Results 31 to 40 of about 4,101,858 (162)

Changes in the levels of cerebral and extracerebral sterols in the brain of patients with Alzheimer's disease

Journal of Lipid Research, 2004
24S-hydroxycholesterol is a side-chain oxidized oxysterol formed in the brain that is continuously crossing the blood-brain barrier to reach the circulation. There may be an opposite flux of 27-hydroxycholesterol, which is formed to a lower extent in the
Maura Heverin, Nenad Bogdanovic, Dieter Lütjohann, Thomas Bayer, Irina Pikuleva, Lionel Bretillon, Ulf Diczfalusy, Bengt Winblad, Ingemar Björkhem   +8 more
doaj   +1 more source

Oxidation of 7-dehydrocholesterol and desmosterol by human cytochrome P450 46A1[S]

Journal of Lipid Research, 2014
Cytochrome P450 (P450 or CYP) 46A1 is expressed in brain and has been characterized by its ability to oxidize cholesterol to 24S-hydroxycholesterol. In addition, the same enzyme is known to further oxidize 24S-hydroxycholesterol to the 24,25- and 24,27 ...
Sandeep Goyal, Yi Xiao, Ned A. Porter, Libin Xu, F. Peter Guengerich   +4 more
doaj   +1 more source

On the rate of translocation in vitro and kinetics in vivo of the major oxysterols in human circulation

Journal of Lipid Research, 2002
Oxysterols possess powerful biological activities. Some of their effects on the regulation of key enzymes are similar to those of cholesterol, but are much more potent.
Steve Meaney, Karl Bodin, Ulf Diczfalusy, Ingemar Björkhem   +3 more
doaj   +1 more source

A pilot study of the association between maternal mid-pregnancy cholesterol and oxysterol concentrations and labor duration

Lipids in Health and Disease, 2023
Background Previous animal model studies have highlighted a role for cholesterol and its oxidized derivatives (oxysterols) in uterine contractile activity, however, a lipotoxic state associated with hypercholesterolemia may contribute to labor dystocia ...
Todd C. Rideout, Jaclyn Wallace, Xiaozhong Wen, Vanessa M. Barnabei, Kai Ling Kong, Richard W. Browne   +5 more
doaj   +1 more source

The Cross-Talk Between the Peripheral and Brain Cholesterol Metabolisms

Current Issues in Molecular Biology
Cholesterol is an essential element for the development and normal function of the central nervous system. While peripheral cholesterol is influenced by liver metabolism and diet, brain cholesterol metabolism takes place in an isolated system due to the ...
Ilinca Savulescu-Fiedler, Luiza-Roxana Dorobantu-Lungu, Serban Dragosloveanu, Serban Nicolae Benea, Christiana Diana Maria Dragosloveanu, Ana Caruntu, Andreea-Elena Scheau, Constantin Caruntu, Cristian Scheau   +8 more
doaj   +1 more source

Separation and Determination of Some of the Main Cholesterol-Related Compounds in Blood by Gas Chromatography-Mass Spectrometry (Selected Ion Monitoring Mode)

Separations, 2018
Oxysterols are metabolites produced in the first step of cholesterol metabolism, which is related to neurodegenerative disorder. They can be detected by testing blood, plasma, serum, or cerebrospinal fluid.
Lucia Valverde-Som, Alegría Carrasco-Pancorbo, Saleta Sierra, Soraya Santana, Cristina Ruiz-Samblás, Natalia Navas, Javier S. Burgos, Luis Cuadros-Rodríguez   +7 more
doaj   +1 more source

2-Hydroxypropyl-β-cyclodextrin mitigates pathological changes in a mouse model of retinal cholesterol dyshomeostasis

Journal of Lipid Research, 2023
CYP46A1 is a CNS-specific enzyme, which eliminates cholesterol from the brain and retina by metabolism to 24-hydroxycholesterol, thus contributing to cholesterol homeostasis in both organs.
Nicole El-Darzi, Natalia Mast, Sandra S. Hammer, Tim F. Dorweiler, Julia V. Busik, Irina A. Pikuleva   +5 more
doaj   +1 more source

Highly automated nano-LC/MS-based approach for thousand cell-scale quantification of side chain-hydroxylated oxysterols[S]

Journal of Lipid Research, 2014
Iso-octyl chain-hydroxylated oxysterols were determined in attomoles per 10,000 cells concentrations in 10,000–80,000 cultured pancreatic adenocarcinoma cells, using a sensitive, highly automated nano-LC-ESI-MS-based method.
Hanne Roberg-Larsen, Kaja Lund, Tore Vehus, Nina Solberg, Caroline Vesterdal, Dorna Misaghian, Petter Angell Olsen, Stefan Krauss, Steven Ray Wilson, Elsa Lundanes   +9 more
doaj   +1 more source

A quantitative LC-MS/MS method for analysis of mitochondrial -specific oxysterol metabolism

Redox Biology, 2020
Oxysterols are critical regulators of inflammation and cholesterol metabolism in cells. They are oxidation products of cholesterol and may be differentially metabolised in subcellular compartments and in biological fluids.
Khushboo Borah, Olivia J. Rickman, Nikol Voutsina, Isaac Ampong, Dan Gao, Emma L. Baple, Irundika HK. Dias, Andrew H. Crosby, Helen R. Griffiths   +8 more
doaj   +1 more source

Plasma oxysterols: Altered level of plasma 24-hydroxycholesterol in patients with bipolar disorder

, 2021
International audienceCholesterol and its oxygenated metabolites, including oxysterols, are intensively investigated as potential players in the pathophysiology of brain disorders.
Bonnefont-Rousselot, Dominique, Lamari, Foudil, Naifar, Manel, Maalej, Mohamed, Guidara, Wassim, Messedi, Meriam, Ayadi, Fatma, Maalej, Manel, Grayaa, Sahar, Khrouf, Walid   +9 more
core   +1 more source