Association of genetic polymorphisms of endothelin-converting enzyme-1 gene with hypertension in a Japanese population and rare missense mutation in preproendothelin-1 in Japanese hypertensives.
Endothelin-1 (EDN1), a 21-amino acid peptide, is a potent vasoconstrictor with various pharmacological responses. EDN1 is synthesized from a 212-amino acid precursor protein, preproEDN1, through multiple proteolytic steps. Endothelin-converting enzyme (ECE) cleaves a Trp73-Val74 peptide bond in big-EDN1 to give rise to mature EDN1. In this study, we examined the possible association of genetic variations in ECE1 with hypertension in a general Japanese population and searched for missense mutations in and around the EDN1 polypeptide. We genotyped 5 single nucleotide polymorphisms (SNPs) in the ECE1 gene in 1,873 individuals from a general Japanese population and identified one SNP associated with hypertension in women (rs212528: TT vs. TC+CC: odds ratio=1.40; 95% confidence intervals: 1.04-1.89; p=0.026), after adjusting for confounding factors. The systolic blood pressure in women with the CC genotype was 6.44 mmHg higher than that in those with the TT genotype (p=0.007), after adjusting for the same factors. Next, to identify the missense mutations that may influence the biological activity of EDN1, we sequenced the genomic region that encodes EDN1 in 942 Japanese hypertensive patients. We identified a novel missense mutation, G36R, in one hypertensive patient, but no mutations were observed in EDN1. A gene polymorphism in EDN1, Lys198Asn, has been reported to be associated with hypertension in obese subjects. Taken together, these findings reveal that the EDN-ECE pathway is an important system involved in essential hypertension in Japanese.
Banno
Mariko
M
Research Institute, National Cardiovascular Center, Suita, Japan.
Hanada
Hironori
H
Kamide
Kei
K
Kokubo
Yoshihiro
Y
Kada
Akiko
A
Yang
Jin
J
Tanaka
Chihiro
C
Takiuchi
Shin
S
Horio
Takeshi
T
Matayoshi
Tetsutaro
T
Yasuda
Hisayo
H
Nagura
Junko
J
Tomoike
Hitonobu
H
Kawano
Yuhei
Y
Miyata
Toshiyuki
T
D000368:Aged; D000595:Amino Acid Sequence; D044466:Asian People; D016282:Aspartic Acid Endopeptidases / Q000235:genetics*; D019332:Endothelin-1 / Q000235:genetics*; D000072396:Endothelin-Converting Enzymes; D005260:Female; D005838:Genotype; D006801:Humans; D006973:Hypertension / Q000235:genetics*; D008297:Male; D008666:Metalloendopeptidases / Q000235:genetics*; D008875:Middle Aged; D020125:Mutation, Missense; D020641:Polymorphism, Single Nucleotide; D017422:Sequence Analysis, DNA
D019332:Endothelin-1; D016282:Aspartic Acid Endopeptidases; D008666:Metalloendopeptidases; C000606923:ECE1 protein, human; D000072396:Endothelin-Converting Enzymes