201
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Hayden MR. An Immediate and Long-Term Complication of COVID-19 May Be Type 2 Diabetes Mellitus: The Central Role of β-Cell Dysfunction, Apoptosis and Exploration of Possible Mechanisms. Cells 2020; 9:E2475. [PMID: 33202960 PMCID: PMC7697826 DOI: 10.3390/cells9112475] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/03/2020] [Accepted: 11/10/2020] [Indexed: 12/15/2022] Open
Abstract
The novel coronavirus disease 2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) was declared a pandemic by the WHO on 19 March 2020. This pandemic is associated with markedly elevated blood glucose levels and a remarkable degree of insulin resistance, which suggests pancreatic islet β-cell dysfunction or apoptosis and insulin's inability to dispose of glucose into cellular tissues. Diabetes is known to be one of the top pre-existing co-morbidities associated with the severity of COVID-19 along with hypertension, cardiocerebrovascular disease, advanced age, male gender, and recently obesity. This review focuses on how COVID-19 may be responsible for the accelerated development of type 2 diabetes mellitus (T2DM) as one of its acute and suspected long-term complications. These observations implicate an active role of metabolic syndrome, systemic and tissue islet renin-angiotensin-aldosterone system, redox stress, inflammation, islet fibrosis, amyloid deposition along with β-cell dysfunction and apoptosis in those who develop T2DM. Utilizing light and electron microscopy in preclinical rodent models and human islets may help to better understand how COVID-19 accelerates islet and β-cell injury and remodeling to result in the long-term complications of T2DM.
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Affiliation(s)
- Melvin R Hayden
- Departments of Internal Medicine, Endocrinology Diabetes and Metabolism, Diabetes and Cardiovascular Disease Center, University of Missouri-Columbia School of Medicine, Columbia, MO 65212, USA
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202
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Cantarero A, Andrade P, Carneiro M, Moreno-Borrallo A, Alonso-Alvarez C. Testing the carotenoid-based sexual signalling mechanism by altering CYP2J19 gene expression and colour in a bird species. Proc Biol Sci 2020; 287:20201067. [PMID: 33171089 DOI: 10.1098/rspb.2020.1067] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Ornaments can evolve to reveal individual quality when their production/maintenance costs make them reliable as 'signals' or if their expression level is intrinsically linked to condition by some unfalsifiable mechanism (indices). The latter has been mostly associated with traits constrained by body size. In red ketocarotenoid-based colorations, that link could, instead, be established with cell respiration at the inner mitochondrial membrane (IMM). The production mechanism could be independent of resource (yellow carotenoids) availability, thus discarding costs linked to allocation trade-offs. A gene coding for a ketolase enzyme (CYP2J19) responsible for converting dietary yellow carotenoids to red ketocarotenoids has recently been described. We treated male zebra finches with an antioxidant designed to penetrate the IMM (mitoTEMPO) and a thyroid hormone (triiodothyronine) with known hypermetabolic effects. Among hormone controls, MitoTEMPO downregulated CYP2J19 in the bill (a red ketocarotenoid-based ornament), supporting the mitochondrial involvement in ketolase function. Both treatments interacted when increasing hormone dosage, indicating that mitochondria and thyroid metabolisms could simultaneously regulate coloration. Moreover, CYP2J19 expression was positively correlated to redness but also to yellow carotenoid levels in the blood. However, treatment effects were not annulated when controlling for blood carotenoid variability, which suggests that costs linked to resource availability could be minor.
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Affiliation(s)
- Alejandro Cantarero
- Section of Ecology, Department of Biology, University of Turku, Turku 20014, Finland.,Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales - CSIC, C/José Gutiérrez Abascal 2, 28006 Madrid, Spain
| | - Pedro Andrade
- CIBIO/InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Campus Agrário de Vairão, 4485-661 Vairão, Portugal
| | - Miguel Carneiro
- CIBIO/InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Campus Agrário de Vairão, 4485-661 Vairão, Portugal
| | - Adrián Moreno-Borrallo
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales - CSIC, C/José Gutiérrez Abascal 2, 28006 Madrid, Spain
| | - Carlos Alonso-Alvarez
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales - CSIC, C/José Gutiérrez Abascal 2, 28006 Madrid, Spain
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203
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Molecular analysis and bioinformatic characterization of cooper, zinc-superoxide dismutase (Cu/Zn-sod) gene of Caiman latirostris. Mol Biol Rep 2020; 47:8849-8857. [DOI: 10.1007/s11033-020-05937-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 10/20/2020] [Indexed: 01/06/2023]
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204
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Zhao C, Chen J, Zhong R, Chen DS, Shi J, Song J. Materialien mit Selektivität für oxidative Molekülspezies für die Diagnostik und Therapie. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915833] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Caiyan Zhao
- MOE Key Laboratory for Analytical Science of Food Safety and Biology Institution College of Chemistry Fuzhou University Fuzhou 350108 China
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
| | - Jingxiao Chen
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
- Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of Education School of Pharmaceutical Sciences Jiangnan University Wuxi 214122 PR China
| | - Ruibo Zhong
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
| | - Dean Shuailin Chen
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
| | - Jinjun Shi
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
| | - Jibin Song
- MOE Key Laboratory for Analytical Science of Food Safety and Biology Institution College of Chemistry Fuzhou University Fuzhou 350108 China
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205
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Zhao C, Chen J, Zhong R, Chen DS, Shi J, Song J. Oxidative‐Species‐Selective Materials for Diagnostic and Therapeutic Applications. Angew Chem Int Ed Engl 2020; 60:9804-9827. [DOI: 10.1002/anie.201915833] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/15/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Caiyan Zhao
- MOE Key Laboratory for Analytical Science of Food Safety and Biology Institution College of Chemistry Fuzhou University Fuzhou 350108 China
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
| | - Jingxiao Chen
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
- Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of Education School of Pharmaceutical Sciences Jiangnan University Wuxi 214122 PR China
| | - Ruibo Zhong
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
| | - Dean Shuailin Chen
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
| | - Jinjun Shi
- Center for Nanomedicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA
| | - Jibin Song
- MOE Key Laboratory for Analytical Science of Food Safety and Biology Institution College of Chemistry Fuzhou University Fuzhou 350108 China
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206
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Zhang L, Wang H, Liu Y, Wang L, Pan W, Yuan B. Morroniside protects HT-22 cells against oxygen-glucose deprivation/reperfusion through activating the Nrf2/HO-1 signaling pathway. J Recept Signal Transduct Res 2020; 42:9-15. [PMID: 33100110 DOI: 10.1080/10799893.2020.1837872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Neonatal hypoxic-ischemic encephalopathy (HIE) is a devastating condition that affects neurodevelopment and results in brain injury in infants. Morroniside (MOR), a natural secoiridoid glycoside, has been found to possess neuroprotective effect. However, the effects of MOR on neonatal HIE are unclear. An in vitro HIE model was established in murine hippocampal neurons HT-22 cells using oxygen-glucose deprivation/reoxygenation (OGD/R) stimulation. Our results showed that MOR improved OGD/R-caused cell viability reduction in HT-22 cells. MOR suppressed the production of reactive oxygen species (ROS) and malondialdehyde (MDA) in OGD/R-induced HT-22 cells in a dose-dependent manner. The activities of superoxide dismutase (SOD) and glutathione peroxidase (GPX) were significantly elevated by MOR. Moreover, MOR treatment caused a significant increase in bcl-2 expression, and obvious decreases in the expression levels of bax, cleaved caspase-3, and cleaved caspase-9 expression. Furthermore, MOR significantly upregulated the expression levels of nuclear Nrf2 and HO-1 in OGD/R-treated HT-22 cells. Additionally, knockdown of Nrf2 or HO-1 abrogated the effects of MOR on OGD/R-induced oxidative stress and apoptosis in HT-22 cells. In conclusion, these findings suggested that MOR protects HT-22 cells against OGD/R via regulating the Nrf2/HO-1 signaling pathway.
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Affiliation(s)
- Lan Zhang
- Department of Neonatology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Huiping Wang
- Department of Neonatology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yan Liu
- Department of Neonatology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Li Wang
- Department of Neonatology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Weikang Pan
- Pediatric Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Bo Yuan
- Department of General Surgery, Xi'an Central Hospital, Xi'an, China
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207
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Tanaka M, Vécsei L. Monitoring the Redox Status in Multiple Sclerosis. Biomedicines 2020; 8:E406. [PMID: 33053739 PMCID: PMC7599550 DOI: 10.3390/biomedicines8100406] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/07/2020] [Accepted: 10/09/2020] [Indexed: 02/07/2023] Open
Abstract
Worldwide, over 2.2 million people suffer from multiple sclerosis (MS), a multifactorial demyelinating disease of the central nervous system. MS is characterized by a wide range of motor, autonomic, and psychobehavioral symptoms, including depression, anxiety, and dementia. The blood, cerebrospinal fluid, and postmortem brain samples of MS patients provide evidence on the disturbance of reduction-oxidation (redox) homeostasis, such as the alterations of oxidative and antioxidative enzyme activities and the presence of degradation products. This review article discusses the components of redox homeostasis, including reactive chemical species, oxidative enzymes, antioxidative enzymes, and degradation products. The reactive chemical species cover frequently discussed reactive oxygen/nitrogen species, infrequently featured reactive chemicals such as sulfur, carbonyl, halogen, selenium, and nucleophilic species that potentially act as reductive, as well as pro-oxidative stressors. The antioxidative enzyme systems cover the nuclear factor erythroid-2-related factor 2 (NRF2)-Kelch-like ECH-associated protein 1 (KEAP1) signaling pathway. The NRF2 and other transcriptional factors potentially become a biomarker sensitive to the initial phase of oxidative stress. Altered components of the redox homeostasis in MS were discussed in search of a diagnostic, prognostic, predictive, and/or therapeutic biomarker. Finally, monitoring the battery of reactive chemical species, oxidative enzymes, antioxidative enzymes, and degradation products helps to evaluate the redox status of MS patients to expedite the building of personalized treatment plans for the sake of a better quality of life.
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Affiliation(s)
- Masaru Tanaka
- MTA-SZTE, Neuroscience Research Group, Semmelweis u. 6, H-6725 Szeged, Hungary;
- Department of Neurology, Interdisciplinary Excellence Centre, Faculty of Medicine, University of Szeged, Semmelweis u. 6, H-6725 Szeged, Hungary
| | - László Vécsei
- MTA-SZTE, Neuroscience Research Group, Semmelweis u. 6, H-6725 Szeged, Hungary;
- Department of Neurology, Interdisciplinary Excellence Centre, Faculty of Medicine, University of Szeged, Semmelweis u. 6, H-6725 Szeged, Hungary
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208
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The Universal Soldier: Enzymatic and Non-Enzymatic Antioxidant Functions of Serum Albumin. Antioxidants (Basel) 2020; 9:antiox9100966. [PMID: 33050223 PMCID: PMC7601824 DOI: 10.3390/antiox9100966] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 12/14/2022] Open
Abstract
As a carrier of many biologically active compounds, blood is exposed to oxidants to a greater extent than the intracellular environment. Serum albumin plays a key role in antioxidant defence under both normal and oxidative stress conditions. This review evaluates data published in the literature and from our own research on the mechanisms of the enzymatic and non-enzymatic activities of albumin that determine its participation in redox modulation of plasma and intercellular fluid. For the first time, the results of numerous clinical, biochemical, spectroscopic and computational experiments devoted to the study of allosteric modulation of the functional properties of the protein associated with its participation in antioxidant defence are analysed. It has been concluded that it is fundamentally possible to regulate the antioxidant properties of albumin with various ligands, and the binding and/or enzymatic features of the protein by changing its redox status. The perspectives for using the antioxidant properties of albumin in practice are discussed.
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209
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Lin W, Wang C, Liu G, Bi C, Wang X, Zhou Q, Jin H. SLC7A11/xCT in cancer: biological functions and therapeutic implications. Am J Cancer Res 2020; 10:3106-3126. [PMID: 33163260 PMCID: PMC7642655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 09/01/2020] [Indexed: 06/11/2023] Open
Abstract
Amino acid transporters mediate substrates across cellular membranes and their fine-tuned regulations are critical to cellular metabolism, growth, and death. As the functional component of system Xc-, which imports extracellular cystine with intracellular glutamate release at a ratio of 1:1, SLC7A11 has diverse functional roles in regulating many pathophysiological processes such as cellular redox homeostasis, ferroptosis, and drug resistance in cancer. Notably, accumulated evidence demonstrated that SLC7A11 is overexpressed in many types of cancers and is associated with patients' poor prognosis. As a result, SLC7A11 becomes a new potential target for cancer therapy. In this review, we first briefly introduce the structure and function of SLC7A11, then discuss its pathological role in cancer. We next summarize current available data of how SLC7A11 is subjected to fine regulations at multiple levels. We further describe the potential inhibitors of the SLC7A11 and their roles in human cancer cells. Finally, we propose novel insights for future perspectives on the modulation of SLC7A11, as well as possible targeted strategies for SLC7A11-based anti-cancer therapies.
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Affiliation(s)
- Wenyu Lin
- Laboratory of Cancer Biology, Key Lab of Biotherapy in Zhejiang, Sir Run Run Shaw Hospital, Zhejiang University School of MedicineHangzhou 310016, Zhejiang, China
| | - Chaoqun Wang
- Department of Pathology, Affiliated Dongyang Hospital of Wenzhou Medical UniversityDongyang 322100, Zhejiang, China
| | - Guangping Liu
- College of Life Sciences, Yan’an UniversityYan’an 716000, Shaanxi, China
| | - Chao Bi
- Institute of Translational Medicine, Zhejiang University School of MedicineHangzhou 310029, Zhejiang, China
| | - Xian Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of MedicineHangzhou 310016, Zhejiang, China
| | - Qiyin Zhou
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of MedicineHangzhou 310016, Zhejiang, China
| | - Hongchuan Jin
- Laboratory of Cancer Biology, Key Lab of Biotherapy in Zhejiang, Sir Run Run Shaw Hospital, Zhejiang University School of MedicineHangzhou 310016, Zhejiang, China
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210
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Naaz S, Mishra S, Pal PK, Chattopadhyay A, Das AR, Bandyopadhyay D. Activation of SIRT1/PGC 1α/SIRT3 pathway by melatonin provides protection against mitochondrial dysfunction in isoproterenol induced myocardial injury. Heliyon 2020; 6:e05159. [PMID: 33088945 PMCID: PMC7567935 DOI: 10.1016/j.heliyon.2020.e05159] [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: 06/16/2020] [Revised: 08/16/2020] [Accepted: 10/01/2020] [Indexed: 12/22/2022] Open
Abstract
AIMS Preventing mitochondrial dysfunction and enhancing mitochondrial health and biogenesis is a crucial therapeutic approach to ameliorate injury following acute myocardial infarction. Although the antioxidant role of melatonin against ischemia/reperfusion injury has been reported, the exact mechanism of protection, in vivo, remains poorly understood. This study aims to identify and elaborate upon mechanism of melatonin protection of rat cardiac mitochondria against acute myocardial infarction. MAIN METHODS Rats were pre-treated with melatonin (10 mg/kg body weight (b.w.); intraperitoneally, i.p.) before isoproterenol bitartrate (ISO) administration (25 mg/kg body weight (b.w.) subcutaneously,s.c.) and their effect on rat heart mitochondrial structure and function was studied. Biochemical changes in activity of biomarkers of oxidative stress, antioxidant enzymes as well as Krebs' cycle enzymes were analyzed. Gene expression studies and Isothermal titration calorimetric studies with pure catalase and ISO were also carried out. KEY FINDINGS Melatonin was shown to reduce ISO induced oxidative stress, by stimulating superoxide dismutase activity and removing the inhibition of Krebs' cycle enzymes. Herein we report for the first time in rat model that melatonin activates the SIRT1-PGC-1α-SIRT3 signaling pathways after ISO administration, which ultimately induces mitochondrial biogenesis. Melatonin exhibited significant protection of mitochondrial architecture and topology along with increased calcium ion permeability and reactive oxygen species (ROS) generation induced by ISO. Isothermal calorimetric studies revealed that melatonin binds to ISO molecules and sequesters them from the reaction thereby limiting their interaction with catalase along with occupying the binding sites of catalase themselves. SIGNIFICANCE Activation of SIRT1-PGC-1α-SIRT3 pathway by melatonin along with its biophysical properties prevents ISO induced mitochondrial injury in rat heart.
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Affiliation(s)
- Shamreen Naaz
- Department of Physiology, Oxidative Stress and Free Radical Biology Laboratory, University of Calcutta, University College of Science and Technology, 92, APC Road, Kolkata 700 009, West Bengal, India
- Department of Physiology, Vidyasagar College for Women, Kolkata 700 006, India
| | - Sanatan Mishra
- Department of Physiology, Oxidative Stress and Free Radical Biology Laboratory, University of Calcutta, University College of Science and Technology, 92, APC Road, Kolkata 700 009, West Bengal, India
- Department of Physiology, Vidyasagar College, Kolkata 700 006, India
| | - Palash K. Pal
- Department of Physiology, Oxidative Stress and Free Radical Biology Laboratory, University of Calcutta, University College of Science and Technology, 92, APC Road, Kolkata 700 009, West Bengal, India
| | | | - Asish R. Das
- Department of Chemistry, University of Calcutta, University College of Science and Technology, 92, APC Road, Kolkata 700 009, West Bengal, India
| | - Debasish Bandyopadhyay
- Department of Physiology, Oxidative Stress and Free Radical Biology Laboratory, University of Calcutta, University College of Science and Technology, 92, APC Road, Kolkata 700 009, West Bengal, India
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211
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The Role of BRG1 in Antioxidant and Redox Signaling. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6095673. [PMID: 33014273 PMCID: PMC7512085 DOI: 10.1155/2020/6095673] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 08/13/2020] [Accepted: 09/01/2020] [Indexed: 12/15/2022]
Abstract
Redox homeostasis is regulated by critical molecules that modulate antioxidant and redox signaling (ARS) within the cell. Imbalances among these molecules can lead to oxidative stress and damage to cell functions, causing a variety of diseases. Brahma-related gene 1 (BRG1), also known as SMARCA4, is the central ATPase catalytic subunit of the switch/sucrose nonfermentable (SWI/SNF) chromatin remodeling complex, which plays a core role in DNA replication, repair, recombination, and transcriptional regulation. Numerous recent studies show that BRG1 is involved in the regulation of various cellular processes associated with ARS. BRG1, as a major factor in chromatin remodeling, is essential for the repair of oxidative stress-induced DNA damage and the activation of antioxidant genes under oxidative stress. Consequently, a comprehensive understanding of the roles of BRG1 in redox homeostasis is crucial to understand the normal functioning as well as pathological mechanisms. In this review, we summarized and discussed the role of BRG1 in the regulation of ARS.
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212
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Sanadi RM, Deshmukh RS. The effect of Vitamin C on melanin pigmentation - A systematic review. J Oral Maxillofac Pathol 2020; 24:374-382. [PMID: 33456250 PMCID: PMC7802860 DOI: 10.4103/jomfp.jomfp_207_20] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/30/2020] [Accepted: 07/04/2020] [Indexed: 11/04/2022] Open
Abstract
Vitamin C, also known as ascorbic acid, is used as a treatment modality in depigmentation of hyperpigmented spots on the skin and gingiva. This systematic review discusses the studies conducted to assess the effect of Vitamin C on melanin pigmentation. The primary objective was to evaluate the effect of Vitamin C on melanin pigmentation. The secondary objective was to analyze the effect of Vitamin C administration on melanin pigmentation. An electronic database search was conducted from the following databases: PubMed, EBSCOhost, ScienceOpen, EMBASE and Google Scholar. Randomized controlled trials, experimental studies, case-control studies and cohort studies published in peer-reviewed journals in English language were included. Case reports, case series, animal model studies, in vitro studies, studies where Vitamin C was used along with other agents and unpublished research were excluded. Out of 22,580 studies, only 7 studies satisfied the selection criteria. Data extraction sheet was prepared, and the studies were analyzed. Out of the 7 studies analyzed, 1 was a randomized controlled trial and 6 were experimental studies. Vitamin C has been used widely as a depigmenting agent in dermatology. However, there are limited studies conducted on the use of Vitamin C for gingival depigmentation.
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Affiliation(s)
- Rizwan M Sanadi
- Department of Periodontics, Dr GD Pol Foundation's YMT Dental College, Kharghar, Sector - 4, Navi Mumbai and PhD Student, Pune, Maharashtra, India
| | - Revati S Deshmukh
- Department of Oral Pathology and Microbiology, Bharati Vidyapeeth Deemed to be University, Dental College and Hospital, Satara Road, Katraj, Dhankawadi, Pune, Maharashtra, India
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213
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Jiang J, Wang F, Wang L, Xiao J, Guo D. Manganese Chloride Exposure Causes Disorder of Energy Metabolism and Induces Oxidative Stress and Autophagy in Chicken Liver. Biol Trace Elem Res 2020; 197:254-261. [PMID: 31916180 DOI: 10.1007/s12011-019-01960-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 10/28/2019] [Indexed: 12/13/2022]
Abstract
Manganese (Mn) pollution is an important environmental problem because of the potential toxicity to human and animal health. However, the effects of Mn on energy metabolism and autophagy are not clear. Consequently, we examined the effects of excessive and chronic exposure to Mn on liver function, oxidative stress, respiratory chain complex activity, and autophagy in chicken liver. Our results indicated that the accumulation of Mn in the liver and levels of AST and ALT in the serum of the Mn-exposed group were significantly higher (P < 0.05) than those in the control group at 90 days; the activities of GSH-Px, SOD, CAT, Na+-K+-ATPase, Mg2+-ATPase, Ca2+-ATPase, and respiratory chain complexes (I, II, III) in the Mn-exposed group were significantly decreased (P < 0.05) compared to the control group. However, the MDA content, NO content, iNOS activity, mRNA and protein levels of iNOS, and autophagy-related genes in the Mn-exposed group were significantly increased (P < 0.05) compared to the control group. In contrast, the mRNA level and protein expression of mTOR were significantly decreased (P < 0.05) compared to the control group. Furthermore, the characteristic autophagic vacuolar organelles were observed in the Mn-exposed group. These results suggested that excess Mn exposure can cause a disorder of energy metabolism by mitochondrial injury and induce oxidative stress and autophagy, which eventually lead to liver damage.
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Affiliation(s)
- Jiancheng Jiang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing, 163319, China
| | - Fengfeng Wang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing, 163319, China
| | - Lina Wang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing, 163319, China
| | - Jiawei Xiao
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing, 163319, China
| | - Donghua Guo
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No. 5 Xinfeng Road, Sartu District, Daqing, 163319, China.
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214
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Pan M, Liu K, Yang J, Liu S, Wang S, Wang S. Advances on Food-Derived Peptidic Antioxidants-A Review. Antioxidants (Basel) 2020; 9:E799. [PMID: 32867173 PMCID: PMC7554705 DOI: 10.3390/antiox9090799] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/22/2020] [Accepted: 08/24/2020] [Indexed: 02/07/2023] Open
Abstract
The oxidation process is considered to be the main reason behind human aging, human degenerative diseases and food quality degradation. Food-derived peptidic antioxidants (PAs) have wide sources and great activity, and have broad application prospects in removing excess reactive oxygen species in the body, anti-aging and preventing and treating diseases related to oxidative stress. On the other hand, PAs are expected to inhibit the lipid peroxidation of foods and increase the stability of the food system in the food industry. However, the production pathways and action mechanism of food-derived PAs are diverse, which makes it is difficult to evaluate the performance of PAs which is why the commercial application of PAs is still in its infancy. This article focuses on reviewing the preparation, purification, and characterization methods of food-derived PAs, and expounds the latest progress in performance evaluation and potential applications, in order to provide an effective reference for subsequent related research of PAs.
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Affiliation(s)
- Mingfei Pan
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; (M.P.); (K.L.); (J.Y.); (S.L.); (S.W.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Kaixin Liu
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; (M.P.); (K.L.); (J.Y.); (S.L.); (S.W.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Jingying Yang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; (M.P.); (K.L.); (J.Y.); (S.L.); (S.W.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Shengmiao Liu
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; (M.P.); (K.L.); (J.Y.); (S.L.); (S.W.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Shan Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; (M.P.); (K.L.); (J.Y.); (S.L.); (S.W.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Shuo Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China; (M.P.); (K.L.); (J.Y.); (S.L.); (S.W.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
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215
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Pinto DO, DeMarino C, Vo TT, Cowen M, Kim Y, Pleet ML, Barclay RA, Noren Hooten N, Evans MK, Heredia A, Batrakova EV, Iordanskiy S, Kashanchi F. Low-Level Ionizing Radiation Induces Selective Killing of HIV-1-Infected Cells with Reversal of Cytokine Induction Using mTOR Inhibitors. Viruses 2020; 12:E885. [PMID: 32823598 PMCID: PMC7472203 DOI: 10.3390/v12080885] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/07/2020] [Accepted: 08/10/2020] [Indexed: 12/12/2022] Open
Abstract
HIV-1 infects 39.5 million people worldwide, and cART is effective in preventing viral spread by reducing HIV-1 plasma viral loads to undetectable levels. However, viral reservoirs persist by mechanisms, including the inhibition of autophagy by HIV-1 proteins (i.e., Nef and Tat). HIV-1 reservoirs can be targeted by the "shock and kill" strategy, which utilizes latency-reversing agents (LRAs) to activate latent proviruses and immunotarget the virus-producing cells. Yet, limitations include reduced LRA permeability across anatomical barriers and immune hyper-activation. Ionizing radiation (IR) induces effective viral activation across anatomical barriers. Like other LRAs, IR may cause inflammation and modulate the secretion of extracellular vesicles (EVs). We and others have shown that cells may secrete cytokines and viral proteins in EVs and, therefore, LRAs may contribute to inflammatory EVs. In the present study, we mitigated the effects of IR-induced inflammatory EVs (i.e., TNF-α), through the use of mTOR inhibitors (mTORi; Rapamycin and INK128). Further, mTORi were found to enhance the selective killing of HIV-1-infected myeloid and T-cell reservoirs at the exclusion of uninfected cells, potentially via inhibition of viral transcription/translation and induction of autophagy. Collectively, the proposed regimen using cART, IR, and mTORi presents a novel approach allowing for the targeting of viral reservoirs, prevention of immune hyper-activation, and selectively killing latently infected HIV-1 cells.
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Affiliation(s)
- Daniel O. Pinto
- Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA; (D.O.P.); (C.D.); (T.T.V.); (M.C.); (Y.K.); (M.L.P.); (R.A.B.)
| | - Catherine DeMarino
- Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA; (D.O.P.); (C.D.); (T.T.V.); (M.C.); (Y.K.); (M.L.P.); (R.A.B.)
| | - Thy T. Vo
- Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA; (D.O.P.); (C.D.); (T.T.V.); (M.C.); (Y.K.); (M.L.P.); (R.A.B.)
| | - Maria Cowen
- Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA; (D.O.P.); (C.D.); (T.T.V.); (M.C.); (Y.K.); (M.L.P.); (R.A.B.)
| | - Yuriy Kim
- Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA; (D.O.P.); (C.D.); (T.T.V.); (M.C.); (Y.K.); (M.L.P.); (R.A.B.)
| | - Michelle L. Pleet
- Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA; (D.O.P.); (C.D.); (T.T.V.); (M.C.); (Y.K.); (M.L.P.); (R.A.B.)
| | - Robert A. Barclay
- Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA; (D.O.P.); (C.D.); (T.T.V.); (M.C.); (Y.K.); (M.L.P.); (R.A.B.)
| | - Nicole Noren Hooten
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA; (N.N.H.); (M.K.E.)
| | - Michele K. Evans
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA; (N.N.H.); (M.K.E.)
| | - Alonso Heredia
- Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD 21201, USA;
| | - Elena V. Batrakova
- Department of Medicine, University of North Carolina HIV Cure Center; University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC 27599, USA;
| | - Sergey Iordanskiy
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA;
| | - Fatah Kashanchi
- Laboratory of Molecular Virology, School of Systems Biology, George Mason University, Manassas, VA 20110, USA; (D.O.P.); (C.D.); (T.T.V.); (M.C.); (Y.K.); (M.L.P.); (R.A.B.)
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216
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Weber M, Han HH, Li BH, Odyniec ML, Jarman CEF, Zang Y, Bull SD, Mackenzie AB, Sedgwick AC, Li J, He XP, James TD. Pinkment: a synthetic platform for the development of fluorescent probes for diagnostic and theranostic applications. Chem Sci 2020; 11:8567-8571. [PMID: 34123116 PMCID: PMC8163375 DOI: 10.1039/d0sc02438d] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Reaction-based fluorescent-probes have proven successful for the visualisation of biological species in various cellular processes. Unfortunately, in order to tailor the design of a fluorescent probe to a specific application (i.e. organelle targeting, material and theranostic applications) often requires extensive synthetic efforts and the synthetic screening of a range of fluorophores to match the required synthetic needs. In this work, we have identified Pinkment-OH as a unique “plug-and-play” synthetic platform that can be used to develop a range of ONOO− responsive fluorescent probes for a variety of applications. These include theranostic-based applications and potential material-based/bioconjugation applications. The as prepared probes displayed an excellent sensitivity and selectivity for ONOO− over other ROS. In vitro studies using HeLa cells and RAW 264.7 macrophages demonstrated their ability to detect exogenously and endogenously produced ONOO−. Evaluation in an LPS-induced inflammation mouse model illustrated the ability to monitor ONOO− production in acute inflammation. Lastly, theranostic-based probes enabled the simultaneous evaluation of indomethacin-based therapeutic effects combined with the visualisation of an inflammation biomarker in RAW 264.7 cells. Pinkment, a resorufin based ONOO− selective and sensitive ‘plug and play’ fluorescence-based platform for in vitro and in vivo use, enables facile functionalisation for various imaging and theranostic applications.![]()
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Affiliation(s)
- Maria Weber
- Department of Chemistry, University of Bath Bath BA2 7AY UK .,Centre for Doctoral Training, Centre for Sustainable & Circular Technologies, University of Bath Bath BA2 7AY UK
| | - Hai-Hao Han
- National Centre for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 189 Guo Shoujing Rd. Shanghai 201203 PR China .,Key Laboratory for Advanced Materials & Feringa Nobel Prize Scientist Joint Research Centre, School of Chemistry and Molecular Engineering, Frontiers Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology 130 Meilong Rd. Shanghai 200237 PR China
| | - Bo-Han Li
- National Centre for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 189 Guo Shoujing Rd. Shanghai 201203 PR China .,University of Chinese Academy of Sciences No. 19A Yuquan Road Beijing 100049 PR China
| | | | | | - Yi Zang
- National Centre for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 189 Guo Shoujing Rd. Shanghai 201203 PR China
| | - Steven D Bull
- Department of Chemistry, University of Bath Bath BA2 7AY UK
| | - Amanda B Mackenzie
- Department of Pharmacy and Pharmacology, University of Bath Bath BA2 7AY UK.,Centre for Therapeutic Innovation, University of Bath Bath BA2 7AY UK
| | - Adam C Sedgwick
- Department of Chemistry, University of Texas at Austin 105 East 24th Street A5300 Austin Texas 78712-1224 USA
| | - Jia Li
- National Centre for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 189 Guo Shoujing Rd. Shanghai 201203 PR China .,University of Chinese Academy of Sciences No. 19A Yuquan Road Beijing 100049 PR China
| | - Xiao-Peng He
- Key Laboratory for Advanced Materials & Feringa Nobel Prize Scientist Joint Research Centre, School of Chemistry and Molecular Engineering, Frontiers Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology 130 Meilong Rd. Shanghai 200237 PR China
| | - Tony D James
- Department of Chemistry, University of Bath Bath BA2 7AY UK
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217
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Zhang X, Liu C, Tian W, Zhang H, Li P, Wang J, He W. Theoretical and experimental investigation of the antioxidative activity of monascin. Food Funct 2020; 11:5915-5923. [PMID: 32584351 DOI: 10.1039/c9fo02410g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monascin, a specific type of monascus pigments, exhibits many bioactivities. In this study, the antioxidative activity of monascin was investigated by theoretical and experimental methods. First, the antioxidant potential of six monascus pigments was predicted by density functional theory (DFT) and time-dependent density functional theory (TDDFT) at the B3LYP/6-31+G (d, p) level, and monascus yellow pigments were predicted to have strong antioxidant capacity, as they can transfer hydrogen to free radicals and accept electrons from radicals. Then, the free radical-scavenging capacity of monascin for 2,2-diphenyl-1-picrylhydrazyl (DPPH), superoxide, and hydroxyl radicals was experimentally validated by electron spin resonance (ESR) measurement. Monascin exhibited a quenching effect on DPPH, superoxide, and hydroxyl radicals in a dose-dependent manner. Specifically, the scavenging activity of monascin for DPPH, superoxide, and hydroxyl radicals was 97.5%, 59.5%, and 68.6%, respectively, when 0.1 mg mL-1 monascin was present. Our study provides theoretical evidence for the strong antioxidative activity of monascin and offers a simple and reliable strategy to determine the antioxidative activity.
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Affiliation(s)
- Xiaowei Zhang
- Food and Bioengineering College, Xuchang University, Henan 461000, P. R. China.
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218
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Caruso G, Fresta CG, Grasso M, Santangelo R, Lazzarino G, Lunte SM, Caraci F. Inflammation as the Common Biological Link Between Depression and Cardiovascular Diseases: Can Carnosine Exert a Protective Role? Curr Med Chem 2020; 27:1782-1800. [PMID: 31296155 DOI: 10.2174/0929867326666190712091515] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 01/15/2019] [Accepted: 02/05/2019] [Indexed: 01/03/2023]
Abstract
Several epidemiological studies have clearly shown the high co-morbidity between depression and Cardiovascular Diseases (CVD). Different studies have been conducted to identify the common pathophysiological events of these diseases such as the overactivation of the hypothalamic- pituitary-adrenal axis and, most importantly, the dysregulation of immune system which causes a chronic pro-inflammatory status. The biological link between depression, inflammation, and CVD can be related to high levels of pro-inflammatory cytokines, such as IL-1β, TNF-α, and IL-6, released by macrophages which play a central role in the pathophysiology of both depression and CVD. Pro-inflammatory cytokines interfere with many of the pathophysiological mechanisms relevant to depression by upregulating the rate-limiting enzymes in the metabolic pathway of tryptophan and altering serotonin metabolism. These cytokines also increase the risk to develop CVD, because activation of macrophages under this pro-inflammatory status is closely associated with endothelial dysfunction and oxidative stress, a preamble to atherosclerosis and atherothrombosis. Carnosine (β-alanyl-L-histidine) is an endogenous dipeptide which exerts a strong antiinflammatory activity on macrophages by suppressing reactive species and pro-inflammatory cytokines production and altering pro-inflammatory/anti-inflammatory macrophage polarization. This dipeptide exhibits antioxidant properties scavenging reactive species and preventing oxidative stress-induced pathologies such as CVD. In the present review we will discuss the role of oxidative stress and chronic inflammation as common pathophysiological events both in depression and CVD and the preclinical and clinical evidence on the protective effect of carnosine in both diseases as well as the therapeutic potential of this dipeptide in depressed patients with a high co-morbidity of cardiovascular diseases.
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Affiliation(s)
- Giuseppe Caruso
- Oasi Research Institute - IRCCS, Via Conte Ruggero, 73, Troina 94018, Italy
| | - Claudia G Fresta
- Department of Biomedical and Biotechnological Sciences, Section of Pharmacology, University of Catania, Catania 95125, Italy
| | - Margherita Grasso
- Oasi Research Institute - IRCCS, Via Conte Ruggero, 73, Troina 94018, Italy.,Department of Drug Sciences, University of Catania, Catania 95125, Italy
| | - Rosa Santangelo
- Department of Drug Sciences, University of Catania, Catania 95125, Italy
| | - Giuseppe Lazzarino
- Department of Biomedical and Biotechnological Sciences, Division of Medical Biochemistry, University of Catania, Catania 95125, Italy
| | - Susan M Lunte
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence 66045, Kansas, United States.,Department of Pharmaceutical Chemistry, University of Kansas, Lawrence 66045, Kansas, United States.,Department of Chemistry, University of Kansas, Lawrence 66045, Kansas, United States
| | - Filippo Caraci
- Oasi Research Institute - IRCCS, Via Conte Ruggero, 73, Troina 94018, Italy.,Department of Drug Sciences, University of Catania, Catania 95125, Italy
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219
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Reactive Species in Huntington Disease: Are They Really the Radicals You Want to Catch? Antioxidants (Basel) 2020; 9:antiox9070577. [PMID: 32630706 PMCID: PMC7401865 DOI: 10.3390/antiox9070577] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/22/2020] [Accepted: 06/26/2020] [Indexed: 02/06/2023] Open
Abstract
Huntington disease (HD) is a neurodegenerative condition and one of the so-called rare or minority diseases, due to its low prevalence (affecting 1–10 of every 100,000 people in western countries). The causative gene, HTT, encodes huntingtin, a protein with a yet unknown function. Mutant huntingtin causes a range of phenotypes, including oxidative stress and the activation of microglia and astrocytes, which leads to chronic inflammation of the brain. Although substantial efforts have been made to find a cure for HD, there is currently no medical intervention able to stop or even delay progression of the disease. Among the many targets of therapeutic intervention, oxidative stress and inflammation have been extensively studied and some clinical trials have been promoted to target them. In the present work, we review the basic research on oxidative stress in HD and the strategies used to fight it. Many of the strategies to reduce the phenotypes associated with oxidative stress have produced positive results, yet no substantial functional recovery has been observed in animal models or patients with the disease. We discuss possible explanations for this and suggest potential ways to overcome it.
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220
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Qian B, Zhao X, Yang Y, Tian C. Antioxidant and anti-inflammatory peptide fraction from oyster soft tissue by enzymatic hydrolysis. Food Sci Nutr 2020; 8:3947-3956. [PMID: 32724655 PMCID: PMC7382192 DOI: 10.1002/fsn3.1710] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 05/19/2020] [Accepted: 05/22/2020] [Indexed: 12/30/2022] Open
Abstract
Recent studies have confirmed that the peptide fractions derived from marine organisms exhibit good antioxidant and anti-inflammatory activity, and oyster is an excellent nutrient resource with high-protein content. In this study, the peptide fractions from oyster soft tissue were prepared after hydrolysis by pepsin (pH 2, 37°C), trypsin (pH 8, 37°C), and Maxipro PSP (pH 4.2, 50°C) with the optimized parameters (enzyme-to-substrate (E/S) ratio, 1:100 (w/w); hydrolysis time, 4 hr), respectively. Four fractions named as PEP-1, PEP-2, TRYP-2, and MIX-2 were obtained after separation with elution consisting of 20% or 40% ethanol. The MIX-2 exhibited the highest hydrophobicity correlated well with its hydrophobic amino acid content, and TRYP-2 exhibited much better antioxidant activity than other three elution samples. Furthermore, all of the bioactive peptide fractions were noncytotoxic and could selectively repress pro-inflammatory mediators, TNF-α, IL-1β, IL-6, and i-NOS, at transcription level in RAW264.7 macrophage cells after LPS stimulation. The result suggests that the peptide fraction TRYP-2 from oyster soft tissue hydrolysates might be a potential resource for natural anti-inflammatory components.
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Affiliation(s)
- Bingjun Qian
- Institute of Biomedical TechnologyJiangsu Vocational College of MedicineYanchengChina
| | - Xin Zhao
- Department of Food Science and EngineeringShanghai Jiao Tong UniversityShanghaiChina
| | - Ye Yang
- Institute of Biomedical TechnologyJiangsu Vocational College of MedicineYanchengChina
| | - Chongchong Tian
- Institute of Biomedical TechnologyJiangsu Vocational College of MedicineYanchengChina
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221
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Al-Shehri SS, Duley JA, Bansal N. Xanthine oxidase-lactoperoxidase system and innate immunity: Biochemical actions and physiological roles. Redox Biol 2020; 34:101524. [PMID: 32334145 PMCID: PMC7183230 DOI: 10.1016/j.redox.2020.101524] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 03/22/2020] [Accepted: 03/24/2020] [Indexed: 02/01/2023] Open
Abstract
The innate immune system in mammals is the first-line defense that plays an important protective role against a wide spectrum of pathogens, especially during early life before the adaptive immune system develops. The enzymes xanthine oxidase (XO) and lactoperoxidase (LPO) are widely distributed in mammalian tissues and secretions, and have a variety of biological functions including in innate immunity, provoking much interest for both in vitro and in vivo applications. The enzymes are characterized by their generation of reactive oxygen and nitrogen species, including hydrogen peroxide, hypothiocyanite, nitric oxide, and peroxynitrite. XO is a major generator of hydrogen peroxide and superoxide that subsequently trigger a cascade of oxidative radical pathways, including those produced by LPO, which have bactericidal and bacteriostatic effects against pathogens including opportunistic bacteria. In addition to their role in host microbial defense, reactive oxygen and nitrogen species play important physiological roles as second messenger cell signaling molecules, including cellular proliferation, differentiation and gene expression. There are several indications that the reactive species generated by peroxide have positive effects on human health, particularly in neonates; however, some important in vivo aspects of this system remain obscure. The primary dependence of the system on hydrogen peroxide has led us to propose it is particularly relevant to neonate mammals during milk feeding.
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Affiliation(s)
- Saad S Al-Shehri
- College of Applied Medical Sciences, Taif University, Taif, 21944, Saudi Arabia.
| | - John A Duley
- School of Pharmacy, The University of Queensland, St Lucia, 4102, Australia
| | - Nidhi Bansal
- School of Pharmacy, The University of Queensland, St Lucia, 4102, Australia; School of Agriculture and Food Science, The University of Queensland, St Lucia, 4102, Australia
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222
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Diniz do Nascimento L, Barbosa de Moraes AA, Santana da Costa K, Pereira Galúcio JM, Taube PS, Leal Costa CM, Neves Cruz J, de Aguiar Andrade EH, Guerreiro de Faria LJ. Bioactive Natural Compounds and Antioxidant Activity of Essential Oils from Spice Plants: New Findings and Potential Applications. Biomolecules 2020; 10:biom10070988. [PMID: 32630297 PMCID: PMC7407208 DOI: 10.3390/biom10070988] [Citation(s) in RCA: 160] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/16/2020] [Accepted: 06/18/2020] [Indexed: 12/13/2022] Open
Abstract
Spice plants have a great influence on world history. For centuries, different civilizations have used them to condiment the foods of kings and nobles and applied them as embalming preservatives, perfumes, cosmetics, and medicines in different regions of the world. In general, these plants have formed the basis of traditional medicine and some of their derived substances have been utilized to treat different human diseases. Essential oils (EOs) obtained from these plants have been also used as therapeutic agents and have shown supportive uses in remedial practices. The discovery and development of bioactive compounds from these natural products, based on their traditional uses, play an important role in developing the scientific evidence of their potential pharmaceutical, cosmetic, and food applications. In the present review, using recent studies, we exhibit a general overview of the main aspects related to the importance of spice plants widely used in traditional medicine: Cinnamomum zeylanicum (true cinnamon), Mentha piperita (peppermint), Ocimum basilicum (basil), Origanum vulgare (oregano), Piper nigrum (black pepper), Rosmarinus officinalis (rosemary), and Thymus vulgaris (thyme); and we discuss new findings of the bioactive compounds obtained from their EOs, their potential applications, as well as their molecular mechanisms of action, focusing on their antioxidant activity. We also exhibit the main in vitro methods applied to determine the antioxidant activities of these natural products.
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Affiliation(s)
- Lidiane Diniz do Nascimento
- Programa de Pós-graduação em Engenharia de Recursos Naturais da Amazônia, Instituto de Tecnologia, Universidade Federal do Pará, Belém 66075110, Brazil;
- Laboratório Adolpho Ducke, Coordenação de Botânica, Museu Paraense Emílio Goeldi, Belém 66077-830, Brazil; (A.A.B.d.M.); (J.N.C.); (E.H.d.A.A.)
- Correspondence: or (L.D.d.N.); (K.S.d.C.); Tel.: +55-91-3217-6086 (L.D.d.N.); +55-93-2101-6771 (K.S.d.C.)
| | - Angelo Antônio Barbosa de Moraes
- Laboratório Adolpho Ducke, Coordenação de Botânica, Museu Paraense Emílio Goeldi, Belém 66077-830, Brazil; (A.A.B.d.M.); (J.N.C.); (E.H.d.A.A.)
| | - Kauê Santana da Costa
- Instituto de Biodiversidade, Universidade Federal do Oeste do Pará, Vera Paz Street, w/n Salé, Santarém 68040-255, Brazil; (J.M.P.G.); (P.S.T.)
- Correspondence: or (L.D.d.N.); (K.S.d.C.); Tel.: +55-91-3217-6086 (L.D.d.N.); +55-93-2101-6771 (K.S.d.C.)
| | - João Marcos Pereira Galúcio
- Instituto de Biodiversidade, Universidade Federal do Oeste do Pará, Vera Paz Street, w/n Salé, Santarém 68040-255, Brazil; (J.M.P.G.); (P.S.T.)
| | - Paulo Sérgio Taube
- Instituto de Biodiversidade, Universidade Federal do Oeste do Pará, Vera Paz Street, w/n Salé, Santarém 68040-255, Brazil; (J.M.P.G.); (P.S.T.)
| | - Cristiane Maria Leal Costa
- Programa de Pós-graduação em Engenharia Química, Instituto de Tecnologia, Universidade Federal do Pará, Belém 66075110, Brazil;
| | - Jorddy Neves Cruz
- Laboratório Adolpho Ducke, Coordenação de Botânica, Museu Paraense Emílio Goeldi, Belém 66077-830, Brazil; (A.A.B.d.M.); (J.N.C.); (E.H.d.A.A.)
| | - Eloisa Helena de Aguiar Andrade
- Laboratório Adolpho Ducke, Coordenação de Botânica, Museu Paraense Emílio Goeldi, Belém 66077-830, Brazil; (A.A.B.d.M.); (J.N.C.); (E.H.d.A.A.)
| | - Lênio José Guerreiro de Faria
- Programa de Pós-graduação em Engenharia de Recursos Naturais da Amazônia, Instituto de Tecnologia, Universidade Federal do Pará, Belém 66075110, Brazil;
- Programa de Pós-graduação em Engenharia Química, Instituto de Tecnologia, Universidade Federal do Pará, Belém 66075110, Brazil;
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223
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Saccà SC, Vernazza S, Iorio EL, Tirendi S, Bassi AM, Gandolfi S, Izzotti A. Molecular changes in glaucomatous trabecular meshwork. Correlations with retinal ganglion cell death and novel strategies for neuroprotection. PROGRESS IN BRAIN RESEARCH 2020; 256:151-188. [PMID: 32958211 DOI: 10.1016/bs.pbr.2020.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Glaucoma is a chronic neurodegenerative disease characterized by retinal ganglion cell loss. Although significant advances in ophthalmologic knowledge and practice have been made, some glaucoma mechanisms are not yet understood, therefore, up to now there is no effective treatment able to ensure healing. Indeed, either pharmacological or surgical approaches to this disease aim in lowering intraocular pressure, which is considered the only modifiable risk factor. However, it is well known that several factors and metabolites are equally (if not more) involved in glaucoma. Oxidative stress, for instance, plays a pivotal role in both glaucoma onset and progression because it is responsible for the trabecular meshwork cell damage and, consequently, for intraocular pressure increase as well as for glaucomatous damage cascade. This review at first shows accurately the molecular-derived dysfunctions in antioxidant system and in mitochondria homeostasis which due to both oxidative stress and aging, lead to a chronic inflammation state, the trabecular meshwork damage as well as the glaucoma neurodegeneration. Therefore, the main molecular events triggered by oxidative stress up to the proapoptotic signals that promote the ganglion cell death have been highlighted. The second part of this review, instead, describes some of neuroprotective agents such as polyphenols or polyunsaturated fatty acids as possible therapeutic source against the propagation of glaucomatous damage.
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Affiliation(s)
- Sergio C Saccà
- Policlinico San Martino University Hospital, Department of Neuroscience and sense organs, Ophthalmology Unit, Genoa, Italy.
| | | | | | - Sara Tirendi
- Department of Experimental Medicine (DIMES), University of Genoa, Genoa, Italy; Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Pisa, Italy
| | - Anna Maria Bassi
- Department of Experimental Medicine (DIMES), University of Genoa, Genoa, Italy; Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Pisa, Italy
| | - Stefano Gandolfi
- Ophthalmology Unit, Department of Biological, Biotechnological and Translational Sciences, University of Parma, Parma, Italy
| | - Alberto Izzotti
- Department of Experimental Medicine (DIMES), University of Genoa, Genoa, Italy; Mutagenesis Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
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Design and evaluation of bi-functional iron chelators for protection of dopaminergic neurons from toxicants. Arch Toxicol 2020; 94:3105-3123. [PMID: 32607613 PMCID: PMC7415766 DOI: 10.1007/s00204-020-02826-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 06/24/2020] [Indexed: 02/07/2023]
Abstract
While the etiology of non-familial Parkinson’s disease (PD) remains unclear, there is evidence that increased levels of tissue iron may be a contributing factor. Moreover, exposure to some environmental toxicants is considered an additional risk factor. Therefore, brain-targeted iron chelators are of interest as antidotes for poisoning with dopaminergic toxicants, and as potential treatment of PD. We, therefore, designed a series of small molecules with high affinity for ferric iron and containing structural elements to allow their transport to the brain via the neutral amino acid transporter, LAT1 (SLC7A5). Five candidate molecules were synthesized and initially characterized for protection from ferroptosis in human neurons. The promising hydroxypyridinone SK4 was characterized further. Selective iron chelation within the physiological range of pH values and uptake by LAT1 were confirmed. Concentrations of 10–20 µM blocked neurite loss and cell demise triggered by the parkinsonian neurotoxicants, methyl-phenyl-pyridinium (MPP+) and 6-hydroxydopamine (6-OHDA) in human dopaminergic neuronal cultures (LUHMES cells). Rescue was also observed when chelators were given after the toxicant. SK4 derivatives that either lacked LAT1 affinity or had reduced iron chelation potency showed altered activity in our assay panel, as expected. Thus, an iron chelator was developed that revealed neuroprotective properties, as assessed in several models. The data strongly support the role of iron in dopaminergic neurotoxicity and suggests further exploration of the proposed design strategy for improving brain iron chelation.
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Akbari A, Mobini GR, Agah S, Morvaridzadeh M, Omidi A, Potter E, Fazelian S, Ardehali SH, Daneshzad E, Dehghani S. Coenzyme Q10 supplementation and oxidative stress parameters: a systematic review and meta-analysis of clinical trials. Eur J Clin Pharmacol 2020; 76:1483-1499. [PMID: 32583356 DOI: 10.1007/s00228-020-02919-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 05/26/2020] [Indexed: 12/21/2022]
Abstract
PURPOSE Oxidative stress (OS) is associated with several chronic complications and diseases. The use of coenzyme Q10 (CoQ10) as an adjuvant treatment with routine clinical therapy against metabolic diseases has shown to be beneficial. However, the impact of CoQ10 as a preventive agent against OS has not been systematically investigated. METHODS A systematic literature search was performed using the PubMed, SCOPUS, EMBASE, and Cochrane Library databases to identify randomized clinical trials evaluating the efficacy of CoQ10 supplementation on OS parameters. Standard mean differences and 95% confidence intervals were calculated for net changes in OS parameters using a random-effects model. RESULTS Seventeen randomized clinical trials met the eligibility criteria to be included in the meta-analysis. Overall, CoQ10 supplementation was associated with a statistically significant decrease in malondialdehyde (MDA) (SMD - 0.94; 95% CI - 1.46, - 0.41; I2 = 87.7%) and a significant increase in total antioxidant capacity (TAC) (SMD 0.67; 95% CI 0.28, 1.07; I2 = 74.9%) and superoxide dismutase (SOD) activity (SMD 0.40; 95% CI 1.12, 0.67; I2 = 9.6%). The meta-analysis found no statistically significant impact of CoQ10 supplementation on nitric oxide (NO) (SMD - 1.40; 95% CI - 0.12, 1.93; I2 = 92.6%), glutathione (GSH) levels (SMD 0.41; 95% CI - 0.09, 0.91; I2 = 70.0%), catalase (CAT) activity (SMD 0.36; 95% CI - 0.46, 1.18; I2 = 90.0%), or glutathione peroxidase (GPx) activities (SMD - 1.40; 95% CI: - 0.12, 1.93; I2 = 92.6%). CONCLUSION CoQ10 supplementation, in the tested range of doses, was shown to reduce MDA concentrations, and increase TAC and antioxidant defense system enzymes. However, there were no significant effects of CoQ10 on NO, GSH concentrations, or CAT activity.
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Affiliation(s)
- Abolfazl Akbari
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Gholam Reza Mobini
- Cellular & Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences (SkUMS), Shahrekord, Iran
| | - Shahram Agah
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mojgan Morvaridzadeh
- Department of Nutritional Science, School of Nutritional Science and Food Technology, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Amirhossein Omidi
- Department of Nutritional Science, School of Nutritional Science and Food Technology, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Eric Potter
- Baylor Scott & White Research Institute, Dallas, Texas, USA
| | - Siavash Fazelian
- Clinical Research Development Unit, Ayatollah Kashani Hospital, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Seyed Hossein Ardehali
- Department of Anesthesiology and Critical Care, Shohadaye Tajrish Hospital, Tehran, Iran
| | - Elnaz Daneshzad
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Sadegh Dehghani
- Radiation Sciences Department, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran.
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Chaudary S, Karner L, Weidinger A, Meixner B, Rieger S, Metzger M, Zipperle J, Dungel P. In vitro effects of 635 nm photobiomodulation under hypoxia/reoxygenation culture conditions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2020; 209:111935. [PMID: 32622295 DOI: 10.1016/j.jphotobiol.2020.111935] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 05/15/2020] [Accepted: 06/10/2020] [Indexed: 12/18/2022]
Abstract
Photobiomodulation (PBM), especially in the red wavelength range, has been demonstrated to be an effective treatment option for superficial and chronic wounds. However, ischemia and subsequent reperfusion can further challenge wound healing. Therefore, we investigated the effect of pulsed red LED light at 635 nm on cellular function in an in-vitro model of hypoxia/reoxygenation (H/R) challenge. Mouse myoblasts and fibroblasts were incubated in oxygen-deprived starvation medium (hypoxia) for 3 h after which the media was changed to oxygenated, fully supplemented media to simulate reperfusion. Cells were then treated with pulsed red LED light at a wavelength of 635 nm at 40 mW/cm2. Mitochondrial respiratory activity, ATP production and ROS levels were analysed immediately post-illumination. The effects on cellular metabolic activity and proliferation were measured at 6 h and 24 h and apoptosis/necrosis was measured at 24 h post-illumination. Our results show that both cell types reacted differently to H/R challenge and PBM. PBM of H/R-challenged cells enhanced mitochondrial activity and rescued decreased ATP levels, with significant effects in fibroblasts. This was associated with increased cell proliferation rates in both cell types. The increase was again more pronounced in fibroblasts. Our study concluded that PBM with red LED light significantly restored ATP levels during H/R and effectively promoted cell growth under both normoxic and H/R conditions. In clinical applications, PBM has been repeatedly reported to resolve difficult clinical situations in which ischemia/reperfusion injuries are a major issue. Our study confirms the beneficial effects of PBM especially in H/R-challenged cells.
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Affiliation(s)
- Sidrah Chaudary
- Ludwig Boltzmann institute for experimental and clinical traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria
| | - Lisa Karner
- Ludwig Boltzmann institute for experimental and clinical traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria
| | - Adelheid Weidinger
- Ludwig Boltzmann institute for experimental and clinical traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria
| | - Barbara Meixner
- Ludwig Boltzmann institute for experimental and clinical traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria
| | - Stefan Rieger
- Ludwig Boltzmann institute for experimental and clinical traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria
| | - Magdalena Metzger
- Ludwig Boltzmann institute for experimental and clinical traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria
| | - Johannes Zipperle
- Ludwig Boltzmann institute for experimental and clinical traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria
| | - Peter Dungel
- Ludwig Boltzmann institute for experimental and clinical traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria.
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227
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Alterations in the Antioxidant Enzyme Activities in the Neurodevelopmental Rat Model of Schizophrenia Induced by Glutathione Deficiency during Early Postnatal Life. Antioxidants (Basel) 2020; 9:antiox9060538. [PMID: 32575563 PMCID: PMC7346228 DOI: 10.3390/antiox9060538] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/10/2020] [Accepted: 06/17/2020] [Indexed: 01/24/2023] Open
Abstract
The aim of the present study was to assess the effects of l-buthionine-(S,R)-sulfoximine (BSO), a glutathione (GSH) synthesis inhibitor, and GBR 12909, a dopamine reuptake inhibitor, administered alone or in combination to Sprague-Dawley rats during early postnatal development (p5-p16), on the levels of reactive oxygen species (ROS), lipid peroxidation (LP) and the activities of antioxidant enzymes: superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione disulfide reductase (GR) in peripheral tissues (liver, kidney) and selected brain structures (prefrontal cortex, PFC; hippocampus, HIP; and striatum, STR) of 16-day-old rats. The studied parameters were analyzed with reference to the content of GSH and sulfur amino acids, methionine (Met) and cysteine (Cys) described in our previous study. This analysis showed that treatment with a BSO + GBR 12909 combination caused significant decreases in the lipid peroxidation levels in the PFC and HIP, in spite of there being no changes in ROS. The reduction of lipid peroxidation indicates a weakening of the oxidative power of the cells, and a shift in balance in favor of reducing processes. Such changes in cellular redox signaling in the PFC and HIP during early postnatal development may result in functional changes in adulthood.
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228
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Bojková B, Winklewski PJ, Wszedybyl-Winklewska M. Dietary Fat and Cancer-Which Is Good, Which Is Bad, and the Body of Evidence. Int J Mol Sci 2020; 21:ijms21114114. [PMID: 32526973 PMCID: PMC7312362 DOI: 10.3390/ijms21114114] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/27/2020] [Accepted: 06/02/2020] [Indexed: 12/13/2022] Open
Abstract
A high-fat diet (HFD) induces changes in gut microbiota leading to activation of pro-inflammatory pathways, and obesity, as a consequence of overnutrition, exacerbates inflammation, a known risk factor not only for cancer. However, experimental data showed that the composition of dietary fat has a greater impact on the pathogenesis of cancer than the total fat content in isocaloric diets. Similarly, human studies did not prove that a decrease in total fat intake is an effective strategy to combat cancer. Saturated fat has long been considered as harmful, but the current consensus is that moderate intake of saturated fatty acids (SFAs), including palmitic acid (PA), does not pose a health risk within a balanced diet. In regard to monounsaturated fat, plant sources are recommended. The consumption of plant monounsaturated fatty acids (MUFAs), particularly from olive oil, has been associated with lower cancer risk. Similarly, the replacement of animal MUFAs with plant MUFAs decreased cancer mortality. The impact of polyunsaturated fatty acids (PUFAs) on cancer risk depends on the ratio between ω-6 and ω-3 PUFAs. In vivo data showed stimulatory effects of ω-6 PUFAs on tumour growth while ω-3 PUFAs were protective, but the results of human studies were not as promising as indicated in preclinical reports. As for trans FAs (TFAs), experimental data mostly showed opposite effects of industrially produced and natural TFAs, with the latter being protective against cancer progression, but human data are mixed, and no clear conclusion can be made. Further studies are warranted to establish the role of FAs in the control of cell growth in order to find an effective strategy for cancer prevention/treatment.
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Affiliation(s)
- Bianka Bojková
- Department of Animal Physiology, Institute of Biology and Ecology, Faculty of Science, P.J. Šafárik University in Košice, 041 54 Košice, Slovakia;
| | - Pawel J. Winklewski
- Department of Human Physiology, Medical University of Gdansk, 80-210 Gdansk, Poland;
- Department of Anatomy and Physiology, Pomeranian University of Slupsk, 76-200 Slupsk, Poland
- Correspondence: ; Tel./Fax: +48-58-3491515
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Feng Q, Li Y, Wang N, Hao Y, Chang J, Wang Z, Zhang X, Zhang Z, Wang L. A Biomimetic Nanogenerator of Reactive Nitrogen Species Based on Battlefield Transfer Strategy for Enhanced Immunotherapy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002138. [PMID: 32468692 DOI: 10.1002/smll.202002138] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/24/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
Currently, cell membrane is always utilized for the construction of biomimetic nanoparticles. By contrast, mimicking the intracellular activity seems more meaningful. Inspired by the specific killing mechanism of deoxy-hemoglobin (Hb) dependent drug (RRx-001) in hypoxic red blood cells (RBC), this work aims to develop an inner and outer RBC-biomimetic antitumor nanoplatform that replicates both membrane surface properties and intracellularly certain therapeutic mechanisms of RRx-001 in hypoxic RBC. Herein, RRx-001 and Hb are introduced into RBC membrane camouflaged TiO2 nanoparticles. Upon arrival at hypoxic tumor microenvironment (TME), the biomimetic nanoplatform (R@HTR) is activated and triggers a series of reactions to generate reactive nitrogen species (RNS). More importantly, the potent antitumor immunity and immunomodulatory function of RNS in TME are demonstrated. Such an idea would transfer the battlefield of RRx-001 from hypoxic RBC to hypoxic TME, enhancing its combat capability. As a proof of concept, this biomimetic nanoreactor of RNS exhibits efficient tumor regression and metastasis prevention. The battlefield transfer strategy would not only present meaningful insights for immunotherapy, but also realize substantial breakthroughs in biomimetic nanotechnology.
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Affiliation(s)
- Qianhua Feng
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, P. R. China
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Zhengzhou, Henan Province, 450001, China
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, Henan Province, 450001, China
- School of Chemistry and Molecular Engineering, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, China
| | - Yuzhen Li
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, 132 Waihuan East Road, Guangzhou, 510006, China
| | - Ning Wang
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, P. R. China
| | - Yutong Hao
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, P. R. China
| | - Junbiao Chang
- School of Chemistry and Molecular Engineering, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, China
| | - Zeying Wang
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, P. R. China
| | - Xueli Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, P. R. China
| | - Zhenzhong Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, P. R. China
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Zhengzhou, Henan Province, 450001, China
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, Henan Province, 450001, China
| | - Lei Wang
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, P. R. China
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Zhengzhou, Henan Province, 450001, China
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, Henan Province, 450001, China
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230
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Choi YM, Kim H, Lee SA, Lee SY, Kim BJ. A Telomerase-Derived Peptide Exerts an Anti-Hepatitis B Virus Effect via Mitochondrial DNA Stress-Dependent Type I Interferon Production. Front Immunol 2020; 11:652. [PMID: 32508804 PMCID: PMC7253625 DOI: 10.3389/fimmu.2020.00652] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 03/23/2020] [Indexed: 01/14/2023] Open
Abstract
Previously, a telomerase-derived 16-mer peptide, GV1001, developed as an anticancer vaccine, was reported to exert antiviral effects on human immunodeficiency virus or hepatitis C virus in a heat shock protein-dependent manner. Here we investigated whether GV1001 exerts antiviral effects on hepatitis B virus (HBV) and elucidated its underlying mechanisms. GV1001 inhibited HBV replication and hepatitis B surface antigen (HBsAg) secretion in a dose-dependent manner, showing synergistic antiviral effects with nucleos(t)ide analogs (NAs) including entecavir and lamivudine. This peptide also inhibited viral cccDNA and pgRNA. The intravenous GV1001 treatment of transgenic mice had anti-HBV effects. Our mechanistic studies revealed that GV1001 suppresses HBV replication by inhibiting capsid formation via type I interferon-mediated induction of heme oxygenase-1 (HO-1). GV1001 promoted the mitochondrial DNA stress-mediated release of oxidized DNA into the cytosol, resulting in IFN-I-dependent anti-HBV effects via the STING-IRF3 axis. We found that the anti-HBV effect of GV1001 was due to its ability to penetrate into the cytosol via extracellular heat shock protein, leading to phagosomal escape-mediated mtDNA stress. We demonstrated that the cell-penetrating and cytosolic localization capacity of GV1001 results in antiviral effects on HBV infections via mtDNA stress-mediated IFN-I production. Thus, GV1001, a peptide proven to be safe for human use, may be an anti-HBV drug that can be synergistically used with nucleot(s)ide analog.
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Affiliation(s)
- Yu-Min Choi
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - Hong Kim
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - Seoung-Ae Lee
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - So-Young Lee
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - Bum-Joon Kim
- Department of Microbiology and Immunology, Biomedical Sciences, Liver Research Institute and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
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231
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Mantri Y, Davidi B, Lemaster JE, Hariri A, Jokerst JV. Iodide-doped precious metal nanoparticles: measuring oxidative stress in vivo via photoacoustic imaging. NANOSCALE 2020; 12:10511-10520. [PMID: 32396928 PMCID: PMC7331795 DOI: 10.1039/d0nr03047c] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Accumulation of reactive oxygen and nitrogen species (RONS) can induce cell damage and even cell death. RONS are short-lived species, which makes direct, precise, and real-time measurement difficult. Biologically-relevant RONS levels are in the nM-μM scale; hence, there is a need for highly sensitive RONS probes. We previously used hybrid gold-core silver-shell nanoparticles with mM sensitivity to H2O2. These particles reported the presence of RONS via spectral shifts which could easily be quantified via photoacoustic imaging. Here, we used halide doping to tune the electrochemical properties of these materials to better match the oxidation potential of RONS. This work describes the synthesis, characterization, and application of these AgI-coated gold nanorods (AgI/AuNR). The I : Ag molar ratio, pH, and initial Ag shell thickness were optimized for good RONS detection limits. Halide doping lowers the reduction potential of Ag from to resulting in a 1000-fold increase in H2O2 and 100 000-fold increase in ONOO- sensitivity. The AgI/AuNR system also etches 45-times faster than undoped Ag/AuNR. The AgI/AuNR easily reported the endogenously produced RONS in established cells lines as well as murine models.
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Affiliation(s)
- Yash Mantri
- Department of Bioengineering University of California, San Diego, La Jolla, CA, USA
| | - Barak Davidi
- Department of Physics, Fairfield University, Fairfield, CT, USA
| | - Jeanne E Lemaster
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA, USA.
| | - Ali Hariri
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA, USA.
| | - Jesse V Jokerst
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA, USA. and Materials Science Program, University of California, San Diego, La Jolla, CA, USA and Department of Radiology, University of California, San Diego, La Jolla, CA, USA
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232
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Alkhalaf MI, Hussein RH, Hamza A. Green synthesis of silver nanoparticles by Nigella sativa extract alleviates diabetic neuropathy through anti-inflammatory and antioxidant effects. Saudi J Biol Sci 2020; 27:2410-2419. [PMID: 32884424 PMCID: PMC7451673 DOI: 10.1016/j.sjbs.2020.05.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/29/2020] [Accepted: 05/02/2020] [Indexed: 10/27/2022] Open
Abstract
Green synthesis of silver nanoparticles has gained great interest among scientists. In view of this data, we conducted this study to identify the ameliorative effect of green synthesis of silver nanoparticles using Nigella sativa extract in diabetic neuropathy induced experimentally. In this study, 50 adult male albino rats were used and they were randomly divided into five groups; the first group was the healthy control group, the second group were the diabetic neuropathy diabetic neuropathy induced, Groups (3-6) diabetic neuropathy induced group and treated with silver nanoparticles, Nigella sativa extract and green synthesized silver nanoparticles using Nigella sativa extract respectively. Biochemical parameters including diabetic, inflammatory and antioxidant biomarkers were evaluated. Brain histopathology was also performed. Results revealed substantial rise in glucose, AGE, aldose reductase with insulin reduction in diabetic neuropathy induced group as compared to healthy control. Also, inflammatory markers increased significantly in diabetic neuropathy induced group. A remarkable change in oxidative status was observed in the same group. Furthermore, significant decline in nitrotyrosin level was observed. Regarding gene expression, we found significant down regulation in brain TKr A accompanied by upregulation of nerve growth factor in diabetic neuropathy group comparing with healthy control. Several treatments for diabetic neuropathy remarkably ameliorate all the investigated biomarkers. Histological findings are greatly relied on for the results achieved in this study. Therefore, it can be established that green synthesis of silver nanoparticles in combination with Nigella sativa extract could be a newly neuroprotective agents against inflammation and oxidative stress characterizing diabetic neuropathy through their antidiabetic, anti-inflammatory and anti-oxidants effects.
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Affiliation(s)
- Maha I Alkhalaf
- Biochemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.,Biochemistry Department, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Rasha H Hussein
- Biochemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.,Biochemistry Department, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia.,Biochemistry and Nutrition Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt
| | - Amal Hamza
- Biochemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.,Biochemistry Department, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia.,Biochemistry and Nutrition Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt
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233
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Warraich UEA, Hussain F, Kayani HUR. Aging - Oxidative stress, antioxidants and computational modeling. Heliyon 2020; 6:e04107. [PMID: 32509998 PMCID: PMC7264715 DOI: 10.1016/j.heliyon.2020.e04107] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/12/2020] [Accepted: 05/27/2020] [Indexed: 12/22/2022] Open
Abstract
Aging is a degenerative, biological, time-dependent, universally conserved process thus designed as one of the highest known risk factors for morbidity and mortality. Every individual has its own aging mechanisms as both environmental conditions (75%) and genetics (25%) account for aging. Several theories have been proposed until now but not even a single theory solves this mystery. There are still some queries un-answered to the scientific community regarding mechanisms behind aging. However, oxidative stress theory (OST) is considered one of the famous theories that sees mitochondria as one of the leading organelles which largely contribute to the aging process. Many reactive oxygen species (ROS) are produced endogenously and exogenously that are associated with aging. But the mitochondrial ROS contribute largely to the aging process as mitochondrial dysfunction due to oxidative stress is considered one of the contributors toward aging. Although ROS is known to damage cell machinery, new evidence suggests their role in signal transduction to regulate biological and physiological processes. Moreover, besides mitochondria, other important cell organelles such as peroxisome and endoplasmic reticulum also produce ROS that contribute to aging. However, nature has provided humans with free radical scavengers called antioxidants that protect from harmful effects of ROS. Future predictions regarding aging, biochemical mechanisms involved, biomarkers internal and external factors can be easily done with machine learning algorithms and other computational models. This review explains important aspects of aging, the contribution of ROS producing organelles in aging, importance of antioxidants fighting against ROS, different computational models developed to understand the complexities of the aging.
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Affiliation(s)
- Umm-e-Ammara Warraich
- Department of Biochemistry, Faculty of Sciences, University of Agriculture, Faisalabad, Pakistan
| | - Fatma Hussain
- Department of Biochemistry, Faculty of Sciences, University of Agriculture, Faisalabad, Pakistan
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Abstract
Modern broilers show dramatic growth over a short interval and contribute directly to the success of the poultry meat industry. The growth performance of commercial broilers is a result of genetic selection for "performance traits", such as body size, meat yield, and feed conversion rate. However, due to the rapid growth rate of modern commercial broilers, several growth-related conditions have arisen, increasing economic losses and consumer concerns. Among the most economically consequential is the muscle disorder called wooden breast. Together with associated myopathies such as white striping and spaghetti meat, wooden breast is causing losses of $200 million a year in the U.S. alone and occurs worldwide. No causative factors are known for wooden breast to date. Wooden breast can affect over 80% of broilers in a flock, yet no methods of amelioration are currently available. Overall, the evidence suggests that wooden breast is a genetic, age-dependent condition associated with fast growth rate. The primary features of wooden breast are muscle degeneration and fibrosis, high levels of oxidative stress, hypoxia, and altered energy metabolism. Recent work has also implicated reduced pectoral vessel density in the pathogenesis of wooden breast. This review examines the history of myopathies in commercial broilers and the relationship of myopathies to metabolism and oxidative performance. This review summarizes the foundational knowledge of wooden breast and provides a platform for further investigation of wooden breast.
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235
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Characterization of Antimicrobial Effects of Plasma-Treated Water (PTW) Produced by Microwave-Induced Plasma (MidiPLexc) on Pseudomonas fluorescens Biofilms. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10093118] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
For the decontamination of surfaces in the food production industry, plasma-generated compounds such as plasma-treated water or plasma-processed air offer many promising possibilities for future applications. Therefore, the antimicrobial effect of water treated with microwave-induced plasma (MidiPLexc) on Pseudomonas fluorescens biofilms was investigated. A total of 10 mL deionized water was treated with the MidiPLexc plasma source for 100, 300 and 900 s (pretreatment time) and the bacterial biofilms were exposed to the plasma-treated water for 1, 3 and 5 min (post-treatment time). To investigate the influence of plasma-treated water on P. fluorescens biofilms, microbiological assays (colony-forming units, fluorescence and XTT assay) and imaging techniques (fluorescence microscopy, confocal laser scanning microscopy, and atomic force microscopy) were used. The colony-forming units showed a maximum reduction of 6 log10 by using 300 s pretreated plasma water for 5 min. Additionally, a maximum reduction of 81% for the viability of the cells and a 92% reduction in the metabolic activity of the cells were achieved by using 900 s pretreated plasma water for 5 min. The microscopic images showed evident microbial inactivation within the biofilm even at the shortest pretreatment (100 s) and post-treatment (1 min) times. Moreover, reduction of the biofilm thickness and increased cluster formation within the biofilm was detected. Morphologically, the fusion of cell walls into a uniform dense cell mass was detectable. The findings correlated with a decrease in the pH value of the plasma-treated water, which forms the basis for the chemically active components of plasma-treated water and its antimicrobial effects. These results provide valuable insights into the mechanisms of inactivation of biofilms by plasma-generated compounds such as plasma-treated water and thus allow for further parameter adjustment for applications in food industry.
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236
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Qu Z, Liu L, Sun T, Hou J, Sun Y, Yu M, Diao Y, Lu S, Zhao W, Wang L. Synthesis of bifunctional carbon quantum dots for bioimaging and anti-inflammation. NANOTECHNOLOGY 2020; 31:175102. [PMID: 31935712 DOI: 10.1088/1361-6528/ab6b9d] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Carbon quantum dots (CDs) have attracted increased attention in recent decades because of their various applications in biosensing, bioimaging and drug delivery. In the present study, we have synthesized bifunctional ibuprofen-based carbon quantum dots (ICDs) using a simple one-step microwave-assisted method, for simultaneous bioimaging and anti-inflammatory effects. The ICDs exhibited high stability, low toxicity, negligible cytotoxicity and good biocompatibility in water. In particular, the produced ICDs demonstrated a decent imaging ability and excellent anti-inflammatory effects in vivo, making them potentially useful in bioimaging and future clinical treatment. Our results demonstrated that ICDs show promise in applications such as multifunctional biomaterials, depending on the selection of carbon sources, which would provide important guidance for the future design of multifunctional CDs in the field of biomedicine.
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Affiliation(s)
- Zheng Qu
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin 150040, People's Republic of China
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237
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Moldogazieva NT, Mokhosoev IM, Mel'nikova TI, Zavadskiy SP, Kuz'menko AN, Terentiev AA. Dual Character of Reactive Oxygen, Nitrogen, and Halogen Species: Endogenous Sources, Interconversions and Neutralization. BIOCHEMISTRY (MOSCOW) 2020; 85:S56-S78. [PMID: 32087054 DOI: 10.1134/s0006297920140047] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Oxidative stress resulting from accumulation of reactive oxygen, nitrogen, and halogen species (ROS, RNS, and RHS, respectively) causes the damage of cells and biomolecules. However, over the long evolutionary time, living organisms have developed the mechanisms for adaptation to oxidative stress conditions including the activity of the antioxidant system (AOS), which maintains low intracellular levels of RONS (ROS and RNS) and RHS. Moreover, living organisms have adapted to use low concentrations of these electrophiles for the regulation of cell functions through the reversible post-translational chemical modifications of redox-sensitive amino acid residues in intracellular effectors of signal transduction pathways (protein kinases and protein phosphatases), transcription factors, etc. An important fine-tuning mechanism that ensures involvement of RONS and RHS in the regulation of physiological processes is interconversion between different reactive species. This review focuses on the complex networks of interacting RONS and RHS types and their endogenous sources, such as NOX family of NADPH oxidases, complexes I and III of the mitochondrial electron transport chain, NO synthases, cytochrome P450-containing monooxygenase system, xanthine oxidoreductase, and myeloperoxidases. We highlight that kinetic parameters of reactions involving RONS and RHS determine the effects of these reactive species on cell functions. We also describe the functioning of enzymatic and non-enzymatic AOS components and the mechanisms of RONS and RHS scavenging under physiological conditions. We believe that analysis of interactions between RONS and relationships between different endogenous sources of these compounds will contribute to better understanding of their role in the maintenance of cell redox homeostasis as well as initiation and progression of diseases.
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Affiliation(s)
- N T Moldogazieva
- Sechenov First Moscow State Medical University, Moscow, 119991, Russia.
| | - I M Mokhosoev
- Pirogov Russian National Research Medical University, Moscow, 117997, Russia.
| | - T I Mel'nikova
- Sechenov First Moscow State Medical University, Moscow, 119991, Russia
| | - S P Zavadskiy
- Sechenov First Moscow State Medical University, Moscow, 119991, Russia
| | - A N Kuz'menko
- Sechenov First Moscow State Medical University, Moscow, 119991, Russia
| | - A A Terentiev
- Pirogov Russian National Research Medical University, Moscow, 117997, Russia
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238
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Wang G, Ahmeda A, Malek Z, Mansooridara S, Zangeneh A, Zangeneh MM. Chemical characterization and therapeutic properties of
Achillea biebersteinii
leaf aqueous extract synthesized copper nanoparticles against methamphetamine‐induced cell death in PC12: A study in the nanotechnology and neurology fields. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5488] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Gang Wang
- Department of Neurosurgery Xi'an No.1 Hospital, No.30 South Street Powder Lane, Beilin District Xi'an Shaanxi Province 710002 China
| | - Ahmad Ahmeda
- College of Medicine, QU HealthQatar University Doha Qatar
| | - Zahra Malek
- Medical Sciences Research Center, Faculty of Medicine, Tehran Medical Sciences BranchIslamic Azad University Tehran Iran
| | - Shirin Mansooridara
- Medical Sciences Research Center, Faculty of Medicine, Tehran Medical Sciences BranchIslamic Azad University Tehran Iran
| | - Akram Zangeneh
- Department of Clinical Sciences, Faculty of Veterinary MedicineRazi University Kermanshah Iran
- Biotechnology and Medicinal Plants Research CenterIlam University of Medical Sciences Ilam Iran
| | - Mohammad Mahdi Zangeneh
- Department of Clinical Sciences, Faculty of Veterinary MedicineRazi University Kermanshah Iran
- Biotechnology and Medicinal Plants Research CenterIlam University of Medical Sciences Ilam Iran
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239
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Kadlec M, Ros-Santaella JL, Pintus E. The Roles of NO and H 2S in Sperm Biology: Recent Advances and New Perspectives. Int J Mol Sci 2020; 21:E2174. [PMID: 32245265 PMCID: PMC7139502 DOI: 10.3390/ijms21062174] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/10/2020] [Accepted: 03/18/2020] [Indexed: 01/24/2023] Open
Abstract
After being historically considered as noxious agents, nitric oxide (NO) and hydrogen sulfide (H2S) are now listed as gasotransmitters, gaseous molecules that play a key role in a variety of cellular functions. Both NO and H2S are endogenously produced, enzymatically or non-enzymatically, and interact with each other in a range of cells and tissues. In spite of the great advances achieved in recent decades in other biological systems, knowledge about H2S function and interactions with NO in sperm biology is in its infancy. Here, we aim to provide an update on the importance of these molecules in the physiology of the male gamete. Special emphasis is given to the most recent advances in the metabolism, mechanisms of action, and effects (both physiological and pathophysiological) of these gasotransmitters. This manuscript also illustrates the physiological implications of NO and H2S observed in other cell types, which might be important for sperm function. The relevance of these gasotransmitters to several signaling pathways within sperm cells highlights their potential use for the improvement and successful application of assisted reproductive technologies.
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Affiliation(s)
| | | | - Eliana Pintus
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Praha 6-Suchdol, Czech Republic; (M.K.); (J.L.R.-S.)
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240
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Dragic S, Momcicevic D, Zlojutro B, Jandric M, Kovacevic T, Djajić V, Gajić A, Talić G, Kovacevic P. Serum levels of nitric oxide and endothelin-1 in vasculopathy managed with hyperbaric oxygen therapy. Clin Hemorheol Microcirc 2020; 75:233-241. [PMID: 32116239 DOI: 10.3233/ch-190796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Roles of nitric oxide (NO) and endothelin-1 (ET-1) in the local regulation of blood flow under physiological conditions are important and well known, while data on their effects and interactions in conditions of hyperbaric hyperoxia is still insufficient. This was a prospective observational study which included patients who underwent hyperbaric oxygen therapy (HBOT) in accordance with existing therapeutic protocol for peripherial arterial disease (PAD) during time period of six months, between january and july of 2016. Clinical stage of PAD according to Fontain was taken into account, as well as risk factors, demographic, anthropometric and clinical characteristics of studied patients. The study included 64 patients with a mean age (±Sd) 60.2±12.7 years, of whom 28 were female. Patients' NO serum levels in all observed categories before and after HBOT were not signifficantly different, except for stage II PAD (NObefore HBOT 21.9±9.6 vs. NOafter HBOT 26.2±12.1 (p = 0.04)). On the contrary, in all studied patients ET-1 level increased signifficantly after HBOT (ET-1before HBOT 4.2±11.6 vs. ET-1after 18.3±21.0 (p < 0.001)). Treatment of PAD using HBOT leads to the predominance of vasoconstrictor effects probably caused by elevation of serum ET-1 concentrations, while other factors such as exposure time to hyperbaric conditions, activation of antioxidant molecules, and the influx of other interfering substances must be considered in interpreting the effects of NO molecules.
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Affiliation(s)
- Sasa Dragic
- Medical Intensive Care Unit, University Clinical Centre of Republic of Srpska, Banja Luka, Republic of Srpska, Bosnia and Herzegovina.,Pan- European University "Apeiron", College of Health Sciences, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
| | - Danica Momcicevic
- Medical Intensive Care Unit, University Clinical Centre of Republic of Srpska, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
| | - Biljana Zlojutro
- Medical Intensive Care Unit, University Clinical Centre of Republic of Srpska, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
| | - Milka Jandric
- Medical Intensive Care Unit, University Clinical Centre of Republic of Srpska, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
| | - Tijana Kovacevic
- Pharmacy Department, University Clinical Centre of Republic of Srpska, Banja Luka, Republic of Srpska, Bosnia and Herzegovina.,Faculty of Medicine, University of Banja Luka, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
| | - Vlado Djajić
- Faculty of Medicine, University of Banja Luka, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
| | - Aleksandar Gajić
- Institute for the Physical Medicine and Rehabilitation "dr. Miroslav Zotovic" Banja Luka, Republic of Srpska, Bosnia and Herzegovina
| | - Goran Talić
- Institute for the Physical Medicine and Rehabilitation "dr. Miroslav Zotovic" Banja Luka, Republic of Srpska, Bosnia and Herzegovina.,Faculty of Medicine, University of Banja Luka, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
| | - Pedja Kovacevic
- Medical Intensive Care Unit, University Clinical Centre of Republic of Srpska, Banja Luka, Republic of Srpska, Bosnia and Herzegovina.,Faculty of Medicine, University of Banja Luka, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
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241
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Shanmugam S, Shankar K, Ramachandiran S, Naidu K, Kalimuthu K, Muthuvel A. In Vitro Studies and Characterization of Tissue Protein from Green Mussel, Perna viridis (Linnaeus, 1758) for Antioxidant and Antibacterial Potential. Int J Pept Res Ther 2020. [DOI: 10.1007/s10989-019-09825-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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242
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Hricovíniová J, Ševčovičová A, Hricovíniová Z. Evaluation of the genotoxic, DNA-protective and antioxidant profile of synthetic alkyl gallates and gallotannins using in vitro assays. Toxicol In Vitro 2020; 65:104789. [PMID: 32035223 DOI: 10.1016/j.tiv.2020.104789] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/14/2020] [Accepted: 02/04/2020] [Indexed: 02/07/2023]
Abstract
New gallotanins, methyl 2,3,4,6-tetra-O-galloyl-α-D-glucoside (G4Glc), methyl 2,3,4,6-tetra-O-galloyl-α-D-mannoside (G4Man), and methyl 2,3,4-tri-O-galloyl-α-L-rhamnoside (G3Rham), have been synthesized in order to study the protective effects of synthetic polyphenols that are structurally related with natural compounds. Apart from spectral analysis, examination of antioxidant ability and protective efficiency showed the differences among newly prepared compounds and commercial antioxidants - gallic acid (GA), methyl gallate (MG), and octyl gallate (OG) applying radical scavenging 1,1-diphenyl-2-picryl-hydrazyl (DPPH), reducing power and iron-chelating assays. The genotoxicity and DNA-protective potential of tested compounds on human peripheral blood mononuclear cells (PBMCs) were evaluated using the single-cell gel electrophoresis (comet assay) and DNA-topology assay. Experimental data revealed that gallotannins G3Rham, G4Man, and G4Glc possess significant radical scavenging/antioxidant activities and manifest very low genotoxic effect on human PBMCs. Moreover, tested compounds considerably reduce the level of DNA damage induced by hydrogen peroxide or Fe2+-ions. The results imply that new synthetic gallotannins can be considered as nontoxic agents for subsequent design of new antioxidants with potential biomedical applications.
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Affiliation(s)
- Jana Hricovíniová
- Cancer Research Institute, Biomedical Research Center, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05 Bratislava, Slovak Republic
| | - Andrea Ševčovičová
- Department of Genetics, Faculty of Natural Sciences Comenius University, Mlynská dolina, 842 15 Bratislava, Slovak Republic
| | - Zuzana Hricovíniová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovak Republic.
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243
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Toro-Urrego N, Turner LF, Avila-Rodriguez MF. New Insights into Oxidative Damage and Iron Associated Impairment in Traumatic Brain Injury. Curr Pharm Des 2020; 25:4737-4746. [DOI: 10.2174/1381612825666191111153802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 10/28/2019] [Indexed: 12/14/2022]
Abstract
:
Traumatic Brain Injury is considered one of the most prevalent causes of death around the world; more
than seventy millions of individuals sustain the condition per year. The consequences of traumatic brain injury on
brain tissue are complex and multifactorial, hence, the current palliative treatments are limited to improve patients’
quality of life. The subsequent hemorrhage caused by trauma and the ongoing oxidative process generated
by biochemical disturbances in the in the brain tissue may increase iron levels and reactive oxygen species. The
relationship between oxidative damage and the traumatic brain injury is well known, for that reason, diminishing
factors that potentiate the production of reactive oxygen species have a promissory therapeutic use. Iron chelators
are molecules capable of scavenging the oxidative damage from the brain tissue and are currently in use for ironoverload-
derived diseases.
:
Here, we show an updated overview of the underlying mechanisms of the oxidative damage after traumatic brain
injury. Later, we introduced the potential use of iron chelators as neuroprotective compounds for traumatic brain
injury, highlighting the action mechanisms of iron chelators and their current clinical applications.
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Affiliation(s)
- Nicolas Toro-Urrego
- Laboratorio de Citoarquitectura y Plasticidad Neuronal, Instituto de Investigaciones Cardiológicas, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Liliana F. Turner
- Grupo Modelos Experimentales para las Ciencias Zoohumanas - Departamento de Biología Facultad de Ciencias, Universidad del Tolima- Ibagué, Tolima, Colombia
| | - Marco F. Avila-Rodriguez
- Grupo Modelos Experimentales para las Ciencias Zoohumanas - Departamento de Ciencias Clínicas- Facultad de Ciencias de la Salud, Universidad del Tolima- Ibagué, Tolima, Colombia
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244
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Shahriari M, Hemmati S, Zangeneh A, Zangeneh MM. Decoration of silver nanoparticles on multi‐walled carbon nanotubes: Investigation of its anti‐acute leukemia property against acute myeloid leukemia and acute T cell leukemia. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5476] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Maryam Shahriari
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical SciencesIslamic Azad University Tehran Iran
| | - Saba Hemmati
- Department of ChemistryPayame Noor University Tehran Iran
| | - Akram Zangeneh
- Department of Clinical Sciences, Faculty of Veterinary MedicineRazi University Kermanshah Iran
- Biotechnology and Medicinal Plants Research CenterIlam University of Medical Sciences Ilam Iran
| | - Mohammad Mahdi Zangeneh
- Department of Clinical Sciences, Faculty of Veterinary MedicineRazi University Kermanshah Iran
- Biotechnology and Medicinal Plants Research CenterIlam University of Medical Sciences Ilam Iran
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245
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Ben Ahmed Z, Mohamed Y, Johan V, Dejaegher B, Demeyer K, Vander Heyden Y. Defining a standardized methodology for the determination of the antioxidant capacity: case study of Pistacia atlantica leaves. Analyst 2020; 145:557-571. [DOI: 10.1039/c9an01643k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Antioxidant activity can be measured by a variety of methods, that include hydrogen atom transfer (HAT) and single electron transfer (ET) methods.
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Affiliation(s)
- Ziyad Ben Ahmed
- Laboratory of Science Fundamental University Amar Telidji
- BP37G Laghouat
- Algeria
- Department of Analytical Chemistry
- Applied Chemometricsand Molecular Modelling
| | - Yousfi Mohamed
- Laboratory of Science Fundamental University Amar Telidji
- BP37G Laghouat
- Algeria
| | - Viaene Johan
- Department of Analytical Chemistry
- Applied Chemometricsand Molecular Modelling
- Vrije Universiteit Brussel (VUB)
- B-1090 Brussels
- Belgium
| | - Bieke Dejaegher
- Department of Analytical Chemistry
- Applied Chemometricsand Molecular Modelling
- Vrije Universiteit Brussel (VUB)
- B-1090 Brussels
- Belgium
| | - Kristiaan Demeyer
- Department of Toxicology
- Dermato-Cosmetology and Pharmacognosy
- VrijeUniversiteit Brussel (VUB)
- B-1030 Brussels
- Belgium
| | - Yvan Vander Heyden
- Department of Analytical Chemistry
- Applied Chemometricsand Molecular Modelling
- Vrije Universiteit Brussel (VUB)
- B-1090 Brussels
- Belgium
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246
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Hu J, Yang L, Yang P, Jiang S, Liu X, Li Y. Polydopamine free radical scavengers. Biomater Sci 2020; 8:4940-4950. [DOI: 10.1039/d0bm01070g] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This feature article summarizes the recent progress, challenges and future directions of free radical scavengers based on polydopamine, including the integrated mechanism, current regulating strategies, and kinds of biomedical applications.
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Affiliation(s)
- Junfei Hu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Lei Yang
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Peng Yang
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Shaohua Jiang
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources
- College of Materials Science and Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xianhu Liu
- National Engineering Research Center for Advanced Polymer Processing Technology
- Zhengzhou University
- Zhengzhou 450002
- China
| | - Yiwen Li
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
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247
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O’Flaherty C, Boisvert A, Manku G, Culty M. Protective Role of Peroxiredoxins against Reactive Oxygen Species in Neonatal Rat Testicular Gonocytes. Antioxidants (Basel) 2019; 9:antiox9010032. [PMID: 31905831 PMCID: PMC7022870 DOI: 10.3390/antiox9010032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/23/2019] [Accepted: 12/25/2019] [Indexed: 12/27/2022] Open
Abstract
Peroxiredoxins (PRDXs) are antioxidant enzymes that protect cells from oxidative stress and play a role in reactive oxygen species (ROS)-mediated signaling. We reported that PRDXs are critical for human fertility by maintaining sperm viability and regulating ROS levels during capacitation. Moreover, studies on Prdx6−/− mice revealed the essential role of PRDX6 in the viability, motility, and fertility competence of spermatozoa. Although PRDXs are abundant in the testis and spermatozoa, their potential role at different phases of spermatogenesis and in perinatal germ cells is unknown. Here, we examined the expression and role of PRDXs in isolated rat neonatal gonocytes, the precursors of spermatogonia, including spermatogonial stem cells. Gene array, qPCR analyses showed that PRDX1, 2, 3, 5, and 6 transcripts are among the most abundant antioxidant genes in postnatal day (PND) 3 gonocytes, while immunofluorescence confirmed the expression of PRDX1, 2, and 6 proteins. The role of PRDXs in gonocyte viability was examined using PRDX inhibitors, revealing that the 2-Cys PRDXs and PRDX6 peroxidases activities are critical for gonocytes viability in basal condition, likely preventing an excessive accumulation of endogenous ROS in the cells. In contrast to its crucial role in spermatozoa, PRDX6 independent phospholipase A2 (iPLA2) activity was not critical in gonocytes in basal conditions. However, under conditions of H2O2-induced oxidative stress, all these enzymatic activities were critical to maintain gonocyte viability. The inhibition of PRDXs promoted a two-fold increase in lipid peroxidation and prevented gonocyte differentiation. These results suggest that ROS are produced in neonatal gonocytes, where they are maintained by PRDXs at levels that are non-toxic and permissive for cell differentiation. These findings show that PRDXs play a major role in the antioxidant machinery of gonocytes, to maintain cell viability and allow for differentiation.
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Affiliation(s)
- Cristian O’Flaherty
- The Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (C.O.); (A.B.); (G.M.)
- Department of Surgery (Urology Division), McGill University, Montreal, QC H4A 3J1, Canada
| | - Annie Boisvert
- The Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (C.O.); (A.B.); (G.M.)
| | - Gurpreet Manku
- The Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (C.O.); (A.B.); (G.M.)
- Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
| | - Martine Culty
- The Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada; (C.O.); (A.B.); (G.M.)
- Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California School of Pharmacy, Los Angeles, CA 90089, USA
- Correspondence: ; Tel.: +1-323-865-1677
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248
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He Y, Jiang K, Zhao X. Taraxasterol protects hippocampal neurons from oxygen-glucose deprivation-induced injury through activation of Nrf2 signalling pathway. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 48:252-258. [PMID: 31851841 DOI: 10.1080/21691401.2019.1699831] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yun He
- Department of Neurology, AnKang Central Hospital, AnKang, China
| | - Kaifu Jiang
- Department of Neurology, AnKang Central Hospital, AnKang, China
| | - Xue Zhao
- Department of Neurology, AnKang Central Hospital, AnKang, China
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249
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Yardeni G, Meyerstein D, Kats L, Cohen H, Zilbermann I, Maimon E. On the reactions of methyl radicals with nitrilotris(methylenephosphonic-acid) complexes in aqueous solutions. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1698736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Guy Yardeni
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Dan Meyerstein
- Chemical Sciences Department, The Radical Research Centre and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Applications, Ariel University, Ariel, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Lioubov Kats
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Haim Cohen
- Chemical Sciences Department, The Radical Research Centre and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Applications, Ariel University, Ariel, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Israel Zilbermann
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Eric Maimon
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
- Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Manganese Porphyrin-Based SOD Mimetics Produce Polysulfides from Hydrogen Sulfide. Antioxidants (Basel) 2019; 8:antiox8120639. [PMID: 31842297 PMCID: PMC6943712 DOI: 10.3390/antiox8120639] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/04/2019] [Accepted: 12/06/2019] [Indexed: 02/07/2023] Open
Abstract
Manganese-centered porphyrins (MnPs), MnTE-2-PyP5+ (MnTE), MnTnHex-2-PyP5+ (MnTnHex), and MnTnBuOE-2-PyP5+ (MnTnBuOE) have received considerable attention because of their ability to serve as superoxide dismutase (SOD) mimetics thereby producing hydrogen peroxide (H2O2), and oxidants of ascorbate and simple aminothiols or protein thiols. MnTE-2-PyP5+ and MnTnBuOE-2-PyP5+ are now in five Phase II clinical trials warranting further exploration of their rich redox-based biology. Previously, we reported that SOD is also a sulfide oxidase catalyzing the oxidation of hydrogen sulfide (H2S) to hydrogen persulfide (H2S2) and longer-chain polysulfides (H2Sn, n = 3–7). We hypothesized that MnPs may have similar actions on sulfide metabolism. H2S and polysulfides were monitored in fluorimetric assays with 7-azido-4-methylcoumarin (AzMC) and 3′,6′-di(O-thiosalicyl)fluorescein (SSP4), respectively, and specific polysulfides were further identified by mass spectrometry. MnPs concentration-dependently consumed H2S and produced H2S2 and subsequently longer-chain polysulfides. This reaction appeared to be O2-dependent. MnP absorbance spectra exhibited wavelength shifts in the Soret and Q bands characteristic of sulfide-mediated reduction of Mn. Taken together, our results suggest that MnPs can become efficacious activators of a variety of cytoprotective processes by acting as sulfide oxidation catalysts generating per/polysulfides.
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