1
|
Soares RB, Manguinhas R, Costa JG, Saraiva N, Gil N, Rosell R, Camões SP, Batinic-Haberle I, Spasojevic I, Castro M, Miranda JP, Guedes de Pinho P, Fernandes AS, Oliveira NG. The Redox-Active Manganese(III) Porphyrin, MnTnBuOE-2-PyP 5+, Impairs the Migration and Invasion of Non-Small Cell Lung Cancer Cells, Either Alone or Combined with Cisplatin. Cancers (Basel) 2023; 15:3814. [PMID: 37568630 PMCID: PMC10416961 DOI: 10.3390/cancers15153814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 07/21/2023] [Indexed: 08/13/2023] Open
Abstract
Manganese(III) porphyrin MnTnBuOE-2-PyP5+ (MnBuOE, BMX-001) is a third-generation redox-active cationic substituted pyridylporphyrin-based drug with a good safety/toxicity profile that has been studied in several types of cancer. It is currently in four phase I/II clinical trials on patients suffering from glioma, head and neck cancer, anal squamous cell carcinoma and multiple brain metastases. There is yet an insufficient understanding of the impact of MnBuOE on lung cancer. Therefore, this study aims to fill this gap by demonstrating the effects of MnBuOE on non-small cell lung cancer (NSCLC) A549 and H1975 cell lines. The cytotoxicity of MnBuOE alone or combined with cisplatin was evaluated by crystal violet (CV) and/or 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulphophenyl)-2H-Tetrazolium (MTS) reduction assays. Intracellular ROS levels were assessed using two fluorescent probes. Furthermore, the impact of MnBuOE alone or in combination with cisplatin on collective cell migration, individual chemotactic migration and chemoinvasion was assessed using the wound-healing and transwell assays. The expression of genes related to migration and invasion was assessed through RT-qPCR. While MnBuOE alone decreased H1975 cell viability at high concentrations, when combined with cisplatin it markedly reduced the viability of the more invasive H1975 cell line but not of A549 cell line. However, MnBuOE alone significantly decreased the migration of both cell lines. The anti-migratory effect was more pronounced when MnBuOE was combined with cisplatin. Finally, MnBuOE alone or combined with cisplatin significantly reduced cell invasion. MnBuOE alone or combined with cisplatin downregulated MMP2, MMP9, VIM, EGFR and VEGFA and upregulated CDH1 in both cell lines. Overall, our data demonstrate the anti-metastatic potential of MnBuOE for the treatment of NSCLC.
Collapse
Affiliation(s)
- Rita B. Soares
- Research Institute for Medicines (imed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal; (R.B.S.); (R.M.); (S.P.C.); (M.C.); (J.P.M.)
- Lung Unit, Champalimaud Clinical Centre, Champalimaud Foundation, Av. Brasília, 1400-038 Lisbon, Portugal;
| | - Rita Manguinhas
- Research Institute for Medicines (imed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal; (R.B.S.); (R.M.); (S.P.C.); (M.C.); (J.P.M.)
| | - João G. Costa
- Universidade Lusófona’s Research Center for Biosciences & Health Technologies (CBIOS), Campo Grande 376, 1749-024 Lisboa, Portugal; (J.G.C.); (N.S.)
| | - Nuno Saraiva
- Universidade Lusófona’s Research Center for Biosciences & Health Technologies (CBIOS), Campo Grande 376, 1749-024 Lisboa, Portugal; (J.G.C.); (N.S.)
| | - Nuno Gil
- Lung Unit, Champalimaud Clinical Centre, Champalimaud Foundation, Av. Brasília, 1400-038 Lisbon, Portugal;
| | - Rafael Rosell
- Laboratory of Cellular and Molecular Biology, Institute for Health Science Research Germans Trias I Pujol (IGTP), Campus Can Ruti, Ctra de Can Ruti, Camí de les Escoles, s/n, 08916 Badalona, Barcelona, Spain;
| | - Sérgio P. Camões
- Research Institute for Medicines (imed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal; (R.B.S.); (R.M.); (S.P.C.); (M.C.); (J.P.M.)
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, USA;
| | - Ivan Spasojevic
- Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA;
- PK/PD Core Laboratory, Duke Cancer Institute, Duke University School of Medicine, Durham, NC 27710, USA
| | - Matilde Castro
- Research Institute for Medicines (imed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal; (R.B.S.); (R.M.); (S.P.C.); (M.C.); (J.P.M.)
| | - Joana P. Miranda
- Research Institute for Medicines (imed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal; (R.B.S.); (R.M.); (S.P.C.); (M.C.); (J.P.M.)
| | - Paula Guedes de Pinho
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, Department of Biological Sciences, Laboratory of Toxicology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal;
- UCIBIO, REQUIMTE, Laboratory of Toxicology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Ana S. Fernandes
- Universidade Lusófona’s Research Center for Biosciences & Health Technologies (CBIOS), Campo Grande 376, 1749-024 Lisboa, Portugal; (J.G.C.); (N.S.)
| | - Nuno G. Oliveira
- Research Institute for Medicines (imed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal; (R.B.S.); (R.M.); (S.P.C.); (M.C.); (J.P.M.)
| |
Collapse
|
2
|
Soares RB, Manguinhas R, Costa JG, Saraiva N, Gil N, Rosell R, Camões SP, Batinic-Haberle I, Spasojevic I, Castro M, Miranda JP, Amaro F, Pinto J, Fernandes AS, Guedes de Pinho P, Oliveira NG. MnTnHex-2-PyP 5+ Displays Anticancer Properties and Enhances Cisplatin Effects in Non-Small Cell Lung Cancer Cells. Antioxidants (Basel) 2022; 11:2198. [PMID: 36358570 PMCID: PMC9686800 DOI: 10.3390/antiox11112198] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/27/2022] [Accepted: 10/29/2022] [Indexed: 08/13/2023] Open
Abstract
The manganese(III) porphyrin MnTnHex-2-PyP5+ (MnTnHex) is a potent superoxide dismutase mimic and modulator of redox-based transcriptional activity that has been studied in the context of different human disease models, including cancer. Nevertheless, for lung cancer, hardly any information is available. Thus, the present work aims to fill this gap and reports the effects of MnTnHex in non-small cell lung cancer (NSCLC) cells, more specifically, A549 and H1975 cells, in vitro. Both cell lines were initially characterized in terms of innate levels of catalase, glutathione peroxidase 1, and peroxiredoxins 1 and 2. To assess the effect of MnTnHex in NSCLC, alone or in combination with cisplatin, endpoints related to the cell viability, cell cycle distribution, cell motility, and characterization of the volatile carbonyl compounds (VCCs) generated in the extracellular medium (i.e., exometabolome) were addressed. The results show that MnTnHex as a single drug markedly reduced the viability of both NSCLC cell lines, with some IC50 values reaching sub-micromolar levels. This redox-active drug also altered the cell cycle distribution, induced cell death, and increased the cytotoxicity pattern of cisplatin. MnTnHex also reduced collective cell migration. Finally, the metabolomics study revealed an increase in the levels of a few VCCs associated with oxidative stress in MnTnHex-treated cells. Altogether these results suggest the therapeutic potential of MnTnHex to be further explored, either alone or in combination therapy with cisplatin, in NSCLC.
Collapse
Affiliation(s)
- Rita B. Soares
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal
| | - Rita Manguinhas
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal
| | - João G. Costa
- Universidade Lusófona’s Research Center for Biosciences & Health Technologies (CBIOS), Campo Grande 376, 1749-024 Lisboa, Portugal
| | - Nuno Saraiva
- Universidade Lusófona’s Research Center for Biosciences & Health Technologies (CBIOS), Campo Grande 376, 1749-024 Lisboa, Portugal
| | - Nuno Gil
- Lung Unit, Champalimaud Clinical Centre, Champalimaud Foundation, Av. Brasília, 1400-038 Lisbon, Portugal
| | - Rafael Rosell
- Laboratory of Cellular and Molecular Biology, Institute for Health Science Research Germans Trias i Pujol (IGTP), Campus Can Ruti, Ctra de Can Ruti, Camí de les Escoles, s/n, 08916 Badalona, Barcelona, Spain
| | - Sérgio P. Camões
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Ivan Spasojevic
- Department of Medicine, Duke University School of Medicine and PK/PD Core Laboratory, Duke Cancer Institute, Duke University School of Medicine, Durham, NC 27710, USA
| | - Matilde Castro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal
| | - Joana P. Miranda
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal
| | - Filipa Amaro
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, Department of Biological Sciences, Laboratory of Toxicology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- UCIBIO, REQUIMTE, Laboratory of Toxicology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Joana Pinto
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, Department of Biological Sciences, Laboratory of Toxicology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- UCIBIO, REQUIMTE, Laboratory of Toxicology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Ana S. Fernandes
- Universidade Lusófona’s Research Center for Biosciences & Health Technologies (CBIOS), Campo Grande 376, 1749-024 Lisboa, Portugal
| | - Paula Guedes de Pinho
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, Department of Biological Sciences, Laboratory of Toxicology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- UCIBIO, REQUIMTE, Laboratory of Toxicology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Nuno G. Oliveira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal
| |
Collapse
|
3
|
Lee FS, Ney KE, Richardson AN, Oberley-Deegan RE, Wachs RA. Encapsulation of Manganese Porphyrin in Chondroitin Sulfate-A Microparticles for Long Term Reactive Oxygen Species Scavenging. Cell Mol Bioeng 2022; 15:391-407. [PMID: 36444349 PMCID: PMC9700555 DOI: 10.1007/s12195-022-00744-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 09/28/2022] [Indexed: 11/26/2022] Open
Abstract
Introduction Oxidative stress due to excess reactive oxygen species (ROS) is related to many chronic illnesses including degenerative disc disease and osteoarthritis. MnTnBuOE-2-PyP5+ (BuOE), a manganese porphyrin analog, is a synthetic superoxide dismutase mimetic that scavenges ROS and has established good treatment efficacy at preventing radiation-induced oxidative damage in healthy cells. BuOE has not been studied in degenerative disc disease applications and only few studies have loaded BuOE into drug delivery systems. The goal of this work is to engineer BuOE microparticles (MPs) as an injectable therapeutic for long-term ROS scavenging. Methods Methacrylated chondroitin sulfate-A MPs (vehicle) and BuOE MPs were synthesized via water-in-oil polymerization and the size, surface morphology, encapsulation efficiency and release profile were characterized. To assess long term ROS scavenging of BuOE MPs, superoxide scavenging activity was evaluated over an 84-day time course. In vitro cytocompatibility and cellular uptake were assessed on human intervertebral disc cells. Results BuOE MPs were successfully encapsulated in MACS-A MPs and exhibited a slow-release profile over 84 days. BuOE maintained high potency in superoxide scavenging after encapsulation and after 84 days of incubation at 37 °C as compared to naked BuOE. Vehicle and BuOE MPs (100 µg/mL) were non-cytotoxic on nucleus pulposus cells and MPs up to 23 µm were endocytosed. Conclusions BuOE MPs can be successfully fabricated and maintain potent superoxide scavenging capabilities up to 84-days. In vitro assessment reveals the vehicle and BuOE MPs are not cytotoxic and can be taken up by cells. Supplementary Information The online version contains supplementary material available at 10.1007/s12195-022-00744-w.
Collapse
Affiliation(s)
- Fei San Lee
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, 4240 Fair St, Lincoln, NE 68583-0900 USA
| | - Kayla E. Ney
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, 4240 Fair St, Lincoln, NE 68583-0900 USA
| | - Alexandria N. Richardson
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, 4240 Fair St, Lincoln, NE 68583-0900 USA
| | - Rebecca E. Oberley-Deegan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198 USA
| | - Rebecca A. Wachs
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, 4240 Fair St, Lincoln, NE 68583-0900 USA
| |
Collapse
|
4
|
Costa JG, Saraiva N, Batinic-Haberle I, Castro M, Oliveira NG, Fernandes AS. The SOD Mimic MnTnHex-2-PyP 5+ Reduces the Viability and Migration of 786-O Human Renal Cancer Cells. Antioxidants (Basel) 2019; 8:antiox8100490. [PMID: 31627290 PMCID: PMC6826590 DOI: 10.3390/antiox8100490] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 10/08/2019] [Accepted: 10/12/2019] [Indexed: 12/28/2022] Open
Abstract
Clear-cell renal carcinoma (ccRCC) is the most common type of renal cancer. The importance of oxidative stress in the context of this disease has been described, although there is only little information concerning the role of superoxide dismutase (SOD) enzymes. The importance of SOD in different pathological conditions promoted the development of SOD mimics (SODm). As such, manganese(III) porphyrins can mimic the natural SOD enzymes and scavenge different reactive oxygen species (ROS), thus modulating the cellular redox status. In this study, the exposure of 786-O human renal cancer cells to MnTnHex-2-PyP5+ (MnP), a very promising SODm, led to a concentration and time-dependent decrease in cell viability and in the cell proliferation indices, as well as to an increase in apoptosis. No relevant effects in terms of micronuclei formation were observed. Moreover, the exposure to MnP resulted in a concentration-dependent increase in intracellular ROS, presumably due to the generation of H2O2 by the inherent redox mechanisms of MnP, along with the limited ability of cancer cells to detoxify this species. Although the MnP treatment did not result in a reduction in the collective cell migration, a significant decrease in chemotactic migration was observed. Overall, these results suggest that MnP has a beneficial impact on reducing renal cancer cell viability and migration and warrant further studies regarding SODm-based therapeutic strategies against human renal cancer.
Collapse
Affiliation(s)
- João G Costa
- Research Center for Biosciences & Health Technologies (CBIOS), Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal.
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Nuno Saraiva
- Research Center for Biosciences & Health Technologies (CBIOS), Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal.
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, USA.
| | - Matilde Castro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Nuno G Oliveira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Professor Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Ana S Fernandes
- Research Center for Biosciences & Health Technologies (CBIOS), Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal.
| |
Collapse
|
5
|
Abstract
Reactive Oxygen Species (ROS) are chemically reactive chemical species containing oxygen. The redox status of a cell is function of the relative concentrations of oxidized and reduced forms of proteins, enzymes, ROS, molecules containing thiol and other factors. In the organism, the redox balance is based on the generation and elimination of ROS produced by endogenous and exogenous sources. All living organisms must maintain their redox equilibrium to survive and proliferate. Enzymatic and molecular pathways control ROS levels tightly but differentially depending on the type of cell. This review is an overview of various molecules that modulate ROS production/detoxification and have a synergistic action with the chemotherapies to kill cancer cells while preserving normal cells to avoid anticancer drugs side effects, allowing a better therapeutic index of the anticancer treatments.
Collapse
Affiliation(s)
- Carole Nicco
- Department "Development, Reproduction and Cancer", Cochin Institute, INSERM U1016, University Paris Descartes, Paris 75014, France.
| | - Frédéric Batteux
- Department "Development, Reproduction and Cancer", Cochin Institute, INSERM U1016, University Paris Descartes, Paris 75014, France.
| |
Collapse
|
6
|
Shin SW, Choi C, Lee GH, Son A, Kim SH, Park HC, Batinic-Haberle I, Park W. Mechanism of the Antitumor and Radiosensitizing Effects of a Manganese Porphyrin, MnHex-2-PyP. Antioxid Redox Signal 2017; 27:1067-1082. [PMID: 28358581 DOI: 10.1089/ars.2016.6889] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
AIMS Cationic manganese (Mn)-substituted N-pyridylporphyrin-based potent mimics of the family of superoxide dismutases (SODs) protect normal tissues from injury related to ionizing radiation (IR) by reducing levels of reactive oxygen and nitrogen species (ROS/RNS). Furthermore, Mn-porphyrins have demonstrated antitumor and radiosensitizing effects on cancer cells by promoting IR-induced tumor vasculature damage and apoptotic processes. In this study, we explored the underlying mechanisms of Mn-porphyrin-mediated tumor radiosensitization using murine mammary carcinoma 4T1 and melanoma B16 cells in vitro and in vivo. RESULTS Combination treatment with MnTnHex-2-PyP and IR substantially reduced cell viability, clonogenic cell survival, and DNA damage repair and synergistically increased IR-induced apoptosis of 4T1 and B16 cells. MnTnHex-2-PyP in combination with IR caused a significant delay in growth of 4T1 and B16 xenograft tumors. MnTnHex-2-PyP dose-dependently enhanced IR-mediated production of H2O2-derived species, but not superoxide. Catalase overexpression reversed MnTnHex-2-PyP-enhanced ROS production and apoptosis. Demonstrated suppression of phosphorylation of several mitogen-activated protein (MAP) kinases and activation of NF-κB by MnTnHex-2-PyP/IR, which presumably inhibited activation of the antiapoptotic pathway, are in agreement with our other data on the apoptosis of cancer cells. Innovation and Conclusions: MnTnHex-2-PyP exerted a radiosensitizing effect on 4T1 and B16 tumor models in vitro and in vivo via pro-oxidative actions and therefore bears a large therapeutic potential. When combined with IR, it attenuated DNA damage repair and triggered a shift from prosurvival pathways to apoptotic cell death, likely due to increased ROS production and disturbed cellular redox balance, acting at the level of nuclear factor κB (NF-κB). Antioxid. Redox Signal. 27, 1067-1082.
Collapse
Affiliation(s)
- Sung-Won Shin
- 1 Department of Radiation Oncology, Samsung Medical Center , Seoul, Republic of Korea.,2 Sungkyunkwan University School of Medicine , Seoul, Republic of Korea
| | - Changhoon Choi
- 1 Department of Radiation Oncology, Samsung Medical Center , Seoul, Republic of Korea
| | - Ga-Haeng Lee
- 1 Department of Radiation Oncology, Samsung Medical Center , Seoul, Republic of Korea
| | - Arang Son
- 1 Department of Radiation Oncology, Samsung Medical Center , Seoul, Republic of Korea
| | - Su-Hyeon Kim
- 1 Department of Radiation Oncology, Samsung Medical Center , Seoul, Republic of Korea
| | - Hee Chul Park
- 1 Department of Radiation Oncology, Samsung Medical Center , Seoul, Republic of Korea.,2 Sungkyunkwan University School of Medicine , Seoul, Republic of Korea
| | - Ines Batinic-Haberle
- 3 Department of Radiation Oncology, Duke University School of Medicine , Durham, North Carolina
| | - Won Park
- 1 Department of Radiation Oncology, Samsung Medical Center , Seoul, Republic of Korea.,2 Sungkyunkwan University School of Medicine , Seoul, Republic of Korea
| |
Collapse
|
7
|
Stancic A, Filipovic M, Ivanovic-Burmazovic I, Masovic S, Jankovic A, Otasevic V, Korac A, Buzadzic B, Korac B. Early energy metabolism-related molecular events in skeletal muscle of diabetic rats: The effects of l-arginine and SOD mimic. Chem Biol Interact 2017; 272:188-96. [PMID: 28483572 DOI: 10.1016/j.cbi.2017.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 04/20/2017] [Accepted: 05/03/2017] [Indexed: 01/17/2023]
Abstract
Considering the vital role of skeletal muscle in control of whole-body metabolism and the severity of long-term diabetic complications, we aimed to reveal the molecular pattern of early diabetes-related skeletal muscle phenotype in terms of energy metabolism, focusing on regulatory mechanisms, and the possibility to improve it using two redox modulators, l-arginine and superoxide dismutase (SOD) mimic. Alloxan-induced diabetic rats (120 mg/kg) were treated with l-arginine or the highly specific SOD mimic, M40403, for 7 days. As appropriate controls, non-diabetic rats received the same treatments. We found that l-arginine and M40403 restored diabetes-induced impairment of phospho-5'-AMP-activated protein kinase α (AMPKα) signaling by upregulating AMPKα protein itself and its downstream effectors, peroxisome proliferator-activated receptor-γ coactivator-1α and nuclear respiratory factor 1. Also, there was a restitution of the protein levels of oxidative phosphorylation components (complex I, complex II and complex IV) and mitofusin 2. Furthermore, l-arginine and M40403 induced translocation of glucose transporter 4 to the membrane and upregulation of protein of phosphofructokinase and acyl coenzyme A dehydrogenase, diminishing negative diabetic effects on limiting factors of glucose and lipid metabolism. Both treatments abolished diabetes-induced downregulation of sarcoplasmic reticulum calcium-ATPase proteins (SERCA 1 and 2). Similar effects of l-arginine and SOD mimic treatments suggest that disturbances in the superoxide/nitric oxide ratio may be responsible for skeletal muscle mitochondrial and metabolic impairment in early diabetes. Our results provide evidence that l-arginine and SOD mimics have potential in preventing and treating metabolic disturbances accompanying this widespread metabolic disease.
Collapse
|
8
|
Yulyana Y, Tovmasyan A, Ho IAW, Sia KC, Newman JP, Ng WH, Guo CM, Hui KM, Batinic-Haberle I, Lam PYP. Redox-Active Mn Porphyrin-based Potent SOD Mimic, MnTnBuOE-2-PyP(5+), Enhances Carbenoxolone-Mediated TRAIL-Induced Apoptosis in Glioblastoma Multiforme. Stem Cell Rev Rep 2016; 12:140-55. [PMID: 26454429 DOI: 10.1007/s12015-015-9628-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Glioblastoma multiforme is the most malignant tumor of the brain and is challenging to treat due to its highly invasive nature and heterogeneity. Malignant brain tumor displays high metabolic activity which perturbs its redox environment and in turn translates to high oxidative stress. Thus, pushing the oxidative stress level to achieve the maximum tolerable threshold that induces cell death is a potential strategy for cancer therapy. Previously, we have shown that gap junction inhibitor, carbenoxolone (CBX), is capable of enhancing tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) -induced apoptosis in glioma cells. Since CBX is known to induce oxidative stress, we hypothesized that the addition of another potent mediator of oxidative stress, powerful SOD mimic MnTnBuOE-2-PyP(5+) (MnBuOE), could further enhance TRAIL-driven therapeutic efficacy in glioma cells. Our results showed that combining TRAIL + CBX with MnBuOE significantly enhances cell death of glioma cell lines and this enhancement could be further potentiated by CBX pretreatment. MnBuOE-driven cytotoxicity is due to its ability to take advantage of oxidative stress imposed by CBX + TRAIL system, and enhance it in the presence of endogenous reductants, ascorbate and thiol, thereby producing cytotoxic H2O2, and in turn inducing death of glioma cells but not normal astrocytes. Most importantly, combination treatment significantly reduces viability of TRAIL-resistant Asian patient-derived glioma cells, thus demonstrating the potential clinical use of our therapeutic system. It was reported that H2O2 is involved in membrane depolarization-based sensitization of cancer cells toward TRAIL. MnBuOE is entering Clinical Trials as a normal brain radioprotector in glioma patients at Duke University increasing Clinical relevance of our studies.
Collapse
Affiliation(s)
- Yulyana Yulyana
- Laboratory of Cancer Gene Therapy, Cellular and Molecular Research Division, Humphrey Oei Institute of Cancer Research, National Cancer Centre, 11 Hospital Drive, Singapore, 169610, Singapore
| | - Artak Tovmasyan
- Department of Radiation Oncology, Duke University Medical Center, Research Drive 281b/285 MSRB I, Box 3455, Durham, NC, 27710, USA
| | - Ivy A W Ho
- Laboratory of Cancer Gene Therapy, Cellular and Molecular Research Division, Humphrey Oei Institute of Cancer Research, National Cancer Centre, 11 Hospital Drive, Singapore, 169610, Singapore.,National Neuroscience Institute, Singapore, Singapore
| | - Kian Chuan Sia
- Laboratory of Cancer Gene Therapy, Cellular and Molecular Research Division, Humphrey Oei Institute of Cancer Research, National Cancer Centre, 11 Hospital Drive, Singapore, 169610, Singapore.,National University of Singapore, Singapore, Singapore
| | - Jennifer P Newman
- Laboratory of Cancer Gene Therapy, Cellular and Molecular Research Division, Humphrey Oei Institute of Cancer Research, National Cancer Centre, 11 Hospital Drive, Singapore, 169610, Singapore
| | - Wai Hoe Ng
- Department of Neurosurgery, National Neuroscience Institute, Singapore, Singapore
| | - Chang Ming Guo
- Department of Orthopedics, Singapore General Hospital, Singapore, Singapore
| | - Kam Man Hui
- Bek Chai Heah Laboratory of Cancer Genomics, Cellular and Molecular Research Division, Humphrey Oei Institute of Cancer Research, National Cancer Centre of Singapore, Singapore, Singapore.,Cancer and Stem Cells Biology Program, Duke-NUS Graduate Medical School, Singapore, Singapore.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Institute of Molecular and Cell Biology, A*STAR, Proteos, Singapore
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, Duke University Medical Center, Research Drive 281b/285 MSRB I, Box 3455, Durham, NC, 27710, USA. .,Duke Cancer Institute, Duke University Medical Centre, Durham, NC, USA.
| | - Paula Y P Lam
- Laboratory of Cancer Gene Therapy, Cellular and Molecular Research Division, Humphrey Oei Institute of Cancer Research, National Cancer Centre, 11 Hospital Drive, Singapore, 169610, Singapore. .,Cancer and Stem Cells Biology Program, Duke-NUS Graduate Medical School, Singapore, Singapore. .,Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
| |
Collapse
|
9
|
Li AM, Martins J, Tovmasyan A, Valentine JS, Batinic-Haberle I, Spasojevic I, Gralla EB. Differential localization and potency of manganese porphyrin superoxide dismutase-mimicking compounds in Saccharomyces cerevisiae. Redox Biol 2014; 3:1-6. [PMID: 25462059 PMCID: PMC4299968 DOI: 10.1016/j.redox.2014.09.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 09/14/2014] [Accepted: 09/15/2014] [Indexed: 11/04/2022] Open
Abstract
Cationic Mn(III) porphyrin complexes based on MnTM-2-PyP are among the most promising superoxide dismutase (SOD) mimicking compounds being considered as potential anti-inflammatory drugs. We studied four of these active compounds in the yeast Saccharomyces cerevisiae, MnTM-2-PyP, MnTE-2-PyP, MnTnHex-2-PyP, and MnTnBu-2-PyP, each of which differs only in the length of its alkyl substituents. Each was active in improving the aerobic growth of yeast lacking SOD (sod1∆) in complete medium, and the efficacy of each mimic was correlated with its characteristic catalytic activity. We also studied the partitioning of these compounds between mitochondria and cytosol and found that the more hydrophobic members of the series accumulated in the mitochondria. Moreover, the degree to which a mimic mitigated the sod1Δ auxotrophic phenotype for lysine relative to its auxotrophic phenotype for methionine depended upon its level of lipophilicity-dependent accumulation inside the mitochondria. We conclude that localization within the cell is an important factor in biological efficacy in addition to the degree of catalytic activity, and we discuss possible explanations for this effect. Cellular distribution of Mn porphyrin SOD mimics correlates with their lipophilicity. Higher lipophilicity directs Mn porphyrin SOD mimics to the mitochondria. In sod1∆ yeast, SOD mimics in mitochondria increased rescue of Lys, not Met auxotrophy. A mitochondrial target is involved in the sod1∆-dependent Lys auxotrophy.
Collapse
Affiliation(s)
- Alice Ma Li
- Department of Chemistry and Biochemistry, UCLA, 607 Charles E Young Drive East, Los Angeles, CA 90095-1569, USA
| | - Jake Martins
- Department of Chemistry and Biochemistry, UCLA, 607 Charles E Young Drive East, Los Angeles, CA 90095-1569, USA
| | - Artak Tovmasyan
- Department of Radiation Oncology, Duke University Medical Center, NC 27710, USA
| | - Joan S Valentine
- Department of Chemistry and Biochemistry, UCLA, 607 Charles E Young Drive East, Los Angeles, CA 90095-1569, USA
| | | | - Ivan Spasojevic
- Department of Medicine and PK/PD Shared Resource of Duke Cancer Institute, Duke University Medical Center, NC 27710, USA
| | - Edith B Gralla
- Department of Chemistry and Biochemistry, UCLA, 607 Charles E Young Drive East, Los Angeles, CA 90095-1569, USA.
| |
Collapse
|
10
|
Archambeau JO, Tovmasyan A, Pearlstein RD, Crapo JD, Batinic-Haberle I. Superoxide dismutase mimic, MnTE-2-PyP(5+) ameliorates acute and chronic proctitis following focal proton irradiation of the rat rectum. Redox Biol 2013; 1:599-607. [PMID: 24363995 PMCID: PMC3863774 DOI: 10.1016/j.redox.2013.10.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 10/12/2013] [Accepted: 10/14/2013] [Indexed: 01/05/2023] Open
Abstract
Radiation proctitis, an inflammation and damage to the lower part of colon, is a common adverse event of the radiotherapy of tumors in the abdominal and pelvic region (colon, prostate, cervical). Several Mn(III) porphyrin-based superoxide dismutase mimics have been synthesized and successfully evaluated in preclinical models as radioprotectants. Here we report for the first time the remarkable rectal radioprotection of frequently explored Mn(III) meso-tetrakis(N-ethylpyridinium-2-yl)porphyrin, MnTE-2-PyP(5+). A batch prepared in compliance with good manufacturing practice (GMP), which has good safety/toxicity profile, was used for this study. MnTE-2-PyP(5+) was given subcutaneously at 5 mg/kg, either 1 h before or 1 h after irradiation, with additional drug administered at weekly intervals thereafter. MnTE-2-PyP(5+) ameliorated both acute and chronic radiation proctitis in male Sprague-Dawley rats irradiated with 20-30 Gy protons delivered to 2.5 cm span of rectum using spread-out Bragg peak of a proton treatment beam. Focal irradiation of the rectum produced acute proctitis, which healed, followed by chronic rectal dilation and symptomatic proctitis. MnTE-2-PyP(5+) protected rectal mucosa from radiation-induced crypt loss measured 10 days post-irradiation. Significant effects were observed with both pre- and post-treatment regimens. However, only MnTE-2-PyP(5+) pre-treatment, but not post-treatment, prevented the development of rectal dilation, indicating that proper dosing regimen is critical for radioprotection. The pre-treatment also prevented or delayed the development of chronic proctitis depending on the radiation dose. Further work aimed at developing MnTE-2-PyP(5+) and similar drugs as adjunctive agents for radiotherapy of pelvic tumors is warranted. The present study substantiates the prospects of employing this and similar analogs in preserving normal tissue during cancer radiation as well as any other radiation exposure.
Collapse
Key Words
- AP-1, activator protein-1
- CGE, cobalt gray equivalent
- GSH, glutathione
- HIF-1α, hypoxia inducible factor-1
- Mn porphyrin
- MnP, Mn(III) porphyrins
- MnTDE-2-ImP5+, Mn(III) meso-tetrakis(N,N’-diethylimidazolium-2-yl)porphyrin (AEOL10150)
- MnTE-2-PyP5+
- MnTE-2-PyP5+, Mn(III) meso-tetrakis(N-ethylpyridinium-2-yl)porphyrin (AEOL10113, BMX-010)
- MnTM-2-PyP5+, Mn(III) meso-tetrakis(N-methylpyridinium-2-yl)porphyrin (AEOL10112)
- MnTnBuOE-2-PyP5+, Mn(III) meso-tetrakis(N-n-butoxyethylpyridinium-2-yl)porphyrin
- MnTnHex-2-PyP5+, Mn(III) meso-tetrakis(N-n-hexylpyridinium-2-yl)porphyrin (BMX-001)
- NF-κB, nuclear factor κB
- PT, proton therapy
- Proton beam therapy
- Radiation proctitis
- Radioprotector
- SOD mimic
- SOD, superoxide dismutase
- SP-1, specificity protein-1
- TF, transcription factor
- kcat(O2−), the rate constant for the catalysis of O2− dismutation by Mn porphyrin or SOD enzyme
Collapse
Affiliation(s)
- John O Archambeau
- Department of Radiation Medicine, Loma Linda University, Loma Linda, CA, USA
| | - Artak Tovmasyan
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Robert D Pearlstein
- Department of Surgery (Neurosurgery), Duke University School of Medicine, Durham, NC 27710, USA
| | - James D Crapo
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Denver, CO 80206, USA
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, Duke University School of Medicine, Durham, NC 27710, USA
| |
Collapse
|
11
|
Stančić A, Otašević V, Janković A, Vučetić M, Ivanović-Burmazović I, Filipović MR, Korać A, Markelić M, Veličković K, Golić I, Buzadžić B, Korać B. Molecular basis of hippocampal energy metabolism in diabetic rats: the effects of SOD mimic. Brain Res Bull 2013; 99:27-33. [PMID: 24084255 DOI: 10.1016/j.brainresbull.2013.09.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 09/23/2013] [Indexed: 01/22/2023]
Abstract
Hippocampal structural changes associated with diabetes-related cognitive impairments are well described, but their molecular background remained vague. We examined whether/how diabetes alters molecular basis of energy metabolism in hippocampus readily after diabetes onset, with special emphasis on its redox-sensitivity. To induce diabetes, adult Mill Hill hybrid hooded rats received a single alloxan dose (120 mg/kg). Both non-diabetic and diabetic groups were further divided in two subgroups receiving (i) or not (ii) superoxide dismutase (SOD) mimic, [Mn(II)(pyane)Cl2] for 7 days, i.p. Treatment of the diabetic animals started after blood glucose level ≥12 mM. Diabetes decreased protein levels of oxidative phosphorylation components: complex III and ATP synthase. In contrast, protein amounts of glyceraldehyde-3-phosphate dehydrogenase, pyruvate dehydrogenase, and hypoxia-inducible factor-1α - the key regulator of energy metabolism in stress conditions, were higher in diabetic animals. Treatment with SOD mimic restored/increased the levels of oxidative phosphorylation components and returned hypoxia-inducible factor-1α to control level, while diabetes-induced up-regulation of glycolytic enzyme, glyceraldehyde-3-phosphate dehydrogenase, was additionally stimulated. To conclude, our results provide insight into the earliest molecular changes of energy-producing pathways in diabetes that may account for structural/functional disturbance of hippocampus, seen during disease progression. Also, data suggest [Mn(II)(pyane)Cl2] as potential therapeutic agent in cutting-edge approaches to threat this widespread metabolic disorder.
Collapse
Affiliation(s)
- Ana Stančić
- University of Belgrade, Institute for Biological Research "Siniša Stanković", Department of Physiology, Belgrade, Serbia
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Ali DK, Oriowo M, Tovmasyan A, Batinic-Haberle I, Benov L. Late administration of Mn porphyrin-based SOD mimic enhances diabetic complications. Redox Biol 2013; 1:457-66. [PMID: 24191241 PMCID: PMC3815015 DOI: 10.1016/j.redox.2013.09.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 09/11/2013] [Accepted: 09/12/2013] [Indexed: 01/12/2023] Open
Abstract
Mn(III) N-alkylpyridylporphyrins (MnPs) have demonstrated protection in various conditions where increased production of reactive oxygen/reactive nitrogen species (ROS/RNS), is a key pathological factors. MnPs can produce both pro-oxidative and antioxidative effects depending upon the cellular redox environment that they encounter. Previously we reported (Free Radic. Res. 39: 81–8, 2005) that when the treatment started at the onset of diabetes, Mn(III) meso-tetrakis(N-methylpyridinium-2-yl)porphyrin, MnTM-2-PyP5+ suppressed diabetes-induced oxidative stress. Diabetes, however, is rarely diagnosed at its onset. The aim of this study was to investigate if MnTM-2-PyP5+ can suppress oxidative damage and prevent diabetic complications when administered more than a week after the onset of diabetes. Diabetes was induced by streptozotocin. The MnP-based treatment started 8 days after the onset of diabetes and continued for 2 months. The effect of the treatment on activities of glutathione peroxidase, superoxide dismutase, catalase, glutathione reductase, glucose-6-phosphate dehydrogenase, glyceraldehyde-3-phosphate dehydrogenase, and glyoxalases I and II as well as malondialdehyde and GSH/GSSG ratio were determined in kidneys. Kidney function was assessed by measuring lysozyme and total protein in urine and blood urea nitrogen. Vascular damage was evaluated by assessing vascular reactivity. Our data showed that delayed administration of MnTM-2-PyP5+ did not protect against oxidative damage and did not prevent diabetic complications. Moreover, MnTM-2-PyP5+ contributed to the kidney damage, which seems to be a consequence of its pro-oxidative action. Such outcome can be explained by advanced oxidative damage which already existed at the moment the therapy with MnP started. The data support the concept that the overall biological effect of a redox-active MnP is determined by (i) the relative concentrations of oxidants and reductants, i.e. the cellular redox environment and (ii) MnP biodistribution. Mn porphyrins (MnP) are among the most potent SOD mimics. MnP suppressed diabetes-induced oxidative stress if applied at the onset of diabetes. Delayed administration of MnP augmented oxidative stress and diabetic complications. The overall in vivo effect of MnP depends on its redox environment.
Collapse
Affiliation(s)
- Dana K. Ali
- Department of Biochemistry, Faculty of Medicine, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait
| | - Mabayoje Oriowo
- Department of Pharmacology, Faculty of Medicine, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait
| | - Artak Tovmasyan
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC 27710, USA
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC 27710, USA
- Correspondence to: Department of Radiation Oncology, Duke University Medical Center, Research Drive, 281b/285, MSRB I, Box 3455, Durham, NC 27710, USA. Tel.: +1 919 684 2101; fax: +1 919 684 8718.
| | - Ludmil Benov
- Department of Biochemistry, Faculty of Medicine, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait
- Corresponding author. Tel.: +965 2531 9489; fax: +965 2533 8908.
| |
Collapse
|
13
|
Abstract
Flavonoids are among the most investigated phytochemicals due to their pharmacological and therapeutic activities. Their ability to chelate with metal ions has resulted in the emergence of a new category of molecules with a broader spectrum of pharmacological activities. However, the biological significance of these flavonoid-metal ion complexes is yet to be completely explored. Moreover, no concerted efforts have been made to elucidate their molecular targets and mechanisms of action. This review attempts to provide a snapshot of the various biological activities reported for flavonoid-metal ion complexes and their potential as therapeutic agents. Understanding the mechanism of action and the influence of structure will provide a strong basis to design novel flavonoid-metal ion complexes of therapeutic significance.
Collapse
Affiliation(s)
- Stalin Selvaraj
- Centre for Nanotechnology and Advanced Biomaterials, School of Chemical and Biotechnology, SASTRA University, Thanjavur, 613 401, India
| | | | | | | | | |
Collapse
|
14
|
Campo GM, Avenoso A, D'Ascola A, Scuruchi M, Nastasi G, Micali A, Puzzolo D, Pisani A, Calatroni A, Campo S. The SOD mimic MnTM-2-PyP(5+) reduces hyaluronan degradation-induced inflammation in mouse articular chondrocytes stimulated with Fe (II) plus ascorbate. Int J Biochem Cell Biol 2013; 45:1610-9. [PMID: 23692848 DOI: 10.1016/j.biocel.2013.05.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 05/04/2013] [Accepted: 05/09/2013] [Indexed: 02/07/2023]
Abstract
In pathological conditions, oxidative burst generates hyaluronan (HA) fragmentation with a consequent increase in the number of small HA oligosaccharides. These fragments are able to stimulate an inflammatory response in different cell types by activating the CD44 and the toll-like receptors 4 (TLR-4) and 2 (TLR-2). The stimulation of CD44 and TLRs in turn activates the NF-kB which induces the production of several pro-inflammatory mediators that amplify and perpetuate inflammation. We aimed to study the antioxidant effect of the SOD mimic, synthetic manganese porphyrin, Mn(III) 5,10,15,20-tetrakis(N-methylpyridinium-2-yl)porphyrin (MnTM-2-PyP(5+)) on preventing HA degradation in mouse articular chondrocytes stimulated with Fe (II) plus ascorbate. Fe (II) plus ascorbate stimulation induced oxidative burst confirmed by high levels of hydroxyl radical/peroxynitrite production, increased lipid peroxidation and HA degradation. HA fragments highly induced mRNA expression and the related protein production of CD44, TLR-4 and TLR-2, NF-kB activation and significantly up-regulated the inflammatory cytokines, tumor necrosis factor alpha (TNF-alpha), interleukin-1beta (IL-1beta), and other pro-inflammatory mediators, i.e. matrix metalloprotease 13 (MMP-13) and inducible nitric oxide synthase (iNOS). Treatment of cells with MnTM-2-PyP(5+)was able to attenuate oxidative burst, HA degradation and NF-kB activation, and markedly decreased mRNA expression of CD44, and TLRs and the related protein synthesis, as well as the levels of up-regulated inflammatory mediators. Adding a specific HA-blocking peptide (PEP-1) to cells significantly reduced all the inflammatory parameters up-regulated by Fe (II) plus ascorbate, and increased MnTM-2-PyP(5+) activity. These findings suggest that HA degradation plays a key role in the initial inflammatory response of cartilage and antioxidants and could be a useful tool to prevent the propagation of this mechanism.
Collapse
Affiliation(s)
- Giuseppe M Campo
- Department of Biomedical Sciences and Morphological and Functional Images, School of Medicine, University of Messina, 98125 Messina, Italy.
| | | | | | | | | | | | | | | | | | | |
Collapse
|