[Association between gene polymorphism of calcium/calmodulin-dependent kinase 4 and efficacy of amlodipine in the treatment of hypertension in Chinese Han nationality].
OBJECTIVE
To evaluate the association between single nucleotide polymorphisms of calcium/calmodulin-dependent kinase 4 (CAMK4) and the therapeutic effect of amlodipine in essential hypertensive patients in Chinese Han nationality.


METHODS
A total of 108 mild-to-moderate essential hypertension patients in Chinese Han nationality were treated with amlodipine for 8 weeks at a dosage of 5 mg/d. Polymerase chain reaction-restriction fragment length polymorphism was performed to detect the genotypes (rs10491334). Blood pressure was measured and analyzed.


RESULTS
The result of rs10491334 polymorphism of CAMK4 was consistent with Hardy-Weinberg equilibrium distribution and the frequencies of C allele and T allele were 88.89% and 11.11%, respectively. The systolic blood pressure and diastolic blood pressure before amlodipine treatment were not statistically different among different genotype carriers (P>0.05). The blood pressure was significantly reduced in all patients after amlodipine treatment (P<0.05). Systolic blood pressure was significantly decreased in patients with rs10491334 CC genotype and CT genotype compared with those patients with rs10491334 TT genotype. Total effective rates of CT and TT carriers were higher than those of the CC genotype carriers (P<0.01).


CONCLUSIONS
The CAMK4 gene polymorphism might be associated with the efficacy of calcium channel blocker in treating mild-to-moderate essential hypertension patients.
Internatioal Medical Center, Xiangya Hospital, Central South University, Changsha 410008, China.
Guangwei
G
Zhong
Internatioal Medical Center, Xiangya Hospital, Central South University, Changsha 410008, China.
Yusi
Y
Chen
Internatioal Medical Center, Xiangya Hospital, Central South University, Changsha 410008, China.
Lihua
L
Liu
Internatioal Medical Center, Xiangya Hospital, Central South University, Changsha 410008, China.
Yingzhe
Y
Liu
Internatioal Medical Center, Xiangya Hospital, Central South University, Changsha 410008, China.
Liu
L
Yang
Internatioal Medical Center, Xiangya Hospital, Central South University, Changsha 410008, China.
Yanli
Y
Luo
Internatioal Medical Center, Xiangya Hospital, Central South University, Changsha 410008, China.
Jiamei
J
Yao
D000483:Alleles; D017311:Amlodipine; D044466:Asian People; D001794:Blood Pressure; D054734:Calcium-Calmodulin-Dependent Protein Kinase Type 4; D002147:Calmodulin; D000075222:Essential Hypertension; D005006:Ethnicity; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D006973:Hypertension; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide
D002147:Calmodulin; D017311:Amlodipine; C517683:CAMK4 protein, human; D054734:Calcium-Calmodulin-Dependent Protein Kinase Type 4