Genotype/Phenotype Analysis in 67 Chinese Patients with Gitelman's Syndrome

被引:56
作者
Liu, Ting [1 ,2 ]
Wang, Cui [1 ,2 ]
Lu, Jingru [1 ,2 ]
Zhao, Xiangzhong [1 ]
Lang, Yanhua [2 ]
Shao, Leping [1 ,2 ]
机构
[1] Qingdao Univ, Affiliated Hosp, Cent Lab, 16 Jiangsu Rd, Qingdao 266003, Peoples R China
[2] Qingdao Univ, Affiliated Hosp, Dept Nephrol, 16 Jiangsu Rd, Qingdao 266003, Peoples R China
关键词
Gitelman's syndrome; Genotype; Phenotype; Follow-up; SLC12A3; gene; CHLORIDE CHANNEL GENE; NA-CL COTRANSPORTER; DIABETES-MELLITUS; SLC12A3; MUTATIONS; BARTTERS-SYNDROME; BLOOD-PRESSURE; IN-VITRO; INSULIN; PREVALENCE; EXPRESSION;
D O I
10.1159/000448694
中图分类号
R5 [内科学]; R69 [泌尿科学(泌尿生殖系疾病)];
学科分类号
1002 ; 100201 ;
摘要
Background: Gitelman's syndrome (GS) is an autosomal recessive renal tubular disorder, which is caused by the mutations in SLC12A3. This study was designed to analyze the characteristics of the genotype and phenotype, and followup in the largest group of Chinese patients with GS. Methods: Sixty-seven patients with GS underwent SLC12A3 analysis, and their clinical characteristics and biochemical findings as well as follow-up were reviewed, aiming to achieve a better description of GS. Additionally, the association of genotype and phenotype was explored. Results: Forty-one different mutations were identified within these 67 GS patients, including 11 novel mutations and 5 recurrent ones. Typical hypocalciuria and hypomagnesemia were not found in 6 (9%) and 8 (11.9%) patients, respectively. Male patients and those harboring severe mutations in both alleles had significant higher urinary fractional excretion (FE) of potassium, magnesium and chlorine. In addition, there were 2 patients who had chronic kidney disease (estimated glomerular filtration rate <60 ml/min/1.73 m(2)) and 32 patients with abnormal glucose metabolism. Conclusions: We identified 41 mutations related to GS, containing 11 novel variants and 5 high-frequency ones, which should facilitate earlier and more accurate diagnosis of GS. FE of electrolytes in urine may be more sensitive in the phenotype evaluation and differential diagnosis than corresponding serum electrolytes. Hypokalemia and hypomagnesemia in GS were difficult to correct; however, spironolactone might be helpful for hypokalemia to some degree. Compared with normal people, patients with GS were at higher risk of developing type 2 diabetes. (C) 2016 S. Karger AG, Basel
引用
收藏
页码:159 / 168
页数:10
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