1
|
Haller F, Jimenez K, Baumgartner M, Lang M, Klotz A, Jambrich M, Busslinger G, Müllauer L, Khare V, Gasche C. Nfe2l2/NRF2 Deletion Attenuates Tumorigenesis and Increases Bacterial Diversity in a Mouse Model of Lynch Syndrome. Cancer Prev Res (Phila) 2024; 17:311-324. [PMID: 38643981 DOI: 10.1158/1940-6207.capr-23-0478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 02/29/2024] [Accepted: 04/18/2024] [Indexed: 04/23/2024]
Abstract
Lynch syndrome (LS) is the most prevalent heritable form of colorectal cancer. Its early onset and high lifetime risk for colorectal cancer emphasize the necessity for effective chemoprevention. NFE2L2 (NRF2) is often considered a potential druggable target, and many chemopreventive compounds induce NRF2. However, although NRF2 counteracts oxidative stress, it is also overexpressed in colorectal cancer and may promote tumorigenesis. In this study, we evaluated the role of NRF2 in the prevention of LS-associated neoplasia. We found increased levels of NRF2 in intestinal epithelia of mice with intestinal epithelium-specific Msh2 deletion (MSH2ΔIEC) compared with C57BL/6 (wild-type) mice, as well as an increase in downstream NRF2 targets NAD(P)H dehydrogenase (quinone 1) and glutamate-cysteine ligase catalytic subunit. Likewise, NRF2 levels were increased in human MSH2-deficient LS tumors compared with healthy human controls. In silico analysis of a publicly accessible RNA sequencing LS dataset also found an increase in downstream NRF2 targets. Upon crossing MSH2ΔIEC with Nrf2null (MSH2ΔIECNrf2null) mice, we unexpectedly found reduced tumorigenesis in MSH2ΔIECNrf2null mice compared with MSH2ΔIEC mice after 40 weeks, which occurred despite an increase in oxidative damage in MSH2ΔIECNrf2null mice. The loss of NRF2 impaired proliferation as seen by Ki67 intestinal staining and in organoid cultures. This was accompanied by diminished WNT/β-catenin signaling, but apoptosis was unaffected. Microbial α-diversity increased over time with the loss of NRF2 based upon 16S rRNA gene amplicon sequencing of murine fecal samples. Altogether, we show that NRF2 protein levels are increased in MSH2 deficiency and associated neoplasia, but the loss of NRF2 attenuates tumorigenesis. Activation of NRF2 may not be a feasible strategy for chemoprevention in LS. Prevention Relevance: Patients with LS have an early onset and high lifetime risk for colorectal cancer. In this study, we show that NRF2 protein levels are increased in MSH2 deficiency and associated neoplasia, but the loss of NRF2 attenuates tumorigenesis. This suggests that NRF2 may not be a tumor suppressor in this specific context.
Collapse
Affiliation(s)
- Felix Haller
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| | - Kristine Jimenez
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| | - Maximilian Baumgartner
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| | - Michaela Lang
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
- Division of Microbial Ecology, Department of Microbiology and Ecosystem Science, Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria
| | - Anton Klotz
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| | - Manuela Jambrich
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| | - Georg Busslinger
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Leonhard Müllauer
- Department of Pathology, Medical University of Vienna, Vienna, Austria
| | - Vineeta Khare
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| | - Christoph Gasche
- Division of Gastroenterology and Hepatology, Department of Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| |
Collapse
|
2
|
Peng S, Shen L, Yu X, Zhang L, Xu K, Xia Y, Zha L, Wu J, Luo H. The role of Nrf2 in the pathogenesis and treatment of ulcerative colitis. Front Immunol 2023; 14:1200111. [PMID: 37359553 PMCID: PMC10285877 DOI: 10.3389/fimmu.2023.1200111] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 05/22/2023] [Indexed: 06/28/2023] Open
Abstract
Ulcerative colitis (UC) is a chronic inflammatory bowel disease involving mainly the colorectal mucosa and submucosa, the incidence of which has been on the rise in recent years. Nuclear factor erythroid 2-related factor 2 (Nrf2), known for its key function as a transcription factor, is pivotal in inducing antioxidant stress and regulating inflammatory responses. Numerous investigations have demonstrated the involvement of the Nrf2 pathway in maintaining the development and normal function of the intestine, the development of UC, and UC-related intestinal fibrosis and carcinogenesis; meanwhile, therapeutic agents targeting the Nrf2 pathway have been widely investigated. This paper reviews the research progress of the Nrf2 signaling pathway in UC.
Collapse
Affiliation(s)
- Shuai Peng
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Digestive Diseases, Wuhan, China
| | - Lei Shen
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Digestive Diseases, Wuhan, China
| | - Xiaoyun Yu
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Zhang
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Ke Xu
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yuan Xia
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Digestive Diseases, Wuhan, China
| | - Lanlan Zha
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Digestive Diseases, Wuhan, China
| | - Jing Wu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Digestive Diseases, Wuhan, China
| | - Hesheng Luo
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China
- Hubei Key Laboratory of Digestive Diseases, Wuhan, China
| |
Collapse
|
3
|
Milholli LA, Dalbó J, Couto CVMS, Oliveira MM, Santos JGD, Peterle GT, Archanjo AB, Silva PI, Boeloni JN, Nunes FD, Silva AMÁD, Trivilin LO. Effects of the juçara fruit (Euterpe edulis Martius) pulp and lyophilized extract on NRF2, KEAP1, SOD1, and GPX2 expression in human colorectal cancer cell lines. Braz J Med Biol Res 2023; 56:e12558. [PMID: 37075346 PMCID: PMC10125801 DOI: 10.1590/1414-431x2023e12558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 03/15/2023] [Indexed: 04/21/2023] Open
Abstract
We investigated the effects of the juçara fruit (Euterpe edulis Martius) pulp and lyophilized extract on the expression of cytoprotective genes nuclear factor erythroid 2 (NF-E2)-related factor 2 (NRF2), kelch-like ECH-associated protein 1 (KEAP1), superoxide dismutase (SOD1), and glutathione peroxidase (GPX2) in human colorectal cancer cell lines (HT-29 and Caco-2). Cells were cultured for 24 h in Dulbecco's Modified Eagle's Medium containing juçara fruit pulp (5, 10, or 50 mg/mL) or lyophilized extract (0.05, 0.1, or 0.5 mg/mL), and gene expression was quantified using real-time quantitative reverse transcription polymerase chain reaction. All studied genes showed significant variation in gene expression among different concentrations of pulp or lyophilized extract. Overall, the expression of the selected genes decreased in both cell lines following exposure to the pulp or lyophilized extract in a dose-dependent manner for most of the concentrations studied. In summary, our study showed that the compounds in juçara fruit inhibited the expression of cytoprotective genes associated with the antioxidant response and that, although not cytotoxic at the concentrations studied, they could potentially block the activation of the NRF2/KEAP1 pathway.
Collapse
Affiliation(s)
- L A Milholli
- Departamento de Medicina Veterinária, Centro de Ciências Agrárias e Engenharia, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - J Dalbó
- Biotecnologia/Renorbio Programa de Pós-Graduação, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - C V M S Couto
- Biotecnologia/Renorbio Programa de Pós-Graduação, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - M M Oliveira
- Biotecnologia/Renorbio Programa de Pós-Graduação, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - J G Dos Santos
- Biotecnologia/Renorbio Programa de Pós-Graduação, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - G T Peterle
- Biotecnologia/Renorbio Programa de Pós-Graduação, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - A B Archanjo
- Biotecnologia/Renorbio Programa de Pós-Graduação, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - P I Silva
- Departamento de Engenharia de Alimentos, Centro de Ciências Agrárias e Engenharias, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - J N Boeloni
- Departamento de Medicina Veterinária, Centro de Ciências Agrárias e Engenharia, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - F D Nunes
- Departamento de Estomatologia, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brasil
| | - A M Á da Silva
- Biotecnologia/Renorbio Programa de Pós-Graduação, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| | - L O Trivilin
- Departamento de Medicina Veterinária, Centro de Ciências Agrárias e Engenharia, Universidade Federal do Espírito Santo, Alegre, ES, Brasil
| |
Collapse
|
4
|
Röhl C, Batke M, Damm G, Freyberger A, Gebel T, Gundert-Remy U, Hengstler JG, Mangerich A, Matthiessen A, Partosch F, Schupp T, Wollin KM, Foth H. New aspects in deriving health-based guidance values for bromate in swimming pool water. Arch Toxicol 2022; 96:1623-1659. [PMID: 35386057 PMCID: PMC9095538 DOI: 10.1007/s00204-022-03255-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Accepted: 02/17/2022] [Indexed: 11/27/2022]
Abstract
Bromate, classified as a EU CLP 1B carcinogen, is a typical by-product of the disinfection of drinking and swimming pool water. The aim of this study was (a) to provide data on the occurrence of bromate in pool water, (b) to re-evaluate the carcinogenic MOA of bromate in the light of existing data, (c) to assess the possible exposure to bromate via swimming pool water and (d) to inform the derivation of cancer risk-related bromate concentrations in swimming pool water. Measurements from monitoring analysis of 229 samples showed bromate concentrations in seawater pools up to 34 mg/L. A comprehensive non-systematic literature search was done and the quality of the studies on genotoxicity and carcinogenicity was assessed by Klimisch criteria (Klimisch et al., Regul Toxicol Pharmacol 25:1-5, 1997) and SciRAP tool (Beronius et al., J Appl Toxicol, 38:1460-1470, 2018) respectively. Benchmark dose (BMD) modeling was performed using the modeling average mode in BMDS 3.1 and PROAST 66.40, 67 and 69 (human cancer BMDL10; EFSA 2017). For exposure assessment, data from a wide range of sources were evaluated for their reliability. Different target groups (infants/toddlers, children and adults) and exposure scenarios (recreational, sport-active swimmers, top athletes) were considered for oral, inhalation and dermal exposure. Exposure was calculated according to the frequency of swimming events and duration in water. For illustration, cancer risk-related bromate concentrations in pool water were calculated for different target groups, taking into account their exposure using the hBMDL10 and a cancer risk of 1 in 100,000. Convincing evidence was obtained from a multitude of studies that bromate induces oxidative DNA damage and acts as a clastogen in vitro and in vivo. Since statistical modeling of the available genotoxicity data is compatible with both linear as well as non-linear dose-response relationships, bromate should be conservatively considered to be a non-threshold carcinogen. BMD modeling with model averaging for renal cancer studies (Kurokawa et al., J Natl. Cancer Inst, 1983 and 1986a; DeAngelo et al., Toxicol Pathol 26:587-594, 1998) resulted in a median hBMDL10 of 0.65 mg bromate/kg body weight (bw) per day. Evaluation of different age and activity groups revealed that top athletes had the highest exposure, followed by sport-active children, sport-active adults, infants and toddlers, children and adults. The predominant route of exposure was oral (73-98%) by swallowing water, followed by the dermal route (2-27%), while the inhalation route was insignificant (< 0.5%). Accepting the same risk level for all population groups resulted in different guidance values due to the large variation in exposure. For example, for an additional risk of 1 in 100,000, the bromate concentrations would range between 0.011 for top athletes, 0.015 for sport-active children and 2.1 mg/L for adults. In conclusion, the present study shows that health risks due to bromate exposure by swimming pool water cannot be excluded and that large differences in risk exist depending on the individual swimming habits and water concentrations.
Collapse
Affiliation(s)
- C Röhl
- Institute of Toxicology and Pharmacology for Natural Scientists, Christiana Albertina University Kiel, Kiel, Germany.
- Department of Environmental Health Protection, State Agency for social Services (LAsD) Schleswig-Holstein, Neumünster, Germany.
| | - M Batke
- University Emden/Leer, Emden, Germany
| | - G Damm
- Department of Hepatobiliary Surgery and Visceral Transplantation, University Hospital, Leipzig University, Leipzig, Germany
| | - A Freyberger
- Research and Development, Pharmaceuticals, RED-PCD-TOX-P&PC Clinical Pathology, Bayer AG, Wuppertal, Germany
| | - T Gebel
- Federal Institute for Occupational Safety and Health (BAuA), Dortmund, Germany
| | - U Gundert-Remy
- Institute for Clinical Pharmacology and Toxicology, Universitätsmedizin Berlin, Charité Berlin, Germany
| | - J G Hengstler
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), TU Dortmund University, Dortmund, Germany
| | - A Mangerich
- Molecular Toxicology, Department of Biology, University of Konstanz, Konstanz, Germany
| | - A Matthiessen
- Central Unit for Environmental Hygiene, University Hospital Schleswig-Holstein (UKSH), Kiel, Germany
| | - F Partosch
- Department of Toxicology, Fraunhofer-Institute for Toxicology and Experimental Medicine (ITEM), Hannover, Germany
| | - T Schupp
- Department of Chemical Engineering, University of Applied Science Muenster, Steinfurt, Germany
| | - K M Wollin
- Formerly Public Health Agency of Lower Saxony, Hannover, Germany
| | - H Foth
- Institute of Environmental Toxicology, University of Halle, Halle/Saale, Germany
| |
Collapse
|
5
|
Schreiner TG, Popescu BO. Impact of Caffeine on Alzheimer’s Disease Pathogenesis—Protective or Risk Factor? Life (Basel) 2022; 12:life12030330. [PMID: 35330081 PMCID: PMC8952218 DOI: 10.3390/life12030330] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 12/12/2022] Open
Abstract
Alzheimer’s disease (AD), the most common dementia worldwide, remains without an effective treatment to this day despite intensive research conducted during the last decades. In this context, researchers have turned their attention towards the prevention of this pathology, focusing on early detection and better control of the most important risk factors, concomitantly with trying to find potentially protective factors that may delay the onset of AD. From the multitude of factors studied, coffee (especially its main component, caffeine) is a current interesting research topic, taking into consideration the contradictory results of recent years’ studies. On the one hand, much of the evidence from fundamental research suggests the potentially protective trait of caffeine in AD, while other data mainly from human studies lean toward no correlation or even suggesting that caffeine is a veritable risk factor for dementia. Given the methodological heterogeneity of the studies, this review aims to bring new evidence regarding this topic and to try to clearly establish a correlation between the two entities. Thus, in the first part, the authors make a clear distinction between the effects of coffee and the effects of caffeine in AD, presenting a rich basis of clinical trials on both animal models and the human subject. Subsequently, the main pathophysiological mechanisms that would explain the action of caffeine in the etiopathogenesis of AD are reviewed. Finally, the role of computational models is presented, having beneficial impact on both better understanding of the disease mechanism and the development of new therapeutic approaches for AD prevention.
Collapse
Affiliation(s)
- Thomas Gabriel Schreiner
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania;
- Department of Neurology, University of Medicine and Pharmacy “Gr. T. Popa”, 700115 Iasi, Romania
- Department of Electrical Measurements and Materials, Faculty of Electrical Engineering and Information Technology, Gheorghe Asachi Technical University of Iasi, 21-23 Professor Dimitrie Mangeron Blvd., 700050 Iasi, Romania
- Correspondence:
| | - Bogdan Ovidiu Popescu
- Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania;
- Neurology Department, Colentina Clinical Hospital, 020125 Bucharest, Romania
- Laboratory of Cell Biology, Neurosciences and Experimental Myology, ‘Victor Babes’ National Institute of Pathology, 050096 Bucharest, Romania
| |
Collapse
|
6
|
Jiang J, Dong C, Zhai L, Lou J, Jin J, Cheng S, Chen Z, Guo X, Lin D, Ding J, Gao W. Paeoniflorin Suppresses TBHP-Induced Oxidative Stress and Apoptosis in Human Umbilical Vein Endothelial Cells via the Nrf2/HO-1 Signaling Pathway and Improves Skin Flap Survival. Front Pharmacol 2021; 12:735530. [PMID: 34803685 PMCID: PMC8600365 DOI: 10.3389/fphar.2021.735530] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 09/29/2021] [Indexed: 12/21/2022] Open
Abstract
Random-pattern skin flap is a vital technique frequently applied in reconstruction surgeries for its convenience and effectiveness in solving skin defects. However, ischemic necrosis, especially in the distal areas of the flap, still needs extra attention after surgery. Earlier evidence has suggested that paeoniflorin (PF) could stimulate angiogenesis and suppress ischemic cardiovascular disease. However, few studies have focused on the role of PF in flap survival. In this study, we have demonstrated that the human umbilical vein endothelial cells (HUVECs) treated with PF can alleviate tert-butyl hydroperoxide (TBHP)-stimulated cellular dysfunction and apoptosis. To better evaluate, HUVECs' physiology, cell tube formation, migration, and adhesion were assessed. Mechanistically, PF protects HUVECs against apoptosis via stimulating the nuclear factor (erythroid-derived 2)-like 2 (Nrf2)/heme oxygenase 1 (HO-1) pathway. PF also downregulates mitochondrial ROS production to reduce excessive intracellular ROS production induced by TBHP and restore TBHP-induced mitochondrial depolarization. As a result, silencing Nrf2 partially abolishes the protective effect of PF exposure on HUVECs. In in vivo experiments, the oral administration of PF was shown to have enhanced the vascularization of regenerated tissues and promote flap survival. However, the PF-mediated protection was partially lost after co-treatment with ML385, a selective Nrf2 inhibitor, suggesting that PF is a crucial modulator regulating the Nrf2/HO-1 signaling pathway. In summary, our data have provided a new insight into PF as a potential therapy for enhancing random-pattern flap viability.
Collapse
Affiliation(s)
- Jingtao Jiang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China.,The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Chengji Dong
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China.,The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Liang Zhai
- Department of Medical Cosmetology, The Second Affiliated Hospital of Xi'an Medical College, Xi'an, China
| | - Junsheng Lou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China.,The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Jie Jin
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China.,The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Sheng Cheng
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China.,The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Zhuliu Chen
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China.,The Second Clinical Medical College of Wenzhou Medical University, Wenzhou, China
| | - Xiaoshan Guo
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
| | - Damu Lin
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
| | - Jian Ding
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
| | - Weiyang Gao
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou, China
| |
Collapse
|
7
|
Kabel AM, Ashour AM, Ali DA, Arab HH. The immunomodulatory effects of topiramate on azoxymethane-induced colon carcinogenesis in rats: The role of the inflammatory cascade, vascular endothelial growth factor, AKT/mTOR/MAP kinase signaling and the apoptotic markers. Int Immunopharmacol 2021; 98:107830. [PMID: 34118646 DOI: 10.1016/j.intimp.2021.107830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 05/08/2021] [Accepted: 05/25/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Colon cancer is a malignant condition that affects the lower gastrointestinal tract and has unfavorable prognosis. Its mechanisms range from enhanced production of reactive oxygen species, inflammatory changes in the colon microenvironment and affection of the apoptotic pathways. Due to the high incidence of resistance of colon cancer to the traditional chemotherapeutic agents, a need for finding safe/effective agents that can attenuate the malignant changes had emerged. OBJECTIVE To investigate the possible immunomodulatory and antitumor effects of topiramate on azoxymethane-induced colon cancer in rats. METHODOLOGY Fifty male Wistar rats were randomized into five equal groups as follows: Control; azoxymethane-induced colon cancer; azoxymethane + methyl cellulose; azoxymethane + topiramate small dose; and azoxymethane + topiramate large dose. The body weight gain, serum carcinoembryonic antigen (CEA), tissue antioxidant status, proinflammatory cytokines, vascular endothelial growth factor (VEGF), Nrf2/HO-1 content, p-AKT, mTOR, p38 MAP kinase, caspase 9, nerve growth factor beta and beclin-1 were measured. Also, parts of the colon had undergone histopathological and immunohistochemical evaluation. KEY FINDINGS Topiramate improved the body weight gain, decreased serum CEA, augmented the antioxidant defenses in the colonic tissues with significant amelioration of the inflammatory changes, decline in tissue VEGF and p-AKT/mTOR/MAP kinase signaling and increased Nrf2/HO-1 content in a dose-dependent manner when compared to rats treated with azoxymethane alone. In addition, topiramate, in a dose-dependent manner, significantly enhanced apoptosis and improved the histopathological picture in comparison to animals treated with azoxymethane alone. CONCLUSION Taking these findings together, topiramate might serve as a new effective adjuvant line of treatment of colon cancer.
Collapse
Affiliation(s)
- Ahmed M Kabel
- Pharmacology Department, Faculty of Medicine, Tanta University, Tanta 31527, Egypt.
| | - Ahmed M Ashour
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al Qura University, P.O. Box 13578, Makkah 21955, Saudi Arabia
| | - Dina A Ali
- Clinical Pathology Department, Faculty of Medicine, Tanta University, Tanta 31527, Egypt
| | - Hany H Arab
- Department of Pharmacology and Toxicology, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| |
Collapse
|
8
|
Quercetin Alleviates Oxidative Damage by Activating Nuclear Factor Erythroid 2-Related Factor 2 Signaling in Porcine Enterocytes. Nutrients 2021; 13:nu13020375. [PMID: 33530513 PMCID: PMC7911945 DOI: 10.3390/nu13020375] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 12/24/2020] [Accepted: 12/29/2020] [Indexed: 12/12/2022] Open
Abstract
Oxidative stress has been implicated in the etiology of multiple gastrointestinal disorders, such as irritable bowel syndrome and inflammatory bowel disease. This study was conducted to evaluate effects of natural product quercetin on diquat-induced oxidative stress in porcine enterocytes and underlying mechanisms. Intestinal porcine epithelial cell line 1 (IPEC-1) cells pretreated with or without quercetin (5 μM, 24 h) were incubated with vehicle or diquat (100 μM) for 6 h. The results showed that diquat treatment induced apoptosis in a caspase-3-dependent manner, as accompanied by elevated reactive oxygen species (ROS) production, increased mitochondrial depolarization, and reduced the abundance of tight junction proteins. These adverse effects of diquat were remarkably abrogated by quercetin administration. Further study indicated that the protective effect of quercetin was associated with elevated protein abundance of nuclear factor erythroid 2-related factor 2 (Nrf2) and increased intracellular glutathione (GSH) content. Interestingly, the beneficial effects of quercetin on diquat-induced oxidative damage were abolished by all-trans-retinoic acid (Atra), a specific inhibitor of Nrf2, indicating a Nrf2-dependent regulation manner. The results show that quercetin attenuates diquat-induced cell injury by promoting protein abundance of Nrf2 and regulating GSH-related redox homeostasis in enterocytes. These findings provide new insights into a function role of quercetin in maintaining intestinal homeostasis.
Collapse
|
9
|
Jin Y, Zhai Z, Jia H, Lai J, Si X, Wu Z. Kaempferol attenuates diquat-induced oxidative damage and apoptosis in intestinal porcine epithelial cells. Food Funct 2021; 12:6889-6899. [PMID: 34338265 DOI: 10.1039/d1fo00402f] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Kaempferol, a flavonol component of plants, is well-known to exhibit multiple bioactivities, such as anti-oxidative and anti-apoptotic effects. However, the underlying mechanisms responsible for the beneficial effects remain elusive. This study was conducted to test the hypothesis that kaempferol attenuated diquat-induced oxidative damage and intestinal barrier dysfunction by ameliorating oxidative damage and apoptosis in intestinal porcine epithelial cells. Compared with the control group, diquat treatment led to enhanced intracellular ROS production, increased mitochondrial depolarization, and apoptosis, which were accompanied by cell cycle arrest at the G1 phase, reduced cell migration, and disrupted intestinal epithelial barrier function. These effects triggered by diquat were reversed by kaempferol. Further study showed that the protective effect of kaempferol was associated with an enhanced mRNA level of genes related to cell cycle progression (cyclin D1, CDK4, and E2F1) and genes implicated in the anti-oxidant system (GSR, GSTA4, and HO-1), up-regulated abundance of tight junctions (ZO-1, ZO-2, occludin, and claudin-4), as well as enhanced Nrf2, an anti-oxidant transcription factor. In conclusion, we revealed a functional role of kaempferol in the intestinal barrier. Ingestion of kaempferol-rich foods might be a potential strategy to improve the integrity and function of enterocytes.
Collapse
Affiliation(s)
- Yuhang Jin
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing, 100193, China
| | | | | | | | | | | |
Collapse
|
10
|
A review on anti-cancer properties of Quercetin in breast cancer. Life Sci 2020; 248:117463. [DOI: 10.1016/j.lfs.2020.117463] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 02/10/2020] [Accepted: 02/21/2020] [Indexed: 12/19/2022]
|
11
|
Lee YJ, Kim WI, Bae JH, Cho MK, Lee SH, Nam HS, Choi IH, Cho SW. Overexpression of Nrf2 promotes colon cancer progression via ERK and AKT signaling pathways. Ann Surg Treat Res 2020; 98:159-167. [PMID: 32274363 PMCID: PMC7118325 DOI: 10.4174/astr.2020.98.4.159] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 01/29/2020] [Accepted: 02/20/2020] [Indexed: 01/05/2023] Open
Abstract
PURPOSE We investigated the expression of Nrf2 in colorectal cancer and its correlation with clinicopathological characteristics as well as mechanisms and roles of Nrf2 expression including cell signaling pathway, survival, proliferation, and migration. METHODS Nrf2 expression was measured in 12 and 30 different colorectal cancer (CRC) tissues by western blot (WB) and immunohistochemistry (IHC), respectively. SW480 cells were used for cell proliferation and cell migration tests. The correlation between the expression of Nrf2 and clinicopathologic parameters were evaluated using the chi-square or Fisher exact test. Data are expressed as the mean ± standard deviation for 3 independent experiments. P < 0.05 was considered statistically significant. RESULTS Analysis of WB demonstrated that Nrf2 proteins were increased in CRC tissues, and decreased in normal tissues. IHC staining showed that the Nrf2 expression was elevated in CRC tissues, compared to matched normal tissues. When SW480 cells were suppressed with small interfering RNA of Nrf2, cell viability was inhibited, and cell apoptosis was increased. These results were found along with suppression of the phosphorylated form of extracellular signal-regulated kinase 1/2 and AKT. CONCLUSION This study suggests that overexpression of Nrf2 may be related to carcinogenesis and progression of CRC.
Collapse
Affiliation(s)
- Yoon Jin Lee
- Molecular Cancer Research, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - Woo Il Kim
- Molecular Cancer Research, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - Jin Ho Bae
- Molecular Cancer Research, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - Moon Kyun Cho
- Molecular Cancer Research, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - Sang Han Lee
- Molecular Cancer Research, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - Hae Seon Nam
- Molecular Cancer Research, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - In Ho Choi
- Molecular Cancer Research, College of Medicine, Soonchunhyang University, Cheonan, Korea
| | - Sung Woo Cho
- Department of Surgery, Soonchunhyang University Seoul Hospital, Seoul, Korea
| |
Collapse
|
12
|
Aoki Y, Taniguchi Y, Matsumoto M, Matsumoto M, Ohno M, Masumura K, Sasaki S, Tsuzuki T, Yamamoto M, Nohmi T. Oxidative-stress-driven mutagenesis in the small intestine of the gpt delta mouse induced by oral administration of potassium bromate. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2020; 850-851:503136. [PMID: 32247553 DOI: 10.1016/j.mrgentox.2020.503136] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/08/2020] [Accepted: 01/09/2020] [Indexed: 06/11/2023]
Abstract
Tumorigenesis induced by oxidative stress is thought to be initiated by mutagenesis, but via an indirect mechanism. The dose-response curves for agents that act by this route usually show a threshold, for unknown reasons. To gain insight into these phenomena, we have analyzed the dose response for mutagenesis induced by the oral administration of potassium bromate, a typical oxidative-stress-generating agent, to gpt delta mice. The agent was given orally for 90 d to either Nrf2+ or Nrf2-knockout (KO) mice and mutants induced in the small intestine were analyzed. In Nrf2+mice, the mutant frequency was significantly greater than in the vehicle controls at a dose of 0.6 g/L but not at 0.2 g/L, indicating that a practical threshold for mutagenesis lies between these doses. At 0.6 g/L, the frequencies of G-to-T transversions (landmark mutations for oxidative stress) and G-to-A transitions were significantly elevated. In Nrf2-KO mice, too, the total mutant frequency was increased only at 0.6 g/L. G-to-T transversions are likely to have driven tumorigenesis in the small intestine. A site-specific G-to-T transversion at guanine (nucleotide 406) in a 5'-TGAA-3' sequence in gpt, and our primer extension reaction showed that formation of the oxidative DNA base modification 8-oxo-deoxyguanosine (8-oxo-dG) at nucleotide 406 was significantly increased at doses of 0.6 and 2 g/L in the gpt delta mice. In the Apc oncogene, guanine residues in the same or similar sequences (TGAA or AGAA) are highly substituted by thymine (G-to-T transversions) in potassium bromate-induced tumors. We propose that formation of 8-oxo-dG in the T(A)GAA sequence is an initiating event in tumor formation in the small intestine in response to oxidative stress.
Collapse
Affiliation(s)
- Yasunobu Aoki
- National Institute for Environmental Studies, Center for Health and Environmental Risk Research, Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
| | - Yosuke Taniguchi
- Kyushu University, Graduate School of Pharmaceutical Sciences, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Michiyo Matsumoto
- National Institute for Environmental Studies, Center for Health and Environmental Risk Research, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Michi Matsumoto
- National Institute for Environmental Studies, Center for Health and Environmental Risk Research, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Mizuki Ohno
- Kyushu University, Faculty of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Kenichi Masumura
- National Institute of Health Sciences, Division of Genetics and Mutagenesis, Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| | - Shigeki Sasaki
- Kyushu University, Graduate School of Pharmaceutical Sciences, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Teruhisa Tsuzuki
- Kyushu University, Faculty of Medical Sciences, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Masayuki Yamamoto
- Tohoku University, Graduate School of Medicine, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
| | - Takehiko Nohmi
- National Institute of Health Sciences, Division of Genetics and Mutagenesis, Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
| |
Collapse
|
13
|
Molagoda IMN, Lee KT, Choi YH, Kim GY. Anthocyanins from Hibiscus syriacus L. Inhibit Oxidative Stress-Mediated Apoptosis by Activating the Nrf2/HO-1 Signaling Pathway. Antioxidants (Basel) 2020; 9:antiox9010042. [PMID: 31947843 PMCID: PMC7022859 DOI: 10.3390/antiox9010042] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 12/24/2019] [Accepted: 01/01/2020] [Indexed: 12/18/2022] Open
Abstract
Hibiscus syriacus L. is distributed widely throughout Eastern and Southern Asia and considered as the national flower of South Korea. The extraction of several plant parts of H. syriacus L. is currently used as a natural remedy for several diseases, including breast and lung cancer, microbial infection, and chronic inflammation. However, the effect of the anthocyanin extract of H. syriacus L. petals (PS) in oxidative stress conditions has not been studied. In this study, we evaluated the cytoprotective effect of PS against H2O2-induced oxidative stress in HaCaT keratinocytes. In this study, we found that PS significantly inhibited H2O2-induced apoptosis of HaCaT keratinocytes. We also revealed that PS mediated-cytoprotective effect was associated with the increased expression of heme oxygenase-1 (HO-1) arising from the activation of nuclear factor erythroid 2-related factor-2 (Nrf2). PS also decreased H2O2-induced excessive intracellular ROS generation and restored H2O2-induced mitochondrial depolarization through the downregulation of mitochondrial ROS production. Furthermore, H2O2-induced Bax and caspase-3 expression was markedly abolished in the presence of PS. The inhibition of HO-1 by zinc protoporphyrin significantly attenuated the cytoprotective effect of PS in H2O2-treated HaCaT keratinocytes along with ROS generation, indicating that HO-1 crucially affects PS-mediated cytoprotective properties. Collectively, our results suggested that, under H2O2-mediated oxidative stress conditions, PS sustained a normal level of mitochondrial membrane potential and ROS generation in HaCaT keratinocytes by activating the Nrf2/HO-1 axis, exerting cytoprotective effects against oxidative stress.
Collapse
Affiliation(s)
| | - Kyoung Tae Lee
- Forest Biomaterials Research Center, National Institute of Forest Science, Jinju 52817, Korea;
| | - Yung Hyun Choi
- Department of Biochemistry, College of Oriental Medicine, Dong-Eui University, Busan 47227, Korea;
| | - Gi-Young Kim
- Department of Marine Life Sciences, Jeju National University, Jeju 63243, Korea;
- Correspondence:
| |
Collapse
|
14
|
Pompili S, Sferra R, Gaudio E, Viscido A, Frieri G, Vetuschi A, Latella G. Can Nrf2 Modulate the Development of Intestinal Fibrosis and Cancer in Inflammatory Bowel Disease? Int J Mol Sci 2019; 20:E4061. [PMID: 31434263 PMCID: PMC6720292 DOI: 10.3390/ijms20164061] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/08/2019] [Accepted: 08/12/2019] [Indexed: 12/15/2022] Open
Abstract
One of the main mechanisms carried out by the cells to counteract several forms of stress is the activation of the nuclear factor erythroid 2-related factor (Nrf2) signaling. Nrf2 signaling controls the expression of many genes through the binding of a specific cis-acting element known as the antioxidant response element (ARE). Activation of Nrf2/ARE signaling can mitigate several pathologic mechanisms associated with an autoimmune response, digestive and metabolic disorders, as well as respiratory, cardiovascular, and neurodegenerative diseases. Indeed, several studies have demonstrated that Nrf2 pathway plays a key role in inflammation and in cancer development in many organs, including the intestine. Nrf2 appears to be involved in inflammatory bowel disease (IBD), an immune-mediated chronic and disabling disease, with a high risk of developing intestinal fibrotic strictures and cancer. Currently, drugs able to increase cytoprotective Nrf2 function are in clinical trials or already being used in clinical practice to reduce the progression of some degenerative conditions. The role of Nrf2 in cancer development and progression is controversial, and drugs able to inhibit abnormal levels of Nrf2 are also under investigation. The goal of this review is to analyze and discuss Nrf2-dependent signals in the initiation and progression of intestinal fibrosis and cancers occurring in IBD.
Collapse
Affiliation(s)
- Simona Pompili
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Roberta Sferra
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Eugenio Gaudio
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, 00185 Rome, Italy
| | - Angelo Viscido
- Department of Life, Health and Environmental Sciences, Gastroenterology, Hepatology and Nutrition Division, University of L'Aquila, 67100 L'Aquila, Italy
| | - Giuseppe Frieri
- Department of Life, Health and Environmental Sciences, Gastroenterology, Hepatology and Nutrition Division, University of L'Aquila, 67100 L'Aquila, Italy
| | - Antonella Vetuschi
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Giovanni Latella
- Department of Life, Health and Environmental Sciences, Gastroenterology, Hepatology and Nutrition Division, University of L'Aquila, 67100 L'Aquila, Italy.
| |
Collapse
|
15
|
Liu P, Wang W, Tang J, Bowater RP, Bao Y. Antioxidant effects of sulforaphane in human HepG2 cells and immortalised hepatocytes. Food Chem Toxicol 2019; 128:129-136. [PMID: 30940595 DOI: 10.1016/j.fct.2019.03.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/20/2019] [Accepted: 03/26/2019] [Indexed: 02/07/2023]
Abstract
Sulforaphane (SFN) has shown anti-cancer effects in cellular and animal studies but its effectiveness has been limited in human studies. Here, the effects of SFN were measured in both human hepatocytes (HHL5) and hepatoma (HepG2) cells. Results showed that SFN inhibited cell viability and induced DNA strand breaks at high doses (≥20 μM). It also activated the nuclear factor (erythroid-derived 2)-like 2 (Nrf2), and increased intracellular glutathione (GSH) levels at 24 h. Pre-treatment with a low dose SFN (≤5 μM) protected against hydrogen peroxide (H2O2)-induced cell damage. High doses of SFN were more toxic towards HHL5 compared to HepG2 cells; the difference is likely due to the disparity in the responses of Nrf2-driven enzymes and -GSH levels between the two cell lines. In addition, HepG2 cells hijacked the cytoprotective effect of SFN over a wider dose range (1.25-20 μM) compared to HHL5. Manipulation of levels of GSH and Nrf2 in HepG2 cells confirmed that both molecules mediate the protective effects of SFN against H2O2. The non-specific nature of SFN in the regulation of cell death and survival could present undesirable risks, i.e. be more toxic to normal cells, and cause chemo-resistance in tumor cells. These issues should be addressed in the context for cancer prevention and treatment before large scale clinical trials are undertaken.
Collapse
Affiliation(s)
- Peng Liu
- Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, Norfolk, United Kingdom
| | - Wei Wang
- Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, Norfolk, United Kingdom
| | - Jonathan Tang
- Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, Norfolk, United Kingdom
| | - Richard P Bowater
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, Norfolk, United Kingdom
| | - Yongping Bao
- Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, Norfolk, United Kingdom.
| |
Collapse
|
16
|
Bekeschus S, Freund E, Wende K, Gandhirajan RK, Schmidt A. Hmox1 Upregulation Is a Mutual Marker in Human Tumor Cells Exposed to Physical Plasma-Derived Oxidants. Antioxidants (Basel) 2018; 7:E151. [PMID: 30373228 PMCID: PMC6262576 DOI: 10.3390/antiox7110151] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/15/2018] [Accepted: 10/25/2018] [Indexed: 02/06/2023] Open
Abstract
Increasing numbers of cancer deaths worldwide demand for new treatment avenues. Cold physical plasma is a partially ionized gas expelling a variety of reactive oxygen and nitrogen species, which can be harnesses therapeutically. Plasmas and plasma-treated liquids have antitumor properties in vitro and in vivo. Yet, global response signatures to plasma treatment have not yet been identified. To this end, we screened eight human cancer cell lines to investigate effects of low-dose, tumor-static plasma-treated medium (PTM) on cellular activity, immune-modulatory properties, and transcriptional levels of 22 redox-related genes. With PTM, a moderate reduction of metabolic activity and modest modulation of chemokine/cytokine pattern and markers of immunogenic cell death was observed. Strikingly, the Nuclear factor (erythroid-derived 2)-like 2 (nrf2) target heme oxygenase 1 (hmox1) was upregulated in all cell lines 4 h post PTM-treatment. nrf2 was not changed, but its baseline expression inversely and significantly correlated with hmox1 expression after exposure to PTM. Besides awarding hmox1 a central role with plasma-derived oxidants, we present a transcriptional redox map of 22 targets and chemokine/cytokine secretion map of 13 targets across eight different human tumor cell lines of four tumor entities at baseline activity that are useful for future studies in this field.
Collapse
Affiliation(s)
- Sander Bekeschus
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany.
| | - Eric Freund
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany.
| | - Kristian Wende
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany.
| | - Rajesh Kumar Gandhirajan
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany.
| | - Anke Schmidt
- ZIK plasmatis, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany.
| |
Collapse
|
17
|
Tsuchiya T, Kijima A, Ishii Y, Takasu S, Yokoo Y, Nishikawa A, Yanai T, Umemura T. Role of oxidative stress in the chemical structure-related genotoxicity of nitrofurantoin in Nrf2-deficient gpt delta mice. J Toxicol Pathol 2018; 31:169-178. [PMID: 30093786 PMCID: PMC6077154 DOI: 10.1293/tox.2018-0014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 04/26/2018] [Indexed: 01/14/2023] Open
Abstract
Despite its antimicrobial activity, nitrofurantoin (NFT) is a renal carcinogen in rats. Oxidative stress induced by reduction of the nitro group of NFT may contribute to its genotoxicity. This is supported by our recent results indicating that the structure of the nitrofuran plays a key role in NFT-induced genotoxicity, and oxidative DNA damage is involved in renal carcinogenesis. Nuclear factor erythroid 2-related factor 2 (NRF2) regulates cellular responses to oxidative stress. To clarify the role of oxidative stress in the chemical structure-related genotoxic mechanism of NFT, we performed reporter gene mutation assays for NFT and 5-nitro-2-furaldehyde (NFA) using Nrf2-proficient and Nrf2-deficient gpt delta mice. NFT administration for 13 weeks resulted in a significant increase in 8-hydroxydeoxyguanosine (8-OHdG; a marker of oxidative stress) and gpt mutant frequency only in the kidneys of Nrf2-/- mice. The mutation spectrum, characterized by increased substitutions at guanine bases, suggested that oxidative stress is involved in NFT-induced genotoxicity. However, NFA did not increase the mutation frequency in the kidneys, despite the increased 8-OHdG in NFA-treated Nrf2-/- mice. Thus, it is unlikely that oxidative stress is involved in the genotoxic mechanism of NFA. These results imply that nitro reduction plays a key role in the genotoxicity of NFT, but the lack of a role of oxidative stress in the genotoxicity of NFA indicates a potential role of side chain interactions in oxidative stress caused by nitro reduction. These findings provide a basis for the development of safe nitrofurans.
Collapse
Affiliation(s)
- Takuma Tsuchiya
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
- Pathogenetic Veterinary Science, United Graduate School of
Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu-shi, Gifu 501-1193, Japan
| | - Aki Kijima
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Yuji Ishii
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Shinji Takasu
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Yuh Yokoo
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Akiyoshi Nishikawa
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Tokuma Yanai
- Pathogenetic Veterinary Science, United Graduate School of
Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu-shi, Gifu 501-1193, Japan
| | - Takashi Umemura
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
- Department of Animal Nursing, Yamazaki Gakuen University,
4-7-2 Minamiosawa, Hachioji-shi, Tokyo 192-0364, Japan
| |
Collapse
|
18
|
Tsuchiya T, Kijima A, Ishii Y, Takasu S, Yokoo Y, Nishikawa A, Yanai T, Umemura T. Mechanisms of oxidative stress-induced in vivo mutagenicity by potassium bromate and nitrofurantoin. J Toxicol Pathol 2018; 31:179-188. [PMID: 30093787 PMCID: PMC6077160 DOI: 10.1293/tox.2018-0024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 04/26/2018] [Indexed: 11/19/2022] Open
Abstract
Oxidative stress is well known as a key factor of chemical carcinogenesis. However, the actual role of oxidative stress in carcinogenesis, such as oxidative stress-related in vivo mutagenicity, remains unclear. It has been reported that 8-hydroxydeoxyguanosine (8-OHdG), an oxidized DNA lesion, might contribute to chemical carcinogenesis. Potassium bromate (KBrO3) and nitrofurantoin (NFT) are known as renal carcinogens in rats. Our previous studies showed an increase in mutant frequencies accompanied by an increased level of 8-OHdG in the kidneys of rodents following KBrO3 or NFT exposure. Furthermore, KBrO3 and NFT induced different types of gene mutations. Thus, in the present study, we performed reporter gene mutation assays and 8-OHdG measurements following KBrO3 or NFT exposure using Nrf2-proficient and Nrf2-deficient mice to clarify the relationship between KBrO3- or NFT-induced oxidative stress and subsequent genotoxicity. Administration of 1,500 ppm of KBrO3 in drinking water resulted in an increase in deletion mutations accompanied by an increase in 8-OHdG level, and administration of 2,500 ppm of NFT in diet induced an increase in guanine base substitution mutations without elevation of the 8-OHdG level in Nrf2-deficient mice. These results demonstrated that the formation of 8-OHdG, which resulted from the oxidizing potential of KBrO3, was directly involved in the increase in deletion mutations, although factors related to oxidative stress other than 8-OHdG might be crucial for NFT-induced guanine base substitution mutations. The present study provides new insight into oxidative stress-related in vivo mutagenicity.
Collapse
Affiliation(s)
- Takuma Tsuchiya
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
- Pathogenetic Veterinary Science, United Graduate School of
Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu-shi, Gifu 501-1193, Japan
| | - Aki Kijima
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Yuji Ishii
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Shinji Takasu
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Yuh Yokoo
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Akiyoshi Nishikawa
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
| | - Tokuma Yanai
- Pathogenetic Veterinary Science, United Graduate School of
Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu-shi, Gifu 501-1193, Japan
| | - Takashi Umemura
- Division of Pathology, National Institute of Health
Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
- Department of Animal Nursing, Yamazaki Gakuen University,
4-7-2 Minamiosawa, Hachioji-shi, Tokyo 192-0364, Japan
| |
Collapse
|
19
|
Pibiri M, Leoni VP, Atzori L. Heme oxygenase-1 inhibitor tin-protoporphyrin improves liver regeneration after partial hepatectomy. Life Sci 2018; 204:9-14. [PMID: 29738777 DOI: 10.1016/j.lfs.2018.05.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 04/24/2018] [Accepted: 05/04/2018] [Indexed: 12/22/2022]
Abstract
AIMS This study investigates the effects of the heme oxygenase-1 (HO-1) inhibitor tin protoporphyrin IX (SnPP), on rat liver regeneration following 2/3 partial hepatectomy (PH) in order to clarify the controversial role of HO-1 in the regulation of cellular growth. MAIN METHODS Male Wistar rats received a subcutaneous injection of either SnPP (10 μmoles/kg body weight) or saline 12 h before PH and 0, 12 and 24 h after surgery. Rats were killed from 0.5 to 36 h after PH. Bromodeoxyuridine (BrdU) incorporation was used to analyze cell proliferation. Immunohistochemistry, Western blot analysis and quantitative Real Time-PCR were used to assess molecular and cellular changes after PH. KEY FINDINGS Data obtained have shown that administration of SnPP caused an increased entry of hepatocytes into S phase after PH, as demonstrated by labeling (L.I.) and mitotic (M.I.) indexes. Furthermore, enhanced cell cycle entry in PH-animals pre-treated with SnPP was associated with an earlier activation of IL-6 and transcription factors involved in liver regeneration, such as phospho-JNK and phospho-STAT3. SIGNIFICANCE Summarizing, data here reported demonstrate that inhibition of HO-1 enhances rat liver regeneration after PH which is associated to a very rapid increase in the levels of inflammatory mediators such as IL-6, phopsho-JNK and phospho-STAT3, suggesting that HO-1 could act as a negative modulator of liver regeneration. Knowledge about the mechanisms of liver regeneration can be applied to clinical problems caused by delayed liver growth, and HO-1 repression may be a mechanism by which cells can faster proliferate in response to tissue damage.
Collapse
Affiliation(s)
- Monica Pibiri
- Department of Biomedical Sciences, Oncology and Molecular Pathology Unit, University of Cagliari, Via Porcell 4, 09124 Cagliari, Italy
| | - Vera Piera Leoni
- Department of Biomedical Sciences, Oncology and Molecular Pathology Unit, University of Cagliari, Via Porcell 4, 09124 Cagliari, Italy
| | - Luigi Atzori
- Department of Biomedical Sciences, Oncology and Molecular Pathology Unit, University of Cagliari, Via Porcell 4, 09124 Cagliari, Italy.
| |
Collapse
|
20
|
Russo I, Carrizzo A, Bochicchio S, Piazza O, Lamberti G, Barba AA, Vecchione C, Zeppa P, Iovino P, Bucci C, Santonicola A, Ciacci C. siRNA Delivery for Control of Cyclin D1 and E2F1 Expression in Crohn's Disease. Transl Med UniSa 2018; 17:25-33. [PMID: 30083520 PMCID: PMC6067069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Evidence in inflammatory bowel diseases (IBD) supports a connection between inflammation and cancer due to the alteration of the cell cycle with loss of control at the G1/S checkpoint. In this study, we analyze the expression and modulation of CyD1 and E2F1 in colon explants from Crohn's disease (CD) patients. We used ex vivo culture of colon explants from 4 CD patients and 2 healthy controls, stimulated with lipopolysaccharide from Escherichia Coli (EC-LPS). Commercial siRNAs for CyD1 and E2F1 inhibition were encapsulated in Invivofectamine® and in purposely produced nanoliposomal vectors to silencing CyD1 and E2F1 expression. Western blot analysis was used to investigate the effect of siRNA on CyD1, E2F1 and cyclooxygenase 2 (COX-2) expression. In CD patients colon explants, CyD1 and E2F1 increased after the inflammatory stimulus but siRNA silencing attenuated their expression and controlled the COX-2 expression too. These data represent a prelimiary exploration of in vitro siRNA use.
Collapse
Affiliation(s)
- Ilaria Russo
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Albino Carrizzo
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Sabrina Bochicchio
- Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II, 132, Fisciano (SA) – ITALY,Department of Pharmacy, University of Salerno, via Giovanni Paolo II, 132, Fisciano (SA) - ITALY
| | - Ornella Piazza
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Gaetano Lamberti
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II, 132, Fisciano (SA) - ITALY
| | - Anna Angela Barba
- Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II, 132, Fisciano (SA) – ITALY
| | - Carmine Vecchione
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Pio Zeppa
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Paola Iovino
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Cristina Bucci
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Antonella Santonicola
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Carolina Ciacci
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| |
Collapse
|
21
|
Russo I, Carrizzo A, Bochicchio S, Piazza O, Lamberti G, Barba AA, Vecchione C, Zeppa P, Iovino P, Bucci C, Santonicola A, Ciacci C. siRNA Delivery for Control of Cyclin D1 and E2F1 Expression in Crohn's Disease. Transl Med UniSa 2018; 17:22-30. [PMID: 30050877 PMCID: PMC6056255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Evidence in inflammatory bowel diseases (IBD) supports a connection between inflammation and cancer due to the alteration of the cell cycle with loss of control at the G1/S checkpoint. In this study, we analyze the expression and modulation of CyD1 and E2F1 in colon explants from Crohn's disease (CD) patients. We used ex vivo culture of colon explants from 4 CD patients and 2 healthy controls, stimulated with lipopolysaccharide from Escherichia Coli (EC-LPS). Commercial siRNAs for CyD1 and E2F1 inhibition were encapsulated in Invivofectamine® and in purposely produced nanoliposomal vectors to silencing CyD1 and E2F1 expression. Western blot analysis was used to investigate the effect of siRNA on CyD1, E2F1 and cyclooxygenase 2 (COX-2) expression. In CD patients colon explants, CyD1 and E2F1 increased after the inflammatory stimulus but siRNA silencing attenuated their expression and controlled the COX-2 expression too. These data represent a prelimiary exploration of in vitro siRNA use.
Collapse
Affiliation(s)
- Ilaria Russo
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Albino Carrizzo
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Sabrina Bochicchio
- Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II, 132, Fisciano (SA) – ITALY,Department of Pharmacy, University of Salerno, via Giovanni Paolo II, 132, Fisciano (SA) - ITALY
| | - Ornella Piazza
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Gaetano Lamberti
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II, 132, Fisciano (SA) - ITALY
| | - Anna Angela Barba
- Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II, 132, Fisciano (SA) – ITALY
| | - Carmine Vecchione
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Pio Zeppa
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Paola Iovino
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Cristina Bucci
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Antonella Santonicola
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| | - Carolina Ciacci
- Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, 84081, Baronissi (SA), Italy, IRCCS Neuromed, Pozzilli (IS), 86077, Italy
| |
Collapse
|
22
|
Jeddi F, Soozangar N, Sadeghi MR, Somi MH, Samadi N. Contradictory roles of Nrf2/Keap1 signaling pathway in cancer prevention/promotion and chemoresistance. DNA Repair (Amst) 2017; 54:13-21. [DOI: 10.1016/j.dnarep.2017.03.008] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 03/25/2017] [Accepted: 03/26/2017] [Indexed: 12/17/2022]
|
23
|
Gonzalez-Donquiles C, Alonso-Molero J, Fernandez-Villa T, Vilorio-Marqués L, Molina AJ, Martín V. The NRF2 transcription factor plays a dual role in colorectal cancer: A systematic review. PLoS One 2017; 12:e0177549. [PMID: 28542357 PMCID: PMC5436741 DOI: 10.1371/journal.pone.0177549] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 04/28/2017] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Colorectal cancer is one of the most common cancers worldwide, and is influenced by the interplay of various factors, including a very strong genetic component. For instance, incorrect mitochondrial biogenesis is correlated with increased risk of developing colorectal cancer. Thus, it is important to understand the consequences of changes in both the expression and the correct function of the transcription factors that regulate mitochondrial biogenesis, namely NRF2. OBJECTIVES The main objective of this paper is to characterise the relationship between NRF2 and colorectal cancer by compiling data from an exhaustive literature search. METHODS Information was obtained by defining specific search terms and searching in several databases. After a strict selection procedure, data were tabulated and the relationships between articles were assessed by measuring heterogeneity and by constructing conceptual maps. RESULTS AND DISCUSSION We found a general consensus in the literature that the presence of oxidizing agents as well as the inhibition of the NRF2 repressor Keap1 maintain NRF2 expression at basal levels. This predominantly exerts a cytoprotective effect on cells and decreases risk of colorectal cancer. However, if NRF2 is inhibited, protection against external agents disappears and risk of colorectal cancer increases. Interestingly, colorectal cancer risk is also increased when NRF2 becomes overexpressed. In this case, the increased risk arises from NRF2-induced inflammation and resistance to chemotherapy. CONCLUSION The proper basal function of NRF2 and Keap1 are essential for preventing oncogenic processes in the colon. Consequently, any disruption to the expression of these genes can promote the genesis and progression of colon cancer.
Collapse
Affiliation(s)
- C. Gonzalez-Donquiles
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Gene-Environment and Health Research Group, University of Leon, León, Spain
| | - J. Alonso-Molero
- Gene-Environment and Health Research Group, University of Leon, León, Spain
| | - T. Fernandez-Villa
- Gene-Environment and Health Research Group, University of Leon, León, Spain
| | - L. Vilorio-Marqués
- Gene-Environment and Health Research Group, University of Leon, León, Spain
| | - A. J. Molina
- Gene-Environment and Health Research Group, University of Leon, León, Spain
| | - V. Martín
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Gene-Environment and Health Research Group, University of Leon, León, Spain
| |
Collapse
|
24
|
Yokoo Y, Kijima A, Ishii Y, Takasu S, Tsuchiya T, Umemura T. Effects of Nrf2 silencing on oxidative stress-associated intestinal carcinogenesis in mice. Cancer Med 2016; 5:1228-38. [PMID: 26899729 PMCID: PMC4924381 DOI: 10.1002/cam4.672] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 01/23/2016] [Accepted: 01/25/2016] [Indexed: 12/22/2022] Open
Abstract
To assess the risk of colorectal cancer in humans with inactivation of NRF2, Nrf2‐proficient (Nrf2+/+) and ‐deficient (Nrf2−/−) mice were exposed to potassium bromate (KBrO3) at concentrations of 750 or 1500 ppm for 52 weeks. Neoplastic proliferative lesions were observed in the small intestine and exhibited accumulations of β‐catenin and cyclin D1. The lesions had characteristics similar to those in experimental models of human hereditary colorectal cancer. An additional 13‐week study was performed to examine the role of Nrf2 in the effects of oxidative stress. Significant increase in combined incidences of preneoplastic and neoplastic lesions in Nrf2−/− mice administered high‐dose KBrO3. In the short‐term study, although 8‐hydroxydeoxyguanosine (8‐OHdG) levels in the epithelial DNA of Nrf2−/− mice at the high dose were significantly lower than those of the corresponding Nrf2+/+ mice, the difference was very small. mRNA levels of Nrf2‐regulated genes were increased in Nrf2+/+ mice. Overexpression of cyclooxygenase 2 (COX2) and increased numbers of proliferating cell nuclear antigen (PCNA)‐positive cells in the jejunal crypts were observed in Nrf2−/− mice administered high‐dose KBrO3. Overall, these data suggested that individuals having single‐nucleotide polymorphisms in NRF2 may have a risk of colorectal cancer to some extent.
Collapse
Affiliation(s)
- Yuh Yokoo
- Division of Pathology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - Aki Kijima
- Division of Pathology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - Yuji Ishii
- Division of Pathology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - Shinji Takasu
- Division of Pathology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - Takuma Tsuchiya
- Division of Pathology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| | - Takashi Umemura
- Division of Pathology, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo, 158-8501, Japan
| |
Collapse
|