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. 2017 Sep;40(5):703-708.
doi: 10.1007/s10545-017-0054-2. Epub 2017 Jun 13.

Tight metabolic control plus ACE inhibitor therapy improves GSD I nephropathy

Gyongyi O Okechuku  1 , Lawrence R Shoemaker  1 , Monika Dambska  2   3 , Laurie M Brown  2 , Justin Mathew  2 , David A Weinstein  4   5   6
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Tight metabolic control plus ACE inhibitor therapy improves GSD I nephropathy

Gyongyi O Okechuku et al. J Inherit Metab Dis. 2017 Sep.

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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