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Makhani K, Chiavatti C, Negro Silva LF, Lemaire M, Bolt AM, De Jay N, Giles B, Zengin AN, Kleinman CL, Mann KK. Arsenic causes distinct gene expression changes in macrophages polarized in vitro with either interferon-γ or interleukin-4. Toxicol Sci 2023; 192:83-96. [PMID: 36617169 DOI: 10.1093/toxsci/kfad001] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Indexed: 01/09/2023] Open
Abstract
Arsenic exposure is correlated with atherosclerosis in epidemiological studies and in animal models. We have previously shown that arsenic exposure enhanced the atherosclerotic plaque size, increased the plaque lipid content, and decreased the plaque smooth muscle cell and collagen contents in the apolipoprotein E knockout (apoE-/-) mice. However, the percentage of plaque-resident macrophages, the primary drivers of atherosclerosis remained unchanged. Therefore, we hypothesized that although arsenic does not change the quantity of macrophages, it alters the macrophage transcriptome towards a proatherogenic state. To test this hypothesis, we used bone marrow-derived macrophages, polarized them to either interferon-γ (IFN-ɣ) stimulated, proinflammatory or interleukin-4 (IL-4) stimulated, alternatively activated macrophages in the presence or absence of 0.67 µM (50 ppb) arsenic and performed RNA sequencing. Arsenic exposure altered the gene expression of the macrophages in a subtype-specific manner. Most differentially expressed genes (88%) were altered specifically in either IFN-ɣ- or IL-4-stimulated macrophages, whereas in the remaining 12% of genes that changed in both cell types, did so in opposite directions. In IL-4-stimulated macrophages, arsenic significantly downregulated the genes involved in cholesterol biosynthesis and the chemokines CCL17/CCL22, whereas in IFN-ɣ-stimulated macrophages, the genes associated with the liver X receptor (LXR) pathway were downregulated by arsenic. Using a bone marrow transplant experiment, we validated that the deletion of LXRα from the hematopoietic compartment rescued arsenic-enhanced atherosclerosis in the apoE-/- mouse model. Together, these data suggest that arsenic modulates subtype-specific transcriptomic changes in macrophages and further emphasize the need to define macrophage heterogeneity in atherosclerotic plaques in order to evaluate the proatherogenic role of arsenic.
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Affiliation(s)
- Kiran Makhani
- Division of Experimental Medicine, McGill University, Montréal, QC H4A 3J1, Canada
| | - Chris Chiavatti
- Division of Experimental Medicine, McGill University, Montréal, QC H4A 3J1, Canada
| | | | - Maryse Lemaire
- Department of Oncology, McGill University, Montréal, QC H4A 3T2, Canada
| | - Alicia M Bolt
- Department of Oncology, McGill University, Montréal, QC H4A 3T2, Canada
| | - Nicolas De Jay
- Department of Human Genetics, McGill University, Montréal, QC H3A 0C7, Canada
| | - Braeden Giles
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 1Y6, Canada
| | - Ayse Nazli Zengin
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 1Y6, Canada
| | - Claudia L Kleinman
- Department of Human Genetics, McGill University, Montréal, QC H3A 0C7, Canada
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, QC H3T 1E2, Canada
| | - Koren K Mann
- Division of Experimental Medicine, McGill University, Montréal, QC H4A 3J1, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 1Y6, Canada
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, QC H3T 1E2, Canada
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Lemaire M, Raffray M, Siebert M, Vigneau C, Vabret E. Facteurs influençant le choix de la technique de dialyse par les patients insuffisants rénaux chroniques stade V. Nephrol Ther 2022. [DOI: 10.1016/j.nephro.2022.07.067] [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: 10/14/2022]
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Negro Silva LF, Makhani K, Lemaire M, Lemarié CA, Plourde D, Bolt AM, Chiavatti C, Bohle DS, Lehoux S, Goldberg MS, Mann KK. Sex-Specific Effects of Prenatal and Early Life Inorganic and Methylated Arsenic Exposure on Atherosclerotic Plaque Development and Composition in Adult ApoE-/- Mice. Environ Health Perspect 2021; 129:57008. [PMID: 34014776 PMCID: PMC8136521 DOI: 10.1289/ehp8171] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 02/26/2021] [Accepted: 03/19/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Epidemiologic studies indicate that early life arsenic exposures are linked to an increased risk of cardiovascular diseases. Different oxidation and methylation states of arsenic exist in the environment and are formed in vivo via the action of arsenic (+3 oxidation state) methyltransferase (As3MT). Methylated arsenicals are pro-atherogenic postnatally, but pre- and perinatal effects are unclear. This is particularly important because methylated arsenicals are known to cross the placenta. OBJECTIVES We tested the effects of early life exposure to inorganic and methylated arsenicals on atherosclerotic plaque formation and its composition in apolipoprotein E knock-out (apoE-/-) mice and evaluated whether apoE-/- mice lacking As3MT expression were susceptible to this effect. METHODS We exposed apoE-/- or apoE-/-/As3MT-/- mice to 200 ppb inorganic or methylated arsenic in the drinking water from conception to weaning and assessed atherosclerotic plaques in the offspring at 18 wk of age. Mixed regression models were used to estimate the mean difference in each outcome relative to controls, adjusting for sex and including a random effects term to account for within-litter clustering. RESULTS Early life exposure to inorganic arsenic, and more profoundly methylated arsenicals, resulted in significantly larger plaques in the aortic arch and sinus in both sexes. Lipid levels in these plaques were higher without a substantial difference in macrophage numbers. Smooth muscle cell content was not altered, but collagen content was lower. Importantly, there were sex-specific differences in these observations, where males had higher lipids and lower collagen in the plaque, but females did not. In mice lacking As3MT, arsenic did not alter the plaque size, although the size was highly variable. In addition, control apoE-/-/As3MT-/- mice had significantly larger plaque size compared with control apoE-/-. CONCLUSION This study shows that early life exposure to inorganic and methylated arsenicals is pro-atherogenic with sex-specific differences in plaque composition and a potential role for As3MT in mice. https://doi.org/10.1289/EHP8171.
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Affiliation(s)
| | - Kiran Makhani
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
| | - Maryse Lemaire
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
| | - Catherine A. Lemarié
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
- EA3878, European University of Occidental Brittany, Brest, France
- UMR 1078, Institut national de la santé et de la recherché médicale, Brest, France
| | - Dany Plourde
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
| | - Alicia M. Bolt
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
| | - Christopher Chiavatti
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
| | - D. Scott Bohle
- Department of Chemistry, McGill University, Montreal, Quebec, Canada
| | - Stéphanie Lehoux
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
| | - Mark S. Goldberg
- Department of Medicine, McGill University, Montreal, Quebec, Canada
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada
- Division of Clinical Epidemiology, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Koren K. Mann
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
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Makhani K, Chiavatti C, Plourde D, Negro Silva LF, Lemaire M, Lemarié CA, Lehoux S, Mann KK. Using the Apolipoprotein E Knock-Out Mouse Model to Define Atherosclerotic Plaque Changes Induced by Low Dose Arsenic. Toxicol Sci 2019; 166:213-218. [PMID: 30376133 DOI: 10.1093/toxsci/kfy201] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Arsenic exposure increases the risk of atherosclerosis, the gradual occlusion of the large arteries with fibro-fatty plaque. While epidemiologic data provide convincing evidence this is true at higher exposures, it is unclear whether this may occur at low arsenic exposures, near the maximum contaminant level of 10 ppb. We have previously shown that 200 ppb arsenite in the drinking water increased the atherosclerosis in apolipoprotein E knock-out (apoE-/-) mice after 13 weeks, but the effects of lower concentrations were unknown. Therefore, here, we analyzed the effects of oral exposure to arsenite from 10 to 200 ppb after 13 weeks. Importantly, we found that even at the lowest concentration of arsenite, there was a significant increase in atherosclerotic plaque size. In our previous studies, we found that arsenite exposure resulted in decreased smooth muscle cells (SMCs) and collagen within the plaque. This change is indicative of a less stable phenotype that could increase the risk of rupture and subsequently, myocardial infarct or stroke in humans. In addition, we observed that lipid increased within the plaque without concomitant increase in macrophage content, suggesting that the macrophages were retaining more lipid intracellularly. We also assessed these plaque components in apoE-/- mice exposed to 10-200 ppb arsenite. Interestingly, we observed that macrophage lipid accumulation occurred at lower concentrations than the decreased SMC/collagen content. Together these data suggest that in the apoE-/- model, low arsenite concentrations are pro-atherogenic and that macrophage lipid homeostasis is more sensitive to arsenite-induced perturbation than the SMCs.
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Affiliation(s)
- Kiran Makhani
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Division of Experimental Medicine, Montreal, Quebec, Canada
| | - Christopher Chiavatti
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Division of Experimental Medicine, Montreal, Quebec, Canada
| | - Dany Plourde
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
| | - Luis Fernando Negro Silva
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Division of Experimental Medicine, Montreal, Quebec, Canada
| | - Maryse Lemaire
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Oncology, Montreal, Quebec, Canada
| | - Catherine A Lemarié
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Stephanie Lehoux
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Division of Experimental Medicine, Montreal, Quebec, Canada.,Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Koren K Mann
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Division of Experimental Medicine, Montreal, Quebec, Canada.,Department of Oncology, Montreal, Quebec, Canada
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Laurent V, Uzel A, Hélaine V, Nauton L, Traïkia M, Gefflaut T, Salanoubat M, de Berardinis V, Lemaire M, Guérard‐Hélaine C. Exploration of Aldol Reactions Catalyzed by Stereoselective Pyruvate Aldolases with 2‐Oxobutyric Acid as Nucleophile. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900128] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- V. Laurent
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - A. Uzel
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - V. Hélaine
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - L. Nauton
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - M. Traïkia
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - T. Gefflaut
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - M. Salanoubat
- Génomique Métabolique, Génoscope, Institut François Jacob, CEA, CNRS, Univ. EvryUniversité Paris-Saclay 91057 Evry France
| | - V. de Berardinis
- Génomique Métabolique, Génoscope, Institut François Jacob, CEA, CNRS, Univ. EvryUniversité Paris-Saclay 91057 Evry France
| | - M. Lemaire
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - C. Guérard‐Hélaine
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
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Lemaire M, Boudry G, Ménard O, Le Ruyet P, Baudry C, Gérard P, Dupont D, Deglaire A, Le Huërou-Luron I, Blat S. La matière grasse laitière et le probiotique L. fermentum incorporés dans des préparations pour nourrissons modulent leur digestion ainsi que la composition du microbiote et les propriétés barrière de l’intestin chez le mini-porc. NUTR CLIN METAB 2019. [DOI: 10.1016/j.nupar.2019.01.401] [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: 11/25/2022]
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Michiels L, Lemaire M, Moraine JJ, Preiser JC. Évolution de la dépense énergétique des patients de soins intensifs au cours de la mobilisation sur cycloergomètre. NUTR CLIN METAB 2018. [DOI: 10.1016/j.nupar.2018.09.135] [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: 11/24/2022]
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Lemaire M, Dou S, Cahu A, Romé V, Canlet C, Tremblay-Franco M, Rhimi M, Cuinet I, Le Ruyet P, Baudry C, Gérard P, Blat S, Le Huërou-Luron I. La matière grasse laitière et le probiotique L. fermentum CECT 5716 incorporés dans des formules infantiles programment la composition du microbiote et la fonction endocrine intestinale dans un modèle miniporc. NUTR CLIN METAB 2018. [DOI: 10.1016/j.nupar.2018.09.194] [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: 10/27/2022]
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9
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Wever CM, Geoffrion D, Grande BM, Yu S, Alcaide M, Lemaire M, Riazalhosseini Y, Hébert J, Gavino C, Vinh DC, Petrogiannis-Haliotis T, Dmitrienko S, Mann KK, Morin RD, Johnson NA. The genomic landscape of two Burkitt lymphoma cases and derived cell lines: comparison between primary and relapse samples. Leuk Lymphoma 2018; 59:2159-2174. [PMID: 29295643 DOI: 10.1080/10428194.2017.1413186] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 12/30/2022]
Abstract
Relapse occurs in 10-40% of Burkitt lymphoma (BL) patients that have completed intensive chemotherapy regimens and is typically fatal. While treatment-naive BL has been characterized, the genomic landscape of BL at the time of relapse (rBL) has never been reported. Here, we present a genomic characterization of two rBL patients. The diagnostic samples had mutations common in BL, including MYC and CCND3. Additional mutations were detected at relapse, affecting important pathways such as NFκB (IKBKB) and MEK/ERK (NRAS) signaling, glutamine metabolism (SIRT4), and RNA processing (ZFP36L2). Genes implicated in drug resistance were also mutated at relapse (TP53, BAX, ALDH3A1, APAF1, FANCI). This concurrent genomic profiling of samples obtained at diagnosis and relapse has revealed mutations not previously reported in this disease. The patient-derived cell lines will be made available and, along with their detailed genetics, will be a valuable resource to examine the role of specific mutations in therapeutic resistance.
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Affiliation(s)
- Claudia M Wever
- a Department of Medicine , McGill University, Lady Davis Institute, Jewish General Hospital , Montreal , Canada.,b Lady Davis Institute, Jewish General Hospital , Montreal , Canada
| | | | - Bruno M Grande
- c Department of Molecular Biology and Biochemistry , Simon Fraser University , Burnaby , Canada.,d Genome Sciences Centre, BC Cancer Agency , Vancouver , Canada
| | - Stephen Yu
- c Department of Molecular Biology and Biochemistry , Simon Fraser University , Burnaby , Canada
| | - Miguel Alcaide
- c Department of Molecular Biology and Biochemistry , Simon Fraser University , Burnaby , Canada
| | - Maryse Lemaire
- b Lady Davis Institute, Jewish General Hospital , Montreal , Canada
| | - Yasser Riazalhosseini
- e Department of Human Genetics , McGill University , Montreal , Canada.,f McGill University and Genome Quebec Innovation Centre , Montreal , Canada
| | - Josée Hébert
- g Department of Medicine, Faculty of Medicine , Université de Montréal , Montreal , Canada.,h Research Centre and Division of Hematology-Oncology Maisonneuve-Rosemont Hospital , The Québec Leukemia Cell Bank , Montreal , Canada
| | - Christina Gavino
- i Infectious Disease Susceptibility Program (Research Institute-McGill University Health Centre) , Montreal , Canada.,j Department of Medicine , Medical Microbiology and Human Genetics (McGill University Health Centre) , Montreal , Canada
| | - Donald C Vinh
- i Infectious Disease Susceptibility Program (Research Institute-McGill University Health Centre) , Montreal , Canada.,j Department of Medicine , Medical Microbiology and Human Genetics (McGill University Health Centre) , Montreal , Canada
| | | | | | - Koren K Mann
- a Department of Medicine , McGill University, Lady Davis Institute, Jewish General Hospital , Montreal , Canada.,b Lady Davis Institute, Jewish General Hospital , Montreal , Canada
| | - Ryan D Morin
- c Department of Molecular Biology and Biochemistry , Simon Fraser University , Burnaby , Canada.,d Genome Sciences Centre, BC Cancer Agency , Vancouver , Canada
| | - Nathalie A Johnson
- a Department of Medicine , McGill University, Lady Davis Institute, Jewish General Hospital , Montreal , Canada.,b Lady Davis Institute, Jewish General Hospital , Montreal , Canada
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Negro Silva LF, Lemaire M, Lemarié CA, Plourde D, Bolt AM, Chiavatti C, Bohle DS, Slavkovich V, Graziano JH, Lehoux S, Mann KK. Effects of Inorganic Arsenic, Methylated Arsenicals, and Arsenobetaine on Atherosclerosis in the Mouse Model and the Role of As3mt-Mediated Methylation. Environ Health Perspect 2017; 125:077001. [PMID: 28728140 PMCID: PMC5744679 DOI: 10.1289/ehp806] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 12/21/2016] [Accepted: 12/21/2016] [Indexed: 05/03/2023]
Abstract
BACKGROUND Arsenic is metabolized through a series of oxidative methylation reactions by arsenic (3) methyltransferase (As3MT) to yield methylated intermediates. Although arsenic exposure is known to increase the risk of atherosclerosis, the contribution of arsenic methylation and As3MT remains undefined. OBJECTIVES Our objective was to define whether methylated arsenic intermediates were proatherogenic and whether arsenic biotransformation by As3MT was required for arsenic-enhanced atherosclerosis. METHODS We utilized the apoE−/− mouse model to compare atherosclerotic plaque size and composition after inorganic arsenic, methylated arsenical, or arsenobetaine exposure in drinking water. We also generated apoE−/−/As3mt−/− double knockout mice to test whether As3MT-mediated biotransformation was required for the proatherogenic effects of inorganic arsenite. Furthermore, As3MT expression and function were assessed in in vitro cultures of plaque-resident cells. Finally, bone marrow transplantation studies were performed to define the contribution of As3MT-mediated methylation in different cell types to the development of atherosclerosis after inorganic arsenic exposure. RESULTS We found that methylated arsenicals, but not arsenobetaine, are proatherogenic and that As3MT is required for arsenic to induce reactive oxygen species and promote atherosclerosis. Importantly, As3MT was expressed and functional in multiple plaque-resident cell types, and transplant studies indicated that As3MT is required in extrahepatic tissues to promote atherosclerosis. CONCLUSION Taken together, our findings indicate that As3MT acts to promote cardiovascular toxicity of arsenic and suggest that human AS3MT SNPs that correlate with enzyme function could predict those most at risk to develop atherosclerosis among the millions that are exposed to arsenic. https://doi.org/10.1289/EHP806.
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Affiliation(s)
| | - Maryse Lemaire
- Lady Davis Institute for Medical Research
- Department of Oncology
| | | | | | - Alicia M Bolt
- Lady Davis Institute for Medical Research
- Department of Oncology
| | | | - D Scott Bohle
- Department of Chemistry, McGill University, Montréal, Québec, Canada
| | - Vesna Slavkovich
- Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Joseph H Graziano
- Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Stéphanie Lehoux
- Lady Davis Institute for Medical Research
- Division of Experimental Medicine
- Department of Medicine, and
| | - Koren K Mann
- Lady Davis Institute for Medical Research
- Division of Experimental Medicine
- Department of Oncology
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Wever CM, Lemaire M, Vinh DC, Hébert J, Riazalhosseini Y, Morin R, Johnson NA. Abstract 2447: The mutational landscape of chemo-refractory Burkitt lymphoma. Cancer Res 2017. [DOI: 10.1158/1538-7445.am2017-2447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Burkitt Lymphoma (BL) is characterized by rapid cellular proliferation driven by the canonical IG-MYC translocation. BL can evade apoptosis by silencing the tumor suppressor TP53 or by mutating MYC. Other mutations contribute to the pathogenesis of BL, including TCF3 or ID3, which stimulate PI3K/MAPK/MTOR signaling, or mutations in CCND3, which accelerate cell cycle progression. While BL is curable in 90% of patients, the prognosis for relapsed BL is dismal. The mutational landscape of relapsed BL (rBL) is not well characterized because it is rarely re-biopsied at the time of relapse. Two young men at our institution experienced a BL relapse within 3 months of completing intensive chemotherapy. We hypothesized that mutations implicated in therapeutic resistance would be enriched in the tumor cells taken at the time of relapse. Our aim was to identify these mutations and develop cell lines from these patients to study these tumours in more detail.
Methods: Both patients had whole exome sequencing (WES) performed on tumor cells obtained at the time of diagnosis (T1) and relapse (T2), using unaffected peripheral blood to exclude germline variants. The novel cell lines (CL) derived from T2 were also sequenced and karyotyped.
Results: The total number of coding mutations in patient 509 was: T1 = 78, T2 = 84 and CL= 63, and in patient 533: T1= 43, T2 = 66 and CL= 70. All samples had multiple missense mutations (5 to 7) in MYC and had evidence of clonal heterogeneity. Patient 509 had a TP53 (R248) mutation that was clearly selected for during chemotherapy, where the variant allele fraction (VAF) increased from 2% at T1 to 93% at T2. 19 genes had acquired missense mutations at T2 including: CD14, GSTM3, BCR and ELMO3. The following genomic rearrangements were observed in the 509CL by karyotype:-Y,t(8;14)(q24.21;q32),der(10)t(10;22)(p1?3;q11.2),t(13;17)(q3?2;q11.2), del(17)(p11.2) and -22. Patient 533 had multiple frameshift mutations that occurred in all three samples (T1, T2 and CL), including in CCND3, BAX, ARID1A, ARID1B, DDX5, DETD1B, TSFM, SP3 and TFAP4. T2 and the CL had additional acquired missense or nonsense mutations in ZFP36L2, CCL7, FAM13C and IKBKB. The 533CL had 3 dominant clones by karytope, The rearrangements observed were: del(2)(p21p23), t(8;14)(q24.21;q32) ,t(1;12)(q12;q24) and +7. The frameshift mutations in ZFP36L2 and BAX were homozygous in the 533CL.
Conclusions: Multiple genes are implicated in the pathogenesis of chemotherapy-resistant BL, many of which had not been appreciated in studies focused on sequencing de novo BL (e.g. BAX, ARID1A). To our knowledge, these are the first BL cell lines that have been well-characterized with respect to the serial acquisition of mutations after exposure to chemotherapy and with knowledge of germline variants. These are useful resources to study oncogene cooperation, clonal evolution, chromatin remodelling (ARID1A), RNA processing (DDX5, ZFP36L2) and apoptosis (P53 and BAX null) in BL.
Citation Format: Claudia M. Wever, Maryse Lemaire, Donald C. Vinh, Josée Hébert, Yasser Riazalhosseini, Ryan Morin, Nathalie A. Johnson. The mutational landscape of chemo-refractory Burkitt lymphoma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 2447. doi:10.1158/1538-7445.AM2017-2447
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Affiliation(s)
| | | | | | - Josée Hébert
- 2Université de Montréal, Montreal, Quebec, Canada
| | | | - Ryan Morin
- 3Simon Fraser University, British Columbia, Canada
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Schulz E, Bethmont V, Fahmi K, Fache F, Lemaire M. Synthèse et polymérisation de thiophènes substitués en 3 par des chaînes alkyles chirales. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1995920783] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Garreau R, Roncali J, Garnier F, Lemaire M. Réduction des contraintes stériques (empêchement à la conjugaison) dans les poly(dialkyl-3,4-thiophènes). ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1989860093] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Lemaire M, Delabouglise D, Garreau R, Roncali J. Synthèse et propriétés des deux formes énantiomères de poly(thiophènes) chiraux. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1989860193] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Lemaire M, Lucidi V, Katsanos G, Bouazza F, Gomez Galdon M, Larsimont D, Delatte P, Vouche M, Hendlisz A, Flamen P, Donckier V. Feasibility and safety of a therapeutic strategy using selective transarterial radioembolization followed by surgery for hepatocellular carcinoma in cirrhotic patients. Eur J Cancer 2017. [DOI: 10.1016/s0959-8049(17)30358-1] [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: 11/29/2022]
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Barba E, Lemaire M, Chase G, Desaive T, Preiser JC. Effet de la mobilisation sur l’insulinosensibilité des patients de soins intensifs. NUTR CLIN METAB 2016. [DOI: 10.1016/j.nupar.2016.09.038] [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: 10/20/2022]
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Affiliation(s)
- J Lavaur
- Institut National de la Santé et de la Recherche Médicale, U 1127, CNRS, Unité Mixte de Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - M Lemaire
- Air Liquide Healthcare, Medical R&D Paris, Saclay Research Center, Jouy-en Josas, France
| | - J Pype
- Air Liquide Healthcare, Medical R&D Paris, Saclay Research Center, Jouy-en Josas, France
| | - D Le Nogue
- Institut National de la Santé et de la Recherche Médicale, U 1127, CNRS, Unité Mixte de Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - E C Hirsch
- Institut National de la Santé et de la Recherche Médicale, U 1127, CNRS, Unité Mixte de Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - P P Michel
- Institut National de la Santé et de la Recherche Médicale, U 1127, CNRS, Unité Mixte de Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
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Bolt AM, Grant MP, Wu TH, Flores Molina M, Plourde D, Kelly ADR, Negro Silva LF, Lemaire M, Schlezinger JJ, Mwale F, Mann KK. Tungsten Promotes Sex-Specific Adipogenesis in the Bone by Altering Differentiation of Bone Marrow-Resident Mesenchymal Stromal Cells. Toxicol Sci 2016; 150:333-46. [PMID: 26865663 DOI: 10.1093/toxsci/kfw008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 01/09/2023] Open
Abstract
Tungsten is a naturally occurring metal that increasingly is being incorporated into industrial goods and medical devices, and is recognized as an emerging contaminant. Tungsten preferentially and rapidly accumulates in murine bone in a concentration-dependent manner; however the effect of tungsten deposition on bone biology is unknown. Other metals alter bone homeostasis by targeting bone marrow-derived mesenchymal stromal cell (MSC) differentiation, thus, we investigated the effects of tungsten on MSCsin vitroandin vivoIn vitro, tungsten shifted the balance of MSC differentiation by enhancing rosiglitazone-induced adipogenesis, which correlated with an increase in adipocyte content in the bone of tungsten-exposed, young, male mice. Conversely, tungsten inhibited osteogenesis of MSCsin vitro; however, we found no evidence that tungsten inhibited osteogenesisin vivo Interestingly, two factors known to influence adipogenesis are sex and age of mice. Both female and older mice have enhanced adipogenesis. We extended our study and exposed young female and adult (9-month) male and female mice to tungsten for 4 weeks. Although tungsten accumulated to a similar extent in young female mice, it did not promote adipogenesis. Interestingly, tungsten did not accumulate in the bone of older mice; it was undetectable in adult male mice, and just above the limit of detect in adult female mice. Surprisingly, tungsten enhanced adipogenesis in adult female mice. In summary, we found that tungsten alters bone homeostasis by altering differentiation of MSCs, which could have significant implications for bone quality, but is highly dependent upon sex and age.
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Affiliation(s)
- Alicia M Bolt
- *Lady Davis Institute for Medical Research; Department of Oncology
| | | | - Ting Hua Wu
- *Lady Davis Institute for Medical Research; Division of Experimental Medicine
| | | | | | | | | | - Maryse Lemaire
- *Lady Davis Institute for Medical Research; Department of Oncology
| | - Jennifer J Schlezinger
- Department of Environmental Health, Boston University School of Public Health, Boston, Massachusetts, USA
| | - Fackson Mwale
- *Lady Davis Institute for Medical Research; Faculty of Medicine; Department of Surgery, McGill University, Montréal, Québec, Canada; and
| | - Koren K Mann
- *Lady Davis Institute for Medical Research; Department of Oncology; Division of Experimental Medicine;
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Silva LN, Lemaire M, Plourde D, Lemarié C, Lehoux S, Mann K. Prenatal exposure to methylated arsenicals enhances atherosclerosis in the ApoE−/− mouse model. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.753] [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: 11/15/2022]
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Lemaire M, El-Hage W, Frangou S. Increased affective reactivity to neutral stimuli and decreased maintenance of affective responses in bipolar disorder. Eur Psychiatry 2015; 30:852-60. [PMID: 26443053 DOI: 10.1016/j.eurpsy.2015.07.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 07/11/2015] [Accepted: 07/12/2015] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Affective dysregulation is a core feature of bipolar disorder (BD) and a significant predictor of clinical and functional outcome. Affective dysregulation can arise from abnormalities in multiple processes. This study addresses the knowledge gap regarding the precise nature of the processes that may be dysregulated in BD and their relationship to the clinical expression of the disorder. METHODS Patients with BD (n=45) who were either in remission or in a depressive or manic state and healthy individuals (n=101) were compared in terms of the intensity, duration and physiological response (measured using inter-beat intervals and skin conductance) to affective and neutral pictures during passive viewing and during experiential suppression. RESULTS Compared to healthy individuals, patients with BD evidenced increased affective reactivity to neutral pictures and reduced maintenance of subjective affective responses to all pictures. This pattern was present irrespective of clinical state but was more pronounced in symptomatic patients, regardless of polarity. Patients, regardless of symptomatic status, were comparable to healthy individuals in terms of physiological arousal and voluntary control of affective responses. CONCLUSION Our study demonstrates that increased affective reactivity to neutral stimuli and decreased maintenance of affective responses are key dimensions of affective dysregulation in BD.
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Affiliation(s)
- M Lemaire
- UMR Inserm U930, University François-Rabelais, Tours, France; CHRU Tours, Department of Child Psychiatry, Tours, France
| | - W El-Hage
- UMR Inserm U930, University François-Rabelais, Tours, France; CHRU Tours, Department of Adult Psychiatry (CPU), Tours, France
| | - S Frangou
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, USA.
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Lemaire M, Negro Silva LF, Lemarié CA, Bolt AM, Flores Molina M, Krohn RM, Smits JE, Lehoux S, Mann KK. Arsenic Exposure Increases Monocyte Adhesion to the Vascular Endothelium, a Pro-Atherogenic Mechanism. PLoS One 2015; 10:e0136592. [PMID: 26332580 PMCID: PMC4557830 DOI: 10.1371/journal.pone.0136592] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 08/05/2015] [Indexed: 01/24/2023] Open
Abstract
Epidemiological studies have shown that arsenic exposure increases atherosclerosis, but the mechanisms underlying this relationship are unknown. Monocytes, macrophages and platelets play an important role in the initiation of atherosclerosis. Circulating monocytes and macrophages bind to the activated vascular endothelium and migrate into the sub-endothelium, where they become lipid-laden foam cells. This process can be facilitated by platelets, which favour monocyte recruitment to the lesion. Thus, we assessed the effects of low-to-moderate arsenic exposure on monocyte adhesion to endothelial cells, platelet activation and platelet-monocyte interactions. We observed that arsenic induces human monocyte adhesion to endothelial cells in vitro. These findings were confirmed ex vivo using a murine organ culture system at concentrations as low as 10 ppb. We found that both cell types need to be exposed to arsenic to maximize monocyte adhesion to the endothelium. This adhesion process is specific to monocyte/endothelium interactions. Hence, no effect of arsenic on platelet activation or platelet/leukocyte interaction was observed. We found that arsenic increases adhesion of mononuclear cells via increased CD29 binding to VCAM-1, an adhesion molecule found on activated endothelial cells. Similar results were observed in vivo, where arsenic-exposed mice exhibit increased VCAM-1 expression on endothelial cells and increased CD29 on circulating monocytes. Interestingly, expression of adhesion molecules and increased binding can be inhibited by antioxidants in vitro and in vivo. Together, these data suggest that arsenic might enhance atherosclerosis by increasing monocyte adhesion to endothelial cells, a process that is inhibited by antioxidants.
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Affiliation(s)
- Maryse Lemaire
- Department of Oncology, Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada
| | - Luis Fernando Negro Silva
- Division of Experimental Medicine, Department of Medicine, Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada
| | - Catherine A. Lemarié
- Division of Experimental Medicine, Department of Medicine, Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada
- Department of Medicine, Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada
| | - Alicia M. Bolt
- Department of Oncology, Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada
| | - Manuel Flores Molina
- Department of Oncology, Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada
| | - Regina M. Krohn
- Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Judit E. Smits
- Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Stéphanie Lehoux
- Department of Medicine, Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada
| | - Koren K. Mann
- Department of Oncology, Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada
- * E-mail:
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Krohn RM, Lemaire M, Negro Silva LF, Lemarié C, Bolt A, Mann KK, Smits JE. High-selenium lentil diet protects against arsenic-induced atherosclerosis in a mouse model. J Nutr Biochem 2015; 27:9-15. [PMID: 26500064 DOI: 10.1016/j.jnutbio.2015.07.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 06/24/2015] [Accepted: 07/08/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND Cardiovascular disease (CVD) is a major cause of death worldwide, and arsenic (As) intake, mainly through drinking water, is a well-known risk factor for CVD as well as other health problems. Selenium (Se) is a known antagonist to As toxicity. OBJECTIVE We tested the potential of high-Se lentils from the Canadian prairies as a therapeutic food to alter the outcome of As-enhanced atherosclerosis. MATERIALS AND METHODS Male ApoE(-/-) mice exposed to a moderate level of As (200ppb) in their drinking water, and control mice on tap water received one of three lentil diets: Se-deficient (0.009mg/kg), Se-adequate (0.16mg/kg) or Se-high (0.3mg/kg). After 13weeks, lesion formation in the aortic arch and sinus were assessed. Intralesional cellular composition, serum lipid levels and hepatic oxidative stress were assessed as well. RESULTS Arsenic-exacerbated plaque formation was reduced in the sinus and completely abolished in the aortic arch of mice on the Se-fortified lentil diet, whereas lesions were increased in As-exposed mice on both the Se-deficient and Se-adequate diets. Notably, Se deficiency contributed to proatherogenic composition of serum lipids in As-exposed mice as indicated by high-density lipoprotein:low-density lipoprotein. At least adequate Se status was crucial for counteracting As-induced oxidative stress. CONCLUSION This study is the first to show the potential of high-Se lentils to protect against As-triggered atherosclerosis, and this invites further investigations in human populations at risk from As contamination of their drinking water.
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Affiliation(s)
- Regina M Krohn
- Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, T2N 4Z6, Canada.
| | - Maryse Lemaire
- Department of Oncology, Lady Davis Institute for Medical Research, McGill University, Montréal, H3T 1E2, Canada
| | - Luis F Negro Silva
- Experimental Medicine, Lady Davis Institute for Medical Research, McGill University, Montréal, H3T 1E2, Canada
| | - Catherine Lemarié
- Department of Medicine, Lady Davis Institute for Medical Research, McGill University, Montréal, H3T 1E2, Canada
| | - Alicia Bolt
- Department of Oncology, Lady Davis Institute for Medical Research, McGill University, Montréal, H3T 1E2, Canada
| | - Koren K Mann
- Department of Oncology, Lady Davis Institute for Medical Research, McGill University, Montréal, H3T 1E2, Canada
| | - Judit E Smits
- Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, T2N 4Z6, Canada
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Borrini J, Favre-Reguillon A, Lemaire M, Gracia S, Arrachart G, Bernier G, Hérès X, Hill C, Pellet-Rostaing S. Water Soluble PDCA Derivatives for Selective Ln(III)/An(III) and Am(III)/Cm(III) Separation. Solvent Extraction and Ion Exchange 2014. [DOI: 10.1080/07366299.2014.974449] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bolt AM, Sabourin V, Molina MF, Police AM, Negro Silva LF, Plourde D, Lemaire M, Ursini-Siegel J, Mann KK. Tungsten targets the tumor microenvironment to enhance breast cancer metastasis. Toxicol Sci 2014; 143:165-77. [PMID: 25324207 DOI: 10.1093/toxsci/kfu219] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [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: 11/14/2022] Open
Abstract
The number of individuals exposed to high levels of tungsten is increasing, yet there is limited knowledge of the potential human health risks. Recently, a cohort of breast cancer patients was left with tungsten in their breasts following testing of a tungsten-based shield during intraoperative radiotherapy. While monitoring tungsten levels in the blood and urine of these patients, we utilized the 66Cl4 cell model, in vitro and in mice to study the effects of tungsten exposure on mammary tumor growth and metastasis. We still detect tungsten in the urine of patients' years after surgery (mean urinary tungsten concentration at least 20 months post-surgery = 1.76 ng/ml), even in those who have opted for mastectomy, indicating that tungsten does not remain in the breast. In addition, standard chelation therapy was ineffective at mobilizing tungsten. In the mouse model, tungsten slightly delayed primary tumor growth, but significantly enhanced lung metastasis. In vitro, tungsten did not enhance 66Cl4 proliferation or invasion, suggesting that tungsten was not directly acting on 66Cl4 primary tumor cells to enhance invasion. In contrast, tungsten changed the tumor microenvironment, enhancing parameters known to be important for cell invasion and metastasis including activated fibroblasts, matrix metalloproteinases, and myeloid-derived suppressor cells. We show, for the first time, that tungsten enhances metastasis in an animal model of breast cancer by targeting the microenvironment. Importantly, all these tumor microenvironmental changes are associated with a poor prognosis in humans.
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Affiliation(s)
- Alicia M Bolt
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3 *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
| | - Valérie Sabourin
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
| | - Manuel Flores Molina
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
| | - Alice M Police
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3 *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
| | - Luis Fernando Negro Silva
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3 *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
| | - Dany Plourde
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
| | - Maryse Lemaire
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3 *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
| | - Josie Ursini-Siegel
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3 *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3 *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
| | - Koren K Mann
- *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3 *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3 *Lady Davis Institute for Medical Research, McGill University, Montréal, Québec, Canada, H3T 1E2, Department of Oncology, McGill University, Montréal, Québec, Canada, H2W 1S6, Pacific Breast Care Center, Costa Mesa, California, 92627, Division of Surgical Oncology, University of California, Irvine School of Medicine, Irvine, California, 92627; and Division of Experimental Medicine, McGill University, Montréal, Québec, Canada, H3A 1A3
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Lemaire M, Lemarié CA, Flores Molina M, Guilbert C, Lehoux S, Mann KK. Genetic deletion of LXRα prevents arsenic-enhanced atherosclerosis, but not arsenic-altered plaque composition. Toxicol Sci 2014; 142:477-88. [PMID: 25273567 DOI: 10.1093/toxsci/kfu197] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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: 11/14/2022] Open
Abstract
Arsenic exposure has been linked to an increased incidence of atherosclerosis. Previously, we have shown in vitro and in vivo that arsenic inhibits transcriptional activation of the liver X receptors (LXRs), key regulators of lipid homeostasis. Therefore, we evaluated the role of LXRα in arsenic-induced atherosclerosis using the apoE(-/-) mouse model. Indeed, deletion of LXRα protected apoE(-/-) mice against the proatherogenic effects of arsenic. We have previously shown that arsenic changes the plaque composition in apoE(-/-) mice. Arsenic decreased collagen content in the apoE(-/-) model, and we have observed the same diminution in LXRα(-/-)apoE(-/-) mice. However, the collagen-producing smooth muscle cells (SMCs) were decreased in apoE(-/-), but increased in LXRα(-/-)apoE(-/-). Although transcriptional activation of collagen remained the same in SMC from both genotypes, arsenic-exposed LXRα(-/-)apoE(-/-) plaques had increased matrix metalloproteinase activity compared with both control LXRα(-/-)apoE(-/-) and apoE(-/-), which could be responsible for both the decrease in plaque collagen and the SMC invasion. In addition, arsenic increased plaque lipid accumulation in both genotypes. However, macrophages, the cells known to retain lipid within the plaque, were unchanged in arsenic-exposed apoE(-/-) mice, but decreased in LXRα(-/-)apoE(-/-). We confirmed in vitro that these cells retained more lipid following arsenic exposure and are more sensitive to apoptosis than apoE(-/-). Mice lacking LXRα are resistant to arsenic-enhanced atherosclerosis, but arsenic-exposed LXRα(-/-)apoE(-/-) mice still present a different plaque composition pattern than the arsenic-exposed apoE(-/-) mice.
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Affiliation(s)
- Maryse Lemaire
- *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2 *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2
| | - Catherine A Lemarié
- *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2 *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2
| | - Manuel Flores Molina
- *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2
| | - Cynthia Guilbert
- *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2
| | - Stéphanie Lehoux
- *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2 *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2
| | - Koren K Mann
- *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2 *Department of Oncology, Lady Davis Institute for Medical Research, and Department of Medicine, McGill University, Montréal, Canada H3T 1E2
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Lefort H, Travers S, Ernouf C, Maurin O, Distinguin B, Fontaine E, Lemaire M, Margerin S, Jost D, Tourtier J, Domanski L. The Role of Hemostatic Product-Impregnated Dressings in the Pre-Hospital Control of External Bleeding. Prospective Observational Study. J Emerg Med 2014. [DOI: 10.1016/j.jemermed.2013.11.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Montagut-Romans A, Boulven M, Lemaire M, . Popowycz F. Efficient C-3 reductive alkylation of 4-hydroxycoumarin by dehydrogenative oxidation of benzylic alcohols through ruthenium catalysis. NEW J CHEM 2014. [DOI: 10.1039/c3nj01517c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Lemaire M, Nagnan P, Clement JL, Lange C, Peru L, Basselier JJ. Geranyllinalool (Diterpene Alcohol) : An insecticidal component of pine wood and termites (Isoptera: Rhinotermitidae) in four European ecosystems. J Chem Ecol 2013; 16:2067-79. [PMID: 24264007 DOI: 10.1007/bf01020517] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/1988] [Accepted: 11/28/1989] [Indexed: 11/26/2022]
Abstract
Geranyllinalool is an insecticidal component of pine wood and of the defensive secretion ofReticulitermes species. Lethal doses (LD50) were calculated for termites and various ant species. Termite workers were very resistant (10,000 ppm). Ant resistance varies among species according to their trophic strategy and attack mode. The geranyllinalool acts as a natural insecticide against some ant predators (LD50=6 ppm), which use raid or chemical crypsis to invade termite nests. In contrast, predators laying the venom on the cuticle of their termite prey were very resistant (10,000 ppm). Generally, ants acting as space competitors could detoxify the quantity emitted by one termite soldier (18 ppm).
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Affiliation(s)
- M Lemaire
- Museum Gabriel Foucher, Parc Saint-Paul, 18000, Bourges, France
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Vaglio–Gaudard C, Leray O, Lemaire M, Colombier A, Hudelot J. First feedback with the AMMON integral experiment for the JHR calculations. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134205001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Colombier AC, Amharrak H, Fourmentel D, Ravaux S, Régnier D, Gueton O, Hudelot JP, Lemaire M. Nuclear data production, calculation and measurement: a global overview of the gamma heating issue. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134204001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Simon G, Eljezi T, Legeret B, Charmantray F, Castillo JA, Guérard-Hélaine C, Lemaire M, Bouzon M, Marlière P, Hélaine V, Hecquet L. Synthesis of Specially Designed Probes to Broaden Transketolase Scope. ChemCatChem 2013. [DOI: 10.1002/cctc.201200479] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Audoin B, Crespy L, Zaaraoui W, Lemaire M, Jure L, Rico A, Faivre A, Reuter F, Malikova I, Cozzone P, Ranjeva JP, Pelletier J. Détection des anomalies individuelles de la substance grise au stade précoce de la sclérose en plaques par cartographie statistique des cartes de taux de transfert d’aimantation. Rev Neurol (Paris) 2012. [DOI: 10.1016/j.neurol.2012.01.511] [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: 11/28/2022]
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Irani Y, Pype JL, Martin AR, Chong CF, Daniel L, Gaudart J, Ibrahim Z, Magalon G, Lemaire M, Hardwigsen J. Noble gas (argon and xenon)-saturated cold storage solutions reduce ischemia-reperfusion injury in a rat model of renal transplantation. Nephron Extra 2012; 1:272-82. [PMID: 22470401 PMCID: PMC3290848 DOI: 10.1159/000335197] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Following kidney transplantation, ischemia-reperfusion injury contributes to adverse outcomes. The purpose of this study was to determine whether a cold-storage solution saturated with noble gas (xenon or argon) could limit ischemia-reperfusion injury following cold ischemia. METHODS Sixty Wistar rats were randomly allocated to 4 experimental groups. Kidneys were harvested and then stored for 6 h before transplantation in cold-storage solution (Celsior®) saturated with either air, nitrogen, xenon or argon. A syngenic orthotopic transplantation was performed. Renal function was determined on days 7 and 14 after transplantation. Transplanted kidneys were removed on day 14 for histological and immunohistochemical analyses. RESULTS Creatinine clearance was significantly higher and urinary albumin significantly lower in the argon and xenon groups than in the other groups at days 7 and 14. These effects were considerably more pronounced for argon than for xenon. In addition, kidneys stored with argon, and to a lesser extent those stored with xenon, displayed preserved renal architecture as well as higher CD-10 and little active caspase-3 expression compared to other groups. CONCLUSION Argon- or xenon-satured cold-storage solution preserved renal architecture and function following transplantation by reducing ischemia-reperfusion injury.
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Affiliation(s)
- Y Irani
- Department of Plastic and Reconstructive Surgery, Jouy-en-Josas, France
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Lemaire M, Lemarié CA, Molina MF, Schiffrin EL, Lehoux S, Mann KK. Exposure to moderate arsenic concentrations increases atherosclerosis in ApoE-/- mouse model. Toxicol Sci 2011; 122:211-21. [PMID: 21512104 DOI: 10.1093/toxsci/kfr097] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Arsenic is a widespread environmental contaminant to which millions of people are exposed worldwide. Exposure to arsenic is epidemiologically linked to increased cardiovascular disease, such as atherosclerosis. However, the effects of moderate concentrations of arsenic on atherosclerosis formation are unknown. Therefore, we utilized an in vivo ApoE(-/-) mouse model to assess the effects of chronic moderate exposure to arsenic on plaque formation and composition in order to facilitate mechanistic investigations. Mice exposed to 200 ppb arsenic developed atherosclerotic lesions, a lower exposure than previously reported. In addition, arsenic modified the plaque content, rendering them potentially less stable and consequently, potentially more dangerous. Moreover, we observed that the lower exposure concentration was more atherogenic than the higher concentration. Arsenic-enhanced lesions correlated with several proatherogenic molecular changes, including decreased liver X receptor (LXR) target gene expression and increased proinflammatory cytokines. Significantly, our observations suggest that chronic moderate arsenic exposure may be a greater cardiovascular health risk than previously anticipated.
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Affiliation(s)
- Maryse Lemaire
- Deptartment of Oncology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada
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Czerwinski KR, Draye M, Favre-Réguillon A, Foos J, Guy A, Lemaire M. Ion Selective Resins: Development and Applications for Nuclear Waste Management. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-556-1277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractOrganic based ion selective resins have some similar attributes: case of synthesis, high metal ion complexation ability, and flexibility for different nuclear waste management applications. For most chelating polymers, the ligand is deemed to be of primary importance for the interaction with the targeted metal ion. The role of the polymer matrix is usually ignored. For ion specific resins, the polymer structure is formed to a specific metal ion. Using the molecular imprinting technique, resins can be formed with functional groups and cavities for a target metal ion. Ion selective resins have been developed for the separation of Cs. The methods and concepts used for the development of the Cs specific resins have been applied to the development of selective resins for Eu (a trivalent actinide model). The resulting resins are characterized by FTIR spectroscopy, moisture regain, and ion exchange capacity. The incorporation of 8-hydroxyquinoline into the resin increases selectivity for Eu over La. The results for the Eu study indicate ion specific resins can be developed for the separation of trivalent actinides from nuclear waste.
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Affiliation(s)
- A. Sorin
- Laboratoire de Catalyse et Synthèse Organique, Université Claude Bernard Lyon 1, CPE Lyon, Villeurbanne Cedex, France
| | - S. Pellet-Rostaing
- Laboratoire de Catalyse et Synthèse Organique, Université Claude Bernard Lyon 1, CPE Lyon, Villeurbanne Cedex, France
| | - A. Favre-Reguillon
- Laboratoire de Catalyse et Synthèse Organique, Université Claude Bernard Lyon 1, CPE Lyon, Villeurbanne Cedex, France
| | - M. Lemaire
- Laboratoire de Catalyse et Synthèse Organique, Université Claude Bernard Lyon 1, CPE Lyon, Villeurbanne Cedex, France
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Borrini J, Bernier G, Pellet-Rostaing S, Favre-Reguillon A, Lemaire M. Separation of lanthanides(III) by inorganic nanofiltration membranes using a water soluble complexing agent. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2009.10.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lemaire M, Momparler LF, Farinha NJ, Bernstein M, Momparler RL. Enhancement of Antineoplastic Action of 5-Aza-2′-deoxycytidine by Phenylbutyrate on L1210 Leukemic Cells. Leuk Lymphoma 2009; 45:147-54. [PMID: 15061212 DOI: 10.1080/1042819031000149304] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Epigenetic changes, such as aberrant DNA methylation that silences tumor suppressor genes (TSGs), can play an important role in the development of leukemia. The DNA methylation inhibitor, 5-aza-2'-deoxycytidine (5-AZA-CdR), can reactivate these silent TSGs and is an interesting agent to investigate for therapy of leukemia. It has been reported that the effectiveness of 5-AZA-CdR to reactivate TSG can be enhanced by inhibitors of histone deacetylase (HDIs). HDIs can convert a compact chromatin structure to an open configuration that facilitates gene expression. An interesting HDI is phenylbutyrate (PB), which has shown some clinical activity for the therapy of leukemia. In this report we have investigated the antineoplastic activity of 5-AZA-CdR and PB alone and in combination on murine L1210 lymphoid leukemic cells. The in vitro treatment of 5-AZA-CdR and PB in combination produced a greater inhibition of growth, DNA synthesis, and also a greater reduction on colony formation on both L1210 and human HL-60 leukemic cells as compared to either drug alone. The combination also produced a synergistic activation of the TSG, p15CDN2B, in the L1210 cells. In mice with L1210 leukemia the combination showed enhanced antineoplastic activity. We also observed an enhancement of the antineoplastic activity of this combination in mice with L1210 leukemia. These data provide a rationale to investigate 5-AZA-CdR and PB in patients with advanced leukemia.
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Affiliation(s)
- Maryse Lemaire
- Départment de pharmacologie, Université de Montréal, Centre de recherche pédiatrique, Hôpital Sainte-Justine, 3175 Côte Sainte-Catherine, Montréal, Québec H3T 1C5, Canada
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Deleu S, Lemaire M, Arts J, Menu E, Van Valckenborgh E, King P, Vande Broek I, De Raeve H, Van Camp B, Croucher P, Vanderkerken K. The effects of JNJ-26481585, a novel hydroxamate-based histone deacetylase inhibitor, on the development of multiple myeloma in the 5T2MM and 5T33MM murine models. Leukemia 2009; 23:1894-903. [DOI: 10.1038/leu.2009.121] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Niderkorn V, Morgavi D, Aboab B, Lemaire M, Boudra H. Cell wall component and mycotoxin moieties involved in the binding of fumonisin B1and B2by lactic acid bacteria. J Appl Microbiol 2009; 106:977-85. [DOI: 10.1111/j.1365-2672.2008.04065.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lemaire M, Chabot GG, Raynal NJ, Momparler LF, Hurtubise A, Bernstein ML, Momparler RL. Importance of dose-schedule of 5-aza-2'-deoxycytidine for epigenetic therapy of cancer. BMC Cancer 2008; 8:128. [PMID: 18454857 PMCID: PMC2386792 DOI: 10.1186/1471-2407-8-128] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [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: 11/01/2007] [Accepted: 05/02/2008] [Indexed: 12/31/2022] Open
Abstract
Background The inactivation of tumor suppressor genes (TSGs) by aberrant DNA methylation plays an important role in the development of malignancy. Since this epigenetic change is reversible, it is a potential target for chemotherapeutic intervention using an inhibitor of DNA methylation, such as 5-aza-2'-deoxycytidine (DAC). Although clinical studies show that DAC has activity against hematological malignancies, the optimal dose-schedule of this epigenetic agent still needs to be established. Methods Clonogenic assays were performed on leukemic and tumor cell lines to evaluate the in vitro antineoplastic activity of DAC. The reactivation of TSGs and inhibition of DNA methylation by DAC were investigated by reverse transcriptase-PCR and Line-1 assays. The in vivo antineoplastic activity of DAC administered as an i.v. infusion was evaluated in mice with murine L1210 leukemia by measurement of survival time, and in mice bearing murine EMT6 mammary tumor by excision of tumor after chemotherapy for an in vitro clonogenic assay. Results Increasing the DAC concentration and duration of exposure produced a greater loss of clonogenicity for both human leukemic and tumor cell lines. The reactivation of the TSGs (p57KIP2 in HL-60 leukemic cells and p16CDKN2A in Calu-6 lung carcinoma cells) and the inhibition of global DNA methylation in HL-60 leukemic cells increased with DAC concentration. In mice with L1210 leukemia and in mice bearing EMT6 tumors, the antineoplastic action of DAC also increased with the dose. The plasma level of DAC that produced a very potent antineoplastic effect in mice with leukemia or solid tumors was > 200 ng/ml (> 1 μM). Conclusion We have shown that intensification of the DAC dose markedly increased its antineoplastic activity in mouse models of cancer. Our data also show that there is a good correlation between the concentrations of DAC that reduce in vitro clonogenicity, reactivate TSGs and inhibit DNA methylation. These results suggest that the antineoplastic action of DAC is related to its epigenetic action. Our observations provide a strong rationale to perform clinical trials using dose intensification of DAC to maximize the chemotherapeutic potential of this epigenetic agent in patients with cancer.
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Affiliation(s)
- Maryse Lemaire
- Département de pharmacologie, Université de Montréal, Centre de recherche pédiatrique, Service d'Hématologie-Oncologie, Hôpital Sainte-Justine, 3175 Côte Sainte-Catherine, Montréal, Québec H3T 1C5, Canada.
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Alame M, Jahjah M, Berthod M, Lemaire M, Meille V, de Bellefon C. New 5,5′-disubstituted BINAP derivatives: Syntheses and pressure and electronic effects in Rh asymmetric hydrogenation. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2006.12.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Favre-Réguillon A, Fiaty K, Laurent P, Poriel L, Pellet-Rostaing S, Lemaire M. Solid/Liquid Extraction of Zirconium and Hafnium in Hydrochloric Acid Aqueous Solution with Anion Exchange ResinKinetic Study and Equilibrium Analyses. Ind Eng Chem Res 2007. [DOI: 10.1021/ie060444p] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Favre-Réguillon
- Laboratoire de Chimie Organique, UMR CNRS 7084, Conservatoire National des Arts et métiers, 2 rue Conté, 75003 Paris, France
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Bouquet M, Guy A, Lemaire M, Guetté JP. Preparation of Alkylarylcarbinols by Mono-Oxydation at the Benzylic Position Using 2,3-Dichloro-5,6-Dicyanobenzoquinone (D.D.Q.). SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397918508077258] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Poriel L, Pellet‐Rostaing S, Lamotte V, Lemaire M, Favre‐Réguillon A. Zirconium and Hafnium Separation, Part 2. Solid/Liquid Extraction in Hydrochloric Acid Aqueous Solution with Anion Exchange Resins. SEP SCI TECHNOL 2006. [DOI: 10.1080/01496390600725711] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Poriel L, Chitry F, Pellet‐Rostaing S, Lemaire M, Favre‐Réguillon A. Zirconium and Hafnium Separation, Part 3. Ligand‐Enhanced Separation of Zirconium and Hafnium from Aqueous Solution using Nanofiltration. SEP SCI TECHNOL 2006. [DOI: 10.1080/01496390600725810] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sorin A, Favre-Réguillon A, Pellet-Rostaing S, Bernier G, Lemaire M. Polyaminocarboxylic acids rejection by charged nanofiltration membrane. J Memb Sci 2006. [DOI: 10.1016/j.memsci.2005.12.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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48
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Poriel L, Favre‐Réguillon A, Pellet‐Rostaing S, Lemaire M. Zirconium and Hafnium Separation, Part 1. Liquid/Liquid Extraction in Hydrochloric Acid Aqueous Solution with Aliquat 336. SEP SCI TECHNOL 2006. [DOI: 10.1080/01496390600725802] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lemaire M, Momparler LF, Bernstein ML, Marquez VE, Momparler RL. Enhancement of antineoplastic action of 5-aza-2???-deoxycytidine by zebularine on L1210 leukemia. Anticancer Drugs 2005; 16:301-8. [PMID: 15711182 DOI: 10.1097/00001813-200503000-00009] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Tumor suppressor genes that have been silenced by aberrant DNA methylation are potential targets for reactivation by novel chemotherapeutic agents. The potent inhibitor of DNA methylation and antileukemic agent, 5-aza-2'-deoxycytidine (5-AZA-CdR, Decitabine), can reactivate silent tumor suppressor genes. One hindrance to the curative potential of 5-AZA-CdR is its rapid in vivo inactivation by cytidine deaminase (CD). An approach to overcome this obstacle is to use 5-AZA-CdR in combination with zebularine (Zeb), a potent inhibitor of CD. Zeb also possesses independent antineoplastic activity due to its inhibition of DNA methylation. We tested the capacity of 5-AZA-CdR and Zeb alone and in combination to inhibit growth and colony formation of different leukemic cell lines. 5-AZA-CdR and Zeb in combination produced a greater inhibition of growth against murine L1210 lymphoid leukemic cells, and a greater reduction in colony formation by L1210 and human HL-60 myeloid leukemic cells, than either agent alone. The ability of these agents to reactivate the tumor suppressor gene, p57KIP2, was also tested using RT-PCR. The combination produced a synergistic reactivation of p57KIP2 in HL-60 leukemic cells. A methylation-specific PCR assay showed that this combination also induced a significantly greater demethylation level of the p57KIP2 promoter than either drug alone. The in vivo antineoplastic activity of the agents was evaluated in mice with L1210 leukemia. A greater increase in survival time of mice with L1210 leukemia was observed with the combination than with either agent alone using three different dose schedules. The enhanced activity observed with 5-AZA-CdR plus Zeb in both murine and human leukemic cells lines provides a rationale for the clinical investigation of these drugs in patients with advanced leukemia. The probable mechanism of this drug interaction involves inhibition of CD by Zeb and the complementary inhibition of DNA methylation by both agents.
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Affiliation(s)
- Maryse Lemaire
- Département de Pharmacologie, Université de Montréal, Montréal, Canada
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Abstract
A patient presented with cholera and a severe degree of ECF volume contraction. Despite large losses of bicarbonate (HCO3-)-containing diarrhoeal fluid, laboratory acid-base values were remarkably close to normal. A detailed analysis emphasizing principles of physiology and a quantitative approach provided new insights and eventually better definitions of metabolic and respiratory acidosis. A shift in focus from HCO3- concentration to HCO3- content in the extracellular fluid (ECF) compartment revealed the presence of metabolic acidosis. Central to this analysis was an emphasis on the haematocrit to enable a more accurate estimate of the degree of ECF volume contraction. The latter also revealed 'contraction' metabolic alkalosis, which masked the underlying metabolic acidosis. The presence of a respiratory acidosis of the tissue type was evident from the raised venous PCO2, which was not surprising once the magnitude of the ECF contraction had been appreciated. 'Bad buffering', as defined by Professor McCance, was the immediate danger and prompted swift action to restore an effective circulation. The haematocrit and the venous PCO2 also contribute valuable information to monitor the response to therapy. Nevertheless, there were still dangers to be discovered when an in-depth analysis suggested that the administration of isotonic saline would introduce an unanticipated danger for the patient.
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Affiliation(s)
- N Zalunardo
- Division of Nephrology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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