Oxidized low-density lipoprotein and lipoprotein(a) levels in chronic kidney disease patients under hemodialysis: influence of adiponectin and of a polymorphism in the apolipoprotein(a) gene

Sandra Ribeiro, Maria do Sameiro Faria, Gil Silva, Henrique Nascimento, Petronila Rocha-Pereira, Vasco Miranda, Emília Vieira, Rosário Santos, Denisa Mendonça, Alexandre Quintanilha, Elísio Costa, Luís Belo*, Alice Santos-Silva

*Autor correspondente para este trabalho

Resultado de pesquisarevisão de pares

21 Citações (Scopus)

Resumo

Chronic kidney disease (CKD) has been associated with an abnormal lipid profile. Our aim was to study the interplay between oxidized low-density lipoprotein (ox-LDL), adiponectin, and blood lipids and lipoproteins in Portuguese patients with CKD under hemodialysis (HD); the influence of the pentanucleotide repeat polymorphism in the apolipoprotein(a) (apo [a]) gene upon lipoprotein(a) (Lp[a]) levels in these patients. We studied 187 HD patients and 25 healthy individuals. ox-LDL and adiponectin were measured using enzyme-linked immunoassays. Apo(a) genotyping was performed by polymerase chain reaction, followed by electrophoresis in polyacrylamide gel. Compared with controls, patients presented with significantly higher levels of adiponectin, Lp(a), and ox-LDL/low-density lipoprotein cholesterol (LDLc) ratio; significantly lower levels of total cholesterol (TC), LDLc, apo A-I, apo B, ox-LDL, and TC/high-density lipoprotein cholesterol (HDLc) ratio were also observed. Similar changes were observed for patients with or without statin therapy, as compared with controls, except for Lp(a). Multiple linear regression analysis showed that body mass index, HDLc, time on HD, and triglycerides (TG) were independent determinants of adiponectin levels, and that apo B, TG and LDLc were independent determinants of ox-LDL concentration. Concerning the apo(a) genotype, the homozygous (TTTTA)8/8 repeats was the most prevalent (50.8%). A raised proportion of LDL particles that are oxidized was observed. Adiponectin almost doubled its values in patients and seems to be an important determinant in HDLc and TG levels, improving the lipid profile in these patients. Apo(a) alleles with a lower number of repetitions are more frequent in patients with higher Lp(a).
Idioma originalEnglish
Páginas (de-até)481-490
Número de páginas10
RevistaHemodialysis International
Volume16
Número de emissão4
DOIs
Estado da publicaçãoPublicado - out. 2012

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