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13.06.2017 | Original Article | Ausgabe 5/2017

Journal of Inherited Metabolic Disease 5/2017

Tight metabolic control plus ACE inhibitor therapy improves GSD I nephropathy

Zeitschrift:
Journal of Inherited Metabolic Disease > Ausgabe 5/2017
Autoren:
Gyongyi O. Okechuku, Lawrence R. Shoemaker, Monika Dambska, Laurie M. Brown, Justin Mathew, David A. Weinstein
Wichtige Hinweise
Communicated by: Bridget Wilcken

Abstract

The onset of microalbuminuria (MA) heralds the onset of glomerulopathy in patients with glycogen storage disease (GSD) type I. Unlike tubulopathy, which responds to improved metabolic control, glomerulopathy in GSD I is considered refractory to medical intervention, and it is thought to inexorably progress to overt proteinuria and renal failure. Recent reports of reduced microalbuminuria following strict adherence to therapy counter this view. In contrast to type Ia, little is known regarding the prevalence of kidney disease in GSD Ib, 0, III, VI, and IX. Subjects were evaluated with 24-h urine collections between 2005 and 2014 as part of a longitudinal study of the natural history of GSD. ACE inhibitor therapy (AIT) was commenced after documentation of microalbuminuria. Elevated urine albumin excretion was detected in 23 of 195 GSD Ia patients (11.7%) and six of 45 GSD Ib (13.3%). The median age of onset of microalbuminuria in GSD Ia was 24 years (range 9–56); in GSD Ib it was 25 years (range 20–38). Of 14 with GSD Ia who complied with dietary and AIT during the study period, microalbuminuria decreased in 11, in whom metabolic control improved. All 135 patients with the ketotic forms of GSD (0, III, VI and IX) consistently had normal microalbumin excretion. Strict adherence to dietary therapy and maintenance of optimal metabolic control is necessary to halt the progression of GSD Ia glomerulopathy in patients treated with AIT. With optimal care, protein excretion can be reduced and even normalize.

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