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Jeong DW, Park JW, Kim KS, Kim J, Huh J, Seo J, Kim YL, Cho JY, Lee KW, Fukuda J, Chun YS. Palmitoylation-driven PHF2 ubiquitination remodels lipid metabolism through the SREBP1c axis in hepatocellular carcinoma. Nat Commun 2023; 14:6370. [PMID: 37828054 PMCID: PMC10570296 DOI: 10.1038/s41467-023-42170-0] [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: 10/21/2022] [Accepted: 10/02/2023] [Indexed: 10/14/2023] Open
Abstract
Palmitic acid (PA) is the most common fatty acid in humans and mediates palmitoylation through its conversion into palmitoyl coenzyme A. Although palmitoylation affects many proteins, its pathophysiological functions are only partially understood. Here we demonstrate that PA acts as a molecular checkpoint of lipid reprogramming in HepG2 and Hep3B cells. The zinc finger DHHC-type palmitoyltransferase 23 (ZDHHC23) mediates the palmitoylation of plant homeodomain finger protein 2 (PHF2), subsequently enhancing ubiquitin-dependent degradation of PHF2. This study also reveals that PHF2 functions as a tumor suppressor by acting as an E3 ubiquitin ligase of sterol regulatory element-binding protein 1c (SREBP1c), a master transcription factor of lipogenesis. PHF2 directly destabilizes SREBP1c and reduces SREBP1c-dependent lipogenesis. Notably, SREBP1c increases free fatty acids in hepatocellular carcinoma (HCC) cells, and the consequent PA induction triggers the PHF2/SREBP1c axis. Since PA seems central to activating this axis, we suggest that levels of dietary PA should be carefully monitored in patients with HCC.
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Affiliation(s)
- Do-Won Jeong
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Korea
- Department of Physiology, Seoul National University College of Medicine, Seoul, 03080, Korea
| | - Jong-Wan Park
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Korea
- Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, 03080, Korea
| | - Kyeong Seog Kim
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Korea
- Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine and Hospital, Seoul, 03080, Korea
| | - Jiyoung Kim
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Korea
| | - June Huh
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Korea
| | - Jieun Seo
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Korea
- Department of Physiology, Seoul National University College of Medicine, Seoul, 03080, Korea
- Faculty of Engineering, Yokohama National University, Yokohama, 240-8501, Japan
| | - Ye Lee Kim
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Korea
- Department of Physiology, Seoul National University College of Medicine, Seoul, 03080, Korea
| | - Joo-Youn Cho
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Korea
- Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine and Hospital, Seoul, 03080, Korea
| | - Kwang-Woong Lee
- Department of Surgery, Seoul National University College of Medicine, Seoul, 03080, Korea
| | - Junji Fukuda
- Faculty of Engineering, Yokohama National University, Yokohama, 240-8501, Japan
| | - Yang-Sook Chun
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, Korea.
- Department of Physiology, Seoul National University College of Medicine, Seoul, 03080, Korea.
- Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, 03080, Korea.
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2
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Jeong DW, Lee S, Chun YS. How cancer cells remodel lipid metabolism: strategies targeting transcription factors. Lipids Health Dis 2021; 20:163. [PMID: 34775964 PMCID: PMC8590761 DOI: 10.1186/s12944-021-01593-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 11/02/2021] [Indexed: 12/30/2022] Open
Abstract
Reprogramming of lipid metabolism has received increasing recognition as a hallmark of cancer cells because lipid dysregulation and the alteration of related enzyme profiles are closely correlated with oncogenic signals and malignant phenotypes, such as metastasis and therapeutic resistance. In this review, we describe recent findings that support the importance of lipids, as well as the transcription factors involved in cancer lipid metabolism. With recent advances in transcription factor analysis, including computer-modeling techniques, transcription factors are emerging as central players in cancer biology. Considering the limited number and the crucial role of transcription factors associated with lipid rewiring in cancers, transcription factor targeting is a promising potential strategy for cancer therapy.
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Affiliation(s)
- Do-Won Jeong
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, South Korea.,Department of Physiology, Seoul National University College of Medicine, Seoul, 03080, South Korea
| | - Seulbee Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, South Korea.,Department of Physiology, Seoul National University College of Medicine, Seoul, 03080, South Korea
| | - Yang-Sook Chun
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, 03080, South Korea. .,Department of Physiology, Seoul National University College of Medicine, Seoul, 03080, South Korea. .,Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul, 03080, South Korea.
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3
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Ashfaq W, Rehman K, Siddique MI, Khan QAA. Eicosapentaenoic Acid and Docosahexaenoic Acid from Fish Oil and Their Role in Cancer Research. FOOD REVIEWS INTERNATIONAL 2019. [DOI: 10.1080/87559129.2019.1686761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Wardah Ashfaq
- Department of Medicine, Ameer ud Din Medical College, Lahore, Pakistan
| | - Khurram Rehman
- Department of Pharmacy, Forman Christan College (A Chartered University), Lahore, Pakistan
| | - Muhammad Irfan Siddique
- Institute of Pharmaceutical Sciences, University of Veterinary & Animal Sciences, Lahore, Pakistan
| | - Qurrat-Al-Ain Khan
- Institute of Pharmaceutical Sciences, University of Veterinary & Animal Sciences, Lahore, Pakistan
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Zhou X, Mei H, Agee J, Brown T, Mao J. Racial differences in distribution of fatty acids in prostate cancer and benign prostatic tissues. Lipids Health Dis 2019; 18:189. [PMID: 31677641 PMCID: PMC6825718 DOI: 10.1186/s12944-019-1130-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 10/03/2019] [Indexed: 12/27/2022] Open
Abstract
Background It remains controversial whether and which fatty acids are different between prostate cancer (PCa) and benign prostatic tissues (BPT) in association with occurrence, progression and racial disparity between African American (AA) and Caucasian American (CA) populations. Methods Total fatty acids (TFA) and free fatty acid (FFA) were determined on fresh frozen prostatic tissues including 26 PCa and 21 BPT from AA and CA patients by Gas chromatography with flame ionization detection (GC-FID) and Electrospray Ionization Mass Spectrometry (ESI-MS), respectively. Results In all studied population, TFA in 8 out of 16 individual species, in total and in groups of saturated total fatty acid (STFA), mono-unsaturated total fatty acid (MUTFA), poly-unsaturated total fatty acid (PUTFA) and n-6 TFA were significantly higher in PCa than in BPT; FFA in 4 out of 10 individual species, in total and in groups of MUFFA, PUFFA, n-6 FFA and n-3 FFA were significantly higher in PCa than in BPT. The concentrations of most fatty acid parameters correlated with Gleason’s grade and clinical stage of PCa. As compared with CA men, AA men had higher concentrations of TFA, especially TFA with chains of 14–18 carbons than in BPT, and lower concentrations of TFA in PCa. Conclusions Increasing in prostatic fatty acids in the form of TFA and FFA correlated to occurrence, progression and racial disparity of PCa.
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Affiliation(s)
- Xinchun Zhou
- Department of Pathology, Cancer Institute University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216-4505, USA.
| | - Hao Mei
- Department of Data Science, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Joshua Agee
- Department of Biology, Tougaloo College, Tougaloo, MS, 39157, USA
| | - Timera Brown
- Department of Biology, Tougaloo College, Tougaloo, MS, 39157, USA
| | - Jinghe Mao
- Department of Biology, Tougaloo College, Tougaloo, MS, 39157, USA
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Rodríguez-Blanco G, Zeneyedpour L, Duijvesz D, Hoogland AM, Verhoef EI, Kweldam CF, Burgers PC, Smitt PS, Bangma CH, Jenster G, van Leenders GJLH, Dekker LJM, Luider TM. Tissue proteomics outlines AGR2 AND LOX5 as markers for biochemical recurrence of prostate cancer. Oncotarget 2018; 9:36444-36456. [PMID: 30559929 PMCID: PMC6284859 DOI: 10.18632/oncotarget.26342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 10/21/2018] [Indexed: 12/22/2022] Open
Abstract
Although many patients are cured from prostate cancer (PCa) by surgery only, there are still patients who will experience rising prostate-specific antigen (PSA) levels after surgery, a condition known as biochemical recurrence (BCR). Novel protein prognostic markers in PCa tissue might enable finding better treatment for those patients experiencing BCR with a high chance of metastasis. In this study, we aimed to identify altered proteins in prostate cancer tissue, and to evaluate their potential role as prognostic markers. We used two proteomics strategies to analyse 34 prostate tumours (PCa) and 33 normal adjacent prostate (NAP) tissues. An independent cohort of 481 samples was used to evaluate the expression of three proteins: AGR2, FASN and LOX5 as prognostic markers of the disease. Tissue microarray immunohistochemical staining indicated that a low percentage of positive tumour cells for AGR2 (HR (95% CI) = 0.61 (0.43-0.93)), and a low percentage of positive tumour cells for LOX5 expression (HR (95% CI) = 2.53 (1.23-5.22)) are predictors of BCR after RP. In contrast, FASN expression had no prognostic value for PCa.
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Affiliation(s)
| | - Lona Zeneyedpour
- Department of Neurology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Diederick Duijvesz
- Department of Urology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - A Marije Hoogland
- Department of Pathology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Esther I Verhoef
- Department of Pathology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | | | - Peter C Burgers
- Department of Neurology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | | | - Chris H Bangma
- Department of Urology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Guido Jenster
- Department of Urology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | | | - Lennard J M Dekker
- Department of Neurology, Erasmus Medical Centre, Rotterdam, The Netherlands
| | - Theo M Luider
- Department of Neurology, Erasmus Medical Centre, Rotterdam, The Netherlands
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Yoo HJ, Kim M, Kim M, Kang M, Jung KJ, Hwang SM, Jee SH, Lee JH. Analysis of metabolites and metabolic pathways in breast cancer in a Korean prospective cohort: the Korean Cancer Prevention Study-II. Metabolomics 2018; 14:85. [PMID: 30830383 DOI: 10.1007/s11306-018-1382-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 06/05/2018] [Indexed: 01/06/2023]
Abstract
INTRODUCTION Since blood is in contact with all tissues in the body and is considered to dynamically reflect the body's pathophysiological status, serum metabolomics changes are important and have diagnostic value in early cancer detection. OBJECTIVES In this prospective study, we investigated the application of metabolomics to differentiate subjects with incident breast cancer (BC) from subjects who remained free of cancer during a mean follow-up period of 7 years with the aim of identifying valuable biomarkers for BC. METHODS Baseline serum samples from 84 female subjects with incident BC (BC group) and 88 cancer-free female subjects (control group) were used. Metabolic alterations associated with BC were investigated via metabolomics analysis of the baseline serum samples using ultra-performance liquid chromatography-linear-trap quadrupole-Orbitrap mass spectrometry. RESULTS A total of 57 metabolites were identified through the metabolic analysis. Among them, 20 metabolite levels were significantly higher and 22 metabolite levels were significantly lower in the BC group than in the control group at baseline. Ten metabolic pathways, including amino acid metabolism, arachidonic acid (AA) metabolism, fatty acid metabolism, linoleic acid metabolism, and retinol metabolism, showed significant differences between the BC group and the control group. Logistic regression revealed that the incidence of BC was affected by leucine, AA, prostaglandin (PG)J2, PGE2, and γ-linolenic acid (GLA). CONCLUSIONS This prospective study showed the clinical relevance of dysregulation of various metabolisms on the incidence of BC. Additionally, leucine, AA, PGJ2, PGE2, and GLA were identified as independent variables affecting the incidence of BC.
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Affiliation(s)
- Hye Jin Yoo
- Department of Food and Nutrition, Brain Korea 21 PLUS Project, College of Human Ecology, Yonsei University, Seoul, South Korea
| | - Minjoo Kim
- Research Center for Silver Science, Institute of Symbiotic Life-TECH, Yonsei University, Seoul, South Korea
| | - Minkyung Kim
- Research Center for Silver Science, Institute of Symbiotic Life-TECH, Yonsei University, Seoul, South Korea
| | - Minsik Kang
- Department of Food and Nutrition, Brain Korea 21 PLUS Project, College of Human Ecology, Yonsei University, Seoul, South Korea
- National Leading Research Laboratory of Clinical Nutrigenetics/Nutrigenomics, Department of Food and Nutrition, College of Human Ecology, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Keum Ji Jung
- Institute for Health Promotion, Graduate School of Public Health, Yonsei University, Seoul, South Korea
| | - Se-Mi Hwang
- Institute for Health Promotion, Graduate School of Public Health, Yonsei University, Seoul, South Korea
| | - Sun Ha Jee
- Institute for Health Promotion, Graduate School of Public Health, Yonsei University, Seoul, South Korea
| | - Jong Ho Lee
- Department of Food and Nutrition, Brain Korea 21 PLUS Project, College of Human Ecology, Yonsei University, Seoul, South Korea.
- Research Center for Silver Science, Institute of Symbiotic Life-TECH, Yonsei University, Seoul, South Korea.
- National Leading Research Laboratory of Clinical Nutrigenetics/Nutrigenomics, Department of Food and Nutrition, College of Human Ecology, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
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7
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Dietary n-3 and n-6 polyunsaturated fatty acids, the FADS gene, and the risk of gastric cancer in a Korean population. Sci Rep 2018; 8:3823. [PMID: 29491470 PMCID: PMC5830640 DOI: 10.1038/s41598-018-21960-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 02/02/2018] [Indexed: 02/07/2023] Open
Abstract
n-3 polyunsaturated fatty acids (PUFAs) and n-6 PUFAs are reported to have immunomodulatory effects, but few studies have examined these functions. Thus, we examined whether dietary n-3 and n-6 PUFAs are associated with the risk of gastric cancer and further investigated whether fatty acid desaturases 1 and 2 (FADS1 and FADS2) modify this association. In a case-control study, 1,464 participants (402 cases and 1,062 controls) were enrolled. A semi-quantitative food frequency questionnaire was utilized to measure dietary PUFA intake. Genotyping was performed using the Axiom® Exome 319 Array. Multivariable logistic models were established after adjusting for confounding variables. The risk of gastric cancer was significantly decreased among participants who had the highest tertile intake of docosahexaenoic acid (DHA), an n-3 PUFA, even after adjusting for covariates [odds ratios (OR) = 0.72, 95% confidence intervals (95% CIs) = 0.53-0.99]. However, no significant interaction according to FADS1 rs174546 or FADS2 rs174583 was observed. In conclusion, we observed a significant inverse association between dietary DHA and the risk of gastric cancer but found that FADS1 rs174546 and FADS2 rs174583 did not modify the association between dietary n-3 or n-6 PUFAs and gastric cancer risk.
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8
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Chen T, Li H. Fatty acid metabolism and prospects for targeted therapy of cancer. EUR J LIPID SCI TECH 2017. [DOI: 10.1002/ejlt.201600366] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tingting Chen
- West China College of Basic and Forensic MedicineSichuan UniversityChengduP. R. China
| | - Hua Li
- West China College of Basic and Forensic MedicineSichuan UniversityChengduP. R. China
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9
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Pietrzyk Ł. Food properties and dietary habits in colorectal cancer prevention and development. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2017. [DOI: 10.1080/10942912.2016.1236813] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Łukasz Pietrzyk
- Department of Didactics and Medical Simulation, Chair of Human Anatomy, Medical University of Lublin, Lublin, Poland
- Department of General, Oncological and Minimally Invasive Surgery, 1st Military Clinical Hospital in Lublin, Lublin, Poland
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10
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Rodríguez-Blanco G, Burgers PC, Dekker LJM, Ijzermans JJN, Wildhagen MF, Schenk-Braat EAM, Bangma CH, Jenster G, Luider TM. Serum levels of arachidonic acid metabolites change during prostate cancer progression. Prostate 2014; 74:618-27. [PMID: 24435810 DOI: 10.1002/pros.22779] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 12/27/2013] [Indexed: 01/15/2023]
Abstract
BACKGROUND Arachidonic acid (AA) pathway has been shown to play a role in the development and progression of prostate cancer (PCa). In this study we aimed to assess the changes in concentrations of hydroxyeicosatetraenoic acids (HETEs) in serum samples from patients diagnosed with PCa compared to controls. METHODS HETEs were determined using ultrahigh pressure liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). RESULTS Elevated concentrations of 5-HETE, 8-HETE, 11-HETE and 15-HETE were observed in 6 out of 20 patients diagnosed with PCa; no statistical differences with controls were observed for 12-HETE and AA in the discovery set. An independent validation set composed of 222 samples divided in five groups ranging from subjects with low PSA and no PCa, to patients with advanced PCa was included. In 30% of the patients in the advanced PCa group, up to ten times higher concentrations of the same set of HETEs were observed with a significant concomitant decrease of the concentration of AA. Logistic regression and Kaplan-Meier curves illustrate that a decreased concentration of AA is a predictor of PCa biochemical recurrence after radical prostatectomy (RP). CONCLUSIONS From the present study we conclude that a significant association between AA and AA metabolites in serum and PCa progression exists, although serum concentrations of HETEs exhibited low sensitivity toward the diagnosis of PCa.
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11
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Dayaker G, Durand T, Balas L. Total Synthesis of Neuroprotectin D1 Analogues Derived from Omega-6 Docosapentaenoic Acid (DPA) and Adrenic Acid (AdA) from a Common Pivotal, Late-Stage Intermediate. J Org Chem 2014; 79:2657-65. [DOI: 10.1021/jo500147r] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Gandrath Dayaker
- Faculté
de Pharmacie, Institut des Biomolécules Max Mousseron (IBMM, UMR5247 CNRS-UM1-UM2-ENSCM), 15 av. C. Flahault, BP 14491, 34093 Montpellier Cedex 5, France
| | - Thierry Durand
- Faculté
de Pharmacie, Institut des Biomolécules Max Mousseron (IBMM, UMR5247 CNRS-UM1-UM2-ENSCM), 15 av. C. Flahault, BP 14491, 34093 Montpellier Cedex 5, France
| | - Laurence Balas
- Faculté
de Pharmacie, Institut des Biomolécules Max Mousseron (IBMM, UMR5247 CNRS-UM1-UM2-ENSCM), 15 av. C. Flahault, BP 14491, 34093 Montpellier Cedex 5, France
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12
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Brown M, Roulson JA, Hart CA, Tawadros T, Clarke NW. Arachidonic acid induction of Rho-mediated transendothelial migration in prostate cancer. Br J Cancer 2014; 110:2099-108. [PMID: 24595005 PMCID: PMC3992515 DOI: 10.1038/bjc.2014.99] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Revised: 01/23/2014] [Accepted: 01/28/2014] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Bone metastases in prostate cancer (CaP) result in CaP-related morbidity/mortality. The omega-6 polyunsaturated fatty acid (PUFA) arachidonic acid (AA) and lipophilic statins affect metastasis-like behaviour in CaP cells, regulating the critical metastatic step of CaP migration to the bone marrow stroma. METHODS Microscopic analysis and measurement of adhesion and invasion of CaP cells through bone marrow endothelial cells (BMEC) was undertaken with AA stimulation and/or simvastatin (SIM) treatment. Amoeboid characteristics of PC-3, PC3-GFP and DU-145 were analysed by western blotting and Rho assays. RESULTS The CaP cell lines PC-3, PC3-GFP and DU-145 share the ability to migrate across a BMEC layer. Specific amoeboid inhibition decreased transendothelial migration (TEM). AA stimulates amoeboid characteristics, driven by Rho signalling. Selective knock-down of components of the Rho pathway (RhoA, RhoC, Rho-associated protein kinase 1 (ROCK1) and ROCK2) showed that Rho signalling is crucial to TEM. Functions of these components were analysed, regarding adhesion to BMEC, migration in 2D and the induction of the amoeboid phenotype by AA. TEM was reduced by SIM treatment of PC3-GFP and DU-145, which inhibited Rho pathway signalling. CONCLUSIONS AA-induced TEM is mediated by the induction of a Rho-driven amoeboid phenotype. Inhibition of this cell migratory process may be an important therapeutic target in high-risk CaP.
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Affiliation(s)
- M Brown
- Genito Urinary Cancer Research Group, Institute of Cancer Sciences, Paterson Building, The University of Manchester, Manchester Academic Health Science Centre, Wilmslow Road, Manchester M20 4BX, UK
| | - J-A Roulson
- Genito Urinary Cancer Research Group, Institute of Cancer Sciences, Paterson Building, The University of Manchester, Manchester Academic Health Science Centre, Wilmslow Road, Manchester M20 4BX, UK
| | - C A Hart
- Genito Urinary Cancer Research Group, Institute of Cancer Sciences, Paterson Building, The University of Manchester, Manchester Academic Health Science Centre, Wilmslow Road, Manchester M20 4BX, UK
| | - T Tawadros
- Genito Urinary Cancer Research Group, Institute of Cancer Sciences, Paterson Building, The University of Manchester, Manchester Academic Health Science Centre, Wilmslow Road, Manchester M20 4BX, UK
| | - N W Clarke
- 1] Genito Urinary Cancer Research Group, Institute of Cancer Sciences, Paterson Building, The University of Manchester, Manchester Academic Health Science Centre, Wilmslow Road, Manchester M20 4BX, UK [2] Department of Urology, Salford Royal Hospital NHS Foundation Trust, Stott Lane, Salford M6 8HD, UK
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13
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Mechanisms of omega-3 polyunsaturated fatty acids in prostate cancer prevention. BIOMED RESEARCH INTERNATIONAL 2013; 2013:824563. [PMID: 23762859 PMCID: PMC3676993 DOI: 10.1155/2013/824563] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 05/02/2013] [Accepted: 05/08/2013] [Indexed: 12/22/2022]
Abstract
This review focuses on several key areas where progress has been made recently to highlight the role of omega-3 polyunsaturated fatty acid in prostate cancer prevention.
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14
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Blood level omega-3 Fatty acids as risk determinant molecular biomarker for prostate cancer. Prostate Cancer 2013; 2013:875615. [PMID: 23589776 PMCID: PMC3621295 DOI: 10.1155/2013/875615] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 10/07/2012] [Accepted: 12/06/2012] [Indexed: 12/23/2022] Open
Abstract
Previous researches involving dietary methods have shown
conflicting findings. Authors sought to assess the association of
prostate cancer risk with blood levels of omega-3 polyunsaturated
fatty acids (n-3 PUFA) through a meta-analysis of human
epidemiological studies in available online databases (July,
2012). After critical appraisal by two independent reviewers,
Newcastle-Ottawa Quality Assessment Scale (NOQAS) was used to
grade the studies. Six case control and six nested case control
studies were included. Results showed nonsignificant association
of overall effect estimates with total or advanced prostate cancer
or high-grade tumor. High blood level of alpha-linolenic acid
(ALA) had nonsignificant positive association with total prostate
cancer risk. High blood level of docosapentaenoic acid (DPA) had
significant negative association with total prostate cancer risk.
Specific n-3 PUFA in fish oil, eicosapentaenoic acid (EPA), and
docosahexaenoic acid (DHA) had positive association with
high-grade prostate tumor risk only after adjustment of interstudy
variability. There is evidence that high blood level of DPA that
is linked with reduced total prostate cancer risk and elevated
blood levels of fish oils, EPA, and DHA is associated with
high-grade prostate tumor, but careful interpretation is needed
due to intricate details involved in prostate carcinogenesis and
N-3 PUFA metabolism.
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15
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Ligand-independent activation of EphA2 by arachidonic acid induces metastasis-like behaviour in prostate cancer cells. Br J Cancer 2012; 107:1737-44. [PMID: 23037715 PMCID: PMC3493871 DOI: 10.1038/bjc.2012.457] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Background: High intake of omega-6 polyunsaturated fatty acids (PUFA) has been associated with clinical progression in prostate cancer (CaP). This study investigates the signalling mechanism by which the omega-6 PUFA arachidonic acid (AA) induces prostatic cellular migration to bone marrow stroma. Methods: Western blot analysis of the PC-3, PC3-GFP, DU 145 and LNCaP cells or their lipid raft (LR) components post AA stimulation was conducted in association with assays for adhesion and invasion through the bone marrow endothelial monolayers. Results: Arachidonic acid increased transendothelial migration of PC3-GFP cells (adhesion 37%±0.08, P=0.0124; transmigration 270%±0.145, P=0.0008). Akt, Src and focal adhesion kinase (FAK) pathways were induced by AA and integrally involved in transendothelial migration. LR were critical in AA uptake and induced Akt activity. Ephrin receptor A2 (EphA2), localised in LR, is expressed in DU 145 and PC-3 cells. Arachidonic acid induced a rapid increase of EphA2 Akt-dependent/ligand-independent activation, while knockdown of the EphrinA1 ligand decreased AA induced transendothelial migration, with an associated decrease in Src and FAK activity. Arachidonic acid activated Akt in EphA2− LNCaP cells but failed to induce BMEC transendothelial invasion. Conclusion: Arachidonic acid induced stimulation of EphA2 in vitro is associated fundamentally with CaP epithelial migration across the endothelial barrier.
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