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Association analyses of Nsi I RFLP of human insulin receptor gene in hypertensives
Author(s) -
Schrader Andrew P.,
Zee Robert Y. L.,
Morris Brian J.
Publication year - 1996
Publication title -
clinical genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.543
H-Index - 102
eISSN - 1399-0004
pISSN - 0009-9163
DOI - 10.1111/j.1399-0004.1996.tb04331.x
Subject(s) - medicine , insulin resistance , endocrinology , restriction fragment length polymorphism , insulin , essential hypertension , genotype , insulin receptor , allele , blood pressure , exon , biology , gene , genetics
Plasma angiotensinogen is elevated in essential hypertensives and shows a strong correlation with blood pressure. Patients with hypertension often display insulin resistance and we have found previously an association of a Rsal RFLP in intron 9 of the insulin receptor gene (INSR) with hypertension. Since insulin resistance is accompanied by hyperinsulinaemia and insulin can stimulate angiotensinogen production, we hypothesized that hypertension‐associated genotypes of INSR may be associated with elevation in plasma angiotensinogen. We used PCR to detect a N sil RFLP in exon 8 of INSR and examined its relationship with plasma angiotensinogen, as well as hypertension, in 134 Caucasian hypertensives with two hypertensive parents and in 126 normotensives. Plasma angiotensinogen tracked weakly with the major allele of the N sil RFLP in hypertensives (p=0.08). Moreover, the frequency of this allele was higher in lean hypertensives than in lean normotensives (p<0.05) and in normolipidaemic hypertensives than normolipidaemic normotensives (p<0.02). The present study thus suggests that there could be a relationship of plasma angiotensinogen with INSR genotype, and of each with hypertension.