TY  - JOUR
AB  - INTRODUCTION: Phosphoglucomutase 1 deficiency (PGM1 deficiency) has been identified as both, glycogenosis and congenital disorder of glycosylation (CDG). The phenotype includes hepatopathy, myopathy, oropharyngeal malformations, heart disease and growth retardation. Oral galactose supplementation at a dosage of 1 g per kg body weight per day is regarded as the therapy of choice. RESULTS: We report on a patient with a novel disease causing mutation, who was treated for 1.5 years with oral galactose supplementation. Initially, elevated transaminases were reduced and protein glycosylation of serum transferrin improved rapidly. Long-term surveillance however indicated limitations of galactose supplementation at the standard dose: 1 g per kg body weight per day did not achieve permanent correction of protein glycosylation. Even increased doses of up to 2.5 g per kg body weight did not result in complete normalization. Furthermore, we described for the first time heart rhythm abnormalities, i.e. long QT Syndrome associated with a glycosylation disorder. Mass spectrometry of IGFBP3, which was assumed to play a major role in growth retardation associated with PGM1 deficiency, revealed no glycosylation abnormalities. Growth rate did not improve under galactose supplementation. CONCLUSIONS: The results of our study indicate that the current standard dose of galactose might be too low to achieve normal glycosylation in all patients. In addition, growth retardation in PGM1 deficiency is complex and multifactorial. Furthermore, heart rhythm abnormalities must be considered when treating patients with PGM1 deficiency.
AU  - Nolting, Kristine
AU  - Park, Julien Heinrich
AU  - Park, Julien H.
AU  - Tegtmeyer, Laura Christina
AU  - Tegtmeyer, Laura
AU  - Zühlsdorf, Andrea
AU  - Grüneberg, Marianne
AU  - Rust, Stephan
AU  - Reunert, Janine
AU  - Du Chesne, Ingrid
AU  - Debus, Volker
AU  - Schulze-Bahr, Eric
AU  - Bahr, Eric Schulze-
AU  - Baxter, Robert C.
AU  - Wada, Yoshinao
AU  - Thiel, Christian
AU  - van Schaftingen, Emile
AU  - Fingerhut, Ralph
AU  - Marquardt, Thorsten
DA  - 2017-07-31
DO  - 10.1016/j.ymgmr.2017.07.010
KW  - Glycogenosis
KW  - Congenital disorder of glycosylation (CDG)
KW  - Phosphoglucomutase 1 (PGM1)
KW  - Galactose
KW  - Growth retardation
KW  - Glycoprotein profile
LA  - eng
N1  - Molecular Genetics and Metabolism Reports 13 (2017), 33-40
N1  - Finanziert durch den Open-Access-Publikationsfonds 2017 der Westfälischen Wilhelms-Universität Münster (WWU Münster).
PY  - 2017-07-31
TI  - Limitations of galactose therapy in phosphoglucomutase 1 deficiency
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:6-06139584889
Y2  - 2024-11-22T05:08:00
ER  -