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Elaine M Quinet et al.
Journal of lipid research, 45(10), 1929-1942 (2004-08-05)
Liver X receptors (LXRs) play key roles in the regulation of cholesterol homeostasis by limiting cholesterol accumulation in macrophages within arterial wall lesion sites by a mechanism that includes the upregulation of ATP binding cassette transporters. These atheroprotective properties distinguish
Monica de Gaetano et al.
Journal of inflammation (London, England), 12, 15-15 (2015-02-28)
Atherosclerosis, the underlying cause of heart attack and strokes, is a progresive dyslipidemic and inflammatory disease where monocyte-derived macrophage cells play a pivotal role. Although most of the mechanisms that contribute to the progression of atherosclerosis have been identified, there
Yongjun Yu et al.
PLoS pathogens, 9(4), e1003266-e1003266 (2013-04-18)
PKR-like endoplasmic reticulum (ER) kinase (PERK) is an ER-associated stress sensor protein which phosphorylates eukaryotic initiation factor 2α (eIF2α) to induce translation attenuation in response to ER stress. PERK is also a regulator of lipogenesis during adipocyte differentiation through activation
Tian Du et al.
Breast cancer research : BCR, 20(1), 106-106 (2018-09-06)
Invasive lobular breast carcinoma (ILC) is a histological subtype of breast cancer that is characterized by loss of E-cadherin and high expression of estrogen receptor alpha (ERα). In many cases, ILC is effectively treated with adjuvant aromatase inhibitors (AIs); however
Gera Goverse et al.
Journal of immunology (Baltimore, Md. : 1950), 198(5), 2172-2181 (2017-01-20)
The gastrointestinal tract is continuously exposed to many environmental factors that influence intestinal epithelial cells and the underlying mucosal immune system. In this article, we demonstrate that dietary fiber and short chain fatty acids (SCFAs) induced the expression of the
Fernanda S Ferreira et al.
Journal of food science, 82(12), 2823-2831 (2017-11-11)
The high temperatures used to fry fish may induce thermo-oxidation of cholesterol, forming cholesterol oxidation products (COPs). COPs have been associated to coronary heart diseases, atherosclerosis, and other chronic diseases. Air fryers are an alternative thermal process technology to fry
Hang Fu et al.
Atherosclerosis, 237(2), 443-452 (2014-12-03)
Inflammation is essential for atherogenesis. Cholesterol, a cardiovascular risk factor, may activate inflammation in the vessel wall during this process. Cytokine-mediated interactions of human monocytes with vascular smooth muscle cells (SMCs) may perpetuate this process. We investigated the capacity of
Patrizia Romani et al.
Nature cell biology, 21(3), 338-347 (2019-02-06)
Extracellular matrix (ECM) mechanical cues have powerful effects on cell proliferation, differentiation and death. Here, starting from an unbiased metabolomics approach, we identify synthesis of neutral lipids as a general response to mechanical signals delivered by cell-matrix adhesions. Extracellular physical
Ciara M Gallagher et al.
eLife, 5 (2016-07-21)
The membrane-bound transcription factor ATF6α plays a cytoprotective role in the unfolded protein response (UPR), required for cells to survive ER stress. Activation of ATF6α promotes cell survival in cancer models. We used cell-based screens to discover and develop Ceapins
Akira Koarai et al.
Respiratory research, 13, 63-63 (2012-08-02)
25-hydroxycholesterol (25-HC) is one of the oxysterols, which are oxidized derivatives of cholesterol, and has been reported to be involved in the pathogenesis of atherosclerosis and Alzheimer's disease. In lung, the possible involvement of 25-HC in airway diseases has been
Hisatoshi Sugiura et al.
Respirology (Carlton, Vic.), 17(3), 533-540 (2012-02-03)
25-Hydroxycholesterol (25-HC) is produced from cholesterol by the enzyme cholesterol 25-hydroxylase and is associated with atherosclerosis of vessels. Recently, 25-HC was reported to cause inflammation in various types of tissues. The aim of this study was to assess the production
Adriana Carino et al.
Pharmacological research, 131, 17-31 (2018-03-14)
Liver fibrosis, a major health concern worldwide, results from abnormal collagen deposition by activated hepatic stellate cells (HSCs) in an injured liver. The farnesoid-x-receptor (FXR) is a bile acid sensor that counteracts HSCs transdifferentiation. While targeting FXR holds promise, 6-ethyl-CDCA
Andrea Reboldi et al.
Science (New York, N.Y.), 345(6197), 679-684 (2014-08-12)
Type I interferon (IFN) protects against viruses, yet it also has a poorly understood suppressive influence on inflammation. Here, we report that activated mouse macrophages lacking the IFN-stimulated gene cholesterol 25-hydroxylase (Ch25h) and that are unable to produce the oxysterol
Vicky Howe et al.
Biochimica et biophysica acta, 1862(7), 647-657 (2017-03-28)
The two control points of cholesterol synthesis, 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGCR) and squalene monooxygenase (SQLE) are known targets of the transcription factor sterol-regulatory element binding protein-2 (SREBP-2). Yet the location of the sterol-regulatory elements (SREs) and cofactor binding sites, nuclear
Ilana Kelsey et al.
Scientific reports, 7(1), 16112-16112 (2017-11-25)
The mechanistic target of rapamycin complex 1 (mTORC1) is a central regulator of cell growth that is often aberrantly activated in cancer. However, mTORC1 inhibitors, such as rapamycin, have limited effectiveness as single agent cancer therapies, with feedback mechanisms inherent
Tetsuya Kimura et al.
Nature communications, 7, 13130-13130 (2016-10-13)
Macrophages play crucial roles in host defence and tissue homoeostasis, processes in which both environmental stimuli and intracellularly generated metabolites influence activation of macrophages. Activated macrophages are classified into M1 and M2 macrophages. It remains unclear how intracellular nutrition sufficiency
Alexandra Doms et al.
Journal of virology, 92(18) (2018-06-29)
Following the initial detection of viral infection, innate immune responses trigger the induction of numerous interferon-stimulated genes (ISGs) to inhibit virus replication and dissemination. One such ISG encodes cholesterol-25-hydroxylase (CH25H), an enzyme that catalyzes the oxidation of cholesterol to form
Zewen K Tuong et al.
Endocrinology, 154(1), 140-149 (2012-12-15)
We and others have previously demonstrated that congenital deficiency of the nuclear hormone receptor, Rorα1, in staggerer (sg/sg) mice results in resistance to diet-induced obesity and increased insulin sensitivity. Paradoxically, the sg/sg mice are susceptible to atherosclerosis and display impaired
Zoltán Pataj et al.
Journal of chromatography. A, 1439, 82-88 (2015-11-27)
Oxysterols are important intermediates in numerous metabolic and catabolic pathways and their biological significance is also proven. The present paper describes a reliable and short liquid chromatography-high-resolution mass spectrometry method (LC-MS/HR-MS) for the quantification of 8 different oxysterols (24(S)-hydroxycholesterol, 25-hydroxycholesterol
Steve Catarino et al.
Acta ophthalmologica, 90(4), e255-e263 (2012-02-09)
This study aimed at elucidating the molecular mechanisms involved in the regulation of IL-8 production by several oxysterols in retinal pigment epithelium (RPE) cells. A human cell line from RPE (ARPE-19) was used to test the role of cholesterol and
Muhammad I Khan et al.
Lipids in health and disease, 14, 89-89 (2015-08-12)
Cholesterol is an important biological compound; however, its oxidation products have been proven to be harmful to human health. Cooking, storage, and reheating methods significantly affect the safety of meat products, as they contribute to the production of cholesterol oxidation
Panagiotis Papatheodorou et al.
FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 33(4), 4883-4892 (2018-12-29)
Clostridium difficile is associated with antibiotic-associated diarrhea and pseudomembranous colitis in humans. Its 2 major toxins, toxins A and B, enter host cells and inactivate GTPases of the Ras homologue/rat sarcoma family by glucosylation. Pore formation of the toxins in
Fadhil Ahsan et al.
Scientific reports, 8(1), 1520-1520 (2018-01-26)
Mycobacterium tuberculosis (Mtb) is a life-threatening pathogen in humans. Bacterial infection of macrophages usually triggers strong innate immune mechanisms, including IL-1 cytokine secretion. The newer member of the IL-1 family, IL-36, was recently shown to be involved in cellular defense
Lishan Zhang et al.
Biochemical and biophysical research communications, 485(4), 736-741 (2017-03-05)
25-hydroxycholesterol (25-HC) is implicated in many processes, including lipid metabolism and the immune response. However, the role of 25-HC in RANKL-induced osteoclastogenesis remains largely unknown. Our results showed that 25-HC inhibited miR-139-5p expression in mouse bone marrow macrophages (BMMs) cultured
Gérald Gaibelet et al.
PloS one, 10(4), e0121563-e0121563 (2015-04-16)
In the aim of testing tools for tracing cell trafficking of exogenous cholesterol, two fluorescent derivatives of cholesterol, 22-nitrobenzoxadiazole-cholesterol (NBD-Chol) and 21-methylpyrenyl-cholesterol (Pyr-met-Chol), with distinctive chemico-physical characteristics, have been compared for their cell incorporation properties, using two cell models differently
Lene H Petersen et al.
Environmental toxicology and chemistry, 34(2), 379-390 (2014-12-04)
As knowledge of contaminants capable of adversely modulating endocrine functions increases, attention is focused on the effects of synthetic progestins as environmental endocrine disrupters. In the present study, effects of exposure to a synthetic progestin (norethindrone, 168 ± 7.5 ng/L) and endogenous progestogen
Shaoxiong Yu et al.
The Journal of general virology, 100(2), 156-165 (2018-11-30)
Classical swine fever virus (CSFV), the etiological agent of classical swine fever in pigs, is a member of the Pestivirus genus within the Flaviviridae family. It has been proposed that CSFV infection is significantly inhibited by methyl-β-cyclodextrin (MβCD) treatment. However
Anthony W G Burgett et al.
Nature chemical biology, 7(9), 639-647 (2011-08-09)
Cephalostatin 1, OSW-1, ritterazine B and schweinfurthin A are natural products that potently, and in some cases selectively, inhibit the growth of cultured human cancer cell lines. The cellular targets of these small molecules have yet to be identified. We
T Vehus et al.
Scientific reports, 6, 37507-37507 (2016-11-30)
We have designed a versatile and sensitive liquid chromatographic (LC) system, featuring a monolithic trap column and a very narrow (10 μm ID) fused silica open tubular liquid chromatography (OTLC) separation column functionalized with C
Brett N Olsen et al.
Biophysical journal, 100(4), 948-956 (2011-02-16)
Side-chain oxysterols are enzymatically generated oxidation products of cholesterol that serve a central role in mediating cholesterol homeostasis. Recent work has shown that side-chain oxysterols, such as 25-hydroxycholesterol (25-HC), alter membrane structure in very different ways from cholesterol, suggesting a
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