101
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Liu H, Huang S. Role of oxysterol-binding protein-related proteins in malignant human tumours. World J Clin Cases 2020; 8:1-10. [PMID: 31970164 PMCID: PMC6962060 DOI: 10.12998/wjcc.v8.i1.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 12/11/2019] [Accepted: 12/13/2019] [Indexed: 02/05/2023] Open
Abstract
The oxysterol-binding protein-related protein (ORP) family is a group of proteins that mediate oxysterol metabolism and bioactivity in cells. ORPs constitute a large family of lipid transfer proteins. Much of the current evidence indicates that certain members of the family of oxysterol-binding proteins (OSBPs) can lead to cancer. Many studies have revealed the putative roles of OSBPs in various cancer types. However, the exact effects and mechanisms of action of members of the OSBP/ORP family in cancer initiation and progression are currently unclear. This review focuses on ORP family members that can accelerate human tumour cell proliferation, migration, and invasion. The mechanisms and functions of various ORPs are introduced in detail. We also attempt to identify the roles of these proteins in malignant tumours with the ultimate aim of determining the exact role of the OSBP/ORP family in human tumour cells.
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Affiliation(s)
- Hao Liu
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
| | - Shuai Huang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
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102
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Anderson A, Campo A, Fulton E, Corwin A, Jerome WG, O'Connor MS. 7-Ketocholesterol in disease and aging. Redox Biol 2020; 29:101380. [PMID: 31926618 PMCID: PMC6926354 DOI: 10.1016/j.redox.2019.101380] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/06/2019] [Accepted: 11/10/2019] [Indexed: 02/08/2023] Open
Abstract
7-Ketocholesterol (7KC) is a toxic oxysterol that is associated with many diseases and disabilities of aging, as well as several orphan diseases. 7KC is the most common product of a reaction between cholesterol and oxygen radicals and is the most concentrated oxysterol found in the blood and arterial plaques of coronary artery disease patients as well as various other disease tissues and cell types. Unlike cholesterol, 7KC consistently shows cytotoxicity to cells and its physiological function in humans or other complex organisms is unknown. Oxysterols, particularly 7KC, have also been shown to diffuse through membranes where they affect receptor and enzymatic function. Here, we will explore the known and proposed mechanisms of pathologies that are associated with 7KC, as well speculate about the future of 7KC as a diagnostic and therapeutic target in medicine.
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103
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Faletrov YV, Efimova VS, Horetski MS, Tugaeva KV, Frolova NS, Lin Q, Isaeva LV, Rubtsov MA, Sluchanko NN, Novikova LA, Shkumatov VM. New 20-hydroxycholesterol-like compounds with fluorescent NBD or alkyne labels: Synthesis, in silico interactions with proteins and uptake by yeast cells. Chem Phys Lipids 2019; 227:104850. [PMID: 31836520 DOI: 10.1016/j.chemphyslip.2019.104850] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 12/03/2019] [Accepted: 12/04/2019] [Indexed: 01/07/2023]
Abstract
20-hydroxycholesterol is a signaling oxysterol with immunomodulating functions and, thus, structural analogues with reporter capabilities could be useful for studying and modulating the cellular processes concerned. We have synthesized three new 20-hydroxycholesterol-like pregn-5-en-3β-ol derivatives with fluorescent 7-nitrobenzofurazan (NBD) or Raman-sensitive alkyne labels in their side-chains. In silico computations demonstrated the compounds possess good membrane permeability and can bind within active sites of known 20-hydroxycholesterol targets (e.g. Smoothened and yeast Osh4) and some other sterol-binding proteins (human LXRβ and STARD1; yeast START-kins Lam4S2 and Lam2S2). Having found good predicted membrane permeability and binding to some yeast proteins, we tested the compounds on microorganisms. Fluorescent microscopy indicated the uptake of the steroids by both Saccharomyces cerevisiae and Yarrowia lipolytica, whereas only S. cerevisiae demonstrated conversion of the compounds into 3-O-acetates, likely because 3-O-acetyltransferase Atf2p is present only in its genome. The new compounds provide new options to study the uptake, intracellular distribution and metabolism of sterols in yeast cells as well as might be used as ligands for sterol-binding proteins.
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Affiliation(s)
- Yaroslav V Faletrov
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus; Faculty of Chemistry, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus
| | - Vera S Efimova
- Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/40, 119234 Moscow, Russia; Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/12, 119234 Moscow, Russia
| | - Matvey S Horetski
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus; Faculty of Chemistry, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus
| | - Kristina V Tugaeva
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Pr. 33, Moscow, 119071, Russia; Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/12, 119234 Moscow, Russia
| | - Nina S Frolova
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus
| | - Quingquing Lin
- Faculty of Chemistry, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus
| | - Ludmila V Isaeva
- Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/40, 119234 Moscow, Russia
| | - Mikhail A Rubtsov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/12, 119234 Moscow, Russia; Sechenov First Moscow State Medical University (Sechenov University), Moscow, 119991, Russia; Lomonosov Moscow State University, Laboratoire Franco-Russe de Recherches en Oncologie, Moscow, 119234, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Pr. 33, Moscow, 119071, Russia; Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/12, 119234 Moscow, Russia
| | - Ludmila A Novikova
- Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/40, 119234 Moscow, Russia
| | - Vladimir M Shkumatov
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus; Faculty of Chemistry, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus.
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104
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Hong W, Guo F, Yang M, Xu D, Zhuang Z, Niu B, Bai Q, Li X. Hydroxysteroid sulfotransferase 2B1 affects gastric epithelial function and carcinogenesis induced by a carcinogenic agent. Lipids Health Dis 2019; 18:203. [PMID: 31757214 PMCID: PMC6874824 DOI: 10.1186/s12944-019-1149-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 11/07/2019] [Indexed: 12/20/2022] Open
Abstract
Background A healthy gastric mucosal epithelium exhibits tumor-suppressive properties. Gastric epithelial cell dysfunction contributes to gastric cancer development. Oxysterols provided from food or cholesterol oxidation in the gastric epithelium may be further sulfated by hydroxysteroid sulfotransferase 2B1 (SULT2B1), which is highly abundant in the gastric epithelium. However, the effects of SULT2B1 on gastric epithelial function and gastric carcinogenesis are unclear. Methods A mouse gastric tumor model was established using carcinogenic agent 3-methylcholanthrene (3-MCA). A SULT2B1 deletion (SULT2B1−/−) human gastric epithelial line GES-1 was constructed by CRISPR/CAS9 genome editing system. Results The gastric tumor incidence was higher in the SULT2B1−/− mice than in the wild-type (WT) mice. In gastric epithelial cells, adenovirus-mediated SULT2B1b overexpression reduced the levels of oxysterols, such as 24(R/S),25-epoxycholesterol (24(R/S),25-EC) and 27-hydroxycholesterol (27HC). This condition also increased PI3K/AKT signaling to promote gastric epithelial cell proliferation, epithelization, and epithelial development. However, SULT2B1 deletion or SULT2B1 knockdown suppressed PI3K/AKT signaling, epithelial cell epithelization, and wound healing and induced gastric epithelial cell malignant transition upon 3-MCA induction. Conclusions The abundant SULT2B1 expression in normal gastric epithelium might maintain epithelial function via the PI3K/AKT signaling pathway and suppress gastric carcinogenesis induced by a carcinogenic agent.
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Affiliation(s)
- Wenting Hong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Fenghua Guo
- Department of General Surgery, Hua'shan Hospital, Fudan University Shanghai Medical College, Shanghai, China
| | - Mingjie Yang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Dongke Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Ziyan Zhuang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Baolin Niu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Qianming Bai
- Department of Pathology, Fudan University Shanghai Cancer Centre, Shanghai, 200032, China. .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.
| | - Xiaobo Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China.
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105
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Sottero B, Rossin D, Staurenghi E, Gamba P, Poli G, Testa G. Omics analysis of oxysterols to better understand their pathophysiological role. Free Radic Biol Med 2019; 144:55-71. [PMID: 31141713 DOI: 10.1016/j.freeradbiomed.2019.05.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/30/2019] [Accepted: 05/24/2019] [Indexed: 12/12/2022]
Abstract
High amounts of cholesterol have been definitely associated with the pathogenesis of several diseases, including metabolic and neurodegenerative disorders, cardiovascular diseases, and cancer. In all these pathologies the exacerbation of pro-oxidant and inflammatory responses is a consistent feature. In this scenario, species derived from enzymatic and non-enzymatic cholesterol oxidation, namely oxysterols, are strongly suspected to play a primary role. The consideration of these bioactive lipids is therefore helpful in investigating pathological mechanisms and may also acquire clinical value for the diagnosis and treatment of diseases. For this purpose and considering that a great number of oxysterols may be present together in the body, the employment of lipidomics technology certainly represents a powerful strategy for the simultaneous detection and characterization of these compounds in biological specimens. In this review, we will discuss the applicability of the lipidomics approach in the study of the association between oxysterols and diseases.
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Affiliation(s)
- Barbara Sottero
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino, Italy.
| | - Daniela Rossin
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino, Italy
| | - Erica Staurenghi
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino, Italy
| | - Paola Gamba
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino, Italy
| | - Giuseppe Poli
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino, Italy
| | - Gabriella Testa
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino, Italy
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106
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Quantitative analysis of cholesterol oxidation products and desmosterol in parenteral liposomal pharmaceutical formulations. Int J Pharm 2019; 569:118576. [DOI: 10.1016/j.ijpharm.2019.118576] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 11/19/2022]
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107
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Phenotypic Plasticity of Fibroblasts during Mammary Carcinoma Development. Int J Mol Sci 2019; 20:ijms20184438. [PMID: 31505876 PMCID: PMC6769951 DOI: 10.3390/ijms20184438] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/04/2019] [Accepted: 09/06/2019] [Indexed: 02/08/2023] Open
Abstract
Cancer-associated fibroblasts (CAFs) in the tumor microenvironment contribute to all stages of tumorigenesis and are usually considered to be tumor-promoting cells. CAFs show a remarkable degree of heterogeneity, which is attributed to developmental origin or to local environmental niches, resulting in distinct CAF subsets within individual tumors. While CAF heterogeneity is frequently investigated in late-stage tumors, data on longitudinal CAF development in tumors are lacking. To this end, we used the transgenic polyoma middle T oncogene-induced mouse mammary carcinoma model and performed whole transcriptome analysis in FACS-sorted fibroblasts from early- and late-stage tumors. We observed a shift in fibroblast populations over time towards a subset previously shown to negatively correlate with patient survival, which was confirmed by multispectral immunofluorescence analysis. Moreover, we identified a transcriptomic signature distinguishing CAFs from early- and late-stage tumors. Importantly, the signature of early-stage CAFs correlated well with tumor stage and survival in human mammary carcinoma patients. A random forest analysis suggested predictive value of the complete set of differentially expressed genes between early- and late-stage CAFs on bulk tumor patient samples, supporting the clinical relevance of our findings. In conclusion, our data show transcriptome alterations in CAFs during tumorigenesis in the mammary gland, which suggest that CAFs are educated by the tumor over time to promote tumor development. Moreover, we show that murine CAF gene signatures can harbor predictive value for human cancer.
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108
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Revilla G, Pons MDP, Baila-Rueda L, García-León A, Santos D, Cenarro A, Magalhaes M, Blanco RM, Moral A, Ignacio Pérez J, Sabé G, González C, Fuste V, Lerma E, Faria MDS, de Leiva A, Corcoy R, Carles Escolà-Gil J, Mato E. Cholesterol and 27-hydroxycholesterol promote thyroid carcinoma aggressiveness. Sci Rep 2019; 9:10260. [PMID: 31311983 PMCID: PMC6635382 DOI: 10.1038/s41598-019-46727-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 07/04/2019] [Indexed: 01/16/2023] Open
Abstract
Cholesterol mediates its proliferative and metastatic effects via the metabolite 27-hydroxycholesterol (27-HC), at least in breast and endometrial cancer. We determined the serum lipoprotein profile, intratumoral cholesterol and 27-HC levels in a cohort of patients with well-differentiated papillary thyroid carcinoma (PTC; low/intermediate and high risk), advanced thyroid cancers (poorly differentiated, PDTC and anaplastic thyroid carcinoma, ATC) and benign thyroid tumors, as well as the expression of genes involved in cholesterol metabolism. We investigated the gene expression profile, cellular proliferation, and migration in Nthy-ori 3.1 and CAL-62 cell lines loaded with human low-density lipoprotein (LDL). Patients with more aggressive tumors (high-risk PTC and PDTC/ATC) showed a decrease in blood LDL cholesterol and apolipoprotein B. These changes were associated with an increase in the expression of the thyroid’s LDL receptor, whereas 3-hydroxy-3-methylglutaryl-CoA reductase and 25-hydroxycholesterol 7-alpha-hydroxylase were downregulated, with an intratumoral increase of the 27-HC metabolite. Furthermore, LDL promoted proliferation in both the Nthy-ori 3.1 and CAL-62 thyroid cellular models, but only in ATC cells was its cellular migration increased significantly. We conclude that cholesterol and intratumoral accumulation of 27-HC promote the aggressive behavior process of PTC. Targeting cholesterol metabolism could be a new therapeutic strategy in thyroid tumors with poor prognosis.
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Affiliation(s)
- Giovanna Revilla
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Departament de Bioquímica, Biologia Molecular i Biomedicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Monica de Pablo Pons
- Department of Endocrinology-EDUAB-HSP, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Lucía Baila-Rueda
- Unidad Clínica y de Investigación en Lípidos y Arteriosclerosis, Hospital Universitario Miguel Servet, Instituto de Investigación Sanitaria Aragón (IIS Aragón), Zaragoza, Spain.,CIBER de Enfermedades Cardiovasculares, CIBERCV, Madrid, Spain
| | - Annabel García-León
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - David Santos
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, CIBERDEM, Madrid, Spain
| | - Ana Cenarro
- CIBER de Enfermedades Cardiovasculares, CIBERCV, Madrid, Spain
| | - Marcelo Magalhaes
- Service of Endocrinology, Clinical Research Center (CEPEC), Hospital of the Federal University of Maranhão (HUUFMA), São Luís, Maranhão, Brazil
| | - R M Blanco
- CIBER Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
| | - Antonio Moral
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Department of General Surgery-Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Medicine Department, Autonomous University of Barcelona (UAB), Barcelona, Spain
| | - José Ignacio Pérez
- Department of General Surgery-Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Gerard Sabé
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Cintia González
- Department of Endocrinology-EDUAB-HSP, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,CIBER Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
| | - Victoria Fuste
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Department of Anatomic Pathology-Hospital de la Santa Creu i Sant Pau, UAB, Barcelona, Spain
| | - Enrique Lerma
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,Department of Anatomic Pathology-Hospital de la Santa Creu i Sant Pau, UAB, Barcelona, Spain
| | - Manuel Dos Santos Faria
- Service of Endocrinology, Clinical Research Center (CEPEC), Hospital of the Federal University of Maranhão (HUUFMA), São Luís, Maranhão, Brazil
| | - Alberto de Leiva
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,CIBER Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
| | - Rosa Corcoy
- Department of Endocrinology-EDUAB-HSP, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,CIBER Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain.,Medicine Department, Autonomous University of Barcelona (UAB), Barcelona, Spain
| | - Joan Carles Escolà-Gil
- Institut d'Investigacions Biomèdiques (IIB) Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain. .,Departament de Bioquímica, Biologia Molecular i Biomedicina, Universitat Autònoma de Barcelona, Barcelona, Spain. .,CIBER de Diabetes y Enfermedades Metabólicas Asociadas, CIBERDEM, Madrid, Spain.
| | - Eugenia Mato
- Department of Endocrinology-EDUAB-HSP, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain. .,CIBER Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain.
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109
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Sharma B, Agnihotri N. Role of cholesterol homeostasis and its efflux pathways in cancer progression. J Steroid Biochem Mol Biol 2019; 191:105377. [PMID: 31063804 DOI: 10.1016/j.jsbmb.2019.105377] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 04/09/2019] [Accepted: 05/04/2019] [Indexed: 12/27/2022]
Abstract
Tumor cells show high avidity for cholesterol in order to support their inherent nature to divide and proliferate. This results in the rewiring of cholesterol homeostatic pathways by influencing not only de novo synthesis but also uptake or efflux pathways of cholesterol. Recent findings have pointed towards the importance of cholesterol efflux in tumor pathogenesis. Cholesterol efflux is the first and foremost step in reverse cholesterol transport and any perturbation in this pathway may lead to the accumulation of intracellular cholesterol, thereby altering the cellular equilibrium. This review addresses the different mechanisms of cholesterol efflux from the cell and highlights their role and regulation in context to tumor development. There are four different routes by which cholesterol can be effluxed from the cell namely, 1) passive diffusion of cholesterol to mature HDL particles, 2) SR-B1 mediated facilitated diffusion, 3) Active efflux to apo A1 via ABCA1 and 4) ABCG1 mediated efflux to mature HDL. These molecular players facilitating cholesterol efflux are engaged in a complex interplay with different signaling pathways. Thus, an understanding of the efflux pathways, their regulation and cross-talk with signaling molecules may provide novel prognostic markers and therapeutic targets to combat the onset of carcinogenesis.
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Affiliation(s)
- Bhoomika Sharma
- Department of Biochemistry, BMS-Block II, Panjab University, Sector-25, Chandigarh, 160014, India.
| | - Navneet Agnihotri
- Department of Biochemistry, BMS-Block II, Panjab University, Sector-25, Chandigarh, 160014, India.
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110
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24S-hydroxycholesterol alters activity of large-conductance Ca 2+-dependent K + (slo1 BK) channel through intercalation into plasma membrane. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1525-1535. [PMID: 31136842 DOI: 10.1016/j.bbalip.2019.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 05/11/2019] [Accepted: 05/20/2019] [Indexed: 11/24/2022]
Abstract
Oxysterols, oxidization products of cholesterol, are regarded as bioactive lipids affecting various physiological functions. However, little is known of their effects on ion channels. Using inside-out patch clamp recording, we found that naturally occurring side-chain oxidized oxysterols, 20S‑hydroxycholesterol, 22R‑hydroxycholesterol, 24S‑hydroxycholestero, 25‑hydroxycholesterol, and 27‑hydroxycholesterol, induced current reduction of large-conductance Ca2+- and voltage-activated K+ (slo1 BK) channels heterologously expressed in HEK293T cells. In contrast with side-chain oxidized oxysterols, naturally occurring ring oxidized ones, 7α‑hydroxycholesterol and 7‑ketocholesterol were without effect. By using 24S‑hydroxycholesterol (24S‑HC), the major brain oxysterol, we explored the inhibition mechanism. 24S‑HC inhibited Slo1 BK channels with an IC50 of ~2 μM, and decreased macroscopic current by ~60%. This marked current decrease was accompanied by a rightward shift in the conductance-voltage relationship and a slowed activation kinetics, with the deactivation kinetics unaltered. Furthermore, the membrane sterol scavenger γ‑cyclodextrin was found to rescue slo1 BK channels from the inhibition, implicating that 24S-HC may be intercalated into the plasma membrane to affect the channel. These findings unveil a novel physiological importance of oxysterols from a new angle that involves ion channel regulation.
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111
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Paz JL, Levy D, Oliveira BA, de Melo TC, de Freitas FA, Reichert CO, Rodrigues A, Pereira J, Bydlowski SP. 7-Ketocholesterol Promotes Oxiapoptophagy in Bone Marrow Mesenchymal Stem Cell from Patients with Acute Myeloid Leukemia. Cells 2019; 8:E482. [PMID: 31117185 PMCID: PMC6562391 DOI: 10.3390/cells8050482] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/01/2019] [Accepted: 05/07/2019] [Indexed: 02/06/2023] Open
Abstract
7-Ketocholesterol (7-KC) is a cholesterol oxidation product with several biological functions. 7-KC has the capacity to cause cell death depending on the concentration and specific cell type. Mesenchymal stem cells (MSCs) are multipotent cells with the ability to differentiate into various types of cells, such as osteoblasts and adipocytes, among others. MSCs contribute to the development of a suitable niche for hematopoietic stem cells, and are involved in the development of diseases, such as leukemia, to a yet unknown extent. Here, we describe the effect of 7-KC on the death of bone marrow MSCs from patients with acute myeloid leukemia (LMSCs). LMSCs were less susceptible to the death-promoting effect of 7-KC than other cell types. 7-KC exposure triggered the extrinsic pathway of apoptosis with an increase in activated caspase-8 and caspase-3 activity. Mechanisms other than caspase-dependent pathways were involved. 7-KC increased ROS generation by LMSCs, which was related to decreased cell viability. 7-KC also led to disruption of the cytoskeleton of LMSCs, increased the number of cells in S phase, and decreased the number of cells in the G1/S transition. Autophagosome accumulation was also observed. 7-KC downregulated the SHh protein in LMSCs but did not change the expression of SMO. In conclusion, oxiapoptophagy (OXIdative stress + APOPTOsis + autophagy) seems to be activated by 7-KC in LMSCs. More studies are needed to better understand the role of 7-KC in the death of LMSCs and the possible effects on the SHh pathway.
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Affiliation(s)
- Jessica Liliane Paz
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
| | - Debora Levy
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
| | - Beatriz Araujo Oliveira
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
| | - Thatiana Correia de Melo
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
| | - Fabio Alessandro de Freitas
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
| | - Cadiele Oliana Reichert
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
| | - Alessandro Rodrigues
- Departmento de Ciencias Exactas e da Terra, Universidade Federal de Sao Paulo, Diadema 09972-270, SP, Brazil.
| | - Juliana Pereira
- Center of Innovation and Translational Medicine, Department of Medicine, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
| | - Sergio Paulo Bydlowski
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
- Center of Innovation and Translational Medicine, Department of Medicine, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo 05403-000, SP, Brazil.
- National Institute of Science and Technology for Regenerative Medicine (INCT Regenera), CNPq, Rio de Janeiro 21941-902, Brazil.
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112
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Ma L, Nelson ER. Oxysterols and nuclear receptors. Mol Cell Endocrinol 2019; 484:42-51. [PMID: 30660701 DOI: 10.1016/j.mce.2019.01.016] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 01/08/2019] [Accepted: 01/16/2019] [Indexed: 12/11/2022]
Abstract
Oxysterols are derivatives of cholesterol and an important regulator of cholesterol metabolism, in part due to their role as ligands for nuclear receptors, such as the liver X receptors. Oxysterols are also known to be ligands for the RAR-related orphan receptors, involved in normal T cell differentiation. However, increasing evidence supports a role for oxysterols in the progression of several diseases. Here, we review recent developments in oxysterol research, highlighting the biological functions that oxysterols exert through their target nuclear receptors: the liver X receptors, estrogen receptors, RAR-related orphan receptors and the glucocorticoid receptor. We also bring the regulation of the immune system into the context of interaction between oxysterols and nuclear receptors, discussing the effect of such interaction on the pro-inflammatory function of macrophages and the development of T cells. Finally, we examine the impact that oxysterols have on various disease models, including cancer, Alzheimer's disease and atherosclerosis, stressing the role of nuclear receptors if previously identified. This review underscores the need to consider the multifaceted roles of oxysterols in terms of multiple receptor engagements and selective modulation of these receptors.
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Affiliation(s)
- Liqian Ma
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Erik R Nelson
- Department of Molecular and Integrative Physiology, University of Illinois at Urbana-Champaign, Urbana, IL, United States; University of Illinois Cancer Center, Chicago, IL, United States; Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Carl R. Woese Institute for Genomic Biology, Anticancer Discovery from Pets to People Theme, University of Illinois at Urbana Champaign, Urbana, IL, United States; Cancer Center at Illinois, University of Illinois at Urbana-Champaign, IL, United States.
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113
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Crucial role of the hydroxyl group orientation in Langmuir monolayers organization–The case of 7-hydroxycholesterol epimers. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.12.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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114
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Wang S, Yao Y, Rao C, Zheng G, Chen W. 25-HC decreases the sensitivity of human gastric cancer cells to 5-fluorouracil and promotes cells invasion via the TLR2/NF-κB signaling pathway. Int J Oncol 2019; 54:966-980. [PMID: 30664194 PMCID: PMC6365050 DOI: 10.3892/ijo.2019.4684] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 12/10/2018] [Indexed: 02/06/2023] Open
Abstract
Hyperlipidemia is associated with metastasis in patients with gastric cancer (GC). 25-Hydroxycholesterol (25-HC) is a type of oxysterol which is synthesized from cholesterol and is involved in a number of processes, including inflammation, immune responses and cancer development. However, the role of 25-HC in gastric cancer remains unknown. In the present study, we demonstrated that 25-HC had no effects on GC cell proliferation and apoptosis, whereas it decreased the sensitivity of GC cells to 5-fluorouracil (5-FU), as demonstrated by the increased cell proliferation and the decreased cell apoptosis. On the other hand, exposure to 2.5-10 µM of 25-HC significantly promoted GC invasion, both in vitro (using AGS and MGC-803 GC cell lines) and in vivo (in an animal model), accompanied by the upregulation of the expression levels of matrix metalloproteinases (MMPs). Further investigations revealed that the promotion of GC invasion was, at least in part due to the activation of Toll-like receptor 2 (TLR2)/nuclear factor (NF)-κB signaling. Our results demonstrated that 25-HC promoted GC cells invasion by upregulating TLR2/NF-κB-mediated MMP expression. Thus, on the whole, the findings of this study suggest a novel mechanism of hyperlipidemia-induced GC progression.
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Affiliation(s)
- Saisai Wang
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310003, P.R. China
| | - Yuanyuan Yao
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310003, P.R. China
| | - Chunhui Rao
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310003, P.R. China
| | - Gang Zheng
- Department of Cardiology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
| | - Wenbin Chen
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310003, P.R. China
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115
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Zielinski ZAM, Pratt DA. H-Atom Abstraction vs Addition: Accounting for the Diverse Product Distribution in the Autoxidation of Cholesterol and Its Esters. J Am Chem Soc 2019; 141:3037-3051. [DOI: 10.1021/jacs.8b11524] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Zosia A. M. Zielinski
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Derek A. Pratt
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
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116
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Putkaradze N, Litzenburger M, Hutter MC, Bernhardt R. CYP109E1 from Bacillus megaterium
Acts as a 24- and 25-Hydroxylase for Cholesterol. Chembiochem 2019; 20:655-658. [DOI: 10.1002/cbic.201800595] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Natalia Putkaradze
- Institute of Biochemistry; Saarland University; Campus, Building B2.2 66123 Saarbrücken Germany
| | - Martin Litzenburger
- Institute of Biochemistry; Saarland University; Campus, Building B2.2 66123 Saarbrücken Germany
| | | | - Rita Bernhardt
- Institute of Biochemistry; Saarland University; Campus, Building B2.2 66123 Saarbrücken Germany
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117
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Kovač U, Skubic C, Bohinc L, Rozman D, Režen T. Oxysterols and Gastrointestinal Cancers Around the Clock. Front Endocrinol (Lausanne) 2019; 10:483. [PMID: 31379749 PMCID: PMC6653998 DOI: 10.3389/fendo.2019.00483] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 07/03/2019] [Indexed: 12/24/2022] Open
Abstract
This review focuses on the role of oxidized sterols in three major gastrointestinal cancers (hepatocellular carcinoma, pancreatic, and colon cancer) and how the circadian clock affects the carcinogenesis by regulating the lipid metabolism and beyond. While each field of research (cancer, oxysterols, and circadian clock) is well-studied within their specialty, little is known about the intertwining mechanisms and how these influence the disease etiology in each cancer type. Oxysterols are involved in pathology of these cancers, but final conclusions about their protective or damaging effects are elusive, since the effect depends on the type of oxysterol, concentration, and the cell type. Oxysterol concentrations, the expression of key regulators liver X receptors (LXR), farnesoid X receptor (FXR), and oxysterol-binding proteins (OSBP) family are modulated in tumors and plasma of cancer patients, exposing these proteins and selected oxysterols as new potential biomarkers and drug targets. Evidence about how cholesterol/oxysterol pathways are intertwined with circadian clock is building. Identified key contact points are different forms of retinoic acid receptor related orphan receptors (ROR) and LXRs. RORs and LXRs are both regulated by sterols/oxysterols and the circadian clock and in return also regulate the same pathways, representing a complex interplay between sterol metabolism and the clock. With this in mind, in addition to classical therapies to modulate cholesterol in gastrointestinal cancers, such as the statin therapy, the time is ripe also for therapies where time and duration of the drug application is taken as an important factor for successful therapies. The final goal is the personalized approach with chronotherapy for disease management and treatment in order to increase the positive drug effects.
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118
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Levy D, de Melo TC, Oliveira BA, Paz JL, de Freitas FA, Reichert CO, Rodrigues A, Bydlowski SP. 7-Ketocholesterol and cholestane-triol increase expression of SMO and LXRα signaling pathways in a human breast cancer cell line. Biochem Biophys Rep 2018; 19:100604. [PMID: 31463370 PMCID: PMC6709374 DOI: 10.1016/j.bbrep.2018.12.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/14/2018] [Accepted: 12/20/2018] [Indexed: 02/07/2023] Open
Abstract
Oxysterols are 27-carbon oxidation products of cholesterol metabolism. Oxysterols possess several biological actions, including the promotion of cell death. Here, we examined the ability of 7-ketocholesterol (7-KC), cholestane-3β-5α-6β-triol (triol), and a mixture of 5α-cholestane-3β,6β-diol and 5α-cholestane-3β,6α-diol (diol) to promote cell death in a human breast cancer cell line (MDA-MB-231). We determined cell viability, after 24-h incubation with oxysterols. These oxysterols promoted apoptosis. At least part of the observed effects promoted by 7-KC and triol arose from an increase in the expression of the sonic hedgehog pathway mediator, smoothened. However, this increased expression was apparently independent of sonic hedgehog expression, which did not change. Moreover, these oxysterols led to increased expression of LXRα, which is involved in cellular cholesterol efflux, and the ATP-binding cassette transporters, ABCA1 and ABCG1. Diols did not affect these pathways. These results suggested that the sonic hedgehog and LXRα pathways might be involved in the apoptotic process promoted by 7-KC and triol.
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Affiliation(s)
- Debora Levy
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | - Thatiana Correa de Melo
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | - Beatriz A. Oliveira
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | - Jessica L. Paz
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | - Fabio A. de Freitas
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | - Cadiele O. Reichert
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | | | - Sergio P. Bydlowski
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
- Instituto Nacional de Ciencia e Tecnologia em Medicina Regenerativa (INCT-Regenera), CNPq, Brazil
- Correspondence to: Department of Hematology, Faculdade de Medicina, Universidade de Sao Paulo, Av.Dr. Enéas de Carvalho Aguiar,155, 1st floor, room 43, 05403-000 São Paulo, SP, Brazil.
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119
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Evaluation of Antioxidant, Anti-Inflammatory and Cytoprotective Properties of Ethanolic Mint Extracts from Algeria on 7-Ketocholesterol-Treated Murine RAW 264.7 Macrophages. Antioxidants (Basel) 2018; 7:antiox7120184. [PMID: 30563252 PMCID: PMC6315783 DOI: 10.3390/antiox7120184] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 11/21/2018] [Accepted: 12/03/2018] [Indexed: 12/19/2022] Open
Abstract
The present study consisted in evaluating the antioxidant, anti-inflammatory and cytoprotective properties of ethanolic extracts from three mint species (Mentha spicata L. (MS), Mentha pulegium L. (MP) and Mentha rotundifolia (L.) Huds (MR)) with biochemical methods on murine RAW 264.7 macrophages (a transformed macrophage cell line isolated from ascites of BALB/c mice infected by the Abelson leukemia virus). The total phenolic, flavonoid and carotenoid contents were determined with spectrophotometric methods. The antioxidant activities were quantified with the Kit Radicaux Libres (KRLTM), the ferric reducing antioxidant power (FRAP) and the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assays. The MS extract showed the highest total phenolic content, and the highest antioxidant capacity, while the MR extract showed the lowest total phenolic content and the lowest antioxidant capacity. The cytoprotective and anti-inflammatory activities of the extracts were quantified on murine RAW 264.7 macrophages treated with 7-ketocholesterol (7KC; 20 µg/mL: 50 µM) associated or not for 24 h and 48 h with ethanolic mint extracts used at different concentrations (25, 50, 100, 200 and 400 µg/mL). Under treatment with 7KC, an important inhibition of cell growth was revealed with the crystal violet test. This side effect was strongly attenuated in a dose dependent manner with the different ethanolic mint extracts, mainly at 48 h. The most important cytoprotective effect was observed with the MS extract. In addition, the effects of ethanolic mint extracts on cytokine secretion (Interleukin (IL)-6, IL-10, Monocyte Chemoattractant Protein (MCP)-1, Interferon (IFN)-ϒ, Tumor necrosis factor (TNF)-α) were determined at 24 h on lipopolysaccharide (LPS, 0.2 µg/mL)-, 7KC (20 µg/mL)- and (7KC + LPS)-treated RAW 264.7 cells. Complex effects of mint extracts were observed on cytokine secretion. However, comparatively to LPS-treated cells, all the extracts strongly reduce IL-6 secretion and two of them (MP and MR) also decrease MCP-1 and TNF-α secretion. However, no anti-inflammatory effects were observed on 7KC- and (7KC + LPS)-treated cells. Altogether, these data bring new evidences on the potential benefits (especially antioxidant and cytoprotective properties) of Algerian mint on human health.
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120
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Soucek P, Vrana D, Ueng YF, Wei S, Kozevnikovova R, Guengerich FP. Selective changes in cholesterol metabolite levels in plasma of breast cancer patients after tumor removal. Clin Chem Lab Med 2018; 56:e78-e81. [PMID: 28915107 DOI: 10.1515/cclm-2017-0409] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 08/10/2017] [Indexed: 11/15/2022]
Affiliation(s)
- Pavel Soucek
- Department of Toxicogenomics, National Institute of Public Health, Srobarova 48, Prague, 100 42, Czech Republic, Phone: +420 267082711
- Biomedical Centre, Medical School Pilsen, Charles University, Pilsen, Czech Republic
| | - David Vrana
- Department of Oncology, Palacky University Medical School and Teaching Hospital, Olomouc, Czech Republic
| | - Yune-Fang Ueng
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei, Taiwan
- Department of Pharmacology, National Yang-Ming University, Taipei, Taiwan
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Shouzou Wei
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
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121
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Oxysterols selectively promote short-term apoptosis in tumor cell lines. Biochem Biophys Res Commun 2018; 505:1043-1049. [DOI: 10.1016/j.bbrc.2018.10.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 10/01/2018] [Indexed: 02/07/2023]
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122
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Obniski R, Sieber M, Spradling AC. Dietary Lipids Modulate Notch Signaling and Influence Adult Intestinal Development and Metabolism in Drosophila. Dev Cell 2018; 47:98-111.e5. [PMID: 30220569 PMCID: PMC6894183 DOI: 10.1016/j.devcel.2018.08.013] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/14/2018] [Accepted: 08/16/2018] [Indexed: 12/30/2022]
Abstract
Tissue homeostasis involves a complex balance of developmental signals and environmental cues that dictate stem cell function. We found that dietary lipids control enteroendocrine cell production from Drosophila posterior midgut stem cells. Dietary cholesterol influences new intestinal cell differentiation in an Hr96-dependent manner by altering the level and duration of Notch signaling. Exogenous lipids modulate Delta ligand and Notch extracellular domain stability and alter their trafficking in endosomal vesicles. Lipid-modulated Notch signaling occurs in other nutrient-dependent tissues, suggesting that Delta trafficking in many cells is sensitive to cellular sterol levels. These diet-mediated alterations in young animals contribute to a metabolic program that persists after the diet changes. A low-sterol diet also slows the proliferation of enteroendocrine tumors initiated by Notch pathway disruption. Thus, a specific dietary nutrient can modify a key intercellular signaling pathway to shift stem cell differentiation and cause lasting changes in tissue structure and physiology.
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Affiliation(s)
- Rebecca Obniski
- Department of Embryology, Howard Hughes Medical Institute Research Laboratories, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA
| | - Matthew Sieber
- Department of Embryology, Howard Hughes Medical Institute Research Laboratories, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA; Department of Physiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9040, USA
| | - Allan C Spradling
- Department of Embryology, Howard Hughes Medical Institute Research Laboratories, Carnegie Institution for Science, 3520 San Martin Drive, Baltimore, MD 21218, USA.
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123
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Kaczyński ŁK, Cais-Sokolińska D, Rudzińska M. Cholesterol oxidation products in kefir from goats’ milk during storage. Int Dairy J 2018. [DOI: 10.1016/j.idairyj.2018.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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124
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Holy P, Kloudova A, Soucek P. Importance of genetic background of oxysterol signaling in cancer. Biochimie 2018; 153:109-138. [DOI: 10.1016/j.biochi.2018.04.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 04/27/2018] [Indexed: 12/14/2022]
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125
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Upregulation of 24(R/S),25-epoxycholesterol and 27-hydroxycholesterol suppresses the proliferation and migration of gastric cancer cells. Biochem Biophys Res Commun 2018; 504:892-898. [PMID: 30224060 DOI: 10.1016/j.bbrc.2018.09.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 09/10/2018] [Indexed: 12/21/2022]
Abstract
Gastric cancer (GC) is one of the most common cancers and is the second-leading cause of cancer-associated morbidity worldwide. Oxysterols are oxidized derivatives of cholesterol that may be important in many biological processes, but the levels and roles of oxysterols in gastric tumours remain to be elucidated. The levels of cholesterol, oxysterols and sulfated oxysterols in human gastric tumour tissues, adjacent normal mucosal tissues, cancerous gastric juice and gastric juice obtained from healthy subjects were detected by LC-MS. It was found that the levels of 24(R/S),25-EC and 27HC in human gastric tumour tissues and cancerous gastric juice were significantly increased compared with those of adjacent normal mucosal tissues and gastric juice from healthy subjects. Compared with normal gastric mucosal tissue, the levels of sulfated 25-hydroxycholesterol (25HC3S) and the ratio of 25HC3S/25HC were decreased in human gastric tumour tissues, which might be related to the dramatically decreased SULT2A1 expression in gastric tumour tissue. Both 24(R/S),25-EC and 27HC suppressed gastric cancer proliferation, which was not altered by LXRα-siRNA treatment. The suppression of cell proliferation induced by 27HC was attenuated by LXRβ-siRNA, but the suppression of cell proliferation induced by 24(R/S),25-EC was intensified by LXRβ-siRNA. Both 24(R/S),25-EC and 27HC dramatically inhibited HGC-27 cell migration, which was attenuated by the co-transfection of cells with LXRα-siRNA and LXRβ-siRNA, but not LXRα-siRNA or LXRβ-siRNA alone. In conclusion, the accumulated 24(R/S),25-EC and 27HC in human gastric tumour tissues might play important roles in gastric cancer development.
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126
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Heilos D, Röhrl C, Pirker C, Englinger B, Baier D, Mohr T, Schwaiger M, Iqbal SM, van Schoonhoven S, Klavins K, Eberhart T, Windberger U, Taibon J, Sturm S, Stuppner H, Koellensperger G, Dornetshuber-Fleiss R, Jäger W, Lemmens-Gruber R, Berger W. Altered membrane rigidity via enhanced endogenous cholesterol synthesis drives cancer cell resistance to destruxins. Oncotarget 2018; 9:25661-25680. [PMID: 29876015 PMCID: PMC5986646 DOI: 10.18632/oncotarget.25432] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/25/2018] [Indexed: 12/31/2022] Open
Abstract
Destruxins, secondary metabolites of entomopathogenic fungi, exert a wide variety of interesting characteristics ranging from antiviral to anticancer effects. Although their mode of action was evaluated previously, the molecular mechanisms of resistance development are unknown. Hence, we have established destruxin-resistant sublines of HCT116 colon carcinoma cells by selection with the most prevalent derivatives, destruxin (dtx)A, dtxB and dtxE. Various cell biological and molecular techniques were applied to elucidate the regulatory mechanisms underlying these acquired and highly stable destruxin resistance phenotypes. Interestingly, well-known chemoresistance-mediating ABC efflux transporters were not the major players. Instead, in dtxA- and dtxB-resistant cells a hyper-activated mevalonate pathway was uncovered resulting in increased de-novo cholesterol synthesis rates and elevated levels of lanosterol, cholesterol as well as several oxysterol metabolites. Accordingly, inhibition of the mevalonate pathway at two different steps, using either statins or zoledronic acid, significantly reduced acquired but also intrinsic destruxin resistance. Vice versa, cholesterol supplementation protected destruxin-sensitive cells against their cytotoxic activity. Additionally, an increased cell membrane adhesiveness of dtxA-resistant as compared to parental cells was detected by atomic force microscopy. This was paralleled by a dramatically reduced ionophoric capacity of dtxA in resistant cells when cultured in absence but not in presence of statins. Summarizing, our results suggest a reduced ionophoric activity of destruxins due to cholesterol-mediated plasma membrane re-organization as molecular mechanism underlying acquired destruxin resistance in human colon cancer cells. Whether this mechanism might be valid also in other cell types and organisms exposed to destruxins e.g. as bio-insecticides needs to be evaluated.
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Affiliation(s)
- Daniela Heilos
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Comprehensive Cancer Center of the Medical University of Vienna, Vienna, Austria
- Department of Pharmacology and Toxicology, University of Vienna, Vienna, Austria
| | - Clemens Röhrl
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - Christine Pirker
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Comprehensive Cancer Center of the Medical University of Vienna, Vienna, Austria
| | - Bernhard Englinger
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Comprehensive Cancer Center of the Medical University of Vienna, Vienna, Austria
| | - Dina Baier
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Comprehensive Cancer Center of the Medical University of Vienna, Vienna, Austria
- Decentralized Biomedical Facilities of the Medical University of Vienna, Vienna, Austria
| | - Thomas Mohr
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Comprehensive Cancer Center of the Medical University of Vienna, Vienna, Austria
| | - Michaela Schwaiger
- Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | | | - Sushilla van Schoonhoven
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Comprehensive Cancer Center of the Medical University of Vienna, Vienna, Austria
| | | | - Tanja Eberhart
- Center for Pathobiochemistry and Genetics, Medical University of Vienna, Vienna, Austria
| | - Ursula Windberger
- Decentralized Biomedical Facilities of the Medical University of Vienna, Vienna, Austria
| | - Judith Taibon
- Institute of Pharmacy, Pharmacognosy and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Sonja Sturm
- Institute of Pharmacy, Pharmacognosy and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Hermann Stuppner
- Institute of Pharmacy, Pharmacognosy and Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Gunda Koellensperger
- Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
- Vienna Metabolomics Center, University of Vienna, Vienna, Austria
| | - Rita Dornetshuber-Fleiss
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Comprehensive Cancer Center of the Medical University of Vienna, Vienna, Austria
- Department of Pharmacology and Toxicology, University of Vienna, Vienna, Austria
| | - Walter Jäger
- Department of Pharmaceutical Chemistry, Division of Clinical Pharmacy and Diagnostics, University of Vienna, Vienna, Austria
| | - Rosa Lemmens-Gruber
- Department of Pharmacology and Toxicology, University of Vienna, Vienna, Austria
| | - Walter Berger
- Institute of Cancer Research, Department of Internal Medicine I, Medical University of Vienna, Comprehensive Cancer Center of the Medical University of Vienna, Vienna, Austria
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Sadler NC, Webb-Robertson BJM, Clauss TR, Pounds JG, Corley R, Wright AT. High-Fat Diets Alter the Modulatory Effects of Xenobiotics on Cytochrome P450 Activities. Chem Res Toxicol 2018; 31:308-318. [PMID: 29688711 DOI: 10.1021/acs.chemrestox.8b00008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cytochrome P450 monooxygenase (P450) enzymes metabolize critical endogenous chemicals and oxidize nearly all xenobiotics. Dysregulated P450 activities lead to altered capacity for drug metabolism and cellular stress. The effects of mixed exposures on P450 expression and activity are variable and elusive. A high-fat diet (HFD) is a common exposure that results in obesity and associated pathologies including hepatotoxicity. Herein, we report the effects of cigarette smoke on P450 activities of normal weight and HFD induced obese mice. Activity-based protein profiling results indicate that HFD mice had significantly decreased P450 activity, likely instigated by proinflammatory chemicals, and that P450 enzymes involved in detoxification, xenobiotic metabolism, and bile acid synthesis were effected by HFD and smoke interaction. Smoking increased activity of all lung P450 and coexposure to diet effected P450 2s1. We need to expand our understanding of common exposures coupled to altered P450 metabolism to enhance the safety and efficacy of therapeutic drug dosing.
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Affiliation(s)
- Natalie C Sadler
- Chemical Biology & Exposure Sciences, Biological Sciences Division , Pacific Northwest National Laboratory , Richland , Washington 99352 United States
| | - Bobbie-Jo M Webb-Robertson
- Chemical Biology & Exposure Sciences, Biological Sciences Division , Pacific Northwest National Laboratory , Richland , Washington 99352 United States
| | - Therese R Clauss
- Chemical Biology & Exposure Sciences, Biological Sciences Division , Pacific Northwest National Laboratory , Richland , Washington 99352 United States
| | - Joel G Pounds
- Chemical Biology & Exposure Sciences, Biological Sciences Division , Pacific Northwest National Laboratory , Richland , Washington 99352 United States
| | - Richard Corley
- Chemical Biology & Exposure Sciences, Biological Sciences Division , Pacific Northwest National Laboratory , Richland , Washington 99352 United States
| | - Aaron T Wright
- Chemical Biology & Exposure Sciences, Biological Sciences Division , Pacific Northwest National Laboratory , Richland , Washington 99352 United States
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128
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Cais-Sokolińska D, Rudzińska M. Short communication: Cholesterol oxidation products in traditional buttermilk. J Dairy Sci 2018; 101:3829-3834. [DOI: 10.3168/jds.2017-13942] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 01/03/2018] [Indexed: 01/22/2023]
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129
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Sottero B, Leonarduzzi G, Testa G, Gargiulo S, Poli G, Biasi F. Lipid Oxidation Derived Aldehydes and Oxysterols Between Health and Disease. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201700047] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Barbara Sottero
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino; Regione Gonzole 10 10043 Orbassano (Torino) Italy
| | - Gabriella Leonarduzzi
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino; Regione Gonzole 10 10043 Orbassano (Torino) Italy
| | - Gabriella Testa
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino; Regione Gonzole 10 10043 Orbassano (Torino) Italy
| | - Simona Gargiulo
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino; Regione Gonzole 10 10043 Orbassano (Torino) Italy
| | - Giuseppe Poli
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino; Regione Gonzole 10 10043 Orbassano (Torino) Italy
| | - Fiorella Biasi
- Department of Clinical and Biological Sciences, San Luigi Hospital, University of Torino; Regione Gonzole 10 10043 Orbassano (Torino) Italy
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130
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Oxysterols Increase Inflammation, Lipid Marker Levels and Reflect Accelerated Endothelial Dysfunction in Experimental Animals. Mediators Inflamm 2018; 2018:2784701. [PMID: 29713239 PMCID: PMC5866902 DOI: 10.1155/2018/2784701] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Accepted: 01/15/2018] [Indexed: 12/05/2022] Open
Abstract
Objective Oxidized cholesterol derivatives are thought to exert atherogenic effect thus adversely affecting vascular endothelium. The aim of the study was to assess the effect of 5α,6α-epoxycholesterol on experimentally induced hypercholesterolemia in rabbits, and the levels of homocysteine (HCY), asymmetric dimethylarginine (ADMA), paraoxonase-1 (PON-1), and inflammatory parameters (IL-6, TNF-α, CRP). Material and methods The rabbits were divided into 3 groups, 8 animals each, and fed with basic fodder (C), basic fodder plus cholesterol (Ch) or basic fodder plus 5α,6α-epoxycholesterol, and unoxidized cholesterol (ECh). Serum concentrations of studied parameters were determined at 45-day intervals. The study was continued for six months. Results We demonstrated that adding 5α,6α-epoxycholesterol to basic fodder significantly affected lipid status of the experimental animals, increasing total cholesterol and LDL cholesterol levels, as well as HCY and ADMA levels, whilst leaving the PON-1 activity unaffected. Additionally, the ECh group presented with significantly higher concentrations of inflammatory biomarkers (IL-6, TNF-α, and CRP). In the Ch group, lower yet significant (as compared to the C group) changes of levels of studied parameters were observed. Conclusion Exposure of animals with experimentally induced hypercholesterolemia to 5α,6α-epoxycholesterol increases dyslipidaemia, endothelial dysfunction, and inflammatory response.
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131
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Bryonolic Acid Blocks Cancer Cell Clonogenicity and Invasiveness through the Inhibition of Fatty Acid: Cholesteryl Ester Formation. Biomedicines 2018; 6:biomedicines6010021. [PMID: 29439506 PMCID: PMC5874678 DOI: 10.3390/biomedicines6010021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 01/28/2018] [Accepted: 02/09/2018] [Indexed: 11/23/2022] Open
Abstract
Bryonolic acid (BrA) is a pentacyclic triterpene present in several plants used in African traditional medicine such as Anisophyllea dichostyla R. Br. Here we investigated the in vitro anticancer properties of BrA. We report that BrA inhibits acyl-coA: cholesterol acyl transferase (ACAT) activity in rat liver microsomes in a concentration-dependent manner, blocking the biosynthesis of the cholesterol fatty acid ester tumour promoter. We next demonstrated that BrA inhibits ACAT in intact cancer cells with an IC50 of 12.6 ± 2.4 µM. BrA inhibited both clonogenicity and invasiveness of several cancer cell lines, establishing that BrA displays specific anticancer properties. BrA appears to be more potent than the other pentacyclic triterpenes, betulinic acid and ursolic acid studied under similar conditions. The inhibitory effect of BrA was reversed by exogenous addition of cholesteryl oleate, showing that ACAT inhibition is responsible for the anticancer effect of BrA. This report reveals new anticancer properties for BrA.
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132
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Favero GM, Paz JL, Otake AH, Maria DA, Caldini EG, de Medeiros RSS, Deus DF, Chammas R, Maranhão RC, Bydlowski SP. Cell internalization of 7-ketocholesterol-containing nanoemulsion through LDL receptor reduces melanoma growth in vitro and in vivo: a preliminary report. Oncotarget 2018; 9:14160-14174. [PMID: 29581835 PMCID: PMC5865661 DOI: 10.18632/oncotarget.24389] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 01/25/2018] [Indexed: 01/01/2023] Open
Abstract
Oxysterols are cholesterol oxygenated derivatives which possess several biological actions. Among oxysterols, 7-ketocholesterol (7KC) is known to induce cell death. Here, we hypothesized that 7KC cytotoxicity could be applied in cancer therapeutics. 7KC was incorporated into a lipid core nanoemulsion. As a cellular model the murine melanoma cell line B16F10 was used. The nanoparticle (7KCLDE) uptake into tumor cells was displaced by increasing amounts of low-density-lipoproteins (LDL) suggesting a LDL-receptor-mediated cell internalization. 7KCLDE was mainly cytostatic, which led to an accumulation of polyploid cells. Nevertheless, a single dose of 7KCLDE killed roughly 10% of melanoma cells. In addition, it was observed dissipation of the transmembrane potential, evidenced with flow cytometry; presence of autophagic vacuoles, visualized and quantified with flow cytometry and acridine orange; and presence of myelin figures, observed with ultrastructural microscopy. 7KCLDE impaired cytokenesis was accompanied by changes in cellular morphology into a fibroblastoid shape which is supported by cytoskeletal rearrangements, as shown by the increased actin polymerization. 7KCLDE was injected into B16 melanoma tumor-bearing mice. 7KCLDE accumulated in the liver and tumor. In melanoma tumor 7KCLDE promoted a >50% size reduction, enlarged the necrotic area, and reduced intratumoral vasculature. 7KCLDE increased the survival rates of animals, without hematologic or liver toxicity. Although more pre-clinical studies should be performed, our preliminary results suggested that 7KCLDE is a promising novel preparation for cancer chemotherapy.
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Affiliation(s)
- Giovani M Favero
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Department of General Biology, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Jessica L Paz
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Andréia H Otake
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Instituto do Cancer do Estado de Sao Paulo (ICESP), SP, Brazil
| | - Durvanei A Maria
- Biochemistry and Biophysics Laboratories, Instituto Butantan, Sao Paulo, SP, Brazil
| | - Elia G Caldini
- Laboratory for Cell Biology, Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Raphael S S de Medeiros
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Instituto do Cancer do Estado de Sao Paulo (ICESP), SP, Brazil
| | - Debora F Deus
- Laboratory of Metabolism and Lipids, Heart Institute (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Roger Chammas
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Instituto do Cancer do Estado de Sao Paulo (ICESP), SP, Brazil
| | - Raul C Maranhão
- Laboratory of Metabolism and Lipids, Heart Institute (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Faculdade de Ciencias Farmaceuticas, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Sergio P Bydlowski
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
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Lu DL, Sookthai D, Le Cornet C, Katzke VA, Johnson TS, Kaaks R, Fortner RT. Reproducibility of serum oxysterols and lanosterol among postmenopausal women: Results from EPIC-Heidelberg. Clin Biochem 2018; 52:117-122. [DOI: 10.1016/j.clinbiochem.2017.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 09/11/2017] [Accepted: 11/01/2017] [Indexed: 11/25/2022]
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134
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Leignadier J, Dalenc F, Poirot M, Silvente-Poirot S. Improving the efficacy of hormone therapy in breast cancer: The role of cholesterol metabolism in SERM-mediated autophagy, cell differentiation and death. Biochem Pharmacol 2017. [DOI: 10.1016/j.bcp.2017.06.120] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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135
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Ahmed D, Cassol E. Role of cellular metabolism in regulating type I interferon responses: Implications for tumour immunology and treatment. Cancer Lett 2017; 409:20-29. [PMID: 28888999 DOI: 10.1016/j.canlet.2017.08.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 08/21/2017] [Accepted: 08/25/2017] [Indexed: 12/31/2022]
Abstract
Type I interferons (IFN) are increasingly recognized for their role in regulating anti-tumour immune responses. However, chronic activation of these pathways can result in immunosuppression and has been linked to poor responses to genotoxic and radiotoxic therapies. Emerging evidence suggests energy, lipid and amino acid metabolism play an important role in regulating and fine tuning type I IFN responses. Further, dysregulation of these processes has been implicated in the pathogenesis of chronic viral infections and autoimmune disorders. Systematic evaluation of these interrelationships in cancer models and patients may have important implications for the development of targeted IFN based anti-cancer therapeutics with minimal toxicity and limited off target effects.
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Affiliation(s)
- Duale Ahmed
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | - Edana Cassol
- Department of Health Sciences, Carleton University, Ottawa, Ontario, Canada.
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