinidade , Humanos , Hiperlipoproteinemia Tipo II/sangue , Hiperlipoproteinemia Tipo II/complicações , Masculino , Pessoa de Meia-IdadeRESUMO
A series of des-His2 octa- and nonapeptide analogues of luliberin (luteinizing hormone-releasing hormone) with modifications in the 1 and 6 positions, and in some instances the 10 position, has been prepared. Some of these analogues are potent inhibitors of luliberin in vitro and in vivo. The use of ultraviolet absorption measurements for evaluating peptides containing tyrosine and tryptophan is described. An efficient synthesis of O-methyl-d-tyrosine is reported.
