title: Stability of miR-126 in Urine and Its Potential as a Biomarker for Renal Endothelial Injury with Diabetic Nephropathy.
abstract: Background. The purpose of the present study was to assess the feasibility of using miR-126 in the urine as a biomarker for diabetic nephropathy. Methods. miRNAs were extracted from the urine samples of T2DM patients with diabetic nephropathy (DN; n = 92), T2DM without DN (n = 86), and 85 healthy volunteers using quantitative reverse transcriptase polymerase chain reaction (real-time polymerase chain reaction) analysis. Stability of urinary miR-126 and factors that affected the stability were assessed. A subgroup analysis was also carried out to compare the urinary miR-126 level in T2DM patients well controlled by the treatment versus those who were not well controlled. Results. Urinary miR-126 was stable when the urine samples were kept at room temperature for extended period of time, 4°C, -20°C, and -80°C for up to 12 hours or subjected to 10 freeze-and-thaw cycle. Urinary miR-126 was significantly higher in T2DM patients with DN (5.76 ± 0.33 versus 3.25 ± 0.45 in T2DM patients without DN). Successful treatment significantly reduced urinary miR-126 in T2DM patients with DN to 3.89 ± 0.52 (P < 0.05). Conclusion. miR-126 in the urine is stable and it could be used as a biomarker of DN and to monitor the treatment response.
authors.affiliation: Department of Clinical Biochemistry Laboratory, The 4th Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Clinical Biochemistry Laboratory, The 4th Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
authors.forename: Guangqiang
authors.initials: G
authors.lastname: Gao
authors.affiliation: Department of Clinical Biochemistry Laboratory, The 4th Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Yang
authors.affiliation: Department of Clinical Biochemistry Laboratory, The 4th Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhou
authors.affiliation: Department of Clinical Biochemistry Laboratory, The 4th Affiliated Hospital of Harbin Medical University, Harbin 150001, China ; Heilongjiang Province Key Laboratory of Molecular Image, Harbin 150001, China.
authors.forename: Baozhong
authors.initials: B
authors.lastname: Shen
authors.affiliation: Department of Clinical Biochemistry Laboratory, The 4th Affiliated Hospital of Harbin Medical University, Harbin 150001, China ; Heilongjiang Province Key Laboratory of Molecular Image, Harbin 150001, China.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Liang
authors.affiliation: Department of Clinical Biochemistry Laboratory, The 4th Affiliated Hospital of Harbin Medical University, Harbin 150001, China ; Heilongjiang Province Key Laboratory of Molecular Image, Harbin 150001, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Jiang