Can melamine levels in 1-spot overnight urine specimens predict the total previous 24-hour melamine excretion level in school children?

被引：35

作者：

Lin, Yi-Ting ^{[1
,2
]}

Tsai, Meng-Tian ^{[2
]}

Chen, Yi-Ling ^{[2
,3
]}

Cheng, Ching-Mei ^{[2
,4
]}

Hung, Chun-Chi ^{[2
,4
]}

Wu, Chia-Fang ^{[2
]}

Liu, Chia-Chu ^{[5
,6
,7
]}

Hsieh, Tusty-Jiuan ^{[8
]}

Shiea, Jentaie ^{[9
]}

Chen, Bai-Hsiun ^{[10
,11
]}

Wu, Ming-Tsang ^{[1
,2
,12
]}

机构：

[1] Kaohsiung Med Univ Hosp, Dept Family Med, Kaohsiung, Taiwan

[2] Kaohsiung Med Univ, Dept Publ Hlth, Kaohsiung, Taiwan

[3] Kaohsiung Med Univ Hosp, Dept Lab Med, Kaohsiung, Taiwan

[4] Kaohsiung Municipal Hsiaokang Hosp, Dept Lab Med, Kaohsiung, Taiwan

[5] Kaohsiung Med Univ, Kaohsiung Med Univ Hosp, Dept Urol, Kaohsiung, Taiwan

[6] Kaohsiung Med Univ, Coll Med, Fac Med, Dept Urol, Kaohsiung, Taiwan

[7] Pingtung Hosp, Dept Hlth, Executive Yuan, Pingtung, Taiwan

[8] Kaohsiung Med Univ, Coll Med, Dept Med Genet, Kaohsiung, Taiwan

[9] Natl Sun Yat Sen Univ, Dept Chem, Kaohsiung 80424, Taiwan

[10] Kaohsiung Med Univ, Kaohsiung Med Univ Hosp, Dept Pediat, Kaohsiung, Taiwan

[11] Kaohsiung Med Univ, Coll Med, Fac Med, Dept Pediat, Kaohsiung, Taiwan

[12] Kaohsiung Municipal Hsiaokang Hosp, Ctr Environm & Occupat Med, Kaohsiung, Taiwan

来源：

CLINICA CHIMICA ACTA | 2013年 / 420卷

关键词：

Melamine; Urine; Toxicity; N-acetyl-beta-D-glucosaminidase; Microalbumin; BETA-D-GLUCOSAMINIDASE; MASS-SPECTROMETRY; INDUCED NEPHROLITHIASIS; STONE FORMATION; KIDNEY-DISEASE; YOUNG-CHILDREN; RENAL-DISEASE; NEPHROTOXICITY; BETA-2-MICROGLOBULIN; UROLITHIASIS;

D O I：

10.1016/j.cca.2012.10.024

中图分类号：

R446 [实验室诊断]; R-33 [实验医学、医学实验];

学科分类号：

1001 ;

摘要：

Background: We investigated whether melamine concentrations in 1-spot overnight urine sample can represent the previous 8- and 24-h total urinary melamine excretions in school children. The relationship between urinary melamine levels and several clinical biomarkers of early renal injury such as microalbumin and N-acetyl-beta-D-glucosaminidase (NAG) in urine was also examined. Methods: School children, aged 6-10 y, and their parents who were healthy and lived closely to Kaohsiung Medical University-affiliated hospitals were recruited. All study children had the first 1-spot overnight urine sample collected on the Sunday morning (the first day) immediately when they woke up, and then all the subsequent urine samples continued to be collected until the first 1-spot overnight urine sample on the morning of the next day (Monday, the second day). Two first 1-spot overnight urine samples from their parents on the same Sunday and Monday mornings were also collected. This protocol was completed in the July and August of 2011. All urine samples were measured for melamine, biomarkers of early renal injury, and creatinine. Results: There were 7 girls and 16 boys in this study. Except for one missing urine sample from 1-spot overnight urine sample on the morning of the second day, melamine levels in the rest of urine samples among the study children were all detectable. The median melamine levels of 1-spot overnight urine samples on the first and second day mornings were 0.93 and 1.73 mu g/mmol of creatinine respectively. We found that melamine concentrations of 1-spot overnight urine samples on the second day morning were highly correlated with the previous 8- and 24-h total melamine excretions in urine (r = 0.936, p<0.001, n = 21 and r = 0.616, p<0.001, n = 21 respectively). Good correlation of 1-spot overnight urine sample on the first and second day mornings was also found (r = 0.619, p = 0.003, n = 21). In contrast, there were no significant correlations of 24-h total urinary melamine and 24-h total urinary microalbumin and NAG excretions (r = -0.221, p = 0.319, n = 22 and r = 0.084, p = 0.710, n = 22). Conclusion: Melamine levels in 1-spot overnight urine sample can predict the previous 8- and 24-h total melamine excretions in urine. Since melamine exposure levels in these school children were relatively low, its association with clinical biomarkers of-early renal injury was not found. A future study is necessary to increase the sample size and to find the more sensitive preclinical biomarkers of renal injury to link with low melamine exposure in children in the community. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：128 / 133

页数：6