Infectious and digestive complications in glycogen storage disease type Ib: Study of a French cohort

Camille Wicker, Célina Roda, Ariane Perry, Jean Baptiste Arnoux, Anais Brassier, Martin Castelle, Aude Servais, Jean Donadieu, Juliette Bouchereau, Bénédicte Pigneur, Philippe Labrune, Frank M Ruemmele, Pascale de Lonlay
Molecular Genetics and Metabolism Reports 2020, 23: 100581
Glycogenosis type Ib (GSD1B) causes not only hypoglycemia but also infections and "Crohn's disease like" inflammatory bowel disease (IBD) that can significantly impair patient's quality of life. We retrospectively evaluated infectious and digestive complications in 9 French patients (3 girls, 6 boys) diagnosed at 0.8 years on average, with a mean follow-up of 19.1 years. Infections occurred earlier than IBD, at mean ages of 1.7 and 3.8 years, respectively. The number of acute hospitalizations was 0.7/year due to infectious (0.4/year) or digestive symptoms (0.4/year). Clinical presentations allowed separating patients into mild ( n  = 5) and severe ( n  = 4) intestinal involvement. Patients in the severe group had more serious digestive symptoms but also earlier neutropenia (median 0.3 vs. 1.5 years, p  =0 .046) with a tendency to a lower neutrophil count (NC) during follow-up, and a higher number of acute hospitalizations (median 1.3/year vs. 0.2/year, p  =0 .014) due to digestive symptoms (median 0.6/year vs. 0.05/year, p  = 0,012) and infections (median 0.8/year vs. 0.2/year, p =0 .014). Treatments included G-CSF and cotrimoxazole ( n  = 7), 5-aminosalicylic acid ( n  = 2), and a polymeric solution enriched in the anti-inflammatory cytokine TGF-β ( n  = 4, "severe" group), and immunomodulatory treatment ( n  = 1). In conclusion, infections and IBD are rare but severe complications in GSD1B. Neutropenia tended to be more prevalent in the severe IBD group than in the mild IBD group. Dietetic treatment with specific anti-inflammatory solutions seems particularly appropriate in these patients.

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