BACKGROUND: Xba I polymorphism in the apolipoprotein (apo) B gene has often been studied in connection with myocardial infarction, coronary artery disease and plasma lipid concentrations. The X2 allele (restriction site present) is often mentioned as a disadvantageous one. Low birth weight has also been described as a risk factor for hyperlipidemia. OBJECTIVE: To study the Xba I polymorphism in the apo B gene. PATIENTS AND METHODS: Southern blot or polymerase chain reaction was used in two groups of children (low and high cholesterolemic, 82 and 86 children, respectively), selected from 2000 children with known birth weight. RESULTS: In the subgroup of high cholesterolemic children with birth weight under 3.00 kg, the X1/X1 (P=0.056) genotype was found at a lower frequency. No similar association was shown in low cholesterolemic children. CONCLUSION: Xba I polymorphism is in a strong linkage disequilibrium with Ala (591) --> Val polymorphism in apo B, which influences postprandial lipemia and so, possibly, intrauterine nutrition and, consequently, birth weight. These results suggest that, in lower birth weight probands, X1/X1 homozygosity of Xba I polymorphism in the apo B gene may protect against the development of hypercholesterolemia, at least in childhood.
BACKGROUND: Xba I polymorphism in the apolipoprotein (apo) B gene has often been studied in connection with myocardial infarction, coronary artery disease and plasma lipid concentrations. The X2 allele (restriction site present) is often mentioned as a disadvantageous one. Low birth weight has also been described as a risk factor for hyperlipidemia. OBJECTIVE: To study the Xba I polymorphism in the apo B gene. PATIENTS AND METHODS: Southern blot or polymerase chain reaction was used in two groups of children (low and high cholesterolemic, 82 and 86 children, respectively), selected from 2000 children with known birth weight. RESULTS: In the subgroup of high cholesterolemic children with birth weight under 3.00 kg, the X1/X1 (P=0.056) genotype was found at a lower frequency. No similar association was shown in low cholesterolemic children. CONCLUSION: Xba I polymorphism is in a strong linkage disequilibrium with Ala (591) --> Val polymorphism in apo B, which influences postprandial lipemia and so, possibly, intrauterine nutrition and, consequently, birth weight. These results suggest that, in lower birth weight probands, X1/X1 homozygosity of Xba I polymorphism in the apo B gene may protect against the development of hypercholesterolemia, at least in childhood.
Authors: A Law; S C Wallis; L M Powell; R J Pease; H Brunt; L M Priestley; T J Knott; J Scott; D G Altman; G J Miller Journal: Lancet Date: 1986-06-07 Impact factor: 79.321
Authors: R A Hegele; L S Huang; P N Herbert; C B Blum; J E Buring; C H Hennekens; J L Breslow Journal: N Engl J Med Date: 1986-12-11 Impact factor: 91.245
Authors: P J Talmud; N Barni; A M Kessling; P Carlsson; C Darnfors; G Bjursell; D Galton; V Wynn; H Kirk; M R Hayden Journal: Atherosclerosis Date: 1987-09 Impact factor: 5.162
Authors: Caroline Ponzio; Zaira Palomino; Rosana Fiorini Puccini; Maria Wany L Strufaldi; Maria C P Franco Journal: Eur J Pediatr Date: 2013-08-03 Impact factor: 3.183