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(Hypertension. 1996;27:1210-1215.)
© 1996 American Heart Association, Inc.
Articles |
2c10-Adrenergic Receptor Genotype
From the Departments of Medicine (L.P.S., P.Z.T.) and Pediatrics (L.P., Y.-T.C.), Duke University Medical Center, Durham, NC, and National Institutes of Health, Bethesda, Md (N.B.A.).
Abstract The adrenergic receptors have been implicated in the
pathogenesis of essential hypertension. We hypothesized that
hypertension is associated with variants at the
ß2-adrenergic receptor locus and at one of the
2-adrenergic receptor loci. In unrelated individuals, we
measured untreated blood pressure and characterized each subject as
hypertensive or normotensive. We then used genomic DNA to identify
ß2- and
2c10-adrenergic receptor
restriction fragment length polymorphisms. In 175 subjects (49%
with hypertension, 55% black), both hypertension and race were
associated with genotype at the ß2 locus
(
2 for hypertension=11, P=.004;
2 for race=8.8, P=.012). The
association with hypertension persisted in each race group separately
(blacks only:
2=9.6, P=.008; whites
only:
2=14.2, P=.001). This
association persisted in a logistic model that controlled for race
(P=.01). Genotype was also significantly associated
with baseline systolic, diastolic, and mean
arterial blood pressures (P=.05, .01, and .02,
respectively). These data suggest that the ß2-adrenergic
receptor gene is a candidate gene for hypertension in blacks and
whites. We also genotyped subjects at the
2-adrenergic receptor coded on chromosome 10. There was
no association between hypertension and genotype at the
2c10 locus in the total group or in blacks, but there
was significant association in whites
(
2=6.7, P=.03). These data suggest
that the ß2- and
2c10-adrenergic receptor
genes may contribute, in a race-specific manner, to the inheritance
of essential hypertension. Linkage studies in related individuals are
needed to confirm these findings.
Key Words: receptors, adrenergic hypertension, essential genetics race
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