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He Q, Qi Q, Ibeanu GC, Li PA. B355252 Suppresses LPS-Induced Neuroinflammation in the Mouse Brain. Brain Sci 2024; 14:467. [PMID: 38790446 PMCID: PMC11119117 DOI: 10.3390/brainsci14050467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/29/2024] [Accepted: 05/01/2024] [Indexed: 05/26/2024] Open
Abstract
B355252 is a small molecular compound known for potentiating neural growth factor and protecting against neuronal cell death induced by glutamate in vitro and cerebral ischemia in vivo. However, its other biological functions remain unclear. This study aims to investigate whether B355252 suppresses neuroinflammatory responses and cell death in the brain. C57BL/6j mice were intraperitoneally injected with a single dosage of lipopolysaccharide (LPS, 1 mg/kg) to induce inflammation. B355252 (1 mg/kg) intervention was started two days prior to the LPS injection. The animal behavioral changes were assessed pre- and post-LPS injections. The animal brains were harvested at 4 and 24 h post-LPS injection, and histological, biochemical, and cytokine array outcomes were examined. Results showed that B355252 improved LPS-induced behavioral deterioration, mitigated brain tissue damage, and suppressed the activation of microglial and astrocytes. Furthermore, B355252 reduced the protein levels of key pyroptotic markers TLR4, NLRP3, and caspase-1 and inhibited the LPS-induced increases in IL-1β, IL-18, and cytokines. In conclusion, B355252 demonstrates a potent anti-neuroinflammatory effect in vivo, suggesting that its potential therapeutic value warrants further investigation.
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Affiliation(s)
- Qingping He
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), College of Health and Sciences, North Carolina Central University, Durham, NC 27707, USA; (Q.H.); (G.C.I.)
| | - Qi Qi
- Human Vaccine Institute, Department of Surgery, Duke University Medical Center, Durham, NC 27707, USA;
| | - Gordon C. Ibeanu
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), College of Health and Sciences, North Carolina Central University, Durham, NC 27707, USA; (Q.H.); (G.C.I.)
| | - P. Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), College of Health and Sciences, North Carolina Central University, Durham, NC 27707, USA; (Q.H.); (G.C.I.)
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2
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Biswas P, More SS. Using Small Molecules for Targeting Heavy Metals in Neurotoxicity and Neuroinflammation. Methods Mol Biol 2024; 2761:135-148. [PMID: 38427235 DOI: 10.1007/978-1-0716-3662-6_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Pharmaceutical drugs, natural toxins, industrial chemicals, and various environmental toxins negatively impact the nervous system. A significant cause of many neurodegenerative diseases is neurotoxicity. Although trace amounts of heavy metals are required for the proper functioning of several metabolic pathways, their dysregulation can cause many cellular and molecular alterations, which can enhance the risks associated with several neurodegenerative diseases. For example, high levels of heavy metals like manganese (Mn) affect the central nervous system with implications in both higher-order cognitive and motor functions. In addition, the buildup of amyloid aggregates and metal ions in the brain of patients with Alzheimer's disease is associated with disease pathogenesis. Small molecules capable of targeting neuroinflammation and neuroprotection pathways would be valuable to elucidate the pathological pathways associated with metal toxicity in neurogenerative disease. This chapter will summarize the necessary steps involved in (1) culturing of cell lines and maintenance of animal models, (2) design and preparation of samples of small molecules and treatment methodologies, (3) RNA and protein isolation and preparation of tissue and cell culture samples for quantitative studies, and (4) quantitative estimation of cellular products.
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Affiliation(s)
- Pronama Biswas
- School of Basic and Applied Sciences, Dayananda Sagar University, Bangalore, Karnataka, India
| | - Sunil S More
- School of Basic and Applied Sciences, Dayananda Sagar University, Bangalore, Karnataka, India
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3
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Huan Y, Hao G, Shi Z, Liang Y, Dong Y, Quan H. The role of dynamin-related protein 1 in cerebral ischemia/hypoxia injury. Biomed Pharmacother 2023; 165:115247. [PMID: 37516018 DOI: 10.1016/j.biopha.2023.115247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/18/2023] [Accepted: 07/25/2023] [Indexed: 07/31/2023] Open
Abstract
Mitochondrial dysfunction, especially in terms of mitochondrial dynamics, has been reported to be closely associated with neuronal outcomes and neurological impairment in cerebral ischemia/hypoxia injury. Dynamin-related protein 1 (Drp1) is a cytoplasmic GTPase that mediates mitochondrial fission and participates in neuronal cell death, calcium signaling, and oxidative stress. The neuroprotective role of Drp1 inhibition has been confirmed in several central nervous system disease models, demonstrating that targeting Drp1 may shed light on novel approaches for the treatment of cerebral ischemia/hypoxia injury. In this review, we aimed to highlight the roles of Drp1 in programmed cell death, oxidative stress, mitophagy, and mitochondrial function to provide a better understanding of mitochondrial disturbances in cerebral ischemia/hypoxia injury, and we also summarize the advances in novel chemical compounds targeting Drp1 to provide new insights into potential therapies for cerebral ischemia/hypoxia injury.
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Affiliation(s)
- Yu Huan
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenyang, China
| | - Guangzhi Hao
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenyang, China
| | - Zuolin Shi
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenyang, China
| | - Yong Liang
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenyang, China
| | - Yushu Dong
- Department of Neurosurgery, General Hospital of Northern Theater Command, Shenyang, China.
| | - Huilin Quan
- Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang, China.
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4
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Intertwined Relation between the Endoplasmic Reticulum and Mitochondria in Ischemic Stroke. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:3335887. [PMID: 35528523 PMCID: PMC9072026 DOI: 10.1155/2022/3335887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 03/19/2022] [Accepted: 03/31/2022] [Indexed: 01/01/2023]
Abstract
In ischemic stroke (IS), accumulation of the misfolded proteins in the endoplasmic reticulum (ER) and mitochondria-induced oxidative stress (OS) has been identified as the indispensable inducers of secondary brain injury. With the increasing recognition of an association between ER stress and OS with ischemic stroke and with the improved understanding of the underlying molecular mechanism, novel targets for drug therapy and new strategies for therapeutic interventions are surfacing. This review discusses the molecular mechanism underlying ER stress and OS response as both causes and consequences of ischemic stroke. We also summarize the latest advances in understanding the importance of ER stress and OS in the pathogenesis of ischemic stroke and discuss potential strategies and clinical trials explicitly aiming to restore mitochondria and ER dynamics after IS.
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The Role of Mitochondrial Dynamin in Stroke. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:2504798. [PMID: 35571256 PMCID: PMC9106451 DOI: 10.1155/2022/2504798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 04/17/2022] [Indexed: 11/25/2022]
Abstract
Stroke is one of the leading causes of death and disability in the world. However, the pathophysiological process of stroke is still not fully clarified. Mitochondria play an important role in promoting nerve survival and are an important drug target for the treatment of stroke. Mitochondrial dysfunction is one of the hallmarks of stroke. Mitochondria are in a state of continuous fission and fusion, which are termed as mitochondrial dynamics. Mitochondrial dynamics are very important for maintaining various functions of mitochondria. In this review, we will introduce the structure and functions of mitochondrial fission and fusion related proteins and discuss their role in the pathophysiologic process of stroke. A better understanding of mitochondrial dynamin in stroke will pave way for the development of new therapeutic options.
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6
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Gómez-Arnaiz S, Tate RJ, Grant MH. Cobalt Neurotoxicity: Transcriptional Effect of Elevated Cobalt Blood Levels in the Rodent Brain. TOXICS 2022; 10:toxics10020059. [PMID: 35202246 PMCID: PMC8878729 DOI: 10.3390/toxics10020059] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 12/11/2022]
Abstract
Metal-on-metal (MoM) hip implants made of cobalt chromium (CoCr) alloy have shown early failure compared with other bearing materials. A consequence of the abnormal wear produced by these prostheses is elevated levels of cobalt in the blood of patients, which can lead to systemic conditions involving cardiac and neurological symptoms. In order to better understand the implications for patients with these implants, we carried out metal content and RNA-Seq analysis of excised tissue from rats treated intraperitonially for 28 days with low concentrations of cobalt. Cobalt blood levels in dosed rats were found to be similar to those seen in some patients with MoM implants (range: 4–38 μg/L Co in blood). Significant accumulation of cobalt was measured in a range of tissues including kidney, liver, and heart, but also in brain tissue. RNA-Seq analysis of neural tissue revealed that exposure to cobalt induces a transcriptional response in the prefrontal cortex (pref. cortex), cerebellum, and hippocampus. Many of the most up- and downregulated genes appear to correspond to choroid plexus transcripts. These results indicate that the choroid plexus could be the brain tissue most affected by cobalt. More specifically, the differentially expressed genes show a disruption of steroidogenesis and lipid metabolism. Several other transcripts also demonstrate that cobalt induces an immune response. In summary, cobalt exposure induces alterations in the brain transcriptome, more specifically, the choroid plexus, which is in direct contact with neurotoxicants at the blood–cerebrospinal fluid barrier.
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Affiliation(s)
- Sara Gómez-Arnaiz
- Wolfson Centre, Biomedical Engineering Department, University of Strathclyde, Glasgow G4 0NW, UK;
| | - Rothwelle J. Tate
- Strathclyde Institute for Pharmacy & Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, UK;
| | - Mary Helen Grant
- Wolfson Centre, Biomedical Engineering Department, University of Strathclyde, Glasgow G4 0NW, UK;
- Correspondence:
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Pokharel S, Gliyazova NS, Dandepally SR, Williams AL, Ibeanu GC. Neuroprotective effects of an in vitro BBB permeable phenoxythiophene sulfonamide small molecule in glutamate-induced oxidative injury. Exp Ther Med 2022; 23:79. [PMID: 34938365 PMCID: PMC8688931 DOI: 10.3892/etm.2021.11002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 10/18/2021] [Indexed: 12/16/2022] Open
Abstract
Reactive oxygen species (ROS) play a central role in oxidative stress-associated neuronal cell death during ischemia. Further investigation into the inhibition of excessive ROS generation post-stroke is urgently required for the treatment of ischemic stroke. In the present study, the neuroprotective properties of the blood-brain barrier (BBB) penetrant B355227 were investigated. B355227 is a chemical analogue of B355252, and the role of the phenoxythiophene sulfonamide compound B355227 was further investigated in a glutamate-induced oxidative injury model. An in vitro model of the BBB was established in the immortalized mouse brain capillary endothelial cell line, bEnd.3. Formation of barrier in Transwell inserts was confirmed using EVOM resistance meter and Caffeine, Imatinib and Axitinib were used to validate the efficacy of the model. The validated BBB assay in combination with high performance liquid chromatography were used to analyse and verify the permeability of B355227 through the barrier. The integrity of the cell junctions after the BBB assays were confirmed using immunofluorescence to visualize the expression of the barrier junction protein zonula occludens-1. Cell survival was measured with Resazurin, a redox indicator dye, in HT22, a hippocampal neuronal cell treated with 5 mM glutamate or co-treated with the B355227 recovered from the BBB permeability experiment. Changes in glutathione levels were detected using a glutathione detection kit, while analyses of ROS, calcium (Ca2+), and mitochondrial membrane potential (MMP) were accomplished with the fluorescent dyes 2',7'-dichlorofluorescein diacetate, Fura-2 AM and MitoTracker Red dyes, respectively. Immunoblotting was also performed to detect the expression and activation of Erk1/2, p-38, JNK, Bax and Bcl-2. The results of the present study demonstrated that B355227 crossed the BBB in vitro and protected HT22 from oxidative injury induced by glutamate exposure. Treatment of cells with B355227 blocked the glutamate-dependent depletion of intracellular glutathione and significantly reduced ROS production. Increased Ca2+ influx and subsequent collapse of the MMP was attenuated by B355227. Furthermore, the results of the present study demonstrated that B355227 protected against oxidative stress via the MAPK pathway, by increasing the activation of Erk1/2, JNK and P38, and restoring anti-apoptotic Bcl-2. Collectively, the results of the present study indicate that B355227 has potent antioxidant and neuroprotective attributes in glutamate-induced neuronal cell death. Further investigation into the role of B355227 in the modulation of glutamate-dependent oxidative stress is required.
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Affiliation(s)
- Smritee Pokharel
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA
| | - Nailya S. Gliyazova
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA
| | - Srinivasa R. Dandepally
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA
| | - Alfred L. Williams
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA
- Department of Pharmaceutical Science, North Carolina Central University, Durham, NC 27707, USA
| | - Gordon C. Ibeanu
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA
- Department of Pharmaceutical Science, North Carolina Central University, Durham, NC 27707, USA
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8
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Ma Y, Qi Q, He Q, Gilyazova NS, Ibeanu G, Li PA. Neuroprotection by B355252 against Glutamate-Induced Cytotoxicity in Murine Hippocampal HT-22 Cells Is Associated with Activation of ERK3 Signaling Pathway. Biol Pharm Bull 2021; 44:1662-1669. [PMID: 34719643 DOI: 10.1248/bpb.b21-00158] [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: 11/22/2022]
Abstract
Glutamate differentially affects the levels extracellular signal-regulated kinase (ERK)1/2 and ERK3 and the protective effect of B355252, an aryl thiophene compound, 4-chloro-N-(naphthalen-1-ylmethyl)-5-(3-(piperazin-1-yl)phenoxy)thiophene-2-sulfonamide, is associated with suppression of ERK1/2. The objectives of this study were to further investigate the impact of B355252 on ERK3 and its downstream signaling pathways affected by glutamate exposure in the mouse hippocampal HT-22 neuronal cells. Murine hippocampal HT22 cells were incubated with glutamate and treated with B355252. Cell viability was assessed, protein levels of pERK3, ERK3, mitogen-activated protein kinase-activated protein kinase-5 (MAPKAPK-5), steroid receptor coactivator 3 (SRC-3), p-S6 and S6 were measured using Western blotting, and immunoreactivity of p-S6 was determined by immunocytochemistry. The results reveal that glutamate markedly diminished the protein levels of p-ERK3 and its downstream targets MK-5 and SRC-3 and increased p-S6, an indicator for mechanistic target of rapamycin (mTOR) activation. Conversely, treatment with B355252 protected the cells from glutamate-induced damage and prevented the glutamate-caused declines of p-ERK3, MK-5 and SRC-3 and increase of p-S6. Our study demonstrates that one of the mechanisms that glutamate mediates its cytotoxicity is through suppression of ERK3 and that B355252 rescues the cells from glutamate toxicity by reverting ERK3 level.
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Affiliation(s)
- Yanni Ma
- Institute of Clinical Pharmacology, Department of Pharmacy, General Hospital of Ningxia Medical University.,Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), College of Health and Sciences, North Carolina Central University
| | - Qi Qi
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), College of Health and Sciences, North Carolina Central University.,The Julis Chambers Biomedical Biotechnology Research Institute (BBRI), North Carolina Central University
| | - Qingping He
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), College of Health and Sciences, North Carolina Central University
| | - Nailya S Gilyazova
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), College of Health and Sciences, North Carolina Central University
| | - Gordon Ibeanu
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), College of Health and Sciences, North Carolina Central University
| | - P Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), College of Health and Sciences, North Carolina Central University
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9
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Ahluwalia M, Kumar M, Ahluwalia P, Rahimi S, Vender JR, Raju RP, Hess DC, Baban B, Vale FL, Dhandapani KM, Vaibhav K. Rescuing mitochondria in traumatic brain injury and intracerebral hemorrhages - A potential therapeutic approach. Neurochem Int 2021; 150:105192. [PMID: 34560175 PMCID: PMC8542401 DOI: 10.1016/j.neuint.2021.105192] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/18/2021] [Accepted: 09/20/2021] [Indexed: 02/07/2023]
Abstract
Mitochondria are dynamic organelles responsible for cellular energy production. Besides, regulating energy homeostasis, mitochondria are responsible for calcium homeostasis, signal transmission, and the fate of cellular survival in case of injury and pathologies. Accumulating reports have suggested multiple roles of mitochondria in neuropathologies, neurodegeneration, and immune activation under physiological and pathological conditions. Mitochondrial dysfunction, which occurs at the initial phase of brain injury, involves oxidative stress, inflammation, deficits in mitochondrial bioenergetics, biogenesis, transport, and autophagy. Thus, development of targeted therapeutics to protect mitochondria may improve functional outcomes following traumatic brain injury (TBI) and intracerebral hemorrhages (ICH). In this review, we summarize mitochondrial dysfunction related to TBI and ICH, including the mechanisms involved, and discuss therapeutic approaches with special emphasis on past and current clinical trials.
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Affiliation(s)
- Meenakshi Ahluwalia
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, USA.
| | - Manish Kumar
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Pankaj Ahluwalia
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Scott Rahimi
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - John R Vender
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Raghavan P Raju
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - David C Hess
- Department of Neurology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Babak Baban
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, USA
| | - Fernando L Vale
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Krishnan M Dhandapani
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Kumar Vaibhav
- Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, USA; Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, GA, USA.
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10
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Hu Y, Wu L, Yang SQ, Wei HJ, Wang CY, Kang X, Jiang JM, Zhang P, Tang XQ. Formaldehyde induces ferritinophagy to damage hippocampal neuronal cells. Toxicol Ind Health 2021; 37:685-694. [PMID: 34644200 DOI: 10.1177/07482337211048582] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Formaldehyde (FA) causes neurotoxicity and contributes to the occurrence of neurodegenerative diseases. However, the mechanism of FA-induced neurotoxicity has not been fully elucidated. Ferritinophagy, an autophagy process of ferritin mediated by the nuclear receptor coactivator 4 (NCOA4), is a potential mechanism of neurotoxicity. In this study, we explored whether ferritinophagy is associated with the neurotoxicity of FA. Our results showed that FA (50, 100, 200 μM; 24 h) exposure upregulated ferritinophagy in the mouse hippocampal neuronal HT22 cells, which was evidenced by the upregulated autophagic flux, the increased colocalizations of NCOA4 with ferritin heavy chain (FTH1) and NCOA4 with microtubule-associated protein 1 light chain-3B (LC3B), the augmented expression of NCOA4, and the reduced content of FTH1. We also found that FA (0.1, 1, and 10 μmol, i.c.v., 7d) administration boosted ferritinophagy in the hippocampus of Sprague-Dawley (SD) rats, which was demonstrated by the accumulated autophagosomes, the increased expressions of LC3II/I and NCOA4, and the decreased contents of p62 and FTH1 in the hippocampus. Further, we confirmed that inhibition of ferritinophagy by silencing the expression of NCOA4 decreased FA-induced toxic damage in HT22 cells. These results indicated that FA induces neurotoxicity by promoting ferritinophagy. Our findings suggest a potential mechanism insight into the FA-induced neurotoxicity, which in turn provides a new thought for the treatment of FA-related neurodegenerative diseases.
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Affiliation(s)
- Yu Hu
- The First Affiliated Hospital, Institute of Neurology, Hengyang Medical School, 574417University of South China, Hengyang, P. R. China
| | - Lei Wu
- The First Affiliated Hospital, Institute of Neurology, Hengyang Medical School, 574417University of South China, Hengyang, P. R. China
| | - San-Qiao Yang
- The First Affiliated Hospital, Institute of Neurology, Hengyang Medical School, 574417University of South China, Hengyang, P. R. China.,Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical School, University of South China, Hengyang, Hunan, P. R. China
| | - Hai-Jun Wei
- Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical School, University of South China, Hengyang, Hunan, P. R. China
| | - Chun-Yan Wang
- Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical School, University of South China, Hengyang, Hunan, P. R. China
| | - Xuan Kang
- The First Affiliated Hospital, Institute of Neurology, Hengyang Medical School, 574417University of South China, Hengyang, P. R. China
| | - Jia-Mei Jiang
- The First Affiliated Hospital, Institute of Neurology, Hengyang Medical School, 574417University of South China, Hengyang, P. R. China
| | - Ping Zhang
- The Affiliated Nanhua Hospital, Department of Neurology, Hengyang Medical School, University of South China, Hengyang, Hunan, P. R. China
| | - Xiao-Qing Tang
- The First Affiliated Hospital, Institute of Neurology, Hengyang Medical School, 574417University of South China, Hengyang, P. R. China
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11
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Zhou X, Chen H, Wang L, Lenahan C, Lian L, Ou Y, He Y. Mitochondrial Dynamics: A Potential Therapeutic Target for Ischemic Stroke. Front Aging Neurosci 2021; 13:721428. [PMID: 34557086 PMCID: PMC8452989 DOI: 10.3389/fnagi.2021.721428] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 08/16/2021] [Indexed: 12/13/2022] Open
Abstract
Stroke is one of the leading causes of death and disability worldwide. Brain injury after ischemic stroke involves multiple pathophysiological mechanisms, such as oxidative stress, mitochondrial dysfunction, excitotoxicity, calcium overload, neuroinflammation, neuronal apoptosis, and blood-brain barrier (BBB) disruption. All of these factors are associated with dysfunctional energy metabolism after stroke. Mitochondria are organelles that provide adenosine triphosphate (ATP) to the cell through oxidative phosphorylation. Mitochondrial dynamics means that the mitochondria are constantly changing and that they maintain the normal physiological functions of the cell through continuous division and fusion. Mitochondrial dynamics are closely associated with various pathophysiological mechanisms of post-stroke brain injury. In this review, we will discuss the role of the molecular mechanisms of mitochondrial dynamics in energy metabolism after ischemic stroke, as well as new strategies to restore energy homeostasis and neural function. Through this, we hope to uncover new therapeutic targets for the treatment of ischemic stroke.
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Affiliation(s)
- Xiangyue Zhou
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hanmin Chen
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ling Wang
- Department of Operating Room, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Cameron Lenahan
- Department of Biomedical Sciences, Burrell College of Osteopathic Medicine, Las Cruces, NM, United States
| | - Lifei Lian
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yibo Ou
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue He
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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12
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Zhu Q, Liao S, Lu X, Shi S, Gong D, Cheang I, Zhu X, Zhang H, Li X. Cobalt exposure in relation to cardiovascular disease in the United States general population. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:41834-41842. [PMID: 33786770 DOI: 10.1007/s11356-021-13620-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
Cobalt exposure has adverse health effects on the cardiovascular system in occupational and laboratory studies, but these effects have not been assessed in the general population. We aimed to determine whether serum cobalt levels had relationship with the prevalence of cardiovascular disease (CVD) in the general population. Using data from the National Health and Nutrition Examination Survey (NHANES) (2015-2016), we performed the cross-sectional study. We analyzed the baseline characteristics of 3389 participants (1623 men and 1766 women). Generalized linear models and restricted cubic spline plots curve were undertaken to elucidate the relationship. Stratified subgroup analysis was tested to exclude interaction between different variates and cobalt. Our results showed that the adjusted odds ratios (ORs) with 95% confidence intervals (CIs) for CVD prevalence across the quartiles of cobalt were 0.94 (0.67, 1.30), 1.55 (1.15, 2.10), and 1.74 (1.28, 2.35) compared with lowest quartile. The restricted cubic spline curve also suggested nonlinear and positive association between cobalt and CVD (P for nonlinearity = 0.007). In summary, our cross-sectional results verify that higher cobalt levels are associated with a higher prevalence of cardiovascular disease.
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Affiliation(s)
- Qingqing Zhu
- Department of Cardiology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, 210029, China
| | - Shengen Liao
- Department of Cardiology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, 210029, China
| | - Xinyi Lu
- Department of Cardiology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, 210029, China
| | - Shi Shi
- Department of Cardiology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, 210029, China
| | - Dexing Gong
- Institute of Public Health, Guangdong Center for Disease Control and Prevention, Guangzhou, 510000, China
| | - Iokfai Cheang
- Department of Cardiology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, 210029, China
| | - Xu Zhu
- Department of Cardiology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, 210029, China
| | - Haifeng Zhang
- Department of Cardiology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, 210029, China
| | - Xinli Li
- Department of Cardiology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, 210029, China.
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Wang HK, Chen JS, Hsu CY, Su YT, Sung TC, Liang CL, Kwan AL, Wu CC. A Novel NGF Receptor Agonist B355252 Ameliorates Neuronal Loss and Inflammatory Responses in a Rat Model of Cerebral Ischemia. J Inflamm Res 2021; 14:2363-2376. [PMID: 34103967 PMCID: PMC8179829 DOI: 10.2147/jir.s303833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 05/13/2021] [Indexed: 01/19/2023] Open
Abstract
Introduction Cerebral ischemia is a leading cause of disability and death worldwide. However, an effective therapeutic approach for the condition remains undiscovered. The previously proposed growth factor-based therapy has been inefficient due to its inability to pass through the blood–brain barrier. B355252, a newly developed small molecule, exhibited a potential neuroprotective effect in vivo. However, its exact efficacy in cerebral ischemia remains unclear. Methods We adopt an endothelin-1 stereotaxic intracranial injection to induced cerebral ischemia in rat. We further conducted 2,3,5-triphenyltetrazolium chloride (TTC) staining, immunofluorescent staining, enzyme-linked immunosorbent assay (ELISA), and behavioral tests to evaluate the efficacy of B355252 in neuroprotection, anti-inflammation, and behavioral outcome improvements. Results We identified that B355252 could protect ischemic neurons from neuronal loss by attenuating DNA damage, reducing ROS production and the LDH level, and preventing neuronal apoptosis. Moreover, inflammatory responses in astrocytic and microglial gliosis, as well as IL-1β and TNF-α levels, were ameliorated. Consequently, the behavioral outcomes of ischemic rats in neurologic responses and fore paw function recovery were improved. Discussion Overall, our study verified the in vivo therapeutic potential of B355252. The study findings further support its application in the development of a therapeutic approach for stroke.
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Affiliation(s)
- Hao-Kuang Wang
- Department of Neurosurgery, E-DA Hospital, I-Shou University, Kaohsiung, Taiwan.,School of Medicine for International Students, College of Medicine, I-Shou University, Kaohsiung, Taiwan
| | - Jui-Sheng Chen
- Department of Neurosurgery, E-DA Hospital, I-Shou University, Kaohsiung, Taiwan.,Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Neurosurgery, E-Da Dachang Hospital, I-Shou University, Kaohsiung, Taiwan
| | - Chien-Yu Hsu
- Department of Neurosurgery, E-DA Hospital, I-Shou University, Kaohsiung, Taiwan
| | - Yu-Ting Su
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Tzu-Ching Sung
- School of Medicine for International Students, College of Medicine, I-Shou University, Kaohsiung, Taiwan
| | - Cheng-Loong Liang
- Department of Neurosurgery, E-DA Hospital, I-Shou University, Kaohsiung, Taiwan.,School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan
| | - Aij-Lie Kwan
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Neurosurgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Cheng-Chun Wu
- School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan
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14
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Chen W, Guo C, Feng H, Chen Y. Mitochondria: Novel Mechanisms and Therapeutic Targets for Secondary Brain Injury After Intracerebral Hemorrhage. Front Aging Neurosci 2021; 12:615451. [PMID: 33584246 PMCID: PMC7873050 DOI: 10.3389/fnagi.2020.615451] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 12/28/2020] [Indexed: 12/19/2022] Open
Abstract
Intracerebral hemorrhage (ICH) is a destructive form of stroke that often results in death or disability. However, the survivors usually experience sequelae of neurological impairments and psychiatric disorders, which affect their daily functionality and working capacity. The recent MISTIE III and STICH II trials have confirmed that early surgical clearance of hematomas does not improve the prognosis of survivors of ICH, so it is vital to find the intervention target of secondary brain injury (SBI) after ICH. Mitochondrial dysfunction, which may be induced by oxidative stress, neuroinflammation, and autophagy, among others, is considered to be a novel pathological mechanism of ICH. Moreover, mitochondria play an important role in promoting neuronal survival and improving neurological function after a hemorrhagic stroke. This review summarizes the mitochondrial mechanism involved in cell death, reactive oxygen species (ROS) production, inflammatory activation, blood–brain barrier (BBB) disruption, and brain edema underlying ICH. We emphasize the potential of mitochondrial protection as a potential therapeutic target for SBI after stroke and provide valuable insight into clinical strategies.
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Affiliation(s)
- Weixiang Chen
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,State Key Laboratory of Trauma, Burn and Combined Injury, Third Military Medical University (Army Medical University), Chongqing, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Third Military Medical University (Army Medical University), Chongqing, China.,Collaborative Innovation Center for Brain Science, Third Military Medical University (Army Medical University), Chongqing, China
| | - Chao Guo
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,State Key Laboratory of Trauma, Burn and Combined Injury, Third Military Medical University (Army Medical University), Chongqing, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Third Military Medical University (Army Medical University), Chongqing, China.,Collaborative Innovation Center for Brain Science, Third Military Medical University (Army Medical University), Chongqing, China
| | - Hua Feng
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,State Key Laboratory of Trauma, Burn and Combined Injury, Third Military Medical University (Army Medical University), Chongqing, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Third Military Medical University (Army Medical University), Chongqing, China.,Collaborative Innovation Center for Brain Science, Third Military Medical University (Army Medical University), Chongqing, China
| | - Yujie Chen
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,State Key Laboratory of Trauma, Burn and Combined Injury, Third Military Medical University (Army Medical University), Chongqing, China.,Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Third Military Medical University (Army Medical University), Chongqing, China.,Collaborative Innovation Center for Brain Science, Third Military Medical University (Army Medical University), Chongqing, China
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15
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Zhou HY, Jiang F, Cao Z, Shen QY, Feng YJ, Hou ZH. Propofol protects PC12 cells from cobalt chloride-induced injury by mediating miR-134. Histol Histopathol 2021; 36:425-435. [PMID: 33410125 DOI: 10.14670/hh-18-298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Propofol (PRO) was reported to exert a neuroprotective effect by decreasing microRNA-134 (miR-134), a brain-specific miRNA, thus, the role of PRO against cobalt chloride (CoCl₂)-induced injury in rat pheochromocytoma cells (PC12) via mediating miR-134 was explored. METHODS CoCl₂-induced PC12 cells treated with PRO were transfected with or without miR-134 negative control (NC)/ inhibitor/mimic, and the following detections were then performed using cell counting kit-8 (CCK-8), Annexin V-fluorescein isothiocyanate/propidium iodide (Annexin V-FITC/PI) and Hoechst 33258 staining. Autophagy was observed by transmission electron microscope (TEM). Mitochondrial membrane potential (MMP) was detected by Rhodamine-123 (Rh123) staining, and reactive oxygen species (ROS) by dichloro-dihydro-fluorescein diacetate (DCFH-DA) staining. Protein and gene expressions were measured by Western blotting and quantitative reverse transcriptase polymerase chain reaction (qRT-PCR), respectively. RESULTS PRO reversed the CoCl₂-induced decrease in the PC12 cell viability and increased miR-134 in a dose-dependent manner. CoCl₂ increased LC3II/I ratio and Beclin-1 expression, but decreased p62 expression, which was abolished by PRO. In addition, an increased cell apoptosis rates triggered by CoCl₂ were reduced by PRO with the down-regulations of Bax and Caspase-3 and the up-regulation of Bcl-2. Furthermore, PRO decreased methylenedioxyamphetamine (MDA), nitric oxide (NO) and ROS in CoCl₂-induced PC12 cells accompanying the increase in glutathione peroxidase (GSH-Px) and MMP. The effects of PRO on autophagy, apoptosis and oxidative stress in CoCl₂-induced PC12 cell were reversed by miR-134 mimic. CONCLUSION PRO may mitigate CoCl₂-induced autophagy in PC12 cells with decreased apoptosis and improved oxidative stress via mediating miR-134.
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Affiliation(s)
- Hong-Yi Zhou
- Department of Anesthesiology, Tongzhou Maternal and Child Health Hospital of Beijing, Beijing, China.
| | - Fan Jiang
- Department of General Medicine, Beijing Luhe Hospital, Capital Medical University, Beijing, China
| | - Zhong Cao
- Department of Anesthesiology, Tongzhou Maternal and Child Health Hospital of Beijing, Beijing, China
| | - Qi-Yun Shen
- Department of Anesthesiology, Tongzhou Maternal and Child Health Hospital of Beijing, Beijing, China
| | - Yu-Jing Feng
- Department of Anesthesiology, Tongzhou Maternal and Child Health Hospital of Beijing, Beijing, China
| | - Zhen-Huan Hou
- Department of Anesthesiology, Tongzhou Maternal and Child Health Hospital of Beijing, Beijing, China
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16
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da Cruz RMD, Braga RM, de Andrade HHN, Monteiro ÁB, Luna IS, da Cruz RMD, Scotti MT, Mendonça-Junior FJB, de Almeida RN. RMD86, a thiophene derivative, promotes antinociceptive and antipyretic activities in mice. Heliyon 2020; 6:e05520. [PMID: 33294672 PMCID: PMC7695913 DOI: 10.1016/j.heliyon.2020.e05520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/28/2020] [Accepted: 11/11/2020] [Indexed: 12/29/2022] Open
Abstract
Treatment of pain and fever remains an important challenge for modern medicine. Non-steroidal anti-inflammatory drugs (NSAIDs) are the pharmacological options most often used, but their frequent use exposes the patient to serious side effects and dangerous drug interactions. In this context, thiophene derivatives are promising therapeutic alternatives. In this study, we evaluated the in vivo and in silico antinociceptive and antipyretic properties of RMD86, a thiophene derivative. At 100 mg/kg, RMD86 induced no significant changes in the motor coordination of mice in the Rotarod test. At 25, 50, and 100 mg/kg RMD86 significantly reduced the number of abdominal contortions induced by acetic acid (antinociceptive activity) in mice when compared to the control. In the formalin test, for the first phase, there was a reduction in licking times at doses of 50 and 100 mg/kg. In the second phase, reduction occurred at all doses. In the hot plate test, RMD86 (at 100 mg/kg) increased latency time in the first 30 min. For antipyretic activity, RMD86, when compared to the reference drug acetaminophen (250 mg/kg), significantly reduced pyrexia at 30, 60, and 120 min, at dosages of 25, 50 and 100 mg/kg. Molecular docking studies revealed that RMD86 presents a greater number of interactions and lower energy values than both the co-crystallized ligand and the reference drug (meloxicam) against COX-1 and COX-2 isoenzymes. The results give evidence of the analgesic and antipyretic properties like NSAIDs suggesting its potential for pain therapy.
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Affiliation(s)
- Ryldene Marques Duarte da Cruz
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
| | - Renan Marinho Braga
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
| | - Humberto Hugo Nunes de Andrade
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
| | - Álefe Brito Monteiro
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
| | - Isadora Silva Luna
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
| | - Rayssa Marques Duarte da Cruz
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
- Laboratory of Synthesis and Drug Delivery, State University of Paraiba, João Pessoa, PB 58071-160, Brazil
| | - Marcus Tullius Scotti
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
| | - Francisco Jaime Bezerra Mendonça-Junior
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
- Laboratory of Synthesis and Drug Delivery, State University of Paraiba, João Pessoa, PB 58071-160, Brazil
| | - Reinaldo Nóbrega de Almeida
- Post-Graduation Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil
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17
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Gómez-Arnaiz S, Tate R, Grant M. Cytotoxicity of cobalt chloride in brain cell lines - a comparison between astrocytoma and neuroblastoma cells. Toxicol In Vitro 2020; 68:104958. [DOI: 10.1016/j.tiv.2020.104958] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/15/2020] [Accepted: 07/27/2020] [Indexed: 12/17/2022]
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18
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Back to The Fusion: Mitofusin-2 in Alzheimer's Disease. J Clin Med 2020; 9:jcm9010126. [PMID: 31906578 PMCID: PMC7019958 DOI: 10.3390/jcm9010126] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/27/2019] [Accepted: 12/31/2019] [Indexed: 01/08/2023] Open
Abstract
Mitochondria are dynamic organelles that undergo constant fission and fusion. Mitochondria dysfunction underlies several human disorders, including Alzheimer’s disease (AD). Preservation of mitochondrial dynamics is fundamental for regulating the organelle’s functions. Several proteins participate in the regulation of mitochondrial morphology and networks, and among these, Mitofusin 2 (Mfn2) has been extensively studied. This review focuses on the role of Mfn2 in mitochondrial dynamics and in the crosstalk between mitochondria and the endoplasmic reticulum, in particular in AD. Understanding how this protein may be related to AD pathogenesis will provide essential information for the development of therapies for diseases linked to disturbed mitochondrial dynamics, as in AD.
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19
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Zimmerman MA, Wilkison S, Qi Q, Chen G, Li PA. Mitochondrial dysfunction contributes to Rapamycin-induced apoptosis of Human Glioblastoma Cells - A synergistic effect with Temozolomide. Int J Med Sci 2020; 17:2831-2843. [PMID: 33162811 PMCID: PMC7645350 DOI: 10.7150/ijms.40159] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 01/03/2020] [Indexed: 12/22/2022] Open
Abstract
Mammalian target of rapamycin (mTOR) is upregulated in a high percentage of glioblastomas. While a well-known mTOR inhibitor, rapamycin, has been shown to reduce glioblastoma survival, the role of mitochondria in achieving this therapeutic effect is less well known. Here, we examined mitochondrial dysfunction mechanisms that occur with the suppression of mTOR signaling. We found that, along with increased apoptosis, and a reduction in transformative potential, rapamycin treatment significantly affected mitochondrial health. Specifically, increased production of reactive oxygen species (ROS), depolarization of the mitochondrial membrane potential (MMP), and altered mitochondrial dynamics were observed. Furthermore, we verified the therapeutic potential of rapamycin-induced mitochondrial dysfunction through co-treatment with temzolomide (TMZ), the current standard of care for glioblastoma. Together these results demonstrate that the mitochondria remain a promising target for therapeutic intervention against human glioblastoma and that TMZ and rapamycin have a synergistic effect in suppressing glioblastoma viability, enhancing ROS production, and depolarizing MMP.
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Affiliation(s)
- Mary A Zimmerman
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, 1801 Fayetteville St, Durham, NC, 27707, USA.,Department of Biology, University of Wisconsin-La Crosse, 1725 State St, La Crosse, WI, 54601, USA
| | - Samantha Wilkison
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, 1801 Fayetteville St, Durham, NC, 27707, USA.,Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, 27708, USA
| | - Qi Qi
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, 1801 Fayetteville St, Durham, NC, 27707, USA.,Department of Neurology, Neuroscience Center, General Hospital of Ningxia Medical University, and Key Laboratory of Craniocerebral Diseases of Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - Guisheng Chen
- Department of Neurology, Neuroscience Center, General Hospital of Ningxia Medical University, and Key Laboratory of Craniocerebral Diseases of Ningxia Hui Autonomous Region, Yinchuan 750004, China
| | - P Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, 1801 Fayetteville St, Durham, NC, 27707, USA
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20
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Mahneva O, Caplan SL, Ivko P, Dawson-Scully K, Milton SL. NO/cGMP/PKG activation protects Drosophila cells subjected to hypoxic stress. Comp Biochem Physiol C Toxicol Pharmacol 2019; 223:106-114. [PMID: 31150868 DOI: 10.1016/j.cbpc.2019.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 05/22/2019] [Accepted: 05/23/2019] [Indexed: 01/28/2023]
Abstract
The anoxia-tolerant fruit fly, Drosophila melanogaster, has routinely been used to examine cellular mechanisms responsible for anoxic and oxidative stress resistance. Nitric oxide (NO), an important cellular signaling molecule, and its downstream activation of cGMP-dependent protein kinase G (PKG) has been implicated as a protective mechanism against ischemic injury in diverse animal models from insects to mammals. In Drosophila, increased PKG signaling results in increased survival of animals exposed to anoxic stress. To determine if activation of the NO/cGMP/PKG pathway is protective at the cellular level, the present study employed a pharmacological protocol to mimic hypoxic injury in Drosophila S2 cells. The commonly used S2 cell line was derived from a primary culture of late stage (20-24 h old) Drosophila melanogaster embryos. Hypoxic stress was induced by exposure to either sodium azide (NaN3) or cobalt chloride (CoCl2). During chemical hypoxic stress, NO/cGMP/PKG activation protected against cell death and this mechanism involved modulation of downstream mitochondrial ATP-sensitive potassium ion channels (mitoKATP). The cellular protection afforded by NO/cGMP/PKG activation during ischemia-like stress may be an adaptive cytoprotective mechanism and modulation of this signaling cascade could serve as a potential therapeutic target for protection against hypoxia or ischemia-induced cellular injury.
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Affiliation(s)
- Olena Mahneva
- Department of Biological Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA.
| | - Stacee Lee Caplan
- Department of Biological Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA.
| | - Polina Ivko
- Department of Biological Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA.
| | - Ken Dawson-Scully
- Department of Biological Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA.
| | - Sarah L Milton
- Department of Biological Sciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA.
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21
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Nabavi SF, Sureda A, Sanches-Silva A, Pandima Devi K, Ahmed T, Shahid M, Sobarzo-Sánchez E, Dacrema M, Daglia M, Braidy N, Vacca RA, Berindan-Neagoe I, Gulei D, Barreca D, Banach M, Nabavi SM, Dehpour AR, Shirooie S. Novel therapeutic strategies for stroke: The role of autophagy. Crit Rev Clin Lab Sci 2019; 56:182-199. [PMID: 30821184 DOI: 10.1080/10408363.2019.1575333] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Autophagy is an important biological mechanism involved in the regulation of numerous fundamental cellular processes that are mainly associated with cellular growth and differentiation. Autophagic pathways are vital for maintaining cellular homeostasis by enhancing the turnover of nonfunctional proteins and organelles. Neuronal cells, like other eukaryotic cells, are dependent on autophagy for neuroprotection in response to stress, but can also induce cell death in cerebral ischemia. Recent studies have demonstrated that autophagy may induce neuroprotection following acute brain injury, including ischemic stroke. However in some special circumstances, activation of autophagy can induce cell death, playing a deleterious role in the etiology and progression of ischemic stroke. Currently, there are no therapeutic options against stroke that demonstrate efficient neuroprotective abilities. In the present work, we will review the significance of autophagy in the context of ischemic stroke by first outlining its role in ischemic neuronal death. We will also highlight the potential therapeutic applications of pharmacological modulators of autophagy, including some naturally occurring polyphenolic compounds that can target this catabolic process. Our findings provide renewed insight on the mechanism of action of autophagy in stroke together with potential neuroprotective compounds, which may partially exert their function through enhancing mitochondrial function and attenuating damaging autophagic processes.
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Affiliation(s)
- Seyed Fazel Nabavi
- a Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences , Tehran , Iran
| | - Antoni Sureda
- b Research Group on Community Nutrition and Oxidative Stress (NUCOX) and CIBEROBN (Physiopathology of Obesity and Nutrition CB12/03/30038), University of Balearic Islands , Palma de Mallorca , Spain
| | - Ana Sanches-Silva
- c National Institute for Agricultural and Veterinary Research (INIAV) , Vila do Conde , Portugal.,d Center for Study in Animal Science (CECA), ICETA, University of Oporto , Oporto , Portugal
| | - Kasi Pandima Devi
- e Department of Biotechnology , Alagappa University , Karaikudi , Tamil Nadu, India
| | - Touqeer Ahmed
- f Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology , Islamabad , Pakistan
| | - Momina Shahid
- f Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology , Islamabad , Pakistan
| | - Eduardo Sobarzo-Sánchez
- g Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Santiago de Compostela , Santiago de Compostela , Spain.,h Instituto de Investigación e Innovación en Salud, Facultad de Ciencias de la Salud , Universidad Central de Chile , Chile
| | - Marco Dacrema
- i Department of Drug Sciences , Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia , Pavia , Italy
| | - Maria Daglia
- i Department of Drug Sciences , Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia , Pavia , Italy
| | - Nady Braidy
- j Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales , New South Wales , Australia
| | - Rosa Anna Vacca
- k Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies National Council of Research , Bari , Italy
| | - Ioana Berindan-Neagoe
- l MEDFUTURE - Research Center for Advanced Medicine, "Iuliu-Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca , Romania.,m Research Center for Functional Genomics, Biomedicine and Translational Medicine, "Iuliu Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca , Romania.,n Department of Functional Genomics and Experimental Pathology , The Oncology Institute "Prof. Dr. Ion Chiricuta" , Cluj-Napoca , Romania
| | - Diana Gulei
- l MEDFUTURE - Research Center for Advanced Medicine, "Iuliu-Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca , Romania
| | - Davide Barreca
- o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences , University of Messina , Messina , Italy
| | - Maciej Banach
- p Department of Hypertension , WAM University Hospital in Lodz, Medical University of Lodz , Lodz , Poland.,q Polish Mother's Memorial Hospital Research Institute (PMMHRI) , Lodz , Poland.,r Cardiovascular Research Centre, University of Zielona Gora , Zielona Gora , Poland
| | - Seyed Mohammad Nabavi
- a Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences , Tehran , Iran
| | - Ahmad Reza Dehpour
- s Department of Pharmacology, Faculty of Medicine , Tehran University of Medical Sciences , Tehran , Iran.,t Experimental Medicine Research Center, Tehran University of Medical Sciences , Tehran , Iran
| | - Samira Shirooie
- u Department of Pharmacology, School of Pharmacy , Kermanshah University of Medical Sciences , Kermanshah , Iran
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22
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Zimmerman MA, Biggers CD, Li PA. Rapamycin treatment increases hippocampal cell viability in an mTOR-independent manner during exposure to hypoxia mimetic, cobalt chloride. BMC Neurosci 2018; 19:82. [PMID: 30594149 PMCID: PMC6310999 DOI: 10.1186/s12868-018-0482-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Cobalt chloride (CoCl2) induces chemical hypoxia through activation of hypoxia-inducible factor-1 alpha (HIF-1α). Mammalian target of rapamycin (mTOR) is a multifaceted protein capable of regulating cell growth, angiogenesis, metabolism, proliferation, and survival. In this study, we tested the efficacy of a well-known mTOR inhibitor, rapamycin, in reducing oxidative damage and increasing cell viability in the mouse hippocampal cell line, HT22, during a CoCl2-simulated hypoxic insult. RESULTS CoCl2 caused cell death in a dose-dependent manner and increased protein levels of cleaved caspase-9 and caspase-3. Rapamycin increased viability of HT22 cells exposed to CoCl2 and reduced activation of caspases-9 and -3. Cells exposed to CoCl2 displayed increased reactive oxygen species (ROS) production and hyperpolarization of the mitochondrial membrane, both of which rapamycin successfully blocked. mTOR protein itself, along with its downstream signaling target, phospho-S6 ribosomal protein (pS6), were significantly inhibited with CoCl2 and rapamycin addition did not significantly lower expression further. Rapamycin promoted protein expression of Beclin-1 and increased conversion of microtubule-associated protein light chain 3 (LC3)-I into LC3-II, suggesting an increase in autophagy. Pro-apoptotic protein, Bcl-2 associated × (Bax), exhibited a slight, but significant decrease with rapamycin treatment, while its anti-apoptotic counterpart, B cell lymphoma-2 (Bcl-2), was to a similar degree upregulated. Finally, the protein expression ratio of phosphorylated mitogen-activated protein kinase (pMAPK) to its unphosphorylated form (MAPK) was dramatically increased in rapamycin and CoCl2 co-treated cells. CONCLUSIONS Our results indicate that rapamycin confers protection against CoCl2-simulated hypoxic insults to neuronal cells. This occurs, as suggested by our results, independent of mTOR modification, and rather through stabilization of the mitochondrial membrane with concomitant decreases in ROS production. Additionally, inhibition of caspase-9 and -3 activation and stimulation of protective autophagy reduces cell death, while a decrease in the Bax/Bcl-2 ratio and an increase in pMAPK promotes cell survival during CoCl2 exposure. Together these results demonstrate the therapeutic potential of rapamycin against hypoxic injury and highlight potential pathways mediating the protective effects of rapamycin treatment.
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Affiliation(s)
- Mary A. Zimmerman
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, Durham, NC USA
| | - Christan D. Biggers
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, Durham, NC USA
| | - P. Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, Durham, NC USA
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