The molecular basis of gastrointestinal intolerances in a severe case of Niemann-Pick type C disease was analyzed in an intestinal biopsy specimen. The enzyme activities of intestinal sucrase-isomaltase and maltase-glucoamylase are reduced in the patient, while that of lactase is comparable to the control. The association of SI with lipid rafts is reduced in the patient’s biopsy as a consequence of altered composition of membrane microdomains. As association with lipid rafts influences the intracellular transport and the enzyme activities of sucrase-isomaltase and maltase-glucoamylase, these data explain reduced carbohydrate digestion in the intestinal lumen and delineate the effect of deficient cholesterol and sphingolipid homeostasis in development of gastrointestinal symptoms in NPC patients.
CITATION STYLE
Amiri, M., Kuech, E. M., Shammas, H., Wetzel, G., & Naim, H. Y. (2016). The pathobiochemistry of gastrointestinal symptoms in a patient with Niemann-Pick type C disease. In JIMD Reports (Vol. 25, pp. 25–29). Springer. https://doi.org/10.1007/8904_2015_454
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