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Irundika H K Dias et al.
Redox biology, 16, 139-145 (2018-03-04)
Oxysterols (OHC) are biologically active cholesterol metabolites circulating in plasma that may be formed enzymatically (e.g. 24S-OHC, 25-OHC and 27-OHC) or by autoxidative mechanisms (e.g. 7-ketocholesterol, 7β-OHC and 25-OHC). Oxysterols are more soluble than cholesterol and are reported to exert...
Lu Liu et al.
Oncology letters, 18(4), 3623-3629 (2019-10-04)
Glioblastoma is the most frequent primary malignant brain tumor in adults. Oxysterols are oxidation products of cholesterol generated by enzymatic reactions. 27-hydroxycholesterol (27-HC), an oxysterol, is an abundant metabolite of cholesterol. 27-HC significantly accelerates mammary cancer growth, proliferation and progression...
Shaneabbas Raza et al.
Cancer cell international, 17, 52-52 (2017-05-16)
For every six men, one will be diagnosed with prostate cancer (PCa) in their lifetime. Estrogen receptors (ERs) are known to play a role in prostate carcinogenesis. However, it is unclear whether the estrogenic effects are mediated by estrogen receptor...
Alzbeta Kloudova-Spalenkova et al.
The Journal of steroid biochemistry and molecular biology, 197, 105566-105566 (2019-12-25)
Oxygenated metabolites of cholesterol (oxysterols) have been previously demonstrated to contribute to progression of various cancers and to modulate resistance to breast cancer endocrine therapy in vitro. We measured prognostic roles of circulating levels of seven major oxysterols in the...
Andrea Civra et al.
The Journal of steroid biochemistry and molecular biology, 193, 105424-105424 (2019-07-16)
Oxysterols are cholesterol oxidation derivatives. Those containing an additional hydroxyl group on the side chain of the cholesterol molecule result from a physiological enzymatic synthesis and include the majority of oxysterols present in the circulation. Among these, 25-hydroxycholesterol (25OHC) and...
Julien Musman et al.
Biochemical pharmacology, 142, 87-95 (2017-06-25)
A major cause of cell death during myocardial ischemia-reperfusion is mitochondrial dysfunction. We previously showed that the reperfusion of an ischemic myocardium was associated with an accumulation of cholesterol into mitochondria and a concomitant strong generation of auto-oxidized oxysterols. The...
Michihisa Umetani et al.
Cell metabolism, 20(1), 172-182 (2014-06-24)
Oxysterols are cholesterol metabolites that serve multiple functions in lipid metabolism, including as liver X receptor (LXR) ligands. 27-hydroxycholesterol (27HC) is an abundant oxysterol metabolized by CYP7B1. How 27HC impacts vascular health is unknown. We show that elevations in 27HC...
Erik R Nelson et al.
Science (New York, N.Y.), 342(6162), 1094-1098 (2013-11-30)
Hypercholesterolemia is a risk factor for estrogen receptor (ER)-positive breast cancers and is associated with a decreased response of tumors to endocrine therapies. Here, we show that 27-hydroxycholesterol (27HC), a primary metabolite of cholesterol and an ER and liver X...
Louise Ménégaut et al.
Cell reports, 31(7), 107665-107665 (2020-05-21)
Low-grade inflammation is constitutive of atherosclerosis, and anti-inflammatory therapy inhibiting interleukin-1β (IL-1β) reduces the rate of cardiovascular events. While cholesterol accumulation in atheroma plaque and macrophages is a major driver of the inflammatory process, the role of the LXR cholesterol...
Di Li et al.
Obesity (Silver Spring, Md.), 26(4), 713-722 (2018-02-25)
Although 27-hydroxycholesterol (27-HC) has been reported as a potent regulator of lipid homeostasis, its role in hepatic lipogenesis remains obscure. The present study was designed to investigate the impact of 27-HC on sterol regulatory element-binding protein 1 (SREBP-1) and hepatic...
Samantha A Hutchinson et al.
Nutrients, 11(11) (2019-11-07)
Interventions that alter cholesterol have differential impacts on hormone receptor positive- and negative-breast cancer risk and prognosis. This implies differential regulation or response to cholesterol within different breast cancer subtypes. We evaluated differences in side-chain hydroxycholesterol and liver X nuclear...