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Su Y, Sun D, Cao C, Wang Y. Lanosterol regulates abnormal amyloid accumulation in LECs through the mediation of cholesterol pathway metabolism. Biochem Biophys Rep 2024; 38:101679. [PMID: 38501050 PMCID: PMC10945048 DOI: 10.1016/j.bbrep.2024.101679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/27/2024] [Accepted: 02/28/2024] [Indexed: 03/20/2024] Open
Abstract
Age-related cataract (ARC) is the predominant cause of global blindness, linked to the progressive aging of the lens, oxidative stress, perturbed calcium homeostasis, hydration irregularities, and modifications in crystallin proteins. Currently, surgical intervention remains the sole efficacious remedy, albeit carrying inherent risks of complications that may culminate in irreversible blindness. It is urgent to explore alternative, cost-effective, and uncomplicated treatment modalities for cataracts. Lanosterol has been widely reported to reverse cataracts, but the mechanism of action is not yet clear. In this study, we elucidated the mechanism through which lanosterol operates in the context of cataract reversal. Through the targeted suppression of sterol regulatory element-binding protein 2 (SREBP2) followed by lanosterol treatment, we observed the restoration of lipid metabolism disorders induced by SREBP2 knockdown in lens epithelial cells (LECs). Notably, lanosterol exhibited the ability to effectively counteract amyloid accumulation and cellular apoptosis triggered by lipid metabolism disorders. In summary, our findings suggest that lanosterol, a pivotal intermediate in lipid metabolism, may exert its therapeutic effects on cataracts by influencing lipid metabolism. This study shed light on the treatment and pharmaceutical development targeting Age-related Cataracts (ARC).
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Affiliation(s)
- Yingxue Su
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Engineering Research Center for Ophthalmic Drug Creation and Evaluation, Guangzhou, 510060, China
| | - Danyuan Sun
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Chen Cao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Engineering Research Center for Ophthalmic Drug Creation and Evaluation, Guangzhou, 510060, China
| | - Yandong Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Engineering Research Center for Ophthalmic Drug Creation and Evaluation, Guangzhou, 510060, China
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
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2
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Li K, Wang F, Liu S, Cheng X, Xu J, Liu X, Zhang L. Response and adaptation mechanisms of Apostichopus japonicus to single and combined anthropogenic stresses of polystyrene microplastics or cadmium. MARINE POLLUTION BULLETIN 2024; 204:116519. [PMID: 38850758 DOI: 10.1016/j.marpolbul.2024.116519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/21/2024] [Accepted: 05/21/2024] [Indexed: 06/10/2024]
Abstract
Microplastics (MPs) have become pervasive in marine ecosystems, exerting detrimental effects on marine life. The concurrent presence and interaction of MPs and heavy metals in aquatic environments could engender more insidious toxicological impacts. This study aimed to elucidate the potential impacts and underlying mechanisms of polystyrene microplastics (PS-MPs), cadmium (Cd), and their combined stress (MPs-Cd) on sea cucumbers (Apostichopus japonicus). It focused on the growth, Cd bioaccumulation, oxidative stress responses, immunoenzymatic activities, and metabolic profiles, specifically considering PS-MPs sizes preferentially ingested by these organisms. The high-dose MPs (MH) treatment group exhibited an increase in cadmium bioavailability within the sea cucumbers. Exposure to PS-MPs or Cd triggered the activation of antioxidant defenses and immune responses. PS-MPs and Cd exhibited a synergistic effect on lysozyme (LZM) activity. A total of 149, 316, 211, 197, 215, 619, 434, and 602 differentially expressed metabolites were identified, distinguishing the low-dose MPs (ML), high-dose MPs (MH), low-dose Cd (LCd), low-dose MPs and low-dose Cd (MLLCd), high-dose MPs and low-dose Cd (MHLCd), high-dose Cd (HCd), low-dose MPs and high-dose Cd (MLHCd), high-dose MPs and high-dose Cd (MHHCd) groups, respectively. Metabolomic analyses revealed disruptions in lipid metabolism, nervous system function, signal transduction, and transport and catabolism pathways following exposure to PS-MPs, Cd, and MPs-Cd. Correlation analyses among key differentially expressed metabolites (DEMs) underscored the interregulation among these metabolic pathways. These results offer new perspectives on the distinct and synergistic toxicological impacts of microplastics and cadmium on aquatic species, highlighting the complex interplay between environmental contaminants and their effects on marine life.
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Affiliation(s)
- Kehan Li
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao 266237, China; CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Fayuan Wang
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Shuai Liu
- Binzhou Ocean Development Research Institute, Binzhou 256600, China
| | - Xiaochen Cheng
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao 266237, China; CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jialei Xu
- Zhongke Tonghe (Shandong) Ocean Technology Co., Ltd., Dongying 257200, China
| | - Xiao Liu
- Zhongke Tonghe (Shandong) Ocean Technology Co., Ltd., Dongying 257200, China
| | - Libin Zhang
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao 266237, China; CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
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3
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Su B, Lai P, Deng MR, Zhu H. Global rewiring of lipid metabolism to produce carotenoid by deleting the transcription factor genes ino2/ino4 in Saccharomyces cerevisiae. Int J Biol Macromol 2024; 264:130400. [PMID: 38412934 DOI: 10.1016/j.ijbiomac.2024.130400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 02/03/2024] [Accepted: 02/21/2024] [Indexed: 02/29/2024]
Abstract
The transcription factor complex INO2 and INO4 in Saccharomyces cerevisiae plays a vital role in lipid biosynthesis by activating multiple genes in the biosynthetic pathways of phospholipid, fatty acid, and sterol. Previous studies have reported conflicting results regarding the effects of ino2 and ino4 gene expression levels on target chemicals. Therefore, this study aimed to examine the influence of different ino2 and ino4 expression levels on carotenoid production (e.g., lycopene), which shares a common precursor, acetyl-CoA, with lipid metabolism. Surprisingly, 2.6- and 1.8-fold increase in lycopene yield in the ino2 and ino4 deletion strains were found, respectively. In contrast, ino2 overexpression did not promote lycopene accumulation. Additionally, there was a decrease in intracellular free fatty acids in the ino2 deletion strain. Comparative transcriptome analysis revealed a significant downregulation of genes related to lipid biosynthesis in the ino2 deletion strain. To our knowledge, this is the first report showing that deletion of transcription factor genes ino2 and ino4 can facilitate lycopene accumulation. These findings hold significant implications for the development of metabolically engineered S. cerevisiae with enhanced carotenoid production.
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Affiliation(s)
- Buli Su
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Peixuan Lai
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China
| | - Ming-Rong Deng
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China.
| | - Honghui Zhu
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Key Laboratory of Agricultural Microbiome (MARA), State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, People's Republic of China.
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Wang Y, Zhao Z, Guo T, Wu T, Zhang M, Luo D, Dou K, Yang Y, Jin C, Zhang B, Zhang B, Han B. SOCS5-RBMX stimulates SREBP1-mediated lipogenesis to promote metastasis in steatotic HCC with HBV-related cirrhosis. NPJ Precis Oncol 2024; 8:58. [PMID: 38429411 PMCID: PMC10907597 DOI: 10.1038/s41698-024-00545-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 02/16/2024] [Indexed: 03/03/2024] Open
Abstract
Abnormal lipid metabolism promotes hepatocellular carcinoma (HCC) progression, which engenders therapeutic difficulties owing to unclear mechanisms of the phenomenon. We precisely described a special steatotic HCC subtype with HBV-related cirrhosis and probed its drivers. Hematoxylin-eosin (HE) staining of 245 HCC samples revealed a special HCC subtype (41 cases) characterized by HBV-related cirrhosis and intratumoral steatosis without fatty liver background, defined as steatotic HCC with HBV-related cirrhosis (SBC-HCC). SBC-HCC exhibits a larger tumor volume and worse prognosis than non-SBC-HCC. Screening for driver genes promoting fatty acid (FA) biosynthesis in the Gao's HBV-related cirrhosis HCC cases and GSE121248' HBV-related HCC cases revealed that high expression of SOCS5 predicts increased FA synthesis and that SOCS5 is upregulated in SBC-HCC. Through proteomics, metabolomics, and both in vivo and in vitro experiments, we demonstrated that SOCS5 induces lipid accumulation to promote HCC metastasis. Mechanistically, through co-IP and GST-pulldown experiments, we found that the SOCS5-SH2 domain, especially the amino acids Y413 and D443, act as critical binding sites for the RBMX-RRM domain. SOCS5-RBMX costimulates the promoter of SREBP1, inducing de novo lipogenesis, while mutations in the SH2 domain, Y413, and D443 reverse this effect. These findings precisely identified SBC-HCC as a special steatotic HCC subtype and highlighted a new mechanism by which SOCS5 promotes SBC-HCC metastasis.
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Affiliation(s)
- Youpeng Wang
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Ziyin Zhao
- Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Tingting Guo
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Tiansong Wu
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Mao Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Dingan Luo
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Kunpeng Dou
- College of Information Science and Engineering, Ocean University of China, Qingdao, China
| | - Yeni Yang
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Cheng Jin
- Institute of Medical Robotics, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Bingyuan Zhang
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Bin Zhang
- Organ Transplantation Center, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China.
| | - Bing Han
- Department of Hepatobiliary and Pancreatic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, China.
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5
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Geng F, Zhong Y, Su H, Lefai E, Magaki S, Cloughesy TF, Yong WH, Chakravarti A, Guo D. SREBP-1 upregulates lipophagy to maintain cholesterol homeostasis in brain tumor cells. Cell Rep 2023; 42:112790. [PMID: 37436895 PMCID: PMC10528745 DOI: 10.1016/j.celrep.2023.112790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 05/22/2023] [Accepted: 06/23/2023] [Indexed: 07/14/2023] Open
Abstract
Cholesterol is a structural component of cell membranes. How rapidly growing tumor cells maintain membrane cholesterol homeostasis is poorly understood. Here, we found that glioblastoma (GBM), the most lethal brain tumor, maintains normal levels of membrane cholesterol but with an abundant presence of cholesteryl esters (CEs) in its lipid droplets (LDs). Mechanistically, SREBP-1 (sterol regulatory element-binding protein 1), a master transcription factor that is activated upon cholesterol depletion, upregulates critical autophagic genes, including ATG9B, ATG4A, and LC3B, as well as lysosome cholesterol transporter NPC2. This upregulation promotes LD lipophagy, resulting in the hydrolysis of CEs and the liberation of cholesterol from the lysosomes, thus maintaining plasma membrane cholesterol homeostasis. When this pathway is blocked, GBM cells become quite sensitive to cholesterol deficiency with poor growth in vitro. Our study unravels an SREBP-1-autophagy-LD-CE hydrolysis pathway that plays an important role in maintaining membrane cholesterol homeostasis while providing a potential therapeutic avenue for GBM.
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Affiliation(s)
- Feng Geng
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital, The Ohio State University, Columbus, OH 43210, USA; Richard J. Solove Research Institute, The Ohio State University, Columbus, OH 43210, USA; College of Medicine at The Ohio State University, Columbus, OH 43210, USA
| | - Yaogang Zhong
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital, The Ohio State University, Columbus, OH 43210, USA; Richard J. Solove Research Institute, The Ohio State University, Columbus, OH 43210, USA; College of Medicine at The Ohio State University, Columbus, OH 43210, USA
| | - Huali Su
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital, The Ohio State University, Columbus, OH 43210, USA; Richard J. Solove Research Institute, The Ohio State University, Columbus, OH 43210, USA; College of Medicine at The Ohio State University, Columbus, OH 43210, USA
| | - Etienne Lefai
- Human Nutrition Unit, French National Research Institute for Agriculture, Food and Environment, University Clermont Auvergne, 63122 Clermont-Ferrand, France
| | - Shino Magaki
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles, CA 90095, USA
| | - Timothy F Cloughesy
- Department of Neurology (Neuro-Oncology), David Geffen School of Medicine at the University of California, Los Angeles, CA 90095, USA
| | - William H Yong
- Department of Pathology and Laboratory Medicine, School of Medicine at University of California, Irvine, CA 92617, USA
| | - Arnab Chakravarti
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital, The Ohio State University, Columbus, OH 43210, USA; Richard J. Solove Research Institute, The Ohio State University, Columbus, OH 43210, USA; College of Medicine at The Ohio State University, Columbus, OH 43210, USA
| | - Deliang Guo
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital, The Ohio State University, Columbus, OH 43210, USA; Richard J. Solove Research Institute, The Ohio State University, Columbus, OH 43210, USA; College of Medicine at The Ohio State University, Columbus, OH 43210, USA; Center of Cancer Metabolism, The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA.
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6
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Øyri LKL, Christensen JJ, Sebert S, Thoresen M, Michelsen TM, Ulven SM, Brekke HK, Retterstøl K, Brantsæter AL, Magnus P, Bogsrud MP, Holven KB. Maternal prenatal cholesterol levels predict offspring weight trajectories during childhood in the Norwegian Mother, Father and Child Cohort Study. BMC Med 2023; 21:43. [PMID: 36747215 PMCID: PMC9903496 DOI: 10.1186/s12916-023-02742-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 01/18/2023] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Numerous intrauterine factors may affect the offspring's growth during childhood. We aimed to explore if maternal and paternal prenatal lipid, apolipoprotein (apo)B and apoA1 levels are associated with offspring weight, length, and body mass index from 6 weeks to eight years of age. This has previously been studied to a limited extent. METHODS This parental negative control study is based on the Norwegian Mother, Father and Child Cohort Study and uses data from the Medical Birth Registry of Norway. We included 713 mothers and fathers with or without self-reported hypercholesterolemia and their offspring. Seven parental metabolites were measured by nuclear magnetic resonance spectroscopy, and offspring weight and length were measured at 12 time points. Data were analyzed by linear spline mixed models, and the results are presented as the interaction between parental metabolite levels and offspring spline (age). RESULTS Higher maternal total cholesterol (TC) level was associated with a larger increase in offspring body weight up to 8 years of age (0.03 ≤ Pinteraction ≤ 0.04). Paternal TC level was not associated with change in offspring body weight (0.17 ≤ Pinteraction ≤ 0.25). Higher maternal high-density lipoprotein cholesterol (HDL-C) and apoA1 levels were associated with a lower increase in offspring body weight up to 8 years of age (0.001 ≤ Pinteraction ≤ 0.005). Higher paternal HDL-C and apoA1 levels were associated with a lower increase in offspring body weight up to 5 years of age but a larger increase in offspring body weight from 5 to 8 years of age (0.01 ≤ Pinteraction ≤ 0.03). Parental metabolites were not associated with change in offspring height or body mass index up to 8 years of age (0.07 ≤ Pinteraction ≤ 0.99). CONCLUSIONS Maternal compared to paternal TC, HDL-C, and apoA1 levels were more strongly and consistently associated with offspring body weight during childhood, supporting a direct intrauterine effect.
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Affiliation(s)
- Linn K L Øyri
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, PO Box 1046, Blindern, 0317, Oslo, Norway
| | - Jacob J Christensen
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, PO Box 1046, Blindern, 0317, Oslo, Norway
| | - Sylvain Sebert
- Research Unit of Population Health, Faculty of Medicine, PO Box 5000, FI-90014 University of Oulu, Oulu, Finland
| | - Magne Thoresen
- Oslo Centre for Biostatistics and Epidemiology, Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, PO Box 1122, Blindern, 0317, Oslo, Norway
| | - Trond M Michelsen
- Department of Obstetrics, Oslo University Hospital Rikshospitalet, PO Box 4956, Nydalen, 0424, Oslo, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, PO Box 1171, Blindern, 0318, Oslo, Norway
| | - Stine M Ulven
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, PO Box 1046, Blindern, 0317, Oslo, Norway
| | - Hilde K Brekke
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, PO Box 1046, Blindern, 0317, Oslo, Norway
| | - Kjetil Retterstøl
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, PO Box 1046, Blindern, 0317, Oslo, Norway.,The Lipid Clinic, Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital Aker, PO Box 4959, Nydalen, 0424, Oslo, Norway
| | - Anne Lise Brantsæter
- Division of Climate and Environmental Health, Department of Food Safety, Norwegian Institute of Public Health, PO Box 222, Skøyen, 0213, Oslo, Norway
| | - Per Magnus
- Centre for Fertility and Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, 0213, Oslo, Norway
| | - Martin P Bogsrud
- Unit for Cardiac and Cardiovascular Genetics, Department of Medical Genetics, Oslo University Hospital Ullevål, PO Box 4956, Nydalen, 0424, Oslo, Norway
| | - Kirsten B Holven
- Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, PO Box 1046, Blindern, 0317, Oslo, Norway. .,Norwegian National Advisory Unit on Familial Hypercholesterolemia, Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital Aker, PO Box 4959, Nydalen, 0424, Oslo, Norway.
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7
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Xia W, Wang H, Zhou X, Wang Y, Xue L, Cao B, Song J. The role of cholesterol metabolism in tumor therapy, from bench to bed. Front Pharmacol 2023; 14:928821. [PMID: 37089950 PMCID: PMC10117684 DOI: 10.3389/fphar.2023.928821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 03/28/2023] [Indexed: 04/25/2023] Open
Abstract
Cholesterol and its metabolites have important biological functions. Cholesterol is able to maintain the physical properties of cell membrane, play an important role in cellular signaling, and cellular cholesterol levels reflect the dynamic balance between biosynthesis, uptake, efflux and esterification. Cholesterol metabolism participates in bile acid production and steroid hormone biosynthesis. Increasing evidence suggests a strict link between cholesterol homeostasis and tumors. Cholesterol metabolism in tumor cells is reprogrammed to differ significantly from normal cells, and disturbances of cholesterol balance also induce tumorigenesis and progression. Preclinical and clinical studies have shown that controlling cholesterol metabolism suppresses tumor growth, suggesting that targeting cholesterol metabolism may provide new possibilities for tumor therapy. In this review, we summarized the metabolic pathways of cholesterol in normal and tumor cells and reviewed the pre-clinical and clinical progression of novel tumor therapeutic strategy with the drugs targeting different stages of cholesterol metabolism from bench to bedside.
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Affiliation(s)
- Wenhao Xia
- Cancer Center of Peking University Third Hospital, Beijing, China
- School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Hao Wang
- Cancer Center of Peking University Third Hospital, Beijing, China
- Department of Radiation Oncology, Peking University Third Hospital, Beijing, China
| | - Xiaozhu Zhou
- Department of Clinical Pharmacy, School of Pharmacy, Capital Medical University, Beijing, China
| | - Yan Wang
- Cancer Center of Peking University Third Hospital, Beijing, China
- Third Hospital Institute of Medical Innovation and Research, Beijing, China
| | - Lixiang Xue
- Cancer Center of Peking University Third Hospital, Beijing, China
- Department of Radiation Oncology, Peking University Third Hospital, Beijing, China
- Third Hospital Institute of Medical Innovation and Research, Beijing, China
- *Correspondence: Lixiang Xue, ; Baoshan Cao, ; Jiagui Song,
| | - Baoshan Cao
- Cancer Center of Peking University Third Hospital, Beijing, China
- Department of Medical Oncology and Radiation Sickness, Peking University Third Hospital, Beijing, China
- *Correspondence: Lixiang Xue, ; Baoshan Cao, ; Jiagui Song,
| | - Jiagui Song
- Cancer Center of Peking University Third Hospital, Beijing, China
- Third Hospital Institute of Medical Innovation and Research, Beijing, China
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University as the Third Responsibility Unit of Song Jiagui, Beijing, China
- *Correspondence: Lixiang Xue, ; Baoshan Cao, ; Jiagui Song,
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8
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Cholesterol sulfate alleviates ulcerative colitis by promoting cholesterol biosynthesis in colonic epithelial cells. Nat Commun 2022; 13:4428. [PMID: 35908039 PMCID: PMC9338998 DOI: 10.1038/s41467-022-32158-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/18/2022] [Indexed: 12/04/2022] Open
Abstract
Cholesterol sulfate, produced by hydroxysteroid sulfotransferase 2B1 (SULT2B1), is highly abundant in the intestine. Herein, we study the functional role and underlying intestinal epithelial repair mechanisms of cholesterol sulfate in ulcerative colitis. The levels of cholesterol and cholesterol sulfate, as well as the expression of Sult2b1 and genes involved in cholesterol biosynthesis, are significantly higher in inflamed tissues from patients with ulcerative colitis than in intestinal mucosa from healthy controls. Cholesterol sulfate in the gut and circulation is mainly catalyzed by intestinal epithelial SULT2B1. Specific deletion of the Sult2b1 gene in the intestinal epithelial cells aggravates dextran sulfate sodium-induced colitis; however, dietary supplementation with cholesterol sulfate ameliorates this effect in acute and chronic ulcerative colitis in mice. Cholesterol sulfate promotes cholesterol biosynthesis by binding to Niemann-Pick type C2 protein and activating sterol regulatory element binding protein 2 in colonic epithelial cells, thereby alleviates ulcerative colitis. In conclusion, cholesterol sulfate contributes to the healing of the mucosal barrier and exhibits therapeutic efficacy against ulcerative colitis in mice. New treatment strategies are required for ulcerative colitis. Here the authors show in mouse models that cholesterol sulfate, an endogenous active cholesterol derivative, contributes to the healing of the mucosal barrier by promoting cholesterol biosynthesis in colonic epithelial cells and exhibits therapeutic efficacy against ulcerative colitis.
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9
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Cheng C, Geng F, Li Z, Zhong Y, Wang H, Cheng X, Zhao Y, Mo X, Horbinski C, Duan W, Chakravarti A, Cheng X, Guo D. Ammonia stimulates SCAP/Insig dissociation and SREBP-1 activation to promote lipogenesis and tumour growth. Nat Metab 2022; 4:575-588. [PMID: 35534729 PMCID: PMC9177652 DOI: 10.1038/s42255-022-00568-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 03/30/2022] [Indexed: 12/31/2022]
Abstract
Tumorigenesis is associated with elevated glucose and glutamine consumption, but how cancer cells can sense their levels to activate lipid synthesis is unknown. Here, we reveal that ammonia, released from glutamine, promotes lipogenesis via activation of sterol regulatory element-binding proteins (SREBPs), endoplasmic reticulum-bound transcription factors that play a central role in lipid metabolism. Ammonia activates the dissociation of glucose-regulated, N-glycosylated SREBP-cleavage-activating protein (SCAP) from insulin-inducible gene protein (Insig), an endoplasmic reticulum-retention protein, leading to SREBP translocation and lipogenic gene expression. Notably, 25-hydroxycholesterol blocks ammonia to access its binding site on SCAP. Mutating aspartate D428 to alanine prevents ammonia binding to SCAP, abolishes SREBP-1 activation and suppresses tumour growth. Our study characterizes the unknown role, opposite to sterols, of ammonia as a key activator that stimulates SCAP-Insig dissociation and SREBP-1 activation to promote tumour growth and demonstrates that SCAP is a critical sensor of glutamine, glucose and sterol levels to precisely control lipid synthesis.
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Affiliation(s)
- Chunming Cheng
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, and College of Medicine at The Ohio State University, Columbus, OH, USA
| | - Feng Geng
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, and College of Medicine at The Ohio State University, Columbus, OH, USA
| | - Zoe Li
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy at The Ohio State University, Columbus, OH, USA
| | - Yaogang Zhong
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, and College of Medicine at The Ohio State University, Columbus, OH, USA
| | - Huabao Wang
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, and College of Medicine at The Ohio State University, Columbus, OH, USA
| | - Xiang Cheng
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, and College of Medicine at The Ohio State University, Columbus, OH, USA
| | - Yue Zhao
- Bioinformatics Shared Resource Group, Department of Biomedical Informatics, College of Medicine at The Ohio State University, Columbus, OH, USA
| | - Xiaokui Mo
- Biostatistic Center and Department of Biomedical Informatics, College of Medicine at The Ohio State University, Columbus, OH, USA
| | - Craig Horbinski
- Departments of Pathology and Neurosurgery, Feinberg School of Medicine at Northwestern University, Chicago, IL, USA
| | - Wenrui Duan
- Department of Human and Molecular Genetics, Herbert Wertheim College of Medicine at the Florida International University, Miami, FL, USA
| | - Arnab Chakravarti
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, and College of Medicine at The Ohio State University, Columbus, OH, USA
| | - Xiaolin Cheng
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy at The Ohio State University, Columbus, OH, USA
- Translational Data Analytics Institute (TDAI) at The Ohio State University, Columbus, OH, USA
| | - Deliang Guo
- Department of Radiation Oncology, Ohio State Comprehensive Cancer Center, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, and College of Medicine at The Ohio State University, Columbus, OH, USA.
- Center for Cancer Metabolism, James Comprehensive Cancer Center at The Ohio State University, Columbus, OH, USA.
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10
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Quon E, Nenadic A, Zaman MF, Johansen J, Beh CT. ER-PM membrane contact site regulation by yeast ORPs and membrane stress pathways. PLoS Genet 2022; 18:e1010106. [PMID: 35239652 PMCID: PMC8923467 DOI: 10.1371/journal.pgen.1010106] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/15/2022] [Accepted: 02/16/2022] [Indexed: 02/01/2023] Open
Abstract
In yeast, at least seven proteins (Ice2p, Ist2p, Scs2/22p, Tcb1-Tcb3p) affect cortical endoplasmic reticulum (ER) tethering and contact with the plasma membrane (PM). In Δ-super-tether (Δ-s-tether) cells that lack these tethers, cortical ER-PM association is all but gone. Yeast OSBP homologue (Osh) proteins are also implicated in membrane contact site (MCS) assembly, perhaps as subunits for multicomponent tethers, though their function at MCSs involves intermembrane lipid transfer. Paradoxically, when analyzed by fluorescence and electron microscopy, the elimination of the OSH gene family does not reduce cortical ER-PM association but dramatically increases it. In response to the inactivation of all Osh proteins, the yeast E-Syt (extended-synaptotagmin) homologue Tcb3p is post-transcriptionally upregulated thereby generating additional Tcb3p-dependent ER-PM MCSs for recruiting more cortical ER to the PM. Although the elimination of OSH genes and the deletion of ER-PM tether genes have divergent effects on cortical ER-PM association, both elicit the Environmental Stress Response (ESR). Through comparisons of transcriptomic profiles of cells lacking OSH genes or ER-PM tethers, changes in ESR expression are partially manifested through the induction of the HOG (high-osmolarity glycerol) PM stress pathway or the ER-specific UPR (unfolded protein response) pathway, respectively. Defects in either UPR or HOG pathways also increase ER-PM MCSs, and expression of extra “artificial ER-PM membrane staples” rescues growth of UPR mutants challenged with lethal ER stress. Transcriptome analysis of OSH and Δ-s-tether mutants also revealed dysregulation of inositol-dependent phospholipid gene expression, and the combined lethality of osh4Δ and Δ-s-tether mutations is suppressed by overexpression of the phosphatidic acid biosynthetic gene, DGK1. These findings establish that the Tcb3p tether is induced by ER and PM stresses and ER-PM MCSs augment responses to membrane stresses, which are integrated through the broader ESR pathway. Membrane contact sites (MCSs) between the two largest cellular membranes, the endoplasmic reticulum (ER) and the plasma membrane (PM), are regulatory interfaces for lipid synthesis and bidirectional transport. The yeast Osh protein family, which represents the seven yeast oxysterol-binding protein related proteins (ORPs), is implicated in MCS regulation and lipid transfer between membranes. Ironically, we find that when all Osh proteins eliminated, ER-PM association is not reduced but significantly increases. We hypothesized this increase is due to compensatory increases in levels of tether proteins that physically link the ER and PM. In fact, in response to inactivating Osh protein expression, amounts of the tether protein Tcb3 increase and more ER-PM MCSs are produced. By testing the genomic transcriptional responses to the elimination of OSH and ER-PM tether genes, we find these mutants disrupt phospholipid regulation and they elicit the Environmental Stress Response (ESR) pathway, which integrates many different responses needed for recovery after cellular stress. OSH and ER-PM tether genes affect specific stress response pathways that impact the PM and ER, respectively. Combining OSH and tether mutations results in cell lethality, but these cells survive by increased expression of a key phospholipid biosynthetic gene. Based on these results, we propose that OSH and ER-PM tether genes affect phospholipid regulation and protect the PM and ER through membrane stress responses integrated through the ESR pathway.
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Affiliation(s)
- Evan Quon
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Aleksa Nenadic
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Mohammad F. Zaman
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Jesper Johansen
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Christopher T. Beh
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
- Centre for Cell Biology, Development, and Disease, Simon Fraser University, Burnaby, Canada
- * E-mail:
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11
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Li X, Liu Z, Xia C, Yan K, Fang Z, Fan Y. SETD8 stabilized by USP17 epigenetically activates SREBP1 pathway to drive lipogenesis and oncogenesis of ccRCC. Cancer Lett 2021; 527:150-163. [PMID: 34942305 DOI: 10.1016/j.canlet.2021.12.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 12/01/2021] [Accepted: 12/13/2021] [Indexed: 02/06/2023]
Abstract
Recently, epigenetic modifications, including DNA methylation, histone modification and noncoding RNA (ncRNA)-associated gene silencing, have received increasing attention from the scientific community. Many studies have demonstrated that epigenetic regulation can render dynamic alterations in the transcriptional potential of a cell, which then affects the cell's biological function. The initiation and development of clear cell renal cell carcinoma (ccRCC), the most common subtype of renal cell cancer (RCC), is also closely related to genomic alterations by epigenetic modification. For ccRCC, lipid accumulation is one of the most typical characteristics. In other words, dysregulation of lipid uptake and synthesis occurs in ccRCC, which inversely promotes cancer proliferation and progression. However, the link among epigenetic alterations, lipid biosynthesis and renal cancer progression remains unclear. SETD8 is a histone methyltransferase and plays pivotal roles in cell cycle regulation and oncogenesis of various cancers, but its role in RCC is not well understood. In this study, we discovered that SETD8 was significantly overexpressed in RCC tumors, which was positively related to lipid storage and correlated with advanced tumor grade and stage and poor patient prognosis. Depletion of SETD8 by siRNAs or inhibitor UNC0379 diminished fatty acid (FA) de novo synthesis, cell proliferation and metastasis in ccRCC cells. Mechanistically, SETD8, which was posttranslationally stabilized by USP17, could transcriptionally modulate sterol regulatory element-binding protein 1 (SREBP1), a key transcription factor in fatty acid biosynthesis and lipogenesis, by monomethylating the 20th lysine of the H4 histone, elevating lipid biosynthesis and accumulation in RCC and further promoting cancer progression and metastasis. Taken together, the USP17/SETD8/SREBP1 signaling pathway plays a pivotal role in promoting RCC progression. SETD8 might be a novel biomarker and potential therapeutic target for treating RCC.
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Affiliation(s)
- Xiaofeng Li
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji Nan 250012, Shandong, China; Key Laboratory of Cardio-vascular Remodeling and Function Research, Chinese Ministry of Education, Chinese Ministry of Health, China.
| | - Zhengfang Liu
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji Nan 250012, Shandong, China.
| | - Chuanyou Xia
- The First Affiliated Hospital of Shandong First Medical University/Shandong Provincial Qian-Fo-Shan Hospital, China.
| | - Keqiang Yan
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji Nan 250012, Shandong, China.
| | - Zhiqing Fang
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji Nan 250012, Shandong, China.
| | - Yidong Fan
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Ji Nan 250012, Shandong, China.
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12
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Liu J, Li T, Pei W, Zhao Y, Zhang X, Shi X, Li Y, Xu W. Lipidomics reveals the dysregulated ceramide metabolism in oxidized low-density lipoprotein-induced macrophage-derived foam cell. Biomed Chromatogr 2021; 36:e5297. [PMID: 34893994 DOI: 10.1002/bmc.5297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 10/01/2021] [Accepted: 11/23/2021] [Indexed: 12/12/2022]
Abstract
Atherosclerosis (AS) is associated with increasing lipid peroxidation. Oxidative modification of low-density lipoproteins (ox-LDL) is one most important factors contributing to the pathogenesis and clinical features of AS. The lipid composition influenced by ox-LDL is not known clearly. In this work, a UHPLC/Orbitrap MS-based lipidomics approach integrated pathway analysis was performed to advance understanding of the lipid composition and feature pathway in an ox-LDL-induced foamy macrophage cell. In the lipid metabolic profiling, 196 lipid species from 15 (sub)classes were identified. Lipid profiling indicated that increasing ox-LDL caused lipid metabolic alternations, manifesting as phospholipids being down-regulated and sphingolipids being up-regulated. Pathway analysis explored glycerophospholipid and sphingolipid metabolism, which was involved in atherogenic changes. Notably, dysregulated ceramide metabolism was a typical feature of foamy cell formation. qRT-PCR analysis was conducted to explore the differentially expressed genes. It indicated that ceramide metabolic balance might be disordered, performing higher synthesis and lower hydrolysis, with the ratio of SMPD1/SGMS2 being significantly up-regulated (p < 0.05) in the ox-LDL induced group. Our work offers a comprehensive understanding of macrophage-derived foam cells and screen feature pathways associated with foamy cell formation, which provides a reference for the clinic diagnosis of AS and drug interventions.
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Affiliation(s)
- Jie Liu
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Tong Li
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Wenxuan Pei
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Ye Zhao
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Xin Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Xiujia Shi
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yanping Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Wenjuan Xu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
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13
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Fu Y, Zou T, Shen X, Nelson PJ, Li J, Wu C, Yang J, Zheng Y, Bruns C, Zhao Y, Qin L, Dong Q. Lipid metabolism in cancer progression and therapeutic strategies. MedComm (Beijing) 2021; 2:27-59. [PMID: 34766135 PMCID: PMC8491217 DOI: 10.1002/mco2.27] [Citation(s) in RCA: 119] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 07/17/2020] [Accepted: 07/23/2020] [Indexed: 12/24/2022] Open
Abstract
Dysregulated lipid metabolism represents an important metabolic alteration in cancer. Fatty acids, cholesterol, and phospholipid are the three most prevalent lipids that act as energy producers, signaling molecules, and source material for the biogenesis of cell membranes. The enhanced synthesis, storage, and uptake of lipids contribute to cancer progression. The rewiring of lipid metabolism in cancer has been linked to the activation of oncogenic signaling pathways and cross talk with the tumor microenvironment. The resulting activity favors the survival and proliferation of tumor cells in the harsh conditions within the tumor. Lipid metabolism also plays a vital role in tumor immunogenicity via effects on the function of the noncancer cells within the tumor microenvironment, especially immune‐associated cells. Targeting altered lipid metabolism pathways has shown potential as a promising anticancer therapy. Here, we review recent evidence implicating the contribution of lipid metabolic reprogramming in cancer to cancer progression, and discuss the molecular mechanisms underlying lipid metabolism rewiring in cancer, and potential therapeutic strategies directed toward lipid metabolism in cancer. This review sheds new light to fully understanding of the role of lipid metabolic reprogramming in the context of cancer and provides valuable clues on therapeutic strategies targeting lipid metabolism in cancer.
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Affiliation(s)
- Yan Fu
- Department of General Surgery, Huashan Hospital & Cancer Metastasis Institute & Institutes of Biomedical Sciences Fudan University Shanghai China
| | - Tiantian Zou
- Department of General Surgery, Huashan Hospital & Cancer Metastasis Institute & Institutes of Biomedical Sciences Fudan University Shanghai China
| | - Xiaotian Shen
- Department of General Surgery, Huashan Hospital & Cancer Metastasis Institute & Institutes of Biomedical Sciences Fudan University Shanghai China
| | - Peter J Nelson
- Medical Clinic and Policlinic IV Ludwig-Maximilian-University (LMU) Munich Germany
| | - Jiahui Li
- General, Visceral and Cancer Surgery University Hospital of Cologne Cologne Germany
| | - Chao Wu
- Department of General Surgery, Ruijin Hospital Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Jimeng Yang
- Department of General Surgery, Huashan Hospital & Cancer Metastasis Institute & Institutes of Biomedical Sciences Fudan University Shanghai China
| | - Yan Zheng
- Department of General Surgery, Huashan Hospital & Cancer Metastasis Institute & Institutes of Biomedical Sciences Fudan University Shanghai China
| | - Christiane Bruns
- General, Visceral and Cancer Surgery University Hospital of Cologne Cologne Germany
| | - Yue Zhao
- General, Visceral and Cancer Surgery University Hospital of Cologne Cologne Germany
| | - Lunxiu Qin
- Department of General Surgery, Huashan Hospital & Cancer Metastasis Institute & Institutes of Biomedical Sciences Fudan University Shanghai China
| | - Qiongzhu Dong
- Department of General Surgery, Huashan Hospital & Cancer Metastasis Institute & Institutes of Biomedical Sciences Fudan University Shanghai China
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14
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Gu Y, Jiao X, Ye L, Yu H. Metabolic engineering strategies for de novo biosynthesis of sterols and steroids in yeast. BIORESOUR BIOPROCESS 2021; 8:110. [PMID: 38650187 PMCID: PMC10992410 DOI: 10.1186/s40643-021-00460-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 10/16/2021] [Indexed: 12/17/2022] Open
Abstract
Steroidal compounds are of great interest in the pharmaceutical field, with steroidal drugs as the second largest category of medicine in the world. Advances in synthetic biology and metabolic engineering have enabled de novo biosynthesis of sterols and steroids in yeast, which is a green and safe production route for these valuable steroidal compounds. In this review, we summarize the metabolic engineering strategies developed and employed for improving the de novo biosynthesis of sterols and steroids in yeast based on the regulation mechanisms, and introduce the recent progresses in de novo synthesis of some typical sterols and steroids in yeast. The remaining challenges and future perspectives are also discussed.
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Affiliation(s)
- Yuehao Gu
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xue Jiao
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Lidan Ye
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
| | - Hongwei Yu
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
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15
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Fotio Y, Jung KM, Palese F, Obenaus A, Tagne AM, Lin L, Rashid TI, Pacheco R, Jullienne A, Ramirez J, Mor M, Spadoni G, Jang C, Hohmann AG, Piomelli D. NAAA-regulated lipid signaling governs the transition from acute to chronic pain. SCIENCE ADVANCES 2021; 7:eabi8834. [PMID: 34678057 PMCID: PMC8535814 DOI: 10.1126/sciadv.abi8834] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 09/01/2021] [Indexed: 06/13/2023]
Abstract
Chronic pain affects 1.5 billion people worldwide but remains woefully undertreated. Understanding the molecular events leading to its emergence is necessary to discover disease-modifying therapies. Here we show that N-acylethanolamine acid amidase (NAAA) is a critical control point in the progression to pain chronicity, which can be effectively targeted by small-molecule therapeutics that inhibit this enzyme. NAAA catalyzes the deactivating hydrolysis of palmitoylethanolamide, a lipid-derived agonist of the transcriptional regulator of cellular metabolism, peroxisome proliferator-activated receptor-α (PPAR-α). Our results show that disabling NAAA in spinal cord during a 72-h time window following peripheral tissue injury halts chronic pain development in male and female mice by triggering a PPAR-α-dependent reprogramming of local core metabolism from aerobic glycolysis, which is transiently enhanced after end-organ damage, to mitochondrial respiration. The results identify NAAA as a crucial control node in the transition to chronic pain and a molecular target for disease-modifying medicines.
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Affiliation(s)
- Yannick Fotio
- Department of Anatomy and Neurobiology, University of California Irvine, Irvine, CA 92697, USA
| | - Kwang-Mook Jung
- Department of Anatomy and Neurobiology, University of California Irvine, Irvine, CA 92697, USA
| | - Francesca Palese
- Department of Anatomy and Neurobiology, University of California Irvine, Irvine, CA 92697, USA
| | - Andre Obenaus
- Department of Pediatrics, University of California Irvine, Irvine, CA 92697, USA
| | - Alex Mabou Tagne
- Department of Anatomy and Neurobiology, University of California Irvine, Irvine, CA 92697, USA
| | - Lin Lin
- Department of Anatomy and Neurobiology, University of California Irvine, Irvine, CA 92697, USA
| | - Tarif Ibne Rashid
- Department of Anatomy and Neurobiology, University of California Irvine, Irvine, CA 92697, USA
| | - Romario Pacheco
- Psychological and Brain Sciences, Program in Neuroscience, and Gill Center for Biomolecular Science, Indiana University, Bloomington, IN 47401, USA
| | - Amandine Jullienne
- Department of Pediatrics, University of California Irvine, Irvine, CA 92697, USA
| | - Jade Ramirez
- Department of Anatomy and Neurobiology, University of California Irvine, Irvine, CA 92697, USA
| | - Marco Mor
- Dipartimento di Scienze degli Alimenti e del Farmaco, Università di Parma, 43124 Parma, Italy
| | - Gilberto Spadoni
- Dipartimento di Scienze Biomolecolari, Università di Urbino “Carlo Bo,” 61029 Urbino, Italy
| | - Cholsoon Jang
- Department of Biological Chemistry, University of California Irvine, Irvine, CA 92697, USA
| | - Andrea G. Hohmann
- Psychological and Brain Sciences, Program in Neuroscience, and Gill Center for Biomolecular Science, Indiana University, Bloomington, IN 47401, USA
| | - Daniele Piomelli
- Department of Anatomy and Neurobiology, University of California Irvine, Irvine, CA 92697, USA
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16
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Sachdev V, Duta-Mare M, Korbelius M, Vujić N, Leopold C, Freark de Boer J, Rainer S, Fickert P, Kolb D, Kuipers F, Radovic B, Gorkiewicz G, Kratky D. Impaired Bile Acid Metabolism and Gut Dysbiosis in Mice Lacking Lysosomal Acid Lipase. Cells 2021; 10:2619. [PMID: 34685599 PMCID: PMC8533808 DOI: 10.3390/cells10102619] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/26/2021] [Accepted: 09/27/2021] [Indexed: 12/12/2022] Open
Abstract
Lysosomal acid lipase (LAL) is the sole enzyme known to be responsible for the hydrolysis of cholesteryl esters and triglycerides at an acidic pH in lysosomes, resulting in the release of unesterified cholesterol and free fatty acids. However, the role of LAL in diet-induced adaptations is largely unexplored. In this study, we demonstrate that feeding a Western-type diet to Lal-deficient (LAL-KO) mice triggers metabolic reprogramming that modulates gut-liver cholesterol homeostasis. Induction of ileal fibroblast growth factor 15 (three-fold), absence of hepatic cholesterol 7α-hydroxylase expression, and activation of the ERK phosphorylation cascade results in altered bile acid composition, substantial changes in the gut microbiome, reduced nutrient absorption by 40%, and two-fold increased fecal lipid excretion in LAL-KO mice. These metabolic adaptations lead to impaired bile acid synthesis, lipoprotein uptake, and cholesterol absorption and ultimately to the resistance of LAL-KO mice to diet-induced obesity. Our results indicate that LAL-derived lipolytic products might be important metabolic effectors in the maintenance of whole-body lipid homeostasis.
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Affiliation(s)
- Vinay Sachdev
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria; (V.S.); (M.D.-M.); (M.K.); (N.V.); (C.L.); (S.R.); (B.R.)
| | - Madalina Duta-Mare
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria; (V.S.); (M.D.-M.); (M.K.); (N.V.); (C.L.); (S.R.); (B.R.)
| | - Melanie Korbelius
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria; (V.S.); (M.D.-M.); (M.K.); (N.V.); (C.L.); (S.R.); (B.R.)
| | - Nemanja Vujić
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria; (V.S.); (M.D.-M.); (M.K.); (N.V.); (C.L.); (S.R.); (B.R.)
| | - Christina Leopold
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria; (V.S.); (M.D.-M.); (M.K.); (N.V.); (C.L.); (S.R.); (B.R.)
| | - Jan Freark de Boer
- Department of Pediatrics, University Medical Center Groningen, 9713 Groningen, The Netherlands; (J.F.d.B.); (F.K.)
- Department of Laboratory Medicine, University Medical Center Groningen, 9713 Groningen, The Netherlands
| | - Silvia Rainer
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria; (V.S.); (M.D.-M.); (M.K.); (N.V.); (C.L.); (S.R.); (B.R.)
| | - Peter Fickert
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of Graz, 8010 Graz, Austria;
| | - Dagmar Kolb
- Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, 8010 Graz, Austria;
- Center for Medical Research Medical University of Graz, 8010 Graz, Austria
| | - Folkert Kuipers
- Department of Pediatrics, University Medical Center Groningen, 9713 Groningen, The Netherlands; (J.F.d.B.); (F.K.)
- Department of Laboratory Medicine, University Medical Center Groningen, 9713 Groningen, The Netherlands
| | - Branislav Radovic
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria; (V.S.); (M.D.-M.); (M.K.); (N.V.); (C.L.); (S.R.); (B.R.)
| | - Gregor Gorkiewicz
- Diagnostic and Research Institute of Pathology, Medical University of Graz, 8010 Graz, Austria;
| | - Dagmar Kratky
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria; (V.S.); (M.D.-M.); (M.K.); (N.V.); (C.L.); (S.R.); (B.R.)
- BioTechMed-Graz, 8010 Graz, Austria
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17
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Rugolo F, Bazan NG, Calandria J, Jun B, Raschellà G, Melino G, Agostini M. The expression of ELOVL4, repressed by MYCN, defines neuroblastoma patients with good outcome. Oncogene 2021; 40:5741-5751. [PMID: 34333551 DOI: 10.1038/s41388-021-01959-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 06/30/2021] [Accepted: 07/12/2021] [Indexed: 02/07/2023]
Abstract
Cancer cells exhibit dysregulation of critical genes including those involved in lipid biosynthesis, with subsequent defects in metabolism. Here, we show that ELOngation of Very Long chain fatty acids protein 4 (ELOVL4), a rate-limiting enzyme in the biosynthesis of very-long polyunsaturated fatty acids (n-3, ≥28 C), is expressed and transcriptionally repressed by the oncogene MYCN in neuroblastoma cells. In keeping, ELOVL4 positively regulates neuronal differentiation and lipids droplets accumulation in neuroblastoma cells. At the molecular level we found that MYCN binds to the promoter of ELOVL4 in close proximity to the histone deacetylases HDAC1, HDAC2, and the transcription factor Sp1 that can cooperate in the repression of ELOVL4 expression. Accordingly, in vitro differentiation results in an increase of fatty acid with 34 carbons with 6 double bonds (FA34:6); and when MYCN is silenced, FA34:6 metabolite is increased compared with the scrambled. In addition, analysis of large neuroblastoma datasets revealed that ELOVL4 expression is highly expressed in localized clinical stages 1 and 2, and low in high-risk stages 3 and 4. More importantly, high expression of ELOVL4 stratifies a subsets of neuroblastoma patients with good prognosis. Indeed, ELOVL4 expression is a marker of better overall clinical survival also in MYCN not amplified patients and in those with neuroblastoma-associated mutations. In summary, our findings indicate that MYCN, by repressing the expression of ELOVL4 and lipid metabolism, contributes to the progression of neuroblastoma.
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Affiliation(s)
- Francesco Rugolo
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy
| | - Nicolas G Bazan
- Neuroscience Center of Excellence, School of Medicine, Louisiana State University Health New Orleans, New Orleans, LA, USA
| | - Jorgelina Calandria
- Neuroscience Center of Excellence, School of Medicine, Louisiana State University Health New Orleans, New Orleans, LA, USA
| | - Bokkyoo Jun
- Neuroscience Center of Excellence, School of Medicine, Louisiana State University Health New Orleans, New Orleans, LA, USA
| | - Giuseppe Raschellà
- Laboratory of Health and Environment, Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Rome, Italy
| | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy.
| | - Massimiliano Agostini
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, Rome, Italy.
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18
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Bian X, Liu R, Meng Y, Xing D, Xu D, Lu Z. Lipid metabolism and cancer. J Exp Med 2021; 218:211616. [PMID: 33601415 PMCID: PMC7754673 DOI: 10.1084/jem.20201606] [Citation(s) in RCA: 362] [Impact Index Per Article: 120.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/15/2020] [Accepted: 10/26/2020] [Indexed: 02/05/2023] Open
Abstract
Dysregulation in lipid metabolism is among the most prominent metabolic alterations in cancer. Cancer cells harness lipid metabolism to obtain energy, components for biological membranes, and signaling molecules needed for proliferation, survival, invasion, metastasis, and response to the tumor microenvironment impact and cancer therapy. Here, we summarize and discuss current knowledge about the advances made in understanding the regulation of lipid metabolism in cancer cells and introduce different approaches that have been clinically used to disrupt lipid metabolism in cancer therapy.
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Affiliation(s)
- Xueli Bian
- Cancer Institute of The Affiliated Hospital of Qingdao University and Qingdao Cancer Institute, Qingdao, China
| | - Rui Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ying Meng
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, and Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
| | - Dongming Xing
- Cancer Institute of The Affiliated Hospital of Qingdao University and Qingdao Cancer Institute, Qingdao, China.,School of Life Sciences, Tsinghua University, Beijing, China
| | - Daqian Xu
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, and Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhimin Lu
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, and Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Zhejiang University Cancer Center, Hangzhou, China
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19
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Bel’skaya LV, Sarf EA, Kosenok VK. Analysis of Saliva Lipids in Breast and Prostate Cancer by IR Spectroscopy. Diagnostics (Basel) 2021; 11:1325. [PMID: 34441260 PMCID: PMC8394871 DOI: 10.3390/diagnostics11081325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 12/26/2022] Open
Abstract
We have developed a method for studying the lipid profile of saliva, combining preliminary extraction and IR spectroscopic detection. The case-control study involved patients with a histologically verified diagnosis of breast and prostate cancer and healthy volunteers. The comparison group included patients with non-malignant pathologies of the breast (fibroadenomas) and prostate gland (prostatic intraepithelial neoplasia). Saliva was used as a material for biochemical studies. It has been shown that the lipid profile of saliva depends on gender, and for males it also depends on the age group. In cancer pathologies, the lipid profile changes significantly and also depends on gender and age characteristics. The ratio of 1458/1396 cm-1 for both breast and prostate cancer has a potential diagnostic value. In both cases, this ratio decreases compared to healthy controls. For prostate cancer, the ratio of 2923/2957 cm-1 is also potentially informative, which grows against the background of prostate pathologies. It is noted that, in all cases, changes in the proposed ratios are more pronounced in the early stages of diseases, which increases the relevance of their study in biomedical applications.
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Affiliation(s)
- Lyudmila V. Bel’skaya
- Biochemistry Research Laboratory, Omsk State Pedagogical University, 644099 Omsk, Russia;
| | - Elena A. Sarf
- Biochemistry Research Laboratory, Omsk State Pedagogical University, 644099 Omsk, Russia;
| | - Victor K. Kosenok
- Department of Oncology, Omsk State Medical University, 644099 Omsk, Russia;
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20
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Ethanol extract of Ardisiae Japonicae Herba inhibits hepatoma carcinoma cell proliferation in vitro through regulating lipid metabolism. CHINESE HERBAL MEDICINES 2021; 13:410-415. [PMID: 36118924 PMCID: PMC9476705 DOI: 10.1016/j.chmed.2021.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/16/2020] [Accepted: 01/25/2021] [Indexed: 12/21/2022] Open
Abstract
Objective The aim of this study is to discover the possible working mechanisms of Ardisiae Japonicae Herba (AJH) on hepatoma carcinoma (HCC). Methods In this study, ethanol extract of AJH was prepared and used to treat HCC cell in vitro. Furthermore, a genomic wide RNA sequencing (RNA-seq) was performed to screen deregulated genes in HCC cells after the treatment of AJH extract. The gene and protein expression related to lipid metabolism in HCC cells were also investigated to validate the results obtained from RNA-seq. Results AJH extract could inhibit HCC cell proliferation in vitro. RNA-seq analysis has identified 1,601 differentially expressed genes (DEGs, fold change ≥ 2.0 or fold change ≤ 0.5, P < 0.05) in HCC after AJH extract treatment, which included 225 up-regulated genes and 1,376 down-regulated genes. KEGG pathway analysis of DEGs demonstrated that lipid metabolism was a potential pathway related to AJH treatment. In agreement with the RNA-seq data, qPCR and Western-blot analysis indicated that expression of genes and proteins related to lipid metabolism (SREBP1, ACC, ACLY and FASN) were significantly down-regulated in AJH treatment group as compared with the control group. Furthermore, AJH extract could also decrease lipid contents and cellular free fatty acid levels in HCC cells. Conclusion Ethanol extract of AJH could inhibit HCC cell proliferation in vitro, the possible mechanism may be related to the inhibition of lipid metabolism.
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21
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Toledo EM, Yang S, Gyllborg D, van Wijk KE, Sinha I, Varas-Godoy M, Grigsby CL, Lönnerberg P, Islam S, Steffensen KR, Linnarsson S, Arenas E. Srebf1 Controls Midbrain Dopaminergic Neurogenesis. Cell Rep 2021; 31:107601. [PMID: 32375051 DOI: 10.1016/j.celrep.2020.107601] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 02/17/2020] [Accepted: 04/10/2020] [Indexed: 12/20/2022] Open
Abstract
Liver X receptors (LXRs) and their ligands are potent regulators of midbrain dopaminergic (mDA) neurogenesis and differentiation. However, the molecular mechanisms by which LXRs control these functions remain to be elucidated. Here, we perform a combined transcriptome and chromatin immunoprecipitation sequencing (ChIP-seq) analysis of midbrain cells after LXR activation, followed by bioinformatic analysis to elucidate the transcriptional networks controlling mDA neurogenesis. Our results identify the basic helix-loop-helix transcription factor sterol regulatory element binding protein 1 (SREBP1) as part of a cluster of proneural transcription factors in radial glia and as a regulator of transcription factors controlling mDA neurogenesis, such as Foxa2. Moreover, loss- and gain-of-function experiments in vitro and in vivo demonstrate that Srebf1 is both required and sufficient for mDA neurogenesis. Our data, thus, identify Srebf1 as a central player in mDA neurogenesis.
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Affiliation(s)
- Enrique M Toledo
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Shanzheng Yang
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Daniel Gyllborg
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Kim E van Wijk
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Indranil Sinha
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Manuel Varas-Godoy
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Christopher L Grigsby
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden; Division of Biomaterials, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Peter Lönnerberg
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Saiful Islam
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Knut R Steffensen
- Department of Laboratory Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Sten Linnarsson
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden
| | - Ernest Arenas
- Laboratory for Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Biomedicum, Solnavägen 9, 17177 Stockholm, Sweden.
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22
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Shin S, Zhou H, He C, Wei Y, Wang Y, Shingu T, Zeng A, Wang S, Zhou X, Li H, Zhang Q, Mo Q, Long J, Lan F, Chen Y, Hu J. Qki activates Srebp2-mediated cholesterol biosynthesis for maintenance of eye lens transparency. Nat Commun 2021; 12:3005. [PMID: 34021134 PMCID: PMC8139980 DOI: 10.1038/s41467-021-22782-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 03/23/2021] [Indexed: 02/04/2023] Open
Abstract
Defective cholesterol biosynthesis in eye lens cells is often associated with cataracts; however, how genes involved in cholesterol biosynthesis are regulated in lens cells remains unclear. Here, we show that Quaking (Qki) is required for the transcriptional activation of genes involved in cholesterol biosynthesis in the eye lens. At the transcriptome level, lens-specific Qki-deficient mice present downregulation of genes associated with the cholesterol biosynthesis pathway, resulting in a significant reduction of total cholesterol level in the eye lens. Mice with Qki depletion in lens epithelium display progressive accumulation of protein aggregates, eventually leading to cataracts. Notably, these defects are attenuated by topical sterol administration. Mechanistically, we demonstrate that Qki enhances cholesterol biosynthesis by recruiting Srebp2 and Pol II in the promoter regions of cholesterol biosynthesis genes. Supporting its function as a transcription co-activator, we show that Qki directly interacts with single-stranded DNA. In conclusion, we propose that Qki-Srebp2-mediated cholesterol biosynthesis is essential for maintaining the cholesterol level that protects lens from cataract development.
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Affiliation(s)
- Seula Shin
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Cancer Biology Program, MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA
| | - Hao Zhou
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Science, College of Life Sciences, Nankai University, Tianjin, China
| | - Chenxi He
- Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, and Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yanjun Wei
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Yunfei Wang
- Clinical Science Division, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, USA
| | - Takashi Shingu
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ailiang Zeng
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Shaobo Wang
- Department of Neurosurgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Xin Zhou
- Cancer Research Institute of Jilin University, The First Hospital of Jilin University, Jilin, China
| | - Hongtao Li
- Department of Oncology, Affiliated Sixth People's Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Qiang Zhang
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Qinling Mo
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Science, College of Life Sciences, Nankai University, Tianjin, China
| | - Jiafu Long
- State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Science, College of Life Sciences, Nankai University, Tianjin, China
| | - Fei Lan
- Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, and Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yiwen Chen
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jian Hu
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
- Cancer Biology Program, MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA.
- Neuroscience Program, MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, USA.
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23
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Moldavski O, Zushin PJH, Berdan CA, Van Eijkeren RJ, Jiang X, Qian M, Ory DS, Covey DF, Nomura DK, Stahl A, Weiss EJ, Zoncu R. 4β-Hydroxycholesterol is a prolipogenic factor that promotes SREBP1c expression and activity through the liver X receptor. J Lipid Res 2021; 62:100051. [PMID: 33631213 PMCID: PMC8042401 DOI: 10.1016/j.jlr.2021.100051] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/06/2021] [Accepted: 02/12/2021] [Indexed: 12/16/2022] Open
Abstract
Oxysterols are oxidized derivatives of cholesterol that play regulatory roles in lipid biosynthesis and homeostasis. How oxysterol signaling coordinates different lipid classes such as sterols and triglycerides remains incompletely understood. Here, we show that 4β-hydroxycholesterol (HC) (4β-HC), a liver and serum abundant oxysterol of poorly defined functions, is a potent and selective inducer of the master lipogenic transcription factor, SREBP1c, but not the related steroidogenic transcription factor SREBP2. By correlating tracing of lipid synthesis with lipogenic gene expression profiling, we found that 4β-HC acts as a putative agonist for the liver X receptor (LXR), a sterol sensor and transcriptional regulator previously linked to SREBP1c activation. Unique among the oxysterol agonists of the LXR, 4β-HC induced expression of the lipogenic program downstream of SREBP1c and triggered de novo lipogenesis both in primary hepatocytes and in the mouse liver. In addition, 4β-HC acted in parallel to insulin-PI3K-dependent signaling to stimulate triglyceride synthesis and lipid-droplet accumulation. Thus, 4β-HC is an endogenous regulator of de novo lipogenesis through the LXR-SREBP1c axis.
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Affiliation(s)
- Ofer Moldavski
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA, USA; The Paul F. Glenn Center for Aging Research, University of California, Berkeley, Berkeley, CA, USA; Cardiovascular Research Institute, UCSF, San Francisco, CA, USA
| | - Peter-James H Zushin
- Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA, USA
| | - Charles A Berdan
- Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA, USA
| | - Robert J Van Eijkeren
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA, USA; The Paul F. Glenn Center for Aging Research, University of California, Berkeley, Berkeley, CA, USA
| | - Xuntian Jiang
- Diabetic Cardiovascular Disease Center, Washington University School of Medicine, St Louis, MO, USA
| | - Mingxing Qian
- Department of Developmental Biology, Washington University School of Medicine, St Louis, MO, USA
| | - Daniel S Ory
- Diabetic Cardiovascular Disease Center, Washington University School of Medicine, St Louis, MO, USA
| | - Douglas F Covey
- Department of Developmental Biology, Washington University School of Medicine, St Louis, MO, USA
| | - Daniel K Nomura
- Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA, USA
| | - Andreas Stahl
- Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA, USA
| | - Ethan J Weiss
- Cardiovascular Research Institute, UCSF, San Francisco, CA, USA
| | - Roberto Zoncu
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA, USA; The Paul F. Glenn Center for Aging Research, University of California, Berkeley, Berkeley, CA, USA.
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24
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Identification, Classification, and Expression Analysis of the Triacylglycerol Lipase ( TGL) Gene Family Related to Abiotic Stresses in Tomato. Int J Mol Sci 2021; 22:ijms22031387. [PMID: 33573234 PMCID: PMC7866549 DOI: 10.3390/ijms22031387] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/23/2021] [Accepted: 01/26/2021] [Indexed: 11/25/2022] Open
Abstract
Triacylglycerol Lipases (TGLs) are the major enzymes involved in triacylglycerol catabolism. TGLs hydrolyze long-chain fatty acid triglycerides, which are involved in plant development and abiotic stress responses. Whereas most studies of TGLs have focused on seed oil metabolism and biofuel in plants, limited information is available regarding the genome-wide identification and characterization of the TGL gene family in tomato (Solanum lycopersicum L.). Based on the latest published tomato genome annotation ITAG4.0, 129 SlTGL genes were identified and classified into 5 categories according to their structural characteristics. Most SlTGL genes were distributed on 3 of 12 chromosomes. Segment duplication appeared to be the driving force underlying expansion of the TGL gene family in tomato. The promoter analysis revealed that the promoters of SlTGLs contained many stress responsiveness cis-elements, such as ARE, LTR, MBS, WRE3, and WUN-motifs. Expression of the majority of SlTGL genes was suppressed following exposure to chilling and heat, while it was induced under drought stress, such as SlTGLa9, SlTGLa6, SlTGLa25, SlTGLa26, and SlTGLa13. These results provide valuable insights into the roles of the SlTGL genes family and lay a foundation for further functional studies on the linkage between triacylglycerol catabolism and abiotic stress responses in tomato.
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25
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Lange Y, Steck TL. Active cholesterol 20 years on. Traffic 2020; 21:662-674. [PMID: 32930466 DOI: 10.1111/tra.12762] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/08/2020] [Accepted: 09/10/2020] [Indexed: 12/13/2022]
Abstract
This review considers the following hypotheses, some well-supported and some speculative. Almost all of the sterol molecules in plasma membranes are associated with bilayer phospholipids in complexes of varied strength and stoichiometry. These complexes underlie many of the material properties of the bilayer. The small fraction of cholesterol molecules exceeding the binding capacity of the phospholipids is thermodynamically active and serves diverse functions. It circulates briskly among the cell membranes, particularly through contact sites linking the organelles. Active cholesterol provides the upstream feedback signal to multiple mechanisms governing plasma membrane homeostasis, pegging the sterol level to a threshold set by its phospholipids. Active cholesterol could also be the cargo for various inter-organelle transporters and the form excreted from cells by reverse transport. Furthermore, it is integral to the function of caveolae; a mediator of Hedgehog regulation; and a ligand for the binding of cytolytic toxins to membranes. Active cholesterol modulates a variety of plasma membrane proteins-receptors, channels and transporters-at least in vitro.
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Affiliation(s)
- Yvonne Lange
- Department of Pathology, Rush University Medical Center, Chicago, Illinois, USA
| | - Theodore L Steck
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois, USA
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26
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McCuaig LM, Martyniuk CJ, Marlatt VL. Morphometric and proteomic responses of early-life stage rainbow trout (Oncorhynchus mykiss) to the aquatic herbicide diquat dibromide. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2020; 222:105446. [PMID: 32092595 DOI: 10.1016/j.aquatox.2020.105446] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 02/07/2020] [Accepted: 02/11/2020] [Indexed: 06/10/2023]
Abstract
The objective of this study was to examine the acute toxicity and sub-lethal effects of the commercial formulation of diquat dibromide, Reward® Landscape and Aquatic Herbicide, on multiple life stages of rainbow trout. The continuous exposure 96 h LC50 derived for juvenile feeding fry aged 85 d post-hatch was 9.8 mg/L. Rainbow trout eyed embryos and juvenile feeding fry were also exposed to concentrations of Reward® ranging from 0.12 to 10 mg/L during two 24 h pulse exposures separated by 14 d of rearing in fresh water to mimic the manufacturers instructions for direct applications to water bodies. Decreased survival and body morphometrics were evident at 9.3 mg/L during the embryo/alevin exposures, but not in feeding juveniles, indicating a higher sensitivity of the early life stage fish. Quantitative proteomics and subnetwork enrichment analyses were conducted in the livers for both life stages to evaluate protein profiles after exposure to 0.37 mg/L diquat via Reward® exposure. Unique protein profiles were revealed for pre-feeding swim-up fry and for feeding juvenile fish, reflecting differences between the two life stages in sub-cellular responses after diquat dibromide exposure. Hepatic proteome effects were more dramatic in the pre-feeding swim-up fry with 315 proteins differentially expressed between the control and exposed fish while in the later life stage feeding fry, only 84 proteins were different after Reward® exposure. Exposure to Reward® significantly increased RNA/mRNA processes, induced activation of Atk/mTOR and caspase activity, and altered energy homeostasis. Proteomic alterations are associated with reduced growth observed in embryo/alevin at higher exposure concentrations, offering insight into key events underlying growth impairment within the adverse outcome pathway framework. This study is the first to report the sub-cellular and whole organism level effects of diquat dibromide in a commercial formulation and demonstrates that concentrations based on aquatic application rates alter the hepatic proteome.
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Affiliation(s)
- Lisa M McCuaig
- Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada.
| | - Christopher J Martyniuk
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, USA
| | - Vicki Lee Marlatt
- Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
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27
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Tonini C, Colardo M, Colella B, Di Bartolomeo S, Berardinelli F, Caretti G, Pallottini V, Segatto M. Inhibition of Bromodomain and Extraterminal Domain (BET) Proteins by JQ1 Unravels a Novel Epigenetic Modulation to Control Lipid Homeostasis. Int J Mol Sci 2020; 21:ijms21041297. [PMID: 32075110 PMCID: PMC7072965 DOI: 10.3390/ijms21041297] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/08/2020] [Accepted: 02/13/2020] [Indexed: 12/19/2022] Open
Abstract
The homeostatic control of lipid metabolism is essential for many fundamental physiological processes. A deep understanding of its regulatory mechanisms is pivotal to unravel prospective physiopathological factors and to identify novel molecular targets that could be employed to design promising therapies in the management of lipid disorders. Here, we investigated the role of bromodomain and extraterminal domain (BET) proteins in the regulation of lipid metabolism. To reach this aim, we used a loss-of-function approach by treating HepG2 cells with JQ1, a powerful and selective BET inhibitor. The main results demonstrated that BET inhibition by JQ1 efficiently decreases intracellular lipid content, determining a significant modulation of proteins involved in lipid biosynthesis, uptake and intracellular trafficking. Importantly, the capability of BET inhibition to slow down cell proliferation is dependent on the modulation of cholesterol metabolism. Taken together, these data highlight a novel epigenetic mechanism involved in the regulation of lipid homeostasis.
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Affiliation(s)
- Claudia Tonini
- Department of Science, University of Rome “Roma Tre”, Viale Marconi 446, 00146 Rome, Italy; (C.T.); (F.B.); (V.P.)
| | - Mayra Colardo
- Department of Bioscience and Territory, University of Molise, Contrada Fonte Lappone, 86090 Pesche (Is), Italy; (M.C.); (B.C.); (S.D.B.)
| | - Barbara Colella
- Department of Bioscience and Territory, University of Molise, Contrada Fonte Lappone, 86090 Pesche (Is), Italy; (M.C.); (B.C.); (S.D.B.)
| | - Sabrina Di Bartolomeo
- Department of Bioscience and Territory, University of Molise, Contrada Fonte Lappone, 86090 Pesche (Is), Italy; (M.C.); (B.C.); (S.D.B.)
| | - Francesco Berardinelli
- Department of Science, University of Rome “Roma Tre”, Viale Marconi 446, 00146 Rome, Italy; (C.T.); (F.B.); (V.P.)
| | - Giuseppina Caretti
- Department of Biosciences, University of Milan, Via Celoria 26, 20133 Milan, Italy;
| | - Valentina Pallottini
- Department of Science, University of Rome “Roma Tre”, Viale Marconi 446, 00146 Rome, Italy; (C.T.); (F.B.); (V.P.)
| | - Marco Segatto
- Department of Bioscience and Territory, University of Molise, Contrada Fonte Lappone, 86090 Pesche (Is), Italy; (M.C.); (B.C.); (S.D.B.)
- Correspondence:
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28
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Snaebjornsson MT, Janaki-Raman S, Schulze A. Greasing the Wheels of the Cancer Machine: The Role of Lipid Metabolism in Cancer. Cell Metab 2020; 31:62-76. [PMID: 31813823 DOI: 10.1016/j.cmet.2019.11.010] [Citation(s) in RCA: 490] [Impact Index Per Article: 122.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 10/27/2019] [Accepted: 11/12/2019] [Indexed: 12/12/2022]
Abstract
Altered lipid metabolism is among the most prominent metabolic alterations in cancer. Enhanced synthesis or uptake of lipids contributes to rapid cancer cell growth and tumor formation. Lipids are a highly complex group of biomolecules that not only constitute the structural basis of biological membranes but also function as signaling molecules and an energy source. Here, we summarize recent evidence implicating altered lipid metabolism in different aspects of the cancer phenotype and discuss potential strategies by which targeting lipid metabolism could provide a therapeutic window for cancer treatment.
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Affiliation(s)
- Marteinn Thor Snaebjornsson
- Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Am Hubland, 97074 Würzburg, Germany; Division of Tumor Metabolism and Microenvironment, German Cancer Research Center, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany.
| | - Sudha Janaki-Raman
- Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Am Hubland, 97074 Würzburg, Germany.
| | - Almut Schulze
- Biochemistry and Molecular Biology, Theodor-Boveri-Institute, Biocenter, Am Hubland, 97074 Würzburg, Germany; Division of Tumor Metabolism and Microenvironment, German Cancer Research Center, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany.
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29
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Luise D, Bovo S, Bosi P, Fanelli F, Pagotto U, Galimberti G, Mazzoni G, Dall'Olio S, Fontanesi L. Targeted metabolomic profiles of piglet plasma reveal physiological changes over the suckling period. Livest Sci 2020. [DOI: 10.1016/j.livsci.2019.103890] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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30
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Beltrán-Heredia E, Monroy F, Cao-García FJ. Mechanical conditions for stable symmetric cell constriction. Phys Rev E 2019; 100:052408. [PMID: 31869912 DOI: 10.1103/physreve.100.052408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Indexed: 11/07/2022]
Abstract
Cell constriction is a decisive step for division in many cells. However, its physical pathway remains poorly understood, calling for a quantitative analysis of the forces required in different cytokinetic scenarios. Using a model cell composed by a flexible membrane (actin cortex and cell membrane) that encloses the cytoplasm, we study the mechanical conditions necessary for stable symmetric constriction under radial equatorial forces using analytical and numerical methods. We deduce that stable symmetric constriction requires positive effective spontaneous curvature, while spontaneous constriction requires a spontaneous curvature higher than the characteristic inverse cell size. Surface tension reduction (for example by actin cortex growth and membrane trafficking) increases the stability and spontaneity of cellular constriction. A reduction of external pressure also increases stability and spontaneity. Cells with prolate lobes (elongated cells) require lower stabilization forces than oblate-shaped cells (discocytes). We also show that the stability and spontaneity of symmetric constriction increase as constriction progresses. Our quantitative results settle the physical requirements for stable cytokinesis, defining a quantitative framework to analyze the mechanical role of the different constriction machinery and cytokinetic pathways found in real cells, so contributing to a deeper quantitative understanding of the physical mechanism of the cell division process.
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Affiliation(s)
- Elena Beltrán-Heredia
- Departamento de Estructura de la Materia, Física Térmica, y Electrónica, Universidad Complutense de Madrid, Plaza de Ciencias 1, 28040 Madrid, Spain.,Departamento de Química Física, Universidad Complutense de Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
| | - Francisco Monroy
- Departamento de Química Física, Universidad Complutense de Madrid, Avenida Complutense s/n, 28040 Madrid, Spain.,Unit of Translational Biophysics, Instituto de Investigación Sanitaria Hospital Doce de Octubre (imas12), Avenida de Cordoba s/n, 28041 Madrid, Spain
| | - Francisco J Cao-García
- Departamento de Estructura de la Materia, Física Térmica, y Electrónica, Universidad Complutense de Madrid, Plaza de Ciencias 1, 28040 Madrid, Spain.,IMDEA Nanociencia, Calle Faraday 9, 28049 Madrid, Spain
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31
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Korshunov DA, Kondakova IV, Shashova EE. Modern Perspective on Metabolic Reprogramming in Malignant Neoplasms. BIOCHEMISTRY (MOSCOW) 2019; 84:1129-1142. [PMID: 31694509 DOI: 10.1134/s000629791910002x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Metabolic reprogramming is one of the central features of transformed cells. Elucidation of interactions between oncogenic signaling and cell metabolic processes has become the basis for extensive studies of metabolism reprogramming in tumor tissue. The review summarizes the key results of studies on the catabolic and anabolic rearrangements in tumor cells with special emphasis on carbohydrate, lipid, amino acid, and acetate metabolism determining the cancer phenotype of cells.
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Affiliation(s)
- D A Korshunov
- Tomsk National Research Medical Center, Tomsk, 634009, Russia.
| | - I V Kondakova
- Tomsk National Research Medical Center, Tomsk, 634009, Russia
| | - E E Shashova
- Tomsk National Research Medical Center, Tomsk, 634009, Russia
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32
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Lipid Metabolism at the Nexus of Diet and Tumor Microenvironment. Trends Cancer 2019; 5:693-703. [PMID: 31735288 DOI: 10.1016/j.trecan.2019.09.007] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/24/2019] [Accepted: 09/26/2019] [Indexed: 12/27/2022]
Abstract
Obesity is a leading contributing factor to cancer development worldwide. Epidemiological evidence suggests that diet affects cancer risk and also substantially alters therapeutic outcome. Therefore, studying the impact of diet in the development and treatment of cancer should be a clinical priority. In this Review, we set out the evidence supporting the role of lipid metabolism in shaping the tumor microenvironment (TME) and cancer cell phenotype. We will discuss how dietary lipids can impact phenotype thereby affecting disease trajectory and treatment response. Finally, we will posit potential strategies on how this knowledge can be exploited to increase treatment efficacy and patient survival.
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33
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Sharma G, Tripathi SK, Das S. lncRNA HULC facilitates efficient loading of HCV-core protein onto lipid droplets and subsequent virus-particle release. Cell Microbiol 2019; 21:e13086. [PMID: 31290220 DOI: 10.1111/cmi.13086] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 06/29/2019] [Accepted: 07/07/2019] [Indexed: 12/11/2022]
Abstract
The cellular lipid pool plays a central role in hepatitis C virus (HCV) life cycle, from establishing infection to virus propagation. Here, we show that a liver abundant long noncoding RNA, highly upregulated in liver carcinoma (HULC), is upregulated during HCV infection and manipulates the lipid pool to favour virus life cycle. Interestingly, HULC was found to be crucial for the increase in number of lipid droplets in infected cells. This effect was attributed to the role of HULC in lipid biogenesis. Further, we demonstrated that HULC knockdown decreases the association of HCV-core protein with lipid droplets. This exhibited a direct consequence on the release of HCV particles. The role of HULC in HCV-particle release was further substantiated by additional knockdown and mutation experiments. Additionally, we found that increased level of HULC in HCV-infected cells was a result of Retinoid X Receptor Alpha (RXRA)-mediated transcription, which seemed to be aided by HCV-core protein. Taken together, the results identify a distinct role of long noncoding RNA HULC in lipid dynamics during HCV infection, which provides new insights into the complex process of HCV propagation and pathogenesis.
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Affiliation(s)
- Geetika Sharma
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Sachin Kumar Tripathi
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Saumitra Das
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India.,National Institute of Biomedical Genomics, Kalyani, India
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34
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Jiao H, Yin Y, Liu Z. Structures of the Mitochondrial CDP-DAG Synthase Tam41 Suggest a Potential Lipid Substrate Pathway from Membrane to the Active Site. Structure 2019; 27:1258-1269.e4. [PMID: 31178220 DOI: 10.1016/j.str.2019.04.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 03/14/2019] [Accepted: 04/29/2019] [Indexed: 11/18/2022]
Abstract
In mitochondria, CDP-diacylglycerol (CDP-DAG) is a crucial precursor for cardiolipin biosynthesis. Mitochondrial CDP-DAG is synthesized by the translocator assembly and maintenance protein 41 (Tam41) through an elusive process. Here we show that Tam41 adopts sequential catalytic mechanism, and report crystal structures of the bulk N-terminal region of Tam41 from Schizosaccharomyces pombe in the apo and CTP-bound state. The structure reveals that Tam41 contains a nucleotidyltransferase (NTase) domain and a winged helix domain. CTP binds to an "L"-shaped pocket sandwiched between the two domains. Rearrangement of a loop region near the active site is essential for opening the CTP-binding pocket. Docking of phosphatidic acid/CDP-DAG in the structure suggests a lipid entry/exit pathway connected to the "L"-shaped pocket. The C-terminal region of SpTam41 contains a positively charged amphipathic helix crucial for membrane association and participates in binding phospholipids. These results provide detailed insights into the mechanism of CDP-DAG biosynthesis in mitochondria.
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Affiliation(s)
- Haizhan Jiao
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, No. 15 Datun Road, Beijing 100101, China; University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Beijing 100049, China
| | - Yan Yin
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, No. 15 Datun Road, Beijing 100101, China; University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Beijing 100049, China
| | - Zhenfeng Liu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, No. 15 Datun Road, Beijing 100101, China; University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Beijing 100049, China.
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35
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A Model of Hereditary Sensory and Autonomic Neuropathy Type 1 Reveals a Role of Glycosphingolipids in Neuronal Polarity. J Neurosci 2019; 39:5816-5834. [PMID: 31138658 DOI: 10.1523/jneurosci.2541-18.2019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 05/15/2019] [Accepted: 05/19/2019] [Indexed: 12/14/2022] Open
Abstract
Hereditary sensory and autonomic neuropathy Type 1 (HSAN1) is a rare autosomal dominantly inherited neuropathy, clinically characterized by a loss of distal peripheral sensory and motoneuronal function. Mutations in subunits of serine palmitoyltransferase (SPT) have been linked to the majority of HSAN1 cases. SPTs catalyze the condensation of l-serine with palmitoyl-CoA, the first committed and rate-limiting step in de novo sphingolipid biosynthesis. Despite extensive investigation, the molecular pathogenesis of HSAN1 remains controversial. Here, we established a Caenorhabditis elegans (C. elegans) model of HSAN1 by generating a sptl-1(c363g) mutation, encoding SPTL-1(C121W) and equivalent to human SPTLC1C133W, at the C. elegans genomic locus through CRISPR. The sptl-1(c363g) homozygous mutants exhibited the same larval lethality and epithelial polarity defect as observed in sptl-1(RNAi) animals, suggesting a loss-of-function effect of the SPTL-1(C121W) mutation. sptl-1(c363g)/+ heterozygous mutants displayed sensory dysfunction with concomitant neuronal morphology and axon-dendrite polarity defects, demonstrating that the C. elegans model recapitulates characteristics of the human disease. sptl-1(c363g)-derived neuronal defects were copied in animals with defective sphingolipid biosynthetic enzymes downstream of SPTL-1, including ceramide glucosyltransferases, suggesting that SPTLC1C133W contributes to the HSAN1 pathogenesis by limiting the production of complex sphingolipids, including glucosylceramide. Overexpression of SPTL-1(C121W) led to similar epithelial and neuronal defects and to reduced levels of complex sphingolipids, specifically glucosylceramide, consistent with a dominant-negative effect of SPTL-1(C121W) that is mediated by loss of this downstream product. Genetic interactions between SPTL-1(C121W) and components of directional trafficking in neurons suggest that the neuronal polarity phenotype could be caused by glycosphingolipid-dependent defects in polarized vesicular trafficking.SIGNIFICANCE STATEMENT The symptoms of inherited metabolic diseases are often attributed to the accumulation of toxic intermediates or byproducts, no matter whether the disease-causing enzyme participates in a biosynthetic or a degradation pathway. By showing that the phenotypes observed in a C. elegans model of HSAN1 disease could be caused by loss of a downstream product (glucosylceramide) rather than the accumulation of a toxic byproduct, our work provides new insights into the origins of the symptoms of inherited metabolic diseases while expanding the repertoire of sphingolipid functions, specifically, of glucosylceramides. These findings not only have their most immediate relevance for neuroprotective treatments for HSAN1, they may also have implications for a much broader range of neurologic conditions.
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36
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Corton JC. Frequent Modulation of the Sterol Regulatory Element Binding Protein (SREBP) by Chemical Exposure in the Livers of Rats. ACTA ACUST UNITED AC 2019; 10:113-129. [PMID: 30931410 DOI: 10.1016/j.comtox.2019.01.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Inappropriate activation of sterol regulatory element-binding proteins (SREBPs) can lead to non-alcoholic fatty liver disease (NAFLD). To link chemical exposure to SREBP activity, a previously characterized gene expression biomarker (Rooney et al., 2019) was used to identify microarray comparisons from rat liver that exhibited significant positive or negative correlation to the biomarker. The effects of 620 chemicals on SREBP activity were examined across 9305 chemical-dose-time microarray comparisons. SREBP was found to be frequently modulated by chemical exposure with 54% of the chemicals affecting SREBP activity. Activators included inhibitors of cholesterogenesis that act to inhibit HMG-CoA reductase (statins) or inhibit Cyp51 (conazoles). Most chemical effects were transient, lasting usually no more than 2-4 days. Modulation of SREBP in most cases led to coordinated increases or decreases in lipogenic and cholesterogenic genes. However, 570 chemical exposure conditions were identified in which regulation was uncoupled. Most of these conditions affected cholesterogenic genes in the absence of parallel effects on lipogenic genes. Together, these findings show that SREBP is a frequent target of chemical exposure and expression of lipogenic and cholesterogenic genes can be uncoupled.
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Affiliation(s)
- J Christopher Corton
- Integrated Systems Toxicology Division, NHEERL/ORD, US-EPA, Research Triangle Park, NC 27711
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37
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Abstract
Bioactive lipids are essential components of human cells and tissues. As discussed in this review, the cancer lipidome is diverse and malleable, with the ability to promote or inhibit cancer pathogenesis. Targeting lipids within the tumor and surrounding microenvironment may be a novel therapeutic approach for treating cancer patients. Additionally, the emergence of a novel super-family of lipid mediators termed specialized pro-resolving mediators (SPMs) has revealed a new role for bioactive lipid mediators in the resolution of inflammation in cancer biology. The role of SPMs in cancer holds great promise in our understanding of cancer pathogenesis and can ultimately be used in future cancer diagnostics and therapy.
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Affiliation(s)
- Megan L Sulciner
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Allison Gartung
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Molly M Gilligan
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Charles N Serhan
- Department of Anesthesiology, Center for Experimental Therapeutics and Reperfusion Injury, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Dipak Panigrahy
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
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38
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Xu L, Chen J, Liu W, Liang C, Hu H, Huang J. Targeting androgen receptor-independent pathways in therapy-resistant prostate cancer. Asian J Urol 2019; 6:91-98. [PMID: 30775252 PMCID: PMC6363598 DOI: 10.1016/j.ajur.2018.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/23/2018] [Accepted: 10/29/2018] [Indexed: 12/13/2022] Open
Abstract
Since androgen receptor (AR) signaling is critically required for the development of prostate cancer (PCa), targeting AR axis has been the standard treatment of choice for advanced and metastatic PCa. Unfortunately, although the tumor initially responds to the therapy, treatment resistance eventually develops and the disease will progress. It is therefore imperative to identify the mechanisms of therapeutic resistance and novel molecular targets that are independent of AR signaling. Recent advances in pathology, molecular biology, genetics and genomics research have revealed novel AR-independent pathways that contribute to PCa carcinogenesis and progression. They include neuroendocrine differentiation, cell metabolism, DNA damage repair pathways and immune-mediated mechanisms. The development of novel agents targeting the non-AR mechanisms holds great promise to treat PCa that does not respond to AR-targeted therapies.
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Affiliation(s)
- Lingfan Xu
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA
| | - Junyi Chen
- Department of Urology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Weipeng Liu
- Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Chaozhao Liang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Hailiang Hu
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA
| | - Jiaoti Huang
- Department of Pathology, Duke University School of Medicine, Durham, NC, USA
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39
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Lim YT, Prabhu N, Dai L, Go KD, Chen D, Sreekumar L, Egeblad L, Eriksson S, Chen L, Veerappan S, Teo HL, Tan CSH, Lengqvist J, Larsson A, Sobota RM, Nordlund P. An efficient proteome-wide strategy for discovery and characterization of cellular nucleotide-protein interactions. PLoS One 2018; 13:e0208273. [PMID: 30521565 PMCID: PMC6283526 DOI: 10.1371/journal.pone.0208273] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 11/14/2018] [Indexed: 12/03/2022] Open
Abstract
Metabolite-protein interactions define the output of metabolic pathways and regulate many cellular processes. Although diseases are often characterized by distortions in metabolic processes, efficient means to discover and study such interactions directly in cells have been lacking. A stringent implementation of proteome-wide Cellular Thermal Shift Assay (CETSA) was developed and applied to key cellular nucleotides, where previously experimentally confirmed protein-nucleotide interactions were well recaptured. Many predicted, but never experimentally confirmed, as well as novel protein-nucleotide interactions were discovered. Interactions included a range of different protein families where nucleotides serve as substrates, products, co-factors or regulators. In cells exposed to thymidine, a limiting precursor for DNA synthesis, both dose- and time-dependence of the intracellular binding events for sequentially generated thymidine metabolites were revealed. Interactions included known cancer targets in deoxyribonucleotide metabolism as well as novel interacting proteins. This stringent CETSA based strategy will be applicable for a wide range of metabolites and will therefore greatly facilitate the discovery and studies of interactions and specificities of the many metabolites in human cells that remain uncharacterized.
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Affiliation(s)
- Yan Ting Lim
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Nayana Prabhu
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Lingyun Dai
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Ka Diam Go
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Dan Chen
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Lekshmy Sreekumar
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Louise Egeblad
- Department of Anatomy, Physiology and Biochemistry, The Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Staffan Eriksson
- Department of Oncology and Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Liyan Chen
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Saranya Veerappan
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Hsiang Ling Teo
- NTU Institute of Structural Biology, Nanyang Technological University, Singapore, Singapore
| | - Chris Soon Heng Tan
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Johan Lengqvist
- Department of Oncology and Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Andreas Larsson
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Radoslaw M. Sobota
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
- * E-mail: (PN); (RMS)
| | - Pär Nordlund
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- Department of Oncology and Pathology, Karolinska Institutet, Stockholm, Sweden
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
- * E-mail: (PN); (RMS)
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40
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Lipid-gene regulatory network reveals coregulations of triacylglycerol with phosphatidylinositol/lysophosphatidylinositol and with hexosyl-ceramide. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1864:168-180. [PMID: 30521938 DOI: 10.1016/j.bbalip.2018.11.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 11/22/2018] [Accepted: 11/30/2018] [Indexed: 01/21/2023]
Abstract
Lipid homeostasis is important for executing normal cellular functions and maintaining physiological conditions. The biophysical properties and intricate metabolic network of lipids underlie the coordinated regulation of different lipid species in lipid homeostasis. To reveal the homeostatic response among different lipids, we systematically knocked down 40 lipid metabolism genes in Drosophila S2 cells by RNAi and profiled the lipidomic changes. Clustering analyses of lipids reveal that many pairs of genes acting in a sequential fashion or sharing the same substrate are tightly clustered. Through a lipid-gene regulatory network analysis, we further found that a reduction of triacylglycerol (TAG) is associated with an increase of phosphatidylinositol (PI) and lysophosphatidylinositol (LPI) or a reduction of hexosyl-ceramide (HexCer) and hydroxylated hexosyl-ceramide (OH-HexCer). Importantly, negative coregulation between TAG and LPI/PI, and positive coregulation between TAG and HexCer, were also found in human Hela cells. Together, our results reveal coregulations of TAG with PI/LPI and with HexCer in lipid homeostasis.
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41
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Phospholipid synthesis fueled by lipid droplets drives the structural development of poliovirus replication organelles. PLoS Pathog 2018; 14:e1007280. [PMID: 30148882 PMCID: PMC6128640 DOI: 10.1371/journal.ppat.1007280] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 09/07/2018] [Accepted: 08/13/2018] [Indexed: 01/16/2023] Open
Abstract
Rapid development of complex membranous replication structures is a hallmark of picornavirus infections. However, neither the mechanisms underlying such dramatic reorganization of the cellular membrane architecture, nor the specific role of these membranes in the viral life cycle are sufficiently understood. Here we demonstrate that the cellular enzyme CCTα, responsible for the rate-limiting step in phosphatidylcholine synthesis, translocates from the nuclei to the cytoplasm upon infection and associates with the replication membranes, resulting in the rerouting of lipid synthesis from predominantly neutral lipids to phospholipids. The bulk supply of long chain fatty acids necessary to support the activated phospholipid synthesis in infected cells is provided by the hydrolysis of neutral lipids stored in lipid droplets. Such activation of phospholipid synthesis drives the massive membrane remodeling in infected cells. We also show that complex membranous scaffold of replication organelles is not essential for viral RNA replication but is required for protection of virus propagation from the cellular anti-viral response, especially during multi-cycle replication conditions. Inhibition of infection-specific phospholipid synthesis provides a new paradigm for controlling infection not by suppressing viral replication but by making it more visible to the immune system.
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42
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Intracellular and Plasma Membrane Events in Cholesterol Transport and Homeostasis. J Lipids 2018; 2018:3965054. [PMID: 30174957 PMCID: PMC6106919 DOI: 10.1155/2018/3965054] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 07/26/2018] [Indexed: 12/13/2022] Open
Abstract
Cholesterol transport between intracellular compartments proceeds by both energy- and non-energy-dependent processes. Energy-dependent vesicular traffic partly contributes to cholesterol flux between endoplasmic reticulum, plasma membrane, and endocytic vesicles. Membrane contact sites and lipid transfer proteins are involved in nonvesicular lipid traffic. Only “active" cholesterol molecules outside of cholesterol-rich regions and partially exposed in water phase are able to fast transfer. The dissociation of partially exposed cholesterol molecules in water determines the rate of passive aqueous diffusion of cholesterol out of plasma membrane. ATP hydrolysis with concomitant conformational transition is required to cholesterol efflux by ABCA1 and ABCG1 transporters. Besides, scavenger receptor SR-B1 is involved also in cholesterol efflux by facilitated diffusion via hydrophobic tunnel within the molecule. Direct interaction of ABCA1 with apolipoprotein A-I (apoA-I) or apoA-I binding to high capacity binding sites in plasma membrane is important in cholesterol escape to free apoA-I. ABCG1-mediated efflux to fully lipidated apoA-I within high density lipoprotein particle proceeds more likely through the increase of “active” cholesterol level. Putative cholesterol-binding linear motifs within the structure of all three proteins ABCA1, ABCG1, and SR-B1 are suggested to contribute to the binding and transfer of cholesterol molecules from cytoplasmic to outer leaflets of lipid bilayer. Together, plasma membrane events and intracellular cholesterol metabolism and traffic determine the capacity of the cell for cholesterol efflux.
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43
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Cheng C, Geng F, Cheng X, Guo D. Lipid metabolism reprogramming and its potential targets in cancer. Cancer Commun (Lond) 2018; 38:27. [PMID: 29784041 PMCID: PMC5993136 DOI: 10.1186/s40880-018-0301-4] [Citation(s) in RCA: 438] [Impact Index Per Article: 73.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 05/12/2018] [Indexed: 12/13/2022] Open
Abstract
Reprogramming of lipid metabolism is a newly recognized hallmark of malignancy. Increased lipid uptake, storage and lipogenesis occur in a variety of cancers and contribute to rapid tumor growth. Lipids constitute the basic structure of membranes and also function as signaling molecules and energy sources. Sterol regulatory element-binding proteins (SREBPs), a family of membrane-bound transcription factors in the endoplasmic reticulum, play a central role in the regulation of lipid metabolism. Recent studies have revealed that SREBPs are highly up-regulated in various cancers and promote tumor growth. SREBP cleavage-activating protein is a key transporter in the trafficking and activation of SREBPs as well as a critical glucose sensor, thus linking glucose metabolism and de novo lipid synthesis. Targeting altered lipid metabolic pathways has become a promising anti-cancer strategy. This review summarizes recent progress in our understanding of lipid metabolism regulation in malignancy, and highlights potential molecular targets and their inhibitors for cancer treatment.
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Affiliation(s)
- Chunming Cheng
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, Columbus, OH, 43210, USA
| | - Feng Geng
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, Columbus, OH, 43210, USA
| | - Xiang Cheng
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, Columbus, OH, 43210, USA
| | - Deliang Guo
- Department of Radiation Oncology, The Ohio State University James Comprehensive Cancer Center and College of Medicine, Columbus, OH, 43210, USA.
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44
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Galbraith L, Leung HY, Ahmad I. Lipid pathway deregulation in advanced prostate cancer. Pharmacol Res 2018; 131:177-184. [PMID: 29466694 DOI: 10.1016/j.phrs.2018.02.022] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 02/08/2018] [Accepted: 02/14/2018] [Indexed: 01/03/2023]
Abstract
The link between prostate cancer (PC) development and lipid metabolism is well established, with AR intimately involved in a number of lipogenic processes involving SREBP1, PPARG, FASN, ACC, ACLY and SCD1. Recently, there is growing evidence implicating the role of obesity and peri-prostatic adipose tissue (PPAT) in PC aggressiveness and related mortality, suggesting the importance of lipid pathways in both localised and disseminated disease. A number of promising agents are in development to target the lipogenic axis in PC, and the likelihood is that these agents will form part of combination drug strategies, with targeting of multiple metabolic pathways (e.g. FASN and CPT1), or in combination with AR pathway inhibitors (SCD1 and AR).
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Affiliation(s)
- Laura Galbraith
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, UK; Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
| | - Hing Y Leung
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, UK; Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
| | - Imran Ahmad
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, UK; Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK.
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45
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Lebeau P, Platko K, Al-Hashimi AA, Byun JH, Lhoták Š, Holzapfel N, Gyulay G, Igdoura SA, Cool DR, Trigatti B, Seidah NG, Austin RC. Loss-of-function PCSK9 mutants evade the unfolded protein response sensor GRP78 and fail to induce endoplasmic reticulum stress when retained. J Biol Chem 2018; 293:7329-7343. [PMID: 29593095 DOI: 10.1074/jbc.ra117.001049] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/15/2018] [Indexed: 01/07/2023] Open
Abstract
The proprotein convertase subtilisin/kexin type-9 (PCSK9) plays a central role in cardiovascular disease (CVD) by degrading hepatic low-density lipoprotein receptor (LDLR). As such, loss-of-function (LOF) PCSK9 variants that fail to exit the endoplasmic reticulum (ER) increase hepatic LDLR levels and lower the risk of developing CVD. The retention of misfolded protein in the ER can cause ER stress and activate the unfolded protein response (UPR). In this study, we investigated whether a variety of LOF PCSK9 variants that are retained in the ER can cause ER stress and hepatic cytotoxicity. Although overexpression of these PCSK9 variants caused an accumulation in the ER of hepatocytes, UPR activation or apoptosis was not observed. Furthermore, ER retention of endogenous PCSK9 via splice switching also failed to induce the UPR. Consistent with these in vitro studies, overexpression of PCSK9 in the livers of mice had no impact on UPR activation. To elucidate the cellular mechanism to explain these surprising findings, we observed that the 94-kDa glucose-regulated protein (GRP94) sequesters PCSK9 away from the 78-kDa glucose-regulated protein (GRP78), the major activator of the UPR. As a result, GRP94 knockdown increased the stability of GRP78-PCSK9 complex and resulted in UPR activation following overexpression of ER-retained PCSK9 variants relative to WT secreted controls. Given that overexpression of these LOF PCSK9 variants does not cause UPR activation under normal homeostatic conditions, therapeutic strategies aimed at blocking the autocatalytic cleavage of PCSK9 in the ER represent a viable strategy for reducing circulating PCSK9.
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Affiliation(s)
- Paul Lebeau
- Department of Medicine, Division of Nephrology, McMaster University, St. Joseph's Healthcare Hamilton and Hamilton Center for Kidney Research, Hamilton, Ontario L8N 4A6, Canada
| | - Khrystyna Platko
- Department of Medicine, Division of Nephrology, McMaster University, St. Joseph's Healthcare Hamilton and Hamilton Center for Kidney Research, Hamilton, Ontario L8N 4A6, Canada
| | - Ali A Al-Hashimi
- Department of Medicine, Division of Nephrology, McMaster University, St. Joseph's Healthcare Hamilton and Hamilton Center for Kidney Research, Hamilton, Ontario L8N 4A6, Canada
| | - Jae Hyun Byun
- Department of Medicine, Division of Nephrology, McMaster University, St. Joseph's Healthcare Hamilton and Hamilton Center for Kidney Research, Hamilton, Ontario L8N 4A6, Canada
| | - Šárka Lhoták
- Department of Medicine, Division of Nephrology, McMaster University, St. Joseph's Healthcare Hamilton and Hamilton Center for Kidney Research, Hamilton, Ontario L8N 4A6, Canada
| | - Nicholas Holzapfel
- Department of Medicine, Division of Nephrology, McMaster University, St. Joseph's Healthcare Hamilton and Hamilton Center for Kidney Research, Hamilton, Ontario L8N 4A6, Canada
| | - Gabriel Gyulay
- Department of Medicine, Division of Nephrology, McMaster University, St. Joseph's Healthcare Hamilton and Hamilton Center for Kidney Research, Hamilton, Ontario L8N 4A6, Canada
| | - Suleiman A Igdoura
- Departments of Biology and Pathology, McMaster University, Hamilton, Ontario L8S 4K1, Canada
| | - David R Cool
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, 45435-0001
| | - Bernardo Trigatti
- Thrombosis and Atherosclerosis Research Institute (TaARI), Hamilton Health Sciences and McMaster University, Hamilton, Ontario L8L 2X2, Canada; Departments of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario L8S 4L8, Canada
| | - Nabil G Seidah
- Laboratory of Biochemical Neuroendocrinology, Clinical Research Institute of Montreal, University of Montreal, Montreal, Quebec H2W 1R7, Canada
| | - Richard C Austin
- Department of Medicine, Division of Nephrology, McMaster University, St. Joseph's Healthcare Hamilton and Hamilton Center for Kidney Research, Hamilton, Ontario L8N 4A6, Canada; Thrombosis and Atherosclerosis Research Institute (TaARI), Hamilton Health Sciences and McMaster University, Hamilton, Ontario L8L 2X2, Canada.
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46
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Lam SM, Chua GH, Li XJ, Su B, Shui G. Biological relevance of fatty acyl heterogeneity to the neural membrane dynamics of rhesus macaques during normative aging. Oncotarget 2018; 7:55970-55989. [PMID: 27517158 PMCID: PMC5302890 DOI: 10.18632/oncotarget.11190] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 07/30/2016] [Indexed: 12/04/2022] Open
Abstract
Lipidomic analyses of the frontal cortex of Rhesus macaques across three selected age groups (young, sexually-mature, old) revealed that docosahexaenoic acids (DHAs) displayed notable and unique accretions in sexually-mature macaques for all phospholipid classes examined, which were not observable in all remaining polyunsaturated fatty acids (PUFAs) investigated. On the other hand, arachidonic acid (ARA) exhibited sharp attritions in the membrane lipidomes of sexually-mature macaques, a decline which was attenuated only for cardiolipins (CLs). DHA enrichment in phospholipids was lost in old macaques, with accompanying augmentations in very-long-chain sphingomyelins (VLC-SMs). Age-dependent alterations in membrane lipidomes point to a possibly complex temporal interplay between DHA-enriched membrane microdomains and SM-/cholesterol-rich rafts in neural membranes during normative aging. Lipid co-regulation data revealed an increasingly intense degree of co-regulation between membrane lipid classes with age, and suggest that reduction in CLs during normative brain aging may prompt alternative membrane lipid synthetic pathways driven by a compromised energy availability in the aging brain.
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Affiliation(s)
- Sin Man Lam
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Gek Huey Chua
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xiao-Jiang Li
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Bing Su
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Guanghou Shui
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
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47
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Yang YR, Fu J, Wootten S, Qi X, Liu M, Yan H, Liu Y. 2D Enzyme Cascade Network with Efficient Substrate Channeling by Swinging Arms. Chembiochem 2018; 19:212-216. [DOI: 10.1002/cbic.201700613] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Yuhe R. Yang
- Center for Molecular Design and Biomimetics The Biodesign Institute Arizona State University 1001 S. McAllister Avenue Tempe AZ 85287 USA
- School of Molecular Sciences Arizona State University Physical Sciences Building Room D-102 P. O. Box 871604 Tempe AZ 85287-1604 USA
| | - Jinglin Fu
- Department of Chemistry and Center for Computational and Integrative Biology Rutgers University–Camden 315 Penn Street Camden NJ 08102 USA
| | - Shaun Wootten
- Center for Molecular Design and Biomimetics The Biodesign Institute Arizona State University 1001 S. McAllister Avenue Tempe AZ 85287 USA
| | - Xiaodong Qi
- Center for Molecular Design and Biomimetics The Biodesign Institute Arizona State University 1001 S. McAllister Avenue Tempe AZ 85287 USA
- School of Molecular Sciences Arizona State University Physical Sciences Building Room D-102 P. O. Box 871604 Tempe AZ 85287-1604 USA
| | - Minghui Liu
- Center for Molecular Design and Biomimetics The Biodesign Institute Arizona State University 1001 S. McAllister Avenue Tempe AZ 85287 USA
- School of Molecular Sciences Arizona State University Physical Sciences Building Room D-102 P. O. Box 871604 Tempe AZ 85287-1604 USA
| | - Hao Yan
- Center for Molecular Design and Biomimetics The Biodesign Institute Arizona State University 1001 S. McAllister Avenue Tempe AZ 85287 USA
- School of Molecular Sciences Arizona State University Physical Sciences Building Room D-102 P. O. Box 871604 Tempe AZ 85287-1604 USA
| | - Yan Liu
- Center for Molecular Design and Biomimetics The Biodesign Institute Arizona State University 1001 S. McAllister Avenue Tempe AZ 85287 USA
- School of Molecular Sciences Arizona State University Physical Sciences Building Room D-102 P. O. Box 871604 Tempe AZ 85287-1604 USA
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48
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Castellano BM, Thelen AM, Moldavski O, Feltes M, van der Welle REN, Mydock-McGrane L, Jiang X, van Eijkeren RJ, Davis OB, Louie SM, Perera RM, Covey DF, Nomura DK, Ory DS, Zoncu R. Lysosomal cholesterol activates mTORC1 via an SLC38A9-Niemann-Pick C1 signaling complex. Science 2017; 355:1306-1311. [PMID: 28336668 DOI: 10.1126/science.aag1417] [Citation(s) in RCA: 361] [Impact Index Per Article: 51.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Accepted: 02/22/2017] [Indexed: 12/21/2022]
Abstract
The mechanistic target of rapamycin complex 1 (mTORC1) protein kinase is a master growth regulator that becomes activated at the lysosome in response to nutrient cues. Here, we identify cholesterol, an essential building block for cellular growth, as a nutrient input that drives mTORC1 recruitment and activation at the lysosomal surface. The lysosomal transmembrane protein, SLC38A9, is required for mTORC1 activation by cholesterol through conserved cholesterol-responsive motifs. Moreover, SLC38A9 enables mTORC1 activation by cholesterol independently from its arginine-sensing function. Conversely, the Niemann-Pick C1 (NPC1) protein, which regulates cholesterol export from the lysosome, binds to SLC38A9 and inhibits mTORC1 signaling through its sterol transport function. Thus, lysosomal cholesterol drives mTORC1 activation and growth signaling through the SLC38A9-NPC1 complex.
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Affiliation(s)
- Brian M Castellano
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA.,The Paul F. Glenn Center for Aging Research at the University of California, Berkeley, Berkeley, CA 94720, USA
| | - Ashley M Thelen
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA.,The Paul F. Glenn Center for Aging Research at the University of California, Berkeley, Berkeley, CA 94720, USA
| | - Ofer Moldavski
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA.,The Paul F. Glenn Center for Aging Research at the University of California, Berkeley, Berkeley, CA 94720, USA
| | - McKenna Feltes
- Diabetic Cardiovascular Disease Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Reini E N van der Welle
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA.,The Paul F. Glenn Center for Aging Research at the University of California, Berkeley, Berkeley, CA 94720, USA
| | - Laurel Mydock-McGrane
- Department of Developmental Biology and Biochemistry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Xuntian Jiang
- Diabetic Cardiovascular Disease Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Robert J van Eijkeren
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA.,The Paul F. Glenn Center for Aging Research at the University of California, Berkeley, Berkeley, CA 94720, USA
| | - Oliver B Davis
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA.,The Paul F. Glenn Center for Aging Research at the University of California, Berkeley, Berkeley, CA 94720, USA
| | - Sharon M Louie
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA.,Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA 94720, USA
| | - Rushika M Perera
- Department of Anatomy, Department of Pathology, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Douglas F Covey
- Department of Developmental Biology and Biochemistry, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Daniel K Nomura
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA.,Department of Nutritional Sciences and Toxicology, University of California at Berkeley, Berkeley, CA 94720, USA
| | - Daniel S Ory
- Diabetic Cardiovascular Disease Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Roberto Zoncu
- Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA. .,The Paul F. Glenn Center for Aging Research at the University of California, Berkeley, Berkeley, CA 94720, USA
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49
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Lee JH, Kang HS, Park HY, Moon YA, Kang YN, Oh BC, Song DK, Bae JH, Im SS. PPARα-dependent Insig2a overexpression inhibits SREBP-1c processing during fasting. Sci Rep 2017; 7:9958. [PMID: 28855656 PMCID: PMC5577246 DOI: 10.1038/s41598-017-10523-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/09/2017] [Indexed: 12/04/2022] Open
Abstract
Peroxisome-proliferator-activated receptor alpha (PPARα) and sterol regulatory element-binding protein (SREBP) play a role in regulating cellular fatty acid and cholesterol homeostasis via fatty acid oxidation and lipogenesis. The control of SREBP processing is regulated by the insulin induced gene (INSIG)2a protein, which binds SREBP to prevent SREBP translocation to the Golgi apparatus during nutrient starvation in the liver. However, the regulation of SREBP-1c processing by INSIGs during fasting and the regulatory mechanisms of the mouse Insig2a gene expression have not been clearly addressed. In the present study, we found that Insig2a was upregulated by PPARα in mouse livers and primary hepatocytes during fasting, whereas Insig2a mRNA expression was decreased in the livers of refed mice. A PPAR-responsive element between −126 bp and −114 bp in the Insig2a promoter was identified by a transient transfection assay and a chromatin immunoprecipitation assay; its role in regulation by PPARα was characterised using Pparα-null mice. These results suggest that PPARα is a trans-acting factor that enhances Insig2a gene expression, thereby suppressing SREBP-1c processing during fasting.
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Affiliation(s)
- Jae-Ho Lee
- Department of Physiology, Keimyung University School of Medicine, Daegu, 42601, South Korea
| | - Hye Suk Kang
- Department of Physiology, Keimyung University School of Medicine, Daegu, 42601, South Korea
| | - Hyeon Young Park
- Department of Physiology, Keimyung University School of Medicine, Daegu, 42601, South Korea
| | - Young-Ah Moon
- Department of Molecular Medicine, Inha University School of Medicine, Incheon, 22212, South Korea
| | - Yu Na Kang
- Department of Pathology, Keimyung University School of Medicine, Daegu, 42601, South Korea
| | - Byung-Chul Oh
- Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon, 21999, Korea; Department of Physiology, College of Medicine, Gachon University, Incheon, 21999, South Korea
| | - Dae-Kyu Song
- Department of Physiology, Keimyung University School of Medicine, Daegu, 42601, South Korea
| | - Jae-Hoon Bae
- Department of Physiology, Keimyung University School of Medicine, Daegu, 42601, South Korea
| | - Seung-Soon Im
- Department of Physiology, Keimyung University School of Medicine, Daegu, 42601, South Korea.
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50
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Beltrán-Heredia E, Almendro-Vedia VG, Monroy F, Cao FJ. Modeling the Mechanics of Cell Division: Influence of Spontaneous Membrane Curvature, Surface Tension, and Osmotic Pressure. Front Physiol 2017; 8:312. [PMID: 28579960 PMCID: PMC5437162 DOI: 10.3389/fphys.2017.00312] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 04/30/2017] [Indexed: 11/13/2022] Open
Abstract
Many cell division processes have been conserved throughout evolution and are being revealed by studies on model organisms such as bacteria, yeasts, and protozoa. Cellular membrane constriction is one of these processes, observed almost universally during cell division. It happens similarly in all organisms through a mechanical pathway synchronized with the sequence of cytokinetic events in the cell interior. Arguably, such a mechanical process is mastered by the coordinated action of a constriction machinery fueled by biochemical energy in conjunction with the passive mechanics of the cellular membrane. Independently of the details of the constriction engine, the membrane component responds against deformation by minimizing the elastic energy at every constriction state following a pathway still unknown. In this paper, we address a theoretical study of the mechanics of membrane constriction in a simplified model that describes a homogeneous membrane vesicle in the regime where mechanical work due to osmotic pressure, surface tension, and bending energy are comparable. We develop a general method to find approximate analytical expressions for the main descriptors of a symmetrically constricted vesicle. Analytical solutions are obtained by combining a perturbative expansion for small deformations with a variational approach that was previously demonstrated valid at the reference state of an initially spherical vesicle at isotonic conditions. The analytic approximate results are compared with the exact solution obtained from numerical computations, getting a good agreement for all the computed quantities (energy, area, volume, constriction force). We analyze the effects of the spontaneous curvature, the surface tension and the osmotic pressure in these quantities, focusing especially on the constriction force. The more favorable conditions for vesicle constriction are determined, obtaining that smaller constriction forces are required for positive spontaneous curvatures, low or negative membrane tension and hypertonic media. Conditions for spontaneous constriction at a given constriction force are also determined. The implications of these results for biological cell division are discussed. This work contributes to a better quantitative understanding of the mechanical pathway of cellular division, and could assist the design of artificial divisomes in vesicle-based self-actuated microsystems obtained from synthetic biology approaches.
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Affiliation(s)
- Elena Beltrán-Heredia
- Departamento de Física Atómica, Molecular y Nuclear, Universidad Complutense de MadridMadrid, Spain.,Departamento de Química Física I, Universidad Complutense de MadridMadrid, Spain
| | - Víctor G Almendro-Vedia
- Departamento de Física Atómica, Molecular y Nuclear, Universidad Complutense de MadridMadrid, Spain.,Departamento de Química Física I, Universidad Complutense de MadridMadrid, Spain
| | - Francisco Monroy
- Departamento de Química Física I, Universidad Complutense de MadridMadrid, Spain.,Translational Biophysics, Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12)Madrid, Spain
| | - Francisco J Cao
- Departamento de Física Atómica, Molecular y Nuclear, Universidad Complutense de MadridMadrid, Spain
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