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Ramchoun M, Khouya T, Alibrahim EA, Hmidani A, Sellam K, Amrani S, Harnafi H, Benlyas M, Kasbi Chadli F, Ouguerram K, Alem C. Thymus atlanticus polyphenol-rich extract regulates cholesterol metabolism by inhibiting its biosynthesis without affecting its excretion in hamsters fed a high-fat diet. Arch Physiol Biochem 2020; 129:618-625. [PMID: 33320714 DOI: 10.1080/13813455.2020.1854308] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
CONTEXT Thymus atlanticus has been reported to have significant hypolipidaemic effect in animal models. However, the mechanism of this hypolipidaemic action still unknown. OBJECTIVE To determinate the possible mechanism(s) of hypolipidaemic action of a Thymus atlanticus polyphenol-rich extract (PRE). MATERIALS AND METHODS Plasma, faecal, and liver cholesterol, bile acid content in the faeces, and gene expression level of HMG-CoA reductase, CYP7A1, ABCG5 and ABCG8 were analysed after 9 weeks in hamsters feeding normal diet, high-fat diet (HFD) or HFD supplemented with 400 mg/kg body weight/day of PRE. RESULTS PRE significantly decreased total cholesterol content (p < .05) and HMG-CoA reductase expression (p < .05), but did not affect the faecal cholesterol, bile acid contents and CYP7A1 and ABCG5/G8 expression (p > .05). CONCLUSION We can conclude that the T. atlanticus extract is efficient in the alleviation of chronic hyperlipidaemia by acting as cholesterol biosynthesis inhibitor.
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Affiliation(s)
- Mhamed Ramchoun
- Laboratory of Biotechnology and Sustainable Development of Natural Resources, Polydisciplinary Faculty, University Sultan Moulay Slimane, Beni Mellal, Morocco
- Biochemistry and Natural Substances Team, Department of Biology, Faculty of Sciences & Techniques, University Moulay Ismail, Errachidia, Morocco
- Laboratory of Biochemistry and Biotechnologies, Department of Biology, Faculty of Sciences, University Mohamed I, Oujda, Morocco
| | - Tarik Khouya
- Biochemistry and Natural Substances Team, Department of Biology, Faculty of Sciences & Techniques, University Moulay Ismail, Errachidia, Morocco
| | - Eid Alabed Alibrahim
- INSERM U1063, Stress Oxydant et Pathologies Métaboliques, Université d'Angers, Université Bretagne-Loire, Angers, France
| | - Abdelbassat Hmidani
- Biochemistry and Natural Substances Team, Department of Biology, Faculty of Sciences & Techniques, University Moulay Ismail, Errachidia, Morocco
| | - Khalid Sellam
- Biochemistry and Natural Substances Team, Department of Biology, Faculty of Sciences & Techniques, University Moulay Ismail, Errachidia, Morocco
| | - Souliman Amrani
- Laboratory of Biochemistry and Biotechnologies, Department of Biology, Faculty of Sciences, University Mohamed I, Oujda, Morocco
| | - Hicham Harnafi
- Laboratory of Biochemistry and Biotechnologies, Department of Biology, Faculty of Sciences, University Mohamed I, Oujda, Morocco
| | - Mohamed Benlyas
- Biochemistry and Natural Substances Team, Department of Biology, Faculty of Sciences & Techniques, University Moulay Ismail, Errachidia, Morocco
| | - Fatima Kasbi Chadli
- INRA, UMR 1280, Physiologie des Adaptations Nutritionnelles, Nantes, France
- CRNH, Western Human Nutrition Research Centre, CHU Hôtel-Dieu, Nantes, France
| | - Khadija Ouguerram
- INRA, UMR 1280, Physiologie des Adaptations Nutritionnelles, Nantes, France
- CRNH, Western Human Nutrition Research Centre, CHU Hôtel-Dieu, Nantes, France
| | - Chakib Alem
- Biochemistry and Natural Substances Team, Department of Biology, Faculty of Sciences & Techniques, University Moulay Ismail, Errachidia, Morocco
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152
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Chae HS, Kim HJ, Ko HJ, Lee CH, Choi YH, Chin YW. Transcriptome Analysis Illuminates a Hub Role of SREBP2 in Cholesterol Metabolism by α-Mangostin. ACS OMEGA 2020; 5:31126-31136. [PMID: 33324821 PMCID: PMC7726933 DOI: 10.1021/acsomega.0c04282] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 11/09/2020] [Indexed: 05/08/2023]
Abstract
Whole-transcriptome analysis of α-mangostin-treated HepG2 cells revealed that genes relevant to lipid and cholesterol metabolic processes responded to α-mangostin treatment. α-Mangostin downregulated a series of cholesterol biosynthetic genes, including SQLE, HMGCR, and LSS, and controlled specific cholesterol trafficking-associated genes such as ABCA1, SOAT1, and PCSK9. In particular, the downregulation of SREBP2 expression highlighted SREBP2 as a key transcriptional factor controlling lipid or cholesterol metabolic processes. Gene network analysis of SREBP2 and responses of its target proteins demonstrated that the effect of α-mangostin on HepG2 cells was mediated by the downregulation of SREBP2 expression, which was further supported by the reduction of the amount of SREBP2-SCAP complex. In the presence of exogenous cholesterols, α-mangostin downregulated SREBP2 expression and suppressed PCSK9 synthesis, which might contribute to the increased cholesterol uptake in cells, in part explaining the cholesterol-lowering effect of α-mangostin.
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Affiliation(s)
- Hee-Sung Chae
- College
of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University Seoul, 32 Dongguk-lo, Ilsandong-gu, Goyang-si, Gyeonggi-do 10326, Republic of Korea
| | - Hyun Ji Kim
- College
of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University Seoul, 32 Dongguk-lo, Ilsandong-gu, Goyang-si, Gyeonggi-do 10326, Republic of Korea
| | - Hyun-Jeong Ko
- Laboratory
of Microbiology and Immunology, College of Pharmacy, Kangwon National University, 1 Gangwondaehakgil, Chuncheon-si, Gangwon-do 24341, Republic of Korea
| | - Chang Hoon Lee
- College
of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University Seoul, 32 Dongguk-lo, Ilsandong-gu, Goyang-si, Gyeonggi-do 10326, Republic of Korea
| | - Young Hee Choi
- College
of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University Seoul, 32 Dongguk-lo, Ilsandong-gu, Goyang-si, Gyeonggi-do 10326, Republic of Korea
| | - Young-Won Chin
- College
of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-lo, Gwanak-gu, Seoul 08826, Republic
of Korea
- E-mail: . Phone: +82 2 880 7859
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153
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Lipid Regulatory Proteins as Potential Therapeutic Targets for Ovarian Cancer in Obese Women. Cancers (Basel) 2020; 12:cancers12113469. [PMID: 33233362 PMCID: PMC7700662 DOI: 10.3390/cancers12113469] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/18/2020] [Accepted: 11/20/2020] [Indexed: 02/07/2023] Open
Abstract
Obesity has become a recognized global epidemic that is associated with numerous comorbidities including type II diabetes, cardiovascular disease, hypertension, and cancer incidence and progression. Ovarian cancer (OvCa) has a unique mechanism of intra-peritoneal metastasis, already present in 80% of women at the time of diagnosis, making it the fifth leading cause of death from gynecological malignancy. Meta-analyses showed that obesity increases the risk of OvCa progression, leads to enhanced overall and organ-specific tumor burden, and adversely effects survival of women with OvCa. Recent data discovered that tumors grown in mice fed on a western diet (40% fat) have elevated lipid levels and a highly increased expression level of sterol regulatory element binding protein 1 (SREBP1). SREBP1 is a master transcription factor that regulates de novo lipogenesis and lipid homeostasis, and induces lipogenic reprogramming of tumor cells. Elevated SREBP1 levels are linked to cancer cell proliferation and metastasis. This review will summarize recent findings to provide a current understanding of lipid regulatory proteins in the ovarian tumor microenvironment with emphasis on SREBP1 expression in the obese host, the role of SREBP1 in cancer progression and metastasis, and potential therapeutic targeting of SREBPs and SREBP-pathway genes in treating cancers, particularly in the context of host obesity.
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154
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Multiple Roles of 25-Hydroxycholesterol in Lipid Metabolism, Antivirus Process, Inflammatory Response, and Cell Survival. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:8893305. [PMID: 33274010 PMCID: PMC7695496 DOI: 10.1155/2020/8893305] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 10/25/2020] [Accepted: 10/26/2020] [Indexed: 02/07/2023]
Abstract
As an essential lipid, cholesterol is of great value in keeping cell homeostasis, being the precursor of bile acid and steroid hormones, and stabilizing membrane lipid rafts. As a kind of cholesterol metabolite produced by enzymatic or radical process, oxysterols have drawn much attention in the last decades. Among which, the role of 25-hydroxycholesterol (25-HC) in cholesterol and bile acid metabolism, antivirus process, and inflammatory response has been largely disclosed. This review is aimed at revealing these functions and underlying mechanisms of 25-HC.
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155
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Sodero AO. 24S-hydroxycholesterol: Cellular effects and variations in brain diseases. J Neurochem 2020; 157:899-918. [PMID: 33118626 DOI: 10.1111/jnc.15228] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/13/2020] [Accepted: 10/17/2020] [Indexed: 12/12/2022]
Abstract
The adult brain exhibits a characteristic cholesterol homeostasis, with low synthesis rate and active catabolism. Brain cholesterol turnover is possible thanks to the action of the enzyme cytochrome P450 46A1 (CYP46A1) or 24-cholesterol hydroxylase, that transforms cholesterol into 24S-hydroxycholesterol (24S-HC). But before crossing the blood-brain barrier (BBB), this oxysterol, that is the most abundant in the brain, can act locally, affecting the functioning of neurons, astrocytes, oligodendrocytes, and vascular cells. The first part of this review addresses different aspects of 24S-HC production and elimination from the brain. The second part concentrates in the effects of 24S-HC at the cellular level, describing how this oxysterol affects cell viability, amyloid β production, neurotransmission, and transcriptional activity. Finally, the role of 24S-HC in Alzheimer, Huntington and Parkinson diseases, multiple sclerosis and amyotrophic lateral sclerosis, as well as the possibility of using this oxysterol as predictive and/or evolution biomarker in different brain disorders is discussed.
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Affiliation(s)
- Alejandro O Sodero
- Institute of Biomedical Research (BIOMED), Pontifical Catholic University of Argentina (UCA) and National Scientific and Technical Research Council (CONICET), Buenos Aires, Argentina
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156
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Götting I, Jendrossek V, Matschke J. A New Twist in Protein Kinase B/Akt Signaling: Role of Altered Cancer Cell Metabolism in Akt-Mediated Therapy Resistance. Int J Mol Sci 2020; 21:ijms21228563. [PMID: 33202866 PMCID: PMC7697684 DOI: 10.3390/ijms21228563] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/23/2020] [Accepted: 11/09/2020] [Indexed: 12/11/2022] Open
Abstract
Cancer resistance to chemotherapy, radiotherapy and molecular-targeted agents is a major obstacle to successful cancer therapy. Herein, aberrant activation of the phosphatidyl-inositol-3-kinase (PI3K)/protein kinase B (Akt) pathway is one of the most frequently deregulated pathways in cancer cells and has been associated with multiple aspects of therapy resistance. These include, for example, survival under stress conditions, apoptosis resistance, activation of the cellular response to DNA damage and repair of radiation-induced or chemotherapy-induced DNA damage, particularly DNA double strand breaks (DSB). One further important, yet not much investigated aspect of Akt-dependent signaling is the regulation of cell metabolism. In fact, many Akt target proteins are part of or involved in the regulation of metabolic pathways. Furthermore, recent studies revealed the importance of certain metabolites for protection against therapy-induced cell stress and the repair of therapy-induced DNA damage. Thus far, the likely interaction between deregulated activation of Akt, altered cancer metabolism and therapy resistance is not yet well understood. The present review describes the documented interactions between Akt, its target proteins and cancer cell metabolism, focusing on antioxidant defense and DSB repair. Furthermore, the review highlights potential connections between deregulated Akt, cancer cell metabolism and therapy resistance of cancer cells through altered DSB repair and discusses potential resulting therapeutic implications.
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157
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Feeding induces cholesterol biosynthesis via the mTORC1-USP20-HMGCR axis. Nature 2020; 588:479-484. [PMID: 33177714 DOI: 10.1038/s41586-020-2928-y] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 08/19/2020] [Indexed: 12/14/2022]
Abstract
Cholesterol is an essential lipid and its synthesis is nutritionally and energetically costly1,2. In mammals, cholesterol biosynthesis increases after feeding and is inhibited under fasting conditions3. However, the regulatory mechanisms of cholesterol biosynthesis at the fasting-feeding transition remain poorly understood. Here we show that the deubiquitylase ubiquitin-specific peptidase 20 (USP20) stabilizes HMG-CoA reductase (HMGCR), the rate-limiting enzyme in the cholesterol biosynthetic pathway, in the feeding state. The post-prandial increase in insulin and glucose concentration stimulates mTORC1 to phosphorylate USP20 at S132 and S134; USP20 is recruited to the HMGCR complex and antagonizes its degradation. The feeding-induced stabilization of HMGCR is abolished in mice with liver-specific Usp20 deletion and in USP20(S132A/S134A) knock-in mice. Genetic deletion or pharmacological inhibition of USP20 markedly decreases diet-induced body weight gain, reduces lipid levels in the serum and liver, improves insulin sensitivity and increases energy expenditure. These metabolic changes are reversed by expression of the constitutively stable HMGCR(K248R). This study reveals an unexpected regulatory axis from mTORC1 to HMGCR via USP20 phosphorylation and suggests that inhibitors of USP20 could be used to lower cholesterol levels to treat metabolic diseases including hyperlipidaemia, liver steatosis, obesity and diabetes.
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158
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Cloherty AP, Olmstead AD, Ribeiro CM, Jean F. Hijacking of Lipid Droplets by Hepatitis C, Dengue and Zika Viruses-From Viral Protein Moonlighting to Extracellular Release. Int J Mol Sci 2020; 21:E7901. [PMID: 33114346 PMCID: PMC7662613 DOI: 10.3390/ijms21217901] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/15/2020] [Accepted: 10/20/2020] [Indexed: 02/06/2023] Open
Abstract
Hijacking and manipulation of host cell biosynthetic pathways by human enveloped viruses are essential for the viral lifecycle. Flaviviridae members, including hepatitis C, dengue and Zika viruses, extensively manipulate host lipid metabolism, underlining the importance of lipid droplets (LDs) in viral infection. LDs are dynamic cytoplasmic organelles that can act as sequestration platforms for a unique subset of host and viral proteins. Transient recruitment and mobilization of proteins to LDs during viral infection impacts host-cell biological properties, LD functionality and canonical protein functions. Notably, recent studies identified LDs in the nucleus and also identified that LDs are transported extracellularly via an autophagy-mediated mechanism, indicating a novel role for autophagy in Flaviviridae infections. These developments underline an unsuspected diversity and localization of LDs and potential moonlighting functions of LD-associated proteins during infection. This review summarizes recent breakthroughs concerning the LD hijacking activities of hepatitis C, dengue and Zika viruses and potential roles of cytoplasmic, nuclear and extracellular LD-associated viral proteins during infection.
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Affiliation(s)
- Alexandra P.M. Cloherty
- Amsterdam UMC, Amsterdam Institute for Infection & Immunity, Department of Experimental Immunology, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands; (A.P.M.C.); (C.M.S.R.)
| | - Andrea D. Olmstead
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, 3559–2350 Health Sciences Mall, Vancouver, BC V6T1Z3, Canada;
| | - Carla M.S. Ribeiro
- Amsterdam UMC, Amsterdam Institute for Infection & Immunity, Department of Experimental Immunology, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands; (A.P.M.C.); (C.M.S.R.)
| | - François Jean
- Department of Microbiology and Immunology, Life Sciences Institute, University of British Columbia, 3559–2350 Health Sciences Mall, Vancouver, BC V6T1Z3, Canada;
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159
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Zhang X, Lin K, Li Y. Highlights to phytosterols accumulation and equilibrium in plants: Biosynthetic pathway and feedback regulation. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 155:637-649. [PMID: 32858426 DOI: 10.1016/j.plaphy.2020.08.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 08/08/2020] [Accepted: 08/08/2020] [Indexed: 05/26/2023]
Abstract
Phytosterols are a group of sterols exclusive to plants and fungi, but are indispensable to humans because of their medicinal and nutritional values. However, current raw materials used for phytosterols extraction add to the cost and waste in the process. For higher sterols production, major attention is drawn to plant materials abundant in phytosterols and genetic modification. To provide an insight into phytosterols metabolism, the research progress on key enzymes involved in phytosterols biosynthesis and conversions were summarized. CAS, SSR2, SMT, DWF1 and CYP710A, the enzymes participating in the biosynthetic pathway, and PSAT, ASAT and SGT, the enzymes involved in the conversion of free sterols to conjugated ones, were reviewed. Specifically, SMT and CYP710A were emphasized for their function on modulating the percentage composition of different kinds of phytosterols. The thresholds of sterol equilibrium and the resultant phytosterols accumulation, which vary in plant species and contribute to plasma membrane remodeling under stresses, were also discussed. By retrospective analysis of the previous researches, we proposed a feedback mechanism regulating sterol equilibrium underlying sterols metabolism. From a strategic perspective, we regard salt tolerant plant as an alternative to present raw materials, which will attain higher phytosterols production in combination with gene-modification.
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Affiliation(s)
- Xuan Zhang
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Kangqi Lin
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Yinxin Li
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
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160
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Jiang T, Zhang G, Lou Z. Role of the Sterol Regulatory Element Binding Protein Pathway in Tumorigenesis. Front Oncol 2020; 10:1788. [PMID: 33014877 PMCID: PMC7506081 DOI: 10.3389/fonc.2020.01788] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Accepted: 08/11/2020] [Indexed: 12/15/2022] Open
Abstract
Metabolic changes are a major feature of tumors, including various metabolic forms, such as energy, lipid, and amino acid metabolism. Sterol regulatory element binding proteins (SREBPs) are important modules in regulating lipid metabolism and play an essential role in metabolic diseases. In the previous decades, the regulatory range of SREBPs has been markedly expanded. It was found that SREBPs also played a critical role in tumor development. SREBPs are involved in energy supply, lipid supply, immune environment and inflammatory environment shaping in tumor cells, and as a protective umbrella to support the malignant proliferation of tumor cells. Natural medicine and traditional Chinese medicine, as an important part of drug therapy, demonstrates the multifaceted effects of SREBPs regulation. This review summarizes the core processes in the involvement of SREBPs in tumors and provides a comprehensive understanding of the pathways through which natural drugs target the SREBP pathway and regulate tumor progression.
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Affiliation(s)
- Tao Jiang
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Guangji Zhang
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhaohuan Lou
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
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161
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Louisse J, Rijkers D, Stoopen G, Janssen A, Staats M, Hoogenboom R, Kersten S, Peijnenburg A. Perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), and perfluorononanoic acid (PFNA) increase triglyceride levels and decrease cholesterogenic gene expression in human HepaRG liver cells. Arch Toxicol 2020; 94:3137-3155. [PMID: 32588087 PMCID: PMC7415755 DOI: 10.1007/s00204-020-02808-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 06/15/2020] [Indexed: 01/09/2023]
Abstract
Per- and polyfluoroalkyl substances (PFASs) are omnipresent in the environment, food chain, and humans. Epidemiological studies have shown a positive association between serum levels of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), and increased serum cholesterol and, in some cases, also triglyceride levels. However, causality has been questioned, as animal studies, as well as a human trial, showed a decrease in serum cholesterol and no effects or a decrease in plasma triglycerides. To obtain more insight into the effects of PFASs on these processes, the present study investigated the effects of PFOA, PFOS, and perfluorononanoic acid (PFNA) on intracellular triglyceride and cholesterol levels in human HepaRG liver cells. DNA microarray analyses were performed to provide insight into underlying mechanisms. All PFASs induced an increase in cellular triglyceride levels, but had no effect on cholesterol levels. Gene set enrichment analysis (GSEA) of the microarray data indicated that gene sets related to cholesterol biosynthesis were repressed by PFOA, PFOS, and PFNA. Other gene sets commonly affected by all PFAS were related to PERK/ATF4 signaling (induced), tRNA amino-acylation (induced), amino acid transport (induced), and glycolysis/gluconeogenesis (repressed). Moreover, numerous target genes of peroxisome proliferator-activated receptor α (PPARα) were found to be upregulated. Altogether, the present study shows that PFOA, PFOS, and PFNA increase triglyceride levels and inhibit cholesterogenic gene expression in HepaRG cells. In addition, the present study indicates that PFASs induce endoplasmic reticulum stress, which may be an important mechanism underlying some of the toxic effects of these chemicals.
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Affiliation(s)
- Jochem Louisse
- Wageningen Food Safety Research (WFSR), Wageningen, The Netherlands.
| | - Deborah Rijkers
- Wageningen Food Safety Research (WFSR), Wageningen, The Netherlands
| | - Geert Stoopen
- Wageningen Food Safety Research (WFSR), Wageningen, The Netherlands
| | - Aafke Janssen
- Wageningen Food Safety Research (WFSR), Wageningen, The Netherlands
| | - Martijn Staats
- Wageningen Food Safety Research (WFSR), Wageningen, The Netherlands
| | - Ron Hoogenboom
- Wageningen Food Safety Research (WFSR), Wageningen, The Netherlands
| | - Sander Kersten
- Nutrition, Metabolism and Genomics Group, Division of Human Nutrition and Health, Wageningen University, Wageningen, The Netherlands
| | - Ad Peijnenburg
- Wageningen Food Safety Research (WFSR), Wageningen, The Netherlands
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162
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Shi HB, Tai DM, Wang C, Liu JX, Loor JJ, Liu HY. Short communication: The antilipogenic effect of trans-10,cis-12 conjugated linoleic acid in bovine mammary epithelial cells is associated with proteasome activity and ATP production. J Dairy Sci 2020; 103:9096-9101. [PMID: 32828501 DOI: 10.3168/jds.2019-17872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 06/01/2020] [Indexed: 01/24/2023]
Abstract
Proteasomes play a widespread role in the control of protein abundance via degrading ubiquitinated proteins. Activity of proteasomes is regulated by constitutive ATPases that respond to intracellular concentrations of ATP. Although recent data suggest a role of proteasomes in fatty acid metabolism, whether lipogenic activity in mammary cells is responsive to ATP concentrations and proteasome activity is unknown. To investigate whether proteasomes play a role in milk fat depression induced by trans-10,cis-12 conjugated linoleic acid (t10,c12 CLA), a bovine mammary epithelial cell line was treated with t10,c12 CLA for 24 h before analysis of lipogenic protein abundance. Western blot analysis of inactive sterol response element-binding protein-1 (pSREBP1) and active (nSREBP1) fragments indicated a decrease in abundance induced by exogenous t10,c12 CLA. At 150 nM t10,c12 CLA, abundance of both pSREBP1 and nSREBP1 was lowest, and decreased from basal levels by 16 and 64%, respectively. Exogenous t10,c12 CLA had no effect on abundance of peroxisome proliferator-activated receptor-gamma (PPARγ), but at 150 and 300 nM it decreased abundance of SREBF chaperone (SCAP). Inhibition of proteasome activity via incubation with MG-132 (a proteasome inhibitor) alone had no effect on pSREBP1, nSREBP1, PPARγ, or SCAP abundance. However, when cells were pre-incubated with MG-132, treatment with t10,c12 CLA reduced pSREBP1 (∼27%) and nSREBP1 (∼41%) abundance without affecting PPARγ or SCAP. Compared with the control, exogenous t10,c12 CLA increased ATP concentrations, and MG-132 alone had no effect. However, ATP concentration decreased markedly in cells incubated with both MG-132 and t10,c12 CLA. Combined with the alteration of SCAP and nSREBP1, the increase of ATP concentrations with t10,c12 CLA suggested that this fatty acid influenced the function of the SREBP1-SCAP complex through altering proteasome activity. Collectively, the current data highlight a role of proteasomes and intracellular ATP concentrations in the antilipogenic effect induced by t10,c12 CLA that leads to milk fat depression.
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Affiliation(s)
- H B Shi
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - D M Tai
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - C Wang
- College of Animal Sciences and Technology, Zhejiang A and F University, Lin'an 311300, China
| | - J X Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - H Y Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
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163
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Martínez-Montañés F, Casanovas A, Sprenger RR, Topolska M, Marshall DL, Moreno-Torres M, Poad BL, Blanksby SJ, Hermansson M, Jensen ON, Ejsing CS. Phosphoproteomic Analysis across the Yeast Life Cycle Reveals Control of Fatty Acyl Chain Length by Phosphorylation of the Fatty Acid Synthase Complex. Cell Rep 2020; 32:108024. [DOI: 10.1016/j.celrep.2020.108024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 05/11/2020] [Accepted: 07/21/2020] [Indexed: 12/12/2022] Open
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164
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Dahik VD, Frisdal E, Le Goff W. Rewiring of Lipid Metabolism in Adipose Tissue Macrophages in Obesity: Impact on Insulin Resistance and Type 2 Diabetes. Int J Mol Sci 2020; 21:ijms21155505. [PMID: 32752107 PMCID: PMC7432680 DOI: 10.3390/ijms21155505] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 07/28/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022] Open
Abstract
Obesity and its two major comorbidities, insulin resistance and type 2 diabetes, represent worldwide health issues whose incidence is predicted to steadily rise in the coming years. Obesity is characterized by an accumulation of fat in metabolic tissues resulting in chronic inflammation. It is now largely accepted that adipose tissue inflammation underlies the etiology of these disorders. Adipose tissue macrophages (ATMs) represent the most enriched immune fraction in hypertrophic, chronically inflamed adipose tissue, and these cells play a key role in diet-induced type 2 diabetes and insulin resistance. ATMs are triggered by the continuous influx of dietary lipids, among other stimuli; however, how these lipids metabolically activate ATM depends on their nature, composition and localization. This review will discuss the fate and molecular programs elicited within obese ATMs by both exogenous and endogenous lipids, as they mediate the inflammatory response and promote or hamper the development of obesity-associated insulin resistance and type 2 diabetes.
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165
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Aweya JJ, Zheng X, Zheng Z, Wang W, Fan J, Yao D, Li S, Zhang Y. The sterol regulatory element binding protein homolog of Penaeus vannamei modulates fatty acid metabolism and immune response. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158757. [PMID: 32544537 DOI: 10.1016/j.bbalip.2020.158757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 06/04/2020] [Accepted: 06/07/2020] [Indexed: 01/28/2023]
Abstract
The sterol regulatory element binding proteins (SREBPs) transcription factors family, which regulate the expression of genes involved in cellular lipid metabolism and homeostasis, have recently been implicated in various physiological and pathophysiological processes such as immune regulation and inflammation in vertebrates. Consistent with other invertebrates, we identified a single SREBP ortholog in Penaeus vannamei (designated PvSREBP) with transcripts ubiquitously expressed in tissues and induced by lipopolysaccharide (LPS), Vibrio parahaemolyticus and Streptococcus iniae. In vivo RNA interference (RNAi) of PvSREBP attenuated the expression of several fatty acid metabolism-related genes (i.e., cyclooxygenase (PvCOX), lipoxygenase (PvLOX), fatty acid binding protein (PvFABP) and fatty acid synthase (PvFASN)), which consequently decreased the levels of total polyunsaturated fatty acids (ΣPUFAs). In addition, PvSREBP silencing decreased transcript levels of several immune-related genes such as hemocyanin (PvHMC) and trypsin (PvTrypsin), as well as genes encoding for heat-shock proteins (i.e., PvHSP60, PvHSP70 and PvHSP90). Moreover, in silico analysis revealed the presence of SREBP binding motifs on the promoters of most of the dysregulated genes, while shrimp depleted of PvSREBP were more susceptible to V. parahaemolyticus infection. Collectively, we demonstrated the involvement of shrimp SREBP in fatty acids metabolism and immune response, and propose that PvSREBP and PvHMC modulate each other through a feedback mechanism to establish homeostasis. The current study is the first to show the dual role of SREBP in fatty acid metabolism and immune response in invertebrates and crustaceans.
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Affiliation(s)
- Jude Juventus Aweya
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China; STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China
| | - Xiaoyu Zheng
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China; STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China
| | - Zhihong Zheng
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China; STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China
| | - Wei Wang
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China; STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China
| | - Jiaohong Fan
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China; STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China
| | - Defu Yao
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China; STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China
| | - Shengkang Li
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China; STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China
| | - Yueling Zhang
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China; STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China.
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166
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Ye J. Transcription factors activated through RIP (regulated intramembrane proteolysis) and RAT (regulated alternative translocation). J Biol Chem 2020; 295:10271-10280. [PMID: 32487748 DOI: 10.1074/jbc.rev120.012669] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 05/26/2020] [Indexed: 12/21/2022] Open
Abstract
Transmembrane proteins are membrane-anchored proteins whose topologies are important for their functions. These properties enable regulation of certain transmembrane proteins by regulated intramembrane proteolysis (RIP) and regulated alternative translocation (RAT). RIP enables a protein fragment of a transmembrane precursor to function at a new location, and RAT leads to an inverted topology of a transmembrane protein by altering the direction of its translocation across membranes during translation. RIP mediated by site-1 protease (S1P) and site-2 protease (S2P) is involved in proteolytic activation of membrane-bound transcription factors. In resting cells, these transcription factors remain in the endoplasmic reticulum (ER) as inactive transmembrane precursors. Upon stimulation by signals within the ER, they are translocated from the ER to the Golgi. There, they are cleaved first by S1P and then by S2P, liberating their N-terminal domains from membranes and enabling them to activate genes in the nucleus. This signaling pathway regulates lipid metabolism, unfolded protein responses, secretion of extracellular matrix proteins, and cell proliferation. Remarkably, ceramide-induced RIP of cAMP response element-binding protein 3-like 1 (CREB3L1) also involves RAT. In resting cells, RIP of CREB3L1 is blocked by transmembrane 4 L6 family member 20 (TM4SF20). Ceramide inverts the orientation of newly synthesized TM4SF20 in membranes through RAT, converting TM4SF20 from an inhibitor to an activator of RIP of CREB3L1. Here, I review recent insights into RIP of membrane-bound transcription factors, focusing on CREB3L1 activation through both RIP and RAT, and discuss current open questions about these two signaling pathways.
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Affiliation(s)
- Jin Ye
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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167
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The cellular function of SCAP in metabolic signaling. Exp Mol Med 2020; 52:724-729. [PMID: 32385422 PMCID: PMC7272406 DOI: 10.1038/s12276-020-0430-0] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 03/26/2020] [Accepted: 03/31/2020] [Indexed: 12/16/2022] Open
Abstract
Sterol regulatory element binding protein (SREBP) cleavage activating protein (SCAP) is a key regulator of SREBP maturation. SCAP induces translocation of SREBP from the endoplasmic reticulum to the Golgi apparatus, allowing it to regulate cellular triglyceride and cholesterol levels. Previous studies have shown that suppression of SREBP activation in SCAP conditional knockout mice reduced the accumulation of intracellular triglycerides, which eventually causes the development of metabolic diseases such as atherosclerosis, diabetes, hepatic steatosis, and insulin resistance. However, despite the significance of SCAP as a regulator of SREBP, its function has not been thoroughly discussed. In this review, we have summarized the function of SCAP and its regulatory proteins. Furthermore, we discuss recent studies regarding SCAP as a possible therapeutic target for hypertriglyceridemia and hyperlipidemia.
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168
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Pleiotropic effects of statins on brain cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183340. [PMID: 32387399 DOI: 10.1016/j.bbamem.2020.183340] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/01/2020] [Accepted: 05/01/2020] [Indexed: 01/06/2023]
Abstract
Starting with cholesterol homeostasis, the first part of the review addresses various aspects of cholesterol metabolism in neuronal and glial cells and the mutual crosstalk between the two cell types, particularly the transport of cholesterol from its site of synthesis to its target loci in neuronal cells, discussing the multiple mechanistic aspects and transporter systems involved. Statins are next analyzed from the point of view of their chemical structure and its impingement on their pharmacological properties and permeability through cell membranes and the blood-brain barrier in particular. The following section then discusses the transcriptional effects of statins and the changes they induce in brain cell genes associated with a variety of processes, including cell growth, signaling and trafficking, uptake and synthesis of cholesterol. We review the effects of statins at the cellular level, analyzing their impact on the cholesterol composition of the nerve and glial cell plasmalemma, neurotransmitter receptor mobilization, myelination, dendritic arborization of neurons, synaptic vesicle release, and cell viability. Finally, the role of statins in disease is exemplified by Alzheimer and Parkinson diseases and some forms of epilepsy, both in animal models and in the human form of these pathologies.
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Li MX, Yang Y, Zhao Q, Wu Y, Song L, Yang H, He M, Gao H, Song BL, Luo J, Rao Y. Degradation versus Inhibition: Development of Proteolysis-Targeting Chimeras for Overcoming Statin-Induced Compensatory Upregulation of 3-Hydroxy-3-methylglutaryl Coenzyme A Reductase. J Med Chem 2020; 63:4908-4928. [DOI: 10.1021/acs.jmedchem.0c00339] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Mei-Xin Li
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Yiqing Yang
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, P.R. China
| | - Qiuye Zhao
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, P.R. China
| | - Yue Wu
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, P.R. China
| | - Lei Song
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences PHOENIX Center, Beijing Institute of LifeOmics, Beijing 102206, P.R. China
| | - Haiyan Yang
- School of Life Sciences, Tsinghua University, Beijing 100084, P.R. China
| | - Ming He
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, P.R. China
| | - Hongying Gao
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, P.R. China
| | - Bao-Liang Song
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Jie Luo
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Yu Rao
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, P.R. China
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170
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Liu S, Huang J, Wang X, Ma Y. Transcription factors regulate adipocyte differentiation in beef cattle. Anim Genet 2020; 51:351-357. [PMID: 32253788 DOI: 10.1111/age.12931] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2020] [Indexed: 12/13/2022]
Abstract
Intramuscular fat (IMF) content is a critical factor affecting meat flavor, juiciness, tenderness, and color. Therefore, the improvement of IMF content is one of the hotspots of animal science research. Fat deposition is the result of a combination of increased number of fat cells and cellular hypertrophy. In addition, transcription factors can influence the number of adipocytes and regulate lipid metabolism. The progress of the transcription factors regulating adipocyte differentiation in beef cattle, including IMF cell sources, and promoting or inhibiting adipogenic differentiation of transcription factors is reviewed in this paper.
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Affiliation(s)
- S Liu
- School of Agriculture, Ningxia University, Helan Mountain West Road 489, 750021, Yin Chuan, Ningxia Hui Autonomous Region, China
| | - J Huang
- College of Life Sciences, Xinyang Normal University, Nanhu Road 237, 464000, Xinyang, Henan Province, China
| | - X Wang
- School of Agriculture, Ningxia University, Helan Mountain West Road 489, 750021, Yin Chuan, Ningxia Hui Autonomous Region, China
| | - Y Ma
- School of Agriculture, Ningxia University, Helan Mountain West Road 489, 750021, Yin Chuan, Ningxia Hui Autonomous Region, China.,College of Life Sciences, Xinyang Normal University, Nanhu Road 237, 464000, Xinyang, Henan Province, China
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171
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Wandrer F, Liebig S, Marhenke S, Vogel A, John K, Manns MP, Teufel A, Itzel T, Longerich T, Maier O, Fischer R, Kontermann RE, Pfizenmaier K, Schulze-Osthoff K, Bantel H. TNF-Receptor-1 inhibition reduces liver steatosis, hepatocellular injury and fibrosis in NAFLD mice. Cell Death Dis 2020; 11:212. [PMID: 32235829 PMCID: PMC7109108 DOI: 10.1038/s41419-020-2411-6] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/06/2020] [Accepted: 02/06/2020] [Indexed: 12/12/2022]
Abstract
Non-alcoholic fatty liver disease (NAFLD) shows an increasing prevalence and is associated with the development of liver fibrosis and cirrhosis as the major risk factors of liver-related mortality in this disease. The therapeutic possibilities are limited and restricted to life style intervention, since specific drugs for NAFLD are unavailable so far. TNFα has been implicated as a major pathogenic driver of NAFLD. TNFα-mediated liver injury occurs mainly via TNF-receptor-1 (TNFR1) signaling, whereas TNFR2 mediates protective pathways. In this study, we analyzed the therapeutic effects of a novel antibody, which selectively inhibits TNFR1 while retaining protective TNFR2 signaling in a high-fat diet (HFD) mouse model of NAFLD. Mice were fed with HFD for 32 weeks and treated with anti-TNFR1-antibody or control-antibody for the last 8 weeks. We then investigated the mechanisms of TNFR1 inhibition on liver steatosis, inflammatory liver injury, insulin resistance and fibrosis. Compared to control-antibody treatment, TNFR1 inhibition significantly reduced liver steatosis and triglyceride content, which was accompanied by reduced expression and activation of the transcription factor SREBP1 and downstream target genes of lipogenesis. Furthermore, inhibition of TNFR1 resulted in reduced activation of the MAP kinase MKK7 and its downstream target JNK, which was associated with significant improvement of insulin resistance. Apoptotic liver injury, NAFLD activity and alanine aminotransferase (ALT) levels, as well as liver fibrosis significantly decreased by anti-TNFR1 compared to control-antibody treatment. Thus, our results suggest selective TNFR1 inhibition as a promising approach for NAFLD treatment.
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Affiliation(s)
- Franziska Wandrer
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Stephanie Liebig
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Silke Marhenke
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Arndt Vogel
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Katharina John
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Michael P Manns
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
| | - Andreas Teufel
- Department of Medicine II, Division of Hepatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Timo Itzel
- Department of Medicine II, Division of Hepatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Thomas Longerich
- Institute of Pathology, University of Heidelberg, Heidelberg, Germany
| | - Olaf Maier
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Roman Fischer
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Roland E Kontermann
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Klaus Pfizenmaier
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Klaus Schulze-Osthoff
- Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany.,German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Heike Bantel
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany.
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172
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Kaymak I, Maier CR, Schmitz W, Campbell AD, Dankworth B, Ade CP, Walz S, Paauwe M, Kalogirou C, Marouf H, Rosenfeldt MT, Gay DM, McGregor GH, Sansom OJ, Schulze A. Mevalonate Pathway Provides Ubiquinone to Maintain Pyrimidine Synthesis and Survival in p53-Deficient Cancer Cells Exposed to Metabolic Stress. Cancer Res 2020; 80:189-203. [PMID: 31744820 DOI: 10.1158/0008-5472.can-19-0650] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 10/01/2019] [Accepted: 11/14/2019] [Indexed: 11/16/2022]
Abstract
Oncogene activation and loss of tumor suppressor function changes the metabolic activity of cancer cells to drive unrestricted proliferation. Moreover, cancer cells adapt their metabolism to sustain growth and survival when access to oxygen and nutrients is restricted, such as in poorly vascularized tumor areas. We show here that p53-deficient colon cancer cells exposed to tumor-like metabolic stress in spheroid culture activated the mevalonate pathway to promote the synthesis of ubiquinone. This was essential to maintain mitochondrial electron transport for respiration and pyrimidine synthesis in metabolically compromised environments. Induction of mevalonate pathway enzyme expression in the absence of p53 was mediated by accumulation and stabilization of mature SREBP2. Mevalonate pathway inhibition by statins blocked pyrimidine nucleotide biosynthesis and induced oxidative stress and apoptosis in p53-deficient cancer cells in spheroid culture. Moreover, ubiquinone produced by the mevalonate pathway was essential for the growth of p53-deficient tumor organoids. In contrast, inhibition of intestinal hyperproliferation by statins in an Apc/KrasG12D-mutant mouse model was independent of de novo pyrimidine synthesis. Our results highlight the importance of the mevalonate pathway for maintaining mitochondrial electron transfer and biosynthetic activity in cancer cells exposed to metabolic stress. They also demonstrate that the metabolic output of this pathway depends on both genetic and environmental context. SIGNIFICANCE: These findings suggest that p53-deficient cancer cells activate the mevalonate pathway via SREBP2 and promote the synthesis of ubiquinone that plays an essential role in reducing oxidative stress and supports the synthesis of pyrimidine nucleotide.
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Affiliation(s)
- Irem Kaymak
- Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
| | | | | | | | | | - Carsten P Ade
- Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
| | - Susanne Walz
- Comprehensive Cancer Center Mainfranken, Core Unit Bioinformatics, Biocenter, University of Würzburg, Würzburg, Germany
| | - Madelon Paauwe
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
| | - Charis Kalogirou
- Department of Urology, University Hospital Würzburg, Würzburg, Germany
| | - Hecham Marouf
- Theodor-Boveri-Institute, Biocenter, Würzburg, Germany
| | - Mathias T Rosenfeldt
- Department of Pathology, University Hospital Würzburg, Würzburg, Germany
- Comprehensive Cancer Center Mainfranken, Würzburg, Germany
| | - David M Gay
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
- Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Grace H McGregor
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
- Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Owen J Sansom
- Cancer Research UK Beatson Institute, Glasgow, United Kingdom
| | - Almut Schulze
- Theodor-Boveri-Institute, Biocenter, Würzburg, Germany.
- Comprehensive Cancer Center Mainfranken, Würzburg, Germany
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173
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The impact of PSRC1 overexpression on gene and transcript expression profiling in the livers of ApoE -/- mice fed a high-fat diet. Mol Cell Biochem 2019; 465:125-139. [PMID: 31838625 DOI: 10.1007/s11010-019-03673-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 12/03/2019] [Indexed: 01/16/2023]
Abstract
Our previous studies have confirmed that proline/serine-rich coiled-coil 1 (PSRC1) overexpression can regulate blood lipid levels and inhibit atherosclerosis (AS) development. In the current study, the gene and transcript expression profiles in the livers of ApoE-/- mice overexpressing PSRC1 were investigated. HiSeq X Ten RNA sequencing (RNA-seq) analysis was used to examine the differentially expressed genes (DEGs) and differentially expressed transcripts in the livers of PSRC1-overexpressing ApoE-/- and control mice. Then, Gene Ontology (GO) functional enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were performed on these DEGs and on long noncoding RNA (lncRNA) predicted target genes. A total of 1892 significant DEGs were identified: 1431 were upregulated (e.g., Cyp2a4, Obp2a, and Sertad4), and 461 were downregulated (e.g., Moxd1, Egr1, and Elovl3). In addition, 8184 significant differentially expressed transcripts were identified, 4908 of which were upregulated and 3276 of which were downregulated. Furthermore, 1106 significant differentially expressed lncRNAs were detected, 713 of which were upregulated and 393 of which were downregulated. Quantitative reverse transcription PCR (qRT-PCR) verified changes in 10 randomly selected DEGs. GO analyses showed that the DEGs and predicted lncRNA target genes were mostly enriched for actin binding and lipid metabolism. KEGG biological pathway analyses showed that the DEGs in the livers of PSRC1-overexpressing ApoE-/- mice were enriched in the mitogen-activated protein kinase (MAPK) pathway. These findings reveal that PSRC1 may affect liver actin polymerization and cholesterol metabolism-related genes or pathways. These mRNAs and lncRNAs may represent new biomarkers and targets for the diagnosis and therapy of lipid metabolism disturbance and AS.
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174
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The impact of dyslipidemia and oxidative stress on vasoactive mediators in patients with renal dysfunction. Int Urol Nephrol 2019; 51:2235-2242. [DOI: 10.1007/s11255-019-02319-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 10/11/2019] [Indexed: 12/27/2022]
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175
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Dong Q, Majumdar G, O’Meally RN, Cole RN, Elam MB, Raghow R. Insulin-induced de novo lipid synthesis occurs mainly via mTOR-dependent regulation of proteostasis of SREBP-1c. Mol Cell Biochem 2019; 463:13-31. [DOI: 10.1007/s11010-019-03625-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 09/04/2019] [Indexed: 12/29/2022]
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176
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Chen L, Ma MY, Sun M, Jiang LY, Zhao XT, Fang XX, Man Lam S, Shui GH, Luo J, Shi XJ, Song BL. Endogenous sterol intermediates of the mevalonate pathway regulate HMGCR degradation and SREBP-2 processing. J Lipid Res 2019; 60:1765-1775. [PMID: 31455613 DOI: 10.1194/jlr.ra119000201] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/21/2019] [Indexed: 11/20/2022] Open
Abstract
Sterol-regulated HMG-CoA reductase (HMGCR) degradation and SREBP-2 cleavage are two major feedback regulatory mechanisms governing cholesterol biosynthesis. Reportedly, lanosterol selectively stimulates HMGCR degradation, and cholesterol is a specific regulator of SREBP-2 cleavage. However, it is unclear whether other endogenously generated sterols regulate these events. Here, we investigated the sterol intermediates from the mevalonate pathway of cholesterol biosynthesis using a CRISPR/Cas9-mediated genetic engineering approach. With a constructed HeLa cell line expressing the mevalonate transporter, we individually deleted genes encoding major enzymes in the mevalonate pathway, used lipidomics to measure sterol intermediates, and examined HMGCR and SREBP-2 statuses. We found that the C4-dimethylated sterol intermediates, including lanosterol, 24,25-dihydrolanosterol, follicular fluid meiosis activating sterol, testis meiosis activating sterol, and dihydro-testis meiosis activating sterol, were significantly upregulated upon mevalonate loading. These intermediates augmented both degradation of HMGCR and inhibition of SREBP-2 cleavage. The accumulated lanosterol induced rapid degradation of HMGCR, but did not inhibit SREBP-2 cleavage. The newly synthesized cholesterol from the mevalonate pathway is dispensable for inhibiting SREBP-2 cleavage. Together, these results suggest that lanosterol is a bona fide endogenous regulator that specifically promotes HMGCR degradation, and that other C4-dimethylated sterol intermediates may regulate both HMGCR degradation and SREBP-2 cleavage.
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Affiliation(s)
- Liang Chen
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Mei-Yan Ma
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Ming Sun
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Lu-Yi Jiang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Xue-Tong Zhao
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Xian-Xiu Fang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Sin Man Lam
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology , Chinese Academy of Sciences, Beijing 100101, China
| | - Guang-Hou Shui
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology , Chinese Academy of Sciences, Beijing 100101, China
| | - Jie Luo
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Xiong-Jie Shi
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Bao-Liang Song
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
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177
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Raghow R, Dong Q, Elam MB. Phosphorylation dependent proteostasis of sterol regulatory element binding proteins. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1145-1156. [DOI: 10.1016/j.bbalip.2019.04.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/19/2019] [Accepted: 04/28/2019] [Indexed: 12/17/2022]
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178
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Silva-Marrero JI, Villasante J, Rashidpour A, Palma M, Fàbregas A, Almajano MP, Viegas I, Jones JG, Miñarro M, Ticó JR, Baanante IV, Metón I. The Administration of Chitosan-Tripolyphosphate-DNA Nanoparticles to Express Exogenous SREBP1a Enhances Conversion of Dietary Carbohydrates into Lipids in the Liver of Sparus aurata. Biomolecules 2019; 9:biom9080297. [PMID: 31344838 PMCID: PMC6724022 DOI: 10.3390/biom9080297] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 07/16/2019] [Accepted: 07/19/2019] [Indexed: 12/12/2022] Open
Abstract
In addition to being essential for the transcription of genes involved in cellular lipogenesis, increasing evidence associates sterol regulatory element binding proteins (SREBPs) with the transcriptional control of carbohydrate metabolism. The aim of this study was to assess the effect of overexpression SREBP1a, a potent activator of all SREBP-responsive genes, on the intermediary metabolism of Sparus aurata, a glucose-intolerant carnivorous fish. Administration of chitosan-tripolyphosphate nanoparticles complexed with a plasmid driving expression of the N-terminal transactivation domain of SREBP1a significantly increased SREBP1a mRNA and protein in the liver of S. aurata. Overexpression of SREBP1a enhanced the hepatic expression of key genes in glycolysis-gluconeogenesis (glucokinase and 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase), fatty acid synthesis (acetyl-CoA carboxylase 1 and acetyl-CoA carboxylase 2), elongation (elongation of very long chain fatty acids protein 5) and desaturation (fatty acid desaturase 2) as well as reduced nicotinamide adenine dinucleotide phosphate production (glucose-6-phosphate 1-dehydrogenase) and cholesterol synthesis (3-hydroxy-3-methylglutaryl-coenzyme A reductase), leading to increased blood triglycerides and cholesterol levels. Beyond reporting the first study addressing in vivo effects of exogenous SREBP1a in a glucose-intolerant model, our findings support that SREBP1a overexpression caused multigenic effects that favoured hepatic glycolysis and lipogenesis and thus enabled protein sparing by improving dietary carbohydrate conversion into fatty acids and cholesterol.
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Affiliation(s)
- Jonás I Silva-Marrero
- Secció de Bioquímica i Biologia Molecular, Departament de Bioquímica i Fisiologia, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Juliana Villasante
- Secció de Bioquímica i Biologia Molecular, Departament de Bioquímica i Fisiologia, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain
- Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain
| | - Ania Rashidpour
- Secció de Bioquímica i Biologia Molecular, Departament de Bioquímica i Fisiologia, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Mariana Palma
- Center for Functional Ecology (CFE), Department Life Sciences, University of Coimbra, Calçada Martins de Freitas, 3000-456 Coimbra, Portugal
| | - Anna Fàbregas
- Departament de Farmàcia i Tecnologia Farmacèutica, i Fisicoquímica, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain
| | - María Pilar Almajano
- Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain
| | - Ivan Viegas
- Center for Functional Ecology (CFE), Department Life Sciences, University of Coimbra, Calçada Martins de Freitas, 3000-456 Coimbra, Portugal
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal
| | - John G Jones
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal
| | - Montserrat Miñarro
- Departament de Farmàcia i Tecnologia Farmacèutica, i Fisicoquímica, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Josep R Ticó
- Departament de Farmàcia i Tecnologia Farmacèutica, i Fisicoquímica, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Isabel V Baanante
- Secció de Bioquímica i Biologia Molecular, Departament de Bioquímica i Fisiologia, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Isidoro Metón
- Secció de Bioquímica i Biologia Molecular, Departament de Bioquímica i Fisiologia, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain.
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179
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Kusnadi A, Park SH, Yuan R, Pannellini T, Giannopoulou E, Oliver D, Lu T, Park-Min KH, Ivashkiv LB. The Cytokine TNF Promotes Transcription Factor SREBP Activity and Binding to Inflammatory Genes to Activate Macrophages and Limit Tissue Repair. Immunity 2019; 51:241-257.e9. [PMID: 31303399 DOI: 10.1016/j.immuni.2019.06.005] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 04/23/2019] [Accepted: 06/07/2019] [Indexed: 12/20/2022]
Abstract
Cytokine tumor necrosis factor (TNF)-mediated macrophage polarization is important for inflammatory disease pathogenesis, but the mechanisms regulating polarization are not clear. We performed transcriptomic and epigenomic analysis of the TNF response in primary human macrophages and revealed late-phase activation of SREBP2, the master regulator of cholesterol biosynthesis genes. TNF stimulation extended the genomic profile of SREBP2 occupancy to include binding to and activation of inflammatory and interferon response genes independently of its functions in sterol metabolism. Genetic ablation of SREBP function shifted the balance of macrophage polarization from an inflammatory to a reparative phenotype in peritonitis and skin wound healing models. Genetic ablation of SREBP activity in myeloid cells or topical pharmacological inhibition of SREBP improved skin wound healing under homeostatic and chronic inflammatory conditions. Our results identify a function and mechanism of action for SREBPs in augmenting TNF-induced macrophage activation and inflammation and open therapeutic avenues for promoting wound repair.
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Affiliation(s)
- Anthony Kusnadi
- Immunology and Microbial Pathogenesis Program, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065, USA; Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA
| | - Sung Ho Park
- Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA; School of Life Sciences, Ulsan National Institute of Science & Technology (UNIST), Ulsan 44919, Korea
| | - Ruoxi Yuan
- Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA
| | - Tania Pannellini
- Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA
| | - Eugenia Giannopoulou
- Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA; Biological Sciences Department, New York City College of Technology, City University of New York, Brooklyn, NY 11201, USA
| | - David Oliver
- Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA
| | - Theresa Lu
- Immunology and Microbial Pathogenesis Program, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065, USA; Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA
| | - Kyung-Hyun Park-Min
- BCMB Allied Program, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065, USA; Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA.
| | - Lionel B Ivashkiv
- Immunology and Microbial Pathogenesis Program, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065, USA; Research Institute and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY 10021, USA.
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180
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Bala Bhaskara Rao K, Katragunta K, Sarma UM, Jain N. Abundance of
d
‐2‐hydroxyglutarate in G2/M is determined by FOXM1 in mutant IDH1‐expressing cells. FEBS Lett 2019; 593:2177-2193. [DOI: 10.1002/1873-3468.13500] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/22/2019] [Accepted: 06/07/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Kancharana Bala Bhaskara Rao
- Department of Applied Biology CSIR‐Indian Institute of Chemical Technology Hyderabad India
- Academy of Scientific and Innovative Research (AcSIR) New Delhi India
| | - Kumar Katragunta
- Organic Synthesis and Process Chemistry CSIR‐Indian Institute of Chemical Technology Hyderabad India
| | - Uma Maheswara Sarma
- Organic Synthesis and Process Chemistry CSIR‐Indian Institute of Chemical Technology Hyderabad India
| | - Nishant Jain
- Department of Applied Biology CSIR‐Indian Institute of Chemical Technology Hyderabad India
- Academy of Scientific and Innovative Research (AcSIR) New Delhi India
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181
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Forcina GC, Dixon SJ. GPX4 at the Crossroads of Lipid Homeostasis and Ferroptosis. Proteomics 2019; 19:e1800311. [PMID: 30888116 DOI: 10.1002/pmic.201800311] [Citation(s) in RCA: 467] [Impact Index Per Article: 93.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/27/2019] [Indexed: 12/16/2022]
Abstract
Oxygen is necessary for aerobic metabolism but can cause the harmful oxidation of lipids and other macromolecules. Oxidation of cholesterol and phospholipids containing polyunsaturated fatty acyl chains can lead to lipid peroxidation, membrane damage, and cell death. Lipid hydroperoxides are key intermediates in the process of lipid peroxidation. The lipid hydroperoxidase glutathione peroxidase 4 (GPX4) converts lipid hydroperoxides to lipid alcohols, and this process prevents the iron (Fe2+ )-dependent formation of toxic lipid reactive oxygen species (ROS). Inhibition of GPX4 function leads to lipid peroxidation and can result in the induction of ferroptosis, an iron-dependent, non-apoptotic form of cell death. This review describes the formation of reactive lipid species, the function of GPX4 in preventing oxidative lipid damage, and the link between GPX4 dysfunction, lipid oxidation, and the induction of ferroptosis.
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Affiliation(s)
| | - Scott J Dixon
- Department of Biology, Stanford University, Stanford, CA, 94305, USA
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182
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Chen H, Li Z, Dong L, Wu Y, Shen H, Chen Z. Lipid metabolism in chronic obstructive pulmonary disease. Int J Chron Obstruct Pulmon Dis 2019; 14:1009-1018. [PMID: 31190786 PMCID: PMC6524761 DOI: 10.2147/copd.s196210] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 03/19/2019] [Indexed: 12/18/2022] Open
Abstract
Dysregulated lipid metabolism plays crucial roles in various diseases, including diabetes mellitus, cancer, and neurodegeneration. Recent studies suggest that alterations in major lipid metabolic pathways contribute to pathogenesis of lung diseases, including chronic obstructive pulmonary disease (COPD). These changes allow lung tissue to meet the energy needs and trigger anabolic pathways that initiate the synthesis of active molecules directly involved in the inflammation. In this review, we summarize the changes of catabolism and anabolism of lipids, lipid molecules including lipid mediators, lipid synthesis transcription factors, cholesterol, and phospholipids, and how those lipid molecules participate in the initiation and resolution of inflammation in COPD.
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Affiliation(s)
- Haipin Chen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Institute of Respiratory Diseases, Hangzhou, Zhejiang, People's Republic of China
| | - Zhouyang Li
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Institute of Respiratory Diseases, Hangzhou, Zhejiang, People's Republic of China
| | - Lingling Dong
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Institute of Respiratory Diseases, Hangzhou, Zhejiang, People's Republic of China
| | - Yinfang Wu
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Institute of Respiratory Diseases, Hangzhou, Zhejiang, People's Republic of China
| | - Huahao Shen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Institute of Respiratory Diseases, Hangzhou, Zhejiang, People's Republic of China.,State Key Lab of Respiratory Disease, Guangzhou, Guangdong, People's Republic of China
| | - Zhihua Chen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Institute of Respiratory Diseases, Hangzhou, Zhejiang, People's Republic of China
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183
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Zhu Q, Huang C, Meng X, Li J. CYP1A2 contributes to alcohol-induced abnormal lipid metabolism through the PTEN/AKT/SREBP-1c pathway. Biochem Biophys Res Commun 2019; 513:509-514. [DOI: 10.1016/j.bbrc.2019.04.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 04/03/2019] [Indexed: 12/20/2022]
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184
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Campbell SL, Wellen KE. Metabolic Signaling to the Nucleus in Cancer. Mol Cell 2019; 71:398-408. [PMID: 30075141 DOI: 10.1016/j.molcel.2018.07.015] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/06/2018] [Accepted: 07/13/2018] [Indexed: 12/14/2022]
Abstract
Nutrient-sensing mechanisms ensure that cellular activities are coordinated with nutrient availability. Recent work has established links between metabolite pools and protein post-translational modifications, as metabolites are substrates of enzymes that add or remove modifications such as acetylation, methylation, and glycosylation. Cancer cells undergo metabolic reprogramming and exhibit metabolic plasticity that allows them to survive and proliferate within the tumor microenvironment. In this article we review the evidence that, in cancer cells, nutrient availability and oncogenic metabolic reprogramming impact the abundance of key metabolites that regulate signaling and epigenetics. We propose models to explain how these metabolites may control locus-specific chromatin modification and gene expression. Finally, we discuss emerging roles of metabolites in regulating malignant phenotypes and tumorigenesis via transcriptional control. An improved understanding of how metabolic alterations in cancer affect nuclear gene regulation could uncover new vulnerabilities to target therapeutically.
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Affiliation(s)
- Sydney L Campbell
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Kathryn E Wellen
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
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185
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Shi W, Hou T, Guo D, He H. Evaluation of hypolipidemic peptide (Val-Phe-Val-Arg-Asn) virtual screened from chickpea peptides by pharmacophore model in high-fat diet-induced obese rat. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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186
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Pollinger J, Gellrich L, Schierle S, Kilu W, Schmidt J, Kalinowsky L, Ohrndorf J, Kaiser A, Heering J, Proschak E, Merk D. Tuning Nuclear Receptor Selectivity of Wy14,643 towards Selective Retinoid X Receptor Modulation. J Med Chem 2019; 62:2112-2126. [PMID: 30702885 DOI: 10.1021/acs.jmedchem.8b01848] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The fatty acid sensing nuclear receptor families retinoid X receptors (RXRs) and peroxisome proliferator-activated receptors (PPARs) hold therapeutic potential in neurodegeneration. Valuable pleiotropic activities of Wy14,643 in models of such conditions exceed its known PPAR agonistic profile. Here, we characterize the compound as an RXR agonist explaining the pleiotropic effects and report its systematic structure-activity relationship analysis with the discovery of specific molecular determinants driving activity on PPARs and RXRs. We have designed close analogues of the drug comprising selective and dual agonism on RXRs and PPARs that may serve as superior pharmacological tools to study the role and interplay of the nuclear receptors in various pathologies. A systematically optimized high potency RXR agonist revealed activity in vivo and active concentrations in brain. With its lack of RXR/liver X receptor-mediated side effects and superior profile compared to classical rexinoids, it establishes a new class of innovative RXR modulators to overcome key challenges in RXR targeting drug discovery.
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Affiliation(s)
- Julius Pollinger
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Leonie Gellrich
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Simone Schierle
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Whitney Kilu
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Jurema Schmidt
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Lena Kalinowsky
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Julia Ohrndorf
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Astrid Kaiser
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Jan Heering
- Project Group Translational Medicine and Pharmacology TMP , Fraunhofer IME , Theodor-Stern-Kai 7 , D-60596 Frankfurt , Germany
| | - Ewgenij Proschak
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
| | - Daniel Merk
- Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany
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187
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Lange PT, Lagunoff M, Tarakanova VL. Chewing the Fat: The Conserved Ability of DNA Viruses to Hijack Cellular Lipid Metabolism. Viruses 2019; 11:E119. [PMID: 30699959 PMCID: PMC6409581 DOI: 10.3390/v11020119] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 01/25/2019] [Accepted: 01/26/2019] [Indexed: 12/19/2022] Open
Abstract
Viruses manipulate numerous host factors and cellular pathways to facilitate the replication of viral genomes and the production of infectious progeny. One way in which viruses interact with cells is through the utilization and exploitation of the host lipid metabolism. While it is likely that most-if not all-viruses require lipids or intermediates of lipid synthesis to replicate, many viruses also actively induce lipid metabolic pathways to sustain a favorable replication environment. From the formation of membranous replication compartments, to the generation of ATP or protein modifications, viruses exhibit differing requirements for host lipids. Thus, while the exploitation of lipid metabolism is a common replication strategy, diverse viruses employ a plethora of mechanisms to co-opt these critical cellular pathways. Here, we review recent literature regarding the exploitation of host lipids and lipid metabolism specifically by DNA viruses. Importantly, furthering the understanding of the viral requirements for host lipids may offer new targets for antiviral therapeutics and provide opportunities to repurpose the numerous FDA-approved compounds targeting lipid metabolic pathways as antiviral agents.
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Affiliation(s)
- Philip T Lange
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Michael Lagunoff
- Department of Microbiology, University of Washington, Seattle, WA 98101, USA.
- Molecular and Cellular Biology Program, University of Washington, Seattle, WA 98101, USA.
| | - Vera L Tarakanova
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
- Cancer Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
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188
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Li X, Liu M, Ji JY. Understanding Obesity as a Risk Factor for Uterine Tumors Using Drosophila. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1167:129-155. [PMID: 31520353 DOI: 10.1007/978-3-030-23629-8_8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Multiple large-scale epidemiological studies have identified obesity as an important risk factor for a variety of human cancers, particularly cancers of the uterus, gallbladder, kidney, liver, colon, and ovary, but there is much uncertainty regarding how obesity increases the cancer risks. Given that obesity has been consistently identified as a major risk factor for uterine tumors, the most common malignancies of the female reproductive system, we use uterine tumors as a pathological context to survey the relevant literature and propose a novel hypothesis: chronic downregulation of the cyclin-dependent kinase 8 (CDK8) module, composed of CDK8 (or its paralog CDK19), Cyclin C, MED12 (or MED12L), and MED13 (or MED13L), by elevated insulin or insulin-like growth factor signaling in obese women may increase the chances to dysregulate the activities of transcription factors regulated by the CDK8 module, thereby increasing the risk of uterine tumors. Although we focus on endometrial cancer and uterine leiomyomas (or fibroids), two major forms of uterine tumors, our model may offer additional insights into how obesity increases the risk of other types of cancers and diseases. To illustrate the power of model organisms for studying human diseases, here we place more emphasis on the findings obtained from Drosophila melanogaster.
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Affiliation(s)
- Xiao Li
- Department of Molecular and Cellular Medicine, College of Medicine, Texas A&M University Health Science Center, Bryan, TX, USA
| | - Mengmeng Liu
- Department of Molecular and Cellular Medicine, College of Medicine, Texas A&M University Health Science Center, Bryan, TX, USA
| | - Jun-Yuan Ji
- Department of Molecular and Cellular Medicine, College of Medicine, Texas A&M University Health Science Center, Bryan, TX, USA.
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189
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Suguro R, Chen S, Yang D, Yang Z, Miao L, Wu W, Zeng W, Liu X, Zhu YZ. Anti-hypercholesterolemic Effects and a Good Safety Profile of SCM-198 in Animals: From ApoE Knockout Mice to Rhesus Monkeys. Front Pharmacol 2018; 9:1468. [PMID: 30618759 PMCID: PMC6300478 DOI: 10.3389/fphar.2018.01468] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 11/30/2018] [Indexed: 12/19/2022] Open
Abstract
Although several lipid-lowering agents have been introduced for the treatment of atherosclerosis (AS), currently marketed medications have not solved the problem completely. This study aims to investigate the effects of leonurine (SCM-198) on dyslipidemia in mammals with ApoE knockout (ApoE-/-) mice, New Zealand white rabbits and senile Rhesus monkeys fed with high fat diet were dosed daily with leonurine or atorvastatin. The serum total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL), and high-density lipoprotein (HDL) were determined. Moreover, in Rhesus monkeys, bodyweight, arterial ultrasound of right common carotid artery, Apolipoprotein A1 (ApoA1) and ApoB levels, hematologic and toxicological examinations were detected. Serum TC and TG in both mice and rabbits were significantly reduced by SCM-198 and atorvastatin. In the 10 mg/kg SCM-198 group of monkeys, maximum TC reduction of 24.05% was achieved at day 150, while 13.16% LDL reduction achieved at day 60, without arterial morphologic changes or adverse events. Atorvastatin (1.2 mg/kg) showed similar effects as SCM-198 in improving lipid profiles in monkeys, yet its long-term use could induce tolerance. Furthermore, leonurine suppressed genes expression of fatty acid synthesis, such as fatty acid synthase (FASN), stearoyl-CoA desaturase (SCD-1), sterol regulatory element-binding protein (SREBF) in liver in high fat diet feeding ApoE-/- mice. SCM-198, with a reliable safety profile, is of high value in improving lipid profiles in mammals, providing an alternative to a substantial population who are statin-intolerant.
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Affiliation(s)
- Rinkiko Suguro
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, China.,School of Pharmacy, Macau University of Science and Technology - State Key Laboratory of Quality Research in Chinese Medicine, Taipa, Macau
| | - Siyao Chen
- Department of Cardiac Surgery, Guangdong General Hospital, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Di Yang
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, China
| | | | - Lei Miao
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, China
| | - Weijun Wu
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, China
| | - Wen Zeng
- Sichuan Primed Co., Ltd., Chengdu, China
| | - Xinhua Liu
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, China
| | - Yi Zhun Zhu
- Shanghai Key Laboratory of Bioactive Small Molecules, Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai, China.,School of Pharmacy, Macau University of Science and Technology - State Key Laboratory of Quality Research in Chinese Medicine, Taipa, Macau
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190
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Kim YS, Lee YM, Oh TI, Shin DH, Kim GH, Kan SY, Kang H, Kim JH, Kim BM, Yim WJ, Lim JH. Emodin Sensitizes Hepatocellular Carcinoma Cells to the Anti-Cancer Effect of Sorafenib through Suppression of Cholesterol Metabolism. Int J Mol Sci 2018; 19:ijms19103127. [PMID: 30321984 PMCID: PMC6213641 DOI: 10.3390/ijms19103127] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/01/2018] [Accepted: 10/10/2018] [Indexed: 12/12/2022] Open
Abstract
Reduced therapeutic efficacy of sorafenib, a first-generation multikinase inhibitor, is often observed during the treatment of advanced hepatocellular carcinoma (HCC). Emodin is an active component of Chinese herbs, and is effective against leukemia, lung cancer, colon cancer, pancreatic cancer, and HCC; however, the sensitizing effect of emodin on sorafenib-based HCC therapy has not been evaluated. Here, we demonstrate that emodin significantly improved the anti-cancer effect of sorafenib in HCC cells, such as HepG2, Hep3B, Huh7, SK-HEP-1, and PLC/PRF5. Mechanistically, emodin inhibits sterol regulatory element-binding protein-2 (SREBP-2) transcriptional activity, which suppresses cholesterol biosynthesis and oncogenic protein kinase B (AKT) signaling. Additionally, attenuated cholesterol synthesis and oncogenic AKT signaling inactivated signal transducer and activator of transcription 3 (STAT3), an oncogenic transcription factor. Furthermore, emodin synergistically increased cell cycle arrest in the G1 phase and apoptotic cells in the presence of sorafenib. Animal models xenografted with HepG2 or SK-HEP-1 cells also showed that the combination of emodin and sorafenib was sufficient to inhibit tumor growth. Overall, these results suggested that the combination of emodin and sorafenib may offer a potential therapy for patients with advanced HCC.
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Affiliation(s)
- Young-Seon Kim
- Department of Biomedical Chemistry, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Chungbuk, Korea.
| | - Yoon-Mi Lee
- Department of Food Bioscience, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Chungbuk, Korea.
| | - Taek-In Oh
- Department of Biomedical Chemistry, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Chungbuk, Korea.
| | - Dong Hoon Shin
- Research Institute, National Cancer Center, Department of Cancer Biomedical Science, National Cancer Center Graduate School of Cancer Science and Policy, Goyang 10408, Korea.
| | - Geon-Hee Kim
- Department of Biomedical Chemistry, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Chungbuk, Korea.
| | - Sang-Yeon Kan
- Department of Biomedical Chemistry, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Chungbuk, Korea.
| | - Hyeji Kang
- Department of Biomedical Chemistry, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Chungbuk, Korea.
| | - Ji Hyung Kim
- College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea.
| | - Byeong Mo Kim
- Severance Integrative Research Institute for Cerebral & Cardiovascular Diseases (SIRIC), Yonsei University College of Medicine, Seodaemun-gu, Seoul 03722, Korea.
| | - Woo Jong Yim
- Jung-Ang Microbe Research Institute (JM), 398, Jikji-daero, Heungdeok-gu, Cheongju 28576, Chungbuk, Korea.
| | - Ji-Hong Lim
- Department of Biomedical Chemistry, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Chungbuk, Korea.
- Diabetes and Bio-Research Center, Konkuk University, Chungju 27478, Chungbuk, Korea.
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