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  • Title: [Association of alpha-adducin and angiotensin converting enzyme gene polymorphisms with salt-sensitive hypertension and early renal injury].
    Author: Lu LH, Chen H, Yu L.
    Journal: Zhonghua Yi Xue Yi Chuan Xue Za Zhi; 2008 Apr; 25(2):132-5. PubMed ID: 18393230.
    Abstract:
    OBJECTIVE: To investigate the association between the alpha-adducin gene G460T, angiotensin converting enzyme (ACE) insertion/deletion (I/D) polymorphisms and salt-sensitive hypertension and early renal injury in Chinese people. METHODS: The case-control study was performed in 200 essential hypertension (EH) and 200 normal control subjects in China. The 200 EH patients were divided into salt-sensitive(SS= 109) and non-salt-sensitive(NSS= 91) groups according to modified Sullivan's method. The genotypes of alpha-adducin gene were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The ACE genotypes were determined by PCR. The urine microalbum (Alb) in 200 EH subjects was measured by radioactive immunoassay. RESULTS: (1) A higher frequency of alpha-adducin gene G460T TT in EH patients was observed (P< 0.05). No significant difference of the ACE gene I/D polymorphism was found between the EH patients and normal control (P> 0.05). There were significant differences in the alpha-adducin gene TT genotype and combined genotype of TT+ II between SS and NSS subjects (P< 0.05). (2) The levels of urine Alb/Cr in SS patients were significantly higher than that in NSS patients (P< 0.05); in SS group, the levels of urine Alb/Cr in ACE II and alpha-adducin gene TT genotypes were higher than that in ACE ID, DD genotype and alpha-adducin gene GT and GG genotypes. The levels of urine Alb/Cr in the group of alpha-adducin gene TT+ ACE II combined genotype were higher than that in other combined genotypes (P< 0.05). CONCLUSION: The alpha-adducin gene TT genotype or combined with ACE II are significantly associated with SS hypertension. The alpha-adducin gene TT and ACE II genotypes might be genetic susceptibility factors to hypertension accompanying renal injury.
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