Can I use methanol or acetone for fixation of cells stained with BODIPY FL LDL?
If the BODIPY FL LDL is applied to live cells first and then fixed, the use of methanol or acetone fixation is not recommended. Exposure to alcohols, acetone, and other organic solvents can dissociate the BODIPY FL dye from the LDL.
LXR regulates cholesterol uptake through Idol-dependent ubiquitination of the LDL receptor.
Authors:Zelcer N, Hong C, Boyadjian R, Tontonoz P,
Journal:Science
PubMed ID:19520913
'Cellular cholesterol levels reflect a balance between uptake, efflux, and endogenous synthesis. Here we show that the sterol-responsive nuclear liver X receptor (LXR) helps maintain cholesterol homeostasis, not only through promotion of cholesterol efflux but also through suppression of low-density lipoprotein (LDL) uptake. LXR inhibits the LDL receptor (LDLR) pathway ... More
Specific binding of human low-density lipoprotein to the surface of schistosomula of Schistosoma mansoni and ingestion by the parasite.
Authors:Bennett MW, Caulfield JP
Journal:Am J Pathol
PubMed ID:2024706
'Low-density lipoproteins (LDL) may be important in human schistosomiasis because LDL bound to the surface of the parasite inhibits the binding of anti-schistosomal antibodies. Low-density lipoproteins also may serve as a source of lipids for the parasite membrane synthesis. Here LDL fluorescently labeled with carbocyanine dye (DiI-LDL) was used to ... More
An actin cytoskeleton with evolutionarily conserved functions in the absence of canonical actin-binding proteins.
Giardia intestinalis, a human intestinal parasite and member of what is perhaps the earliest-diverging eukaryotic lineage, contains the most divergent eukaryotic actin identified to date and is the first eukaryote known to lack all canonical actin-binding proteins (ABPs). We sought to investigate the properties and functions of the actin cytoskeleton ... More
Beta2 integrins modulate the initiation and progression of atherosclerosis in low-density lipoprotein receptor knockout mice.
Authors:Merched A, Tollefson K, Chan L,
Journal:Cardiovasc Res
PubMed ID:19843511
Beta2 integrin-mediated adhesion is thought to be a key event in cardiovascular disease. However, results of clinical trials targeting these molecules have been disappointing. Here, we investigated the effect of inactivation of beta2 integrins at different stages of atherosclerosis by timed bone marrow transplantation (BMT) of CD18(-/-) cells in low-density ... More
Cholesterol synthesis and import contribute to protective cholesterol increments in acute myeloid leukemia cells.
Authors:Banker DE, Mayer SJ, Li HY, Willman CL, Appelbaum FR, Zager RA,
Journal:Blood
PubMed ID:15161671
Cholesterol levels are abnormally increased in many acute myeloid leukemia (AML) samples exposed in vitro to chemotherapy. Blocking these acute cholesterol responses selectively sensitizes AML cells to therapeutics. Thus, defining the molecular mechanisms by which AML cells accomplish these protective cholesterol increments might elucidate novel therapeutic targets. We now report ... More