1
|
Liu T, Wang X, Jia P, Liu C, Wei Y, Song Y, Li S, Liu L, Wang B, Shi H. Association between serum arginine levels and cancer risk: A community-based nested case-control study. Front Nutr 2022; 9:1069113. [PMID: 36466394 PMCID: PMC9712959 DOI: 10.3389/fnut.2022.1069113] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/02/2022] [Indexed: 01/10/2024] Open
Abstract
OBJECTIVE The effect of arginine on tumors appears to be bidirectional. The association of serum arginine with the risk of incident cancer remains uncovered at present. We aimed to investigate the prospective relationship of baseline serum arginine concentrations with the risk of incident cancer in hypertensive participants. MATERIALS AND METHODS A nested, case-control study with 1,389 incident cancer cases and 1,389 matched controls was conducted using data from the China H-Type Hypertension Registry Study (CHHRS). Conditional logistic regression analyses were performed to evaluate the association between serum arginine and the risk of the overall, digestive system, non-digestive system, and site-specific cancer. RESULTS Compared with matched controls, cancer patients had higher levels of arginine (21.41 μg/mL vs. 20.88 μg/mL, p < 0.05). When serum arginine concentrations were assessed as quartiles, compared with participants in the lowest arginine quartile, participants in the highest arginine quartile had a 32% (OR = 1.32, 95% CI: 1.03 to 1.71), and 68% (OR = 1.68, 95% CI: 1.09 to 2.59) increased risk of overall and digestive system cancer, respectively, in the adjusted models. In the site-specific analysis, each standard deviation (SD) increment of serum arginine was independently and positively associated with the risk of colorectal cancer (OR = 1.35, 95% CI: 1.01 to 1.82) in the adjusted analysis. CONCLUSION We found that hypertensive individuals with higher serum arginine levels exhibited a higher risk of overall, digestive system, and colorectal cancer.
Collapse
Affiliation(s)
- Tong Liu
- Department of Gastrointestinal Surgery/Clinical Nutrition, Capital Medical University Affiliated Beijing Shijitan Hospital, Beijing, China
- Beijing International Science and Technology Cooperation Base for Cancer Metabolism and Nutrition, Beijing, China
- Key Laboratory of Cancer FSMP for State Market Regulation, Beijing, China
| | - Xiaomeng Wang
- Department of Education, Capital Medical University Affiliated Beijing Shijitan Hospital, Beijing, China
| | - Pingping Jia
- Department of Gastrointestinal Surgery/Clinical Nutrition, Capital Medical University Affiliated Beijing Shijitan Hospital, Beijing, China
- Beijing International Science and Technology Cooperation Base for Cancer Metabolism and Nutrition, Beijing, China
- Key Laboratory of Cancer FSMP for State Market Regulation, Beijing, China
| | - Chenan Liu
- Department of Gastrointestinal Surgery/Clinical Nutrition, Capital Medical University Affiliated Beijing Shijitan Hospital, Beijing, China
- Beijing International Science and Technology Cooperation Base for Cancer Metabolism and Nutrition, Beijing, China
- Key Laboratory of Cancer FSMP for State Market Regulation, Beijing, China
| | - Yaping Wei
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, Department of Nutrition and Health, College of Food Sciences and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Yun Song
- Shenzhen Evergreen Medical Institute, Shenzhen, China
| | - Shuqun Li
- Shenzhen Evergreen Medical Institute, Shenzhen, China
| | - Lishun Liu
- Shenzhen Evergreen Medical Institute, Shenzhen, China
| | - Binyan Wang
- Shenzhen Evergreen Medical Institute, Shenzhen, China
| | - Hanping Shi
- Department of Gastrointestinal Surgery/Clinical Nutrition, Capital Medical University Affiliated Beijing Shijitan Hospital, Beijing, China
- Beijing International Science and Technology Cooperation Base for Cancer Metabolism and Nutrition, Beijing, China
- Key Laboratory of Cancer FSMP for State Market Regulation, Beijing, China
| |
Collapse
|
2
|
Chakraborty S, Mukherjee P, Sengupta R. Ribonucleotide reductase: Implications of thiol S-nitrosylation and tyrosine nitration for different subunits. Nitric Oxide 2022; 127:26-43. [PMID: 35850377 DOI: 10.1016/j.niox.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/20/2022] [Accepted: 07/08/2022] [Indexed: 11/20/2022]
Abstract
Ribonucleotide reductase (RNR) is a multi-subunit enzyme responsible for catalyzing the rate-limiting step in the production of deoxyribonucleotides essential for DNA synthesis and repair. The active RNR complex is composed of multimeric R1 and R2 subunits. The RNR catalysis involves the formation of tyrosyl radicals in R2 subunits and thiyl radicals in R1 subunits. Despite the quaternary structure and cofactor diversity, all the three classes of RNR have a conserved cysteine residue at the active site which is converted into a thiyl radical that initiates the substrate turnover, suggesting that the catalytic mechanism is somewhat similar for all three classes of the RNR enzyme. Increased RNR activity has been associated with malignant transformation, cancer cell growth, and tumorigenesis. Efforts concerning the understanding of RNR inhibition in designing potent RNR inhibitors/drugs as well as developing novel approaches for antibacterial, antiviral treatments, and cancer therapeutics with improved radiosensitization have been made in clinical research. This review highlights the precise and potent roles of NO in RNR inhibition by targeting both the subunits. Under nitrosative stress, the thiols of the R1 subunits have been found to be modified by S-nitrosylation and the tyrosyl radicals of the R2 subunits have been modified by nitration. In view of the recent advances and progresses in the field of nitrosative modifications and its fundamental role in signaling with implications in health and diseases, the present article focuses on the regulations of RNR activity by S-nitrosylation of thiols (R1 subunits) and nitration of tyrosyl residues (R2 subunits) which will further help in designing new drugs and therapies.
Collapse
Affiliation(s)
- Surupa Chakraborty
- Amity Institute of Biotechnology, Amity University, Kolkata, 700135, West Bengal, India
| | - Prerona Mukherjee
- Amity Institute of Biotechnology, Amity University, Kolkata, 700135, West Bengal, India
| | - Rajib Sengupta
- Amity Institute of Biotechnology, Amity University, Kolkata, 700135, West Bengal, India.
| |
Collapse
|
3
|
Chakraborty S, Datta S, Ghosh S. Induction of autophagy under nitrosative stress: A complex regulatory interplay between SIRT1 and AMPK in MCF7 cells. Cell Signal 2019; 64:109411. [PMID: 31491460 DOI: 10.1016/j.cellsig.2019.109411] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 08/30/2019] [Accepted: 08/31/2019] [Indexed: 12/18/2022]
Abstract
Induction of nitrosative stress has been observed in various cancer types and in tumor environment. However, it is still unclear how cancer cells combat the effect of nitrosative stress. The main targets of nitrosative stress in cells are cellular lipids, proteins and DNA. Autophagy or self-cleaning generates energy for cell survival under stress conditions. In the present study we investigated the role of autophagy under nitrosative stress in MCF7, a breast cancer cell line. Interestingly, we observed induction of autophagy associated with cell death when MCF7 cells were treated with NO donor compound DETA-NONOate for eight hours. While investigating the mode of cell death under nitrosative stress in MCF7 cells, it was found that it was neither apoptotic nor necrotic. Moreover, nitrosative stress did not alter mitochondrial membrane potential and cellular redox status in MCF7 cells. But we observed an increase in NAD+/NADH and a drop in NADH level in MCF7 cells following NO donor treatment. Sirtuins having NAD+ dependent deacetylase activity, play an important role in cell survival mechanisms. So we further checked the status of SIRT1 under nitrosative stress in MCF7 cells. Surprisingly, we observed an induction of SIRT1, phospho-AMPK and p53 in MCF7 cells under nitrosative stress. Interestingly, autophagy markers were down regulated in MCF7 cells upon treatment with nicotinamide, an inhibitor of SIRT1 activity and dorsomorphin, a phospho-AMPK inhibitor when treated separately under nitrosative stress. To further confirm the role of SIRT1 in the induction of autophagy associated cell death, it was knocked down using si-RNA and nitrosative stress was applied. SIRT1 knock down led to increase in MCF7 cell viability along with down regulation of autophagic markers and phospho-AMPK as well as accumulation of acetylated p53. The increase in p53 controlled DRAM1 mRNA expression in MCF7 cells under nitrosative stress further confirmed a complex interplay between p53, SIRT1 and AMPK under nitrosative stress in MCF7 cells. Altogether our work for the first time suggests a complex inter-twined partnership between AMPK, SIRT1 and p53 in regulating autophagy in response to nitrosative stress in MCF7 cells.
Collapse
Affiliation(s)
- Subhamoy Chakraborty
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, West Bengal, India
| | - Sampurna Datta
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, West Bengal, India
| | - Sanjay Ghosh
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, West Bengal, India.
| |
Collapse
|
4
|
Dos Santos TM, Siebert C, de Oliveira MF, Manfredini V, Wyse ATS. Chronic mild Hyperhomocysteinemia impairs energy metabolism, promotes DNA damage and induces a Nrf2 response to oxidative stress in rats brain. Cell Mol Neurobiol 2019; 39:687-700. [PMID: 30949917 DOI: 10.1007/s10571-019-00674-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 03/28/2019] [Indexed: 12/13/2022]
Abstract
Homocysteine (HCY) has been linked to oxidative stress and varied metabolic changes that are dependent on its concentration and affected tissues. In the present study we evaluate parameters of energy metabolism [succinate dehydrogenase (SDH), complex II and IV (cytochrome c oxidase), and ATP levels] and oxidative stress [DCFH oxidation, nitrite levels, antioxidant enzymes and lipid, protein and DNA damages, as well as nuclear factor erythroid 2-related (Nrf2) protein abundance] in amygdala and prefrontal cortex of HCY-treated rats. Wistar male rats were treated with a subcutaneous injection of HCY (0.03 µmol/g of body weight) from the 30th to 60th post-natal day, twice a day, to induce mild hyperhomocysteinemia (HHCY). The rats were euthanatized without anesthesia at 12 h after the last injection, and amygdala and prefrontal cortex were dissected for biochemical analyses. In the amygdala, mild HHCY increased activities of SDH and complex II and decreased complex IV and ATP level, as well as increased antioxidant enzymes activities (glutathione peroxidase and superoxide dismutase), nitrite levels, DNA damage, and Nrf 2 protein abundance. In the prefrontal cortex, mild HHCY did not alter energy metabolism, but increased glutathione peroxidase, catalase and DNA damage. Other analyzed parameters were not altered by HCY-treatment. Our findings suggested that chronic mild HHCY changes each brain structure, particularly and specifically. These changes may be associated with the mechanisms by which chronic mild HHCY has been linked to the risk factor of fear, mood disorders and depression, as well as in neurodegenerative diseases.
Collapse
Affiliation(s)
- Tiago Marcon Dos Santos
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, CEP 90035-003, Brazil
| | - Cassiana Siebert
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, CEP 90035-003, Brazil
| | - Micaela Federizzi de Oliveira
- Laboratório de Hematologia e Citologia Clínica, Universidade Federal do Pampa, BR 472, Km 592, Caixa Postal 118, Uruguaiana, RS, 97508-000, Brazil
| | - Vanusa Manfredini
- Laboratório de Hematologia e Citologia Clínica, Universidade Federal do Pampa, BR 472, Km 592, Caixa Postal 118, Uruguaiana, RS, 97508-000, Brazil
| | - Angela T S Wyse
- Laboratório de Neuroproteção e Doenças Neurometabólicas, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, CEP 90035-003, Brazil.
| |
Collapse
|
5
|
Datta S, Chakraborty S, Panja C, Ghosh S. Reactive nitrogen species control apoptosis and autophagy in K562 cells: implication of TAp73α induction in controlling autophagy. Free Radic Res 2018; 52:491-506. [DOI: 10.1080/10715762.2018.1449210] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sampurna Datta
- Department of Biochemistry, University of Calcutta, Kolkata, India
| | | | - Chiranjit Panja
- Department of Biochemistry, University of Calcutta, Kolkata, India
| | - Sanjay Ghosh
- Department of Biochemistry, University of Calcutta, Kolkata, India
| |
Collapse
|
6
|
Drozd VM, Branovan I, Shiglik N, Biko J, Reiners C. Thyroid Cancer Induction: Nitrates as Independent Risk Factors or Risk Modulators after Radiation Exposure, with a Focus on the Chernobyl Accident. Eur Thyroid J 2018; 7:67-74. [PMID: 29594057 PMCID: PMC5869559 DOI: 10.1159/000485971] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 12/01/2017] [Indexed: 12/31/2022] Open
Abstract
In recent decades, differentiated thyroid cancer (DTC) incidence has been increasing worldwide. The important contributions to this phenomenon of "overdiagnosis" driven by wider use of improved ultrasound systems are amply documented, notwithstanding the "real" carcinogenic effects of ionizing radiation, e.g., from the Chernobyl accident or health care interventions. Less well understood is the role of nitrates - as environmental pollutants, in diet, and in medication - in thyroid carcinogenesis. Increasing exposure to nitrates is associated with rising incidence of esophageal, stomach, bladder, and colon cancers. Recent data suggest that in agricultural areas with higher mean nitrate levels in groundwater, DTC risk is also elevated. Our work in Belarus after Chernobyl has shown that children in districts with high nitrate concentrations in drinking water had significantly higher thyroid cancer incidence after irradiation than did their counterparts in areas with lower nitrate concentrations. Notwithstanding thyroid shielding, increasing use of computed tomography and dental X-rays heightens radiation exposure of the salivary glands in the general population, especially in children and adolescents. When nitrate intake is increased, salivary gland irradiation may potentially result in carcinogenic elevations in plasma nitric oxide concentrations. In conclusion, excess nitrate intake seems to be an independent risk factor for DTC. Additionally, we hypothesize from our data that high nitrate levels modulate the carcinogenic effect of radiation on the thyroid. Cohort studies, case-control studies, or both, are needed to quantify the effects of nitrates on DTC risk in the presence or absence of radiation exposure, e.g., that associated with diagnostic or therapeutic health care interventions.
Collapse
Affiliation(s)
- Valentina M. Drozd
- The International Fund “Help for patients with radiation-induced thyroid cancer ‘Arnica’”, Minsk, Belarus
- Project Chernobyl, Brooklyn, New York, USA
- *Prof. Valentina M. Drozd, MD, PhD, The International Fund “Help for patients with radiation-induced thyroid cancer ‘Arnica’”, Zolotaya Gorka 11, 1, Minsk 220005 (Belarus), E-Mail
| | | | | | - Johannes Biko
- Clinic and Polyclinic of Nuclear Medicine, University of Würzburg, Würzburg, Germany
| | - Christoph Reiners
- The International Fund “Help for patients with radiation-induced thyroid cancer ‘Arnica’”, Minsk, Belarus
- Clinic and Polyclinic of Nuclear Medicine, University of Würzburg, Würzburg, Germany
| |
Collapse
|
7
|
Peuchant E, Bats ML, Moranvillier I, Lepoivre M, Guitton J, Wendum D, Lacombe ML, Moreau-Gaudry F, Boissan M, Dabernat S. Metastasis suppressor NM23 limits oxidative stress in mammals by preventing activation of stress-activated protein kinases/JNKs through its nucleoside diphosphate kinase activity. FASEB J 2017; 31:1531-1546. [PMID: 28077425 DOI: 10.1096/fj.201600705r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 12/19/2016] [Indexed: 11/11/2022]
Abstract
NME1 (nonmetastatic expressed 1) gene, which encodes nucleoside diphosphate kinase (NDPK) A [also known as nonmetastatic clone 23 (NM23)-H1 in humans and NM23-M1 in mice], is a suppressor of metastasis, but several lines of evidence-mostly from plants-also implicate it in the regulation of the oxidative stress response. Here, our aim was to investigate the physiologic relevance of NDPK A with respect to the oxidative stress response in mammals and to study its molecular basis. NME1-knockout mice died sooner, suffered greater hepatocyte injury, and had lower superoxide dismutase activity than did wild-type (WT) mice in response to paraquat-induced acute oxidative stress. Deletion of NME1 reduced total NDPK activity and exacerbated activation of the stress-related MAPK, JNK, in the liver in response to paraquat. In a mouse transformed hepatocyte cell line and in primary cultures of normal human keratinocytes, MAPK activation in response to H2O2 and UVB, respectively, was dampened by expression of NM23-M1/NM23-H1, dependent on its NDPK catalytic activity. Furthermore, excess or depletion of NM23-M1/NM23-H1 NDPK activity did not affect the intracellular bulk concentration of nucleoside di- and triphosphates. NME1-deficient mouse embryo fibroblasts grew poorly in culture, were more sensitive to stress than WT fibroblasts, and did not immortalize, which suggested that they senesce earlier than do WT fibroblasts. Collectively, these results indicate that the NDPK activity of NM23-M1/NM23-H1 protects cells from acute oxidative stress by inhibiting activation of JNK in mammal models.-Peuchant, E., Bats, M.-L., Moranvillier, I., Lepoivre, M., Guitton, J., Wendum, D., Lacombe, M.-L., Moreau-Gaudry, F., Boissan, M., Dabernat, S. Metastasis suppressor NM23 limits oxidative stress in mammals by preventing activation of stress-activated protein kinases/JNKs through its nucleoside diphosphate kinase activity.
Collapse
Affiliation(s)
- Evelyne Peuchant
- Collège Santé Université de Bordeaux, Bordeaux, France.,INSERM 1035, Bordeaux, France.,Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Marie-Lise Bats
- Collège Santé Université de Bordeaux, Bordeaux, France.,Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Isabelle Moranvillier
- Collège Santé Université de Bordeaux, Bordeaux, France.,INSERM 1035, Bordeaux, France
| | - Michel Lepoivre
- Université Paris Sud, Commissariat à l'Énergie Atomique et aux Énergies, Unité Mixte de Recherche, Centre National de la Recherche Scientifique 9198, Orsay, France
| | - Jérôme Guitton
- Hospices Civils de Lyon, Pierre Bénite, France.,Université de Lyon, Lyon, France
| | - Dominique Wendum
- Sorbonne Universités, Université Pierre et Marie Curie, Université Paris 06, INSERM, Unité Mixte de Recherche S938, Saint-Antoine Research Center, Paris, France.,Laboratoire d'Anatomie Pathologique, Hôpital Saint-Antoine, Paris, France
| | - Marie-Lise Lacombe
- Sorbonne Universités, Université Pierre et Marie Curie, Université Paris 06, INSERM, Unité Mixte de Recherche S938, Saint-Antoine Research Center, Paris, France
| | - François Moreau-Gaudry
- Collège Santé Université de Bordeaux, Bordeaux, France.,INSERM 1035, Bordeaux, France.,Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - Mathieu Boissan
- Sorbonne Universités, Université Pierre et Marie Curie, Université Paris 06, INSERM, Unité Mixte de Recherche S938, Saint-Antoine Research Center, Paris, France; .,Service de Biochimie et Hormonologie, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Sandrine Dabernat
- Collège Santé Université de Bordeaux, Bordeaux, France; .,INSERM 1035, Bordeaux, France.,Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| |
Collapse
|
8
|
Osterman Golkar S, Czene S, Gokarakonda A, Haghdoost S. Intracellular deoxyribonucleotide pool imbalance and DNA damage in cells treated with hydroxyurea, an inhibitor of ribonucleotide reductase. Mutagenesis 2013; 28:653-60. [PMID: 24078015 DOI: 10.1093/mutage/get044] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Imbalance in the nucleotide pool of mammalian cells has been shown to result in genotoxic damage. The goal of this study was to devise a sensitive, reproducible and simple method for detection of nucleotide pool changes in mammalian cells that could be used for problem-solving activities in drug development, e.g. mechanistic explanation of a positive response in a mammalian in vitro genotoxicity test. The method evaluated in this study is based on ethanol extraction of the total nucleotide pool, heat treatment and filtration, treatment with calf intestine alkaline phosphatase to convert nucleotides to nucleosides and analysis of the nucleosides by high-performance liquid chromatography with ultraviolet detection. The method was applied to measure the intracellular levels of deoxyribonucleotides in mouse lymphoma (ML) L5178Y cells treated with various concentrations of a model compound, hydroxyurea (HU), a ribonucleotide reductase inhibitor. DNA strand breakage and micronuclei formation were assessed in the same experiments. Imbalance of nucleotide pool (i.e. changes in the relative ratios between individual nucleotide pools) in HU-treated ML cells has been observed already at a concentration of 0.01 mmol/l, whereas genotoxic effects became apparent only at higher concentrations of HU (i.e. 0.25 mmol/l and higher) as indicated by formation of DNA strand breaks and micronuclei.
Collapse
Affiliation(s)
- Siv Osterman Golkar
- Department of Molecular Bioscience, Centre for Radiation Protection Research, Wenner-Gren Institute, Stockholm University, Stockholm SE-106 91, Sweden
| | | | | | | |
Collapse
|
9
|
Gardner PR. Hemoglobin: a nitric-oxide dioxygenase. SCIENTIFICA 2012; 2012:683729. [PMID: 24278729 PMCID: PMC3820574 DOI: 10.6064/2012/683729] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 10/04/2012] [Indexed: 05/09/2023]
Abstract
Members of the hemoglobin superfamily efficiently catalyze nitric-oxide dioxygenation, and when paired with native electron donors, function as NO dioxygenases (NODs). Indeed, the NOD function has emerged as a more common and ancient function than the well-known role in O2 transport-storage. Novel hemoglobins possessing a NOD function continue to be discovered in diverse life forms. Unique hemoglobin structures evolved, in part, for catalysis with different electron donors. The mechanism of NOD catalysis by representative single domain hemoglobins and multidomain flavohemoglobin occurs through a multistep mechanism involving O2 migration to the heme pocket, O2 binding-reduction, NO migration, radical-radical coupling, O-atom rearrangement, nitrate release, and heme iron re-reduction. Unraveling the physiological functions of multiple NODs with varying expression in organisms and the complexity of NO as both a poison and signaling molecule remain grand challenges for the NO field. NOD knockout organisms and cells expressing recombinant NODs are helping to advance our understanding of NO actions in microbial infection, plant senescence, cancer, mitochondrial function, iron metabolism, and tissue O2 homeostasis. NOD inhibitors are being pursued for therapeutic applications as antibiotics and antitumor agents. Transgenic NOD-expressing plants, fish, algae, and microbes are being developed for agriculture, aquaculture, and industry.
Collapse
Affiliation(s)
- Paul R. Gardner
- Miami Valley Biotech, 1001 E. 2nd Street, Suite 2445, Dayton, OH 45402, USA
| |
Collapse
|
10
|
Kalmár J, Biri B, Lente G, Bányai I, Budimir A, Biruš M, Batinić-Haberle I, Fábián I. Detailed mechanism of the autoxidation of N-hydroxyurea catalyzed by a superoxide dismutase mimic Mn(III) porphyrin: formation of the nitrosylated Mn(II) porphyrin as an intermediate. Dalton Trans 2012; 41:11875-84. [PMID: 22911446 DOI: 10.1039/c2dt31200j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The in vitro autoxidation of N-hydroxyurea (HU) is catalyzed by Mn(III)TTEG-2-PyP(5+), a synthetic water soluble Mn(III) porphyrin which is also a potent mimic of the enzyme superoxide dismutase. The detailed mechanism of the reaction is deduced from kinetic studies under basic conditions mostly based on data measured at pH = 11.7 but also including some pH-dependent observations in the pH range 9-13. The major intermediates were identified by UV-vis spectroscopy and electrospray ionization mass spectrometry. The reaction starts with a fast axial coordination of HU to the metal center of Mn(III)TTEG-2-PyP(5+), which is followed by a ligand-to-metal electron transfer to get Mn(II)TTEG-2-PyP(4+) and the free radical derived from HU (HU˙). Nitric oxide (NO) and nitroxyl (HNO) are minor intermediates. The major pathway for the formation of the most significant intermediate, the {MnNO} complex of Mn(II)TTEG-2-PyP(4+), is the reaction of Mn(II)TTEG-2-PyP(4+) with NO. We have confirmed that the autoxidation of the intermediates opens alternative reaction channels, and the process finally yields NO(2)(-) and the initial Mn(III)TTEG-2-PyP(5+). The photochemical release of NO from the {MnNO} intermediate was also studied. Kinetic simulations were performed to validate the deduced rate constants. The investigated reaction has medical implications: the accelerated production of NO and HNO from HU may be utilized for therapeutic purposes.
Collapse
Affiliation(s)
- József Kalmár
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Debrecen, Hungary H-4010, POB-21
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Tebbi A, Guittet O, Cottet MH, Vesin MF, Lepoivre M. TAp73 induction by nitric oxide: regulation by checkpoint kinase 1 (CHK1) and protection against apoptosis. J Biol Chem 2011; 286:7873-7884. [PMID: 21212274 DOI: 10.1074/jbc.m110.184879] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Nitric oxide (NO) is a potent activator of the p53 tumor suppressor protein, thereby inducing cell cycle arrest and apoptosis. However, little is known about the regulation of the two other p53-family members, p63 and p73, by nitrogen oxides. We report here an up-regulation of p73 by NO in p53-null K-562 leukemia cells. Chemical NO prodrugs or macrophage iNOS activity induced an accumulation of the TAp73α isoform in these cells, whereas macrophages from iNOS(-/-) mice did not. NO also up-regulated TAp73 mRNA expression, suggesting a transcriptional regulation. The checkpoint kinases Chk1 and Chk2 can regulate TAp73 induction after DNA damage. We show that these kinases were rapidly phosphorylated upon NO treatment. Genetic silencing or pharmacological inhibition of Chk1 impaired NO-mediated accumulation of TAp73α. Because NO is known to block DNA synthesis through ribonucleotide reductase inhibition, the up-regulation of TAp73α might be caused by DNA damage induced by an arrest of DNA replication forks. In support of this hypothesis, DNA replication inhibitors such as hydroxyurea and aphidicolin similarly enhanced TAp73α expression and Chk1 phosphorylation. Moreover, inhibition of Chk1 also prevented TAp73α accumulation in response to replication inhibitors. The knockdown of TAp73 with siRNA sensitized K-562 cells to apoptosis induced by a nitrosative (NO) or oxidative (H(2)O(2)) injury. Therefore, TAp73α has an unusual cytoprotective role in K-562 cells, contrasting with its pro-apoptotic functions in many other cell models. In conclusion, NO up-regulates several p53 family members displaying pro- and anti-apoptotic effects, suggesting a complex network of interactions and cross-regulations between NO production and p53-related proteins.
Collapse
Affiliation(s)
- Ali Tebbi
- From the Université Paris-Sud, Institute of Molecular and Cellular Biochemistry and Biophysics, UMR 8619, F-91405 Orsay, France,; CNRS, F-91405 Orsay, France, and; the Division of Endocrinology, Diabetes, and Metabolism, Department of Molecular Medicine, University of Utah School of Medicine, Salt Lake City, Utah 84112
| | - Olivier Guittet
- From the Université Paris-Sud, Institute of Molecular and Cellular Biochemistry and Biophysics, UMR 8619, F-91405 Orsay, France,; CNRS, F-91405 Orsay, France, and
| | - Marie-Hélène Cottet
- From the Université Paris-Sud, Institute of Molecular and Cellular Biochemistry and Biophysics, UMR 8619, F-91405 Orsay, France,; CNRS, F-91405 Orsay, France, and
| | - Marie-Françoise Vesin
- From the Université Paris-Sud, Institute of Molecular and Cellular Biochemistry and Biophysics, UMR 8619, F-91405 Orsay, France,; CNRS, F-91405 Orsay, France, and
| | - Michel Lepoivre
- From the Université Paris-Sud, Institute of Molecular and Cellular Biochemistry and Biophysics, UMR 8619, F-91405 Orsay, France,; CNRS, F-91405 Orsay, France, and.
| |
Collapse
|
12
|
Desler C, Lykke A, Rasmussen LJ. The effect of mitochondrial dysfunction on cytosolic nucleotide metabolism. J Nucleic Acids 2010; 2010. [PMID: 20862377 PMCID: PMC2938461 DOI: 10.4061/2010/701518] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 07/19/2010] [Indexed: 12/13/2022] Open
Abstract
Several enzymes of the metabolic pathways responsible for metabolism of cytosolic ribonucleotides and deoxyribonucleotides are located in mitochondria. Studies described in this paper suggest dysfunction of the mitochondria to affect these metabolic pathways and limit the available levels of cytosolic ribonucleotides and deoxyribonucleotides, which in turn can result in aberrant RNA and DNA synthesis. Mitochondrial dysfunction has been linked to genomic instability, and it is possible that the limiting effect of mitochondrial dysfunction on the levels of nucleotides and resulting aberrant RNA and DNA synthesis in part can be responsible for this link. This paper summarizes the parts of the metabolic pathways responsible for nucleotide metabolism that can be affected by mitochondrial dysfunction.
Collapse
Affiliation(s)
- Claus Desler
- Center for Healthy Aging, Faculty of Health Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | | | | |
Collapse
|
13
|
Rai P. Oxidation in the nucleotide pool, the DNA damage response and cellular senescence: Defective bricks build a defective house. Mutat Res 2010; 703:71-81. [PMID: 20673809 DOI: 10.1016/j.mrgentox.2010.07.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Accepted: 07/19/2010] [Indexed: 12/20/2022]
Abstract
Activation of persistent DNA damage response (DDR) signaling is associated with the induction of a permanent proliferative arrest known as cellular senescence, a phenomenon intrinsically linked to both tissue aging as well as tumor suppression. The DNA damage observed in senescent cells has been attributed to elevated levels of reactive oxygen species (ROS), failing DNA damage repair processes, and/or oncogenic activation. It is not clear how labile molecules such as ROS are able to damage chromatin-bound DNA to a sufficient extent to invoke persistent DNA damage and DDR signaling. Recent evidence suggests that the nucleotide pool is a significant target for oxidants and that oxidized nucleotides, once incorporated into genomic DNA, can lead to the induction of a DNA strand break-associated DDR that triggers senescence in normal cells and in cells sustaining oncogene activation. Evasion of this DDR and resulting senescence is a key step in tumor progression. This review will explore the role of oxidation in the nucleotide pool as a major effector of oxidative stress-induced genotoxic damage and DDR in the context of cellular senescence and tumorigenic transformation.
Collapse
Affiliation(s)
- Priyamvada Rai
- Division of Gerontology and Geriatric Medicine, Department of Medicine, Rosenstiel Medical Sciences Building, Rm#7094/Locator Code: D-503, 1600 NW 10th Ave, Miller School of Medicine, University of Miami, Miami, FL 33136, United States.
| |
Collapse
|
14
|
Heffeter P, Popovic-Bijelic A, Saiko P, Dornetshuber R, Jungwirth U, Voevodskaya N, Biglino D, Jakupec MA, Elbling L, Micksche M, Szekeres T, Keppler BK, Gräslund A, Berger W. Ribonucleotide reductase as one important target of [Tris(1,10-phenanthroline)lanthanum(III)] trithiocyanate (KP772). Curr Cancer Drug Targets 2009; 9:595-607. [PMID: 19508176 DOI: 10.2174/156800909789056962] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Accepted: 04/15/2009] [Indexed: 12/11/2022]
Abstract
KP772 is a new lanthanum complex containing three 1,10-phenathroline molecules. Recently, we have demonstrated that the promising in vitro and in vivo anticancer properties of KP772 are based on p53-independent G(0)G(1) arrest and apoptosis induction. A National Cancer Institute (NCI) screen revealed significant correlation of KP772 activity with that of the ribonucleotide reductase (RR) inhibitor hydroxyurea (HU). Consequently, this study aimed to investigate whether KP772 targets DNA synthesis in tumor cells by RR inhibition. Indeed, KP772 treatment led to significant reduction of cytidine incorporation paralleled by a decrease of deoxynucleoside triphosphate (dNTP) pools. This strongly indicates disruption of RR activity. Moreover, KP772 protected against oxidative stress, suggesting that this drug might interfere with RR by interaction with the tyrosyl radical in subunit R2. Additionally, several observations (e.g. increase of transferrin receptor expression and protective effect of iron preloading) indicate that KP772 interferes with cellular iron homeostasis. Accordingly, co-incubation of Fe(II) with KP772 led to generation of a coloured iron complex (Fe-KP772) in cell free systems. In electron paramagnetic resonance (EPR) measurements of mouse R2 subunits, KP772 disrupted the tyrosyl radical while Fe-KP772 had no significant effects. Moreover, coincubation of KP772 with iron-loaded R2 led to formation of Fe-KP772 suggesting chelation of RR-bound Fe(II). Summarizing, our data prove that KP772 inhibits RR by targeting the iron centre of the R2 subunit. As also Fe-KP772 as well as free lanthanum exert significant -though less pronounced- cytotoxic/static activities, additional mechanisms are likely to synergise with RR inhibition in the promising anticancer activity of KP772.
Collapse
Affiliation(s)
- P Heffeter
- Institute of Cancer Research, Department of Medicine I, Medical University of Vienna, 1090 Vienna, Austria
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Lemaire G, Guittet O, Vesin MF, Lepoivre M, Cottet MH. Glutathione depletion reveals impairment of antigen processing and inhibition of cathepsin activity by nitric oxide in antigen-presenting cells. Mol Immunol 2009; 46:1100-8. [DOI: 10.1016/j.molimm.2008.10.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Accepted: 10/14/2008] [Indexed: 01/26/2023]
|
16
|
Sangsuwan T, Haghdoost S. The nucleotide pool, a target for low-dose gamma-ray-induced oxidative stress. Radiat Res 2009; 170:776-83. [PMID: 19138035 DOI: 10.1667/rr1399.1] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Accepted: 08/08/2008] [Indexed: 11/03/2022]
Abstract
Oxidative stress occurs when the generation of reactive oxygen species (ROS) exceeds the cellular antioxidant capacity. The excess ROS react with and modify cellular components. Nucleic acid modifications are of principal interest because they may cause mutations. 8-Oxo-7,8-dihydro-2 -deoxyguanosine (8-oxo-dG) is a mutagenic lesion that can be formed by ROS in DNA as well as in the nucleotide pool. 8-Oxo-dG is removed from the DNA by base excision repair and from the nucleotide pool by the nucleotide sanitization enzyme hMTH1. hMTH1 hydrolyzes 8-oxo-dGTP to 8-oxo-dGMP, which is released to the extracellular environment and can serve as a marker of oxidative stress. The aim of this work was to establish the dose-response relationship for radiation-induced extracellular 8-oxo-dG and hMTH1 in the mGy range of gamma rays in three cellular model systems: human whole blood, human fibroblasts and stimulated lymphocytes. Extracellular 8-oxo-dG was analyzed with the use of an ELISA and hMTH1 by Western blotting. Our results demonstrate that low-dose ionizing radiation induces a stress response that leads to the formation of extracellular 8-oxo-dG and induction of hMTH1 in all three cellular model systems tested. This suggests that the nucleotide pool is an important target for radiation-induced stress response.
Collapse
|
17
|
Fujikura Y, Kudlackova P, Vokurka M, Krijt J, Melkova Z. The effect of nitric oxide on vaccinia virus-encoded ribonucleotide reductase. Nitric Oxide 2008; 20:114-21. [PMID: 18951991 DOI: 10.1016/j.niox.2008.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 09/29/2008] [Accepted: 09/30/2008] [Indexed: 10/21/2022]
Abstract
Growth inhibition of the DNA virus vaccinia (VACV) by NO is known to occur at the level of DNA synthesis. This inhibition is partially reversed by addition of deoxyribonucleosides, suggesting that NO or NO-related species inhibit viral ribonucleotide reductase (RR). However, the effect of NO on VACV-encoded RR or other DNA-synthesizing enzymes has not been demonstrated. In order to study the effects of NO on VACV-encoded RR, DNA polymerase (DNA pol) and thymidine kinase (TK), we generated a VACV recombinant expressing murine macrophage iNOS under control of a VACV early/late promoter p7.5. Using this recombinant, we demonstrate that expression of iNOS and the resulting production of NO inhibit activity of the viral RR, but not of viral DNA pol and TK. This NO-mediated inhibition of viral RR occurred around the same time as the increase of ADP levels, while it preceded the block in VACV DNA synthesis and the decrease of ATP levels. In addition, we tested the effects of DPTA/NONOate on the growth of different VACV mutants. Fold-inhibition of the growth of VACV deletion mutant for TK was comparable to that of wild-type VACV. VACV containing amplification of the gene for the small subunit of RR appeared to be least sensitive to DPTA/NONOate, while VACV deletion mutant for the large subunit of RR was most sensitive. The results provide a direct evidence for NO-mediated inhibition of VACV-encoded RR.
Collapse
Affiliation(s)
- Yuzo Fujikura
- Institute of Pathological Physiology, 1st Medical Faculty, Charles University, Prague, Czech Republic
| | | | | | | | | |
Collapse
|
18
|
Guittet O, Tebbi A, Cottet MH, Vésin F, Lepoivre M. Upregulation of the p53R2 ribonucleotide reductase subunit by nitric oxide. Nitric Oxide 2008; 19:84-94. [DOI: 10.1016/j.niox.2008.04.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Revised: 04/15/2008] [Accepted: 04/15/2008] [Indexed: 11/12/2022]
|
19
|
Lu Z, Tao Y, Zhou Z, Zhang J, Li C, Ou L, Zhao B. Mitochondrial reactive oxygen species and nitric oxide-mediated cancer cell apoptosis in 2-butylamino-2-demethoxyhypocrellin B photodynamic treatment. Free Radic Biol Med 2006; 41:1590-605. [PMID: 17045927 DOI: 10.1016/j.freeradbiomed.2006.08.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2006] [Revised: 07/19/2006] [Accepted: 08/26/2006] [Indexed: 01/13/2023]
Abstract
Photodynamic therapy (PDT) is a novel and promising cancer treatment which employs a combination of a photosensitizing chemical and visible light to induce apoptosis in cancer cells. Singlet oxygen has been recognized as the main origin of oxidative stress in PDT. However, the precise mechanism of PDT-induced apoptosis is not well characterized, especially the dualistic role of nitric oxide (NO). To dissect the apoptosis pathways triggered by PDT, the intracellular free radicals in MCF-7 cells were investigated by examining a novel photosensitizer 2-butylamino-2-demethoxyhypocrellin B (2-BA-2-DMHB)-mediated PDT. It was found that exposure of the cells to 2-BA-2-DMHB and irradiation resulted in a significant increase of intracellular ROS in minutes, and then followed by cytoplasmic free calcium enhancement, mitochondrial nitric oxide synthase (mtNOS) activation, cytochrome c release, and apoptotic death. Scavengers of singlet oxygen or NO could attenuate PDT-induced cell viability loss, nucleus morphology changes, cytochrome c release, mitochondria swelling, and apo-apoptosis gene p53 and p21 mRNA levels. The results suggested that both ROS and NO played important roles in the apoptosis-induced by PDT.
Collapse
Affiliation(s)
- Zhongbing Lu
- State Key Laboratory of Brain and Recognition Laboratory, Institute of Biophysics, The Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
20
|
Hrabák A, Bökönyi G, Orfi L, Bajor T, Kéri G. Comparison of the cytotoxic effects of receptor tyrosine kinase inhibitors on macrophage functions; possible side effects in the immune defense. Immunol Lett 2006; 107:169-75. [PMID: 17098294 DOI: 10.1016/j.imlet.2006.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2006] [Accepted: 09/25/2006] [Indexed: 10/24/2022]
Abstract
Certain receptor tyrosine kinase (RTK) inhibitors reduced the phagocytic capacity of rat macrophages, without influencing the binding of bacteria to macrophage surface. The NO production of elicited rat macrophages was also decreased due to the inhibition of the expression of NOS II. The most potent inhibitory compound was PD166326 (6-(2,6-dichloro-phenyl)-2-(4-hydroxy-phenylamino)-8-methyl-8H-pyrido[2,3-d]pyrimidin-7-one) belonging to a family of RTK inhibitors of broad spectra. These impairing effects could be explained by the apoptosis inducing property of the inhibitor, evidenced by the destroyed mitochondrial membrane potential. The MTT cell viability test indicated a slight, but significant injury of macrophages. In addition to this compound, two other tested RTK inhibitors caused less marked impairment of macrophage functions, while four compounds were not efficient on macrophages at all. Nevertheless, these damaging effects of the inhibitors did not reduce the anti-tumor effect of the RTK inhibitors on COS 7 cells as evidenced by MTT test and apoptosis study. However, these side effects may be important when RTK inhibitors are selected against tumor growth, indicating that certain inhibitors may impair the immune defense during therapeutical application.
Collapse
Affiliation(s)
- András Hrabák
- Department of Medical Chemistry, Molecular Biology and Pathobiochemistry, Semmelweis University, Budapest, Hungary.
| | | | | | | | | |
Collapse
|
21
|
Godoy VG, Jarosz DF, Walker FL, Simmons LA, Walker GC. Y-family DNA polymerases respond to DNA damage-independent inhibition of replication fork progression. EMBO J 2006; 25:868-79. [PMID: 16482223 PMCID: PMC1383567 DOI: 10.1038/sj.emboj.7600986] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Accepted: 01/10/2006] [Indexed: 01/20/2023] Open
Abstract
In Escherichia coli, the Y-family DNA polymerases Pol IV (DinB) and Pol V (UmuD2'C) enhance cell survival upon DNA damage by bypassing replication-blocking DNA lesions. We report a unique function for these polymerases when DNA replication fork progression is arrested not by exogenous DNA damage, but with hydroxyurea (HU), thereby inhibiting ribonucleotide reductase, and bringing about damage-independent DNA replication stalling. Remarkably, the umuC122::Tn5 allele of umuC, dinB, and certain forms of umuD gene products endow E. coli with the ability to withstand HU treatment (HUR). The catalytic activities of the UmuC122 and DinB proteins are both required for HUR. Moreover, the lethality brought about by such stalled replication forks in the wild-type derivatives appears to proceed through the toxin/antitoxin pairs mazEF and relBE. This novel function reveals a role for Y-family polymerases in enhancing cell survival under conditions of nucleotide starvation, in addition to their established functions in response to DNA damage.
Collapse
Affiliation(s)
- Veronica G Godoy
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Biology, Northeastern University, Boston, MA, USA
| | - Daniel F Jarosz
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Fabianne L Walker
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Lyle A Simmons
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Graham C Walker
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Biology, Massachusetts Institute of Technology, 68-633, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. Tel.: +1 617 253 6716; Fax: +1 617 253 2643; E-mail:
| |
Collapse
|
22
|
Staib F, Robles AI, Varticovski L, Wang XW, Zeeberg BR, Sirotin M, Zhurkin VB, Hofseth LJ, Hussain SP, Weinstein JN, Galle PR, Harris CC. The p53 tumor suppressor network is a key responder to microenvironmental components of chronic inflammatory stress. Cancer Res 2006; 65:10255-64. [PMID: 16288013 PMCID: PMC1421332 DOI: 10.1158/0008-5472.can-05-1714] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Activation of the p53 network plays a central role in the inflammatory stress response associated with ulcerative colitis and may modulate cancer risk in patients afflicted with this chronic disease. Here, we describe the gene expression profiles associated with four microenvironmental components of the inflammatory response (NO*, H2O2, DNA replication arrest, and hypoxia) that result in p53 stabilization and activation. Isogenic HCT116 and HCT116 TP53-/- colon cancer cells were exposed to the NO* donor Sper/NO, H2O2, hypoxia, or hydroxyurea, and their mRNA was analyzed using oligonucleotide microarrays. Overall, 1,396 genes changed in a p53-dependent manner (P < 0.001), with the majority representing a "unique" profile for each condition. Only 14 genes were common to all four conditions. Included were eight known p53 target genes. Hierarchical sample clustering distinguished early (1 and 4 hours) from late responses (8, 12, and 24 hours), and each treatment was differentiated from the others. Overall, NO* and hypoxia stimulated similar transcriptional responses. Gene ontology analysis revealed cell cycle as a key feature of stress responses and confirmed the similarity between NO* and hypoxia. Cell cycle profiles analyzed by flow cytometry showed that NO* and hypoxia induced quiescent S-phase and G2-M arrest. Using a novel bioinformatic algorithm, we identified several putative p53-responsive elements among the genes induced in a p53-dependent manner, including four [KIAA0247, FLJ12484, p53CSV (HSPC132), and CNK (PLK3)] common to all exposures. In summary, the inflammatory stress response is a complex, integrated biological network in which p53 is a key molecular node regulating gene expression.
Collapse
Affiliation(s)
| | | | | | | | | | - Michail Sirotin
- Experimental and Computational Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland
| | - Victor B. Zhurkin
- Experimental and Computational Biology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland
| | - Lorne J. Hofseth
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of South Carolina, Columbia, South Carolina; and
| | | | | | - Peter R. Galle
- First Department of Internal Medicine, Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Curtis C. Harris
- Laboratories of Human Carcinogenesis
- Requests for reprints: Curtis C. Harris, Laboratory of Human Carcinogenesis, National Cancer Institute, NIH, 37 Convent Drive, Room 3068, MSC 4255, Bethesda, MD 20892-4255. Phone: 301-496-2048; Fax: 301-496-0497; E-mail:
| |
Collapse
|
23
|
Abstract
Arginine is a dibasic, cationic, semiessential amino acid with numerous roles in cellular metabolism. It serves as an intermediate in the urea cycle and as a precursor for protein, polyamine, creatine and nitric oxide (NO) biosynthesis. Arginine is conditionally essential since it becomes necessary under periods of growth and after recovery after injury. Arginine also promotes wound healing and functions as a secretagogue stimulating the release of growth hormone, insulin-like growth factor 1, insulin, and prolactin. Furthermore, arginine has several immunomodulatory effects such as stimulating T- and natural killer cell activity and influencing pro-inflammatory cytokine levels. The discover that l-arginine is the sole precursor for the multifunctional messenger molecule nitric oxide (NO) led to investigation into the role of arginine in numerous physiologic and pathophysiologic phenomena including cancer. Although NO was first identified in endothelial cells, it is now recognized to be generated by a variety of cell types, including several tumor cell lines and solid human tumors. Unfortunately, the precise role of NO in cancer is poorly understood but it may influence tumor initiation, promotion, and progression, tumor-cell adhesion, apoptosis angiogenesis, differentiation, chemosensitivity, radiosensitivity, and tumor-induced immunosuppression. The biological effects of NO are complex and dependent upon numerous regulatory factors. Further research is necessary to enhance our understanding of the complex mechanisms that regulate NO's role in tumor biology. A better understanding of the role of arginine-derived NO in cancer may lead to novel antineoplastic and chemopreventative strategies.
Collapse
Affiliation(s)
- D Scott Lind
- Department of Surgery, University of Florida College of Medicine, Surgical Services, North Florida South Georgia VA Health Care System, Gainesville, FL 32608, USA.
| |
Collapse
|