1
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Rzasa P, Whelan S, Farahmand P, Cai H, Guterman I, Palacios-Gallego R, Undru SS, Sandford L, Green C, Andreadi C, Mintseva M, Parrott E, Jin H, Hey F, Giblett S, Sylvius NB, Allcock NS, Straatman-Iwanowska A, Feuda R, Tufarelli C, Brown K, Pritchard C, Rufini A. BRAF V600E-mutated serrated colorectal neoplasia drives transcriptional activation of cholesterol metabolism. Commun Biol 2023; 6:962. [PMID: 37735514 PMCID: PMC10514332 DOI: 10.1038/s42003-023-05331-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 09/07/2023] [Indexed: 09/23/2023] Open
Abstract
BRAF mutations occur early in serrated colorectal cancers, but their long-term influence on tissue homeostasis is poorly characterized. We investigated the impact of short-term (3 days) and long-term (6 months) expression of BrafV600E in the intestinal tissue of an inducible mouse model. We show that BrafV600E perturbs the homeostasis of intestinal epithelial cells, with impaired differentiation of enterocytes emerging after prolonged expression of the oncogene. Moreover, BrafV600E leads to a persistent transcriptional reprogramming with enrichment of numerous gene signatures indicative of proliferation and tumorigenesis, and signatures suggestive of metabolic rewiring. We focused on the top-ranking cholesterol biosynthesis signature and confirmed its increased expression in human serrated lesions. Functionally, the cholesterol lowering drug atorvastatin prevents the establishment of intestinal crypt hyperplasia in BrafV600E-mutant mice. Overall, our work unveils the long-term impact of BrafV600E expression in intestinal tissue and suggests that colorectal cancers with mutations in BRAF might be prevented by statins.
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Affiliation(s)
- Paulina Rzasa
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Sarah Whelan
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Pooyeh Farahmand
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Hong Cai
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Inna Guterman
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | | | - Shanthi S Undru
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Lauren Sandford
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, UK
| | - Caleb Green
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Catherine Andreadi
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Maria Mintseva
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
- Area of Neuroscience, International School for Advanced Studies (SISSA), Trieste, Italy
| | - Emma Parrott
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Hong Jin
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Fiona Hey
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Susan Giblett
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Nicolas B Sylvius
- NUCLEUS Genomics, Core Biotechnology Services, University of Leicester, Leicester, UK
| | - Natalie S Allcock
- University of Leicester Core Biotechnology Services Electron Microscopy Facility, Leicester, UK
| | | | - Roberto Feuda
- Department of Genetics and Genome Biology, University of Leicester, Leicester, UK
| | - Cristina Tufarelli
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Karen Brown
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Catrin Pritchard
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK
| | - Alessandro Rufini
- Leicester Cancer Research Centre, University of Leicester, Leicester, UK.
- Dipartimento di Bioscienze, University of Milan, Milan, Italy.
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2
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Solomon CU, McVey DG, Andreadi C, Gong P, Turner L, Stanczyk PJ, Khemiri S, Chamberlain JC, Yang W, Webb TR, Nelson CP, Samani NJ, Ye S. Effects of Coronary Artery Disease-Associated Variants on Vascular Smooth Muscle Cells. Circulation 2022; 146:917-929. [PMID: 35735005 PMCID: PMC9484647 DOI: 10.1161/circulationaha.121.058389] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 05/24/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND Genome-wide association studies have identified many genetic loci that are robustly associated with coronary artery disease (CAD). However, the underlying biological mechanisms are still unknown for most of these loci, hindering the progress to medical translation. Evidence suggests that the genetic influence on CAD susceptibility may act partly through vascular smooth muscle cells (VSMCs). METHODS We undertook genotyping, RNA sequencing, and cell behavior assays on a large bank of VSMCs (n>1499). Expression quantitative trait locus and splicing quantitative trait locus analyses were performed to identify genes with an expression that was influenced by CAD-associated variants. To identify candidate causal genes for CAD, we ascertained colocalizations of VSMC expression quantitative trait locus signals with CAD association signals by performing causal variants identification in associated regions analysis and the summary data-based mendelian randomization test. Druggability analysis was then performed on the candidate causal genes. CAD risk variants were tested for associations with VSMC proliferation, migration, and apoptosis. Collective effects of multiple CAD-associated variants on VSMC behavior were estimated by polygenic scores. RESULTS Approximately 60% of the known CAD-associated variants showed statistically significant expression quantitative trait locus or splicing quantitative trait locus effects in VSMCs. Colocalization analyses identified 84 genes with expression quantitative trait locus signals that significantly colocalized with CAD association signals, identifying them as candidate causal genes. Druggability analysis indicated that 38 of the candidate causal genes were druggable, and 13 had evidence of drug-gene interactions. Of the CAD-associated variants tested, 139 showed suggestive associations with VSMC proliferation, migration, or apoptosis. A polygenic score model explained up to 5.94% of variation in several VSMC behavior parameters, consistent with polygenic influences on VSMC behavior. CONCLUSIONS This comprehensive analysis shows that a large percentage of CAD loci can modulate gene expression in VSMCs and influence VSMC behavior. Several candidate causal genes identified are likely to be druggable and thus represent potential therapeutic targets.
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Affiliation(s)
- Charles U. Solomon
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - David G. McVey
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Catherine Andreadi
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Peng Gong
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Lenka Turner
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Paulina J. Stanczyk
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Sonja Khemiri
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Julie C. Chamberlain
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Wei Yang
- Shantou University Medical College, China (W.Y., S.Y.)
| | - Tom R. Webb
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Christopher P. Nelson
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Nilesh J. Samani
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
| | - Shu Ye
- Department of Cardiovascular Sciences, University of Leicester, and National Institute for Health Research Leicester Biomedical Research Centre, UK (C.U.S., D.G.M., C.A., P.G., L.T., P.J.S., S.K., J.C.C., T.R.W., C.P.N., J.N.S., S.Y.)
- Shantou University Medical College, China (W.Y., S.Y.)
- Cardiovascular Disease Translational Research Programme, Department of Medicine, National University of Singapore (S.Y.)
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3
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Hey F, Andreadi C, Noble C, Patel B, Jin H, Kamata T, Straatman K, Luo J, Balmanno K, Jones DT, Collins VP, Cook SJ, Caunt CJ, Pritchard C. Over-expressed, N-terminally truncated BRAF is detected in the nucleus of cells with nuclear phosphorylated MEK and ERK. Heliyon 2018; 4:e01065. [PMID: 30603699 PMCID: PMC6304467 DOI: 10.1016/j.heliyon.2018.e01065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 09/12/2018] [Accepted: 12/14/2018] [Indexed: 12/31/2022] Open
Abstract
BRAF is a cytoplasmic protein kinase, which activates the MEK-ERK signalling pathway. Deregulation of the pathway is associated with the presence of BRAF mutations in human cancer, the most common being V600E BRAF, although structural rearrangements, which remove N-terminal regulatory sequences, have also been reported. RAF-MEK-ERK signalling is normally thought to occur in the cytoplasm of the cell. However, in an investigation of BRAF localisation using fluorescence microscopy combined with subcellular fractionation of Green Fluorescent Protein (GFP)-tagged proteins expressed in NIH3T3 cells, surprisingly, we detected N-terminally truncated BRAF (ΔBRAF) in both nuclear and cytoplasmic compartments. In contrast, ΔCRAF and full-length, wild-type BRAF (WTBRAF) were detected at lower levels in the nucleus while full-length V600EBRAF was virtually excluded from this compartment. Similar results were obtained using ΔBRAF tagged with the hormone-binding domain of the oestrogen receptor (hbER) and with the KIAA1549-ΔBRAF translocation mutant found in human pilocytic astrocytomas. Here we show that GFP-ΔBRAF nuclear translocation does not involve a canonical Nuclear Localisation Signal (NLS), but is suppressed by N-terminal sequences. Nuclear GFP-ΔBRAF retains MEK/ERK activating potential and is associated with the accumulation of phosphorylated MEK and ERK in the nucleus. In contrast, full-length GFP-WTBRAF and GFP-V600EBRAF are associated with the accumulation of phosphorylated ERK but not phosphorylated MEK in the nucleus. These data have implications for cancers bearing single nucleotide variants or N-terminal deleted structural variants of BRAF.
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Affiliation(s)
- Fiona Hey
- Department of Molecular Cell Biology, University of Leicester, Lancaster Road, Leicester LE1 9HN, UK
| | - Catherine Andreadi
- Leicester Cancer Research Centre, Clinical Sciences Building, University of Leicester, Leicester Royal Infirmary, Leicester LE2 7LX, UK
| | - Catherine Noble
- Department of Molecular Cell Biology, University of Leicester, Lancaster Road, Leicester LE1 9HN, UK
| | - Bipin Patel
- Department of Molecular Cell Biology, University of Leicester, Lancaster Road, Leicester LE1 9HN, UK
| | - Hong Jin
- Department of Molecular Cell Biology, University of Leicester, Lancaster Road, Leicester LE1 9HN, UK
| | - Tamihiro Kamata
- Leicester Cancer Research Centre, Clinical Sciences Building, University of Leicester, Leicester Royal Infirmary, Leicester LE2 7LX, UK
| | - Kees Straatman
- Core Biotechnology Services, University of Leicester, Lancaster Road, Leicester LE1 9HN, UK
| | - Jinli Luo
- Leicester Cancer Research Centre, Clinical Sciences Building, University of Leicester, Leicester Royal Infirmary, Leicester LE2 7LX, UK
| | - Kathryn Balmanno
- Signalling Laboratory, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - David T.W. Jones
- Department of Pathology, Division of Molecular Histopathology, University of Cambridge, Cambridge CB2 0QQ, UK
| | - V. Peter Collins
- Department of Pathology, Division of Molecular Histopathology, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Simon J. Cook
- Signalling Laboratory, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Christopher J. Caunt
- Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Catrin Pritchard
- Leicester Cancer Research Centre, Clinical Sciences Building, University of Leicester, Leicester Royal Infirmary, Leicester LE2 7LX, UK
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4
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Alexandrou C, Al-Aqbi SS, Higgins JA, Boyle W, Karmokar A, Andreadi C, Luo JL, Moore DA, Viskaduraki M, Blades M, Murray GI, Howells LM, Thomas A, Brown K, Cheng PN, Rufini A. Sensitivity of Colorectal Cancer to Arginine Deprivation Therapy is Shaped by Differential Expression of Urea Cycle Enzymes. Sci Rep 2018; 8:12096. [PMID: 30108309 PMCID: PMC6092409 DOI: 10.1038/s41598-018-30591-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 08/02/2018] [Indexed: 02/08/2023] Open
Abstract
Tumors deficient in the urea cycle enzymes argininosuccinate synthase-1 (ASS1) and ornithine transcarbamylase (OTC) are unable to synthesize arginine and can be targeted using arginine-deprivation therapy. Here, we show that colorectal cancers (CRCs) display negligible expression of OTC and, in subset of cases, ASS1 proteins. CRC cells fail to grow in arginine-free medium and dietary arginine deprivation slows growth of cancer cells implanted into immunocompromised mice. Moreover, we report that clinically-formulated arginine-degrading enzymes are effective anticancer drugs in CRC. Pegylated arginine deiminase (ADI-PEG20), which degrades arginine to citrulline and ammonia, affects growth of ASS1-negative cells, whereas recombinant human arginase-1 (rhArg1peg5000), which degrades arginine into urea and ornithine, is effective against a broad spectrum of OTC-negative CRC cell lines. This reflects the inability of CRC cells to recycle citrulline and ornithine into the urea cycle. Finally, we show that arginase antagonizes chemotherapeutic drugs oxaliplatin and 5-fluorouracil (5-FU), whereas ADI-PEG20 synergizes with oxaliplatin in ASS1-negative cell lines and appears to interact with 5-fluorouracil independently of ASS1 status. Overall, we conclude that CRC is amenable to arginine-deprivation therapy, but we warrant caution when combining arginine deprivation with standard chemotherapy.
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Affiliation(s)
- Constantinos Alexandrou
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK
| | - Saif Sattar Al-Aqbi
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK.,Department of Pathology and Poultry Diseases, Faculty of Veterinary Medicine, University of Kufa, Kufa, Iraq
| | - Jennifer A Higgins
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK
| | - William Boyle
- Birmingham Women's Hospital, Birmingham, B15 2TG, UK
| | - Ankur Karmokar
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK
| | - Catherine Andreadi
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK
| | - Jin-Li Luo
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK
| | - David A Moore
- Department of Pathology, UCL Cancer Centre, UCL, London, UK
| | - Maria Viskaduraki
- Bioinformatics and Biostatistics Support Hub, University of Leicester, Leicester, LE1 7RH, UK
| | - Matthew Blades
- Bioinformatics and Biostatistics Support Hub, University of Leicester, Leicester, LE1 7RH, UK
| | - Graeme I Murray
- Department of Pathology, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25, 2ZD, UK
| | - Lynne M Howells
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK
| | - Anne Thomas
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK
| | - Karen Brown
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK
| | - Paul N Cheng
- Bio-Cancer Treatment International Limited, Hong Kong, Hong Kong
| | - Alessandro Rufini
- Department of Genetics and Genome Biology, Leicester Cancer Research Centre, University of Leicester, Leicester, LE2 7LX, UK.
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5
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Zhao G, Yang W, Wu J, Chen B, Yang X, Chen J, McVey DG, Andreadi C, Gong P, Webb TR, Samani NJ, Ye S. Influence of a Coronary Artery Disease-Associated Genetic Variant on FURIN Expression and Effect of Furin on Macrophage Behavior. Arterioscler Thromb Vasc Biol 2018; 38:1837-1844. [PMID: 29976768 PMCID: PMC6092112 DOI: 10.1161/atvbaha.118.311030] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 06/13/2018] [Indexed: 02/05/2023]
Abstract
Objective- Genome-wide association studies have revealed a robust association between genetic variation on chromosome 15q26.1 and coronary artery disease (CAD) susceptibility; however, the underlying biological mechanism is still unknown. The lead CAD-associated genetic variant (rs17514846) at this locus resides in the FURIN gene. In advanced atherosclerotic plaques, furin is expressed primarily in macrophages. We investigated whether this CAD-associated variant alters FURIN expression and whether furin affects monocyte/macrophage behavior. Approach and Results- A quantitative reverse transcription polymerase chain reaction analysis showed that leukocytes from individuals carrying the CAD risk allele (A) of rs17514846 had increased FURIN expression. A chromatin immunoprecipitation assay revealed higher RNA polymerase II occupancy in the FURIN gene in mononuclear cells of individuals carrying this allele. A reporter gene assay in transiently transfected monocytes/macrophages indicated that the CAD risk allele had higher transcriptional activity than the nonrisk allele (C). An analysis of isogenic monocyte cell lines created by CRISPR (clustered regularly interspaced short palindromic repeats)-mediated genome editing showed that isogenic cells with the A/A genotype for rs17514846 had higher FURIN expression levels than the isogenic cells with the C/C genotype. An electrophoretic mobility shift assay exhibited preferential binding of a nuclear protein to the risk allele. Studies of monocytes/macrophages with lentivirus-mediated furin overexpression or shRNA (short hairpin RNA)-induced furin knockdown showed that furin overexpression promoted monocyte/macrophage migration, increased proliferation, and reduced apoptosis whereas furin knockdown had the opposite effects. Conclusions- Our study shows that the CAD-associated genetic variant increases FURIN expression and that furin promotes monocyte/macrophage migration and proliferation while inhibiting apoptosis, providing a biological mechanism for the association between variation at the chromosome 15q26.1 locus and CAD risk.
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Affiliation(s)
- Guojun Zhao
- From the Shantou University Medical College, China (G.Z., W.Y., J.W., B.C., X.Y., S.Y.)
- Department of Histology and Embryology, Guilin Medical University, China (G.Z.)
| | - Wei Yang
- From the Shantou University Medical College, China (G.Z., W.Y., J.W., B.C., X.Y., S.Y.)
| | - Jingchun Wu
- From the Shantou University Medical College, China (G.Z., W.Y., J.W., B.C., X.Y., S.Y.)
| | - Bairu Chen
- From the Shantou University Medical College, China (G.Z., W.Y., J.W., B.C., X.Y., S.Y.)
| | - Xu Yang
- From the Shantou University Medical College, China (G.Z., W.Y., J.W., B.C., X.Y., S.Y.)
| | - Junhui Chen
- Department of Minimally Invasive Intervention, Beijing University Shenzhen Hospital, China (J.C.)
| | - David G. McVey
- Department of Cardiovascular Sciences and NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.G.M., C.A., P.G., T.R.W., N.J.S., S.Y.)
| | - Catherine Andreadi
- Department of Cardiovascular Sciences and NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.G.M., C.A., P.G., T.R.W., N.J.S., S.Y.)
| | - Peng Gong
- Department of Cardiovascular Sciences and NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.G.M., C.A., P.G., T.R.W., N.J.S., S.Y.)
| | - Tom R. Webb
- Department of Cardiovascular Sciences and NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.G.M., C.A., P.G., T.R.W., N.J.S., S.Y.)
| | - Nilesh J. Samani
- From the Shantou University Medical College, China (G.Z., W.Y., J.W., B.C., X.Y., S.Y.)
- Department of Cardiovascular Sciences and NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.G.M., C.A., P.G., T.R.W., N.J.S., S.Y.)
| | - Shu Ye
- Department of Cardiovascular Sciences and NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.G.M., C.A., P.G., T.R.W., N.J.S., S.Y.)
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6
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Cai H, Scott E, Kholghi A, Andreadi C, Rufini A, Karmokar A, Britton RG, Horner-Glister E, Greaves P, Jawad D, James M, Howells L, Ognibene T, Malfatti M, Goldring C, Kitteringham N, Walsh J, Viskaduraki M, West K, Miller A, Hemingway D, Steward WP, Gescher AJ, Brown K. Cancer chemoprevention: Evidence of a nonlinear dose response for the protective effects of resveratrol in humans and mice. Sci Transl Med 2016. [PMID: 26223300 DOI: 10.1126/scitranslmed.aaa7619] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Resveratrol is widely promoted as a potential cancer chemopreventive agent, but a lack of information on the optimal dose prohibits rationally designed trials to assess efficacy. To challenge the assumption that "more is better," we compared the pharmacokinetics and activity of a dietary dose with an intake 200 times higher. The dose-response relationship for concentrations generated and the metabolite profile of [(14)C]-resveratrol in colorectal tissue of cancer patients helped us to define clinically achievable levels. In Apc(Min) mice (a model of colorectal carcinogenesis) that received a high-fat diet, the low resveratrol dose suppressed intestinal adenoma development more potently than did the higher dose. Efficacy correlated with activation of adenosine monophosphate-activated protein kinase (AMPK) and increased expression of the senescence marker p21. Nonlinear dose responses were observed for AMPK and mechanistic target of rapamycin (mTOR) signaling in mouse adenoma cells, culminating in autophagy and senescence. In human colorectal tissues exposed to low dietary concentrations of resveratrol ex vivo, we measured enhanced AMPK phosphorylation and autophagy. The expression of the cytoprotective NAD(P)H dehydrogenase, quinone 1 (NQO1) enzyme was also increased in tissues from cancer patients participating in our [(14)C]-resveratrol trial. These findings warrant a revision of developmental strategies for diet-derived agents designed to achieve cancer chemoprevention.
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Affiliation(s)
- Hong Cai
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Edwina Scott
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Abeer Kholghi
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Catherine Andreadi
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Alessandro Rufini
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Ankur Karmokar
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Robert G Britton
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Emma Horner-Glister
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Peter Greaves
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Dhafer Jawad
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Mark James
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Lynne Howells
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Ted Ognibene
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94551, USA
| | - Michael Malfatti
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94551, USA
| | - Christopher Goldring
- MRC Centre for Drug Safety Science, Department of Pharmacology and Therapeutics, University of Liverpool, Sherrington Building, Ashton Street, Liverpool L69 3GE, UK
| | - Neil Kitteringham
- MRC Centre for Drug Safety Science, Department of Pharmacology and Therapeutics, University of Liverpool, Sherrington Building, Ashton Street, Liverpool L69 3GE, UK
| | - Joanne Walsh
- MRC Centre for Drug Safety Science, Department of Pharmacology and Therapeutics, University of Liverpool, Sherrington Building, Ashton Street, Liverpool L69 3GE, UK
| | - Maria Viskaduraki
- Bioinformatics and Biostatistics Support Hub, University of Leicester, Maurice Shock Building, Leicester LE1 9HN, UK
| | - Kevin West
- University Hospitals of Leicester NHS Trust, Leicester LE1 5WW, UK
| | - Andrew Miller
- University Hospitals of Leicester NHS Trust, Leicester LE1 5WW, UK
| | - David Hemingway
- University Hospitals of Leicester NHS Trust, Leicester LE1 5WW, UK
| | - William P Steward
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Andreas J Gescher
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK
| | - Karen Brown
- Cancer Chemoprevention Group, Department of Cancer Studies, University of Leicester, Leicester LE2 7LX, UK.
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Andreadi C, Britton RG, Patel KR, Brown K. Resveratrol-sulfates provide an intracellular reservoir for generation of parent resveratrol, which induces autophagy in cancer cells. Autophagy 2014; 10:524-5. [PMID: 24419144 DOI: 10.4161/auto.27593] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Resveratrol has many proposed health benefits, including the prevention of cancers, but its low bioavailability is considered a limiting factor in translating these effects to humans. Based on in vivo and clinical studies we have shown that resveratrol is indeed rapidly metabolized by phase II enzymes, and that resveratrol sulfates are deconjugated by steroid sulfatases to afford free resveratrol in vitro and in vivo and hence act as an intracellular reservoir for resveratrol. Further, we have demonstrated that at clinically achievable concentrations of resveratrol sulfate, parent resveratrol is regenerated within human colorectal cancer, but not normal epithelial cells, and is responsible for inducing autophagy with senescence selectively in cancer cells.
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Affiliation(s)
- Catherine Andreadi
- Department of Cancer Studies and Molecular Medicine; University of Leicester; Leicester, UK
| | - Robert G Britton
- Department of Cancer Studies and Molecular Medicine; University of Leicester; Leicester, UK
| | - Ketan R Patel
- Department of Cancer Studies and Molecular Medicine; University of Leicester; Leicester, UK
| | - Karen Brown
- Department of Cancer Studies and Molecular Medicine; University of Leicester; Leicester, UK
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Patel KR, Andreadi C, Britton RG, Horner-Glister E, Karmokar A, Sale S, Brown VA, Brenner DE, Singh R, Steward WP, Gescher AJ, Brown K. Sulfate metabolites provide an intracellular pool for resveratrol generation and induce autophagy with senescence. Sci Transl Med 2013; 5:205ra133. [PMID: 24089405 DOI: 10.1126/scitranslmed.3005870] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The phytochemical resveratrol has been shown to exert numerous health benefits in preclinical studies, but its rapid metabolism and resulting poor bioavailability may limit translation of these effects to humans. Resveratrol metabolites might contribute to in vivo activity through regeneration of the parent compound. We present quantitation of sulfate and glucuronide conjugates of resveratrol in human plasma and tissue after repeated ingestion of resveratrol by volunteers and cancer patients, respectively. Subsequent pharmacokinetic characterization of a mixture of resveratrol-3-O-sulfate and resveratrol-4'-O-sulfate in mice showed that these metabolites are absorbed orally but have low bioavailabilities of ~14 and 3%, respectively. Sulfate hydrolysis in vivo liberated free resveratrol, which accounted for ~2% of the total resveratrol species present in mouse plasma. Monosulfate metabolites were also converted to the parent in human colorectal cells. The extent of cellular uptake was dependent on specific membrane transporters and dictated antiproliferative activity. Sulfate metabolites induced autophagy and senescence in human cancer cells; these effects were abrogated by inclusion of a sulfatase inhibitor, which reduced intracellular resveratrol. Together, our findings suggest that resveratrol is delivered to target tissues in a stable sulfate-conjugated form and that the parent compound is gradually regenerated in selected cells and may give rise to the beneficial effects in vivo. At doses considered to be safe in humans, resveratrol generated via this route may be of greater importance than the unmetabolized form.
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Affiliation(s)
- Ketan R Patel
- Department of Cancer Studies and Molecular Medicine, University of Leicester, Leicester LE2 7LX, UK
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Andreadi C, Cheung LK, Giblett S, Patel B, Jin H, Mercer K, Kamata T, Lee P, Williams A, McMahon M, Marais R, Pritchard C. The intermediate-activity (L597V)BRAF mutant acts as an epistatic modifier of oncogenic RAS by enhancing signaling through the RAF/MEK/ERK pathway. Genes Dev 2012; 26:1945-58. [PMID: 22892241 PMCID: PMC3435497 DOI: 10.1101/gad.193458.112] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Accepted: 07/18/2012] [Indexed: 12/19/2022]
Abstract
(L597V)BRAF mutations are acquired somatically in human cancer samples and are frequently coincident with RAS mutations. Germline (L597V)BRAF mutations are also found in several autosomal dominant developmental conditions known as RASopathies, raising the important question of how the same mutation can contribute to both pathologies. Using a conditional knock-in mouse model, we show that endogenous expression of (L597V)Braf leads to approximately twofold elevated Braf kinase activity and weak activation of the Mek/Erk pathway. This is associated with induction of RASopathy hallmarks including cardiac abnormalities and facial dysmorphia but is not sufficient for tumor formation. We combined (L597V)Braf with (G12D)Kras and found that (L597V)Braf modified (G12D)Kras oncogenesis such that fibroblast transformation and lung tumor development were more reminiscent of that driven by the high-activity (V600E)Braf mutant. Mek/Erk activation levels were comparable with those driven by (V600E)Braf in the double-mutant cells, and the gene expression signature was more similar to that induced by (V600E)Braf than (G12D)Kras. However, unlike (V600E)Braf, Mek/Erk pathway activation was mediated by both Craf and Braf, and ATP-competitive RAF inhibitors induced paradoxical Mek/Erk pathway activation. Our data show that weak activation of the Mek/Erk pathway underpins RASopathies, but in cancer, (L597V)Braf epistatically modifies the transforming effects of driver oncogenes.
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Affiliation(s)
- Catherine Andreadi
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
| | - Lai-Kay Cheung
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
| | - Susan Giblett
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
| | - Bipin Patel
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
| | - Hong Jin
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
| | - Kathryn Mercer
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
| | - Tamihiro Kamata
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
| | - Pearl Lee
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
| | - Alexander Williams
- Bioinformatics Core, Gladstone Institute, University of California at San Francisco, San Francisco, California 94158, USA
| | - Martin McMahon
- Helen Diller Family Comprehensive Cancer Center, Department of Cell and Molecular Pharmacology, University of California at San Francisco, San Francisco, California 94143, USA
| | - Richard Marais
- Signal Transduction Team, The Institute of Cancer Research, Cancer Research UK Centre of Cell and Molecular Biology, London SW3 6JB, United Kingdom
| | - Catrin Pritchard
- Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom
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Cheung L, Andreadi C, Kamata T, Giblett S, Patel B, Marais R, Pritchard C. 168 L597VBRAF Acts as an Epistatic Modifier of G12DKRAS. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)70867-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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