Urinary N-acetyl beta glucosaminidase and gamma glutamyl transferase as early markers of diabetic nephropathy. |
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| Authors: | Vivek Ambade Parduman Sing B L Somani Dashrath Basanna |
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| Institution: | (1) Department of Biochemistry, Armed Forces Medical College, 411040 Pune, (India);(2) Preventive and Social Medicine, Armed Forces Medical College, 411040 Pune, (India) |
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| Abstract: | Albumin and enzymes-N-acetyl-beta-glucosaminidase (NAG) and gamma glutamyl transferase (GGT) were estimated in the morning
random urine samples of 196 albustix negative diabetic patients to evaluate the clinical utility of these urinary enzymes
as early markers of diabetic nephropathy. Albumin was estimated by immunoturbidimetric method and enzymes by linetic essay
within six hours of voiding of urine. The urinary albumin and urinary enzyme concentration was calculated in terms of ratio
with respect to urinary creatinine. Correlation coefficient (r) bewween urinary albumin and urinary enzymes in normoalbuminuric,
microalbuminuric and overall diabetic cases was 0.23, 0.32 and 0.40 respectively for NAG, and 0.08, 0.06 and 0.18 respectively
for GGT. NAG excretion was found increased in 34%, 63.7% and 49.5% of normoalbuminuric, microalbuminuric and overall diabetic
cases respectively while GGT in 6.4%, 24.5% and 15.8%. The correlation coefficient between urinary albumin and NAG in normoalbuminuric,
microalbuminuric, and overall diabetic patients with increased NAG excretion was found only 0.31, 0.27 and 0.35 respectively.
No correlation was found between duration of diabetes and enzyme excretion. The study suggests that urinary NAG or GGT or
both together do not have any clinical significance as an early marker of diabetic nephropathy. |
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| Keywords: | Microalbuminuria Diabetic nephropathy N-acetyl-beta-glucosaminidase Gamma glutamyl transferase |
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