Receptor-Mediated Endocytosis of α-Galactosidase A in Human Podocytes in Fabry Disease
نویسندگان
چکیده
Injury to the glomerular podocyte is a key mechanism in human glomerular disease and podocyte repair is an important therapeutic target. In Fabry disease, podocyte injury is caused by the intracellular accumulation of globotriaosylceramide. This study identifies in the human podocyte three endocytic receptors, mannose 6-phosphate/insulin-like growth II receptor, megalin, and sortilin and demonstrates their drug delivery capabilities for enzyme replacement therapy. Sortilin, a novel α-galactosidase A binding protein, reveals a predominant intracellular expression but also surface expression in the podocyte. The present study provides the rationale for the renal effect of treatment with α-galactosidase A and identifies potential pathways for future non-carbohydrate based drug delivery to the kidney podocyte and other potential affected organs.
منابع مشابه
Fabry dissase from the dentist view
Fabry disease is a rare, inherited disease with lack of the enzyme alpha-galactosidase A (α-Gal) in the cells of the body that participates in the breakdown of fat. The disease begins in early childhood, progresses slowly throughout life and results in severe damage of the kidneys, heart and central nervous system. The disease is life-threatening and if left untreated, death ...
متن کاملMannose 6-Phosphate Receptor and Sortilin Mediated Endocytosis of α-Galactosidase A in Kidney Endothelial Cells
Prominent vasculopathy in Fabry disease patients is caused by excessive intracellular accumulation of globotriaosylceramide (GL-3) throughout the vascular endothelial cells causing progressive cerebrovascular, cardiac and renal impairments. The vascular lesions lead to myocardial ischemia, atherogenesis, stroke, aneurysm, thrombosis, and nephropathy. Hence, injury to the endothelial cells in th...
متن کاملRenal involvement in Fabry disease.
Every cell in the human body has globotriaosylceramide accumulation (Gb3) in Fabry disease due to the mutation in gene of the enzyme α-galactosidase A. It is a disease linked to sex. The main clinical features are: cutaneous angiokeratomas; acroparestesias and early strokes; decreased sweating and heat intolerance; ocular changes; myocardial hypertrophy, arrhythmias; gastrointestinal disorders ...
متن کاملHuman Alpha Galactosidases Transiently Produced in Nicotiana benthamiana Leaves: New Insights in Substrate Specificities with Relevance for Fabry Disease
Deficiency of α-galactosidase A (α-GAL) causes Fabry disease (FD), an X-linked storage disease of the glycosphingolipid globtriaosylcerammide (Gb3) in lysosomes of various cells and elevated plasma globotriaosylsphingosine (Lyso-Gb3) toxic for podocytes and nociceptive neurons. Enzyme replacement therapy is used to treat the disease, but clinical efficacy is limited in many male FD patients due...
متن کاملReduction of podocyte globotriaosylceramide content in adult male patients with Fabry disease with amenable GLA mutations following 6 months of migalastat treatment
OBJECTIVE Deficiency of α-galactosidase A (αGal-A) in Fabry disease leads to the accumulation mainly of globotriaosylceramide (GL3) in multiple renal cell types. Glomerular podocytes are relatively resistant to clearance of GL3 inclusions by enzyme replacement therapy (ERT). Migalastat, an orally bioavailable small molecule capable of chaperoning misfolded αGal-A to lysosomes, is approved in th...
متن کامل