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. 1969 Oct;48(10):1845–1854. doi: 10.1172/JCI106150

Familial renal glycosuria: a genetic reappraisal of hexose transport by kidney and intestine

Louis J Elsas 1,2, Leon E Rosenberg 1,2
PMCID: PMC322420  PMID: 5822589

Abstract

Renal glucose titration studies were carried out in 10 members of two pedigrees with familial renal glycosuria to test the accepted hypothesis of autosomal dominant inheritance and to investigate the genetic significance of “type A” and “type B” renal glycosuria. In one family, a brother and sister each had a moderately reduced threshold and tubular maximum for glucose (type A), but both of their parents reabsorbed glucose normally. In the second family, two brothers had severe type A renal glycosuria, their mother and one brother had a mild type A defect, and another brother demonstrated a reduced threshold, an exaggerated splay, and a normal tubular maximum, indicative of type B glycosuria.

Hexose transport by intestinal mucosa was also investigated in controls and in the three brothers with the most severe renal glycosuria. D-glucose-14C and 3-O-methylglucose-14C were accumulated by jejunal mucosa from controls by processes which were saturable and concentrative. No differences in hexose transport were observed in the patients with renal glycosuria.

We conclude that familial renal glycosuria can be inherited as an autosomal recessive trait; that mild and severe type A renal glycosuria and type B renal glycosuria can occur in the same pedigree; and that defective reabsorption of glucose by the kidney need not be accompanied by abnormalities in intestinal glucose transport. These findings indicate that glucose transport in the gut and kidney are not mediated by identical mechanisms, and that several different mutations are responsible for the phenotypic variability in familial renal glycosuria.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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