检验医学 ›› 2019, Vol. 34 ›› Issue (7): 626-629.DOI: 10.3969/j.issn.1673-8640.2019.07.012

• 临床应用研究·论著 • 上一篇    下一篇

尿液水通道蛋白2在肾小管功能损伤评价中的价值

王雪颖1, 刘欢1, 周详2, 杨若凡3, 王春娥1, 麻莲1, 白碧峰1, 李锋1()   

  1. 1.空军军医大学第一附属(西京)医院中医科暨全军中医内科中心,陕西 西安 710032
    2.空军军医大学第一附属(西京)医院核医学科,陕西 西安 710032
    3.空军军医大学第一附属(西京)医院检验科,陕西 西安 710032
  • 收稿日期:2018-04-19 出版日期:2019-07-30 发布日期:2019-07-25
  • 作者简介:null

    作者简介:王雪颖,女,1991年生,技师,主要从事中医“证”本质与中药效应机理研究。

  • 基金资助:
    国家自然科学基金项目(81273622)

Role of urinary aquaporin 2 in evaluating proximal tubular injury

WANG Xueying1, LIU Huan1, ZHOU Xiang2, YANG Ruofan3, WANG Chun'e1, MA Lian1, BAI Bifeng1, LI Feng1()   

  1. 1. Department of Traditional Chinese Medicine and Internal Medicine,the First Affiliated Hospital(Xijing Hospital) of Air Force Military Medical University,Xi'an 710032,Shaanxi,China
    2. Department of Nuclear Medicine,the First Affiliated Hospital(Xijing Hospital) of Air Force Military Medical University,Xi'an 710032,Shaanxi,China
    3. Department of Clinical Laboratory,the First Affiliated Hospital(Xijing Hospital) of Air Force Military Medical University,Xi'an 710032,Shaanxi,China
  • Received:2018-04-19 Online:2019-07-30 Published:2019-07-25

摘要:

目的 探讨尿液水通道蛋白2(AQP2)在肾小管功能损伤评价中的价值。方法 选取高血压性肾病患者70例(肾病组),根据有无水肿分为水肿组(38例)和非水肿组(32例),以353名体检健康者作为正常对照组。收集所有对象的一般资料并检测尿AQP2、尿α1-微球蛋白(α1-MG)、尿β2-微球蛋白(β2-MG)、血清肌酐(SCr)、血清胱抑素C(Cys C)水平。采用受试者工作特性(ROC)曲线评估尿AQP2对肾小管功能损伤的诊断价值。结果 353名正常对照者尿AQP2呈偏态分布,其水平为9.42(6.96~13.95)ng/mL。采用百分位数法建立尿AQP2的参考区间,为<19.11 ng/mL。肾病组尿AQP2水平明显高于正常对照组(P<0.01)。肾病患者中水肿组尿α1-MG、尿β2-MG、尿AQP2水平均明显高于非水肿组(P< 0.01),而2个组之间BMI、SCr、血清Cys C水平差异均无统计学意义(P>0.05)。ROC曲线分析显示,尿AQP2诊断肾病和肾病水肿的曲线下面积(AUC)分别为0.93、0.83,最佳临界值分别为18.12、26.93 ng/mL,敏感性分别为81.43%、71.05%,特异性分别为92.63%、81.25%;尿α1-MG和尿β2-MG诊断肾病水肿的AUC分别为0.80和0.69。尿AQP2、α1-MG和β2-MG联合检测诊断肾病水肿的AUC为0.91,敏感性为86.84%,特异性为87.50%。结论 尿液AQP2可作为评价肾小管功能损伤的敏感指标。

关键词: 水通道蛋白2, 尿液, 肾小管损伤, 肾病

Abstract:

Objective To investigate the role of urinary aquaporin 2(AQP2) in evaluating proximal tubular injury. Methods A total of 353 healthy subjects were enrolled as healthy control group,and 70 hypertensive nephrotic patients were enrolled and classified into edema group(38 cases) and non-edema group(32 cases). Their general data were collected,and urinary AQP2,urinary alpha1-microglobulin(α1-MG),beta2-microglobulin(β2-MG),serum creatinine(SCr),serum cystatin C(Cys C) levels were determined. Receiver operating characteristic(ROC) curve was used to evaluate the role of urinary AQP2 for the diagnosis of proximal tubular injury. Results Urinary AQP2 showed skewed distribution,and its level was 9.42(6.96-13.95) ng/mL. The reference interval was ≤19.11 ng/mL. The level of urinary AQP2 in nephrotic group was higher than that in healthy control group(P<0.01),and the levels of urinary AQP21-MG and β2-MG in edema group were higher than those in non-edema group(P<0.01). There was no statistical significance for body mass index(BMI),SCr,serum Cys C between the 2 groups(P>0.05). ROC curve analysis showed that the areas under the curves(AUC) for the diagnosis of kidney disease and edema were 0.93 and 0.83,the optimal cut-off values were 18.12 and 26.93 ng/mL,the sensitivities were 81.43% and 71.05%,and the specificities were 92.63% and 81.25%,respectively. The AUC of α1-MG and β2-MG for the diagnosis of edema were 0.80 and 0.69,respectively. The AUC of urinary AQP2 combined with α1-MG and β2-MG for the detection of nephrotic edema is 0.91,the sensitivity is 86.84%,and the specificity is 87.50%. Conclusions Urinary AQP2 can be used as a sensitive indicator in evaluating proximal tubular injury.

Key words: Aquaporin 2, Urine, Proximal tubular injury, Kidney disease

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