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Clin Chim Acta. 1976 Sep 20;71(3):461-8.

Changes in serum and urinary myo-inositol levels in chronic glomerulonephritis.


Serum and urinary myo-inositol and urinary glucose were estimated by means of gas-liquid chromatography in 54 patients with glomerulonephritis with and without renal failure. myo-Inositol clearance was calculated and an index was formulated which reflected changes in glomerular filtration, tubular reabsorption and catabolism of myo-inositol by the kidney. Serum and urinary myo-inositol levels were increased in glomerulonephritis with a close correlation to the degree of renal failure. In advanced forms of glomerulonephritis, glomerular filtration, tubular reabsorption and catabolism of myo-inositol were shown to be markedly deranged. Evidence obtained showed further that a derangement of tubular reabsorption and catabolism of myo-inositol also accompany milder forms of glomerulonephritis without decreased glomerular filtration. The myo-inositol index value, especially, was increased in patients with signs of disease activity as indicated by a histological examination of the kidney tissue. The index can also be regarded as a highly sensitive test of renal failure. Low grade glucosuria was shown to be frequently associated with glomerulonephritis with renal failure. Evidence was produced which suggested that the tubular reabsorption of myo-inositol was deranged earlier than glucose reabsorption in glomerulonephritis, although they may share a common step in the reabsorption process. The data suggest that the estimation of serum and urinary myo-inositol has advantages in the evaluation of kidney function.

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