PMID- 30112873 OWN - NLM STAT- Publisher LR - 20240228 IS - 2233-6079 (Print) IS - 2233-6079 (Linking) DP - 2018 May 2 TI - Glycated Albumin Is a More Useful Glycation Index than HbA1c for Reflecting Renal Tubulopathy in Subjects with Early Diabetic Kidney Disease. AB - BACKGROUND: The aim of this study was to investigate which glycemic parameters better reflect urinary N-acetyl-beta-D-glucosaminidase (uNAG) abnormality, a marker for renal tubulopathy, in subjects with type 2 diabetes mellitus (T2DM) subjects with normoalbuminuria and a normal estimated glomerular filtration rate (eGFR). METHODS: We classified 1,061 participants with T2DM into two groups according to uNAG level-normal vs. high (>5.8 U/g creatinine)-and measured their biochemical parameters. RESULTS: Subjects with high uNAG level had significantly higher levels of fasting and stimulated glucose, glycated albumin (GA), and glycosylated hemoglobin (HbA1c) and lower levels of homeostasis model assessment of beta-cell compared with subjects with normal uNAG level. Multiple linear regression analyses showed that uNAG was significantly associated with GA (standardized beta coefficient [beta]=0.213, P=0.016), but not with HbA1c (beta=-0.137, P=0.096) or stimulated glucose (beta=0.095, P=0.140) after adjusting confounding factors. In receiver operating characteristic analysis, the value of the area under the curve (AUC) for renal tubular injury of GA was significantly higher (AUC=0.634; 95% confidence interval [CI], 0.646 to 0.899) than those for HbA1c (AUC=0.598; 95% CI, 0.553 to 0.640), stimulated glucose (AUC=0.594; 95% CI, 0.552 to 0.636), or fasting glucose (AUC=0.558; 95% CI, 0.515 to 0.600). The optimal GA cutoff point for renal tubular damage was 17.55% (sensitivity 59%, specificity 62%). CONCLUSION: GA is a more useful glycation index than HbA1c for reflecting renal tubulopathy in subjects with T2DM with normoalbuminuria and normal eGFR. CI - Copyright (c) 2018 Korean Diabetes Association. FAU - Huh, Ji Hye AU - Huh JH AD - Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea. FAU - Lee, Minyoung AU - Lee M AD - Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea. FAU - Park, So Young AU - Park SY AD - Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. FAU - Kim, Jae Hyeon AU - Kim JH AUID- ORCID: 0000-0001-5001-963X AD - Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. jaehyeon@skku.edu. FAU - Lee, Byung Wan AU - Lee BW AUID- ORCID: 0000-0002-9899-4992 AD - Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea. bwanlee@yuhs.ac. LA - eng PT - Journal Article DEP - 20180502 PL - Korea (South) TA - Diabetes Metab J JT - Diabetes & metabolism journal JID - 101556588 OTO - NOTNLM OT - Diabetes mellitus, type 2 OT - Glycated hemoglobin A OT - Glycosylated serum albumin OT - Kidney tubules COIS- No potential conflict of interest relevant to this article was reported. EDAT- 2018/08/17 06:00 MHDA- 2018/08/17 06:00 CRDT- 2018/08/17 06:00 PHST- 2017/12/05 00:00 [received] PHST- 2018/02/05 00:00 [accepted] PHST- 2018/08/17 06:00 [entrez] PHST- 2018/08/17 06:00 [pubmed] PHST- 2018/08/17 06:00 [medline] AID - 42.e11 [pii] PST - aheadofprint SO - Diabetes Metab J. 2018 May 2.