Results 41 to 50 of about 1,152 (159)

Quantitative detection of free 24S-hydroxycholesterol, and 27-hydroxycholesterol from human serum. [PDF]

BMC Neurosci, 2014
Cholesterol metabolism is important for the maintenance of myelin and neuronal membranes in the central nervous system. Blood concentrations of the brain specific cholesterol metabolite 24S-hydroxysterol to the peripheral metabolite 27-hydroxycholesterol may be useful surrogate markers for neurodegenerative diseases including Alzheimer's disease ...
Bandaru VV, Haughey NJ.
europepmc   +4 more sources

Reduction in Levels of 24S-Hydroxycholesterol by Statin Treatment in Patients With Alzheimer Disease [PDF]

Archives of Neurology, 2003
The statin treatment of dyslipidemia is associated with a reduced risk of development of Alzheimer disease (AD). The effect may be mediated by a reduction in cholesterol biosynthesis in the brain, by lowering levels of apolipoprotein E (apo E)-containing lipoproteins, or by pleitropic effects such as reduction in beta-amyloid production.
Gloria Lena, Vega, Myron F, Weiner, Anne M, Lipton, Klaus, Von Bergmann, Dieter, Lutjohann, Carol, Moore, Doris, Svetlik   +6 more
openaire   +2 more sources

Key regulatory oxysterols in liver: analysis as Δ4-3-ketone derivatives by HPLC and response to physiological perturbations

Journal of Lipid Research, 2001
A number of oxysterols have been implicated in metabolic regulation. Key among these are (24S),25-epoxycholesterol and (24S)-hydroxycholesterol, high affinity ligands for the nuclear transcription factor liver X receptor α; 27-hydroxycholesterol, a bile ...
Zhe Zhang, Dansu Li, Daniel E. Blanchard, Steven R. Lear, Sandra K. Erickson, Thomas A. Spencer   +5 more
doaj   +1 more source

Highly sensitive quantification of key regulatory oxysterols in biological samples by LC-ESI-MS/MSs⃞

Journal of Lipid Research, 2009
We describe a highly sensitive and specific method for the quantification of key regulatory oxysterols in biological samples. This method is based upon a stable isotope dilution technique by liquid chromatography-tandem mass spectrometry (LC-MS/MS ...
Akira Honda, Kouwa Yamashita, Takashi Hara, Tadashi Ikegami, Teruo Miyazaki, Mutsumi Shirai, Guorong Xu, Mitsuteru Numazawa, Yasushi Matsuzaki   +8 more
doaj   +1 more source

Plasma 24S-hydroxycholesterol and other oxysterols in acute closed head injury [PDF]

Brain Injury, 2008
To determine if plasma levels of 24S-hydroxycholesterol, the primary catabolite of brain cholesterol, provide a measure of axonal damage in acute brain trauma.Determination of plasma 24S-hydroxycholesterol in a series of persons admitted to an intensive care unit for treatment of closed head injury.Levels of 24-S-hydroxycholesterol, 27 ...
Myron F, Weiner, Gloria L, Vega, Ramon, Diaz-Arrastia, Carol, Moore, Christopher, Madden, Anne, Hudak, Dieter, Lütjohann   +6 more
openaire   +2 more sources

Determination of 24S- and 27-hydroxycholesterol in plasma by high-performance liquid chromatography-mass spectrometry

Journal of Lipid Research, 2004
24S-Hydroxycholesterol (24S-OH-Chol) and 27-hydroxycholesterol (27-OH-Chol) are oxidized derivatives of cholesterol and of potential diagnostic interest because their circulating levels may reflect the cholesterol metabolism of the brain and macrophages,
Ines Burkard, Katharina M. Rentsch, Arnold von Eckardstein   +2 more
doaj   +1 more source

Esterification of 24S-OHC induces formation of atypical lipid droplet-like structures, leading to neuronal cell death[S]

Journal of Lipid Research, 2016
The 24(S)-hydroxycholesterol (24S-OHC), which plays an important role in maintaining brain cholesterol homeostasis, has been shown to possess neurotoxicity. We have previously reported that 24S-OHC esterification by ACAT1 and the resulting lipid droplet (
Wakako Takabe, Yasuomi Urano, Diep-Khanh Ho Vo, Kimiyuki Shibuya, Masaki Tanno, Hiroaki Kitagishi, Toyoshi Fujimoto, Noriko Noguchi   +7 more
doaj   +1 more source

PAK1 activation drives divergent resistance mechanisms to aromatase inhibition and tamoxifen in a luminal: A breast cancer model

Molecular Oncology, EarlyView.
Breast cancer remains a major cause of cancer death in women, frequently developing endocrine therapy resistance. This study demonstrates that upregulated p21‐activated kinase 1 (PAK1) activity drives resistance to tamoxifen and long‐term estrogen deprivation in ER+ breast cancer models.
Luisa Schwarzmüller, Janina Müller, Efstathios‐Iason Vlachavas, Lukas Beumers, Lena Fleischhacker, Sara Burmester, Angelika Wörner, Sabine Karolus, Dominic Helm, Cindy Körner, Stefan Wiemann   +10 more
wiley   +1 more source

Are side-chain oxidized oxysterols regulators also in vivo?

Journal of Lipid Research, 2009
Oxsterols are oxygenated metabolites of cholesterol that are short-lived intermediates or end products in cholesterol excretion pathways. They are present in very low concentrations in mammalian systems, always accompanied by a high excess of cholesterol.
Ingemar Bjo¨rkhem
doaj   +1 more source

Characterization of three naturally occurring lignans, sesamol, sesamolin, and sesamin, as potent inhibitors of human cytochrome P450 46A1: Implications for treating excitatory neurotoxicity

Frontiers in Pharmacology, 2022
CYP46A1 is a brain-specific enzyme responsible for cholesterol homeostasis. Inhibition of CYP46A1 activity serves as a therapeutic target for excitatory neurotoxicity.
Jie Du, Jie Du, Xiaodong Chen, Xiaodong Chen, Yongshun Zhao, Tingting Zhao, Tingting Zhao, Dalong Wang, Dalong Wang, Zujia Chen, Zujia Chen, Changyuan Wang, Changyuan Wang, Qiang Meng, Qiang Meng, Jialin Yao, Jialin Yao, Huijun Sun, Huijun Sun, Kexin Liu, Kexin Liu, Jingjing Wu, Jingjing Wu   +22 more
doaj   +1 more source