Alternative titles and symbols : Mtp deficiency; Bassen-kornzweig syndrome; Microsomal triglyceride transfer protein deficiency; ACANTHOCYTOSIS;
Description : Abetalipoproteinemia and familial hypobetalipoproteinemia (FBHL; 615558) are rare
diseases characterized by hypocholesterolemia and malabsorption of lipid-soluble vitamins
leading to retinal degeneration, neuropathy, and coagulopathy. Hepatic steatosis is
also common. The root cause of both disorders is improper packaging and secretion
of apolipoprotein B-containing particles. Obligate heterozygous parents of ABL patients
usually have normal lipids consistent with autosomal recessive inheritance, whereas
obligate heterozygous parents of FBHL patients typically have half normal levels of
apoB-containing lipoproteins consistent with autosomal codominant inheritance (summary
by Lee and Hegele, 2013).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the microsomal triglyceride transfer protein gene (MTP, 157147.0001);