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Naithani S, Goswami N, Singh S, Yadav V, Kumar S, Kumar P, Kumar A, Goswami T, Kumar S. Turn-on detection of Al 3+ and Zn 2+ ions by a NSN donor probe: reversibility, logic gates and DFT calculations. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:6021-6030. [PMID: 37909225 DOI: 10.1039/d3ay01534c] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
An efficient dual functional naphthalene-derived Schiff base NpSb probe has been synthesised and evaluated for its fluorescence and chromogenic response towards metal ions. The NpSb probe was capable of selectively recognising Al3+ and Zn2+ ions when they were excited at the same wavelength in an aqueous organic solvent system. Almost non-fluorescent NpSb displayed a 'turn-on' fluorescence response when treated with Zn2+ (λem = 416 nm) and Al3+ (λem = 469 nm) ions due to the chelation-enhanced fluorescence (CHEF) effect. The limit of detection (LoD) values for Al3+ and Zn2+ have been determined to be 38.0 nM and 43.0 nM, respectively. The binding constants for Al3+ and Zn2+ were found to be 1.18 × 106 M-1 and 3.5 × 105 M-1, respectively. The NpSb also acted as a colorimetric sensor for Al3+ as the colour of the probe's solution turned to pale green from colourless upon Al3+ addition. The binding mechanism between NpSb and Zn2+/Al3+ was supported by the ESI-MS, Job's plot, NMR, and DFT studies. The reversibility experiments were carried out with an F- ion and EDTA with the development of corresponding logic gates. Moreover, NpSb could be applied to detect Al3+ ions in real samples such as tap water, distilled water and soil samples.
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Affiliation(s)
- Sudhanshu Naithani
- Department of Chemistry, Applied Science Cluster, University of Petroleum and Energy Studies (UPES), Dehradun 248007, Uttarakhand, India.
| | - Nidhi Goswami
- Department of Chemistry, Applied Science Cluster, University of Petroleum and Energy Studies (UPES), Dehradun 248007, Uttarakhand, India.
| | - Sain Singh
- Department of Chemistry, Indian Institute of Technology, Roorkee 247667, Uttarakhand, India
| | - Vikas Yadav
- Nanoscopic Imaging and Sensing Lab, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sanjay Kumar
- Department of Chemistry, Muzaffarpur Institute of Technology, Muzaffarpur 842003, India
- Department of Pharmacy, Muzaffarpur Institute of Technology, Muzaffarpur 842003, India
| | - Pramod Kumar
- Department of Chemistry, Mahamana Malviya College Khekra (Baghpat), CCS University Meerut, India
| | - Amit Kumar
- Department of Chemistry, Applied Science Cluster, University of Petroleum and Energy Studies (UPES), Dehradun 248007, Uttarakhand, India.
| | - Tapas Goswami
- Department of Chemistry, Applied Science Cluster, University of Petroleum and Energy Studies (UPES), Dehradun 248007, Uttarakhand, India.
| | - Sushil Kumar
- Department of Chemistry, Applied Science Cluster, University of Petroleum and Energy Studies (UPES), Dehradun 248007, Uttarakhand, India.
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Zhang X, Hou Y, Huang Y, Chen W, Zhang H. Interplay between zinc and cell proliferation and implications for the growth of livestock. J Anim Physiol Anim Nutr (Berl) 2023; 107:1402-1418. [PMID: 37391879 DOI: 10.1111/jpn.13851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 07/02/2023]
Abstract
Zinc (Zn) plays a critical role in the growth of livestock, which depends on cell proliferation. In addition to modifying the growth associated with its effects on food intake, mitogenic hormones, signal transduction and gene transcription, Zn also regulates body weight gain through mediating cell proliferation. Zn deficiency in animals leads to growth inhibition, along with an arrest of cell cycle progression at G0/G1 and S phase due to depression in the expression of cyclin D/E and DNA synthesis. Therefore, in the present study, the interplay between Zn and cell proliferation and implications for the growth of livestock were reviewed, in which Zn regulates cell proliferation in several ways, especially cell cycle progression at the G0/G1 phase DNA synthesis and mitosis. During the cell cycle, the Zn transporters and major Zn binding proteins such as metallothioneins are altered with the requirements of cellular Zn level and nuclear translocation of Zn. In addition, calcium signaling, MAPK pathway and PI3K/Akt cascades are also involved in the process of Zn-interfering cell proliferation. The evidence collected over the last decade highlights the necessity of Zn for normal cell proliferation, which suggests Zn supplementation should be considered for the growth and health of poultry.
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Affiliation(s)
- Xiangli Zhang
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, China
| | - Yuhuang Hou
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Ghent, Belgium
| | - Yanqun Huang
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, China
| | - Wen Chen
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, China
| | - Huaiyong Zhang
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, China
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Ghent University, Ghent, Belgium
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3
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Chen A, Gao G, Lian G, Gong J, Luo L, Liu J, Chen W, Xu C, Wang H, Xie L. Zinc promotes cell proliferation via regulating metal-regulatory transcription factor 1 expression and transcriptional activity in pulmonary arterial hypertension. Cell Cycle 2023; 22:1284-1301. [PMID: 37128643 PMCID: PMC10193901 DOI: 10.1080/15384101.2023.2205209] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/30/2022] [Accepted: 04/17/2023] [Indexed: 05/03/2023] Open
Abstract
Metal responsive transcription factor 1 (MTF-1) is a zinc-dependent transcription factor involved in the development of pulmonary arterial hypertension (PAH), which is a life-threatening disease characterized by elevated pulmonary artery pressure and pulmonary vascular remodeling. However, little is known about the role and regulatory signaling of MTF-1 in PAH. This study aimed to investigate the effect and mechanism of MTF-1 on the proliferation of pulmonary arterial smooth muscle cells (PASMCs). Several techniques including intracellular-free zinc detected by fluorescent indicator-fluozinc-3-AM, western blot, luciferase reporter, and cell proliferation assay were conducted to perform a comprehensive analysis of MTF-1 in proliferation of PASMCs in PAH. Increased cytosolic zinc was shown in monocrotaline (MCT)-PASMCs and ZnSO₄-treated PASMCs, which led to overexpression and overactivation of MTF-1, followed by the up-regulation of placental growth factor (PlGF). Elevated MTF-1 and PlGF were observed in western blot, and high transcriptional activity of MTF-1 was confirmed by luciferase reporter in ZnSO4-treated cells. Further investigation of cell proliferation revealed a favorable impact of zinc ions on PASMCs proliferation, with the deletion of Mtf-1/Plgf attenuating ZnSO4-induced proliferation. Flow cytometry analysis showed that blockade of PKC signaling inhibited the cell cycle of MCT-PASMCs and ZnSO4-treated PASMCs. The Zinc/PKC/MTF-1/PlGF pathway is involved in the up-regulatory effect on the PASMCs proliferation in the process of PAH. This study provided novel insight into zinc homeostasis in the pathogenesis of PAHs, and the regulation of MTF-1 might be a potential target for therapeutic intervention in PAH.
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Affiliation(s)
- Ai Chen
- Department of Geriatrics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Clinical Research Center for Geriatric Hypertension Disease of Fujian province, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Branch of National Clinical Research Center for Aging and Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
- Department of Geriatrics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, People’s Republic of China
| | - Gufeng Gao
- Department of Geriatrics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Clinical Research Center for Geriatric Hypertension Disease of Fujian province, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Branch of National Clinical Research Center for Aging and Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
- Department of Geriatrics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, People’s Republic of China
| | - Guili Lian
- Department of Geriatrics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Clinical Research Center for Geriatric Hypertension Disease of Fujian province, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Branch of National Clinical Research Center for Aging and Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
- Department of Geriatrics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, People’s Republic of China
| | - Jin Gong
- Department of Geriatrics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Clinical Research Center for Geriatric Hypertension Disease of Fujian province, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Branch of National Clinical Research Center for Aging and Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
- Department of Geriatrics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, People’s Republic of China
| | - Li Luo
- Department of Geriatrics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Clinical Research Center for Geriatric Hypertension Disease of Fujian province, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Branch of National Clinical Research Center for Aging and Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
- Department of Geriatrics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, People’s Republic of China
| | - Junping Liu
- Department of Geriatrics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Clinical Research Center for Geriatric Hypertension Disease of Fujian province, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Branch of National Clinical Research Center for Aging and Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
- Department of Geriatrics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, People’s Republic of China
| | - Weixiao Chen
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
| | - Changsheng Xu
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
| | - Huajun Wang
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
| | - Liangdi Xie
- Department of Geriatrics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Fujian Hypertension Research Institute, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Clinical Research Center for Geriatric Hypertension Disease of Fujian province, The First Affiliated Hospital of Fujian Medical University, Fuzhou, People’s Republic of China
- Branch of National Clinical Research Center for Aging and Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
- Department of Geriatrics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, People’s Republic of China
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Jia R, Song Z, Lin J, Li Z, Shan G, Huang C. Gawky modulates MTF-1-mediated transcription activation and metal discrimination. Nucleic Acids Res 2021; 49:6296-6314. [PMID: 34107019 PMCID: PMC8216474 DOI: 10.1093/nar/gkab474] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/12/2021] [Accepted: 05/17/2021] [Indexed: 02/07/2023] Open
Abstract
Metal-induced genes are usually transcribed at relatively low levels under normal conditions and are rapidly activated by heavy metal stress. Many of these genes respond preferentially to specific metal-stressed conditions. However, the mechanism by which the general transcription machinery discriminates metal stress from normal conditions and the regulation of MTF-1-meditated metal discrimination are poorly characterized. Using a focused RNAi screening in Drosophila Schneider 2 (S2) cells, we identified a novel activator, the Drosophila gawky, of metal-responsive genes. Depletion of gawky has almost no effect on the basal transcription of the metallothionein (MT) genes, but impairs the metal-induced transcription by inducing the dissociation of MTF-1 from the MT promoters and the deficient nuclear import of MTF-1 under metal-stressed conditions. This suggests that gawky serves as a 'checkpoint' for metal stress and metal-induced transcription. In fact, regular mRNAs are converted into gawky-controlled transcripts if expressed under the control of a metal-responsive promoter, suggesting that whether transcription undergoes gawky-mediated regulation is encrypted therein. Additionally, lack of gawky eliminates the DNA binding bias of MTF-1 and the transcription preference of metal-specific genes. This suggests a combinatorial control of metal discrimination by gawky, MTF-1, and MTF-1 binding sites.
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Affiliation(s)
- Ruirui Jia
- School of Life Sciences, Chongqing University, Chongqing 401331, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 401331, China
| | - Zhenxing Song
- School of Life Sciences, Chongqing University, Chongqing 401331, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 401331, China
| | - Jiamei Lin
- School of Life Sciences, Chongqing University, Chongqing 401331, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 401331, China
| | - Zhengguo Li
- School of Life Sciences, Chongqing University, Chongqing 401331, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 401331, China
| | - Ge Shan
- School of Basic Medical Sciences, Division of Life Science and Medicine, University of Science and Technology of China, Hefei 230027, China
| | - Chuan Huang
- School of Life Sciences, Chongqing University, Chongqing 401331, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 401331, China
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5
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Osmanbeyoglu HU, Shimizu F, Rynne-Vidal A, Alonso-Curbelo D, Chen HA, Wen HY, Yeung TL, Jelinic P, Razavi P, Lowe SW, Mok SC, Chiosis G, Levine DA, Leslie CS. Chromatin-informed inference of transcriptional programs in gynecologic and basal breast cancers. Nat Commun 2019; 10:4369. [PMID: 31554806 PMCID: PMC6761109 DOI: 10.1038/s41467-019-12291-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 09/02/2019] [Indexed: 02/08/2023] Open
Abstract
Chromatin accessibility data can elucidate the developmental origin of cancer cells and reveal the enhancer landscape of key oncogenic transcriptional regulators. We develop a computational strategy called PSIONIC (patient-specific inference of networks informed by chromatin) to combine chromatin accessibility data with large tumor expression data and model the effect of enhancers on transcriptional programs in multiple cancers. We generate a new ATAC-seq data profiling chromatin accessibility in gynecologic and basal breast cancer cell lines and apply PSIONIC to 723 patient and 96 cell line RNA-seq profiles from ovarian, uterine, and basal breast cancers. Our computational framework enables us to share information across tumors to learn patient-specific TF activities, revealing regulatory differences between and within tumor types. PSIONIC-predicted activity for MTF1 in cell line models correlates with sensitivity to MTF1 inhibition, showing the potential of our approach for personalized therapy. Many identified TFs are significantly associated with survival outcome. To validate PSIONIC-derived prognostic TFs, we perform immunohistochemical analyses in 31 uterine serous tumors for ETV6 and 45 basal breast tumors for MITF and confirm that the corresponding protein expression patterns are also significantly associated with prognosis.
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Affiliation(s)
- Hatice U Osmanbeyoglu
- Department of Biomedical Informatics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
- Computational & Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
| | - Fumiko Shimizu
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Angela Rynne-Vidal
- Department of Gynecologic Oncology and Reproductive Medicine-Research, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Direna Alonso-Curbelo
- Department of Cancer Biology and Genetics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Hsuan-An Chen
- Department of Cancer Biology and Genetics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Hannah Y Wen
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Tsz-Lun Yeung
- Department of Gynecologic Oncology and Reproductive Medicine-Research, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Petar Jelinic
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Medical Center, New York, NY, USA
| | - Pedram Razavi
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Scott W Lowe
- Department of Cancer Biology and Genetics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Samuel C Mok
- Department of Gynecologic Oncology and Reproductive Medicine-Research, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Gabriela Chiosis
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Douglas A Levine
- Laura and Isaac Perlmutter Cancer Center, New York University Langone Medical Center, New York, NY, USA
| | - Christina S Leslie
- Computational & Systems Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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6
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Ji L, Zhao G, Zhang P, Huo W, Dong P, Watari H, Jia L, Pfeffer LM, Yue J, Zheng J. Knockout of MTF1 Inhibits the Epithelial to Mesenchymal Transition in Ovarian Cancer Cells. J Cancer 2018; 9:4578-4585. [PMID: 30588241 PMCID: PMC6299381 DOI: 10.7150/jca.28040] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 08/08/2018] [Indexed: 12/17/2022] Open
Abstract
Due to peritoneal metastasis and frequent recurrence, ovarian cancer has the highest mortality among gynecological cancers. Epithelial to mesenchymal transition (EMT) contributes to ovarian tumor metastasis. In this study, we report for the first time that metal regulatory transcription factor 1 (MTF1) was upregulated in ovarian cancer, and its high expression was associated with poor patient survival and disease relapse. Knockout of MTF1 using lentiviral CRISPR/Cas9 nickase vector-mediated gene editing inhibited EMT by upregulating epithelial cell markers E-cadherin and cytokeratin 7, and downregulating mesenchymal markers Snai2 and β-catenin in ovarian cancer SKOV3 and OVCAR3 cells. Loss of MTF1 reduced cell proliferation, migration, and invasion in both SKOV3 and OVCAR3 cells. Knockout of MTF1 upregulated the expression of the KLF4 transcription factor, and attenuated two cellular survival pathways, ERK1/2 and AKT. Our studies demonstrated that MTF1 plays an oncogenic role and contributes to ovarian tumor metastasis by promoting EMT. MTF1 may be a novel biomarker for early diagnosis as well as a drug target for clinical therapy.
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Affiliation(s)
- Liang Ji
- Department of Anatomy, College of Basic Medical Science, Harbin Medical University, Harbin, China
| | - Guannan Zhao
- Department of Pathology and Laboratory Medicine, the University of Tennessee Health Science Center, Memphis, TN, 38163, USA.,Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Peng Zhang
- Department of Pathology and Laboratory Medicine, the University of Tennessee Health Science Center, Memphis, TN, 38163, USA.,Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Wenying Huo
- Department of Pathology and Laboratory Medicine, the University of Tennessee Health Science Center, Memphis, TN, 38163, USA.,Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Peixin Dong
- Department of Obstetrics and Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hidemichi Watari
- Department of Obstetrics and Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Limin Jia
- Department of Anatomy, College of Basic Medical Science, Harbin Medical University, Harbin, China
| | - Lawrence M Pfeffer
- Department of Pathology and Laboratory Medicine, the University of Tennessee Health Science Center, Memphis, TN, 38163, USA.,Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Junming Yue
- Department of Pathology and Laboratory Medicine, the University of Tennessee Health Science Center, Memphis, TN, 38163, USA.,Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Jinhua Zheng
- Department of Anatomy, College of Basic Medical Science, Harbin Medical University, Harbin, China
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7
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Dietrich N, Schneider DL, Kornfeld K. A pathway for low zinc homeostasis that is conserved in animals and acts in parallel to the pathway for high zinc homeostasis. Nucleic Acids Res 2017; 45:11658-11672. [PMID: 28977437 PMCID: PMC5714235 DOI: 10.1093/nar/gkx762] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 08/22/2017] [Indexed: 12/20/2022] Open
Abstract
The essential element zinc plays critical roles in biology. High zinc homeostasis mechanisms are beginning to be defined in animals, but low zinc homeostasis is poorly characterized. We investigated low zinc homeostasis in Caenorhabditis elegans because the genome encodes 14 evolutionarily conserved Zrt, Irt-like protein (ZIP) zinc transporter family members. Three C. elegans zipt genes were regulated in zinc-deficient conditions; these promoters contained an evolutionarily conserved motif that we named the low zinc activation (LZA) element that was both necessary and sufficient for activation of transcription in response to zinc deficiency. These results demonstrated that the LZA element is a critical part of the low zinc homeostasis pathway. Transcriptional regulation of the LZA element required the transcription factor ELT-2 and mediator complex member MDT-15. We investigated conservation in mammals by analyzing LZA element function in human cultured cells; the LZA element-mediated transcriptional activation in response to zinc deficiency in cells, suggesting a conserved pathway of low zinc homeostasis. We propose that the pathway for low zinc homeostasis, which includes the LZA element and ZIP transporters, acts in parallel to the pathway for high zinc homeostasis, which includes the HZA element, HIZR-1 transcription factor and cation diffusion facilitator transporters.
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Affiliation(s)
- Nicholas Dietrich
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Daniel L Schneider
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Kerry Kornfeld
- Department of Developmental Biology, Washington University School of Medicine, Saint Louis, MO 63110, USA
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8
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Günther V, Lindert U, Schaffner W. The taste of heavy metals: gene regulation by MTF-1. BIOCHIMICA ET BIOPHYSICA ACTA 2012; 1823:1416-25. [PMID: 22289350 DOI: 10.1016/j.bbamcr.2012.01.005] [Citation(s) in RCA: 234] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 01/08/2012] [Accepted: 01/11/2012] [Indexed: 11/22/2022]
Abstract
The metal-responsive transcription factor-1 (MTF-1, also termed MRE-binding transcription factor-1 or metal regulatory transcription factor-1) is a pluripotent transcriptional regulator involved in cellular adaptation to various stress conditions, primarily exposure to heavy metals but also to hypoxia or oxidative stress. MTF-1 is evolutionarily conserved from insects to humans and is the main activator of metallothionein genes, which encode small cysteine-rich proteins that can scavenge toxic heavy metals and free radicals. MTF-1 has been suggested to act as an intracellular metal sensor but evidence for direct metal sensing was scarce. Here we review recent advances in our understanding of MTF-1 regulation with a focus on the mechanism underlying heavy metal responsiveness and transcriptional activation mediated by mammalian or Drosophila MTF-1. This article is part of a Special Issue entitled: Cell Biology of Metals.
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Affiliation(s)
- Viola Günther
- Institute of Molecular Life Sciences, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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9
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Nzengue Y, Candéias SM, Sauvaigo S, Douki T, Favier A, Rachidi W, Guiraud P. The toxicity redox mechanisms of cadmium alone or together with copper and zinc homeostasis alteration: its redox biomarkers. J Trace Elem Med Biol 2011; 25:171-80. [PMID: 21820296 DOI: 10.1016/j.jtemb.2011.06.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2010] [Revised: 05/01/2011] [Accepted: 06/29/2011] [Indexed: 12/27/2022]
Abstract
Cadmium (Cd) is a toxic metal and can induce and/or promote diseases in humans (cancer, aging diseases, kidney and bone diseases, etc.). Its toxicity involves many mechanisms including the alteration of copper (Cu) and zinc (Zn) homeostasis leading to reactive oxygen species (ROS) production, either directly or through the inhibition of antioxidant activities. Importantly, ROS can induce oxidative damages in cells. Cadmium, Cu and Zn are also able to induce glutathione (GSH) and metallothioneins (MT) synthesis in a cell-type-dependent manner. As a consequence, the effects induced by these three metals result simultaneously from the inhibition of antioxidant activities and the induction of other factors such as GSH and MT synthesis. MT levels are regulated not only by the p53 protein in a cell-type-dependent manner, or by transcription factors such as metal-responsive transcription factor 1 (MTF-1) and cellular Zn levels but also by cellular GSH level. As described in the literature, DNA damage, GSH and MT levels are sensitive biomarkers used to identify Cd-induced toxicity alone or together with Cu and Zn homeostasis alteration.
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Affiliation(s)
- Yves Nzengue
- INAC/SCIB UMR-E3 CEA/UJF, Laboratoire Lésions des Acides Nucléiques, CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble cedex 9, France.
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10
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Liuzzi JP, Guo L, Chang SM, Cousins RJ. Krüppel-like factor 4 regulates adaptive expression of the zinc transporter Zip4 in mouse small intestine. Am J Physiol Gastrointest Liver Physiol 2009; 296:G517-23. [PMID: 19147802 PMCID: PMC2660179 DOI: 10.1152/ajpgi.90568.2008] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Epithelial cells of the small intestine are the site of zinc absorption. Intestinal uptake of zinc is inversely proportional to the dietary supply of this essential micronutrient. The mechanism responsible for this adaptive differential in apical zinc transport is not known. The zinc transporter Zip4 (Slc39a4) is essential for adequate enteric zinc uptake. In mice, Zip4 expression is upregulated at low zinc intakes with a concomitant ZIP4 localization to the apical enterocyte plasma membrane. With the present experiments, we show that the zinc finger transcription factor Krüppel-like factor 4 (KLF4), produced in high abundance in the intestine, is expressed at elevated levels in mice fed a low-zinc diet. In the murine intestinal epithelial cell (IEC) line MODE-K, zinc depletion of culture medium with cell-permeant and cell-impermeant chelators increased Zip4 and Klf4 mRNA and Zip4 heterogeneous nuclear RNA expression. Zinc depletion led to increased KLF4 in nuclear extracts. Knockdown of KLF4 using small interfering RNA transfection drastically limited ZIP4 induction upon zinc depletion and reduced 65Zn uptake by depleted IECs. EMSAs with nuclear extracts of IECs showed KLF4 binding to cis elements of the mouse Zip4 promoter, with increased binding under zinc-limited conditions. Reporter constructs with the Zip4 promoter and mutation studies further demonstrated that Zip4 is regulated through a KLF4 response element. These data from experiments with mice and murine IECs demonstrate that KLF4 is induced during zinc restriction and is a transcription factor involved in adaptive regulation of the zinc transporter ZIP4.
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Affiliation(s)
- Juan P. Liuzzi
- Center for Nutritional Sciences and Food Science and Human Nutrition Department, University of Florida, Gainesville, Florida
| | - Liang Guo
- Center for Nutritional Sciences and Food Science and Human Nutrition Department, University of Florida, Gainesville, Florida
| | - Shou-Mei Chang
- Center for Nutritional Sciences and Food Science and Human Nutrition Department, University of Florida, Gainesville, Florida
| | - Robert J. Cousins
- Center for Nutritional Sciences and Food Science and Human Nutrition Department, University of Florida, Gainesville, Florida
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11
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Thierse HJ, Helm S, Pink M, Weltzien HU. Novel fluorescence assay for tracking molecular and cellular allergen-protein interactions. J Immunol Methods 2007; 328:14-20. [PMID: 17880993 DOI: 10.1016/j.jim.2007.07.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Revised: 07/20/2007] [Accepted: 07/20/2007] [Indexed: 11/20/2022]
Abstract
T cells recognizing nickel (Ni) are key mediators in human Ni allergy, which represents the most common form of human contact hypersensitivity. In contrast to well-characterized Ni-specific human T cell clones, molecular knowledge about the extra- and intracellular route(s) of antigen/allergen presentation and processing of Ni-specific epitopes is still fragmentary. Here, we demonstrate a new metal-specific fluorescent technique to detect and quantify metal ions, like Ni(2+), while they are associated with isolated metalloproteins. Moreover, utilizing the fluorescent metal sensor molecule Newport Green (NPG) a novel method has been developed, which permits the metal-specific detection of Ni(2+) binding to surface or intracellular structures of individual human antigen presenting cells by flow cytometry. We expect such metal-specific fluorescent analyses to contribute to a better basic understanding of molecular and cellular immune processes involved in Ni-specific T cell epitope generation and the pathogenesis of human nickel allergy.
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Affiliation(s)
- Hermann-Josef Thierse
- Research Group Immunology and Proteomics, Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim, Germany.
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12
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Knipp M, Karotki AV, Chesnov S, Natile G, Sadler PJ, Brabec V, Vasák M. Reaction of Zn7metallothionein with cis- and trans-[Pt(N-donor)2Cl2] anticancer complexes: trans-Pt(II) complexes retain their N-donor ligands. J Med Chem 2007; 50:4075-86. [PMID: 17665893 DOI: 10.1021/jm070271l] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Intrinsic and acquired resistance are major drawbacks of platinum-based cancer therapy. The protein superfamily of cysteine- and ZnII-rich proteins, metallothioneins (MT), efficiently inactivate these antitumor drugs because of the strong reactivity of platinum compounds with S-donor molecules. In this study the reactions of human Zn7MT-2 with twelve cis/trans-[Pt(N-donor)2Cl2] compounds and [Pt(dien)Cl]Cl, including new generation drugs, were investigated and the products characterized. A comparison of reaction kinetics revealed that trans-PtII compounds react faster with Zn7MT-2 than cis-PtII compounds. The characterization of the products showed that while all ligands in cis-PtII compounds were replaced by cysteine thiolates, trans-PtII compounds retained their N-donor ligands, thus remaining in a potentially active form. These results provide an increased understanding of the role of MT in the acquired resistance to platinum-based anticancer drugs.
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Affiliation(s)
- Markus Knipp
- Department of Biochemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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13
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Laity JH, Andrews GK. Understanding the mechanisms of zinc-sensing by metal-response element binding transcription factor-1 (MTF-1). Arch Biochem Biophys 2007; 463:201-10. [PMID: 17462582 DOI: 10.1016/j.abb.2007.03.019] [Citation(s) in RCA: 165] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2007] [Revised: 03/16/2007] [Accepted: 03/16/2007] [Indexed: 11/17/2022]
Abstract
The regulation of divalent zinc has been observed in a wide range of organisms. Since this metal is an essential nutrient, but also toxic in excess, zinc homeostasis is crucial for normal cellular functioning. The metal-responsive-element-binding transcription factor-1 (MTF-1) is a key regulator of zinc in higher eukaryotes ranging from insects to mammals. MTF-1 controls the expression of metallothioneins (MTs) and a number of other genes directly involved in the intracellular sequestration and transport of zinc. Although the diverse functions of MTF-1 extend well beyond zinc homeostasis to include stress-responses to heavy metal toxicity, oxidative stress, and selected chemical agents, in this review we focus on the recent advances in understanding the mechanisms whereby MTF-1 regulates MT gene expression to protect the cell from fluctuations in environmental zinc. Particular emphasis is devoted to recent studies involving the Cys2His2 zinc finger DNA-binding domain of MTF-1, which is an important contributor to the zinc-sensing and metal-dependent transcriptional activation functions of this protein.
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Affiliation(s)
- John H Laity
- Division of Cell Biology and Biophysics, School of Biological Sciences, University of Missouri-Kansas City, Kansas City, MO 64110-2499, USA.
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14
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Gilmour PS, Schladweiler MC, Nyska A, McGee JK, Thomas R, Jaskot RH, Schmid J, Kodavanti UP. Systemic imbalance of essential metals and cardiac gene expression in rats following acute pulmonary zinc exposure. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2006; 69:2011-32. [PMID: 17074742 DOI: 10.1080/15287390600746173] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
It was recently demonstrated that particulate matter (PM) containing water-soluble zinc produces cardiac injury following pulmonary exposure. To investigate whether pulmonary zinc exposure produces systemic metal imbalance and direct cardiac effects, male Wistar Kyoto (WKY) rats (12-14 wk age) were intratracheally (IT) instilled with saline or 2 micromol/kg zinc sulfate. Temporal analysis was performed for systemic levels of essential metals (zinc, copper, and selenium), and induction of zinc transporter-2 (ZT-2) and metallothionein-1 (MT-1) mRNA in the lung, heart, and liver. Additionally, cardiac gene expression profile was evaluated using Affymetrix GeneChips (rat 230A) arrays to identify zinc-specific effects. Pulmonary zinc instillation produced an increase in plasma zinc to approximately 20% at 1 and 4 h postexposure with concomitant decline in the lung levels. At 24 and 48 h postexposure, zinc levels rose significantly (approximately 35%) in the liver. At these time points, plasma and liver levels of copper and selenium also increased significantly, suggesting systemic disturbance in essential metals. Zinc exposure was associated with marked induction of MT-1 and ZT-2 mRNA in lung, heart, and liver, suggesting systemic metal sequestration response. Given the functional role of zinc in hundreds of proteins, the gene expression profiles demonstrated changes that are expected based on its physiological role. Zinc exposure produced an increase in expression of kinases and inhibition of expression of phosphatases; up- or downregulation of genes involved in mitochondrial function; changes in calcium regulatory proteins suggestive of elevated intracellular free calcium and increases in sulfotransferases; upregulation of potassium channel genes; and changes in free radical-sensitive proteins. Some of these expression changes are reflective of a direct effect of zinc on myocardium following pulmonary exposure, which may result in impaired mitochondrial respiration, stimulated cell signaling, altered Ca2+ homeostasis, and increased transcription of sulfotransferases. Cardiotoxicity may be an outcome of acute zinc toxicosis and occupational exposures to metal fumes containing soluble zinc. Imbalance of systemic metal homeostasis as a result of pulmonary zinc exposure may underlie the cause of extrapulmonary effects.
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Affiliation(s)
- Peter S Gilmour
- Center for Environmental Medicine, Asthma and Lung Biology, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
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15
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Yepiskoposyan H, Egli D, Fergestad T, Selvaraj A, Treiber C, Multhaup G, Georgiev O, Schaffner W. Transcriptome response to heavy metal stress in Drosophila reveals a new zinc transporter that confers resistance to zinc. Nucleic Acids Res 2006; 34:4866-77. [PMID: 16973896 PMCID: PMC1635269 DOI: 10.1093/nar/gkl606] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Revised: 08/02/2006] [Accepted: 08/03/2006] [Indexed: 01/16/2023] Open
Abstract
All organisms are confronted with external variations in trace element abundance. To elucidate the mechanisms that maintain metal homeostasis and protect against heavy metal stress, we have determined the transcriptome responses in Drosophila to sublethal doses of cadmium, zinc, copper, as well as to copper depletion. Furthermore, we analyzed the transcriptome of a metal-responsive transcription factor (MTF-1) null mutant. The gene family encoding metallothioneins, and the ABC transporter CG10505 that encodes a homolog of 'yeast cadmium factor' were induced by all three metals. Zinc and cadmium responses have similar features: genes upregulated by both metals include those for glutathione S-transferases GstD2 and GstD5, and for zinc transporter-like proteins designated ZnT35C and ZnT63C. Several of the metal-induced genes that emerged in our study are regulated by the transcription factor MTF-1. mRNA studies in MTF-1 overexpressing or null mutant flies and in silico search for metal response elements (binding sites for MTF-1) confirmed novel MTF-1 regulated genes such as ferritins, the ABC transporter CG10505 and the zinc transporter ZnT35C. The latter was analyzed in most detail; biochemical and genetic approaches, including targeted mutation, indicate that ZnT35C is involved in cellular and organismal zinc efflux and plays a major role in zinc detoxification.
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Affiliation(s)
- Hasmik Yepiskoposyan
- Institute of Molecular Biology, University of ZurichCH-8057 Zurich, Switzerland
- Laboratory of Genetics, University of WisconsinWI 53706-1580, USA
- Freie Universität Berlin, Institut für Chemie und BiochemieD-14195 Berlin, Germany
| | - Dieter Egli
- Institute of Molecular Biology, University of ZurichCH-8057 Zurich, Switzerland
- Laboratory of Genetics, University of WisconsinWI 53706-1580, USA
- Freie Universität Berlin, Institut für Chemie und BiochemieD-14195 Berlin, Germany
| | - Tim Fergestad
- Laboratory of Genetics, University of WisconsinWI 53706-1580, USA
| | - Anand Selvaraj
- Institute of Molecular Biology, University of ZurichCH-8057 Zurich, Switzerland
- Laboratory of Genetics, University of WisconsinWI 53706-1580, USA
- Freie Universität Berlin, Institut für Chemie und BiochemieD-14195 Berlin, Germany
| | - Carina Treiber
- Freie Universität Berlin, Institut für Chemie und BiochemieD-14195 Berlin, Germany
| | - Gerd Multhaup
- Freie Universität Berlin, Institut für Chemie und BiochemieD-14195 Berlin, Germany
| | - Oleg Georgiev
- Institute of Molecular Biology, University of ZurichCH-8057 Zurich, Switzerland
- Laboratory of Genetics, University of WisconsinWI 53706-1580, USA
- Freie Universität Berlin, Institut für Chemie und BiochemieD-14195 Berlin, Germany
| | - Walter Schaffner
- To whom correspondence should be addressed: Tel:+41 44 635 3150; Fax:+41 44 635 6811;
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Li Y, Kimura T, Laity JH, Andrews GK. The zinc-sensing mechanism of mouse MTF-1 involves linker peptides between the zinc fingers. Mol Cell Biol 2006; 26:5580-7. [PMID: 16847313 PMCID: PMC1592782 DOI: 10.1128/mcb.00471-06] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Revised: 05/06/2006] [Accepted: 05/20/2006] [Indexed: 11/20/2022] Open
Abstract
Mouse metal response element-binding transcription factor-1 (MTF-1) regulates the transcription of genes in response to a variety of stimuli, including exposure to zinc or cadmium, hypoxia, and oxidative stress. Each of these stresses may increase labile cellular zinc, leading to nuclear translocation, DNA binding, and transcriptional activation of metallothionein genes (MT genes) by MTF-1. Several lines of evidence suggest that the highly conserved six-zinc finger DNA-binding domain of MTF-1 also functions as a zinc-sensing domain. In this study, we investigated the potential role of the peptide linkers connecting the four N-terminal zinc fingers of MTF-1 in their zinc-sensing function. Each of these three linkers is unique, completely conserved among all known vertebrate MTF-1 orthologs, and different from the canonical Cys2His2 zinc finger TGEKP linker sequence. Replacing the RGEYT linker between zinc fingers 1 and 2 with TGEKP abolished the zinc-sensing function of MTF-1, resulting in constitutive DNA binding, nuclear translocation, and transcriptional activation of the MT-I gene. In contrast, swapping the TKEKP linker between fingers 2 and 3 with TGEKP had little effect on the metal-sensing functions of MTF-1, whereas swapping the canonical linker for the shorter TGKT linker between fingers 3 and 4 rendered MTF-1 less sensitive to zinc-dependent activation both in vivo and in vitro. These observations suggest a mechanism by which physiological concentrations of accessible cellular zinc affect MTF-1 activity. Zinc may modulate highly specific, linker-mediated zinc finger interactions in MTF-1, thus affecting its zinc- and DNA-binding activities, resulting in translocation to the nucleus and binding to the MT-I gene promoter.
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Affiliation(s)
- Yong Li
- Department of Biochemistry and Molecular Biology, Mail Stop 3030, University of Kansas Medical Center, 39th and Rainbow Blvd., Kansas City, KS 66160-7421, USA
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17
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Chicault C, Toutain B, Monnier A, Aubry M, Fergelot P, Le Treut A, Galibert MD, Mosser J. Iron-related transcriptomic variations in CaCo-2 cells, an in vitro model of intestinal absorptive cells. Physiol Genomics 2006; 26:55-67. [PMID: 16638840 DOI: 10.1152/physiolgenomics.00297.2005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Regulation of iron absorption by duodenal enterocytes is essential for the maintenance of homeostasis by preventing iron deficiency or overload. Despite the identification of a number of genes implicated in iron absorption and its regulation, it is likely that further factors remain to be identified. For that purpose, we used a global transcriptomic approach, using the CaCo-2 cell line as an in vitro model of intestinal absorptive cells. Pangenomic screening for variations in gene expression correlating with intracellular iron content allowed us to identify 171 genes. One hundred nine of these genes are clustered into five types of expression profile. This is the first time that most of these genes have been associated with iron metabolism. Functional annotation of these five clusters indicates potential links between the immune response, proteolysis processes, and iron depletion. In contrast, iron overload is associated with cellular metabolism, especially that of lipids and glutathione involving redox function and electron transfer.
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Affiliation(s)
- Céline Chicault
- Centre National de la Recherche Scientifique UMR 6061 Génétique et Développement, Université de Rennes 1, Groupe Oncogénomique, IFR140 GFAS, Faculté de médecine, Rennes, France
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