1
|
Jung T, Findik N, Hartmann B, Hanack K, Grossmann K, Roggenbuck D, Wegmann M, Mantke R, Deckert M, Grune T. Automated determination of 8-OHdG in cells and tissue via immunofluorescence using a specially created antibody. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2024; 42:e00833. [PMID: 38948353 PMCID: PMC11211097 DOI: 10.1016/j.btre.2024.e00833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 02/27/2024] [Accepted: 02/27/2024] [Indexed: 07/02/2024]
Abstract
Despite powerful DNA repair systems, oxidative damage/modification to DNA is an inevitable side effect of metabolism, ionizing radiation, lifestyle habits, inflammatory pathologies such as type-2 diabetes or metabolic syndrome, cancer and natural aging. One of the most common oxidative DNA modifications is 8-OHdG (8‑hydroxy-2'-deoxyguanosine), which is the most widely used marker in research and clinical diagnostics. 8-OHdG is easily and specifically detectable in various samples such as urine, plasma, cells and tissues via a large variety of methods like ELISA, HPLC, chromatographic methods, and immunochemistry. Formed by oxidation of guanine and being representative for the degree of DNA damage, 8-OHdG can be also used as biomarker for risk assessment of various cancers as well as degenerative diseases. Here, we present a highly specific, self-developed 8-OHdG antibody in successful comparison to a commercially one, tested in cells (FF95, HCT116, and HT22) and intestinal tissue, focusing on automatized evaluation via fluorescence/confocal microscopy.
Collapse
Affiliation(s)
- Tobias Jung
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Arthur-Scheunert-Allee 114-116 14558, Nuthetal, Germany
- German Center for Cardiovascular Research (DZHK), 10117, Berlin, Germany
| | - Nicole Findik
- new/era/mabs GmbH, August-Bebel-Str. 89 14482 Potsdam, Germany
| | - Bianca Hartmann
- new/era/mabs GmbH, August-Bebel-Str. 89 14482 Potsdam, Germany
| | - Katja Hanack
- new/era/mabs GmbH, August-Bebel-Str. 89 14482 Potsdam, Germany
- University of Potsdam, Department of Biochemistry and Biology, Chair of Immunotechnology, Karl-Liebknecht-Str. 24-25, Build 29, Office 1.55 14476 Potsdam, Germany
| | | | - Dirk Roggenbuck
- Faculty of Health Sciences Brandenburg, Brandenburg Technical University Cottbus-Senftenberg
| | - Marc Wegmann
- MEDIPAN GmbH, Ludwig-Erhard-Ring 3 15827 Dahlewitz
| | - René Mantke
- Brandenburg Medical School Theodor Fontane, Klinik für Allgemein- und Viszeralchirurgie, Klinikum Brandenburg, Hochstraße 29 14770 Brandenburg an der Havel, Germany
| | - Markus Deckert
- Brandenburg Medical School Theodor Fontane, Theodor Fontane Campus Brandenburg, Hämatologie, Onkologie SKB, IAG Psychoonkologie und Palliativversorgung, Hochstraße 29, 14770 Brandenburg an der Havel, Germany
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Arthur-Scheunert-Allee 114-116 14558, Nuthetal, Germany
- German Center for Cardiovascular Research (DZHK), 10117, Berlin, Germany
- German Center for Diabetes Research (DZD) 85764 Muenchen-Neuherberg, Germany
- NutriAct – Competence Cluster Nutrition Research Berlin-Potsdam, 14558 Nuthetal, Germany
- University of Potsdam, Institute of Nutrition 14558 Nuthetal, Germany
| |
Collapse
|
2
|
Choi S, Rahman RT, Kim BM, Kang J, Kim J, Shim J, Nam YS. Photochemically Inert Broad-Spectrum Sunscreen by Metal-Phenolic Network Coatings of Titanium Oxide Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2024; 16:16767-16777. [PMID: 38512769 DOI: 10.1021/acsami.4c00174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Titanium dioxide (TiO2) nanoparticles are extensively used as a sunscreen filter due to their long-active ultraviolet (UV)-blocking performance. However, their practical use is being challenged by high photochemical activities and limited absorption spectrum. Current solutions include the coating of TiO2 with synthetic polymers and formulating a sunscreen product with additional organic UV filters. Unfortunately, these approaches are no longer considered effective because of recent environmental and public health issues. Herein, TiO2-metal-phenolic network hybrid nanoparticles (TiO2-MPN NPs) are developed as the sole active ingredient for sunscreen products through photochemical suppression and absorption spectrum widening. The MPNs are generated by the complexation of tannic acid with multivalent metal ions, forming a robust coating shell. The TiO2-MPN hybridization extends the absorption region to the high-energy-visible (HEV) light range via a new ligand-to-metal charge transfer photoexcitation pathway, boosting both the sun protection factor and ultraviolet-A protection factor about 4-fold. The TiO2-MPN NPs suppressed the photoinduced reactive oxygen species by 99.9% for 6 h under simulated solar irradiation. Accordingly, they substantially alleviated UV- and HEV-induced cytotoxicity of fibroblasts. This work outlines a new tactic for the eco-friendly and biocompatible design of sunscreen agents by selectively inhibiting the photocatalytic activities of semiconductor nanoparticles while broadening their optical spectrum.
Collapse
Affiliation(s)
- Saehan Choi
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Rafia Tasnim Rahman
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Bo-Min Kim
- Department of Applied Chemistry, Dongduk Women's University, Seoul 02748, Republic of Korea
| | - Juyeon Kang
- Department of Applied Chemistry, Dongduk Women's University, Seoul 02748, Republic of Korea
| | - Jeonga Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Jongwon Shim
- Department of Applied Chemistry, Dongduk Women's University, Seoul 02748, Republic of Korea
| | - Yoon Sung Nam
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| |
Collapse
|
3
|
Zhang M, Chen Y, Wang Q, Li C, Yuan C, Lu J, Luo Y, Liu X. Nanocatalytic theranostics with intracellular mutual promotion for ferroptosis and chemo-photothermal therapy. J Colloid Interface Sci 2024; 657:619-631. [PMID: 38071811 DOI: 10.1016/j.jcis.2023.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 11/29/2023] [Accepted: 12/01/2023] [Indexed: 01/02/2024]
Abstract
The reactive oxygen species (ROS) produced through the Fenton reaction, induces lipid peroxide (LPO), causing cellular structural damage and ultimately triggering ferroptosis. However, the generation of ROS in the tumor microenvironment (TME) is limited by the catalytic efficiency of the Fenton reaction. Herein, a novel hollow mesoporous silica nanoparticle (HMSN) combined with multi-metal sulfide-doped mesoporous silica nanocatalyzers (NCs) was developed, namely MxSy-HMSN NCs (M represents Cu Mn and Fe, S denotes sulfur). The MxSy-HMSN can dramatically enhanced the ferroptosis by: (1) facilitating the conversion of H2O2 to ·OH through Fenton or Fenton-like reactions through co-catalysis; (2) weakening ROS scavenging systems by depleting the over expressed glutathione (GSH) in TME; (3) providing exceptional photothermal therapy to augment ferroptosis. The MxSy-HMSN can also act as smart cargos for anticancer drug-doxorubicin (DOX). The release of DOX is responsive to GSH/pH/Near-infrared Light (NIR) irradiation at the tumor lesion, significantly improving therapeutic outcomes while minimizing side effects. Additionally, the MxSy-HMSN has demonstrated excellent magnetic resonance imaging (MRI) potential. This smart MxSy-HMSN offer a synergetic approach combining ferroptosis with chemo-photothermal therapy and magnetic resonance imaging (MRI) diagnose, which could be an informative guideline for the design of future NCs.
Collapse
Affiliation(s)
- Minyi Zhang
- School of Chemistry and Chemical Engineering, Shanghai Engineering Technology Research Center for Pharmaceutical Intelligent Equipment, Shanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNA, Institute for Frontier Medical Technology, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Ying Chen
- Department of Radiation Oncology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, No.1111, Xianxia Road, Shanghai 200336, China
| | - Qi Wang
- Research Institute of Digital and Intelligent Orthopedics, Department of Orthopedics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, No. 2800 Gongwei Road, Huinan Town, Pudong, Shanghai 201399, China
| | - Chunlin Li
- Trauma Center, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 201620, China
| | - Chunping Yuan
- School of Chemistry and Chemical Engineering, Shanghai Engineering Technology Research Center for Pharmaceutical Intelligent Equipment, Shanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNA, Institute for Frontier Medical Technology, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Jie Lu
- School of Chemistry and Chemical Engineering, Shanghai Engineering Technology Research Center for Pharmaceutical Intelligent Equipment, Shanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNA, Institute for Frontier Medical Technology, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Yu Luo
- School of Chemistry and Chemical Engineering, Shanghai Engineering Technology Research Center for Pharmaceutical Intelligent Equipment, Shanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNA, Institute for Frontier Medical Technology, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Xijian Liu
- School of Chemistry and Chemical Engineering, Shanghai Engineering Technology Research Center for Pharmaceutical Intelligent Equipment, Shanghai Frontiers Science Research Center for Druggability of Cardiovascular Noncoding RNA, Institute for Frontier Medical Technology, Shanghai University of Engineering Science, Shanghai 201620, China.
| |
Collapse
|
4
|
Yang LY, Zhu QH, Chen JY, Lin LB, Liang MZ, Zhang QL. Genome-wide transcriptomics and microRNAomics analyses uncover multi-faceted mechanisms to cope with copper stress in ancient macrobenthos amphioxus. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131594. [PMID: 37330373 DOI: 10.1016/j.jhazmat.2023.131594] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/20/2023] [Accepted: 05/05/2023] [Indexed: 06/19/2023]
Abstract
The mechanisms underlying the toxicity of environmental stress are unclear for marine macrobenthos. Copper/Cu has posed the most serious threats to amphioxus, an ancient and model benthic cephalochordate. Herein, a dynamic change in the physiological parameters (GR, SOD, ATP, and MDA) was detected with ROS accumulation in Branchiostoma belcheri exposed to 0.3 mg·L-1 Cu. Transcriptomes and microRNAomes of B. belcheri were generated to investigate the molecular mechanisms by which this amphioxus copes with Cu exposure. Time-specific genes identified at different time points after exposure were involved in the stimulus and immune response, detoxification and ionic homeostasis, aging and the nervous system, sequentially, with prolongation of exposure time, forming a dynamic process of molecular response to Cu stress. In total, 57 differentially expressed miRNAs were identified under Cu stress. Transcriptomics-miRNAomics analyses indicate that these miRNAs targeted genes associated with many key biological processes such as xenobiotics degradation, oxidative stress, and energy metabolism. The constructed miRNA-mRNA-pathway network uncovered a broad post-transcriptional regulatory mechanism in B. belcheri to cope with Cu stress. Overall, this integrated analyses show that enhanced defense response, accelerated ROS elimination, and repressed ATP production constitute a comprehensive strategy to cope with Cu toxicity in the ancient macrobenthos.
Collapse
Affiliation(s)
- Lin-Yu Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China; Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China
| | - Qian-Hua Zhu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Jun-Yuan Chen
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Science, Nanjing University, Nanjing 210023, China
| | - Lian-Bing Lin
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Ming-Zhong Liang
- Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China.
| | - Qi-Lin Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China.
| |
Collapse
|
5
|
Liu Y, Dong W, Jiang X, Xu J, Yang K, Zhu L, Lin D. Efficient Degradation of Intracellular Antibiotic Resistance Genes by Photosensitized Erythrosine-Produced 1O 2. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12105-12116. [PMID: 37531556 DOI: 10.1021/acs.est.3c03103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
Intracellular antibiotic resistance genes (iARGs) constitute the important part of wastewater ARGs and need to be efficiently removed. However, due to the dual protection of intracellular DNA by bacterial membranes and the cytoplasm, present disinfection technologies are largely inefficient in iARG degradation. Herein, we for the first time found that erythrosine (ERY, an edible dye) could efficiently degrade iARGs by producing abundant 1O2 under visible light. Seven log antibiotic-resistant bacteria were inactivated within only 1.5 min, and 6 log iARGs were completely degraded within 40 min by photosensitized ERY (5.0 mg/L). A linear relationship was established between ARG degradation rate constants and 1O2 concentrations in the ERY photosensitizing system. Surprisingly, a 3.2-fold faster degradation of iARGs than extracellular ARGs was observed, which was attributed to the unique indirect oxidation of iARGs induced by 1O2. Furthermore, ERY photosensitizing was effective for iARG degradation in real wastewater and other photosensitizers (including Rose Bengal and Phloxine B) of high 1O2 yields could also achieve efficient iARG degradation. The findings increase our knowledge of the iARG degradation preference by 1O2 and provide a new strategy of developing technologies with high 1O2 yield, like ERY photosensitizing, for efficient iARG removal.
Collapse
Affiliation(s)
- Yi Liu
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Wenhua Dong
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xunheng Jiang
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Jiang Xu
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Kun Yang
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Lizhong Zhu
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Ecological Civilization Academy, Anji 313300, China
| | - Daohui Lin
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Ecological Civilization Academy, Anji 313300, China
| |
Collapse
|
6
|
Wanas H, Elbadawy HM, Almikhlafi MA, Hamoud AE, Ali EN, Galal AM. Combination of Niclosamide and Pirfenidone Alleviates Pulmonary Fibrosis by Inhibiting Oxidative Stress and MAPK/Nf-κB and STATs Regulated Genes. Pharmaceuticals (Basel) 2023; 16:ph16050697. [PMID: 37242480 DOI: 10.3390/ph16050697] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 05/28/2023] Open
Abstract
The pathogenesis of pulmonary fibrosis (PF) is extremely complex and involves numerous intersecting pathways. The successful management of PF may require combining multiple agents. There is a growing body of evidence that suggests the potential benefits of niclosamide (NCL), an FDA-approved anthelminthic drug, in targeting different fibrogenesis molecules. This study aimed at investigating the anti-fibrotic potential of NCL alone and in combination with pirfenidone (PRF), an approved drug for PF, in a bleomycin (BLM) induced PF experimental model. PF was induced in rats by intratracheal BLM administration. The effect of NCL and PRF individually and in combination on different histological and biochemical parameters of fibrosis was investigated. Results revealed that NCL and PRF individually and in combination alleviated the histopathological changes, extracellular matrix deposition and myofibroblastic activation induced by BLM. NCL and PRF either individually or in combination inhibited the oxidative stress and subsequent pathways. They modulated the process of fibrogenesis by inhibiting MAPK/NF-κB and downstream cytokines. They inhibited STATs and downstream survival-related genes including BCL-2, VEGF, HIF-α and IL-6. Combining both drugs showed significant improvement in the tested markers in comparison to the monotherapy. NCL, therefore, has a potential synergistic effect with PRF in reducing the severity of PF.
Collapse
Affiliation(s)
- Hanaa Wanas
- Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, Madinah 41477, Saudi Arabia
- Department of Medical Pharmacology, Faculty of Medicine, Cairo University, Cairo 11956, Egypt
| | - Hossein M Elbadawy
- Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, Madinah 41477, Saudi Arabia
| | - Mohannad A Almikhlafi
- Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, Madinah 41477, Saudi Arabia
| | - Amany E Hamoud
- Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Cairo 11956, Egypt
| | - Eid N Ali
- Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Cairo 11956, Egypt
- Department of Anatomy, Faculty of Medicine, Taibah University, Madinah 41477, Saudi Arabia
| | - Amr M Galal
- Department of Medical Pharmacology, Faculty of Medicine, Cairo University, Cairo 11956, Egypt
| |
Collapse
|
7
|
Michenfelder RT, Delafresnaye L, Truong VX, Barner-Kowollik C, Wagenknecht HA. DNA labelling in live cells via visible light-induced [2+2] photocycloaddition. Chem Commun (Camb) 2023; 59:4012-4015. [PMID: 36920883 DOI: 10.1039/d3cc00817g] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
We introduce a visible light-driven (λmax = 451 nm) photo-chemical strategy for labelling of DNA in living HeLa cells via the [2+2] cycloaddition of a styrylquinoxaline moiety, which we incorporate into both the DNA and the fluorescent label. Our methodology offers advanced opportunities for the mild remote labelling of DNA in water while avoiding UV light activation.
Collapse
Affiliation(s)
- Rita T Michenfelder
- Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 6, Karlsruhe 76131, Germany.
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT), 2 George St, Brisbane QLD 4000, Australia.
| | - Laura Delafresnaye
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT), 2 George St, Brisbane QLD 4000, Australia.
| | - Vinh X Truong
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT), 2 George St, Brisbane QLD 4000, Australia.
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634, Singapore.
| | - Christopher Barner-Kowollik
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT), 2 George St, Brisbane QLD 4000, Australia.
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany.
| | - Hans-Achim Wagenknecht
- Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 6, Karlsruhe 76131, Germany.
| |
Collapse
|
8
|
Schreier HK, Wiehe RS, Ricchetti M, Wiesmüller L. Polymerase ζ is Involved in Mitochondrial DNA Maintenance Processes in Concert with APE1 Activity. Genes (Basel) 2022; 13:genes13050879. [PMID: 35627264 PMCID: PMC9141751 DOI: 10.3390/genes13050879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 01/25/2023] Open
Abstract
Mitochondrial DNA (mtDNA) damaged by reactive oxygen species (ROS) triggers so far poorly understood processes of mtDNA maintenance that are coordinated by a complex interplay among DNA repair, DNA degradation, and DNA replication. This study was designed to identify the proteins involved in mtDNA maintenance by applying a special long-range PCR, reflecting mtDNA integrity in the minor arc. A siRNA screening of literature-based candidates was performed under conditions of enforced oxidative phosphorylation revealing the functional group of polymerases and therein polymerase ζ (POLZ) as top hits. Thus, POLZ knockdown caused mtDNA accumulation, which required the activity of the base excision repair (BER) nuclease APE1, and was followed by compensatory mtDNA replication determined by the single-cell mitochondrial in situ hybridization protocol (mTRIP). Quenching reactive oxygen species (ROS) in mitochondria unveiled an additional, ROS-independent involvement of POLZ in the formation of a typical deletion in the minor arc region. Together with data demonstrating the localization of POLZ in mitochondria, we suggest that POLZ plays a significant role in mtDNA turnover, particularly under conditions of oxidative stress.
Collapse
Affiliation(s)
- Heike Katrin Schreier
- Department of Obstetrics and Gynecology, Ulm University, 89075 Ulm, Germany; (H.K.S.); (R.S.W.)
| | - Rahel Stefanie Wiehe
- Department of Obstetrics and Gynecology, Ulm University, 89075 Ulm, Germany; (H.K.S.); (R.S.W.)
| | - Miria Ricchetti
- Department of Developmental and Stem Cell Biology, Institute Pasteur, CEDEX 15, 75724 Paris, France;
| | - Lisa Wiesmüller
- Department of Obstetrics and Gynecology, Ulm University, 89075 Ulm, Germany; (H.K.S.); (R.S.W.)
- Correspondence:
| |
Collapse
|
9
|
Kang DY, Sp N, Bae SW, Jang KJ. Methylsulfonylmethane relieves cobalt chloride-induced hypoxic toxicity in C2C12 myoblasts. Life Sci 2022; 301:120619. [PMID: 35561750 DOI: 10.1016/j.lfs.2022.120619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/27/2022] [Accepted: 05/04/2022] [Indexed: 11/19/2022]
Abstract
AIMS In biology and medicine, hypoxia refers to reduced oxygen tension or oxygen starvation resulting from various environmental or pathological conditions. Prolonged hypoxia may lead to an imbalance in protein production and a loss of muscle mass in animals. The physiological response to hypoxia includes oxidative stress-induced activation of complex cell-signaling networks such as hypoxia-inducible factor (HIF), phosphoinositide 3-kinase (PI3K), and Janus kinase/signal transducer and activator of transcription (JAK-STAT). Methylsulfonylmethane (MSM) is a natural sulfur compound that regulates HIF-1α expression and provides cytoprotection from oxidative stress. In this study, we explored the anti-hypoxic activity and cytoprotective effect of MSM in cobalt chloride (CoCl2)-induced hypoxic C2C12 mouse myoblast culture. MATERIALS AND METHODS We used western blotting, real time PCR, flow cytometry for molecular signaling studies and we also used MTT assay and ChIP assay along with comet assay for cellular processes. KEY FINDINGS MSM prevented the CoCl2 induced cytotoxicity. Molecular markers of hypoxia, induced by CoCl2, were normalized or reduced by MSM, which also inhibited the effect of CoCl2-induced JAK2/STAT5b/Cyclin D1 and PI3K/AKT signaling. CoCl2-induced oxidative stress results in activation of the NRF2/HO-1-mediated cell survival pathway and inhibition of DNA repair, both of which were prevented by MSM. SIGNIFICANCE We suggest MSM can be considered as a candidate drug for reducing the effects of hypoxia in both animals and humans.
Collapse
Affiliation(s)
- Dong Young Kang
- Department of Pathology, School of Medicine, Institute of Biomedical Science and Technology, Konkuk University, Chungju 27478, Republic of Korea
| | - Nipin Sp
- Department of Pathology, School of Medicine, Institute of Biomedical Science and Technology, Konkuk University, Chungju 27478, Republic of Korea; Department of Surgery, Division of Surgical Oncology, The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA
| | - Se Won Bae
- Department of Chemistry and Cosmetics, Jeju National University, Jeju 63243, Republic of Korea
| | - Kyoung-Jin Jang
- Department of Pathology, School of Medicine, Institute of Biomedical Science and Technology, Konkuk University, Chungju 27478, Republic of Korea.
| |
Collapse
|
10
|
Scaramuzzino L, Lucchino V, Scalise S, Lo Conte M, Zannino C, Sacco A, Biamonte F, Parrotta EI, Costanzo FS, Cuda G. Uncovering the Metabolic and Stress Responses of Human Embryonic Stem Cells to FTH1 Gene Silencing. Cells 2021; 10:2431. [PMID: 34572080 PMCID: PMC8469604 DOI: 10.3390/cells10092431] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/03/2021] [Accepted: 09/13/2021] [Indexed: 12/22/2022] Open
Abstract
Embryonic stem cells (ESCs) are pluripotent cells with indefinite self-renewal ability and differentiation properties. To function properly and maintain genomic stability, ESCs need to be endowed with an efficient repair system as well as effective redox homeostasis. In this study, we investigated different aspects involved in ESCs' response to iron accumulation following stable knockdown of the ferritin heavy chain (FTH1) gene, which encodes for a major iron storage protein with ferroxidase activity. Experimental findings highlight unexpected and, to a certain extent, paradoxical results. If on one hand FTH1 silencing does not correlate with increased ROS production nor with changes in the redox status, strengthening the concept that hESCs are extremely resistant and, to a certain extent, even refractory to intracellular iron imbalance, on the other, the differentiation potential of hESCs seems to be affected and apoptosis is observed. Interestingly, we found that FTH1 silencing is accompanied by a significant activation of the nuclear factor (erythroid-derived-2)-like 2 (Nrf2) signaling pathway and pentose phosphate pathway (PPP), which crosstalk in driving hESCs antioxidant cascade events. These findings shed new light on how hESCs perform under oxidative stress, dissecting the molecular mechanisms through which Nrf2, in combination with PPP, counteracts oxidative injury triggered by FTH1 knockdown.
Collapse
Affiliation(s)
- Luana Scaramuzzino
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
| | - Valeria Lucchino
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
| | - Stefania Scalise
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
| | - Michela Lo Conte
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
| | - Clara Zannino
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
| | - Alessandro Sacco
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
| | - Flavia Biamonte
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
- Center of Interdepartmental Services (CIS), “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
| | | | - Francesco Saverio Costanzo
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
- Center of Interdepartmental Services (CIS), “Magna Graecia” University of Catanzaro, 88100 Catanzaro, Italy
| | - Giovanni Cuda
- Research Centre for Advanced Biochemistry and Molecular Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, 88100 Catanzaro, Italy; (L.S.); (V.L.); (S.S.); (M.L.C.); (C.Z.); (A.S.); (F.B.); (F.S.C.); (G.C.)
| |
Collapse
|
11
|
Huynh GT, Kesarwani V, Walker JA, Frith JE, Meagher L, Corrie SR. Review: Nanomaterials for Reactive Oxygen Species Detection and Monitoring in Biological Environments. Front Chem 2021; 9:728717. [PMID: 34568279 PMCID: PMC8461210 DOI: 10.3389/fchem.2021.728717] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/25/2021] [Indexed: 12/19/2022] Open
Abstract
Reactive oxygen species (ROS) and dissolved oxygen play key roles across many biological processes, and fluorescent stains and dyes are the primary tools used to quantify these species in vitro. However, spatio-temporal monitoring of ROS and dissolved oxygen in biological systems are challenging due to issues including poor photostability, lack of reversibility, and rapid off-site diffusion. In particular, ROS monitoring is hindered by the short lifetime of ROS molecules and their low abundance. The combination of nanomaterials and fluorescent detection has led to new opportunities for development of imaging probes, sensors, and theranostic products, because the scaffolds lead to improved optical properties, tuneable interactions with cells and media, and ratiometric sensing robust to environmental drift. In this review, we aim to critically assess and highlight recent development in nanosensors and nanomaterials used for the detection of oxygen and ROS in biological systems, and their future potential use as diagnosis tools.
Collapse
Affiliation(s)
- Gabriel T. Huynh
- Department of Chemical Engineering, Monash University, Clayton, VIC, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Node, Clayton, VIC, Australia
| | - Vidhishri Kesarwani
- Department of Chemical Engineering, Monash University, Clayton, VIC, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Node, Clayton, VIC, Australia
| | - Julia A. Walker
- Department of Chemical Engineering, Monash University, Clayton, VIC, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Node, Clayton, VIC, Australia
| | - Jessica E. Frith
- Monash Institute of Medical Engineering, Monash University, Clayton, VIC, Australia
- Department of Material Science and Engineering, Monash University, Clayton, VIC, Australia
- ARC Training Centre for Cell and Tissue Engineering Technologies, Monash University, Clayton, VIC, Australia
| | - Laurence Meagher
- Department of Material Science and Engineering, Monash University, Clayton, VIC, Australia
- ARC Training Centre for Cell and Tissue Engineering Technologies, Monash University, Clayton, VIC, Australia
| | - Simon R. Corrie
- Department of Chemical Engineering, Monash University, Clayton, VIC, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Node, Clayton, VIC, Australia
- ARC Training Centre for Cell and Tissue Engineering Technologies, Monash University, Clayton, VIC, Australia
| |
Collapse
|
12
|
Ghosh S, Dutta N, Banerjee P, Gajbhiye RL, Sareng HR, Kapse P, Pal S, Burdelya L, Mandal NC, Ravichandiran V, Bhattacharjee A, Kundu GC, Gudkov AV, Pal M. Induction of monoamine oxidase A-mediated oxidative stress and impairment of NRF2-antioxidant defence response by polyphenol-rich fraction of Bergenia ligulata sensitizes prostate cancer cells in vitro and in vivo. Free Radic Biol Med 2021; 172:136-151. [PMID: 34097996 DOI: 10.1016/j.freeradbiomed.2021.05.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 05/14/2021] [Accepted: 05/27/2021] [Indexed: 12/13/2022]
Abstract
Prostate cancer (PCa) is a major cause of mortality and morbidity in men. Available therapies yield limited outcome. We explored anti-PCa activity in a polyphenol-rich fraction of Bergenia ligulata (PFBL), a plant used in Indian traditional and folk medicine for its anti-inflammatory and antineoplastic properties. PFBL constituted of about fifteen different compounds as per LCMS analysis induced apoptotic death in both androgen-dependent LNCaP and androgen-refractory PC3 and DU145 cells with little effect on NKE and WI38 cells. Further investigation revealed that PFBL mediates its function through upregulating ROS production by enhanced catalytic activity of Monoamine oxidase A (MAO-A). Notably, the differential inactivation of NRF2-antioxidant response pathway by PFBL resulted in death in PC3 versus NKE cells involving GSK-3β activity facilitated by AKT inhibition. PFBL efficiently reduced the PC3-tumor xenograft in NOD-SCID mice alone and in synergy with Paclitaxel. Tumor tissues in PFBL-treated mice showed upregulation of similar mechanism of cell death as observed in isolated PC3 cells i.e., elevation of MAO-A catalytic activity, ROS production accompanied by activation of β-TrCP-GSK-3β axis of NRF2 degradation. Blood counts, liver, and splenocyte sensitivity analyses justified the PFBL safety in the healthy mice. To our knowledge this is the first report of an activity that crippled NRF2 activation both in vitro and in vivo in response to MAO-A activation. Results of this study suggest the development of a novel treatment protocol utilizing PFBL to improve therapeutic outcome for patients with aggressive PCa which claims hundreds of thousands of lives each year.
Collapse
Affiliation(s)
- Suvranil Ghosh
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Naibedya Dutta
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Pinaki Banerjee
- Laboratory of Tumor Biology, Angiogenesis and Nanomedicine Research, National Center for Cell Science, Savitribai Phule Pune University Campus, Pune, India
| | - Rahul L Gajbhiye
- National Institute of Pharmaceutical Education and Research (NIPER), Hajipur, India
| | | | - Prachi Kapse
- Laboratory of Tumor Biology, Angiogenesis and Nanomedicine Research, National Center for Cell Science, Savitribai Phule Pune University Campus, Pune, India
| | - Srabani Pal
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Lyudmila Burdelya
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | | | - Velyutham Ravichandiran
- National Institute of Pharmaceutical Education and Research (NIPER), Hajipur, India; National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | | | - Gopal C Kundu
- Laboratory of Tumor Biology, Angiogenesis and Nanomedicine Research, National Center for Cell Science, Savitribai Phule Pune University Campus, Pune, India
| | - Andrei V Gudkov
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Mahadeb Pal
- Division of Molecular Medicine, Bose Institute, Kolkata, India.
| |
Collapse
|
13
|
Hashim M, Ahmad B, Drouet S, Hano C, Abbasi BH, Anjum S. Comparative Effects of Different Light Sources on the Production of Key Secondary Metabolites in Plants In Vitro Cultures. PLANTS (BASEL, SWITZERLAND) 2021; 10:1521. [PMID: 34451566 PMCID: PMC8398697 DOI: 10.3390/plants10081521] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/18/2021] [Accepted: 07/23/2021] [Indexed: 05/13/2023]
Abstract
Plant secondary metabolites are known to have a variety of biological activities beneficial to human health. They are becoming more popular as a result of their unique features and account for a major portion of the pharmacological industry. However, obtaining secondary metabolites directly from wild plants has substantial drawbacks, such as taking a long time, posing a risk of species extinction owing to over-exploitation, and producing a limited quantity. Thus, there is a paradigm shift towards the employment of plant tissue culture techniques for the production of key secondary metabolites in vitro. Elicitation appears to be a viable method for increasing phytochemical content and improving the quality of medicinal plants and fruits and vegetables. In vitro culture elicitation activates the plant's defense response and increases the synthesis of secondary metabolites in larger proportions, which are helpful for therapeutic purposes. In this respect, light has emerged as a unique and efficient elicitor for enhancing the in vitro production of pharmacologically important secondary metabolites. Various types of light (UV, fluorescent, and LEDs) have been found as elicitors of secondary metabolites, which are described in this review.
Collapse
Affiliation(s)
- Mariam Hashim
- Department of Biotechnology, Kinnaird College for Women, Jail Road, Lahore 54000, Pakistan;
| | - Bushra Ahmad
- Shaheed Benazir Bhutto Women University, Peshawar 25000, Pakistan;
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRAE USC1328, Eure & Loir Campus, University of Orleans, 28000 Chartres, France; (S.D.); (C.H.)
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRAE USC1328, Eure & Loir Campus, University of Orleans, 28000 Chartres, France; (S.D.); (C.H.)
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 15320, Pakistan;
| | - Sumaira Anjum
- Department of Biotechnology, Kinnaird College for Women, Jail Road, Lahore 54000, Pakistan;
| |
Collapse
|
14
|
Mehibel M, Xu Y, Li CG, Moon EJ, Thakkar KN, Diep AN, Kim RK, Bloomstein JD, Xiao Y, Bacal J, Saldivar JC, Le QT, Cimprich KA, Rankin EB, Giaccia AJ. Eliminating hypoxic tumor cells improves response to PARP inhibitors in homologous recombination-deficient cancer models. J Clin Invest 2021; 131:146256. [PMID: 34060485 PMCID: PMC8266208 DOI: 10.1172/jci146256] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 04/21/2021] [Indexed: 12/21/2022] Open
Abstract
Hypoxia, a hallmark feature of the tumor microenvironment, causes resistance to conventional chemotherapy, but was recently reported to synergize with poly(ADP-ribose) polymerase inhibitors (PARPis) in homologous recombination-proficient (HR-proficient) cells through suppression of HR. While this synergistic killing occurs under severe hypoxia (<0.5% oxygen), our study shows that moderate hypoxia (2% oxygen) instead promotes PARPi resistance in both HR-proficient and -deficient cancer cells. Mechanistically, we identify reduced ROS-induced DNA damage as the cause for the observed resistance. To determine the contribution of hypoxia to PARPi resistance in tumors, we used the hypoxic cytotoxin tirapazamine to selectively kill hypoxic tumor cells. We found that the selective elimination of hypoxic tumor cells led to a substantial antitumor response when used with PARPi compared with that in tumors treated with PARPi alone, without enhancing normal tissue toxicity. Since human breast cancers with BRAC1/2 mutations have an increased hypoxia signature and hypoxia reduces the efficacy of PARPi, then eliminating hypoxic tumor cells should enhance the efficacy of PARPi therapy.
Collapse
Affiliation(s)
- Manal Mehibel
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Yu Xu
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Caiyun G. Li
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Eui Jung Moon
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Kaushik N. Thakkar
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Anh N. Diep
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Ryan K. Kim
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Joshua D. Bloomstein
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Yiren Xiao
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Julien Bacal
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, California, USA
| | - Joshua C. Saldivar
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, California, USA
| | - Quynh-Thu Le
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
| | - Karlene A. Cimprich
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, California, USA
| | - Erinn B. Rankin
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
- Department of Obstetrics and Gynecology, Stanford University Medical Center, Stanford, California, USA
| | - Amato J. Giaccia
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
- Oxford Institute for Radiation Oncology, University of Oxford, Oxford, United Kingdom
| |
Collapse
|
15
|
Othmène YB, Salem IB, Hamdi H, Annabi E, Abid-Essefi S. Tebuconazole induced cytotoxic and genotoxic effects in HCT116 cells through ROS generation. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 174:104797. [PMID: 33838701 DOI: 10.1016/j.pestbp.2021.104797] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/24/2020] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Tebuconazole (TEB) is a common triazole fungicide that has been widely used for the control of plant pathogenic fungi, suggesting that mammal exposure occurs regularly. Several studies demonstrated that TEB exposure has been linked to a variety of toxic effects, including neurotoxicity, immunotoxicity, reprotoxicity and carcinogenicity. However, there is a few available data regarding the molecular mechanism involved in TEB-induced toxicity. The current study was undertaken to investigate the toxic effects of TEB in HCT116 cells. Our results showed that TEB caused cytotoxicity by inhibiting cell viability as assessed by the MTT assay. Furthermore, we have demonstrated that TEB induced a significant increase in the reactive oxygen species (ROS) production leading to the induction of lipid peroxidation and DNA fragmentation and increased superoxide dismutase (SOD) and catalase (CAT) activities. Moreover, TEB exposure induced mitochondrial membrane potential loss and caspase-9/-3 activation. Treatment with general caspases inhibitor (Z-VAD-fmk) significantly prevented the TEB-induced cell death, indicating that TEB induced caspases-dependent cell death. These findings suggest the involvement of oxidative stress and apoptosis in TEB-induced toxicity in HCT116.
Collapse
Affiliation(s)
- Yosra Ben Othmène
- University of Monastir, Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds, LR01SE17, Avicenne Street, 5000 Monastir, Tunisia; Higher Institute of Biotechnology, University of Monastir, Taher Haddad Street, 5000, Monastie, Tunisia
| | - Intidhar Ben Salem
- University of Monastir, Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds, LR01SE17, Avicenne Street, 5000 Monastir, Tunisia; Higher Institute of Biotechnology, University of Monastir, Taher Haddad Street, 5000, Monastie, Tunisia; University of Sousse, Faculty of Medicine of Sousse, 4000, Tunisia
| | - Hiba Hamdi
- University of Monastir, Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds, LR01SE17, Avicenne Street, 5000 Monastir, Tunisia; Higher Institute of Biotechnology, University of Monastir, Taher Haddad Street, 5000, Monastie, Tunisia
| | - Emna Annabi
- University of Monastir, Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds, LR01SE17, Avicenne Street, 5000 Monastir, Tunisia; Higher Institute of Biotechnology, University of Monastir, Taher Haddad Street, 5000, Monastie, Tunisia
| | - Salwa Abid-Essefi
- University of Monastir, Faculty of Dental Medicine, Laboratory for Research on Biologically Compatible Compounds, LR01SE17, Avicenne Street, 5000 Monastir, Tunisia; Higher Institute of Biotechnology, University of Monastir, Taher Haddad Street, 5000, Monastie, Tunisia.
| |
Collapse
|
16
|
5-Hydroxytryptamine Modulates Maturation and Mitochondria Function of Human Oligodendrocyte Progenitor M03-13 Cells. Int J Mol Sci 2021; 22:ijms22052621. [PMID: 33807720 PMCID: PMC7962057 DOI: 10.3390/ijms22052621] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/26/2021] [Accepted: 03/01/2021] [Indexed: 01/07/2023] Open
Abstract
Inside the adult CNS, oligodendrocyte progenitor cells (OPCS) are able to proliferate, migrate and differentiate into mature oligodendrocytes (OLs) which are responsible for the production of myelin sheet and energy supply for neurons. Moreover, in demyelinating diseases, OPCs are recruited to the lesion areas where they undergo differentiation and myelin synthesis. Serotonin (5-hydroxytryptamine, 5-HT) is involved in OLs’ development and myelination, but so far the molecular mechanisms involved or the effects of 5-HT on mitochondria function have not yet been well documented. Our data show that 5-HT inhibits migration and proliferation committing cells toward differentiation in an immortalized human oligodendrocyte precursor cell line, M03-13. Migration blockage is mediated by reactive oxygen species (ROS) generation since antioxidants, such as Vit C and Cu-Zn superoxide dismutase, prevent the inhibitory effects of 5-HT on cell migration. 5-HT inhibits OPC migration and proliferation and increases OL phenotypic markers myelin basic protein (MBP) and Olig-2 via protein kinase C (PKC) activation since the inhibitor of PKC, bis-indolyl-maleimide (BIM), counteracts 5-HT effects. NOX inhibitors as well, reverse the effects of 5-HT, indicating that 5-HT influences the maturation process of OPCs by NOX-dependent ROS production. Finally, 5-HT increases mitochondria function and antioxidant activity. The identification of the molecular mechanisms underlying the effects of 5-HT on maturation and energy metabolism of OPCs could pave the way for the development of new treatments for autoimmune demyelinating diseases such as Multiple Sclerosis where oligodendrocytes are the primary target of immune attack.
Collapse
|
17
|
Shah M, Jan H, Drouet S, Tungmunnithum D, Shirazi JH, Hano C, Abbasi BH. Chitosan Elicitation Impacts Flavonolignan Biosynthesis in Silybum marianum (L.) Gaertn Cell Suspension and Enhances Antioxidant and Anti-Inflammatory Activities of Cell Extracts. Molecules 2021; 26:791. [PMID: 33546424 PMCID: PMC7913645 DOI: 10.3390/molecules26040791] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 01/03/2023] Open
Abstract
Silybum marianum (L.) Gaertn is a rich source of antioxidants and anti-inflammatory flavonolignans with great potential for use in pharmaceutical and cosmetic products. Its biotechnological production using in vitro culture system has been proposed. Chitosan is a well-known elicitor that strongly affects both secondary metabolites and biomass production by plants. The effect of chitosan on S. marianum cell suspension is not known yet. In the present study, suspension cultures of S. marianum were exploited for their in vitro potential to produce bioactive flavonolignans in the presence of chitosan. Established cell suspension cultures were maintained on the same hormonal media supplemented with 0.5 mg/L BAP (6-benzylaminopurine) and 1.0 mg/L NAA (α-naphthalene acetic acid) under photoperiod 16/8 h (light/dark) and exposed to various treatments of chitosan (ranging from 0.5 to 50.0 mg/L). The highest biomass production was observed for cell suspension treated with 5.0 mg/L chitosan, resulting in 123.3 ± 1.7 g/L fresh weight (FW) and 17.7 ± 0.5 g/L dry weight (DW) productions. All chitosan treatments resulted in an overall increase in the accumulation of total flavonoids (5.0 ± 0.1 mg/g DW for 5.0 mg/L chitosan), total phenolic compounds (11.0 ± 0.2 mg/g DW for 0.5 mg/L chitosan) and silymarin (9.9 ± 0.5 mg/g DW for 0.5 mg/L chitosan). In particular, higher accumulation levels of silybin B (6.3 ± 0.2 mg/g DW), silybin A (1.2 ± 0.1 mg/g DW) and silydianin (1.0 ± 0.0 mg/g DW) were recorded for 0.5 mg/L chitosan. The corresponding extracts displayed enhanced antioxidant and anti-inflammatory capacities: in particular, high ABTS antioxidant activity (741.5 ± 4.4 μM Trolox C equivalent antioxidant capacity) was recorded in extracts obtained in presence of 0.5 mg/L of chitosan, whereas highest inhibitions of cyclooxygenase 2 (COX-2, 30.5 ± 1.3 %), secretory phospholipase A2 (sPLA2, 33.9 ± 1.3 %) and 15-lipoxygenase (15-LOX-2, 31.6 ± 1.2 %) enzymes involved in inflammation process were measured in extracts obtained in the presence of 5.0 mg/L of chitosan. Taken together, these results highlight the high potential of the chitosan elicitation in the S. marianum cell suspension for enhanced production of antioxidant and anti-inflammatory silymarin-rich extracts.
Collapse
Affiliation(s)
- Muzamil Shah
- Department of Biotechnology, Quaid-i-Azam University, Islamabad-45320, Pakistan; (M.S.); (H.J.)
| | - Hasnain Jan
- Department of Biotechnology, Quaid-i-Azam University, Islamabad-45320, Pakistan; (M.S.); (H.J.)
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), University of Orleans, INRAE USC1328, F28000 Chartres, France;
| | - Duangjai Tungmunnithum
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayuthaya Road, Rajathevi, Bangkok 10400, Thailand;
| | - Jafir Hussain Shirazi
- Department of Pharmacy, Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), University of Orleans, INRAE USC1328, F28000 Chartres, France;
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad-45320, Pakistan; (M.S.); (H.J.)
| |
Collapse
|
18
|
Gnanavel M, Murugesan A, Konda Mani S, Yli-Harja O, Kandhavelu M. Identifying the miRNA Signature Association with Aging-Related Senescence in Glioblastoma. Int J Mol Sci 2021; 22:ijms22020517. [PMID: 33419230 PMCID: PMC7825621 DOI: 10.3390/ijms22020517] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 12/30/2020] [Accepted: 01/04/2021] [Indexed: 12/13/2022] Open
Abstract
Glioblastoma (GBM) is the most common malignant brain tumor and its malignant phenotypic characteristics are classified as grade IV tumors. Molecular interactions, such as protein–protein, protein–ncRNA, and protein–peptide interactions are crucial to transfer the signaling communications in cellular signaling pathways. Evidences suggest that signaling pathways of stem cells are also activated, which helps the propagation of GBM. Hence, it is important to identify a common signaling pathway that could be visible from multiple GBM gene expression data. microRNA signaling is considered important in GBM signaling, which needs further validation. We performed a high-throughput analysis using micro array expression profiles from 574 samples to explore the role of non-coding RNAs in the disease progression and unique signaling communication in GBM. A series of computational methods involving miRNA expression, gene ontology (GO) based gene enrichment, pathway mapping, and annotation from metabolic pathways databases, and network analysis were used for the analysis. Our study revealed the physiological roles of many known and novel miRNAs in cancer signaling, especially concerning signaling in cancer progression and proliferation. Overall, the results revealed a strong connection with stress induced senescence, significant miRNA targets for cell cycle arrest, and many common signaling pathways to GBM in the network.
Collapse
Affiliation(s)
- Mutharasu Gnanavel
- BioMediTech Institute, Faculty of Medicine and Health Technology, Tampere University, ArvoYlpönkatu 34, 33520 Tampere, Finland; (M.G.); (A.M.); (O.Y.-H.)
| | - Akshaya Murugesan
- BioMediTech Institute, Faculty of Medicine and Health Technology, Tampere University, ArvoYlpönkatu 34, 33520 Tampere, Finland; (M.G.); (A.M.); (O.Y.-H.)
- Molecular Signalling Lab, Faculty of Medicine and Health Technology, Tampere University, P.O. Box 553, 33101 Tampere, Finland
- Department of Biotechnology, Lady Doak College, Thallakulam, Madurai 625002, India
| | - Saravanan Konda Mani
- Center for High Performance Computing, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
| | - Olli Yli-Harja
- BioMediTech Institute, Faculty of Medicine and Health Technology, Tampere University, ArvoYlpönkatu 34, 33520 Tampere, Finland; (M.G.); (A.M.); (O.Y.-H.)
- Computational Systems Biology Group, Faculty of Medicine and Health Technology, Tampere University, P.O. Box 553, 33101 Tampere, Finland
- Institute for Systems Biology, 1441N 34th Street, Seattle, WA 98109, USA
| | - Meenakshisundaram Kandhavelu
- BioMediTech Institute, Faculty of Medicine and Health Technology, Tampere University, ArvoYlpönkatu 34, 33520 Tampere, Finland; (M.G.); (A.M.); (O.Y.-H.)
- Molecular Signalling Lab, Faculty of Medicine and Health Technology, Tampere University, P.O. Box 553, 33101 Tampere, Finland
- Science Center, Tampere University Hospital, ArvoYlpönkatu 34, 33520 Tampere, Finland
- Correspondence:
| |
Collapse
|
19
|
Khurshid R, Ullah MA, Tungmunnithum D, Drouet S, Shah M, Zaeem A, Hameed S, Hano C, Abbasi BH. Lights triggered differential accumulation of antioxidant and antidiabetic secondary metabolites in callus culture of Eclipta alba L. PLoS One 2020; 15:e0233963. [PMID: 32530961 PMCID: PMC7292357 DOI: 10.1371/journal.pone.0233963] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 05/15/2020] [Indexed: 12/17/2022] Open
Abstract
Eclipta alba L., also known as false daisy, is well known and commercially attractive plant with excellent hepatotoxic and antidiabetic activities. Light is considered a key modulator in plant morphogenesis and survival by regulating important physiological cascades. Current study was carried out to investigate growth and developmental aspects of E. alba under differential effect of multispectral lights. In vitro derived callus culture of E. alba was exposed to multispectral monochromatic lights under controlled aseptic conditions. Maximum dry weight was recorded in culture grown under red light (11.2 g/L) whereas negative effect was observed under exposure of yellow light on callus growth (4.87 g/L). Furthermore, red light significantly enhanced phenolics and flavonoids content (TPC: 57.8 mg/g, TFC: 11.1 mg/g) in callus cultures compared to rest of lights. HPLC analysis further confirmed highest accumulation of four major compounds i.e. coumarin (1.26 mg/g), eclalbatin (5.00 mg/g), wedelolactone (32.54 mg/g) and demethylwedelolactone (23.67 mg/g) and two minor compounds (β-amyrin: 0.38 mg/g, luteolin: 0.39 mg/g) in red light treated culture whereas stigmasterol was found optimum (0.22 mg/g) under blue light. In vitro based biological activities including antioxidant, antidiabetic and lipase inhibitory assays showed optimum values in cultures exposed to red light, suggesting crucial role of these phytochemicals in the enhancement of the therapeutic potential of E. alba. These results clearly revealed that the use of multispectral lights in in vitro cultures could be an effective strategy for enhanced production of phytochemicals.
Collapse
Affiliation(s)
- Razia Khurshid
- Department of Biotechnology, Quaid-i-Azam University, Islamabad, Pakistan
| | | | - Duangjai Tungmunnithum
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d’Orléans, Orléans, France
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, Rajathevi, Bangkok, Thailand
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d’Orléans, Orléans, France
- COSM’ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, Orléans, France
| | - Muzamil Shah
- Department of Biotechnology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Afifa Zaeem
- Department of Biotechnology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Safia Hameed
- Department of Biotechnology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d’Orléans, Orléans, France
- COSM’ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, Orléans, France
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad, Pakistan
- * E-mail:
| |
Collapse
|
20
|
The Anticancer Drug 3-Bromopyruvate Induces DNA Damage Potentially Through Reactive Oxygen Species in Yeast and in Human Cancer Cells. Cells 2020; 9:cells9051161. [PMID: 32397119 PMCID: PMC7290944 DOI: 10.3390/cells9051161] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 05/05/2020] [Accepted: 05/06/2020] [Indexed: 12/13/2022] Open
Abstract
3-bromopyruvate (3-BP) is a small molecule with anticancer and antimicrobial activities. 3-BP is taken up selectively by cancer cells’ mono-carboxylate transporters (MCTs), which are highly overexpressed by many cancers. When 3-BP enters cancer cells it inactivates several glycolytic and mitochondrial enzymes, leading to ATP depletion and the generation of reactive oxygen species. While mechanisms of 3-BP uptake and its influence on cell metabolism are well understood, the impact of 3-BP at certain concentrations on DNA integrity has never been investigated in detail. Here we have collected several lines of evidence suggesting that 3-BP induces DNA damage probably as a result of ROS generation, in both yeast and human cancer cells, when its concentration is sufficiently low and most cells are still viable. We also demonstrate that in yeast 3-BP treatment leads to generation of DNA double-strand breaks only in S-phase of the cell cycle, possibly as a result of oxidative DNA damage. This leads to DNA damage, checkpoint activation and focal accumulation of the DNA response proteins. Interestingly, in human cancer cells exposure to 3-BP also induces DNA breaks that trigger H2A.X phosphorylation. Our current data shed new light on the mechanisms by which a sufficiently low concentration of 3-BP can induce cytotoxicity at the DNA level, a finding that might be important for the future design of anticancer therapies.
Collapse
|
21
|
Usman H, Ullah MA, Jan H, Siddiquah A, Drouet S, Anjum S, Giglioli-Guviarc’h N, Hano C, Abbasi BH. Interactive Effects of Wide-Spectrum Monochromatic Lights on Phytochemical Production, Antioxidant and Biological Activities of Solanum xanthocarpum Callus Cultures. Molecules 2020; 25:E2201. [PMID: 32397194 PMCID: PMC7248882 DOI: 10.3390/molecules25092201] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/31/2020] [Accepted: 03/31/2020] [Indexed: 02/06/2023] Open
Abstract
Solanum xanthocarpum is considered an important traditional medicinal herb because of its unique antioxidant, and anti-diabetic, anti-aging, and anti-inflammatory potential. Because of the over exploitation linked to its medicinal properties as well as destruction of its natural habitat, S. xanthocarpum is now becoming endangered and its supply is limited. Plant in vitro culture and elicitation are attractive alternative strategies to produce biomass and stimulate biosynthesis of medicinally important phytochemicals. Here, we investigated the potential influence of seven different monochromatic light treatments on biomass and secondary metabolites accumulation in callus culture of S. xanthocarpum as well as associated biological activities of the corresponding extracts. Among different light treatments, highest biomass accumulation was observed in white light-treated callus culture. Optimum accumulation of total flavonoid contents (TFC) and total phenolic contents (TPC) were observed in callus culture kept under continuous white and blue light respectively than control. Quantification of phytochemicals through HPLC revealed that optimum production of caffeic acid (0.57 ± 0.06 mg/g DW), methyl-caffeate (17.19 mg/g ± 1.79 DW), scopoletin (2.28 ± 0.13 mg/g DW), and esculetin (0.68 ± 0.07 mg/g DW) was observed under blue light callus cultures. Compared to the classic photoperiod condition, caffeic acid, methyl-caffeate, scopoletin, and esculetin were accumulated 1.7, 2.5, 1.1, and 1.09-folds higher, respectively. Moreover, high in vitro cell free antioxidant, anti-diabetic, anti-aging, and anti-inflammatory activities were closely associated with the production of these secondary metabolites. These results clearly showed the interest to apply multispectral light as elicitor of in vitro callus cultures S. xanthocarpum to promote the production of important phytochemicals, and allow us to propose this system as an alternative for the collection of this endangered species from the wild.
Collapse
Affiliation(s)
- Hazrat Usman
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (H.U.); (M.A.U.); (H.J.); (A.S.)
| | - Muhammad Asad Ullah
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (H.U.); (M.A.U.); (H.J.); (A.S.)
| | - Hasnain Jan
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (H.U.); (M.A.U.); (H.J.); (A.S.)
| | - Aisha Siddiquah
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (H.U.); (M.A.U.); (H.J.); (A.S.)
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328 Unversité ď, CEDEX 2, 45067 Orléans, France;
- COSMACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, CEDEX 2, 4506 Orléans, France
| | - Sumaira Anjum
- Department of Biotechnology, Kinnaird College for Women, Lahore 54000, Pakistan;
| | | | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328 Unversité ď, CEDEX 2, 45067 Orléans, France;
- COSMACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, CEDEX 2, 4506 Orléans, France
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; (H.U.); (M.A.U.); (H.J.); (A.S.)
| |
Collapse
|
22
|
Lochab S, Singh Y, Sengupta S, Nandicoori VK. Mycobacterium tuberculosis exploits host ATM kinase for survival advantage through SecA2 secretome. eLife 2020; 9:51466. [PMID: 32223892 PMCID: PMC7162654 DOI: 10.7554/elife.51466] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 03/27/2020] [Indexed: 11/13/2022] Open
Abstract
(Mtb) produces inflections in the host signaling networks to create a favorable milieu for survival. The virulent Mtb strain, Rv caused double strand breaks (DSBs), whereas the non-virulent Ra strain triggered single-stranded DNA generation. The effectors secreted by SecA2 pathway were essential and adequate for the genesis of DSBs. Accumulation of DSBs mediated through Rv activates ATM-Chk2 pathway of DNA damage response (DDR) signaling, resulting in altered cell cycle. Instead of the classical ATM-Chk2 DDR, Mtb gains survival advantage through ATM-Akt signaling cascade. Notably, in vivo infection with Mtb led to sustained DSBs and ATM activation during chronic phase of tuberculosis. Addition of ATM inhibitor enhances isoniazid mediated Mtb clearance in macrophages as well as in murine infection model, suggesting its utility for host directed adjunct therapy. Collectively, data suggests that DSBs inflicted by SecA2 secretome of Mtb provides survival niche through activation of ATM kinase.
Collapse
Affiliation(s)
- Savita Lochab
- National Institute of Immunology, New Delhi, India.,Department of Zoology, University of Delhi, New Delhi, India
| | - Yogendra Singh
- Department of Zoology, University of Delhi, New Delhi, India
| | | | | |
Collapse
|
23
|
Tang ZM, Liu YY, Ni DL, Zhou JJ, Zhang M, Zhao PR, Lv B, Wang H, Jin DY, Bu WB. Biodegradable Nanoprodrugs: "Delivering" ROS to Cancer Cells for Molecular Dynamic Therapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1904011. [PMID: 31793717 DOI: 10.1002/adma.201904011] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 11/15/2019] [Indexed: 06/10/2023]
Abstract
Biodegradable nanoprodrugs, inheriting the antitumor effects of chemotherapy drugs and overcoming the inevitable drawback of side effects on normal tissues, hold promise as next-generation cancer therapy candidates. Biodegradable nanoprodrugs of transferrin-modified MgO2 nanosheets are developed to selectively deliver reactive oxygen species to cancer cells for molecular dynamic therapy strategy. The nanosheets favor the acidic and low catalase activity tumor microenvironment to react with proton and release nontoxic Mg2+ . This reaction simultaneously produces abundant H2 O2 to induce cell death and damage the structure of transferrin to release Fe3+ , which will react with H2 O2 to produce highly toxic ·OH to kill tumor cells.
Collapse
Affiliation(s)
- Zhong-Min Tang
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, 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
| | - Yan-Yan Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China
| | - Da-Long Ni
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Jia-Jia Zhou
- Institute for Biomedical Materials and Devices, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Meng Zhang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Pei-Ran Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China
| | - Bin Lv
- Department of Radiotherapy, Huadong Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Han Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Da-Yong Jin
- Institute for Biomedical Materials and Devices, Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Wen-Bo Bu
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, 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
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China
| |
Collapse
|
24
|
Ullah MA, Tungmunnithum D, Garros L, Hano C, Abbasi BH. Monochromatic lights-induced trends in antioxidant and antidiabetic polyphenol accumulation in in vitro callus cultures of Lepidium sativum L. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 196:111505. [PMID: 31129506 DOI: 10.1016/j.jphotobiol.2019.05.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 04/29/2019] [Accepted: 05/03/2019] [Indexed: 12/29/2022]
Abstract
Lepidium sativum L. is an important edible, herbaceous plant with huge medicinal value as cardio-protective, hepatoprotective and antitumor agent. This study was designed and performed to investigate biosynthesis of plant's active ingredients in callus cultures of L. sativum in response to the exposure of multi spectral lights. Optimum biomass accumulation (15.36 g/L DW), total phenolic and flavonoid contents (TPC; 47.43 mg/g; TFC; 9.41 mg/g) were recorded in calli placed under white light (24 h) compared to rest of the treatments. Antioxidant enzymatic activities i.e. superoxide dismutase and peroxidase were found optimum in cultures exposed to green light (SOD; 0.054 nM/min/mg FW, POD; 0.501 nM/min/mg FW). Phytochemical analysis further confirmed the potential influence of white light exposure on enhanced production of plant's metabolites. Significant enhancement level of major metabolic compounds such as chlorogenic acid (7.20 mg/g DW), quercetin (22.08 mg/g DW), kaempferol (7.77 mg/g DW) and minor compounds including ferulic acid, sinapic acid, protocatechuic acid, vanillic acid and caffeic acid were recorded in white light compared to control (photoperiod), whereas blue light increased the p-coumaric acid accumulation. Moreover, callus cultures of this plant under white light (24 h) showed highest in vitro based anti-diabetic and antioxidant activities compared to other conditions. Finding of our current study revealed that multi spectral lights are proved to be an effective strategy for enhancing metabolic quantity of antioxidant and anti-diabetic bioactive compounds in callus cultures of L. sativum L.
Collapse
Affiliation(s)
- Muhammad Asad Ullah
- Department of Biotechnology, Quaid-i -Azam University, Islamabad 45320, Pakistan
| | - Duangjai Tungmunnithum
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans Cedex 2, France; Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayuthaya Road, Rajathevi, Bangkok 10400, Thailand
| | - Laurine Garros
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans Cedex 2, France; Institut de Chimie Organique et Analytique (ICOA) UMR7311, Université d'Orléans-CNRS, 45067 Orléans Cedex 2, France; COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans Cedex 2, France
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans Cedex 2, France; COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans Cedex 2, France
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i -Azam University, Islamabad 45320, Pakistan; Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans Cedex 2, France; COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans Cedex 2, France; EA2106 Biomolecules et Biotechnologies Vegetales, Universite Francois-Rabelais de Tours, Tours, France.
| |
Collapse
|
25
|
Ullah MA, Tungmunnithum D, Garros L, Drouet S, Hano C, Abbasi BH. Effect of Ultraviolet-C Radiation and Melatonin Stress on Biosynthesis of Antioxidant and Antidiabetic Metabolites Produced in In Vitro Callus Cultures of Lepidium sativum L. Int J Mol Sci 2019; 20:E1787. [PMID: 30978911 PMCID: PMC6479895 DOI: 10.3390/ijms20071787] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 02/06/2023] Open
Abstract
Lepidium sativum L. is a rich source of polyphenols that have huge medicinal and pharmaceutical applications. In the current study, an effective abiotic elicitation strategy was designed for enhanced biosynthesis of polyphenols in callus culture of L. sativum. Callus was exposed to UV-C radiations for different time intervals and various concentrations of melatonin. Secondary metabolites were quantified by using high-performance liquid chromatography (HPLC). Results indicated the total secondary metabolite accumulation of nine quantified compounds was almost three fold higher (36.36 mg/g dry weight (DW)) in melatonin (20 μM) treated cultures, whereas, in response to UV-C (60 min), a 2.5 fold increase (32.33 mg/g DW) was recorded compared to control (13.94 mg/g DW). Metabolic profiling revealed the presence of three major phytochemicals, i.e., chlorogenic acid, kaemferol, and quercetin, in callus culture of L. sativum. Furthermore, antioxidant, antidiabetic, and enzymatic activities of callus cultures were significantly enhanced. Maximum antidiabetic activities (α-glucosidase: 57.84%; α-amylase: 62.66%) were recorded in melatonin (20 μM) treated callus cultures. Overall, melatonin proved to be an effect elicitor compared to UV-C and a positive correlation in these biological activities and phytochemical accumulation was observed. The present study provides a better comparison of both elicitors and their role in the initiation of physiological pathways for enhanced metabolites biosynthesis in vitro callus culture of L. sativum.
Collapse
Affiliation(s)
- Muhammad Asad Ullah
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan.
| | - Duangjai Tungmunnithum
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayuthaya Road, Rajathevi, Bangkok 10400, Thailand.
| | - Laurine Garros
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- Institut de Chimie Organique et Analytique (ICOA) UMR7311, Université d'Orléans-CNRS, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan.
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
- EA2106 Biomolécules et Biotechnologies Végétales, Université de Tours, 37000 Tours, France.
| |
Collapse
|
26
|
Shah M, Ullah MA, Drouet S, Younas M, Tungmunnithum D, Giglioli-Guivarc'h N, Hano C, Abbasi BH. Interactive Effects of Light and Melatonin on Biosynthesis of Silymarin and Anti-Inflammatory Potential in Callus Cultures of Silybum marianum (L.) Gaertn. Molecules 2019; 24:E1207. [PMID: 30934786 PMCID: PMC6480540 DOI: 10.3390/molecules24071207] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/21/2019] [Accepted: 03/27/2019] [Indexed: 12/26/2022] Open
Abstract
Silybum marianum (L.) Gaertn. is a well-known medicinal herb, primarily used in liver protection. Light strongly affects several physiological processes along with secondary metabolites biosynthesis in plants. Herein, S. marianum was exploited for in vitro potential under different light regimes in the presence of melatonin. The optimal callogenic response occurred in the combination of 1.0 mg/L α-naphthalene acetic acid and 0.5 mg/L 6-benzylaminopurine under photoperiod. Continuous light associated with melatonin treatment increased total flavonoid content (TFC), total phenolic content (TPC) and antioxidant potential, followed by photoperiod and dark treatments. The increased level of melatonin has a synergistic effect on biomass accumulation under continuous light and photoperiod, while an adverse effect was observed under dark conditions. More detailed phytochemical analysis showed maximum total silymarin content (11.92 mg/g dry weight (DW)) when placed under continuous light + 1.0 mg/L melatonin. Individually, the level of silybins (A and B), silydianin, isolsilychristin and silychristin was found highest under continuous light. Anti-inflammatory activities were also studied and highest percent inhibition was recorded against 15-lipoxygenase (15-LOX) for cultures cultivated under continuous light (42.33%). The current study helps us to better understand the influence of melatonin and different light regimes on silymarin production as well as antioxidant and anti-inflammatory activities in S. marianum callus extracts.
Collapse
Affiliation(s)
- Muzamil Shah
- Department of Biotechnology, Quaid-i-Azam University, Islamabad-45320, Pakistan.
| | - Muhammad Asad Ullah
- Department of Biotechnology, Quaid-i-Azam University, Islamabad-45320, Pakistan.
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
| | - Muhammad Younas
- Department of Biotechnology, Quaid-i-Azam University, Islamabad-45320, Pakistan.
| | - Duangjai Tungmunnithum
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayuthaya Road, Rajathevi, Bangkok 10400, Thailand.
| | - Nathalie Giglioli-Guivarc'h
- EA2106 Biomolecules et Biotechnologies Vegetales, Universite Francois-Rabelais de Tours, 37000 Tours, France.
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayuthaya Road, Rajathevi, Bangkok 10400, Thailand.
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad-45320, Pakistan.
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
- EA2106 Biomolecules et Biotechnologies Vegetales, Universite Francois-Rabelais de Tours, 37000 Tours, France.
| |
Collapse
|
27
|
Gulve N, Prusty BK, Rudel T. Chlamydia trachomatis impairs host base excision repair by downregulating polymerase β. Cell Microbiol 2019; 21:e12986. [PMID: 30471195 DOI: 10.1111/cmi.12986] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 10/22/2018] [Accepted: 11/22/2018] [Indexed: 12/26/2022]
Abstract
Chlamydia trachomatis infections have been associated with ovarian cancer by several epidemiological studies. Here, we show that C. trachomatis-infected primary human ovarian epithelial cells display elevated oxidative DNA damage. Base excision repair, an important cellular mechanism to repair oxidative DNA lesions, was impaired in infected primary ovarian and in several other types of cells. Polymerase β was downregulated in infected cells associated with upregulation of microRNA-499a (miR-499a). Stabilising polymerase β by inhibiting miR-499a significantly improved repair. Moreover, downregulation of tumour suppressor p53 also resulted in attenuated repair in these cells. Thus, our data show that downregulation of polymerase β by direct inhibition through miR-499a and downregulation of p53 debilitate the host-cell base excision repair during C. trachomatis infection.
Collapse
Affiliation(s)
- Nitish Gulve
- Department of Microbiology, University of Wuerzburg Biocenter, Wuerzburg, Germany
| | - Bhupesh K Prusty
- Department of Microbiology, University of Wuerzburg Biocenter, Wuerzburg, Germany
| | - Thomas Rudel
- Department of Microbiology, University of Wuerzburg Biocenter, Wuerzburg, Germany
| |
Collapse
|
28
|
Son HY, Koo BI, Lee JB, Kim KR, Kim W, Jang J, Yoon MS, Cho JW, Nam YS. Tannin-Titanium Oxide Multilayer as a Photochemically Suppressed Ultraviolet Filter. ACS APPLIED MATERIALS & INTERFACES 2018; 10:27344-27354. [PMID: 30039969 DOI: 10.1021/acsami.8b09200] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
UV filters can initiate redox reactions of oxygen and water when exposed to sunlight, generating reactive oxygen species (ROS) that deteriorate the products containing them and cause biological damages. This photochemical reactivity originates from the high chemical potential of UV filters, which also determines the optical properties desirable for sunscreen applications. We hypothesize that this dilemma can be alleviated if the photochemical pathway of UV filters is altered to coupling with redox active molecules. Here, we employ tannic acid (TA) as a key molecule for controlling the photochemical properties of titanium dioxide nanoparticles (TiO2 NPs). TA provides an unusual way for layer-by-layer assembly of TiO2 NPs by the formation of a ligand-to-metal charge transfer complex that alters the nature of UV absorption of TiO2 NPs. The galloyl moieties of TA efficiently scavenge ROS due to the stabilization of ROS by intramolecular hydrogen bonding while facilitating UV screening through direct charge injection from TA to the conduction band of TiO2. The TiO2-TA multilayers assembled in open porous polymer microspheres substantially increased sun protection while dramatically reducing ROS under UV exposure. The assembled structure exhibits excellent in vivo anti-UV skin protection against epidermal hyperplasia, inflammation, and keratinocyte apoptosis without long-term toxicity.
Collapse
Affiliation(s)
| | | | - Jun Bae Lee
- Innovation Lab , Cosmax Research & Innovation Center , 662 Sampyong-dong , Bundang-gu, Seongnam 13486 , Gyeonggi-do , Republic of Korea
| | | | - Woojin Kim
- Pathology Research Center, Department of Jeonbuk Inhalation Research , Korea Institute of Toxicology , 30 Baekhak-1-gil , Jeongup 56212 , Jeonbuk , Republic of Korea
| | - Jihui Jang
- Innovation Lab , Cosmax Research & Innovation Center , 662 Sampyong-dong , Bundang-gu, Seongnam 13486 , Gyeonggi-do , Republic of Korea
| | - Moung Seok Yoon
- Innovation Lab , Cosmax Research & Innovation Center , 662 Sampyong-dong , Bundang-gu, Seongnam 13486 , Gyeonggi-do , Republic of Korea
| | - Jae-Woo Cho
- Pathology Research Center, Department of Jeonbuk Inhalation Research , Korea Institute of Toxicology , 30 Baekhak-1-gil , Jeongup 56212 , Jeonbuk , Republic of Korea
| | | |
Collapse
|
29
|
Younas M, Drouet S, Nadeem M, Giglioli-Guivarc'h N, Hano C, Abbasi BH. Differential accumulation of silymarin induced by exposure of Silybum marianum L. callus cultures to several spectres of monochromatic lights. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 184:61-70. [PMID: 29803074 DOI: 10.1016/j.jphotobiol.2018.05.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/12/2018] [Accepted: 05/18/2018] [Indexed: 02/06/2023]
Abstract
Silybum marianum L. (Milk thistle) is one of the most extensively studied medicinal herbs with well-known hepatoprotective activity. Light is considered as a key abiotic elicitor influencing several physiological processes in plants, including the biosynthesis of secondary metabolites. In this study, we investigated the influence of light quality on morphological and biochemical aspects in in vitro grown leaf-derived callus cultures of S. marianum. Combination of 6-benzylaminopurine (BAP 2.5 mg/L) and α-naphthalene acetic acid (NAA 1.0 mg/L) resulted in optimum callogenic response (97%) when placed under cool-white light with 16 h light and 8 h dark. Red light significantly increased the total phenolic content (TPC), total flavonoid content (TFC), antioxidant and superoxide dismutase (SOD) activities while highest peroxidase (POD) activity was recorded for the dark grown cultures, followed by green light grown cultures. HPLC analysis revealed enhanced total silymarin content under red light (18.67 mg/g DW), which was almost double than control (9.17 mg/g DW). Individually, the level of silychristin, isosilychristin, silydianin, silybin A and silybin B were found greatest under red light, whereas green spectrum resulted in highest accumulation of isosilybin A and isosilybin B. Conversely, the amount of taxifolin was found maximum under continuous white light (0.480 mg/g DW) which was almost 8-fold greater than control (0.063 mg/g DW). A positive correlation was found between the TPC, TFC and antioxidant activities. This study will assist in comprehending the influence of light quality on production of valuable secondary metabolites in in vitro cultures of S. marianum L.
Collapse
Affiliation(s)
- Muhammad Younas
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), Plant Lignans Team, UPRES EA 1207 INRA USC1328, Université d'Orléans, F 28000 Chartres, France
| | - Muhammad Nadeem
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | | | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), Plant Lignans Team, UPRES EA 1207 INRA USC1328, Université d'Orléans, F 28000 Chartres, France
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan; Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), Plant Lignans Team, UPRES EA 1207 INRA USC1328, Université d'Orléans, F 28000 Chartres, France; EA2106 Biomolécules et Biotechnologies Végétales, Université de Tours, 37200 Tours, France.
| |
Collapse
|
30
|
Melatonin ameliorates restraint stress-induced oxidative stress and apoptosis in testicular cells via NF-κB/iNOS and Nrf2/ HO-1 signaling pathway. Sci Rep 2017; 7:9599. [PMID: 28851995 PMCID: PMC5575312 DOI: 10.1038/s41598-017-09943-2] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 08/01/2017] [Indexed: 01/03/2023] Open
Abstract
Decline in semen quality has become a global public health concern. Psychological stress is common in the current modern society and is associated with semen decline. Increasing evidence demonstrated that melatonin has anti-apoptotic and antioxidant functions. Whether melatonin can ameliorate the damage in testes induced by psychological stress has never been investigated. Here, a mouse model of restraint stress demonstrated that melatonin normalized the sperm density decline, testicular cells apoptosis, and testicular oxidative stress in stressed male mice. Melatonin decreased reactive oxygen species (ROS) level, increased superoxide dismutase (SOD) and glutathione (GSH) activities, and downregulated inducible nitric oxide synthase (iNOS) and tumor necrosis factor-α (TNF-α) activities in stressed mice testes. Furthermore, melatonin reduced the stress-induced activation of the NF-κB signaling pathway by decreasing the phosphorylation of nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha (IκBα) and p65 nuclear translocation. In addition, melatonin upregulated the expression of anti-oxidant proteins including nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1). Meanwhile, in vitro studies also demonstrated melatonin could reduce oxidative apoptosis of testicular cells. Collectively, melatonin mitigated psychological stress-induced spermatogenic damage, which provides evidence for melatonin as a therapy against sperm impairment associated with psychological stress.
Collapse
|
31
|
Jamieson GC, Fox JA, Poi M, Strickland SA. Molecular and Pharmacologic Properties of the Anticancer Quinolone Derivative Vosaroxin: A New Therapeutic Agent for Acute Myeloid Leukemia. Drugs 2017; 76:1245-1255. [PMID: 27484675 PMCID: PMC4989016 DOI: 10.1007/s40265-016-0614-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Vosaroxin is a first-in-class anticancer quinolone derivative that targets topoisomerase II and induces site-selective double-strand breaks in DNA, leading to tumor cell apoptosis. Vosaroxin has chemical and pharmacologic characteristics distinct from other topoisomerase II inhibitors due to its quinolone scaffold. The efficacy and safety of vosaroxin in combination with cytarabine were evaluated in patients with relapsed/refractory acute myeloid leukemia (AML) in a phase III, randomized, multicenter, double-blind, placebo-controlled study (VALOR). In this study, the addition of vosaroxin produced a 1.4-month improvement in median overall survival (OS; 7.5 months with vosaroxin/cytarabine vs. 6.1 months with placebo/cytarabine; hazard ratio [HR] 0.87, 95 % confidence interval [CI] 0.73−1.02; unstratified log-rank p\documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$=$$\end{document}= 0.061; stratified log-rank p\documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$=$$\end{document}=0.024), with the greatest OS benefit observed in patients ≥60 years of age (7.1 vs. 5.0 months; HR 0.75, 95 % CI 0.62−0.92; p\documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$=$$\end{document}=0.003) and patients with early relapse (6.7 vs. 5.2 months; HR 0.77, 95 % CI 0.59−1.00; p\documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$=$$\end{document}= 0.039), two AML patient groups that typically have poor prognosis. Here we review the chemical and pharmacologic properties of vosaroxin, how these properties are distinct from those of currently available topoisomerase II inhibitors, how they may contribute to the efficacy and safety profile observed in the VALOR trial, and the status of clinical development of vosaroxin for treatment of AML.
Collapse
Affiliation(s)
| | - Judith A Fox
- Sunesis Pharmaceuticals, Inc., South San Francisco, CA, USA
| | - Ming Poi
- College of Pharmacy, Ohio State University, Columbus, OH, USA
| | - Stephen A Strickland
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt University, 2220 Pierce Avenue, 777 Preston Research Building, Nashville, TN, 37232, USA.
| |
Collapse
|
32
|
Paubelle E, Zylbersztejn F, Thomas X. The preclinical discovery of vosaroxin for the treatment of acute myeloid leukemia. Expert Opin Drug Discov 2017; 12:747-753. [PMID: 28504025 DOI: 10.1080/17460441.2017.1331215] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
INTRODUCTION Acute myeloid leukemia (AML) represents a disease with a very poor outcome and remains an area of significant unmet need necessitating novel therapeutic strategies. Among novel therapeutic agents, vosaroxin is a first-in-class anticancer quinolone derivative that targets topoisomerase II and induces site-selective double-strand breaks in DNA, leading to tumor cell apoptosis. Areas covered: Herein, the authors provide a comprehensive review of the preclinical development of vosaroxin. This includes coverage of vosaroxin's mechanism of action in addition to its pharmacology and of the main studies reported over the past few years with vosaroxin when used to treat adult AML. Expert opinion: Given that vosaroxin is associated with fewer potential side effects, it may be of benefit to elderly patients with relapsed/refractory AML and to those with additional comorbidities who have previously received an anthracycline and cytarabine combination. Furthermore, vosaroxin also was seen to be active in multidrug-resistant preclinical models. However, further studies have to be performed to better evaluate its place in the armamentarium against AML.
Collapse
Affiliation(s)
- Etienne Paubelle
- a Hospices Civils de Lyon, Hematology Department , Lyon-Sud Hospital , Pierre-Bénite , France
| | | | - Xavier Thomas
- a Hospices Civils de Lyon, Hematology Department , Lyon-Sud Hospital , Pierre-Bénite , France
| |
Collapse
|
33
|
Fluctuation of ROS regulates proliferation and mediates inhibition of migration by reducing the interaction between DLC1 and CAV-1 in breast cancer cells. In Vitro Cell Dev Biol Anim 2017; 53:354-362. [PMID: 28130753 DOI: 10.1007/s11626-016-0123-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 12/14/2016] [Indexed: 12/30/2022]
Abstract
The aim of our present study was to elucidate the effects of up-regulation and down-regulation of intracellular reactive oxygen species (ROS) level on proliferation, migration, and related molecular mechanism. Breast cancer cells were treated by catalase or H2O2. MTT, colony formation assay, and Hoechst/PI staining were used to evaluate proliferation and apoptosis. The level of intracellular ROS was measured by dichlorodihydrofluorescein diacetate probes. The ability of migration was detected by wound healing. Western blotting and coimmunoprecipitation (co-IP) were used to determine the expression of DLC1 and CAV-1 and their interaction. Our data indicated that up-regulation of intracellular ROS induced by H2O2 significantly inhibited proliferation and induced apoptosis accompanying G1 cell cycle arrest and elevated expression of p53. For cell migration, either up-regulation or down-regulation of ROS induced migration inhibition with reduction of interaction between DLC1 and CAV-1. Our results suggested that up-regulation of intracellular ROS inhibited proliferation by promoting expression of p53 and induced G1 cycle arrest and apoptosis. Fluctuation of ROS inhibited migration through reducing the interaction between DLC1 and CAV-1.
Collapse
|
34
|
Poore EA, Slifka DK, Raué HP, Thomas A, Hammarlund E, Quintel BK, Torrey LL, Slifka AM, Richner JM, Dubois ME, Johnson LP, Diamond MS, Slifka MK, Amanna IJ. Pre-clinical development of a hydrogen peroxide-inactivated West Nile virus vaccine. Vaccine 2016; 35:283-292. [PMID: 27919629 DOI: 10.1016/j.vaccine.2016.11.080] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 11/17/2016] [Accepted: 11/18/2016] [Indexed: 02/08/2023]
Abstract
West Nile virus (WNV) is a mosquito-transmitted pathogen with a wide geographical range that can lead to long-term disability and death in some cases. Despite the public health risk posed by WNV, including an estimated 3 million infections in the United States alone, no vaccine is available for use in humans. Here, we present a scaled manufacturing approach for production of a hydrogen peroxide-inactivated whole virion WNV vaccine, termed HydroVax-001WNV. Vaccination resulted in robust virus-specific neutralizing antibody responses and protection against WNV-associated mortality in mice or viremia in rhesus macaques (RM). A GLP-compliant toxicology study performed in rats demonstrated an excellent safety profile with clinical findings limited to minor and transient irritation at the injection site. An in vitro relative potency (IVRP) assay was developed and shown to correlate with in vivo responses following forced degradation studies. Long-term in vivo potency comparisons between the intended storage condition (2-8°C) and a thermally stressed condition (40±2°C) demonstrated no loss in vaccine efficacy or protective immunity over a 6-month span of time. Together, the positive pre-clinical findings regarding immunogenicity, safety, and stability indicate that HydroVax-001WNV is a promising vaccine candidate.
Collapse
Affiliation(s)
| | | | - Hans-Peter Raué
- Division of Neuroscience, Oregon National Primate Research Center, Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Beaverton, OR, USA
| | - Archana Thomas
- Division of Neuroscience, Oregon National Primate Research Center, Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Beaverton, OR, USA
| | - Erika Hammarlund
- Division of Neuroscience, Oregon National Primate Research Center, Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Beaverton, OR, USA
| | | | | | | | - Justin M Richner
- Departments of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | | | | | - Michael S Diamond
- Departments of Medicine, Washington University School of Medicine, St. Louis, MO, USA; Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA; Pathology & Immunology, Washington University School of Medicine, St. Louis, MO, USA; The Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA
| | - Mark K Slifka
- Najít Technologies, Inc, Beaverton, OR, USA; Division of Neuroscience, Oregon National Primate Research Center, Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Beaverton, OR, USA
| | | |
Collapse
|
35
|
Toxicity assessment of anatase and rutile titanium dioxide nanoparticles: The role of degradation in different pH conditions and light exposure. Toxicol In Vitro 2016; 37:201-210. [DOI: 10.1016/j.tiv.2016.09.010] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 08/14/2016] [Accepted: 09/09/2016] [Indexed: 12/27/2022]
|
36
|
Resveratrol ameliorates benzo(a)pyrene-induced testicular dysfunction and apoptosis: involvement of p38 MAPK/ATF2/iNOS signaling. J Nutr Biochem 2016; 34:17-29. [DOI: 10.1016/j.jnutbio.2016.04.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 04/07/2016] [Accepted: 04/15/2016] [Indexed: 11/20/2022]
|
37
|
Das S, Majumder S, Gupta S, Dutta S, Mukherjee D. Effects of phenol on ovarian P450arom gene expression and aromatase activity in vivo and antioxidant metabolism in common carp Cyprinus carpio. FISH PHYSIOLOGY AND BIOCHEMISTRY 2016; 42:275-286. [PMID: 26403910 DOI: 10.1007/s10695-015-0135-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 09/19/2015] [Indexed: 06/05/2023]
Abstract
Ovarian cyp19a mRNA expression and P450 aromatase activity were measured in vivo in common carp Cyprinus carpio exposed to phenol for 96 h. Production of reactive oxygen species (ROS) and parameters of antioxidant defense system in serum ovary and liver of this fish after long-term phenol exposure were also studied. In vivo exposure of fish to sublethal dose of phenol for 96 h caused marked attenuation of ovarian cyp19a1a gene expression and P450 aromatase activity. Production of ROS like hydrogen peroxide and hydroxyl radicals in serum, liver and ovary in fish exposed to phenol for 15 days elevated significantly from day 1 to day 7 with no further significant increase thereafter compared to their respective control values. Total superoxide dismutase (SOD) and catalase activities in serum and ovary decreased gradually and significantly from day 1 to day 4, which then increased significantly for the rest of the exposure days. Liver SOD activity seemed to be distinctly responsive to phenol. SOD activity in liver of phenol-exposed fish started to increase gradually from day 1 to 4 with no further increase thereafter. Catalase activities in all the tissues showed significant inhibition up to day 4 which then increased gradually and significantly up to day 15 of phenol exposure compared to their respective control values. From our results, it appears that sublethal dose of phenol has the endocrine disruptive potential and effect is mediated via inhibition of ovarian P450arom gene expression and aromatase activity in vivo. Sublethal dose of phenol also caused oxidative stress, and antioxidant systems are very much effective to prevent the damages caused by the generation of ROS.
Collapse
Affiliation(s)
- Sumana Das
- Department of Zoology, Krishnanagar Government College, Krishnanagar, West Bengal, 741101, India.
| | - Suravi Majumder
- Endocrinology Laboratory, Department of Zoology, Kalyani University, Kalyani, West Bengal, 741235, India
| | - Shreyasi Gupta
- Endocrinology Laboratory, Department of Zoology, Kalyani University, Kalyani, West Bengal, 741235, India
| | - Sharmistha Dutta
- Department of Zoology, Maulana Azad College, Kolkata, West Bengal, 700013, India
| | - Dilip Mukherjee
- Endocrinology Laboratory, Department of Zoology, Kalyani University, Kalyani, West Bengal, 741235, India.
| |
Collapse
|
38
|
Biology of Heme in Mammalian Erythroid Cells and Related Disorders. BIOMED RESEARCH INTERNATIONAL 2015; 2015:278536. [PMID: 26557657 PMCID: PMC4628764 DOI: 10.1155/2015/278536] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 06/14/2015] [Indexed: 01/19/2023]
Abstract
Heme is a prosthetic group comprising ferrous iron (Fe(2+)) and protoporphyrin IX and is an essential cofactor in various biological processes such as oxygen transport (hemoglobin) and storage (myoglobin) and electron transfer (respiratory cytochromes) in addition to its role as a structural component of hemoproteins. Heme biosynthesis is induced during erythroid differentiation and is coordinated with the expression of genes involved in globin formation and iron acquisition/transport. However, erythroid and nonerythroid cells exhibit distinct differences in the heme biosynthetic pathway regulation. Defects of heme biosynthesis in developing erythroblasts can have profound medical implications, as represented by sideroblastic anemia. This review will focus on the biology of heme in mammalian erythroid cells, including the heme biosynthetic pathway as well as the regulatory role of heme and human disorders that arise from defective heme synthesis.
Collapse
|
39
|
Bollu VS, Nethi SK, Dasari RK, Rao SSN, Misra S, Patra CR. Evaluation ofin vivocytogenetic toxicity of europium hydroxide nanorods (EHNs) in male and female Swiss albino mice. Nanotoxicology 2015; 10:413-25. [DOI: 10.3109/17435390.2015.1073398] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
40
|
Singla M, Ranjan R, Mahiya K, Mohapatra SC, Ahmad S. Nitric oxide inhibition, antioxidant, and antitumour activities of novel copper(ii) bis-benzimidazole diamide nanocoordination complexes. NEW J CHEM 2015. [DOI: 10.1039/c4nj02147a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Antitumor effect illustrated by changes in body weight. In control mice, body weight increased to 11.5 g but when treated withC3, body weight difference as compared to the control decreased by 4.7 g and decreased to 2.2 g and 0.6 g withC1andC2, respectively.
Collapse
Affiliation(s)
- Manisha Singla
- Department of Chemistry
- Keshav Mahavidhyalya
- University of Delhi
- New Delhi
- India
| | - Rajeev Ranjan
- Department of Zoology
- University of Delhi
- New Delhi
- India
| | - Kuldeep Mahiya
- Department of Chemistry
- Ch. Devi Lal University
- Sirsa
- India
| | - Subash C. Mohapatra
- Department of Chemistry
- Atma Ram Sanatan Dharma College
- University of Delhi
- New Delhi
- India
| | - Sharif Ahmad
- Department of Chemistry
- Jamia Millia Islamia
- New Delhi
- India
| |
Collapse
|
41
|
Uygur R, Aktas C, Tulubas F, Alpsoy S, Topcu B, Ozen OA. Cardioprotective effects of fish omega-3 fatty acids on doxorubicin-induced cardiotoxicity in rats. Hum Exp Toxicol 2013; 33:435-45. [DOI: 10.1177/0960327113493304] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The aim of this study was to investigate the protective effects of fish omega-3 (n-3) fatty acids on doxorubicin (DOX)-induced acute cardiotoxicity. A total of 24 rats were divided into three groups: control, DOX-treated, and DOX treated with fish n-3 fatty acids. Control group received 0.4 ml/kg/day of saline intragastrically. The rats in the fish n-3 fatty acid-pretreated group were given 400 mg/kg/day fish n-3 fatty acids for 30 days by intragastric intubation. To induce acute cardiotoxicity, DOX (30 mg/kg) was injected intraperitoneally by a single dose and the rats were killed after 48 h. DOX treatment caused severe damage in heart tissues. Disorganization of myocardial muscle fibers, myofibrillar loss, and cardiotoxic myocardial fibers with cytoplasmic vacuoles were seen. Fish n-3 fatty acid-treated rats showed an improved histological appearance in the DOX-treated group. Our data indicate a significant reduction in the activity of terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end labeling in cardiomyocytes of the DOX-treated group with fish n-3 fatty acids therapy. The DOX-treated with fish n-3 fatty acids group showed a significant decrease in malondialdehyde levels, and an increase in superoxide dismutase and glutathione peroxidase activities in comparison with the DOX-treated group. This study showed that fish n-3 fatty acids may be a suitable cardioprotector against acute toxic effects of DOX.
Collapse
Affiliation(s)
- R Uygur
- Department of Anatomy, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - C Aktas
- Department of Histology and Embryology, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - F Tulubas
- Department of Biochemistry, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - S Alpsoy
- Department of Cardiology, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - B Topcu
- Department of Biostatistics, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| | - OA Ozen
- Department of Anatomy, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey
| |
Collapse
|
42
|
|
43
|
Freeman C, Keane N, Swords R, Giles F. Vosaroxin: a new valuable tool with the potential to replace anthracyclines in the treatment of AML? Expert Opin Pharmacother 2013; 14:1417-27. [PMID: 23688047 DOI: 10.1517/14656566.2013.799138] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
INTRODUCTION Despite significant advances in diagnosis and supportive care, the majority of patients diagnosed with acute myeloid leukemia (AML) ultimately die of their disease. Standard intensive induction treatment continues to comprise cytarabine and a topoisomerase II (topo II) poison, usually an anthracycline. Vosaroxin , a novel first-in-class quinolone derivative has been developed for use in the treatment of AML as a new-generation topo II inhibitor. It has shown promising activity as a monotherapy and also in combination with intermediate dose cytarabine (IDAC) in relapsed and refractory patient cohorts with minimal toxicity and good tolerability. AREAS COVERED The authors discuss the mechanism of action of vosaroxin, the pharmacokinetics, safety and tolerability, preclinical and clinical trial results available as well as areas of ongoing research. EXPERT OPINION Vosaroxin has shown efficacy as a novel cytotoxic agent, and despite a similar mechanism of action has significant advantages over anthracyclines. It evades common resistance pathways of p53 and P-glycoprotein (P- gp) and does not appear to generate significant reactive oxygen species (ROS) associated with these agents. Should future investigation confirm its efficacy and advantageous safety profile, vosaroxin could potentially replace older generation topoisomerase poisons in the treatment of AML and other malignant conditions.
Collapse
Affiliation(s)
- Ciara Freeman
- Department of Haematology, Pathology and Pharmacy Building, Barts and the London NHS Trust, 80 Newark Street, Whitechapel, E1 2ES, London, UK.
| | | | | | | |
Collapse
|
44
|
Dietary supplementation of flaxseed oil ameliorates the effect of cisplatin on rat kidney. J Funct Foods 2013. [DOI: 10.1016/j.jff.2012.11.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
|
45
|
Functional comparison of Deinococcus radiodurans Dps proteins suggests distinct in vivo roles. Biochem J 2012; 447:381-91. [PMID: 22857940 DOI: 10.1042/bj20120902] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Deinococcus radiodurans exhibits extreme resistance to DNA damage and is one of only few bacteria that encode two Dps (DNA protection during starvation) proteins. Dps-1 was shown previously to bind DNA with high affinity and to localize to the D. radiodurans nucleoid. A unique feature of Dps-2 is its predicted signal peptide. In the present paper, we report that Dps-2 assembly into a dodecamer requires the C-terminal extension and, whereas Dps-2 binds DNA with low affinity, it protects against degradation by reactive oxygen species. Consistent with a role for Dps-2 in oxidative stress responses, the Dps-2 promoter is up-regulated by oxidative stress, whereas the Dps-1 promoter is not. Although DAPI (4',6-diamidino-2-phenylindole) staining of Escherichia coli nucleoids shows that Dps-1 can compact genomic DNA, such nucleoid condensation is absent from cells expressing Dps-2. A fusion of EGFP (enhanced green fluorescent protein) to the Dps-2 signal peptide results in green fluorescence at the perimeter of D. radiodurans cells. The differential response of the Dps-1 and Dps-2 promoters to oxidative stress, the distinct cellular localization of the proteins and the differential ability of Dps-1 and Dps-2 to attenuate hydroxyl radical production suggest distinct functional roles; whereas Dps-1 may function in DNA metabolism, Dps-2 may protect against exogenously derived reactive oxygen species.
Collapse
|
46
|
Chuang HC, Cheng YL, Lei YC, Chang HH, Cheng TJ. Protective effects of pulmonary epithelial lining fluid on oxidative stress and DNA single-strand breaks caused by ultrafine carbon black, ferrous sulphate and organic extract of diesel exhaust particles. Toxicol Appl Pharmacol 2012; 266:329-34. [PMID: 23261976 DOI: 10.1016/j.taap.2012.12.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 12/03/2012] [Accepted: 12/06/2012] [Indexed: 11/30/2022]
Abstract
Pulmonary epithelial lining fluid (ELF) is the first substance to make contact with inhaled particulate matter (PM) and interacts chemically with PM components. The objective of this study was to determine the role of ELF in oxidative stress, DNA damage and the production of proinflammatory cytokines following physicochemical exposure to PM. Ultrafine carbon black (ufCB, 15 nm; a model carbonaceous core), ferrous sulphate (FeSO(4); a model transition metal) and a diesel exhaust particle (DEP) extract (a model organic compound) were used to examine the acellular oxidative potential of synthetic ELF and non-ELF systems. We compared the effects of exposure to ufCB, FeSO(4) and DEP extract on human alveolar epithelial Type II (A549) cells to determine the levels of oxidative stress, DNA single-strand breaks and interleukin-8 (IL-8) production in ELF and non-ELF systems. The effects of ufCB and FeSO(4) on the acellular oxidative potential, cellular oxidative stress and DNA single-strand breakage were mitigated significantly by the addition of ELF, whereas there was no decrease following treatment with the DEP extract. There was no significant effect on IL-8 production following exposure to samples that were suspended in ELF/non-ELF systems. The results of the present study indicate that ELF plays an important role in the initial defence against PM in the pulmonary environment. Experimental components, such as ufCB and FeSO(4), induced the production of oxidative stress and led to DNA single-strand breaks, which were moderately prevented by the addition of ELF. These findings suggest that ELF plays a protective role against PM-driven oxidative stress and DNA damage.
Collapse
Affiliation(s)
- Hsiao-Chi Chuang
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | | | | | | | | |
Collapse
|
47
|
Wakeman CA, Hammer ND, Stauff DL, Attia AS, Anzaldi LL, Dikalov SI, Calcutt MW, Skaar EP. Menaquinone biosynthesis potentiates haem toxicity in Staphylococcus aureus. Mol Microbiol 2012; 86:1376-92. [PMID: 23043465 DOI: 10.1111/mmi.12063] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/02/2012] [Indexed: 02/06/2023]
Abstract
Staphylococcus aureus is a pathogen that infects multiple anatomical sites leading to a diverse array of diseases. Although vertebrates can restrict the growth of invading pathogens by sequestering iron within haem, S. aureus surmounts this challenge by employing high-affinity haem uptake systems. However, the presence of excess haem is highly toxic, necessitating tight regulation of haem levels. To overcome haem stress, S. aureus expresses the detoxification system HrtAB. In this work, a transposon screen was performed in the background of a haem-susceptible, HrtAB-deficient S. aureus strain to identify the substrate transported by this putative pump and the source of haem toxicity. While a recent report indicates that HrtAB exports haem itself, the haem-resistant mutants uncovered by the transposon selection enabled us to elucidate the cellular factors contributing to haem toxicity. All mutants identified in this screen inactivated the menaquinone (MK) biosynthesis pathway. Deletion of the final steps of this pathway revealed that quinone molecules localizing to the cell membrane potentiate haem-associated superoxide production and subsequent oxidative damage. These data suggest a model in which membrane-associated haem and quinone molecules form a redox cycle that continuously generates semiquinones and reduced haem, both of which react with atmospheric oxygen to produce superoxide.
Collapse
Affiliation(s)
- Catherine A Wakeman
- Department of Pathology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Characterization of CD8+ T cell function and immunodominance generated with an H2O2-inactivated whole-virus vaccine. J Virol 2012; 86:13735-44. [PMID: 23055558 DOI: 10.1128/jvi.02178-12] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
CD8(+) T cells play an important role in protection against both acute and persistent viral infections, and new vaccines that induce CD8(+) T cell immunity are currently needed. Here, we show that lymphocytic choriomeningitis virus (LCMV)-specific CD8(+) T cells can be generated in response to a nonreplicating H(2)O(2)-inactivated whole-virus vaccine (H(2)O(2)-LCMV). Vaccine-induced CD8(+) T cell responses exhibited an increased ability to produce multiple cytokines at early time points following immunization compared to infection-induced responses. Vaccination with H(2)O(2)-LCMV induced the expansion of a narrow subset of the antigen-specific CD8(+) T cells induced by LCMV strain Arm infection, resulting in a distinct immunodominance hierarchy. Acute LCMV infection stimulated immunodominance patterns that shifted over time or after secondary infection, whereas vaccine-generated immunodominance profiles remained remarkably stable even following subsequent viral infection. Vaccine-induced CD8(+) T cell populations expanded sharply in response to challenge and were then maintained at high levels, with responses to individual epitopes occupying up to 40% of the CD8(+) T cell compartment at 35 days after challenge. H(2)O(2)-LCMV vaccination protected animals against challenge with chronic LCMV clone 13, and protection was mediated by CD8(+) T cells. These results indicate that vaccination with an H(2)O(2)-inactivated whole-virus vaccine induces LCMV-specific CD8(+) T cells with unique functional characteristics and provides a useful model for studying CD8(+) T cells elicited in the absence of active viral infection.
Collapse
|
49
|
Naqshbandi A, Rizwan S, Khan MW, Khan F. Dietary flaxseed oil supplementation ameliorates the effect of cisplatin on brush border membrane enzymes and antioxidant system in rat intestine. Hum Exp Toxicol 2012; 32:385-94. [PMID: 22751286 DOI: 10.1177/0960327112438929] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Cisplatin (CP; cis-diamminedichloroplatinum II) is a drug widely used against different types of solid tumors. Patients receiving CP, however, experience very profound and long lasting gastrointestinal symptoms. Recently, ω-3 polyunsaturated fatty acid-enriched flaxseed/flaxseed oil (FXO) has shown numerous health benefits. The present study was undertaken to investigate whether FXO can prevent CP-induced adverse biochemical changes in the small intestine of rats. A single intraperitoneal dose of CP (6 mg/kg body weight) was administered to male Wistar rats fed with control diet (CP group) and FXO diet (CPFXO group). Administration of CP led to a significant decline in the specific activities of brush border membrane enzymes both in the mucosal homogenates and in the isolated membrane vesicles. Lipid peroxidation and total sulfhydryl groups were altered upon CP treatment, indicating the generation of oxidative stress. The activities of SOD, catalase and glutathione peroxidase also decreased in CP-treated rats. In contrast, dietary supplementation of FXO prior to and following CP treatment significantly attenuated the CP-induced changes in all these parameters. FXO feeding markedly enhanced resistance to CP-elicited adverse gastrointestinal effects. The results suggest that FXO owing to its intrinsic biochemical/antioxidant properties is an effective agent in reducing the adverse effects of CP on intestine.
Collapse
Affiliation(s)
- A Naqshbandi
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | | | | | | |
Collapse
|
50
|
Christophersen OA. Radiation protection following nuclear power accidents: a survey of putative mechanisms involved in the radioprotective actions of taurine during and after radiation exposure. MICROBIAL ECOLOGY IN HEALTH AND DISEASE 2012; 23:14787. [PMID: 23990836 PMCID: PMC3747764 DOI: 10.3402/mehd.v23i0.14787] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Accepted: 11/18/2011] [Indexed: 12/28/2022]
Abstract
There are several animal experiments showing that high doses of ionizing radiation lead to strongly enhanced leakage of taurine from damaged cells into the extracellular fluid, followed by enhanced urinary excretion. This radiation-induced taurine depletion can itself have various harmful effects (as will also be the case when taurine depletion is due to other causes, such as alcohol abuse or cancer therapy with cytotoxic drugs), but taurine supplementation has been shown to have radioprotective effects apparently going beyond what might be expected just as a consequence of correcting the harmful consequences of taurine deficiency per se. The mechanisms accounting for the radioprotective effects of taurine are, however, very incompletely understood. In this article an attempt is made to survey various mechanisms that potentially might be involved as parts of the explanation for the overall beneficial effect of high levels of taurine that has been found in experiments with animals or isolated cells exposed to high doses of ionizing radiation. It is proposed that taurine may have radioprotective effects by a combination of several mechanisms: (1) during the exposure to ionizing radiation by functioning as an antioxidant, but perhaps more because it counteracts the prooxidant catalytic effect of iron rather than functioning as an important scavenger of harmful molecules itself, (2) after the ionizing radiation exposure by helping to reduce the intensity of the post-traumatic inflammatory response, and thus reducing the extent of tissue damage that develops because of severe inflammation rather than as a direct effect of the ionizing radiation per se, (3) by functioning as a growth factor helping to enhance the growth rate of leukocytes and leukocyte progenitor cells and perhaps also of other rapidly proliferating cell types, such as enterocyte progenitor cells, which may be important for immunological recovery and perhaps also for rapid repair of various damaged tissues, especially in the intestines, and (4) by functioning as an antifibrogenic agent. A detailed discussion is given of possible mechanisms involved both in the antioxidant effects of taurine, in its anti-inflammatory effects and in its role as a growth factor for leukocytes and nerve cells, which might be closely related to its role as an osmolyte important for cellular volume regulation because of the close connection between cell volume regulation and the regulation of protein synthesis as well as cellular protein degradation. While taurine supplementation alone would be expected to exert a therapeutic effect far better than negligible in patients that have been exposed to high doses of ionizing radiation, it may on theoretical grounds be expected that much better results may be obtained by using taurine as part of a multifactorial treatment strategy, where it may interact synergistically with several other nutrients, hormones or other drugs for optimizing antioxidant protection and minimizing harmful posttraumatic inflammatory reactions, while using other nutrients to optimize DNA and tissue repair processes, and using a combination of good diet, immunostimulatory hormones and perhaps other nontoxic immunostimulants (such as beta-glucans) for optimizing the recovery of antiviral and antibacterial immune functions. Similar multifactorial treatment strategies may presumably be helpful in several other disease situations (including severe infectious diseases and severe asthma) as well as for treatment of acute intoxications or acute injuries (both mechanical ones and severe burns) where severely enhanced oxidative and/or nitrative stress and/or too much secretion of vasodilatory neuropeptides from C-fibres are important parts of the pathogenetic mechanisms that may lead to the death of the patient. Some case histories (with discussion of some of those mechanisms that may have been responsible for the observed therapeutic outcome) are given for illustration of the likely validity of these concepts and their relevance both for treatment of severe infections and non-infectious inflammatory diseases such as asthma and rheumatoid arthritis.
Collapse
|