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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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Auld N, Flood K, Kesharwani T, Cavnar PJ. A study on the cellular and cytotoxic effects of S and Se heterocycles on the myeloid leukemia cell line PLB-985. PHOSPHORUS SULFUR 2022; 197:876-884. [PMID: 36970371 PMCID: PMC10035560 DOI: 10.1080/10426507.2022.2085272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This paper describes the synthesis of several halogenated S and Se heterocycles and tests their biological activity by measuring the effects on the myeloid leukemia cell line, PLB-985 cells. We report that select compounds exhibit significant increases in mitochondria membrane potential and increased oxidative stress in PLB-985 cells. Our results contribute to the foundational knowledge of different S and Se containing compounds and their possible impacts on human cells.
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Affiliation(s)
- Niccole Auld
- Department of Biology, University of West Florida, Pensacola, FL, USA
| | - Krystal Flood
- Department of Biology, University of West Florida, Pensacola, FL, USA
| | - Tanay Kesharwani
- Department of Chemistry, University of West Florida, Pensacola, FL, USA
| | - Peter J. Cavnar
- Department of Biology, University of West Florida, Pensacola, FL, USA
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3
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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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4
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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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5
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Hwang Y, Kim HC, Shin EJ. Repeated exposure to microcystin-leucine-arginine potentiates excitotoxicity induced by a low dose of kainate. Toxicology 2021; 460:152887. [PMID: 34352349 DOI: 10.1016/j.tox.2021.152887] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/15/2021] [Accepted: 07/30/2021] [Indexed: 02/08/2023]
Abstract
Microcystin-leucine-arginine (MLCR) is a cyanobacterial toxin, and has been demonstrated to cause neurotoxicity. In addition, MCLR has been identified as an inhibitor of protein phosphatase (PP)1 and PP2A, which are known to regulate the phosphorylation of various molecules related to synaptic excitability. Thus, in the present study, we examined whether MCLR exposure affects seizures induced by a low dose of kainic acid (KA; 0.05 μg, i.c.v.) administration. KA-induced seizure occurrence and seizure score significantly increased after repeated exposure to MCLR (2.5 or 5.0 μg/kg, i.p., once a day for 10 days), but not after acute MCLR exposure (2.5 or 5.0 μg/kg, i.p., 2 h and 30 min prior to KA administration), and hippocampal neuronal loss was consistently facilitated by repeated exposure to MCLR. In addition, repeated MCLR significantly elevated the membrane expression of kainate receptor GluK2 subunits, p-pan-protein kinase C (PKC), and p-extracellular signal-related kinase (ERK) at 1 h after KA. However, KA-induced membrane expression of Ca2+/calmodulin-dependent kinase II (CaMKII) was significantly reduced by repeated MCLR exposure. Consistent with the enhanced seizures and neurodegeneration, MCLR exposure significantly potentiated KA-induced oxidative stress and microglial activation, which was accompanied by increased expression of p-ERK and p-PKCδ in the hippocampus. The combined results suggest that repeated MCLR exposure potentiates KA-induced excitotoxicity in the hippocampus by increasing membrane GluK2 expression and enhancing oxidative stress and neuroinflammation through the modulation of p-CaMKII, p-PKC, and p-ERK.
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Affiliation(s)
- Yeonggwang Hwang
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Hyoung-Chun Kim
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea.
| | - Eun-Joo Shin
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea.
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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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7
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Zhang Y, Gliyazova NS, Li PA, Ibeanu G. Phenoxythiophene sulfonamide compound B355252 protects neuronal cells against glutamate-induced excitotoxicity by attenuating mitochondrial fission and the nuclear translocation of AIF. Exp Ther Med 2021; 21:221. [PMID: 33603830 PMCID: PMC7851598 DOI: 10.3892/etm.2021.9652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 12/03/2020] [Indexed: 01/03/2023] Open
Abstract
Glutamate neurotoxicity has been implicated in the initiation and progression of various neurological and neurodegenerative disorders. Therefore, it is necessary to develop therapeutics for the treatment of patients with these devastating diseases. Mitochondrial fission plays an import role in the mediation of cell death and survival. The objective of the present study was to determine whether B355252, a phenoxythiophene sulfonamide derivative, reduces glutamate-induced cell death by inhibiting mitochondrial fission and the nuclear translocation of apoptosis-inducing factor (AIF) in glutamate-challenged HT22 neuronal cells. The results revealed that glutamate treatment led to large increases in the mitochondrial levels of the major fission proteins dynamin-related protein 1 (Drp1) and mitochondrial fission 1 protein (Fis1), but only small elevations in the fusion proteins mitofusin 1 and 2 (Mfn1/2) and optic atrophy 1 (Opa1). In addition, glutamate toxicity disrupted mitochondrial reticular networks and increased the translocation of AIF to the nucleus. Pretreatment with B35525 reduced glutamate-induced cell death and prevented the increases in the protein levels of Drp1, Fis1, Mfn1/2 and Opa1 in the mitochondrial fraction. More importantly, the architecture of the mitochondria was protected and nuclear translocation of AIF was completely inhibited by B35525. These findings suggest that the regulation of mitochondrial dynamics is central to the neuroprotective properties of B355252, and presents an attractive opportunity for potential development as a therapy for neurodegenerative disorders associated with mitochondria dysfunction.
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Affiliation(s)
- Yuxin Zhang
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA.,Institute of Clinical Pharmacology, Department of Pharmacy, General Hospital of Ningxia Medical University, Ningxia 750004, P.R. China.,School of Pharmacy, Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Nailya S Gliyazova
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA
| | - P Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA
| | - Gordon Ibeanu
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC 27707, USA
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8
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Kim HJ, Baek SY, Sok DE, Lee KJ, Kim YJ, Kim MR. Neuroprotective Activity of Polyphenol-Rich Ribes diacanthum Pall against Oxidative Stress in Glutamate-Stimulated HT-22 Cells and a Scopolamine-Induced Amnesia Animal Model. Antioxidants (Basel) 2020; 9:antiox9090895. [PMID: 32967207 PMCID: PMC7555254 DOI: 10.3390/antiox9090895] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/11/2020] [Accepted: 09/18/2020] [Indexed: 12/13/2022] Open
Abstract
Ribes diacanthum Pall, a native Mongolian medicinal plant, has been reported to show antioxidant activities due to its polyphenol and flavonoid content, and is especially rich in the ethyl acetate fraction from an 80% methanol extraction (RDP). We assessed the cytoprotective effect of RDP on glutamate-caused oxidative stress and apoptosis in mouse hippocampal neuronal cells (HT-22 cells). Cell viability was significantly recovered by RDP treatment. Also, RDP effectively decreased the glutamate-induced production of intracellular reactive oxygen species (ROS). In flow cytometric analysis, apoptotic cells and the mitochondrial membrane potential were suppressed by RDP. In the Western blotting analysis, we found that RDP not only decreased the release of apoptotic proteins but also recovered anti-apoptotic protein. Additionally, RDP enhanced the antioxidant defense system by regulating the expression of antioxidant enzymes. Furthermore, treatment with RDP activated the BDNF/TrkB pathway. In accordance with the in vitro results, RDP meliorated memory deficit by defending hippocampal neuronal cells against oxidative damage in scopolamine-injected mice. Taken together, our present study showed that RDP exerted antioxidant and neuroprotective actions against oxidative stress. Therefore, RDP might facilitate the development of candidates for functional health foods for neurodegenerative disorders.
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Affiliation(s)
- Hyun Jeong Kim
- Department of Food and Nutrition, Chungnam National University, Daejeon 34134, Korea; (H.J.K.); (S.Y.B.)
| | - Seung Yeon Baek
- Department of Food and Nutrition, Chungnam National University, Daejeon 34134, Korea; (H.J.K.); (S.Y.B.)
| | - Dai-Eun Sok
- College of Pharmacy, Chungnam National University, Daejeon 34134, Korea;
| | - Kun Jong Lee
- Department of Food and Nutrition, Soongeui Women’s College, Seoul 04628, Korea;
| | - Young-Jun Kim
- Department of Food Science and Technology, Seoul National University of Science and technology, Seoul 01811, Korea;
| | - Mee Ree Kim
- Department of Food and Nutrition, Chungnam National University, Daejeon 34134, Korea; (H.J.K.); (S.Y.B.)
- Correspondence: ; Tel.: +82-42-821-6837; Fax: +82-42-821-8887
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9
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Chimeh U, Zimmerman MA, Gilyazova N, Li PA. B355252, A Novel Small Molecule, Confers Neuroprotection Against Cobalt Chloride Toxicity In Mouse Hippocampal Cells Through Altering Mitochondrial Dynamics And Limiting Autophagy Induction. Int J Med Sci 2018; 15:1384-1396. [PMID: 30275767 PMCID: PMC6158673 DOI: 10.7150/ijms.24702] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 04/12/2018] [Indexed: 12/31/2022] Open
Abstract
Cerebral hypoxia as often occurs in cases of stroke, hemorrhage, or other traumatic brain injuries, is one of the leading causes of death worldwide and a main driver of disabilities in the elderly. Using a chemical mimetic of hypoxia, cobalt chloride (CoCl2), we tested the ability of a novel small molecule, 4-chloro-N-(naphthalen-1-ylmethyl)-5-(3-(piperazin-1-yl)phenoxy)thiophene-2-sulfonamide (B355252), to alleviate CoCl2-induced damage in mouse hippocampal HT22 cells. A dose-dependent decrease in cell viability was observed during CoCl2 treatment along with increases in mitochondrial membrane potential and generation of reactive oxygen species (ROS). B355252 conferred protection against these changes. We further found that mitochondrial dynamics, the balance between mitochondrial fusion and fission, were perturbed by CoCl2 treatment. Mitochondrial fusion, which was assessed by measuring the expression of proteins optic atrophy protein 1 (OPA1) and mitofusin 2 (Mfn2), declined due to CoCl2 exposure, but B355252 addition was able to elevate Mfn2 expression while OPA1 expression was unchanged. Mitochondrial fission, measured by phosphorylated dynamin-related protein 1 (p-DRP1) and fission protein 1 (FIS1) expression, also decreased following CoCl2 exposure, and was stabilized by B355252 addition. Finally, autophagy was assessed by measuring the conversion of cytosolic microtubule-associated protein 1A/1B-light chain three-I (LC3-I) to autophagosome-bound microtubule-associated protein 1A/1B-light chain three-II (LC3-II) and was found to be increased by CoCl2. B355252 addition significantly reduced autophagy induction. Taken together, our results indicate B355252 has therapeutic potential to reduce the damaging effects caused by CoCl2 and should be further evaluated for applications in cerebral ischemia therapy.
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Affiliation(s)
| | | | | | - P. Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, Durham, NC USA
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10
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Lee HY, Ryu GH, Choi WY, Yang WS, Lee HW, Ma CJ. Protective Effect of Water Extracted Spirulina maxima on Glutamate-induced Neuronal Cell Death in Mouse Hippocampal HT22 Cell. Pharmacogn Mag 2018; 14:242-247. [PMID: 29720839 PMCID: PMC5909323 DOI: 10.4103/pm.pm_191_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 07/05/2017] [Indexed: 12/20/2022] Open
Abstract
Introduction: Spirulina maxima was used as important nutritional source in the Aztec civilization because it is rich in proteins and vitamins. It contains various antioxidants such as phycocyanin and flavonoids. Based on abundant antioxidants, S. maxima is known to possess anti-inflammatory effect, especially on neuronal cells. Materials and Methods: S. maxima was extracted in water and contain of phycocyanin was identified by high-performance liquid chromatography. Cell viability test was performed with treatment of S. maxima extract. After, oxidative stress-related mechanisms were evaluated by detecting the accumulation of reactive oxygen species (ROS) and Ca2+ influx, and decrease of mitochondrial membrane potential (MMP) level. Then, the glutathione (GSH) related assays were conducted. Results: The water extracted S. maxima exerted the neuroprotective activity by attenuating the ROS and Ca2+ formation, maintaining the MMP level, and protecting the activity of the antioxidant enzymes by increasing reduced GSH against oxidative stress compared to control. Conclusion: The results suggested that water extracted S. maxima showed powerful neuroprotective effect through the mechanism related to antioxidant activity, able to preventing the radical-mediated cell death. SUMMARY Water extracted Spirulina maxima contains C-phycocyanin Water extracted Spirulina maxima exerts neuroprotective effect on HT22 cell To investigate the protective mechanisms, reactive oxygen species, Ca2+, mitochondrial membrane potential, Glutathione-related assays were performed.
Abbreviations used: ROS: Reactive oxygen species; MMP: Mitochondrial membrane potential; GSH: Glutathione; GSSG: Glutathione disulfide, oxidized glutathione; GPx: Glutathione peroxidase; GR: Glutathione reductase; DMEM: Dulbecco's modified Eagle's medium; FBS: Fetal bovine serum; DCF-DA: 2',7'-dichlorofluorescein diacetate; PBS: Phosphate buffered serum; Rho 123: Rhodamine 123; NADPH: Nicotinamide adenine dinucleotide phosphate; DTNB: 5,5'-dithiobis-2-nitrobenzoic acid, Ellman's reagent; GSSG-R: Glutathione disulfide reductase; MTT: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide; DMSO: Dimethyl sulfoxide; HPLC: High-performance liquid chromatography.
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Affiliation(s)
- Hyeon Yong Lee
- Department of Teaics, Seowon University, Musimseo-ro, Seowon-gu, Cheongju-si, Chungcheongbuk-do, Republic of Korea
| | - Ga Hee Ryu
- Department of Medical Biomaterials Engineering, College of Biomedical Science, Kangwon National University, Gangwondaehak-gil, Chuncheon-si, Gangwon-do, Republic of Korea
| | - Woon Yong Choi
- Department of Medical Biomaterials Engineering, College of Biomedical Science, Kangwon National University, Gangwondaehak-gil, Chuncheon-si, Gangwon-do, Republic of Korea
| | - Woo Seung Yang
- Department of Medical Biomaterials Engineering, College of Biomedical Science, Kangwon National University, Gangwondaehak-gil, Chuncheon-si, Gangwon-do, Republic of Korea
| | - Hyeon Woo Lee
- Department of Medical Biomaterials Engineering, College of Biomedical Science, Kangwon National University, Gangwondaehak-gil, Chuncheon-si, Gangwon-do, Republic of Korea
| | - Choong Je Ma
- Department of Medical Biomaterials Engineering, College of Biomedical Science, Kangwon National University, Gangwondaehak-gil, Chuncheon-si, Gangwon-do, Republic of Korea.,Institute of Bioscience and Biotechnology, Kangwon National University, Gangwondaehak-gil, Chuncheon-si, Gangwon-do, Republic of Korea
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11
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Ma YM, Guo YZ, Ibeanu G, Wang LY, Dong JD, Wang J, Jing L, Zhang JZ, Li PA. Overexpression of selenoprotein H prevents mitochondrial dynamic imbalance induced by glutamate exposure. Int J Biol Sci 2017. [PMID: 29535592 PMCID: PMC5845479 DOI: 10.7150/ijbs.21300] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Selenium and selenoproteins play important roles in neuroprotection against glutamate‑induced cell damage, in which mitochondrial dysfunction is considered a major pathogenic feature. Recent studies have revealed that mitochondrial fission could activates mitochondrial initiated cell death pathway. The objectives of the study are to determine whether glutamate induced cell death is mediated through mitochondrial initiated cell death pathway and activation of autophagy, and whether overexpression of selenoprotein H can protect cells from glutamate toxicity by preserving mitochondrial morphology and suppressing autophagy. Vector- or human selenoprotein H (SelH)-transfected HT22 cells (V-HT22 and SelH-HT22, respectively) were exposed to glutamate. The results showed that glutamate-induced cytotoxicity was associated with increased ROS production and imbalance in mitochondrial dynamics and autophagy. These alterations were reversed and cellular integrity restored by overexpression of SelH in HT22 cells.
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Affiliation(s)
- Yan-Mei Ma
- School of Basic Medical Sciences, Department of Pathology, Ningxia Medical University; Ningxia Key Laboratory of Cerebrocranial Diseases, Yinchuan, Ningxia, P. R. China
| | - Yong-Zhen Guo
- School of Basic Medical Sciences, Department of Pathology, Ningxia Medical University; Ningxia Key Laboratory of Cerebrocranial Diseases, Yinchuan, Ningxia, P. R. China
| | - Gordon Ibeanu
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, USA
| | - Li-Yao Wang
- Department of Pathology, Shanxi Traditional Chinese Medicine Hospital, Xi'an, Shanxi, P. R. China
| | - Jian-Da Dong
- School of Basic Medical Sciences, Department of Pathology, Ningxia Medical University; Ningxia Key Laboratory of Cerebrocranial Diseases, Yinchuan, Ningxia, P. R. China
| | - Juan Wang
- School of Basic Medical Sciences, Department of Pathology, Ningxia Medical University; Ningxia Key Laboratory of Cerebrocranial Diseases, Yinchuan, Ningxia, P. R. China
| | - Li Jing
- School of Basic Medical Sciences, Department of Pathology, Ningxia Medical University; Ningxia Key Laboratory of Cerebrocranial Diseases, Yinchuan, Ningxia, P. R. China
| | - Jian-Zhong Zhang
- School of Basic Medical Sciences, Department of Pathology, Ningxia Medical University; Ningxia Key Laboratory of Cerebrocranial Diseases, Yinchuan, Ningxia, P. R. China
| | - P Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, USA
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Kim MH, Min JS, Lee JY, Chae U, Yang EJ, Song KS, Lee HS, Lee HJ, Lee SR, Lee DS. Oleuropein isolated from Fraxinus rhynchophylla inhibits glutamate-induced neuronal cell death by attenuating mitochondrial dysfunction. Nutr Neurosci 2017; 21:520-528. [PMID: 28448247 DOI: 10.1080/1028415x.2017.1317449] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Glutamate-induced neurotoxicity is related to excessive oxidative stress accumulation and results in the increase of neuronal cell death. In addition, glutamate has been reported to lead to neurodegenerative diseases, including Parkinson's and Alzheimer's diseases.It is well known that Fraxinus rhynchophylla contains a significant level of oleuropein (Ole), which exerts various pharmacological effects. However, the mechanism of neuroprotective effects of Ole is still poorly defined. In this study, we aimed to investigate whether Ole prevents glutamate-induced toxicity in HT-22 hippocampal neuronal cells. The exposure of the glutamate treatment caused neuronal cell death through an alteration of Bax/Bcl-2 expression and translocation of mitochondrial apoptosis-inducing factor (AIF) to the cytoplasm of HT-22 cells. In addition, glutamate induced an increase in dephosphorylation of dynamin-related protein 1 (Drp1), mitochondrial fragmentation, and mitochondrial dysfunction. The pretreatment of Ole decreased Bax expression, increased Bcl-2 expression, and inhibited the translocation of mitochondrial AIF to the cytoplasm. Furthermore, Ole amended a glutamate-induced mitochondrial dynamic imbalance and reduced the number of cells with fragmented mitochondria, regulating the phosphorylation of Drp1 at amino acid residue serine 637. In conclusion, our results show that Ole has a preventive effect against glutamate-induced toxicity in HT-22 hippocampal neuronal cells. Therefore, these data imply that Ole may be an efficient approach for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Mi Hye Kim
- a School of Life Science, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University , Daegu , Republic of Korea.,b College of Natural Sciences, Kyungpook National University , Daegu , Republic of Korea
| | - Ju-Sik Min
- a School of Life Science, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University , Daegu , Republic of Korea.,b College of Natural Sciences, Kyungpook National University , Daegu , Republic of Korea.,c Korea Research Institute of Bioscience and Biotechnology (KRIBB) , Daejeon , Republic of Korea
| | - Joon Yeop Lee
- d College of Pharmacy, Kyungpook National University , Republic of Korea.,e Traditional Korean Medicine Technology Division, National Development Institute of Korean Medicine , Gyeongsangbuk-do , Republic of Korea
| | - Unbin Chae
- a School of Life Science, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University , Daegu , Republic of Korea.,b College of Natural Sciences, Kyungpook National University , Daegu , Republic of Korea
| | - Eun-Ju Yang
- d College of Pharmacy, Kyungpook National University , Republic of Korea
| | - Kyung-Sik Song
- d College of Pharmacy, Kyungpook National University , Republic of Korea
| | - Hyun-Shik Lee
- a School of Life Science, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University , Daegu , Republic of Korea.,b College of Natural Sciences, Kyungpook National University , Daegu , Republic of Korea
| | - Hong Jun Lee
- f Biomedical Research Institute, Chung-Ang University College of Medicine , Seoul , Republic of Korea
| | - Sang-Rae Lee
- g National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB) , Chungcheongbuk-do , Republic of Korea
| | - Dong-Seok Lee
- a School of Life Science, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University , Daegu , Republic of Korea.,b College of Natural Sciences, Kyungpook National University , Daegu , Republic of Korea
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13
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Ma YM, Ibeanu G, Wang LY, Zhang JZ, Chang Y, Dong JD, Li PA, Jing L. Selenium suppresses glutamate-induced cell death and prevents mitochondrial morphological dynamic alterations in hippocampal HT22 neuronal cells. BMC Neurosci 2017; 18:15. [PMID: 28103798 PMCID: PMC5244737 DOI: 10.1186/s12868-017-0337-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 01/12/2017] [Indexed: 01/17/2023] Open
Abstract
Background Previous studies have indicated that selenium supplementation may be beneficial in neuroprotection against glutamate-induced cell damage, in which mitochondrial dysfunction is considered a major pathogenic feature. However, the exact mechanisms by which selenium protects against glutamate-provoked mitochondrial perturbation remain ambiguous. In this study glutamate exposed murine hippocampal neuronal HT22 cell was used as a model to investigate the underlying mechanisms of selenium-dependent protection against mitochondria damage. Results We find that glutamate-induced cytotoxicity was associated with enhancement of superoxide production, activation of caspase-9 and -3, increases of mitochondrial fission marker and mitochondrial morphological changes. Selenium significantly resolved the glutamate-induced mitochondria structural damage, alleviated oxidative stress, decreased Apaf-1, caspases-9 and -3 contents, and altered the autophagy process as observed by a decline in the ratio of the autophagy markers LC3-I and LC3-II. Conclusion These findings suggest that the protection of selenium against glutamate stimulated cell damage of HT22 cells is associated with amelioration of mitochondrial dynamic imbalance.
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Affiliation(s)
- Yan-Mei Ma
- Department of Pathology, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia, 750004, People's Republic of China
| | - Gordon Ibeanu
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), North Carolina Central University, Durham, NC, 27707, USA
| | - Li-Yao Wang
- Department of Pathology, Shanxi Traditional Chinese Medicine Hospital, Xi'an, Shanxi, People's Republic of China
| | - Jian-Zhong Zhang
- Department of Pathology, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia, 750004, People's Republic of China
| | - Yue Chang
- Department of Pathology, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia, 750004, People's Republic of China
| | - Jian-Da Dong
- Department of Pathology, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia, 750004, People's Republic of China
| | - P Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technological Enterprise (BRITE), North Carolina Central University, Durham, NC, 27707, USA.
| | - Li Jing
- Department of Pathology, Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, Ningxia, 750004, People's Republic of China.
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14
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Metabolic Alterations and the Protective Effect of Punicalagin Against Glutamate-Induced Oxidative Toxicity in HT22 Cells. Neurotox Res 2017; 31:521-531. [DOI: 10.1007/s12640-016-9697-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 12/26/2016] [Accepted: 12/27/2016] [Indexed: 01/19/2023]
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15
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Duffy CM, Nixon JP, Butterick TA. Orexin A attenuates palmitic acid-induced hypothalamic cell death. Mol Cell Neurosci 2016; 75:93-100. [PMID: 27449757 DOI: 10.1016/j.mcn.2016.07.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 07/15/2016] [Accepted: 07/19/2016] [Indexed: 10/21/2022] Open
Abstract
Palmitic acid (PA), an abundant dietary saturated fatty acid, contributes to obesity and hypothalamic dysregulation in part through increase in oxidative stress, insulin resistance, and neuroinflammation. Increased production of reactive oxygen species (ROS) as a result of PA exposure contributes to the onset of neuronal apoptosis. Additionally, high fat diets lead to changes in hypothalamic gene expression profiles including suppression of the anti-apoptotic protein B cell lymphoma 2 (Bcl-2) and upregulation of the pro-apoptotic protein B cell lymphoma 2 associated X protein (Bax). Orexin A (OXA), a hypothalamic peptide important in obesity resistance, also contributes to neuroprotection. Prior studies have demonstrated that OXA attenuates oxidative stress induced cell death. We hypothesized that OXA would be neuroprotective against PA induced cell death. To test this, we treated an immortalized hypothalamic cell line (designated mHypoA-1/2) with OXA and PA. We demonstrate that OXA attenuates PA-induced hypothalamic cell death via reduced caspase-3/7 apoptosis, stabilization of Bcl-2 gene expression, and reduced Bax/Bcl-2 gene expression ratio. We also found that OXA inhibits ROS production after PA exposure. Finally, we show that PA exposure in mHypoA-1/2 cells significantly reduces basal respiration, maximum respiration, ATP production, and reserve capacity. However, OXA treatment reverses PA-induced changes in intracellular metabolism, increasing basal respiration, maximum respiration, ATP production, and reserve capacity. Collectively, these results support that OXA protects against PA-induced hypothalamic dysregulation, and may represent one mechanism through which OXA can ameliorate effects of obesogenic diet on brain health.
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Affiliation(s)
- Cayla M Duffy
- Minneapolis Veterans Affairs Health Care System, Research 151, One Veterans Dr, Minneapolis, MN 55417, USA; Department of Food Science and Nutrition, University of Minnesota, 1334 Eckles Ave, St. Paul, MN 55108, USA
| | - Joshua P Nixon
- Minneapolis Veterans Affairs Health Care System, Research 151, One Veterans Dr, Minneapolis, MN 55417, USA; Department of Food Science and Nutrition, University of Minnesota, 1334 Eckles Ave, St. Paul, MN 55108, USA
| | - Tammy A Butterick
- Minneapolis Veterans Affairs Health Care System, Research 151, One Veterans Dr, Minneapolis, MN 55417, USA; Department of Food Science and Nutrition, University of Minnesota, 1334 Eckles Ave, St. Paul, MN 55108, USA; Minnesota Obesity Center, University of Minnesota, 1334 Eckles Ave, St. Paul, MN 55108, USA.
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16
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Ludka FK, Dal-Cim T, Binder LB, Constantino LC, Massari C, Tasca CI. Atorvastatin and Fluoxetine Prevent Oxidative Stress and Mitochondrial Dysfunction Evoked by Glutamate Toxicity in Hippocampal Slices. Mol Neurobiol 2016; 54:3149-3161. [DOI: 10.1007/s12035-016-9882-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Accepted: 03/21/2016] [Indexed: 01/04/2023]
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17
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Zheng Y, Zhou J, Fu SZ, Fan J, Wu JB. In vitro and in vivo studies on the inhibitory effects of myocardial cell culture medium on growth of a human lung adenocarcinoma cell line, A549. ACTA ACUST UNITED AC 2016; 23:e35-40. [PMID: 26966411 DOI: 10.3747/co.23.2844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Although the heart is one of the body's vital organs, with an abundant blood supply, metastasis to the heart is considered rare. In a previous study, we found that the myocardial microenvironment might contain a low molecular weight natural tumour suppressor. The present study was designed to investigate the inhibitory effect of cardiac myocyte-conditioned medium (cmcm) on the growth of A549 human lung adenocarcinoma cells in vitro and in vivo. METHODS An mtt assay was used to detect the inhibition ratio with respect to A549 proliferation. Human lung adenocarcinoma cells (A549 cell strain) were transplanted subcutaneously into nude mice to produce tumours. The xenograft tumour growth in mice was observed after selected drug administration. RESULTS After treatment with cmcm and cisplatin (Cis), A549 cell viability significantly declined (p < 0.001). The cell viability in the cmcm and Cis groups were 53.42% ± 3.45% and 58.45% ± 6.39% respectively. Growth of implanted tumour cells in vivo was significantly inhibited in the cmcm group, the group treated with recombinant human adenovirus-p53, and the Cis-treated group compared with a control group. The inhibition rates were 41.44% in the cmcm group, 41.34% in the p53 group, and 64.50% in the Cis group. Lung metastasis capacity was significantly reduced in the presence of cmcm (p < 0.05). Lung metastasis inhibition rates in mice were 56.52% in the cmcm group, 47.83% in the p53 group, and 82.61% in the Cis group. With cmcm, the lives of A549-tumour-bearing mice could be significantly prolonged without any effect on weight loss. CONCLUSIONS Use of cmcm has the effect of reducing A549 cell viability, tumour volume, and lung metastasis rate, while prolonging survival duration without severe toxicity.
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Affiliation(s)
- Y Zheng
- Department of Oncology, The Affiliated Hospital of Luzhou Medical College, Luzhou, P.R.C
| | - J Zhou
- Third Military Medical University, Chongqin, P.R.C
| | - S Z Fu
- Department of Oncology, The Affiliated Hospital of Luzhou Medical College, Luzhou, P.R.C
| | - J Fan
- Department of Oncology, The Affiliated Hospital of Luzhou Medical College, Luzhou, P.R.C
| | - J B Wu
- Department of Oncology, The Affiliated Hospital of Luzhou Medical College, Luzhou, P.R.C
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18
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Bak DH, Kim HD, Kim YO, Park CG, Han SY, Kim JJ. Neuroprotective effects of 20(S)-protopanaxadiol against glutamate-induced mitochondrial dysfunction in PC12 cells. Int J Mol Med 2015; 37:378-86. [PMID: 26709399 PMCID: PMC4716797 DOI: 10.3892/ijmm.2015.2440] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 12/10/2015] [Indexed: 11/09/2022] Open
Abstract
Ginseng (Panax ginseng C.A. Mey.) is commonly used in traditional oriental medicine for its wide spectrum of medicinal properties, including anti-inflammatory, antitumorigenic, adaptogenic and anti-aging properties. 20(S)-Protopanaxadiol (PPD), the main intestinal metabolite of ginsenosides, is one of the active ingredients in ginseng. In this study, we aimed to investigate the neuroprotective effects of PPD on PC12 cells; however, the underlying mechanisms remain elusive. We examined cell viability by MTT assay and the morphological changes of PC12 cells following glutamate-induced cell damage and evaluated the anti-apoptotic effects of PPD using Hoechst 33258 staining, western blot analysis and Muse™ Cell Analyzer and the antioxidant effects of PPD using FACS analysis and immunofluorescence. Furthermore, PPD exerted protective effects on PC12 cells via the inhibition of mitochondrial damage against glutamate-induced excitotoxicity using immunofluorescence, electron microscopy and FACS analysis. We demonstrate that treatment with PPD suppresses apoptosis, which contributes to the neuroprotective effects of PPD against glutamate-induced excitotoxicity in PC12 cells. Treatment with PPD inhibited nuclear condensation and decreased the number of Annexin V-positive cells. In addition, PPD increased antioxidant activity and mitochondrial homeostasis in the glutamate-exposed cells. These antioxidant effects were responsible for the neuroprotection and enhanced mitochondrial function following treatment with PPD. Furthermore, PD inhibited the glutamate-induced morphological changes in the mitochondria and scavenged the mitochondrial and cytosolic reactive oxygen species (ROS) induced by glutamate. In addition, mitochondrial function was significantly improved in terms of mitochondrial membrane potential (MMP) and enhanced mitochondrial mass compared with the cells exposed to glutamate and not treated with PPD. Taken together, the findings of our study indicate that the antioxidant effects and the enhanced mitochondrial function triggered by PPD contribute to the inhibition of apoptosis, thus leading to a neuroprotective response, as a novel survival mechanism.
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Affiliation(s)
- Dong-Ho Bak
- Department of Anatomy, College of Medicine, Konyang University, Daejeon 302-718, Republic of Korea
| | - Hyung Don Kim
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Eumseong, Chungbuk 369-873, Republic of Korea
| | - Young Ock Kim
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Eumseong, Chungbuk 369-873, Republic of Korea
| | - Chun Geun Park
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Eumseong, Chungbuk 369-873, Republic of Korea
| | - Seung-Yun Han
- Department of Anatomy, College of Medicine, Konyang University, Daejeon 302-718, Republic of Korea
| | - Jwa-Jin Kim
- Department of Anatomy, College of Medicine, Konyang University, Daejeon 302-718, Republic of Korea
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19
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Gliyazova NS, Ibeanu GC. The Chemical Molecule B355252 is Neuroprotective in an In Vitro Model of Parkinson's Disease. Cell Mol Neurobiol 2015; 36:1109-22. [PMID: 26649727 DOI: 10.1007/s10571-015-0304-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 11/08/2015] [Indexed: 12/11/2022]
Abstract
6-Hydroxydopamine (6-OHDA) is a neurotoxin frequently used to create in vitro and in vivo experimental models of Parkinson's disease (PD), a chronic neurodegenerative disorder largely resulting from damage to the nigrostriatal dopaminergic pathway. No effective drugs or therapies have been developed for this devastating disorder, and current regimens of symptomatic therapeutics only alleviate symptoms temporarily. Therefore, effective treatments that reverse or cure this disorder are urgently needed. The aim of the study described in this report was to investigate the therapeutic impact of B355252, an aryl thiophene sulfonamide chemical entity, in the widely recognized in vitro model of PD, and to characterize the molecular signaling pathways. We show here that 6-OHDA-induced cell death in HT22, a murine neuronal cell model, through a pathway that involves the mitochondria by increasing the levels of reactive oxygen species (ROS), raising intracellular calcium ([Ca(2+)]i), enhancing the release of cytochrome c to the cytosol, and promoting activation of stress-activated protein kinase/c-Jun NH2-terminal kinase (SAPK/JNK) signaling pathway. More importantly, we found that B355252 protected HT22 neurons against 6-OHDA toxin-induced neuronal cell death by significant attenuation of ROS production, blocking of mitochondrial depolarization, inhibition of cytochrome c release, sequestration of [Ca(2+)]i, modulation of JNK cascade, and strong inhibition of caspase 3/7 cleavage. Overall, this study demonstrates that death of neurons under toxic conditions characteristic of PD can be efficiently halted by B355252 and suggests that further development of the molecule could be potentially beneficial as a therapeutic prevention or treatment option for PD.
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Affiliation(s)
- Nailya S Gliyazova
- Biomanufacturing Research Institute and Technology Enterprise (BRITE), 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 Sciences, North Carolina Central University, Durham, NC, 27707, USA.
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20
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Gorska M, Zmijewski MA, Kuban-Jankowska A, Wnuk M, Rzeszutek I, Wozniak M. Neuronal Nitric Oxide Synthase-Mediated Genotoxicity of 2-Methoxyestradiol in Hippocampal HT22 Cell Line. Mol Neurobiol 2015; 53:5030-40. [PMID: 26381428 DOI: 10.1007/s12035-015-9434-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 09/10/2015] [Indexed: 02/06/2023]
Abstract
2-methoxyestradiol, metabolite of 17β-estradiol, is considered a potential anticancer agent, currently investigated in several clinical trials. This natural compound was found to be effective towards great number of cancers, including colon, breast, lung, and osteosarcoma and has been reported to be relatively non-toxic towards non-malignant cells. The aim of the study was to determine the potential neurotoxicity and genotoxicity of 2-methoxyestradiol at physiological and pharmacological relevant concentrations in hippocampal HT22 cell line. Herein, we determined influence of 2-methoxyestradiol on proliferation, inhibition of cell cycle, induction of apoptosis, and DNA damage in the HT22 cells. The study was performed using imaging cytometry and comet assay techniques. Herein, we demonstrated that 2-methoxyestradiol, at pharmacologically and also physiologically relevant concentrations, increases nuclear localization of neuronal nitric oxide synthase. It potentially results in DNA strand breaks and increases in genomic instability in hippocampal HT22 cell line. Thus, we are postulating that naturally occurring 2-methoxyestradiol may be considered a physiological modulator of neuron survival.
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Affiliation(s)
- Magdalena Gorska
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk 80-211, Debinki 1 St, Poland.
| | | | - Alicja Kuban-Jankowska
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk 80-211, Debinki 1 St, Poland
| | - Maciej Wnuk
- Department of Genetics, University of Rzeszow, Rzeszow, Poland
| | - Iwona Rzeszutek
- Department of Genetics, University of Rzeszow, Rzeszow, Poland
| | - Michal Wozniak
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk 80-211, Debinki 1 St, Poland
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21
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Kritis AA, Stamoula EG, Paniskaki KA, Vavilis TD. Researching glutamate - induced cytotoxicity in different cell lines: a comparative/collective analysis/study. Front Cell Neurosci 2015; 9:91. [PMID: 25852482 PMCID: PMC4362409 DOI: 10.3389/fncel.2015.00091] [Citation(s) in RCA: 230] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 02/26/2015] [Indexed: 12/21/2022] Open
Abstract
Although glutamate is one of the most important excitatory neurotransmitters of the central nervous system, its excessive extracellular concentration leads to uncontrolled continuous depolarization of neurons, a toxic process called, excitotoxicity. In excitotoxicity glutamate triggers the rise of intracellular Ca2+ levels, followed by up regulation of nNOS, dysfunction of mitochondria, ROS production, ER stress, and release of lysosomal enzymes. Excessive calcium concentration is the key mediator of glutamate toxicity through over activation of ionotropic and metabotropic receptors. In addition, glutamate accumulation can also inhibit cystine (CySS) uptake by reversing the action of the CySS/glutamate antiporter. Reversal of the antiporter action reinforces the aforementioned events by depleting neurons of cysteine and eventually glutathione’s reducing potential. Various cell lines have been employed in the pursuit to understand the mechanism(s) by which excitotoxicity affects the cells leading them ultimately to their demise. In some cell lines glutamate toxicity is exerted mainly through over activation of NMDA, AMPA, or kainate receptors whereas in other cell lines lacking such receptors, the toxicity is due to glutamate induced oxidative stress. However, in the greatest majority of the cell lines ionotropic glutamate receptors are present, co-existing to CySS/glutamate antiporters and metabotropic glutamate receptors, supporting the assumption that excitotoxicity effect in these cells is accumulative. Different cell lines differ in their responses when exposed to glutamate. In this review article the responses of PC12, SH-SY5Y, HT-22, NT-2, OLCs, C6, primary rat cortical neurons, RGC-5, and SCN2.2 cell systems are systematically collected and analyzed.
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Affiliation(s)
- Aristeidis A Kritis
- Laboratory of Physiology, Department of Physiology and Pharmacology, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki Greece
| | - Eleni G Stamoula
- Laboratory of Physiology, Department of Physiology and Pharmacology, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki Greece
| | - Krystallenia A Paniskaki
- Laboratory of Physiology, Department of Physiology and Pharmacology, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki Greece
| | - Theofanis D Vavilis
- Laboratory of Physiology, Department of Physiology and Pharmacology, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki Greece
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22
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Radiation protection from whole-body gamma irradiation (6.7 Gy): behavioural effects and brain protein-level changes by an aminothiol compound GL2011 in the Wistar rat. Amino Acids 2014; 46:1681-96. [DOI: 10.1007/s00726-014-1728-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 03/10/2014] [Indexed: 10/25/2022]
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