检验医学 ›› 2012, Vol. 27 ›› Issue (6): 495-499.

• 生物化学检验论著 • 上一篇    下一篇

尿α-L-岩藻糖苷酶对糖尿病早期肾损害的诊断价值

常连刚1,王蕾2   

  1. 肥城矿业中心医院检验科,山东 肥城 271608
  • 收稿日期:2012-01-31 修回日期:2012-02-24 出版日期:2012-06-30 发布日期:2012-06-06
  • 作者简介:常连刚,男,1969年生,学士,副主任技师,主要从事临床生物化学研究。

The diagnosis significance of urine alpha-L-fucosidase for diabetes mellitus early renal injury

  1. Department of Clinical Laboratory,Feicheng Mining Central Hospital,Shandong Feicheng 271608,China
  • Received:2012-01-31 Revised:2012-02-24 Online:2012-06-30 Published:2012-06-06

摘要: 目的 探讨尿α-L-岩藻糖苷酶(AFU)测定在筛查糖尿病(DM)早期肾损害中的临床应用价值。方法 将178例2型DM患者按24 h尿微量白蛋白(mAlb)排泄率分为DM无肾病组(79例)、DM早期肾病组(54例)和DM临床肾病组(45例)。应用本室建立的连续监测法检测178例2型DM患者和320名正常对照者尿AFU、mAlb、尿β2-微球蛋白(β2-MG)、N-乙酰-β-D-氨基葡萄糖苷酶(NAG)含量,并进行比较。结果 采用连续监测法检测尿AFU在300 U/L以下线性良好;高、低浓度样本批内变异系数(CV)分别为1.69%、1.26%,批间CV分别为4.51%、3.52%。维生素C、胆红素和血红蛋白分别为50 mg/L、136.8 μmol /L和1 g/L时对尿AFU不产生干扰。DM组尿AFU、mAlb、β2-MG、NAG分别为(2.87±0.91) U/ g·Cr、(67.62±21.27) mg/g·Cr、(0.48±0.32)mg/ g·Cr、(29.23±8.29)U/ g·Cr,均明显高于正常对照组[(0.82±0.45)U/ g·Cr、(11.54±8.81)mg/ g·Cr、(0.11±0.07)mg/ g·Cr、(9.08±5.21)U/ g·Cr](P<0.01)。DM 3个亚组之间尿AFU、mAlb、β2-MG、NAG差异均有统计学意义(P<0.01)。DM患者尿AFU与NAG呈高度正相关(r=0.859,P<0.01)。79例DM无肾病组尿AFU阳性率高达19.0%,特异性为85.7%,敏感性为91.8%,Youden指数为0.77,诊断效率89.9%。99例DM肾病患者治疗后AFU水平为(2.7±1.26)U/ g·Cr,明显低于治疗前[(4.6±1.72)U/ g·Cr ](P<0.01)。结论 尿AFU测定是筛查DM早期肾损害的一项有价值的指标。

关键词: α-L-岩藻糖苷酶, 尿液分析, 糖尿病, 肾损害

Abstract: Objective To investigate the clinical application significance of urine alpha-L-fucosidase (AFU) for screening early renal injury of diabetes mellitus (DM). Methods The 178 type 2 DM patients were classified into DM without nephropathy group(79 cases),DM with nephropathy in early stage group(54 cases) and clinical DM with nephropathy group (45 cases), according to the 24 h urine microalbumin(mAlb) excretion rate. A total of 178 type 2 DM patients and 320 healthy subjects were enrolled in this study. By the continuous monitoring method established by our laboratory,the urine AFU,urine mAlb,urine beta2-microglobulin(β2-MG) and N-acetyl-beta-D-glucosaminidase(NAG) contents were detected. The results between the 2 groups were analyzed comparatively. Results The linearity of the AFU determination was up to 300 U/L.The within-run coefficients of variation(CV) of high and low AFU concentration samples were 1.69% and 1.26% respectively.The between-run CV of high and low AFU concentration samples were 4.51% and 3.52% respectively.There was no interference for urine AFU when vitamin C, bilirubin and hemoglobin were 50 mg/L,136.8 μmol /L and 1 g/L.Compared with the control group[(0.82±0.45)U/ g·Cr,(11.54±8.81)mg/ g·Cr,(0.11±0.07)mg/ g·Cr and (9.08±5.21)U/ g·Cr],the urine AFU, mAlb,β2-MG and NAG significantly increased [(2.87±0.91)U/ g·Cr,(67.62±21.27) mg/ g·Cr, (0.48±0.32) mg/ g·Cr and (29.23±8.29) U/ g·Cr] in DM group (P<0.01). The urine AFU,mAlb,β2-MG and NAG among the 3 groups of patients with DM were statistically significant (P<0.01), and the urine AFU was positively correlated with NAG in patients with DM(r=0.859,P<0.01). In the DM without nephropathy group, the positive rate of urine AFU was 19.0%,with specificity 85.7%,sensitivity 91.8%,Youden index 0.77 and diagnostic efficiency 89.9%.The level of urine AFU after the treatment in the DM with nephropathy group (99 cases)[(2.7±1.26)U/ g·Cr] was significantly lower than that before the treatment[(4.6±1.72)U/ g·Cr](P<0.01). Conclusions The determination of urine AFU is a valuable indicator for screening early renal injury of DM.

Key words: Alpha-L-fucosidase, Urine analysis, Diabetes mellitus, Renal injury