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Şirin S. Lactic Acid Bacteria-Derived Exopolysaccharides Mitigate the Oxidative Response via the NRF2-KEAP1 Pathway in PC12 Cells. Curr Issues Mol Biol 2023; 45:8071-8090. [PMID: 37886953 PMCID: PMC10605729 DOI: 10.3390/cimb45100510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 09/25/2023] [Accepted: 09/30/2023] [Indexed: 10/28/2023] Open
Abstract
Parabiotics, including L-EPSs, have been administered to patients with neurodegenerative disorders. However, the antioxidant properties of L-EPSs against H2O2-induced oxidative stress in PC12 cells have not been studied. Herein, we aimed to investigate the antioxidant properties of the L-EPSs, their plausible targets, and their mechanism of action. We first determined the amount of L-EPSs in Lactobacillus delbrueckii ssp. bulgaricus B3 and Lactiplantibacillus plantarum GD2 using spectrophotometry. Afterwards, we studied their effects on TDH, TOS/TAS, antioxidant enzyme activities, and intracellular ROS level. Finally, we used qRT-PCR and ELISA to determine the effects of L-EPSs on the NRF2-KEAP1 pathway. According to our results, the L-EPS groups exhibited significantly higher total thiol activity, native thiol activity, disulfide activity, TAS levels, antioxidant enzyme levels, and gene expression levels (GCLC, HO-1, NRF2, and NQO1) than did the H2O2 group. Additionally, the L-EPS groups caused significant reductions in TOS levels and KEAP1 gene expression levels compared with those in the H2O2 group. Our results indicate that H2O2-induced oxidative stress was modified by L-EPSs. Thus, we revealed that L-EPSs, which regulate H2O2-induced oxidative stress, could have applications in the field of neurochemistry.
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Affiliation(s)
- Seda Şirin
- Department of Biology, Faculty of Science, Gazi University, Teknikokullar, 06500 Ankara, Turkey
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2
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Crescitelli MC, Simon I, Ferrini L, Calvo H, Torres AM, Cabero I, Panedas MM, Rauschemberger MB, Aguirre MV, Rodríguez JP, Hernández M, Nieto ML. Anti-Neuroinflammatory Potential of a Nectandra angustifolia ( Laurel Amarillo) Ethanolic Extract. Antioxidants (Basel) 2023; 12:antiox12020232. [PMID: 36829791 PMCID: PMC9952224 DOI: 10.3390/antiox12020232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
Microglia, the resident macrophage-like population in the CNS, plays an important role in the pathogenesis of many neurodegenerative disorders. Nectandra genus is known to produce different metabolites with anti-inflammatory, anti-oxidant and analgesic properties. Although the species Nectandra angustifolia is popularly used for the treatment of different types of inflammatory processes, its biological effects on neuroinflammation have not yet been addressed. In this study, we have investigated the role of a Nectandra angustifolia ethanolic extract (NaE) in lipopolysaccharide (LPS)-induced neuroinflammation in vitro and in vivo. In LPS-activated BV2 microglial cells, NaE significantly reduced the induced proinflammatory mediators TNF-α, IL-1β, IL-6, COX-2 and iNOS, as well as NO accumulation, while it promoted IL-10 secretion and YM-1 expression. Likewise, reduced CD14 expression levels were detected in microglial cells in the NaE+LPS group. NaE also attenuated LPS-induced ROS and lipid peroxidation build-up in BV2 cells. Mechanistically, NaE prevented NF-κB and MAPKs phosphorylation, as well as NLRP3 upregulation when added before LPS stimulation, although it did not affect the level of some proteins related to antioxidant defense such as Keap-1 and HO-1. Additionally, we observed that NaE modulated some activated microglia functions, decreasing cell migration, without affecting their phagocytic capabilities. In LPS-injected mice, NaE pre-treatment markedly suppressed the up-regulated TNF-α, IL-6 and IL-1β mRNA expression induced by LPS in brain. Our findings indicate that NaE is beneficial in preventing the neuroinflammatory response both in vivo and in vitro. NaE may regulate microglia homeostasis, not only restraining activation of LPS towards the M1 phenotype but promoting an M2 phenotype.
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Affiliation(s)
- María Carla Crescitelli
- Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), CSIC-Universidad de Valladolid, 47003 Valladolid, Spain
- Cátedra de Inmunología, Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR), Universidad Nacional del Sur (UNS), Consejo de Investigaciones Científicas y Técnicas (CONICET), Departamento de Biología, Bioquímica y Farmacia, San Juan 670, 8000 Bahía Blanca, Argentina
| | - Inmaculada Simon
- Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), CSIC-Universidad de Valladolid, 47003 Valladolid, Spain
| | - Leandro Ferrini
- Laboratorio de Investigaciones Bioquímicas de La Facultad de Medicina (LIBIM), Instituto de Química Básica y Aplicada del NEA, (IQUIBA NEA-UNNE-CONICET), Facultad de Medicina, Universidad Nacional del Nordeste, Corrientes 3400, Argentina
- Laboratorio de Productos Naturales Prof. Armando Ricciardi (LabProdNat), Instituto de Química Básica y Aplicada del NEA, (IQUIBA NEA-UNNE-CONICET), Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Corrientes 3400, Argentina
| | - Hugo Calvo
- Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), CSIC-Universidad de Valladolid, 47003 Valladolid, Spain
| | - Ana M. Torres
- Laboratorio de Investigaciones Bioquímicas de La Facultad de Medicina (LIBIM), Instituto de Química Básica y Aplicada del NEA, (IQUIBA NEA-UNNE-CONICET), Facultad de Medicina, Universidad Nacional del Nordeste, Corrientes 3400, Argentina
- Laboratorio de Productos Naturales Prof. Armando Ricciardi (LabProdNat), Instituto de Química Básica y Aplicada del NEA, (IQUIBA NEA-UNNE-CONICET), Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Corrientes 3400, Argentina
| | - Isabel Cabero
- Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), CSIC-Universidad de Valladolid, 47003 Valladolid, Spain
| | - Mónica Macías Panedas
- Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), CSIC-Universidad de Valladolid, 47003 Valladolid, Spain
| | - Maria B. Rauschemberger
- Cátedra de Inmunología, Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR), Universidad Nacional del Sur (UNS), Consejo de Investigaciones Científicas y Técnicas (CONICET), Departamento de Biología, Bioquímica y Farmacia, San Juan 670, 8000 Bahía Blanca, Argentina
| | - Maria V. Aguirre
- Laboratorio de Investigaciones Bioquímicas de La Facultad de Medicina (LIBIM), Instituto de Química Básica y Aplicada del NEA, (IQUIBA NEA-UNNE-CONICET), Facultad de Medicina, Universidad Nacional del Nordeste, Corrientes 3400, Argentina
| | - Juan Pablo Rodríguez
- Laboratorio de Investigaciones Bioquímicas de La Facultad de Medicina (LIBIM), Instituto de Química Básica y Aplicada del NEA, (IQUIBA NEA-UNNE-CONICET), Facultad de Medicina, Universidad Nacional del Nordeste, Corrientes 3400, Argentina
| | - Marita Hernández
- Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), CSIC-Universidad de Valladolid, 47003 Valladolid, Spain
| | - María Luisa Nieto
- Instituto de Biomedicina y Genética Molecular de Valladolid (IBGM), CSIC-Universidad de Valladolid, 47003 Valladolid, Spain
- Correspondence: ; Tel.: +34-983184836
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3
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ALNasser MN, Mellor IR. Neuroprotective activities of acai berries (Euterpe sp.): A review. JOURNAL OF HERBMED PHARMACOLOGY 2022. [DOI: 10.34172/jhp.2022.21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Dietary interventions rich in fruits and vegetables in aging people can reverse or mitigate age-related cognitive declines, delay the onset of neurodegenerative diseases (NDDs), and provide long-term health dividends. The novel food, popularly known as "Acai", is a berry belonging to the Euterpe genus of tropical palms trees and natively found in South America. Euterpe oleracea has been given much attention among scientists due to its high antioxidant capacity compared to other fruits and berries. Additionally, acai pulp composition analysis found that it contains various biologically active phytochemicals. In this review, we focused on current evidence relating to acai berry neuroprotection mechanisms and its efficacy in preventing or reversing neurodegeneration and age-related cognitive decline. A number of studies have illustrated the potential neuroprotective properties of acai berries. They have shown that their chemical extracts have antioxidant and anti-inflammatory properties and maintain proteins, calcium homeostasis, and mitochondrial function. Moreover, acai berry extract offers other neuromodulatory mechanisms, including anticonvulsant, antidepressant, and anti-aging properties. This neuromodulation gives valuable insights into the acai pulp and its considerable pharmacological potential on critical brain areas involved in memory and cognition. The isolated chemical matrix of acai berries could be a new substitute in research for NDD medicine development. However, due to the limited number of investigations, there is a need for further efforts to establish studies that enable progressing to clinical trials to consequently prove and ratify the therapeutic potential of this berry for several incurable NDDs.
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Affiliation(s)
- Maryam N. ALNasser
- School of Life Sciences, Faculty of Medicine and Health Sciences, University of Nottingham, Nottingham, United Kingdom
- Department of Biological Sciences, College of Science, King Faisal University, Saudi Arabia
| | - Ian R. Mellor
- School of Life Sciences, Faculty of Medicine and Health Sciences, University of Nottingham, Nottingham, United Kingdom
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4
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Kim MH, Kim DY, Lee HJ, Park YH, Huh JW, Lee DS. Comparison of the protective effect of cytosolic and mitochondrial Peroxiredoxin 5 against glutamate-induced neuronal cell death. Redox Rep 2021; 26:53-61. [PMID: 33719938 PMCID: PMC7971343 DOI: 10.1080/13510002.2021.1901028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objectives: Although glutamate is an essential factor in the neuronal system, excess glutamate can produce excitotoxicity. We previously reported that Peroxiredoxin 5 (Prx5) protects neuronal cells from glutamate toxicity via its antioxidant effects. However, it is unclear whether cytosolic or mitochondrial Prx5 provides greater neuroprotection. Here, we investigated differences in the neuroprotective effects of cytosolic and mitochondrial Prx5. Methods: We analyzed patterns of cytosolic and mitochondrial H2O2 generation in glutamate toxicity using HyPer protein. And then, we confirmed the change of intracellular ROS level and apoptosis with respective methods. The mitochondrial dynamics was assessed with confocal microscope imaging and western blotting. Results: We found that the level of mitochondrial H2O2 greatly increased compared to cytosolic H2O2 and it affected cytosolic H2O2 generation after glutamate treatment. In addition, we confirmed that mitochondrial Prx5 provides more effective neuroprotection than cytosolic Prx5. Discussion: Overall, our study reveals the mechanisms of cytosolic and mitochondrial ROS in glutamate toxicity. Our findings suggest that mitochondrial ROS and Prx5 are attractive therapeutic targets and that controlling these factors be useful for the prevention of neurodegenerative diseases.
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Affiliation(s)
- Mi Hye Kim
- School of Life sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea.,College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Da Yeon Kim
- Department of Physiology, Stem Cell Research Center, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Hong Jun Lee
- College of Medicine, Chungbuk National University, Cheongju, Republic of Korea.,Research Institute, e-biogen Inc., Seoul, Republic of Korea
| | - Young-Ho Park
- Futuristic Animal Resource and Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, Republic of Korea
| | - Jae-Won Huh
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, Republic of Korea
| | - Dong-Seok Lee
- School of Life sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea.,College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
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5
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An in vitro protocol to study the effect of hyperglycemia on intracellular redox signaling in human retinal pigment epithelial (ARPE-19) cells. Mol Biol Rep 2019; 46:1263-1274. [DOI: 10.1007/s11033-019-04597-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 01/04/2019] [Indexed: 01/12/2023]
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6
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Cacciatore I, Marinelli L, Di Stefano A, Di Marco V, Orlando G, Gabriele M, Gatta DMP, Ferrone A, Franceschelli S, Speranza L, Patruno A. Chelating and antioxidant properties of l-Dopa containing tetrapeptide for the treatment of neurodegenerative diseases. Neuropeptides 2018; 71:11-20. [PMID: 29937392 DOI: 10.1016/j.npep.2018.06.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 05/04/2018] [Accepted: 06/17/2018] [Indexed: 12/12/2022]
Abstract
Neurodegenerative diseases share a common pathogenetic mechanism involving aggregation and deposition of misfolded proteins, oxidative stress, metal dyshomeostasis, and glutamate exicitotoxicity, which lead to progressive dysfunction of central nervous system (CNS). A potential strategy to counteract these deleterious events at neuronal level is represented by the employment of a novel class of multi-target therapeutic agents that selectively and simultaneously hit these targets In this paper, we report the metal binding and antioxidant properties of a novel metal-protein attenuating peptide, GSH-LD, a tetrapeptide obtained by linking glutathione, a well-known antioxidant tripeptide, to L-Dopa. Results demonstrated that GSH-LD possesses chelating capabilities in order to selectively target the excess of metals without interfere with metal-containing antioxidant enzymes. Moreover, antioxidant assays revealed a large contribution of GSH-LD to restore the antioxidant defences of damaged neuronal cells.
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Affiliation(s)
- Ivana Cacciatore
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy.
| | - Lisa Marinelli
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy
| | - Antonio Di Stefano
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy
| | - Valerio Di Marco
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Giustino Orlando
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy
| | - Mirko Gabriele
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy; Thermo Fisher Scientific, via Morolense 5, 03013 Ferentino (Frosinone), Italy
| | - Daniela Maria Pia Gatta
- Department of Medicine and Aging Science, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy
| | - Alessio Ferrone
- Department of Medicine and Aging Science, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy
| | - Sara Franceschelli
- Department of Medicine and Aging Science, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy
| | - Lorenza Speranza
- Department of Medicine and Aging Science, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy
| | - Antonia Patruno
- Department of Medicine and Aging Science, "G. d'Annunzio" University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Scalo (Chieti), Italy
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7
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Rizzi N, Brunialti E, Cerri S, Cermisoni G, Levandis G, Cesari N, Maggi A, Blandini F, Ciana P. In vivo imaging of early signs of dopaminergic neuronal death in an animal model of Parkinson's disease. Neurobiol Dis 2018; 114:74-84. [PMID: 29486298 DOI: 10.1016/j.nbd.2018.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 02/02/2018] [Accepted: 02/21/2018] [Indexed: 12/23/2022] Open
Abstract
The Parkinson's disease (PD) evolves over an extended period of time with the onset occurring long before clinical signs begin to manifest. Characterization of the molecular events underlying the PD onset is instrumental for the development of diagnostic markers and preventive treatments, progress in this field is hindered by technical limitations. We applied an imaging approach to demonstrate the activation of Nrf2 transcription factor as a hallmark of neurodegeneration in neurotoxin-driven models of PD. In dopaminergic SK-N-BE neuroblastoma cells, Nrf2 activation was detected in cells committed to die as proven by time lapse microscopy; in the substantia nigra pars compacta area of the mouse brain, the Nrf2 activation preceded dopaminergic neurodegeneration as demonstrated by in vivo and ex vivo optical imaging, a finding confirmed by co-localization experiments carried out by immunohistochemistry. Collectively, our results identify the Nrf2 signaling as an early marker of neurodegeneration, anticipating dopaminergic neurodegeneration and motor deficits.
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Affiliation(s)
- Nicoletta Rizzi
- Center of Excellence for Neurodegenerative Diseases, Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti 9, 20133 Milan, Italy
| | - Electra Brunialti
- Center of Excellence for Neurodegenerative Diseases, Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti 9, 20133 Milan, Italy
| | - Silvia Cerri
- Laboratory of Functional Neurochemistry, IRCCS Mondino Foundation, via Mondino 2, 27100 Pavia, Pavia, Italy
| | - Greta Cermisoni
- Center of Excellence for Neurodegenerative Diseases, Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti 9, 20133 Milan, Italy
| | - Giovanna Levandis
- Laboratory of Functional Neurochemistry, IRCCS Mondino Foundation, via Mondino 2, 27100 Pavia, Pavia, Italy
| | - Nicoletta Cesari
- Centro Clinico-Veterinario e Zootecnico-Sperimentale d'Ateneo, University of Milan, Via dell'Università 6, 26900 Lodi, Italy
| | - Adriana Maggi
- Center of Excellence for Neurodegenerative Diseases, Department of Pharmacological and Biomolecular Sciences, University of Milan, Via Balzaretti 9, 20133 Milan, Italy
| | - Fabio Blandini
- Laboratory of Functional Neurochemistry, IRCCS Mondino Foundation, via Mondino 2, 27100 Pavia, Pavia, Italy
| | - Paolo Ciana
- Center of Excellence for Neurodegenerative Diseases, Department of Oncology and Hemato-Oncology, University of Milan, Via Balzaretti 9, 20133 Milan, Italy.
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8
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Kim J, Shin SH, Ko YE, Miki T, Bae HM, Kang JK, Kim JW. HX-1171, a Novel Nrf2 Activator, Induces NQO1 and HMOX1 Expression. J Cell Biochem 2017; 118:3372-3380. [PMID: 28300285 DOI: 10.1002/jcb.25993] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 03/14/2017] [Indexed: 01/18/2023]
Abstract
HX-1171 (1-O-hexyl-2,3,5-trimethylhydroquinone) is a novel synthesized vitamin E derivative, which reportedly has positive effects on various diseases and conditions, such as liver fibrosis, hepatic cirrhosis, and cancer. In this study, we analyzed the transcriptional activity induced by HX-1171. Results from reverse transcription polymerase chain reaction and promoter assays reveal that HX-1171 increased the expression of NQO1 and HMOX1, encoding antioxidant-related enzymes, in A549 human lung epithelial cells. The activity of nuclear factor-E2-related factor (Nrf2), a key transcriptional factor for antioxidative enzymes, was examined in HX-1171-treated cells. Confocal microscopy and Western blotting showed that HX-1171 effectively induced the nuclear translocation and transcriptional activity of Nrf2. We conclude that HX-1171, a novel Nrf2 activator, may be a promising therapeutic agent for oxidative stress-induced diseases. J. Cell. Biochem. 118: 3372-3380, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Jimin Kim
- Division of Systems Biology and Bioengineering, Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea.,Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
| | - Su-Hyun Shin
- Division of Systems Biology and Bioengineering, Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Young-Eun Ko
- Division of Systems Biology and Bioengineering, Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | | | - Heung-Mo Bae
- Biotoxtech Co., Ltd, Cheongju, Republic of Korea
| | - Jong-Koo Kang
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Jae Wha Kim
- Division of Systems Biology and Bioengineering, Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea.,Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
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9
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Evaluation of the Antioxidant Activity of the Marine Pyrroloiminoquinone Makaluvamines. Mar Drugs 2016; 14:md14110197. [PMID: 27801775 PMCID: PMC5128740 DOI: 10.3390/md14110197] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 10/19/2016] [Accepted: 10/20/2016] [Indexed: 01/09/2023] Open
Abstract
Makaluvamines are pyrroloiminoquinones isolated from Zyzzya sponges. Until now, they have been described as topoisomerase II inhibitors with cytotoxic effects in diverse tumor cell lines. In the present work, seven makaluvamines were tested in several antioxidant assays in primary cortical neurons and neuroblastoma cells. Among the alkaloids studied, makaluvamine J was the most active in all the assays. This compound was able to reduce the mitochondrial damage elicited by the well-known stressor H2O2. The antioxidant properties of makaluvamine J are related to an improvement of the endogenous antioxidant defenses of glutathione and catalase. SHSY5Y assays proved that this compound acts as a Nrf2 activator leading to an improvement of antioxidant defenses. A low concentration of 10 nM is able to reduce the reactive oxygen species release and maintain a correct mitochondrial function. Based on these results, non-substituted nitrogen in the pyrrole plus the presence of a p-hydroxystyryl without a double bond seems to be the most active structure with a complete antioxidant effect in neuronal cells.
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