ISSN:
1432-198X
Keywords:
Glycogen storage disease
;
Hyperfiltration
;
Proteinuria
;
Hypercalciuria
;
Tubular function
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Urinary protein and calcium excretion were assessed in 77 patients with the hepatic glycogen storage diseases (GSD): 30 with GSD-I (median age 12.4 years, range 3.2–32.9 years), 25 with GSD-III (median age 10.5 years, range 4.2–31.3 years) and 22 with GSD-IX (median age 11.8 years, range 1.2–35.4 years). Inulin (C inulin) and para-aminohippuric acid (C PAH) clearances were also measured in 33 of these patients. Those with GSD-I had significantly greater albumin (F=15.07,P〈0.001), retinolbinding protein (RBP) (F=14.66,P〈0.001),N-acetyl-β-d glucosaminidase (NAG) (F=9.41,P〈0.001) and calcium (F=7.41,P=0.001) excretion than those with GSD-III and GSD-IX. GSD-I patients (n=18) also had significantly higherC inulin (F=5.57,P=0.009), butC PAH did not differ (F=0.77, NS). Renal function was normal in GSD-III and GSD-IX patients. In GSD-I,C inulin (r=−0.51,P=0.03) and NAG excretion (r=−0.40,P=0.03) were inversely correlated with age, whereas albumin excretion was positively correlated with age (r=+0.41,P=0.03). RBP and calcium excretion were generally high throughout all age groups. Hyperfiltration in GSD-I is associated with renal tubular proteinuria that occurs before the onset of significant albuminuria. Deficiency of glucose-6-phosphatase within the proximal renal tubule may primarily cause tubular dysfunction, glomerular hyperfiltration being a secondary phenomenon.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00868717
Permalink