Lysosomal acid lipase (LAL) deficiency (LAL-D) is a lysosomal lipid storage disorder in which the accumulation of cholesteryl esters and triglycerides predominantly in hepatocytes and cells of the macrophage-monocyte system is observed. The disturbance in the synthesis and trafficking of cholesterol
A girl presented with small stature, obesity, tapetoretinal degeneration, deafness, psychomotor regression, seizures, acanthosis nigricans, hepatomegaly, and chronic tubulointerstitial nephropathy. She died at age ten with renal insufficiency and uncontrolled seizures. Histochemistry showed lipid
ATP-binding cassette transporter A1 (ABCA1) mediates the rate-limiting step in high density lipoprotein (HDL) particle formation, and its expression is regulated primarily by oxysterol-dependent activation of liver X receptors. We previously reported that ABCA1 expression and HDL formation are
We report the biological characterization of an animal model of a genetic lipid storage disease analogous to human Wolman's disease. Affected rats accumulated cholesteryl esters (13.3-fold), free cholesterol (2.8-fold), and triglycerides (5.4-fold) in the liver, as well as cholesteryl esters
In the first part of the review are reported the properties of mammalian acid lipases and cholesterol esterases. Lysosomal acid lipase differs from the other acid or neutral lipases by its subcellular localization and a large substrate specificity on natural lipids, triglycerides and cholesteryl
High-density lipoprotein (HDL)-[3H]triolein (i.e. [3H]triolein incorporated into reconstituted HDL) was taken up by cultured fibroblasts through an apparently saturable process, competitively inhibited by non-labelled HDL and independent of the LDL receptor. Using 125I-HDL and HDL-[3H]triolein,
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