51
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Matsushita K, Okuda T, Mori S, Konno M, Eguchi H, Asai A, Koseki J, Iwagami Y, Yamada D, Akita H, Asaoka T, Noda T, Kawamoto K, Gotoh K, Kobayashi S, Kasahara Y, Morihiro K, Satoh T, Doki Y, Mori M, Ishii H, Obika S. A Hydrogen Peroxide Activatable Gemcitabine Prodrug for the Selective Treatment of Pancreatic Ductal Adenocarcinoma. ChemMedChem 2019; 14:1384-1391. [DOI: 10.1002/cmdc.201900324] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Indexed: 01/03/2023]
Affiliation(s)
- Katsunori Matsushita
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Takumi Okuda
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
| | - Shohei Mori
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
- Department of Medical Data ScienceGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Ayumu Asai
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
- Department of Medical Data ScienceGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Jun Koseki
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
- Department of Medical Data ScienceGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Yoshifumi Iwagami
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Daisaku Yamada
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
- Present address: Department of Digestive SurgeryOsaka International Cancer Institute 3-1-69 Otemae, Chuo-ku Osaka Osaka 541-8567 Japan
| | - Hirofumi Akita
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Tadafumi Asaoka
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Takehiro Noda
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Koichi Kawamoto
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
- Present address: Kinki Regional Bureau of Health and WelfareMinistry of Health, Labour and Welfare 4-1-76 Nonin Bashi, Chuo-ku Osaka Osaka 540-0008 Japan
| | - Kunihito Gotoh
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Shogo Kobayashi
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Yuuya Kasahara
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki Osaka 567-0085 Japan
| | - Kunihiko Morihiro
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki Osaka 567-0085 Japan
- Present address: Department of Chemistry and BiotechnologyGraduate School of EngineeringThe University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Taroh Satoh
- Department of Frontier Science for Cancer and ChemotherapyGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Yuichiro Doki
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
| | - Masaki Mori
- Department of Gastroenterological SurgeryGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan)
- Present address: Department of Surgery and ScienceGraduate School of Medical SciencesKyushu University 3-1-1 Maidashi, Higashi-ku Fukuoka 812-8582 Japan
| | - Hideshi Ishii
- Department of Medical Data ScienceGraduate School of MedicineOsaka University 2-2 Yamadaoka Suita Osaka 565-0871 Japan
| | - Satoshi Obika
- Graduate School of Pharmaceutical SciencesOsaka University 1-6 Yamadaoka Suita Osaka 565-0871 Japan
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) 7-6-8 Saito-Asagi Ibaraki Osaka 567-0085 Japan
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52
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Sarmiento-Salinas FL, Delgado-Magallón A, Montes-Alvarado JB, Ramírez-Ramírez D, Flores-Alonso JC, Cortés-Hernández P, Reyes-Leyva J, Herrera-Camacho I, Anaya-Ruiz M, Pelayo R, Millán-Pérez-Peña L, Maycotte P. Breast Cancer Subtypes Present a Differential Production of Reactive Oxygen Species (ROS) and Susceptibility to Antioxidant Treatment. Front Oncol 2019; 9:480. [PMID: 31231612 PMCID: PMC6568240 DOI: 10.3389/fonc.2019.00480] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 05/21/2019] [Indexed: 12/20/2022] Open
Abstract
Due to their crucial role in cell metabolism and homeostasis, alterations in mitochondrial biology and function have been related to the progression of diverse diseases including cancer. One of the consequences associated to mitochondrial dysfunction is the production of reactive oxygen species (ROS). ROS are known to have a controversial role during cancer initiation and progression and although several studies have tried to manipulate intracellular ROS levels using antioxidants or pro-oxidation conditions, it is not yet clear how to target oxidation for cancer therapy. In this study, we found differences in mitochondrial morphology in breast cancer cells when compared to a non-tumorigenic cell line and differences in mitochondrial function among breast cancer subtypes when exploring gene-expression data from the TCGA tumor dataset. Interestingly, we found increased ROS levels in triple negative breast cancer (TNBC) cell lines and a dependency on ROS for survival since antioxidant treatment induced cell death in TNBC cells but not in an estrogen receptor positive (ER+) cell line. Moreover, we identified the mitochondria as the main source of ROS in TNBC cell lines. Our results indicate a potential use for ROS as a target for therapy in the TNBC subtype which currently has the worst prognosis among all breast cancers and remains as the only breast cancer subtype which lacks a targeted therapy.
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Affiliation(s)
- Fabiola Lilí Sarmiento-Salinas
- Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Puebla, Mexico.,Posgrado en Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Alam Delgado-Magallón
- Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Puebla, Mexico.,Departamento de Bioquímica, Instituto Tecnológico de Acapulco, Acapulco de Juárez, Mexico
| | | | - Dalia Ramírez-Ramírez
- Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Puebla, Mexico
| | | | - Paulina Cortés-Hernández
- Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Puebla, Mexico
| | - Julio Reyes-Leyva
- Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Puebla, Mexico
| | - Irma Herrera-Camacho
- Centro de Química, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Maricruz Anaya-Ruiz
- Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Puebla, Mexico
| | - Rosana Pelayo
- Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Puebla, Mexico
| | | | - Paola Maycotte
- CONACYT-Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Puebla, Mexico
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53
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Wang W, Tang H, Wu Y, Zhang Y, Li Z. Highly electrocatalytic biosensor based on Hemin@AuNPs/reduced graphene oxide/chitosan nanohybrids for non-enzymatic ultrasensitive detection of hydrogen peroxide in living cells. Biosens Bioelectron 2019; 132:217-223. [DOI: 10.1016/j.bios.2019.02.039] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/02/2019] [Accepted: 02/15/2019] [Indexed: 01/20/2023]
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54
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Engel M, Gee YS, Cross D, Maccarone A, Heng B, Hulme A, Smith G, Guillemin GJ, Stringer BW, Hyland CJT, Ooi L. Novel dual-action prodrug triggers apoptosis in glioblastoma cells by releasing a glutathione quencher and lysine-specific histone demethylase 1A inhibitor. J Neurochem 2019; 149:535-550. [PMID: 30592774 PMCID: PMC6590141 DOI: 10.1111/jnc.14655] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 11/04/2018] [Accepted: 12/19/2018] [Indexed: 02/04/2023]
Abstract
Targeting epigenetic mechanisms has shown promise against several cancers but has so far been unsuccessful against glioblastoma (GBM). Altered histone 3 lysine 4 methylation and increased lysine‐specific histone demethylase 1A (LSD1) expression in GBM tumours nonetheless suggest that epigenetic mechanisms are involved in GBM. We engineered a dual‐action prodrug, which is activated by the high hydrogen peroxide levels associated with GBM cells. This quinone methide phenylaminecyclopropane prodrug releases the LSD1 inhibitor 2‐phenylcyclopropylamine with the glutathione scavenger para‐quinone methide to trigger apoptosis in GBM cells. Quinone methide phenylaminocyclopropane impaired GBM cell behaviours in two‐dimensional and three‐dimensional assays, and triggered cell apoptosis in several primary and immortal GBM cell cultures. These results support our double‐hit hypothesis of potentially targeting LSD1 and quenching glutathione, in order to impair and kill GBM cells but not healthy astrocytes. Our data suggest this strategy is effective at selectively targeting GBM and potentially other types of cancers. Open science badges
This article has received a badge for *Open Materials* because it provided all relevant information to reproduce the study in the manuscript. The complete Open Science Disclosure form for this article can be found at the end of the article. More information about the Open Practices badges can be found at https://cos.io/our-services/open-science-badges/. ![]()
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Affiliation(s)
- Martin Engel
- Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia.,School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia
| | - Yi Sing Gee
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia
| | - Dale Cross
- Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia.,School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia
| | - Alan Maccarone
- Mass Spectrometry User Resource and Research Facility, School of Chemistry, University of Wollongong, Wollongong, New South Wales, Australia
| | - Benjamin Heng
- Faculty of Medicine and Health Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Amy Hulme
- Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia.,School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia
| | - Grady Smith
- Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia.,School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia
| | - Gilles J Guillemin
- Faculty of Medicine and Health Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Brett W Stringer
- QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Christopher J T Hyland
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia
| | - Lezanne Ooi
- Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia.,School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia
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55
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Bellamri M, Turesky RJ. Dietary Carcinogens and DNA Adducts in Prostate Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1210:29-55. [PMID: 31900903 DOI: 10.1007/978-3-030-32656-2_2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Prostate cancer (PC) is the most commonly diagnosed non-cutaneous cancer and the second leading cause of cancer-related to death in men. The major risk factors for PC are age, family history, and African American ethnicity. Epidemiological studies have reported large geographical variations in PC incidence and mortality, and thus lifestyle and dietary factors influence PC risk. High fat diet, dairy products, alcohol and red meats, are considered as risk factors for PC. This book chapter provides a comprehensive, literature-based review on dietary factors and their molecular mechanisms of prostate carcinogenesis. A large portion of our knowledge is based on epidemiological studies where dietary factors such as cancer promoting agents, including high-fat, dairy products, alcohol, and cancer-initiating genotoxicants formed in cooked meats have been evaluated for PC risk. However, the precise mechanisms in the etiology of PC development remain uncertain. Additional animal and human cell-based studies are required to further our understandings of risk factors involved in PC etiology. Specific biomarkers of chemical exposures and DNA damage in the prostate can provide evidence of cancer-causing agents in the prostate. Collectively, these studies can improve public health research, nutritional education and chemoprevention strategies.
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Affiliation(s)
- Medjda Bellamri
- Department of Medicinal Chemistry, Cancer and Cardiovascular Research Building, University of Minnesota, Minneapolis, MN, USA.,Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Robert J Turesky
- Department of Medicinal Chemistry, Cancer and Cardiovascular Research Building, University of Minnesota, Minneapolis, MN, USA. .,Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA.
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56
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Ma B, Wang S, Liu F, Zhang S, Duan J, Li Z, Kong Y, Sang Y, Liu H, Bu W, Li L. Self-Assembled Copper–Amino Acid Nanoparticles for in Situ Glutathione “AND” H2O2 Sequentially Triggered Chemodynamic Therapy. J Am Chem Soc 2018; 141:849-857. [DOI: 10.1021/jacs.8b08714] [Citation(s) in RCA: 559] [Impact Index Per Article: 93.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Baojin Ma
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Shu Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Feng Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Shan Zhang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Jiazhi Duan
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Zhao Li
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Ying Kong
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Yuanhua Sang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Hong Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, P. R. China
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan 250022, P. R. China
| | - Wenbo Bu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
| | - Linlin Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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57
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Jiang Q, Liu Y, Guo R, Yao X, Sung S, Pang Z, Yang W. Erythrocyte-cancer hybrid membrane-camouflaged melanin nanoparticles for enhancing photothermal therapy efficacy in tumors. Biomaterials 2018; 192:292-308. [PMID: 30465973 DOI: 10.1016/j.biomaterials.2018.11.021] [Citation(s) in RCA: 241] [Impact Index Per Article: 40.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 10/22/2018] [Accepted: 11/13/2018] [Indexed: 12/19/2022]
Abstract
Cell membrane coating has emerged as an intriguing biomimetic strategy to endow nanomaterials with functions and properties inherent to source cells for various biomedical applications. Hybrid membrane of different types of cells could be coated onto nanoparticle surface to achieve additional functions. Herein, we fused red blood cell (RBC) membrane together with MCF-7 cell membrane and fabricated an erythrocyte-cancer (RBC-M) hybrid membrane-camouflaged melanin nanoparticle (Melanin@RBC-M) platform for enhancing therapeutic efficacy of photothermal therapy (PTT). The fused RBC-M hybrid membrane vesicles retained both RBC and MCF-7 cell membrane proteins and the resultant Melanin@RBC-M exhibited prolonged blood circulation and homotypic targeting to source MCF-7 cells simultaneously. Interestingly, increasing MCF-7 membrane components in RBC-M significantly enhanced the homotypic targeting function of Melanin@RBC-M while increasing RBC membrane components in RBC-M effectively reduced the cellular uptake of Melanin@RBC-M by macrophages and improved their circulation time in the blood. After intravenous injection into MCF-7 tumor-bearing athymic nude mice, Melanin@RBC-M with 1:1 membrane protein weight ratio of RBC to MCF-7 exhibited significantly higher tumor accumulation and better PTT efficacy compared with other Melanin@RBC-M with different membrane protein weight ratios as well as pristine melanin nanoparticles, due to the optimal balance between prolonged blood circulation and homotypic targeting. In addition, in vitro photoacoustic results revealed that Melanin@RBC-M had a photoacoustic signal enhancement with the increase of nanoparticle size (64 → 148 nm) and the photoacoustic amplitudes increased linearly with nanoparticle concentration at the excitation wavelength ranged from 680 nm to 800 nm, which could be used for quantification of Melanin@RBC-M in vivo. Looking forward, coating hybrid membrane onto nanoparticles could add flexibility and controllability in enhancing nanoparticles functionality and offer new opportunities for biomedical applications.
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Affiliation(s)
- Qin Jiang
- State Key Laboratory of Molecular Engineering of Polymers & Department of Macromolecular Science, Fudan University, Shanghai 200433, PR China
| | - Yao Liu
- Key Laboratory of Smart Drug Delivery, Ministry of Education & PLA, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Ranran Guo
- State Key Laboratory of Molecular Engineering of Polymers & Department of Macromolecular Science, Fudan University, Shanghai 200433, PR China
| | - Xianxian Yao
- State Key Laboratory of Molecular Engineering of Polymers & Department of Macromolecular Science, Fudan University, Shanghai 200433, PR China
| | - Seunghyun Sung
- Department of Chemistry, Hankuk University of Foreign Studies, Seoul Campus 107, Imun-ro, Dongdaemun-gu, Seoul 02450, Republic of Korea
| | - Zhiqing Pang
- Key Laboratory of Smart Drug Delivery, Ministry of Education & PLA, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, PR China.
| | - Wuli Yang
- State Key Laboratory of Molecular Engineering of Polymers & Department of Macromolecular Science, Fudan University, Shanghai 200433, PR China.
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58
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Chaiswing L, St. Clair WH, St. Clair DK. Redox Paradox: A Novel Approach to Therapeutics-Resistant Cancer. Antioxid Redox Signal 2018; 29:1237-1272. [PMID: 29325444 PMCID: PMC6157438 DOI: 10.1089/ars.2017.7485] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 01/05/2018] [Indexed: 02/06/2023]
Abstract
SIGNIFICANCE Cancer cells that are resistant to radiation and chemotherapy are a major problem limiting the success of cancer therapy. Aggressive cancer cells depend on elevated intracellular levels of reactive oxygen species (ROS) to proliferate, self-renew, and metastasize. As a result, these aggressive cancers maintain high basal levels of ROS compared with normal cells. The prominence of the redox state in cancer cells led us to consider whether increasing the redox state to the condition of oxidative stress could be used as a successful adjuvant therapy for aggressive cancers. Recent Advances: Past attempts using antioxidant compounds to inhibit ROS levels in cancers as redox-based therapy have met with very limited success. However, recent clinical trials using pro-oxidant compounds reveal noteworthy results, which could have a significant impact on the development of strategies for redox-based therapies. CRITICAL ISSUES The major objective of this review is to discuss the role of the redox state in aggressive cancers and how to utilize the shift in redox state to improve cancer therapy. We also discuss the paradox of redox state parameters; that is, hydrogen peroxide (H2O2) as the driver molecule for cancer progression as well as a target for cancer treatment. FUTURE DIRECTIONS Based on the biological significance of the redox state, we postulate that this system could potentially be used to create a new avenue for targeted therapy, including the potential to incorporate personalized redox therapy for cancer treatment.
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Affiliation(s)
- Luksana Chaiswing
- Department of Toxicology and Cancer Biology, University of Kentucky-Lexington, Lexington, Kentucky
| | - William H. St. Clair
- Department of Radiation Medicine, University of Kentucky-Lexington, Lexington, Kentucky
| | - Daret K. St. Clair
- Department of Toxicology and Cancer Biology, University of Kentucky-Lexington, Lexington, Kentucky
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59
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Disease-directed design of biodegradable polymers: Reactive oxygen species and pH-responsive micellar nanoparticles for anticancer drug delivery. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2018; 14:2666-2677. [DOI: 10.1016/j.nano.2018.06.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 06/15/2018] [Accepted: 06/29/2018] [Indexed: 11/16/2022]
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60
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Chen W, Fan H, Balakrishnan K, Wang Y, Sun H, Fan Y, Gandhi V, Arnold LA, Peng X. Discovery and Optimization of Novel Hydrogen Peroxide Activated Aromatic Nitrogen Mustard Derivatives as Highly Potent Anticancer Agents. J Med Chem 2018; 61:9132-9145. [PMID: 30247905 DOI: 10.1021/acs.jmedchem.8b00559] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We describe several new aromatic nitrogen mustards with various aromatic substituents and boronic esters that can be activated with H2O2 to efficiently cross-link DNA. In vitro studies demonstrated the anticancer potential of these compounds at lower concentrations than those of other clinically used chemotherapeutics, such as melphalan and chlorambucil. In particular, compound 10, bearing an amino acid ester chain, is selectively cytotoxic toward breast cancer and leukemia cells that have inherently high levels of reactive oxygen species. Importantly, 10 was 10-14-fold more efficacious than melphalan and chlorambucil for triple-negative breast-cancer (TNBC) cells. Similarly, 10 is more toxic toward primary chronic-lymphocytic-leukemia cells than either chlorambucil or the lead compound, 9. The introduction of an amino acid side chain improved the solubility and permeability of 10. Furthermore, 10 inhibited the growth of TNBC tumors in xenografted mice without obvious signs of general toxicity, making this compound an ideal drug candidate for clinical development.
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Affiliation(s)
- Wenbing Chen
- Department of Chemistry and Biochemistry and the Milwaukee Institute for Drug Discovery , University of Wisconsin, Milwaukee , 3210 North Cramer Street , Milwaukee , Wisconsin 53211 , United States
| | - Heli Fan
- Department of Chemistry and Biochemistry and the Milwaukee Institute for Drug Discovery , University of Wisconsin, Milwaukee , 3210 North Cramer Street , Milwaukee , Wisconsin 53211 , United States
| | - Kumudha Balakrishnan
- Department of Experimental Therapeutics , MD Anderson Cancer Center , Houston , Texas 77030 , United States
| | | | | | | | - Varsha Gandhi
- Department of Experimental Therapeutics , MD Anderson Cancer Center , Houston , Texas 77030 , United States
| | - Leggy A Arnold
- Department of Chemistry and Biochemistry and the Milwaukee Institute for Drug Discovery , University of Wisconsin, Milwaukee , 3210 North Cramer Street , Milwaukee , Wisconsin 53211 , United States
| | - Xiaohua Peng
- Department of Chemistry and Biochemistry and the Milwaukee Institute for Drug Discovery , University of Wisconsin, Milwaukee , 3210 North Cramer Street , Milwaukee , Wisconsin 53211 , United States
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61
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Ma B, Liu F, Zhang S, Duan J, Kong Y, Li Z, Tang D, Wang W, Ge S, Tang W, Liu H. Two-photon fluorescent polydopamine nanodots for CAR-T cell function verification and tumor cell/tissue detection. J Mater Chem B 2018; 6:6459-6467. [PMID: 32254653 DOI: 10.1039/c8tb01930d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Chimeric antigen receptor T-Cell (CAR-T) immunotherapy has been regarded as one of the most promising methods for cancer therapy. How to verify CAR-T cell function and efficiency is very significant for clinical applications. Meanwhile, the identification of tumor cells/tissues is very important for tumor diagnosis and operation. In this study, biocompatible and mass-produced polydopamine (PDA) nanodots have been prepared by a facile method. Oxidized polydopamine (OPDA) can be synthesized by the reaction between PDA and hydrogen peroxide at atmospheric pressure and temperature, and it possesses both one-photon and two-photon fluorescence properties. OPDA nanodots can image living cells for long time periods without mitosis and proliferation inhibition. After ingestion of OPDA nanodots, Raji cells can be used to verify CAR-T cell lethality and efficiency by visualization through fluorescence. The fluorescence intensity change originating from the conversion of PDA into OPDA can function as a signal to identify the tumor and normal cells/tissues because of the different concentration of ROS in tumor cells (high) and normal cells (low). Therefore, the facile synthesis of mass-produced novel organic nanodots with two-photon fluorescence properties will have wide applications in long time living cell imaging without mitosis and proliferation inhibition, CAR-T cell function verification and tumor cell/tissue detection.
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Affiliation(s)
- Baojin Ma
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, China.
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62
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Bhagat SD, Singh U, Mishra RK, Srivastava A. An Endogenous Reactive Oxygen Species (ROS)-Activated Histone Deacetylase Inhibitor Prodrug for Cancer Chemotherapy. ChemMedChem 2018; 13:2073-2079. [DOI: 10.1002/cmdc.201800367] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/05/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Somnath D. Bhagat
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road Bhopal Madhya Pradesh 462066 India
| | - Usha Singh
- Department of Biological Sciences; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road Bhopal Madhya Pradesh 462066 India
| | - Ram Kumar Mishra
- Department of Biological Sciences; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road Bhopal Madhya Pradesh 462066 India
| | - Aasheesh Srivastava
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road Bhopal Madhya Pradesh 462066 India
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63
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DUOX1 Silencing in Mammary Cell Alters the Response to Genotoxic Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:3570526. [PMID: 29849884 PMCID: PMC5933011 DOI: 10.1155/2018/3570526] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 03/15/2018] [Indexed: 11/23/2022]
Abstract
DUOX1 is an H2O2-generating enzyme related to a wide range of biological features, such as hormone synthesis, host defense, cellular proliferation, and fertilization. DUOX1 is frequently downregulated in lung and liver cancers, suggesting a tumor suppressor role for this enzyme. Here, we show that DUOX1 expression is decreased in breast cancer cell lines and also in breast cancers when compared to the nontumor counterpart. In order to address the role of DUOX1 in breast cells, we stably knocked down the expression of DUOX1 in nontumor mammary cells (MCF12A) with shRNA. This led to higher cell proliferation rates and decreased migration and adhesion properties, which are typical features for transformed cells. After genotoxic stress induced by doxorubicin, DUOX1-silenced cells showed reduced IL-6 and IL-8 secretion and increased apoptosis levels. Furthermore, the cell proliferation rate was higher in DUOX1-silenced cells after doxorubicin medication in comparison to control cells. In conclusion, we demonstrate here that DUOX1 is silenced in breast cancer, which seems to be involved in breast carcinogenesis.
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64
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Ravikumar G, Bagheri M, Saini DK, Chakrapani H. A small molecule for theraNOstic targeting of cancer cells. Chem Commun (Camb) 2018; 53:13352-13355. [PMID: 29192700 DOI: 10.1039/c7cc08526e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Thera/NO - a small molecule that is activated by hydrogen peroxide to generate nitric oxide (NO) and a fluorescence signal is reported. Using cancer and primary cells, we show that Thera/NO preferentially releases NO in cancer cells, which can trigger DNA damage and cell death in them. The coupled fluorescence signal facilitated tracking the NO release in living cells without collateral consumption of NO.
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Affiliation(s)
- Govindan Ravikumar
- Department of Chemistry, Indian Institute of Science Education and Research, Pune, India.
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65
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Zheng S, Guo S, Zhong Q, Zhang C, Liu J, Yang L, Zhang Q, Wang G. Biocompatible Boron-Containing Prodrugs of Belinostat for the Potential Treatment of Solid Tumors. ACS Med Chem Lett 2018; 9:149-154. [PMID: 29456804 DOI: 10.1021/acsmedchemlett.7b00504] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 01/08/2018] [Indexed: 01/09/2023] Open
Abstract
Despite promising therapeutic utilities for treatment of hematological malignancies, histone deacetylase inhibitor (HDACi) drugs have not proven as effective in the treatment of solid tumors. To expand the clinical indications of HDACi drugs, we developed novel boron-containing prodrugs of belinostat (2), one of which efficiently releases active 2 through a cascade of reactions in cell culture and demonstrates activities comparable to 2 against a panel of cancer cell lines. Importantly, prodrug 7 is more efficacious than belinostat in vivo, not only inhibiting the growth of tumor but also reducing tumor volumes in an MCF-7 xenograft tumor model owing to its superior biocompatibility, which suggests its clinical potential in the treatment of solid tumors.
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Affiliation(s)
| | | | | | | | | | - Lin Yang
- Chongqing
Medical and Pharmaceutical College, No. 82, Middle Rd, University Town, Chongqing 401331, China
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66
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Deep G, Panigrahi GK. Hypoxia-Induced Signaling Promotes Prostate Cancer Progression: Exosomes Role as Messenger of Hypoxic Response in Tumor Microenvironment. Crit Rev Oncog 2018; 20:419-34. [PMID: 27279239 DOI: 10.1615/critrevoncog.v20.i5-6.130] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Prostate cancer (PCA) is the leading malignancy in men and the second leading cause of cancer-related deaths. Hypoxia (low O2 condition) is considered an early event in prostate carcinogenesis associated with an aggressive phenotype. In fact, clinically, hypoxia and hypoxia-related biomarkers are associated with treatment failure and disease progression. Hypoxia-inducible factor 1 (HIF-1) is the key factor that is activated under hypoxia, and mediates adaptation of cells to hypoxic conditions through regulating the expression of genes associated with angiogenesis, epithelial-to-mesenchymal transition (EMT), metastasis, survival, proliferation, metabolism, sternness, hormone-refractory progression, and therapeutic resistance. Besides HIF-1, several other signaling pathways including PI3K/Akt/mTOR, NADPH oxidase (NOX), Wnt/b-catenin, and Hedgehog are activated in cancer cells under hypoxic conditions, and also contribute in hypoxia-induced biological effects in HIF-1-dependent and -independent manners. Hypoxic cancer cells cause extensive changes in the tumor microenvironment both local and distant, and recent studies have provided ample evidence supporting the crucial role of nanosized vesicles "exosomes" in mediating hypoxia-induced tumor microenvironment remodeling. Exosomes' role has been reported in hypoxia-induced angiogenesis, sternness, activation of cancer-associated fibroblasts (CAFs), and EMT. Together, existing literature suggests that hypoxia plays a predominant role in PCA growth and progression, and PCA could be effectively prevented and treated via targeting hypoxia/hypoxia-related signaling pathways.
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Affiliation(s)
- Gagan Deep
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO; University of Colorado Cancer Center, University of Colorado Denver, Aurora, CO
| | - Gati K Panigrahi
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO
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67
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Thioredoxin-1 protects against androgen receptor-induced redox vulnerability in castration-resistant prostate cancer. Nat Commun 2017; 8:1204. [PMID: 29089489 PMCID: PMC5663934 DOI: 10.1038/s41467-017-01269-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 09/04/2017] [Indexed: 01/18/2023] Open
Abstract
Androgen deprivation (AD) therapy failure leads to terminal and incurable castration-resistant prostate cancer (CRPC). We show that the redox-protective protein thioredoxin-1 (TRX1) increases with prostate cancer progression and in androgen-deprived CRPC cells, suggesting that CRPC possesses an enhanced dependency on TRX1. TRX1 inhibition via shRNA or a phase I-approved inhibitor, PX-12 (untested in prostate cancer), impedes the growth of CRPC cells to a greater extent than their androgen-dependent counterparts. TRX1 inhibition elevates reactive oxygen species (ROS), p53 levels and cell death in androgen-deprived CRPC cells. Unexpectedly, TRX1 inhibition also elevates androgen receptor (AR) levels under AD, and AR depletion mitigates both TRX1 inhibition-mediated ROS production and cell death, suggesting that AD-resistant AR expression in CRPC induces redox vulnerability. In vivo TRX1 inhibition via shRNA or PX-12 reverses the castration-resistant phenotype of CRPC cells, significantly inhibiting tumor formation under systemic AD. Thus, TRX1 is an actionable CRPC therapeutic target through its protection against AR-induced redox stress.
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68
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Miyata Y, Matsuo T, Sagara Y, Ohba K, Ohyama K, Sakai H. A Mini-Review of Reactive Oxygen Species in Urological Cancer: Correlation with NADPH Oxidases, Angiogenesis, and Apoptosis. Int J Mol Sci 2017; 18:ijms18102214. [PMID: 29065504 PMCID: PMC5666894 DOI: 10.3390/ijms18102214] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 10/17/2017] [Accepted: 10/17/2017] [Indexed: 12/24/2022] Open
Abstract
Oxidative stress refers to elevated reactive oxygen species (ROS) levels, and NADPH oxidases (NOXs), which are one of the most important sources of ROS. Oxidative stress plays important roles in the etiologies, pathological mechanisms, and treatment strategies of vascular diseases. Additionally, oxidative stress affects mechanisms of carcinogenesis, tumor growth, and prognosis in malignancies. Nearly all solid tumors show stimulation of neo-vascularity, termed angiogenesis, which is closely associated with malignant aggressiveness. Thus, cancers can be seen as a type of vascular disease. Oxidative stress-induced functions are regulated by complex endogenous mechanisms and exogenous factors, such as medication and diet. Although understanding these regulatory mechanisms is important for improving the prognosis of urothelial cancer, it is not sufficient, because there are controversial and conflicting opinions. Therefore, we believe that this knowledge is essential to discuss observations and treatment strategies in urothelial cancer. In this review, we describe the relationships between members of the NOX family and tumorigenesis, tumor growth, and pathological mechanisms in urological cancers including prostate cancer, renal cell carcinoma, and urothelial cancer. In addition, we introduce natural compounds and chemical agents that are associated with ROS-induced angiogenesis or apoptosis.
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Affiliation(s)
- Yasuyoshi Miyata
- Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Tomohiro Matsuo
- Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Yuji Sagara
- Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Kojiro Ohba
- Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Kaname Ohyama
- Department of Pharmaceutical Science, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
| | - Hideki Sakai
- Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
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69
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Red blood cell membrane-camouflaged melanin nanoparticles for enhanced photothermal therapy. Biomaterials 2017; 143:29-45. [DOI: 10.1016/j.biomaterials.2017.07.027] [Citation(s) in RCA: 206] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/19/2017] [Accepted: 07/20/2017] [Indexed: 11/20/2022]
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70
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The Strong Cell-based Hydrogen Peroxide Generation Triggered by Cold Atmospheric Plasma. Sci Rep 2017; 7:10831. [PMID: 28883477 PMCID: PMC5589829 DOI: 10.1038/s41598-017-11480-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 08/24/2017] [Indexed: 12/21/2022] Open
Abstract
Hydrogen peroxide (H2O2) is an important signaling molecule in cancer cells. However, the significant secretion of H2O2 by cancer cells have been rarely observed. Cold atmospheric plasma (CAP) is a near room temperature ionized gas composed of neutral particles, charged particles, reactive species, and electrons. Here, we first demonstrated that breast cancer cells and pancreatic adenocarcinoma cells generated micromolar level H2O2 during just 1 min of direct CAP treatment on these cells. The cell-based H2O2 generation is affected by the medium volume, the cell confluence, as well as the discharge voltage. The application of cold atmospheric plasma (CAP) in cancer treatment has been intensively investigated over the past decade. Several cellular responses to CAP treatment have been observed including the consumption of the CAP-originated reactive species, the rise of intracellular reactive oxygen species, the damage on DNA and mitochondria, as well as the activation of apoptotic events. This is a new previously unknown cellular response to CAP, which provides a new prospective to understand the interaction between CAP and cells in vitro and in vivo. The short-lived reactive species in CAP may activate cells in vivo to generate long-lived reactive species such as H2O2, which may trigger immune attack on tumorous tissues via the H2O2-mediated lymphocyte activation.
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71
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Raza MH, Siraj S, Arshad A, Waheed U, Aldakheel F, Alduraywish S, Arshad M. ROS-modulated therapeutic approaches in cancer treatment. J Cancer Res Clin Oncol 2017. [PMID: 28647857 DOI: 10.1007/s00432-017-2464-9] [Citation(s) in RCA: 177] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE Reactive oxygen species (ROS) are produced in cancer cells as a result of increased metabolic rate, dysfunction of mitochondria, elevated cell signaling, expression of oncogenes and increased peroxisome activities. Certain level of ROS is required by cancer cells, above or below which lead to cytotoxicity in cancer cells. This biochemical aspect can be exploited to develop novel therapeutic agents to preferentially and selectively target cancer cells. METHODS We searched various electronic databases including PubMed, Web of Science, and Google Scholar for peer-reviewed english-language articles. Selected articles ranging from research papers, clinical studies, and review articles on the ROS production in living systems, its role in cancer development and cancer treatment, and the role of microbiota in ROS-dependent cancer therapy were analyzed. RESULTS This review highlights oxidative stress in tumors, underlying mechanisms of different relationships of ROS and cancer cells, different ROS-mediated therapeutic strategies and the emerging role of microbiota in cancer therapy. CONCLUSION Cancer cells exhibit increased ROS stress and disturbed redox homeostasis which lead to ROS adaptations. ROS-dependent anticancer therapies including ROS scavenging anticancer therapy and ROS boosting anticancer therapy have shown promising results in vitro as well as in vivo. In addition, response to cancer therapy is modulated by the human microbiota which plays a critical role in systemic body functions.
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Affiliation(s)
- Muhammad Hassan Raza
- Department of Bioinformatics and Biotechnology, International Islamic University, Sector H-10, Islamabad, 44000, Pakistan.
| | - Sami Siraj
- Institute of Basic Medical Sciences, Khyber Medical University (KMU), Peshawar, 25000, Pakistan
| | - Abida Arshad
- Department of Biology, PMAS-Arid Agriculture University, Rawalpindi, 46000, Pakistan
| | - Usman Waheed
- Department of Pathology and Blood Bank, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, 44000, Pakistan
| | - Fahad Aldakheel
- Department of Clinical Laboratory Medicine, College of Applied Medical Sciences, King Saud University, Riyadh, 11564, Saudi Arabia
| | - Shatha Alduraywish
- Department of Family and Community Medicine, College of Medicine, King Saud University, Riyadh, 11564, Saudi Arabia
| | - Muhammad Arshad
- Department of Bioinformatics and Biotechnology, International Islamic University, Sector H-10, Islamabad, 44000, Pakistan
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72
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Moloney JN, Cotter TG. ROS signalling in the biology of cancer. Semin Cell Dev Biol 2017; 80:50-64. [PMID: 28587975 DOI: 10.1016/j.semcdb.2017.05.023] [Citation(s) in RCA: 1117] [Impact Index Per Article: 159.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/17/2017] [Accepted: 05/29/2017] [Indexed: 12/19/2022]
Abstract
Increased reactive oxygen species (ROS) production has been detected in various cancers and has been shown to have several roles, for example, they can activate pro-tumourigenic signalling, enhance cell survival and proliferation, and drive DNA damage and genetic instability. Counterintuitively ROS can also promote anti-tumourigenic signalling, initiating oxidative stress-induced tumour cell death. Tumour cells express elevated levels of antioxidant proteins to detoxify elevated ROS levels, establish a redox balance, while maintaining pro-tumourigenic signalling and resistance to apoptosis. Tumour cells have an altered redox balance to that of their normal counterparts and this identifies ROS manipulation as a potential target for cancer therapies. This review discusses the generation and sources of ROS within tumour cells, the regulation of ROS by antioxidant defence systems, as well as the effect of elevated ROS production on their signalling targets in cancer. It also provides an insight into how pro- and anti-tumourigenic ROS signalling pathways could be manipulated in the treatment of cancer.
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Affiliation(s)
- Jennifer N Moloney
- Tumour Biology Laboratory, School of Biochemistry and Cell Biology, Bioscience Research Institute, University College Cork, Cork, Ireland
| | - Thomas G Cotter
- Tumour Biology Laboratory, School of Biochemistry and Cell Biology, Bioscience Research Institute, University College Cork, Cork, Ireland.
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73
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Hydrogen peroxide activated quinone methide precursors with enhanced DNA cross-linking capability and cytotoxicity towards cancer cells. Eur J Med Chem 2017; 133:197-207. [PMID: 28388522 DOI: 10.1016/j.ejmech.2017.03.041] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 02/24/2017] [Accepted: 03/22/2017] [Indexed: 11/21/2022]
Abstract
Quinone methide (QM) formation induced by endogenously generated H2O2 is attractive for biological and biomedical applications. To overcome current limitations due to low biological activity of H2O2-activated QM precursors, we are introducing herein several new arylboronates with electron donating substituents at different positions of benzene ring and/or different neutral leaving groups. The reaction rate of the arylboronate esters with H2O2 and subsequent bisquinone methides formation and DNA cross-linking was accelerated with the application of Br as a leaving group instead of acetoxy groups. Additionally, a donating group placed meta to the nascent exo-methylene group of the quinone methide greatly improves H2O2-induced DNA interstrand cross-link formation as well as enhances the cellular activity. Multiple donating groups decrease the stability and DNA cross-linking capability, which lead to low cellular activity. A cell-based screen demonstrated that compounds 2a and 5a with a OMe or OH group dramatically inhibited the growth of various tissue-derived cancer cells while normal cells were less affected. Induction of H2AX phosphorylation by these compounds in CLL lymphocytes provide evidence for a correlation between cell death and DNA damage. The compounds presented herein showed potent anticancer activities and selectivity, which represent a novel scaffold for anticancer drug development.
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74
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Yasen W, Dong R, Zhou L, Wu J, Cao C, Aini A, Zhu X. Synthesis of a Cationic Supramolecular Block Copolymer with Covalent and Noncovalent Polymer Blocks for Gene Delivery. ACS APPLIED MATERIALS & INTERFACES 2017; 9:9006-9014. [PMID: 28233991 DOI: 10.1021/acsami.6b15919] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The design and fabrication of safe and highly efficient nonviral vectors is the key scientific issue for the achievement of clinical gene therapy. Supramolecular cationic polymers have unique structures and specific functions compared to covalent cationic polymers, such as low cytotoxicity, excellent biodegradability, and smart environmental responsiveness, thereby showing great application prospect for gene therapy. However, supramolecular gene vectors are facile to be degraded under physiological conditions, leading to a significant reduction of gene transfection efficiency. In order to achieve highly efficient gene expression, it is necessary for supramolecular gene vectors being provided with appropriate biostability to overcome various cell obstacles. To this end, a novel cationic supramolecular block copolymer composed of a conventional polymer and a noncovalent polymer was constructed through robust β-cyclodextrin/ferrocene host-guest recognition. The resultant supramolecular block copolymer perfectly combines the advantages of both conventional polymers and supramolecular polymers ranging from structures to functions. This supramolecular copolymer not only has the ability to effectively condense pDNA for enhanced cell uptake, but also releases pDNA inside cancer cells triggered by H2O2, which can be utilized as a prospective nonviral delivery vehicle for gene delivery. The block polymer exhibited low cytotoxicity, good biostability, excellent biodegradability, and intelligent responsiveness, ascribing to the dynamic/reversible nature of noncovalent linkages. In vitro studies further illustrated that the supramolecular block polymer exhibited greatly improved gene transfection efficiency in cancer cells. This work offers an alternative platform for the exploitation of smart nonviral vehicles for specific cancer gene therapy in the future.
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Affiliation(s)
- Wumaier Yasen
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, China
| | - Ruijiao Dong
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, China
| | - Linzhu Zhou
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, China
| | - Jieli Wu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, China
| | - Chengxi Cao
- School of Life Science and Biotechnology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Aliya Aini
- School of Foreign Languages, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, China
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75
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Zhang Y, Duan J, Cai L, Ma D, Xue W. Supramolecular Aggregate as a High-Efficiency Gene Carrier Mediated with Optimized Assembly Structure. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29343-29355. [PMID: 27739303 DOI: 10.1021/acsami.6b11390] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
For cancer gene therapy, a safe and high-efficient gene carrier is a must. To resolve the contradiction between gene transfection efficiency and cytotoxicity, many polymers with complex topological structures have been synthesized, although their synthesis processes and structure control are difficult as well as the high molecular weight also bring high cytotoxicity. We proposed an alternative strategy that uses supramolecular inclusion to construct the aggregate from the small molecules for gene delivery, and to further explore the relationship between the topological assembly structure and their ability to deliver gene. Herein, PEI-1.8k-conjugating β-CD through 6-hydroxyl (PEI-6-CD) and 2-hydroxyl (PEI-2-CD) have been synthesized respectively and then assembled with diferrocene (Fc)-ended polyethylene glycol (PEG-Fc). The obtained aggregates were then used to deliver MMP-9 shRNA plasmid for MCF-7 cancer therapy. It was found that the higher gene transfection efficiency can be obtained by selecting PEI-2-CD as the host and tuning the host/guest molar ratios. With the rational modulation of supramolecular architectures, the aggregate played the functions similar to macromolecules which exhibit higher transfection efficiency than PEI-25k, but show much lower cytotoxicity because of the nature of small/low molecules. In vitro and in vivo assays confirmed that the aggregate could deliver MMP-9 shRNA plasmid effectively into MCF-7 cells and then downregulate MMP-9 expression, which induced the significant MCF-7 cell apoptosis, as well inhibit MCF-7 tumor growth with low toxicity. The supramolecular aggregates maybe become a promising carrier for cancer gene therapy and also provided an alternative strategy for designing new gene carriers.
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Affiliation(s)
- Yi Zhang
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University , Guangzhou 510632, China
| | - Junkun Duan
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University , Guangzhou 510632, China
| | - Lingguang Cai
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University , Guangzhou 510632, China
| | - Dong Ma
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University , Guangzhou 510632, China
| | - Wei Xue
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University , Guangzhou 510632, China
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Conte A, Kisslinger A, Procaccini C, Paladino S, Oliviero O, de Amicis F, Faicchia D, Fasano D, Caputo M, Matarese G, Pierantoni GM, Tramontano D. Convergent Effects of Resveratrol and PYK2 on Prostate Cells. Int J Mol Sci 2016; 17:ijms17091542. [PMID: 27649143 PMCID: PMC5037816 DOI: 10.3390/ijms17091542] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 08/31/2016] [Accepted: 09/07/2016] [Indexed: 01/03/2023] Open
Abstract
Resveratrol, a dietary polyphenol, is under consideration as chemopreventive and chemotherapeutic agent for several diseases, including cancer. However, its mechanisms of action and its effects on non-tumor cells, fundamental to understand its real efficacy as chemopreventive agent, remain largely unknown. Proline-rich tyrosine kinase 2 (PYK2), a non-receptor tyrosine kinase acting as signaling mediator of different stimuli, behaves as tumor-suppressor in prostate. Since, PYK2 and RSV share several fields of interaction, including oxidative stress, we have investigated their functional relationship in human non-transformed prostate EPN cells and in their tumor-prone counterpart EPN-PKM, expressing a PYK2 dead-kinase mutant. We show that RSV has a strong biological activity in both cell lines, decreasing ROS production, inducing morphological changes and reversible growth arrest, and activating autophagy but not apoptosis. Interestingly, the PYK2 mutant increases basal ROS and autophagy levels, and modulates the intensity of RSV effects. In particular, the anti-oxidant effect of RSV is more potent in EPN than in EPN-PKM, whereas its anti-proliferative and pro-autophagic effects are more significant in EPN-PKM. Consistently, PYK2 depletion by RNAi replicates the effects of the PKM mutant. Taken together, our results reveal that PYK2 and RSV act on common cellular pathways and suggest that RSV effects on prostate cells may depend on mutational-state or expression levels of PYK2 that emerges as a possible mediator of RSV mechanisms of action. Moreover, the observation that resveratrol effects are reversible and not associated to apoptosis in tumor-prone EPN-PKM cells suggests caution for its use in humans.
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Affiliation(s)
- Andrea Conte
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
- Institute of Experimental Oncology and Endocrinology, National Research Council of Italy, 80131 Naples, Italy.
| | - Annamaria Kisslinger
- Institute of Experimental Oncology and Endocrinology, National Research Council of Italy, 80131 Naples, Italy.
| | - Claudio Procaccini
- Institute of Experimental Oncology and Endocrinology, National Research Council of Italy, 80131 Naples, Italy.
| | - Simona Paladino
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
- Centro di Ingegneria Genetica (CEINGE)-Biotecnologie Avanzate, 80131 Naples, Italy.
| | - Olimpia Oliviero
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, 80131 Naples, Italy.
| | - Francesca de Amicis
- Centro Sanitario, University of Calabria, 87036 Rende (CS), Italy.
- Department of Pharmacy, Health Science and Nutrition, University of Calabria, 87036 Rende (CS), Italy.
| | - Deriggio Faicchia
- Department of Medical and Translational Science, University Federico II of Naples, 80131 Naples, Italy.
| | - Dominga Fasano
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
| | - Marilena Caputo
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
| | - Giuseppe Matarese
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
| | - Giovanna Maria Pierantoni
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
| | - Donatella Tramontano
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
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77
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Holzmann C, Kilch T, Kappel S, Dörr K, Jung V, Stöckle M, Bogeski I, Peinelt C. Differential Redox Regulation of Ca²⁺ Signaling and Viability in Normal and Malignant Prostate Cells. Biophys J 2016; 109:1410-9. [PMID: 26445441 DOI: 10.1016/j.bpj.2015.08.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 08/04/2015] [Accepted: 08/06/2015] [Indexed: 12/11/2022] Open
Abstract
In prostate cancer, reactive oxygen species (ROS) are elevated and Ca(2+) signaling is impaired. Thus, several novel therapeutic strategies have been developed to target altered ROS and Ca(2+) signaling pathways in prostate cancer. Here, we investigate alterations of intracellular Ca(2+) and inhibition of cell viability caused by ROS in primary human prostate epithelial cells (hPECs) from healthy tissue and prostate cancer cell lines (LNCaP, DU145, and PC3). In hPECs, LNCaP and DU145 H2O2 induces an initial Ca(2+) increase, which in prostate cancer cells is blocked at high concentrations of H2O2. Upon depletion of intracellular Ca(2+) stores, store-operated Ca(2+) entry (SOCE) is activated. SOCE channels can be formed by hexameric Orai1 channels; however, Orai1 can form heteromultimers with its homolog, Orai3. Since the redox sensor of Orai1 (Cys-195) is absent in Orai3, the Orai1/Orai3 ratio in T cells determines the redox sensitivity of SOCE and cell viability. In prostate cancer cells, SOCE is blocked at lower concentrations of H2O2 compared with hPECs. An analysis of data from hPECs, LNCaP, DU145, and PC3, as well as previously published data from naive and effector TH cells, demonstrates a strong correlation between the Orai1/Orai3 ratio and the SOCE redox sensitivity and cell viability. Therefore, our data support the concept that store-operated Ca(2+) channels in hPECs and prostate cancer cells are heteromeric Orai1/Orai3 channels with an increased Orai1/Orai3 ratio in cells derived from prostate cancer tumors. In addition, ROS-induced alterations in Ca(2+) signaling in prostate cancer cells may contribute to the higher sensitivity of these cells to ROS.
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Affiliation(s)
- Christian Holzmann
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany
| | - Tatiana Kilch
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany; Center of Human and Molecular Biology, Saarland University, Homburg, Germany
| | - Sven Kappel
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany
| | - Kathrin Dörr
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany
| | - Volker Jung
- Clinics of Urology and Pediatric Urology, Saarland University, Homburg, Germany
| | - Michael Stöckle
- Clinics of Urology and Pediatric Urology, Saarland University, Homburg, Germany
| | - Ivan Bogeski
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany
| | - Christine Peinelt
- Biophysics, Center for Integrated Physiology and Molecular Medicine, School of Medicine, Saarland University, Homburg, Germany; Center of Human and Molecular Biology, Saarland University, Homburg, Germany.
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78
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Redox homeostasis of breast cancer lineages contributes to differential cell death response to exogenous hydrogen peroxide. Life Sci 2016; 158:7-13. [DOI: 10.1016/j.lfs.2016.06.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 05/31/2016] [Accepted: 06/16/2016] [Indexed: 02/07/2023]
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79
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Habib SL, Abboud HE. Tuberin regulates reactive oxygen species in renal proximal cells, kidney from rodents, and kidney from patients with tuberous sclerosis complex. Cancer Sci 2016; 107:1092-100. [PMID: 27278252 PMCID: PMC4982584 DOI: 10.1111/cas.12984] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 05/30/2016] [Accepted: 06/07/2016] [Indexed: 12/20/2022] Open
Abstract
Reactive oxygen species (ROS) are an important endogenous source of DNA damage and oxidative stress in all cell types. Deficiency in tuberin resulted in increased oxidative DNA damage in renal cells. In this study, the role of tuberin in the regulating of ROS and NADPH oxidases was investigated. Formation of ROS and activity of NADPH oxidases were significantly higher in mouse embryonic fibroblasts and in primary culture of rat renal proximal tubular epithelial tuberin‐deficient cells compared to wild‐type cells. In addition, expression of NADPH oxidase (Nox)1, Nox2, and Nox4 (Nox isoforms) was higher in mouse embryonic fibroblasts and renal proximal tubular epithelial tuberin‐deficient cells compared to wild‐type cells. Furthermore, activity levels of NADPH oxidases and protein expression of all Nox isoforms were higher in the renal cortex of rat deficient in tuberin. However, treatment of tuberin‐deficient cells with rapamycin showed significant decrease in protein expression of all Nox. Significant increase in protein kinase C βII expression was detected in tuberin‐deficient cells, whereas inhibition of protein kinase C βII by bisindolylmaleimide I resulted in decreased protein expression of all Nox isoforms. In addition, treatment of mice deficient in tuberin with rapamycin resulted in significant decrease in all Nox protein expression. Moreover, protein and mRNA expression of all Nox were highly expressed in tumor kidney tissue of patients with tuberous sclerosis complex compared to control kidney tissue of normal subjects. These data provide the first evidence that tuberin plays a novel role in regulating ROS generation, NADPH oxidase activity, and Nox expression that may potentially be involved in development of kidney tumor in patients with tuberous sclerosis complex.
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Affiliation(s)
- Samy L Habib
- Geriatric Research, Education and Clinical Department, South Texas Veterans Health Care System, San Antonio, Texas, USA.,Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Hanna E Abboud
- Geriatric Research, Education and Clinical Department, South Texas Veterans Health Care System, San Antonio, Texas, USA.,Department of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
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80
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Sanjeewa KKA, Kim EA, Son KT, Jeon YJ. Bioactive properties and potentials cosmeceutical applications of phlorotannins isolated from brown seaweeds: A review. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:100-105. [PMID: 27362368 DOI: 10.1016/j.jphotobiol.2016.06.027] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 06/14/2016] [Accepted: 06/14/2016] [Indexed: 01/05/2023]
Abstract
Currently, natural ingredients are becoming more attractive for the industries such as functional food, nutraceuticals, cosmeceutical and pharmaceutical industries as people starting to believe naturally occurring compounds are safer to humans than artificial compounds. Seaweeds are one of the most interesting organisms found in oceans around the earth, which are carrying great ecological importance and contribute to increase the biodiversity of ecosystems where they were originated and habitat. Within last few decades, discovery of secondary metabolites with biological activities from seaweeds has been significantly increased. Further, the unique secondary metabolites isolated from seaweeds including polysaccharides, carotenoids and polyphenols possess range of bioactive properties that make them potential ingredient for many industrial applications. Among those groups of compounds phlorotannins isolated from brown seaweeds have shown interesting bioactive properties including anti-cancer, anti-inflammation, anti-oxidant, anti-allergic, anti-wrinkling and hair growth promotion properties. Moreover, these properties associated with phlorotannins make them an ideal compounds to use as a functional ingredient in cosmeceutical products. Up to now no report has been reviewed about discuss properties of phlorotannins related to the cosmeceutical application. In the present review primary attention is given to the collect scientific data published about bioactive properties of brown algal phlorotannins related to the cosmeceutical industry.
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Affiliation(s)
- Kalu Kapuge Asanka Sanjeewa
- Laboratory of Marine Bioresource Technology, Department of Marine Life Science, School of Marine Biomedical Sciences, Jeju National University, Jeju 690-756, Republic of Korea
| | - Eun-A Kim
- Laboratory of Marine Bioresource Technology, Department of Marine Life Science, School of Marine Biomedical Sciences, Jeju National University, Jeju 690-756, Republic of Korea
| | - Kwang-Tae Son
- National Institute of Fisheries Science, Food Safety and Processing Research Division 216, Gijang-Haeanro, Gijang-eup, Busan 46083, Republic of Korea.
| | - You-Jin Jeon
- Laboratory of Marine Bioresource Technology, Department of Marine Life Science, School of Marine Biomedical Sciences, Jeju National University, Jeju 690-756, Republic of Korea.
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81
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Graviola inhibits hypoxia-induced NADPH oxidase activity in prostate cancer cells reducing their proliferation and clonogenicity. Sci Rep 2016; 6:23135. [PMID: 26979487 PMCID: PMC4793251 DOI: 10.1038/srep23135] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 02/25/2016] [Indexed: 12/20/2022] Open
Abstract
Prostate cancer (PCa) is the leading malignancy among men. Importantly, this disease is mostly diagnosed at early stages offering a unique chemoprevention opportunity. Therefore, there is an urgent need to identify and target signaling molecules with higher expression/activity in prostate tumors and play critical role in PCa growth and progression. Here we report that NADPH oxidase (NOX) expression is directly associated with PCa progression in TRAMP mice, suggesting NOX as a potential chemoprevention target in controlling PCa. Accordingly, we assessed whether NOX activity in PCa cells could be inhibited by Graviola pulp extract (GPE) that contains unique acetogenins with strong anti-cancer effects. GPE (1–5 μg/ml) treatment strongly inhibited the hypoxia-induced NOX activity in PCa cells (LNCaP, 22Rv1 and PC3) associated with a decrease in the expression of NOX catalytic and regulatory sub-units (NOX1, NOX2 and p47phox). Furthermore, GPE-mediated NOX inhibition was associated with a strong decrease in nuclear HIF-1α levels as well as reduction in the proliferative and clonogenic potential of PCa cells. More importantly, GPE treatment neither inhibited NOX activity nor showed any cytotoxicity against non-neoplastic prostate epithelial PWR-1E cells. Overall, these results suggest that GPE could be useful in the prevention of PCa progression via inhibiting NOX activity.
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82
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Identification of NDUFAF1 in mediating K-Ras induced mitochondrial dysfunction by a proteomic screening approach. Oncotarget 2016; 6:3947-62. [PMID: 25714130 PMCID: PMC4414165 DOI: 10.18632/oncotarget.2968] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 12/17/2014] [Indexed: 01/17/2023] Open
Abstract
Increase in aerobic glycolysis and mitochondrial dysfunction are important biochemical features observed in human cancers. Recent studies suggest oncogenic K-Ras can cause suppression of mitochondrial respiration and up-regulation of glycolytic activity through a yet unknown mechanism. Here we employed proteomic approach and used a K-RasG12V inducible cell system to investigate the impact of oncogenic K-Ras on mitochondria and cell metabolism. Mitochondria isolated from cells before and after K-Ras induction were subjected to protein analysis using stable isotope labeling with amino acids (SILAC) and liquid chromatography coupled with mass spectrometry (LC-MS). 70 mitochondrial proteins with significant expression alteration after K-Ras induction were identified. A majority of these proteins were involved in energy metabolism. Five proteins with significant decrease belong to mitochondrial respiratory chain complex I. NADH dehydrogenase 1 alpha subcomplex assembly factor 1 (NDUFAF1) showed most significant decrease by 50%. Such decrease was validated in primary human pancreatic cancer tissues. Knockdown of NDUFAF1 by siRNA caused mitochondrial respiration deficiency, accumulation of NADH and subsequent increase of glycolytic activity. Our study revealed that oncogenic K-Ras is able to induce significant alterations in mitochondrial protein expression, and identified NDUFAF1 as an important molecule whose low expression contributes to mitochondrial dysfunction induced by K-Ras.
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83
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Wu WX, Yang XL, Liu BY, Deng QF, Xun MM, Wang N, Yu XQ. Lipase-catalyzed synthesis of oxidation-responsive poly(ethylene glycol)-b-poly(β-thioether ester) amphiphilic block copolymers. RSC Adv 2016. [DOI: 10.1039/c5ra21779b] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Lipase-catalyzed one-step synthesis of novel oxidation-responsive poly(ethylene glycol)-b-poly(β-thioether ester) diblock copolymers was reported.
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Affiliation(s)
- Wan-Xia Wu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xian-Ling Yang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Bei-Yu Liu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Qing-Feng Deng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Miao-Miao Xun
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Na Wang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiao-Qi Yu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
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84
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Aspirin and NSAID use in association with molecular subtypes of prostate cancer defined by TMPRSS2:ERG fusion status. Prostate Cancer Prostatic Dis 2015; 19:53-6. [PMID: 26503111 DOI: 10.1038/pcan.2015.49] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 08/25/2015] [Accepted: 09/18/2015] [Indexed: 11/08/2022]
Abstract
BACKGROUND The TMPRSS2:ERG (T2E) gene fusion is the most common rearrangement in prostate cancer (PCa). It is unknown if these molecular subtypes have a different etiology. We evaluated aspirin and non-aspirin nonsteroidal anti-inflammatory drugs (NSAIDs) in association with T2E fusion status. METHODS Subjects were from a population-based case-control study of PCa. T2E fusion status for prostatectomy cases (n=346) was determined by fluorescence in situ hybridization. Medication use was determined from questionnaires. Logistic regression, controlling for age, race, PCa family history and PSA screening, was used to evaluate the association of T2E fusion status according to medication use. RESULTS T2E fusion was present in 171 (49%) cases, with younger cases more likely to be fusion positive (P<0.01). Current aspirin use was associated with a 37% risk reduction of T2E-positive tumors (adjusted odds ratio (OR) 0.63, 95% confidence interval 0.43-0.93). Aspirin use was not associated with T2E negative PCa (adjusted OR 0.99, 0.69-1.42). There were no associations between PCa fusion status and use of nonaspirin NSAIDs or acetaminophen. CONCLUSIONS Aspirin was associated with a significant reduction in the relative risk of T2E fusion positive, but not T2E negative, PCa. As inflammation and androgen pathways are implicated in prostate carcinogenesis, additional studies of anti-inflammatory medications in relation to these PCa subtypes are warranted.
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85
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Komiya M, Fujii G, Miyamoto S, Takahashi M, Ishigamori R, Onuma W, Ishino K, Totsuka Y, Fujimoto K, Mutoh M. Suppressive effects of the NADPH oxidase inhibitor apocynin on intestinal tumorigenesis in obese KK-A(y) and Apc mutant Min mice. Cancer Sci 2015; 106:1499-505. [PMID: 26310859 PMCID: PMC4714685 DOI: 10.1111/cas.12801] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 08/10/2015] [Accepted: 08/22/2015] [Indexed: 12/11/2022] Open
Abstract
Obesity is a risk factor for colorectal cancer. The accumulation of abdominal fat tissue causes abundant reactive oxygen species production through the activation of NADPH oxidase due to excessive insulin stimulation. The enzyme NADPH oxidase catalyzes the production of reactive oxygen species and evokes the initiation and progression of tumorigenesis. Apocynin is an NADPH oxidase inhibitor that blocks the formation of the NADPH oxidase complex (active form). In this study, we investigated the effects of apocynin on the development of azoxymethane‐induced colonic aberrant crypt foci in obese KK‐Ay mice and on the development of intestinal polyps in Apc mutant Min mice. Six‐week‐old KK‐Ay mice were injected with azoxymethane (200 μg/mouse once per week for 3 weeks) and given 250 mg/L apocynin or 500 mg/L apocynin in their drinking water for 7 weeks. Six‐week‐old Min mice were also treated with 500 mg/L apocynin for 6 weeks. Treatment with apocynin reduced the number of colorectal aberrant crypt foci in KK‐Ay mice by 21% and the number of intestinal polyps in Min mice by 40% compared with untreated mice. Both groups of mice tended to show improved oxidation of serum low‐density lipoprotein and 8‐oxo‐2′‐deoxyguanosine adducts in their adipose tissues. In addition, the inducible nitric oxide synthase mRNA levels in polyp tissues decreased. Moreover, apocynin was shown to suppress nuclear factor‐κB transcriptional activity in vitro. These results suggest that apocynin and other NADPH oxidase inhibitors may be effective colorectal cancer chemopreventive agents.
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Affiliation(s)
- Masami Komiya
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan
| | - Gen Fujii
- Division of Carcinogenesis and Cancer Prevention, National Cancer Center Research Institute, Tokyo, Japan
| | - Shingo Miyamoto
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan
| | - Mami Takahashi
- Division of Central Animal Division, National Cancer Center Research Institute, Tokyo, Japan
| | - Rikako Ishigamori
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan
| | - Wakana Onuma
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan.,Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda-shi, Japan
| | - Kousuke Ishino
- Division of Integrative Oncological Pathology, Nippon Medical School, Tokyo, Japan
| | - Yukari Totsuka
- Division of Carcinogenesis and Cancer Prevention, National Cancer Center Research Institute, Tokyo, Japan
| | - Kyoko Fujimoto
- Division of Molecular Biology, Nagasaki International University, Nagasaki, Japan
| | - Michihiro Mutoh
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan.,Division of Carcinogenesis and Cancer Prevention, National Cancer Center Research Institute, Tokyo, Japan
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86
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Hemachandra LPMP, Shin DH, Dier U, Iuliano JN, Engelberth SA, Uusitalo LM, Murphy SK, Hempel N. Mitochondrial Superoxide Dismutase Has a Protumorigenic Role in Ovarian Clear Cell Carcinoma. Cancer Res 2015; 75:4973-84. [PMID: 26359457 DOI: 10.1158/0008-5472.can-14-3799] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 08/19/2015] [Indexed: 12/29/2022]
Abstract
Epithelial ovarian cancer (EOC) is the fourth leading cause of death due to cancer in women and comprises distinct histologic subtypes, which vary widely in their genetic profiles and tissues of origin. It is therefore imperative to understand the etiology of these distinct diseases. Ovarian clear cell carcinoma (OCCC), a very aggressive subtype, comprises >10% of EOCs. In the present study, we show that mitochondrial superoxide dismutase (Sod2) is highly expressed in OCCC compared with other EOC subtypes. Sod2 is an antioxidant enzyme that converts highly reactive superoxide (O2 (•-)) to hydrogen peroxide (H2O2) and oxygen (O2), and our data demonstrate that Sod2 is protumorigenic and prometastatic in OCCC. Inhibiting Sod2 expression reduces OCCC ES-2 cell tumor growth and metastasis in a chorioallantoic membrane (CAM) model. Similarly, cell proliferation, migration, spheroid attachment and outgrowth on collagen, and Akt phosphorylation are significantly decreased with reduced expression of Sod2. Mechanistically, we show that Sod2 has a dual function in supporting OCCC tumorigenicity and metastatic spread. First, Sod2 maintains highly functional mitochondria, by scavenging O2 (•-), to support the high metabolic activity of OCCC. Second, Sod2 alters the steady-state ROS balance to drive H2O2-mediated migration. While this higher steady-state H2O2 drives prometastatic behavior, it also presents a doubled-edged sword for OCCC, as it pushed the intracellular H2O2 threshold to enable more rapid killing by exogenous sources of H2O2. Understanding the complex interaction of antioxidants and ROS may provide novel therapeutic strategies to pursue for the treatment of this histologic EOC subtype.
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Affiliation(s)
- L P Madhubhani P Hemachandra
- Nanobioscience Constellation, Colleges of Nanoscale Science and Engineering, SUNY Polytechnic Institute, State University of New York, Albany, New York
| | - Dong-Hui Shin
- Nanobioscience Constellation, Colleges of Nanoscale Science and Engineering, SUNY Polytechnic Institute, State University of New York, Albany, New York. Department of Pharmacology, Penn State College of Medicine, Hershey, Pennsylvania
| | - Usawadee Dier
- Nanobioscience Constellation, Colleges of Nanoscale Science and Engineering, SUNY Polytechnic Institute, State University of New York, Albany, New York
| | - James N Iuliano
- Department of Chemistry, Stony Brook University, State University of New York, Stony Brook, New York
| | - Sarah A Engelberth
- Nanobioscience Constellation, Colleges of Nanoscale Science and Engineering, SUNY Polytechnic Institute, State University of New York, Albany, New York
| | - Larissa M Uusitalo
- Nanobioscience Constellation, Colleges of Nanoscale Science and Engineering, SUNY Polytechnic Institute, State University of New York, Albany, New York
| | - Susan K Murphy
- Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, North Carolina
| | - Nadine Hempel
- Nanobioscience Constellation, Colleges of Nanoscale Science and Engineering, SUNY Polytechnic Institute, State University of New York, Albany, New York. Department of Pharmacology, Penn State College of Medicine, Hershey, Pennsylvania.
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87
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Sun J, Hu C, Zhu Y, Sun R, Fang Y, Fan Y, Xu F. LMP1 Increases Expression of NADPH Oxidase (NOX) and Its Regulatory Subunit p22 in NP69 Nasopharyngeal Cells and Makes Them Sensitive to a Treatment by a NOX Inhibitor. PLoS One 2015; 10:e0134896. [PMID: 26244812 PMCID: PMC4526464 DOI: 10.1371/journal.pone.0134896] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 07/12/2015] [Indexed: 11/21/2022] Open
Abstract
Oxidative stress is thought to contribute to cancer development. Epstein–Barr virus (EBV) and its encoded oncoprotein, latent membrane protein 1 (LMP1), are closely associated with the transformation of nasopharyngeal carcinoma (NPC) and Burkitt’s lymphoma (BL). In this study, we used LMP1-transformed NP cells and EBV-related malignant cell lines to assess the effects of LMP1 on reactive oxygen species (ROS) accumulation and glycolytic activity. Using NPC tissue samples and a tissue array to address clinical implications, we report that LMP1 activates NAD(P)H oxidases to generate excessive amount of ROS in EBV-related malignant diseases. By evaluating NAD(P)H oxidase (NOX) subunit expression, we found that the expression of the NAD(P)H oxidase regulatory subunit p22phox was significantly upregulated upon LMP1-induced transformation. Furthermore, this upregulation was mediated by the c-Jun N-terminal kinase (JNK) pathway. In addition, LMP1 markedly stimulated anaerobic glycolytic activity through the PI3K/Akt pathway. Additionally, in both NPC cells and tissue samples, p22phox expression correlated with LMP1 expression. The NAD(P)H oxidase inhibitor diphenyleneiodonium (DPI) also exerted a marked cytotoxic effect in LMP1-transformed and malignant cells, providing a novel strategy for anticancer therapy.
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Affiliation(s)
- Jian Sun
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, P.R.China
| | - Chongyu Hu
- Hunan Provincial People’s Hospital, No.61 West Liberation Road, Changsha 410005, P.R.China
| | - Yinghui Zhu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, P.R.China
| | - Rui Sun
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, P.R.China
| | - Yujing Fang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, P.R.China
| | - Yuhua Fan
- The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P.R.China
- * E-mail: (Y. Fan); (FX)
| | - Fei Xu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, P.R.China
- * E-mail: (Y. Fan); (FX)
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88
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Wei X, Dong R, Wang D, Zhao T, Gao Y, Duffy P, Zhu X, Wang W. Supramolecular Fluorescent Nanoparticles Constructed via Multiple Non‐Covalent Interactions for the Detection of Hydrogen Peroxide in Cancer Cells. Chemistry 2015; 21:11427-34. [DOI: 10.1002/chem.201501317] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Xuan Wei
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (P.R. China), Fax: (+86) 21‐54741297
| | - Ruijiao Dong
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (P.R. China), Fax: (+86) 21‐54741297
| | - Dali Wang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (P.R. China), Fax: (+86) 21‐54741297
| | - Tianyu Zhao
- Charles Institute of Dermatology, School of Medicine and Medical Science, University College Dublin, Belfield, Dublin 4 (Ireland), Fax: (+353) 1‐7166341
| | - Yongsheng Gao
- Charles Institute of Dermatology, School of Medicine and Medical Science, University College Dublin, Belfield, Dublin 4 (Ireland), Fax: (+353) 1‐7166341
| | - Patrick Duffy
- Charles Institute of Dermatology, School of Medicine and Medical Science, University College Dublin, Belfield, Dublin 4 (Ireland), Fax: (+353) 1‐7166341
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (P.R. China), Fax: (+86) 21‐54741297
| | - Wenxin Wang
- Charles Institute of Dermatology, School of Medicine and Medical Science, University College Dublin, Belfield, Dublin 4 (Ireland), Fax: (+353) 1‐7166341
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89
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Gao YF, Yuan F, Liu J, Li LP, He YC, Gao RJ, Cai YD, Jiang Y. Identification of New Candidate Genes and Chemicals Related to Esophageal Cancer Using a Hybrid Interaction Network of Chemicals and Proteins. PLoS One 2015; 10:e0129474. [PMID: 26058041 PMCID: PMC4461353 DOI: 10.1371/journal.pone.0129474] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 05/10/2015] [Indexed: 01/04/2023] Open
Abstract
Cancer is a serious disease responsible for many deaths every year in both developed and developing countries. One reason is that the mechanisms underlying most types of cancer are still mysterious, creating a great block for the design of effective treatments. In this study, we attempted to clarify the mechanism underlying esophageal cancer by searching for novel genes and chemicals. To this end, we constructed a hybrid network containing both proteins and chemicals, and generalized an existing computational method previously used to identify disease genes to identify new candidate genes and chemicals simultaneously. Based on jackknife test, our generalized method outperforms or at least performs at the same level as those obtained by a widely used method - the Random Walk with Restart (RWR). The analysis results of the final obtained genes and chemicals demonstrated that they highly shared gene ontology (GO) terms and KEGG pathways with direct and indirect associations with esophageal cancer. In addition, we also discussed the likelihood of selected candidate genes and chemicals being novel genes and chemicals related to esophageal cancer.
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Affiliation(s)
- Yu-Fei Gao
- Department of Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China
| | - Fei Yuan
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, People’s Republic of China
| | - Junbao Liu
- Department of Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China
| | - Li-Peng Li
- Department of Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China
| | - Yi-Chun He
- Department of Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China
| | - Ru-Jian Gao
- Department of Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China
| | - Yu-Dong Cai
- College of Life Science, Shanghai University, Shanghai 200444, People’s Republic of China
| | - Yang Jiang
- Department of Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, People’s Republic of China
- * E-mail:
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90
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Wang P, Sun YC, Lu WH, Huang P, Hu Y. Selective killing of K-ras-transformed pancreatic cancer cells by targeting NAD(P)H oxidase. CHINESE JOURNAL OF CANCER 2015; 34:166-76. [PMID: 25963558 PMCID: PMC4593348 DOI: 10.1186/s40880-015-0012-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Accepted: 12/22/2014] [Indexed: 01/18/2023]
Abstract
Introduction Oncogenic activation of the K-ras gene occurs in >90% of pancreatic ductal carcinoma and plays a critical role in the pathogenesis of this malignancy. Increase of reactive oxygen species (ROS) has also been observed in a wide spectrum of cancers. This study aimed to investigate the mechanistic association between K-ras–induced transformation and increased ROS stress and its therapeutic implications in pancreatic cancer. Methods ROS level, NADPH oxidase (NOX) activity and expression, and cell invasion were examined in human pancreatic duct epithelial E6E7 cells transfected with K-rasG12V compared with parental E6E7 cells. The cytotoxic effect and antitumor effect of capsaicin, a NOX inhibitor, were also tested in vitro and in vivo. Results K-ras transfection caused activation of the membrane-associated redox enzyme NOX and elevated ROS generation through the phosphatidylinositol 3′-kinase (PI3K) pathway. Importantly, capsaicin preferentially inhibited the enzyme activity of NOX and induced severe ROS accumulation in K-ras–transformed cells compared with parental E6E7 cells. Furthermore, capsaicin effectively inhibited cell proliferation, prevented invasiveness of K-ras–transformed pancreatic cancer cells, and caused minimum toxicity to parental E6E7 cells. In vivo, capsaicin exhibited antitumor activity against pancreatic cancer and showed oxidative damage to the xenograft tumor cells. Conclusions K-ras oncogenic signaling causes increased ROS stress through NOX, and abnormal ROS stress can selectively kill tumor cells by using NOX inhibitors. Our study provides a basis for developing a novel therapeutic strategy to effectively kill K-ras–transformed cells through a redox-mediated mechanism.
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Affiliation(s)
- Peng Wang
- Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, 510060, P.R. China. .,Institute of Cardiopulmonary Cerebral Resuscitation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510000, P.R. China.
| | - Yi-Chen Sun
- Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, 510060, P.R. China.
| | - Wen-Hua Lu
- Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, 510060, P.R. China.
| | - Peng Huang
- Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, 510060, P.R. China. .,Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
| | - Yumin Hu
- Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, 510060, P.R. China.
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91
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Bertram K, Valcu CM, Weitnauer M, Linne U, Görlach A. NOX1 supports the metabolic remodeling of HepG2 cells. PLoS One 2015; 10:e0122002. [PMID: 25806803 PMCID: PMC4373763 DOI: 10.1371/journal.pone.0122002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 02/09/2015] [Indexed: 12/31/2022] Open
Abstract
NADPH oxidases are important sources of reactive oxygen species (ROS) which act as signaling molecules in the regulation of protein expression, cell proliferation, differentiation, migration and cell death. The NOX1 subunit is over-expressed in several cancers and NOX1 derived ROS have been repeatedly linked with tumorigenesis and tumor progression although underlying pathways are ill defined. We engineered NOX1-depleted HepG2 hepatoblastoma cells and employed differential display 2DE experiments in order to investigate changes in NOX1-dependent protein expression profiles. A total of 17 protein functions were identified to be dysregulated in NOX1-depleted cells. The proteomic results support a connection between NOX1 and the Warburg effect and a role for NOX in the regulation of glucose and glutamine metabolism as well as of lipid, protein and nucleotide synthesis in hepatic tumor cells. Metabolic remodeling is a common feature of tumor cells and understanding the underlying mechanisms is essential for the development of new cancer treatments. Our results reveal a manifold involvement of NOX1 in the metabolic remodeling of hepatoblastoma cells towards a sustained production of building blocks required to maintain a high proliferative rate, thus rendering NOX1 a potential target for cancer therapy.
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Affiliation(s)
- Katharina Bertram
- Experimental and Molecular Paediatric Cardiology, German Heart Centre Munich at the Technical University Munich, Lazarettstr. 36, Munich, Germany
| | - Cristina-Maria Valcu
- Experimental and Molecular Paediatric Cardiology, German Heart Centre Munich at the Technical University Munich, Lazarettstr. 36, Munich, Germany
- * E-mail: (CMV), (AG)
| | - Michael Weitnauer
- Experimental and Molecular Paediatric Cardiology, German Heart Centre Munich at the Technical University Munich, Lazarettstr. 36, Munich, Germany
| | - Uwe Linne
- Chemistry Department—Mass Spectrometry, Philipps-University Marburg, Hans-Meerwein-Strasse, Marburg, Germany
| | - Agnes Görlach
- Experimental and Molecular Paediatric Cardiology, German Heart Centre Munich at the Technical University Munich, Lazarettstr. 36, Munich, Germany
- * E-mail: (CMV), (AG)
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92
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Dong R, Zhou Y, Huang X, Zhu X, Lu Y, Shen J. Functional supramolecular polymers for biomedical applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:498-526. [PMID: 25393728 DOI: 10.1002/adma.201402975] [Citation(s) in RCA: 338] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/17/2014] [Indexed: 05/08/2023]
Abstract
As a novel class of dynamic and non-covalent polymers, supramolecular polymers not only display specific structural and physicochemical properties, but also have the ability to undergo reversible changes of structure, shape, and function in response to diverse external stimuli, making them promising candidates for widespread applications ranging from academic research to industrial fields. By an elegant combination of dynamic/reversible structures with exceptional functions, functional supramolecular polymers are attracting increasing attention in various fields. In particular, functional supramolecular polymers offer several unique advantages, including inherent degradable polymer backbones, smart responsiveness to various biological stimuli, and the ease for the incorporation of multiple biofunctionalities (e.g., targeting and bioactivity), thereby showing great potential for a wide range of applications in the biomedical field. In this Review, the trends and representative achievements in the design and synthesis of supramolecular polymers with specific functions are summarized, as well as their wide-ranging biomedical applications such as drug delivery, gene transfection, protein delivery, bio-imaging and diagnosis, tissue engineering, and biomimetic chemistry. These achievements further inspire persistent efforts in an emerging interdisciplin-ary research area of supramolecular chemistry, polymer science, material science, biomedical engineering, and nanotechnology.
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Affiliation(s)
- Ruijiao Dong
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, PR China
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93
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Höll M, Koziel R, Schäfer G, Pircher H, Pauck A, Hermann M, Klocker H, Jansen-Dürr P, Sampson N. ROS signaling by NADPH oxidase 5 modulates the proliferation and survival of prostate carcinoma cells. Mol Carcinog 2015; 55:27-39. [PMID: 25559363 PMCID: PMC4949723 DOI: 10.1002/mc.22255] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 10/14/2014] [Accepted: 11/03/2014] [Indexed: 01/31/2023]
Abstract
Prostate cancer (PCa) is the most commonly diagnosed cancer and second leading cause of male cancer death in Western nations. Thus, new treatment modalities are urgently needed. Elevated production of reactive oxygen species (ROS) by NADPH oxidase (Nox) enzymes is implicated in tumorigenesis of the prostate and other tissues. However, the identity of the Nox enzyme(s) involved in prostate carcinogenesis remains largely unknown. Analysis of radical prostatectomy tissue samples and benign and malignant prostate epithelial cell lines identified Nox5 as an abundantly expressed Nox isoform. Consistently, immunohistochemical staining of a human PCa tissue microarray revealed distinct Nox5 expression in epithelial cells of benign and malignant prostatic glands. shRNA‐mediated knockdown of Nox5 impaired proliferation of Nox5‐expressing (PC‐3, LNCaP) but not Nox5‐negative (DU145) PCa cell lines. Similar effects were observed upon ROS ablation via the antioxidant N‐acetylcysteine confirming ROS as the mediators. In addition, Nox5 silencing increased apoptosis of PC‐3 cells. Concomitantly, protein kinase C zeta (PKCζ) protein levels and c‐Jun N‐terminal kinase (JNK) phosphorylation were reduced. Moreover, the effect of Nox5 knockdown on PC‐3 cell proliferation could be mimicked by pharmacological inhibition of JNK. Collectively, these data indicate that Nox5 is expressed at functionally relevant levels in the human prostate and clinical PCa. Moreover, findings herein suggest that Nox5‐derived ROS and subsequent depletion of PKCζ and JNK inactivation play a critical role in modulating intracellular signaling cascades involved in the proliferation and survival of PCa cells. © 2014 The Authors. Molecular Carcinogenesis published by Wiley Periodicals, Inc.
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Affiliation(s)
- Monika Höll
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria.,Tyrolean Cancer Research Institute, Medical University of Innsbruck, Innsbruck, Austria
| | - Rafal Koziel
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - Georg Schäfer
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - Haymo Pircher
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - Alexander Pauck
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - Martin Hermann
- Department of Anaesthesiology and Critical Care Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Helmut Klocker
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - Pidder Jansen-Dürr
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria.,Tyrolean Cancer Research Institute, Medical University of Innsbruck, Innsbruck, Austria
| | - Natalie Sampson
- Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
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94
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Weaver JR, Grzesik W, Taylor-Fishwick DA. Inhibition of NADPH oxidase-1 preserves beta cell function. Diabetologia 2015; 58:113-21. [PMID: 25277953 DOI: 10.1007/s00125-014-3398-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 09/09/2014] [Indexed: 02/07/2023]
Abstract
AIMS/HYPOTHESIS Upregulation of the reactive oxygen species (ROS)-producing enzyme NADPH oxidase (NOX)-1 in islets and beta cells follows acute exposure to inflammatory cytokines and is concomitant with beta cell dysfunction. NOX-1 is a candidate mediator of inflammation-induced beta cell dysfunction. This study aimed to determine whether selective inhibition of NADPH oxidase-1 presents a new strategy to preserve beta cell function. METHODS Induced beta cell dysfunction was studied in primary human donor islets, isolated mouse islets and murine beta cell lines. Islets and beta cells were stimulated with inflammatory cytokines (TNF-α, IL-1β, IFN-γ). NOX-1 activity was blocked by the selective inhibitor ML171. RESULTS Cytokine induction of intracellular ROS was reduced 80% with 1 μmol/l ML171 in murine beta cell lines (p < 0.01). Cytokine-induced apoptosis, measured by caspase-3 activation or quantified fluorescence microscopy, was prevented in islets and beta cell lines up to 100% with ML171 in a concentration-dependent manner (p < 0.05). Functionally, glucose-stimulated insulin secretion was abolished by cytokine exposure but preserved by ML171 in isolated mouse islets and murine beta cell lines. A feed-forward regulation of NOX-1 in islets and beta cell lines was disrupted by ML171. CONCLUSIONS/INTERPRETATION Stimulation of NOX-1 activity is a major component of inflammatory cytokine-induced beta cell dysfunction. Significant protection of beta cells is conferred with selective inhibition of NOX-1. Suppression of NOX-1 activity may present a new therapeutic strategy to preserve and protect beta cell function in diabetes.
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Affiliation(s)
- Jessica R Weaver
- Department of Microbiology and Molecular Cell Biology, LH 2128, Eastern Virginia Medical School, 700 W. Olney Road, Norfolk, VA, 23507, USA
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95
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Phaniendra A, Jestadi DB, Periyasamy L. Free radicals: properties, sources, targets, and their implication in various diseases. Indian J Clin Biochem 2015; 30:11-26. [PMID: 25646037 PMCID: PMC4310837 DOI: 10.1007/s12291-014-0446-0] [Citation(s) in RCA: 1227] [Impact Index Per Article: 136.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 05/14/2014] [Indexed: 02/07/2023]
Abstract
Free radicals and other oxidants have gained importance in the field of biology due to their central role in various physiological conditions as well as their implication in a diverse range of diseases. The free radicals, both the reactive oxygen species (ROS) and reactive nitrogen species (RNS), are derived from both endogenous sources (mitochondria, peroxisomes, endoplasmic reticulum, phagocytic cells etc.) and exogenous sources (pollution, alcohol, tobacco smoke, heavy metals, transition metals, industrial solvents, pesticides, certain drugs like halothane, paracetamol, and radiation). Free radicals can adversely affect various important classes of biological molecules such as nucleic acids, lipids, and proteins, thereby altering the normal redox status leading to increased oxidative stress. The free radicals induced oxidative stress has been reported to be involved in several diseased conditions such as diabetes mellitus, neurodegenerative disorders (Parkinson's disease-PD, Alzheimer's disease-AD and Multiple sclerosis-MS), cardiovascular diseases (atherosclerosis and hypertension), respiratory diseases (asthma), cataract development, rheumatoid arthritis and in various cancers (colorectal, prostate, breast, lung, bladder cancers). This review deals with chemistry, formation and sources, and molecular targets of free radicals and it provides a brief overview on the pathogenesis of various diseased conditions caused by ROS/RNS.
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Affiliation(s)
- Alugoju Phaniendra
- Department of Biochemistry and Molecular Biology, Pondicherry University, Pondicherry, 605 014 India
| | - Dinesh Babu Jestadi
- Department of Biochemistry and Molecular Biology, Pondicherry University, Pondicherry, 605 014 India
| | - Latha Periyasamy
- Department of Biochemistry and Molecular Biology, Pondicherry University, Pondicherry, 605 014 India
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96
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Liu B, Wang D, Liu Y, Zhang Q, Meng L, Chi H, Shi J, Li G, Li J, Zhu X. Hydrogen peroxide-responsive anticancer hyperbranched polymer micelles for enhanced cell apoptosis. Polym Chem 2015. [DOI: 10.1039/c5py00257e] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen peroxide-responsive nanomicelles from hyperbranched polymers were developed for effective cancer therapy through enhanced apoptotic cell death.
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Affiliation(s)
- Bing Liu
- Department of Oral and Maxillofacial Surgery
- The First Affiliated Hospital of Harbin Medical University
- Harbin 150001
- People's Republic of China
| | - Dali Wang
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- People's Republic of China
| | - Yakun Liu
- Department of Oral and Maxillofacial Surgery
- The First Affiliated Hospital of Harbin Medical University
- Harbin 150001
- People's Republic of China
| | - Qian Zhang
- Department of Oral and Maxillofacial Surgery
- The First Affiliated Hospital of Harbin Medical University
- Harbin 150001
- People's Republic of China
| | - Lili Meng
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- People's Republic of China
| | - Huirong Chi
- Department of Oral and Maxillofacial Surgery
- The First Affiliated Hospital of Harbin Medical University
- Harbin 150001
- People's Republic of China
| | - Jinna Shi
- Department of Periodontology
- The First Affiliated Hospital of Harbin Medical University
- Harbin 150001
- People's Republic of China
| | - Guolin Li
- Department of Oral and Maxillofacial Surgery
- The First Affiliated Hospital of Harbin Medical University
- Harbin 150001
- People's Republic of China
| | - Jichen Li
- Department of Oral and Maxillofacial Surgery
- The First Affiliated Hospital of Harbin Medical University
- Harbin 150001
- People's Republic of China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- People's Republic of China
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97
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Fuchs AV, Gemmell AC, Thurecht KJ. Utilising polymers to understand diseases: advanced molecular imaging agents. Polym Chem 2015. [DOI: 10.1039/c4py01311e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This review describes how the highly tuneable size, shape and chemical functionality of polymeric molecular imaging agents provides a means to intimately probe the various mechanisms behind disease formation and behaviour.
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Affiliation(s)
- Adrian V. Fuchs
- Centre for Advanced Imaging and Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- St Lucia
- Australia
| | - Anna C. Gemmell
- Centre for Advanced Imaging and Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- St Lucia
- Australia
| | - Kristofer J. Thurecht
- Centre for Advanced Imaging and Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- St Lucia
- Australia
- ARC Centre of Excellence in Bio-Nano Science and Technology
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98
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Green synthesis of silver nanoparticles on nitrogen-doped graphene for hydrogen peroxide detection. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.08.133] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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99
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Kim EJ, Bhuniya S, Lee H, Kim HM, Cheong C, Maiti S, Hong KS, Kim JS. An Activatable Prodrug for the Treatment of Metastatic Tumors. J Am Chem Soc 2014; 136:13888-94. [DOI: 10.1021/ja5077684] [Citation(s) in RCA: 189] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Eun-Joong Kim
- Division of MR Research, Korea Basic Science Institute, Cheongju 363-883, Korea
| | | | - Hyunseung Lee
- Division of MR Research, Korea Basic Science Institute, Cheongju 363-883, Korea
| | - Hyun Min Kim
- Division of MR Research, Korea Basic Science Institute, Cheongju 363-883, Korea
| | - Chaejoon Cheong
- Division of MR Research, Korea Basic Science Institute, Cheongju 363-883, Korea
- Department of Bio-analytical Science, University of Science & Technology, Daejeon 305-350, Korea
| | - Sukhendu Maiti
- Department
of Chemistry, Korea University, Seoul 136-701, Korea
| | - Kwan Soo Hong
- Division of MR Research, Korea Basic Science Institute, Cheongju 363-883, Korea
- Department of Bio-analytical Science, University of Science & Technology, Daejeon 305-350, Korea
| | - Jong Seung Kim
- Department
of Chemistry, Korea University, Seoul 136-701, Korea
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100
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Streeter J, Schickling BM, Jiang S, Stanic B, Thiel WH, Gakhar L, Houtman JCD, Miller FJ. Phosphorylation of Nox1 regulates association with NoxA1 activation domain. Circ Res 2014; 115:911-8. [PMID: 25228390 DOI: 10.1161/circresaha.115.304267] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
RATIONALE Activation of Nox1 initiates redox-dependent signaling events crucial in the pathogenesis of vascular disease. Selective targeting of Nox1 is an attractive potential therapy, but requires a better understanding of the molecular modifications controlling its activation. OBJECTIVE To determine whether posttranslational modifications of Nox1 regulate its activity in vascular cells. METHODS AND RESULTS We first found evidence that Nox1 is phosphorylated in multiple models of vascular disease. Next, studies using mass spectroscopy and a pharmacological inhibitor demonstrated that protein kinase C-beta1 mediates phosphorylation of Nox1 in response to tumor necrosis factor-α. siRNA-mediated silencing of protein kinase C-beta1 abolished tumor necrosis factor-α-mediated reactive oxygen species production and vascular smooth muscle cell migration. Site-directed mutagenesis and isothermal titration calorimetry indicated that protein kinase C-beta1 phosphorylates Nox1 at threonine 429. Moreover, Nox1 threonine 429 phosphorylation facilitated the association of Nox1 with the NoxA1 activation domain and was necessary for NADPH oxidase complex assembly, reactive oxygen species production, and vascular smooth muscle cell migration. CONCLUSIONS We conclude that protein kinase C-beta1 phosphorylation of threonine 429 regulates activation of Nox1 NADPH oxidase.
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Affiliation(s)
- Jennifer Streeter
- From the Departments of Internal Medicine (B.M.S., S.J., B.S., W.H.T., F.J.M.), Microbiology (J.C.D.H.), Anatomy and Cell Biology (J.S.), Biochemistry (L.G.), and Protein Crystallography Facility (L.G.), University of Iowa, Iowa City; and Veterans Affair Medical Center, Iowa City, IA (F.J.M.)
| | - Brandon M Schickling
- From the Departments of Internal Medicine (B.M.S., S.J., B.S., W.H.T., F.J.M.), Microbiology (J.C.D.H.), Anatomy and Cell Biology (J.S.), Biochemistry (L.G.), and Protein Crystallography Facility (L.G.), University of Iowa, Iowa City; and Veterans Affair Medical Center, Iowa City, IA (F.J.M.)
| | - Shuxia Jiang
- From the Departments of Internal Medicine (B.M.S., S.J., B.S., W.H.T., F.J.M.), Microbiology (J.C.D.H.), Anatomy and Cell Biology (J.S.), Biochemistry (L.G.), and Protein Crystallography Facility (L.G.), University of Iowa, Iowa City; and Veterans Affair Medical Center, Iowa City, IA (F.J.M.)
| | - Bojana Stanic
- From the Departments of Internal Medicine (B.M.S., S.J., B.S., W.H.T., F.J.M.), Microbiology (J.C.D.H.), Anatomy and Cell Biology (J.S.), Biochemistry (L.G.), and Protein Crystallography Facility (L.G.), University of Iowa, Iowa City; and Veterans Affair Medical Center, Iowa City, IA (F.J.M.)
| | - William H Thiel
- From the Departments of Internal Medicine (B.M.S., S.J., B.S., W.H.T., F.J.M.), Microbiology (J.C.D.H.), Anatomy and Cell Biology (J.S.), Biochemistry (L.G.), and Protein Crystallography Facility (L.G.), University of Iowa, Iowa City; and Veterans Affair Medical Center, Iowa City, IA (F.J.M.)
| | - Lokesh Gakhar
- From the Departments of Internal Medicine (B.M.S., S.J., B.S., W.H.T., F.J.M.), Microbiology (J.C.D.H.), Anatomy and Cell Biology (J.S.), Biochemistry (L.G.), and Protein Crystallography Facility (L.G.), University of Iowa, Iowa City; and Veterans Affair Medical Center, Iowa City, IA (F.J.M.)
| | - Jon C D Houtman
- From the Departments of Internal Medicine (B.M.S., S.J., B.S., W.H.T., F.J.M.), Microbiology (J.C.D.H.), Anatomy and Cell Biology (J.S.), Biochemistry (L.G.), and Protein Crystallography Facility (L.G.), University of Iowa, Iowa City; and Veterans Affair Medical Center, Iowa City, IA (F.J.M.)
| | - Francis J Miller
- From the Departments of Internal Medicine (B.M.S., S.J., B.S., W.H.T., F.J.M.), Microbiology (J.C.D.H.), Anatomy and Cell Biology (J.S.), Biochemistry (L.G.), and Protein Crystallography Facility (L.G.), University of Iowa, Iowa City; and Veterans Affair Medical Center, Iowa City, IA (F.J.M.).
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