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Wang MM, Zhang M, Feng YS, Xing Y, Tan ZX, Li WB, Dong F, Zhang F. Electroacupuncture Inhibits Neuronal Autophagy and Apoptosis via the PI3K/AKT Pathway Following Ischemic Stroke. Front Cell Neurosci 2020; 14:134. [PMID: 32477073 PMCID: PMC7242565 DOI: 10.3389/fncel.2020.00134] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 04/21/2020] [Indexed: 12/14/2022] Open
Abstract
Electroacupuncture (EA) is a safe and effective therapy for ischemic stroke in both clinical and laboratory settings. However, the underlying mechanism behind EA treatment for stroke remains unclear. Here, we aimed to evaluate whether EA treatment at the acupoints of Zusanli (ST36) and Quchi (LI11) exerted a neuroprotective effect on ischemic stroke rats by modulating autophagy and apoptosis via the PI3K/AKT/mTOR signaling pathway. EA was performed at 24 h following brain ischemia/reperfusion (I/R) for 30 min per day for 3 days. Our results indicated that EA treatment significantly decreased neurological deficits and cerebral infarct volume in ischemic stroke rats. Also, EA intervention markedly reduced neuronal apoptosis by suppressing the activation of cleaved caspase-3 (CCAS3) at 72 h following I/R, as shown by a Western blot analysis. Furthermore, EA treatment after ischemic stroke suppressed the ischemia activated expression level of LC3II/I and Atg7 and increased the ischemia inhibited expression level of PI3K, phosphorylation of mTOR, phosphorylation of AKT, P62 and LAMP1, hence mediating the autophagy level of the neurocyte, which was reversed by the PI3K inhibitor Dactolisib. In summary, our results indicate that the protective effects of EA treatment at points of Quchi (LI11) and Zusanli (ST36) in rats following cerebral I/R injury was associated with the inhibition of neuronal apoptosis and autophagy via activating the PI3K/AKT/mTOR signaling pathway.
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Affiliation(s)
- Man-Man Wang
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Min Zhang
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Ya-Shuo Feng
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Ying Xing
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Zi-Xuan Tan
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Wen-Bin Li
- Department of Pathophysiology, Hebei Medical University, Shijiazhuang, China
| | - Fang Dong
- Department of Clinical Laboratory Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Feng Zhang
- Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, China.,Hebei Provincial Orthopedic Biomechanics Key Laboratory, The Third Hospital of Hebei Medical University, Shijiazhuang, China
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152
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Liu Y, Liu C, Zhang X, Liu Z, Yan X. Chrysophanol protects PC12 cells against oxygen glucose deprivation-evoked injury by up-regulating miR-216a. Cell Cycle 2020; 19:1433-1442. [PMID: 32401588 DOI: 10.1080/15384101.2020.1731655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Cerebral stroke refers to an acute onset of neurological deficit syndrome. In this research, we attempted to probe into the underlying mechanisms by which chrysophanol (CP) performed its regulatory roles in cerebral stroke. Methods OGD inducement was conducted in PC12 cells to construct a cerebral stroke model. Subsequently, CCK-8 assay, western blot, flow cytometry were utilized to determine cell viability, proliferation, and apoptosis, respectively. qRT-PCR was employed for detecting miR-216a expression level. Afterward, cell transfection was performed to alter miR-216a expression. Further, experiments were conducted to determine the expression of crucial factors participated in PI3 K/AKT and JAK2/STAT3 pathways for exploring the underlying mechanisms. Results OGD inducement suppressed cell viability, while promoted cell apoptosis. Besides, it enhanced the expression of proliferation-associated p53, p21, and apoptosis-associated Bax, and Cleaved-caspase-3, while suppressed the expression of Bcl-2. Furthermore, CHR exposure ameliorated the effects that OGD-evoked, and elevated the expression of miR-216a, as well as the expression of crucial factors participated in PI3 K/AKT and JAK2/STAT3 pathways. However, miR-216a silencing markedly reversed the effects triggered by CHR exposure. Conclusion CHR exposure relieved OGD-evoked PC12 cell damage by elevating miR-216a expression and thereby activating of PI3 K/AKT and JAK2/STAT3 pathways.
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Affiliation(s)
- Yuanyuan Liu
- Department of Neurology, Jining No.1 People's Hospital , Jining, China
| | - Chuanqian Liu
- Department of Traditional Chinese Medicine, Jining No.1 People's Hospital , Jining, China
| | - Xueting Zhang
- Department of Traditional Chinese Medicine, Jining No.1 People's Hospital , Jining, China
| | - Zhenzhen Liu
- Department of Traditional Chinese Medicine, Jining No.1 People's Hospital , Jining, China
| | - Xipeng Yan
- Department of Traditional Chinese Medicine, Jining No.1 People's Hospital , Jining, China
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153
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Pineda-Ramírez N, Calzada F, Alquisiras-Burgos I, Medina-Campos ON, Pedraza-Chaverri J, Ortiz-Plata A, Pinzón Estrada E, Torres I, Aguilera P. Antioxidant Properties and Protective Effects of Some Species of the Annonaceae, Lamiaceae, and Geraniaceae Families against Neuronal Damage Induced by Excitotoxicity and Cerebral Ischemia. Antioxidants (Basel) 2020; 9:E253. [PMID: 32244955 PMCID: PMC7139819 DOI: 10.3390/antiox9030253] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 12/17/2022] Open
Abstract
This study aimed to compare the antioxidant activities of extracts obtained from three plant families and evaluate their therapeutic effect on strokes. Ethanol extracts were obtained from either the leaf or the aerial parts of plants of the families Annonaceae (Annona cherimola, A. diversifolia, A. muricata, A. purpurea, and A. reticulata), Lamiaceae (Salvia amaríssima and S. polystachya), and Geraniaceae (Geranium niveum and G. mexicanum). Extracts were analyzed in terms of hydroxyl radical (OH•), peroxyl radical (ROO•), and superoxide anion (O2•-). The efficiency of the extracts to prevent neuronal death induced by excitotoxicity was tested with the tetrazolium assay, the O2•- scavenging capacity was evaluated with the dihydroethidium dye, and the protective effect of the extracts with the highest antioxidant activity was tested on a stroke experimental model. The extracts' IC50 values (μg/mL) of scavenging varied from 98.9 to 155.04, 4.5 to 102.4, and 20.2 to 118.97 for OH•, ROO•, and O2•-, respectively. In the excitotoxicity model, Annonaceae extracts were highly cytotoxic while Lamiaceae and Geraniaceae reduced intracellular O2•- production and protect neurons against oxidative stress. Salvia polystachya reduced cerebral damage, as well as improved survival and behavior after ischemia. Our results encouraged the use of plant extracts as natural antioxidants to minimize neuronal injury following stroke.
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Affiliation(s)
- Narayana Pineda-Ramírez
- Laboratorio de Patología Vascular Cerebral, Instituto Nacional de Neurología y Neurocirugía “Manuel Velasco Suárez”, México CDMX 14269, Mexico; (N.P.-R.); (I.A.-B.)
| | - Fernando Calzada
- Unidad de Investigación Médica en Farmacología, Hospital de Especialidades, 2 piso CORSE, Centro Médico Nacional Siglo XXI, IMSS, México CDMX 06725, Mexico;
| | - Iván Alquisiras-Burgos
- Laboratorio de Patología Vascular Cerebral, Instituto Nacional de Neurología y Neurocirugía “Manuel Velasco Suárez”, México CDMX 14269, Mexico; (N.P.-R.); (I.A.-B.)
| | - Omar Noel Medina-Campos
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, México CDMX 04510, Mexico; (O.N.M.-C.); (J.P.-C.)
| | - José Pedraza-Chaverri
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México, México CDMX 04510, Mexico; (O.N.M.-C.); (J.P.-C.)
| | - Alma Ortiz-Plata
- Laboratorio de Neuropatología Experimental. Instituto Nacional de Neurología y Neurocirugía “Manuel Velasco Suárez”, México CDMX 14269, Mexico;
| | - Enrique Pinzón Estrada
- Unidad del Bioterio, Facultad de Medicina, Universidad Nacional Autónoma de México, México CDMX 04510, Mexico; (E.P.E.); (I.T.)
| | - Ismael Torres
- Unidad del Bioterio, Facultad de Medicina, Universidad Nacional Autónoma de México, México CDMX 04510, Mexico; (E.P.E.); (I.T.)
| | - Penélope Aguilera
- Laboratorio de Patología Vascular Cerebral, Instituto Nacional de Neurología y Neurocirugía “Manuel Velasco Suárez”, México CDMX 14269, Mexico; (N.P.-R.); (I.A.-B.)
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154
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Feng C, Wan H, Zhang Y, Yu L, Shao C, He Y, Wan H, Jin W. Neuroprotective Effect of Danhong Injection on Cerebral Ischemia-Reperfusion Injury in Rats by Activation of the PI3K-Akt Pathway. Front Pharmacol 2020; 11:298. [PMID: 32218735 PMCID: PMC7078680 DOI: 10.3389/fphar.2020.00298] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 02/27/2020] [Indexed: 12/14/2022] Open
Abstract
Many traditional Chinese medicines, including Danhong injection (DHI), can be used to treat cerebral ischemia-reperfusion injury and have neuroprotective effects on the brain; however, few studies have explored the mechanism by which this effect is generated. In this study, we investigated the neuroprotective effect of DHI against cerebral ischemia-reperfusion injury mediated via the PI3K-Akt signaling pathway. After establishing the model of middle cerebral artery occlusion (MCAO), 60 male Sprague–Dawley rats were allocated to six groups as follows: sham, MCAO, DHI (MCAO + DHI), LY294002 (MCAO + LY294002 [PI3K-Akt pathway specific inhibitor]), DHI + LY294002 (MCAO + DHI + LY294002), and NMDP + LY294002 (MCAO + NMDP [nimodipine] + LY294002). Hematoxylin and eosin (HE) and terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) staining were used to evaluate the pathological changes of brain tissue and the degree of neuronal apoptosis. Real-time quantitative polymerase chain reaction (qRT-PCR), western blot analysis and enzyme-linked immunosorbent assays were used to measure the expression of Bad, Bax, Bcl-2, Bim, P53, MDM2, Akt, PI3K, p-Akt, p-PI3K, and Cyt-C. Compared with the MCAO group, brain tissue cell apoptosis was significantly reduced in the DHI group, and the brain function score was significantly improved. In addition, the expression of pro-apoptotic factors (Bad, Bax, and Bim) was significantly downregulated in the DHI group, while expression of the anti-apoptotic factor Bcl-2 was significantly upregulated, and expression of the apoptotic gene p53 was also significantly attenuated. Moreover, this neuroprotective effect was attenuated by the PI3K-Akt signaling pathway inhibitor (LY294002). Thus, our results confirmed the neuroprotective effects of DHI in rats with ischemia-reperfusion injury and indicate that these effects on the brain are partly generated by activation of the PI3K-Akt signaling pathway.
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Affiliation(s)
- Chen Feng
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Haofang Wan
- Academy of Chinese Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yangyang Zhang
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Li Yu
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Chongyu Shao
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yu He
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Haitong Wan
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Weifeng Jin
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
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155
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Yan Y, Yang H, Xie Y, Ding Y, Kong D, Yu H. Research Progress on Alzheimer's Disease and Resveratrol. Neurochem Res 2020; 45:989-1006. [PMID: 32162143 DOI: 10.1007/s11064-020-03007-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 02/27/2020] [Accepted: 03/03/2020] [Indexed: 12/13/2022]
Abstract
Alzheimer's disease (AD), a common irreversible neurodegenerative disease characterized by amyloid-β plaques, neurofibrillary tangles, and changes in tau phosphorylation, is accompanied by memory loss and symptoms of cognitive dysfunction. Increases in disease incidence due to the ageing of the population have placed a great burden on society. To date, the mechanism of AD and the identities of adequate drugs for AD prevention and treatment have eluded the medical community. It has been confirmed that phytochemicals have certain neuroprotective effects against AD. For example, some progress has been made in research on the use of resveratrol, a natural polyphenolic phytochemical, for the prevention and treatment of AD in recent years. Elucidation of the pathogenesis of AD will create a solid foundation for drug treatment. In addition, research on resveratrol, including its mechanism of action, the roles of signalling pathways and its therapeutic targets, will provide new ideas for AD treatment, which is of great significance. In this review, we discuss the possible relationships between AD and the following factors: synapses, α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-type glutamate receptors (AMPARs), silent information regulator 1 (SIRT1), and estrogens. We also discuss the findings of previous studies regarding these relationships in the context of AD treatment and further summarize research progress related to resveratrol treatment.
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Affiliation(s)
- Yan Yan
- The Department of Epidemiology and Health Statistics, Public Health School of Guangdong Medical University, Dongguan, 523808, Guangdong, China
| | - Huihuang Yang
- The Department of Epidemiology and Health Statistics, Public Health School of Guangdong Medical University, Dongguan, 523808, Guangdong, China
| | - Yuxun Xie
- The Department of Epidemiology and Health Statistics, Public Health School of Guangdong Medical University, Dongguan, 523808, Guangdong, China
| | - Yuanlin Ding
- The Department of Epidemiology and Health Statistics, Public Health School of Guangdong Medical University, Dongguan, 523808, Guangdong, China
| | - Danli Kong
- The Department of Epidemiology and Health Statistics, Public Health School of Guangdong Medical University, Dongguan, 523808, Guangdong, China.
| | - Haibing Yu
- The Department of Epidemiology and Health Statistics, Public Health School of Guangdong Medical University, Dongguan, 523808, Guangdong, China.
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156
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Kadri S, El Ayed M, Limam F, Aouani E, Mokni M. Preventive and curative effects of grape seed powder on stroke using in vitro and in vivo models of cerebral ischemia/reperfusion. Biomed Pharmacother 2020; 125:109990. [PMID: 32070874 DOI: 10.1016/j.biopha.2020.109990] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/15/2020] [Accepted: 01/31/2020] [Indexed: 12/20/2022] Open
Abstract
Stroke is a worldwide concern. Many studies pointed out relevant preventive effect of grape seed powder (GSP) against deleterious brain ischemia/reperfusion (I/R) injury, but curative effect has been scarcely approached. The present work aimed at studying the preventive and curative effect of GSP against stroke using in-vitro and in-vivo models. Primary neuron-astrocyte cocultures were used to evaluate in-vitro GSP protective and curative effect on oxygen-glucose-deprivation (OGD). A murine I/R model, in which GSP was administered as delayed post stroke drug, to evaluate its potential clinically translatable therapy was used and behavioral tests were conducted after 15 days. Ultra-structure of hippocampus dentate gyrus using Transmission Electron Microscopy (TEM) was also undertaken. GSP prevented OGD-induced toxicity and cell death in a dose dependent manner and was neuroprotective as assessed by sustained cell viability (70 % ±1 for OGD + GSP and 37 % ±2 for OGD) and modulated cytokines and brain derived neurotrophic factor (BDNF) expression. GSP also promoted behavioral outcomes by increasing step-down inhibitory time from 17s±4 to 50s±11 and rat overall activities by improving scores in open field test to near control level. Furthermore, GSP protected hippocampus dentate gyrus area from I/R-induced drastic alterations as assessed by reduced autophagic vacuoles.
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Affiliation(s)
- Safwen Kadri
- Bioactive Substances Laboratory, Biotechnology Centre, Technopolis Borj-Cedria, BP-901, 2050, Hammam-Lif, Tunisia.
| | - Mohamed El Ayed
- Bioactive Substances Laboratory, Biotechnology Centre, Technopolis Borj-Cedria, BP-901, 2050, Hammam-Lif, Tunisia
| | - Ferid Limam
- Bioactive Substances Laboratory, Biotechnology Centre, Technopolis Borj-Cedria, BP-901, 2050, Hammam-Lif, Tunisia
| | - Ezzedine Aouani
- Bioactive Substances Laboratory, Biotechnology Centre, Technopolis Borj-Cedria, BP-901, 2050, Hammam-Lif, Tunisia
| | - Meherzia Mokni
- Bioactive Substances Laboratory, Biotechnology Centre, Technopolis Borj-Cedria, BP-901, 2050, Hammam-Lif, Tunisia
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157
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Deng C, Chen S, Li X, Luo H, Zhang Q, Hu P, Wang F, Xiong C, Sun T, Zhang X. Role of the PGE2 receptor in ischemia-reperfusion injury of the rat retina. Mol Vis 2020; 26:36-47. [PMID: 32165825 PMCID: PMC7043643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 02/21/2020] [Indexed: 10/31/2022] Open
Abstract
Purpose To investigate the function and expression of the PGE2 receptors EP1-4 in rat retinal ischemia-reperfusion (I/R) injury and to determine the regulatory role of resveratrol (RES) in this process. Methods In vitro, we stimulated primary astrocytes extracted from the optic disc of rats with epidermal growth factor (EGF) and RES, and detected the location of EP1-4 expression with immunofluorescence. The expression of antiglial fibrillary acidic protein (GFAP), EGF receptor (EGFR), inducible NOS (iNOS), and EP1-4 in astrocytes was detected with western blotting. In vivo, we established an I/R injury model and RES treatment model with Sprague-Dawley rats. Changes in the thickness of the inner retina were observed with hematoxylin and eosin (H&E) staining. EP1-4 localization in the retina was observed with immunohistochemistry. The expression of COX-2, iNOS, and EP1-4 in the control and model groups was detected with western blotting. Results In this study, immunofluorescence and immunohistochemistry showed that EP1-4 are expressed in astrocytes and the rat retina. EGF stimulation increased the expression of EGFR, iNOS, EP1, EP2, and EP4 in astrocytes. The expression of EP1-4 was statistically significantly increased on the third day after model induction, and EP1-4 expression decreased to normal levels on day 7. EGF and RES mediated the decrease in the expression of EP2. RES treatment significantly reduced retinal damage and RGC loss, as demonstrated by the relatively intact tissue structure on day 7 observed with H&E staining. Moreover, inflammation was associated with this I/R injury model, as demonstrated by the early induction of proinflammatory mediators, and this inflammation was significantly attenuated after RES treatment. Conclusions These results indicate that the COX-2/PGE2/EPs pathway is involved in retinal damage and astrocyte inflammation. In addition, the results suggest that the neuroprotective effects of RES may be associated with decreased production of inflammatory mediators. These results suggest that the PGE2 receptor may be a key factor in the treatment of neurodegenerative diseases, and that RES may be used as a possible therapeutic strategy for glaucoma.
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158
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Resveratrol Mitigates Sevoflurane-Induced Neurotoxicity by the SIRT1-Dependent Regulation of BDNF Expression in Developing Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:9018624. [PMID: 32148659 PMCID: PMC7049870 DOI: 10.1155/2020/9018624] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/14/2019] [Accepted: 01/18/2020] [Indexed: 02/07/2023]
Abstract
Various lines of evidence suggest that neonatal exposure to general anesthetics, especially repeatedly, results in neuropathological brain changes and long-term cognitive impairment. Although progress has been made in experimental models, the exact mechanism of GA-induced neurotoxicity in the developing brain remains to be clarified. Sirtuin 1 (SIRT1) plays an important role in synaptic plasticity and cognitive performance, and its abnormal reduction is associated with cognitive dysfunction in neurodegenerative diseases. However, the role of SIRT1 in GA-induced neurotoxicity is unclear to date. In this study, we found that the protein level of SIRT1 was inhibited in the hippocampi of developing mice exposed to sevoflurane. Furthermore, the SIRT1 inhibition in hippocampi was associated with brain-derived neurotrophic factor (BDNF) downregulation modulated by methyl-cytosine-phosphate-guanine–binding protein 2 (MeCP2) and cAMP response element-binding protein (CREB). Pretreatment of neonatal mice with resveratrol nearly reversed the reduction in hippocampal SIRT1 expression, which increased the expression of BDNF in developing mice exposed to sevoflurane. Moreover, changes in the levels of CREB and MeCP2, which were considered to interact with BDNF promoter IV, were also rescued by resveratrol. Furthermore, resveratrol improved the cognitive performance in the Morris water maze test of the adult mice with exposure to sevoflurane in the neonatal stage, without changing motor function in the open field test. Taken together, our findings suggested that SIRT1 deficiency regulated BDNF signaling via regulation of the epigenetic activity of MeCP2 and CREB, and resveratrol might be a promising agent for mitigating sevoflurane-induced neurotoxicity in developing mice.
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159
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Radwan RR, Karam HM. Resveratrol attenuates intestinal injury in irradiated rats via PI3K/Akt/mTOR signaling pathway. ENVIRONMENTAL TOXICOLOGY 2020; 35:223-230. [PMID: 31633274 DOI: 10.1002/tox.22859] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/08/2019] [Accepted: 10/02/2019] [Indexed: 06/10/2023]
Abstract
Radiation-induced enteritis is one of the greatest challenges in radiotherapy. The current study was designed to evaluate the ameliorative effect of resveratrol, which exhibits anti-inflammatory property, against radiation-induced intestinal injury in rats and to explore the underlying mechanism. Rats were exposed to a single dose of 5 Gy. Resveratrol (20 mg/kg/day) was orally administered to irradiated rats over 3 weeks. Results showed that resveratrol ameliorated the intestinal oxidative stress parameters; malondialdehyde (MDA) content, glutathione (GSH) level, and catalase (CAT) activity compared to irradiated group. Furthermore, resveratrol reduced the contents of inflammatory cytokines; tumor necrosis factor α (TNF-α), nuclear factor-kappa (NF-κB), and interleukin 1β (IL-1β) in intestine. Western blotting analysis revealed that resveratrol down-regulated the proteins expression of phosphoinositide 3-kinases (PI3K), protein kinase B (Akt) as well as the mammalian target of rapamycin (mTOR) in intestinal tissues of irradiated rats and thus reduced the inflammatory mediator production. These results were confirmed by histopathological investigation. In conclusion, resveratrol attenuated intestinal inflammation following irradiation via modulating PI3K/Akt/mTOR pathway and thereby could be a promising adjuvant in radiotherapy.
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Affiliation(s)
- Rasha R Radwan
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Heba M Karam
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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160
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Nozohouri S, Sifat AE, Vaidya B, Abbruscato TJ. Novel approaches for the delivery of therapeutics in ischemic stroke. Drug Discov Today 2020; 25:535-551. [PMID: 31978522 DOI: 10.1016/j.drudis.2020.01.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/20/2019] [Accepted: 01/15/2020] [Indexed: 02/06/2023]
Abstract
Here, we review novel approaches to deliver neuroprotective drugs to salvageable penumbral brain areas of stroke injury with the goals of offsetting ischemic brain injury and enhancing recovery.
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Affiliation(s)
- Saeideh Nozohouri
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA
| | - Ali Ehsan Sifat
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA
| | - Bhuvaneshwar Vaidya
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA.
| | - Thomas J Abbruscato
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA.
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161
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Amantea D, Petrelli F, Greco R, Tassorelli C, Corasaniti MT, Tonin P, Bagetta G. Azithromycin Affords Neuroprotection in Rat Undergone Transient Focal Cerebral Ischemia. Front Neurosci 2019; 13:1256. [PMID: 31849581 PMCID: PMC6902046 DOI: 10.3389/fnins.2019.01256] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 11/05/2019] [Indexed: 01/04/2023] Open
Abstract
Repurposing existing drugs represents a promising approach for successful development of acute stroke therapies. In this context, the macrolide antibiotic azithromycin has been shown to exert neuroprotection in mice due to its immunomodulatory properties. Here, we have demonstrated that acute administration of a single dose of azithromycin upon reperfusion produces a dose-dependent (ED50 = 1.40 mg/kg; 95% CI = 0.48-4.03) reduction of ischemic brain damage measured 22 h after transient (2 h) middle cerebral artery occlusion (MCAo) in adult male rats. Neuroprotection by azithromycin (150 mg/kg, i.p., upon reperfusion) was associated with a significant elevation of signal transducer and activator of transcription 3 (STAT3) phosphorylation in astrocytes and neurons of the peri-ischemic motor cortex as detected after 2 and 22 h of reperfusion. By contrast, in the core region of the striatum, drug administration resulted in a dramatic elevation of STAT3 phosphorylation only after 22 h of reperfusion, being the signal mainly ascribed to infiltrating leukocytes displaying an M2 phenotype. These early molecular events were associated with a long-lasting neuroprotection, since a single dose of azithromycin reduced brain infarct damage and neurological deficit measured up to 7 days of reperfusion. These data, together with the evidence that azithromycin was effective in a clinically relevant time-window (i.e., when administered after 4.5 h of MCAo), provide robust preclinical evidence to support the importance of developing azithromycin as an effective acute therapy for ischemic stroke.
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Affiliation(s)
- Diana Amantea
- Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Francesco Petrelli
- Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Rosaria Greco
- Headache Science Center, IRCCS Mondino Foundation, Pavia, Italy
| | - Cristina Tassorelli
- Headache Science Center, IRCCS Mondino Foundation, Pavia, Italy.,Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
| | | | - Paolo Tonin
- Regional Center for Serious Brain Injuries, S. Anna Institute, Crotone, Italy
| | - Giacinto Bagetta
- Section of Preclinical and Translational Pharmacology, Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Rende, Italy
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Park DJ, Kang JB, Shah FA, Koh PO. Resveratrol modulates the Akt/GSK-3β signaling pathway in a middle cerebral artery occlusion animal model. Lab Anim Res 2019; 35:18. [PMID: 32257906 PMCID: PMC7081686 DOI: 10.1186/s42826-019-0019-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 09/25/2019] [Indexed: 12/22/2022] Open
Abstract
Cerebral ischemia is a major cause of neurodegenerative disease. It induces neuronal vulnerability and susceptibility, and leads to neuronal cell death. Resveratrol is a polyphenolic compound that acts as an anti-oxidant. It exerts a neuroprotective effect against focal cerebral ischemic injury. Akt signaling pathway is accepted as a representative cell survival pathway, including proliferation, growth, and glycogen synthesis. This study investigated whether resveratrol regulates Akt/glycogen synthase kinase-3β (GSK-3β) pathway in a middle cerebral artery occlusion (MCAO)-induced ischemic brain injury. Adult male rats were intraperitoneally injected with vehicle or resveratrol (30 mg/kg) and cerebral cortices were isolated 24 h after MCAO. Neurological behavior test, corner test, brain edema measurment, and 2,3,5-triphenyltetrazolium chloride staining were performed to elucidate the neuroprotective effects of resveratrol. Phospho-Akt and phospho-GSK-3β expression levels were measured using Western blot analysis. MCAO injury led to severe neurobehavioral deficit, infraction, and histopathological changes in cerebral cortex. However, resveratrol treatment alleviated these changes caused by MCAO injury. Moreover, MCAO injury induced decreases in phospho-Akt and phospho-GSK-3β protein levels, whereas resveratrol attenuated these decreases. Phosphorylations of Akt and GSK-3β act as a critical role for the suppression of apoptotic cell death. Thus, our finding suggests that resveratrol attenuates neuronal cell death in MCAO-induced cerebral ischemia and Akt/GSK-3β signaling pathway contributes to the neuroprotective effect of resveratrol.
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Affiliation(s)
- Dong-Ju Park
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828 South Korea
| | - Ju-Bin Kang
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828 South Korea
| | - Fawad-Ali Shah
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828 South Korea
| | - Phil-Ok Koh
- Department of Anatomy, College of Veterinary Medicine, Research Institute of Life Science, Gyeongsang National University, 501 Jinju-daero, Jinju, 52828 South Korea
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163
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Exosomes Play an Important Role in the Progression of Plasma Cell Mastitis via the PI3K-Akt-mTOR Signaling Pathway. Mediators Inflamm 2019; 2019:4312016. [PMID: 31281227 PMCID: PMC6590603 DOI: 10.1155/2019/4312016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 04/02/2019] [Accepted: 04/21/2019] [Indexed: 12/19/2022] Open
Abstract
Background Plasma cell mastitis (PCM) is one of the most frequently encountered inflammatory diseases of the nonlactating breast. However, its pathogenesis has remained unknown. Methods In this study, we observed the ultrastructure changes of PCM by a transmission electron microscope. The transcriptome expression difference of exosomes was detected by RNA-Seq; then, we confirmed the key difference genes by western blot and immunohistochemistry. Finally, we established the mouse PCM model by tissue homogenate injection to validate the role of exosomes on the progression of PCM. Results The analysis of the exosomal transcriptome expression difference between PCM and normal mammary tissues using RNA-Seq showed the differential genes and enrichment pathways involved in the course of PCM. The decreased HSP90AA1 and EEF2, excessive production of p-AKT, and p-mTOR were consistent with clinical specimens. Inhibition of exosome secretion significantly inhibited inflammatory cell infiltration, and the mammary duct had maintained a better structure in the PCM mouse model. Conclusion Our results revealed the role of exosomes acting as critical signal introduction facilitators in the progression of plasma cell mastitis and identified potential key genes in the regulation of this process. These results will help to dissect the molecular mechanism of PCM and provide therapeutic targets.
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164
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Zhang S, Botchway BO, Zhang Y, Liu X. Resveratrol can inhibit Notch signaling pathway to improve spinal cord injury. Ann Anat 2019; 223:100-107. [DOI: 10.1016/j.aanat.2019.01.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/30/2019] [Accepted: 01/31/2019] [Indexed: 12/12/2022]
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165
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Chen Y, Shi GW, Liang ZM, Sheng SY, Shi YS, Peng L, Wang YP, Wang F, Zhang XM. Resveratrol improves cognition and decreases amyloid plaque formation in Tg6799 mice. Mol Med Rep 2019; 19:3783-3790. [PMID: 30864708 DOI: 10.3892/mmr.2019.10010] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 09/29/2018] [Indexed: 11/05/2022] Open
Abstract
Alzheimer's disease (AD) is an irreversible, progressive neurodegenerative disorder of the central nervous system that causes severe cognitive impairment. One of the most significant pathological features of AD is the accumulation of β‑amyloid (Aβ) peptide in the brain. Resveratrol (Res) is a polyphenol derived from peanuts, red grapes and other plants, which has received increasing attention due to its neuroprotective features. Tg6799 mice are transgenic mice with five familial AD (FAD) mutations that are also known as 5XFAD mice. The present study aimed to investigate the effects of Res on Tg6799 mice. The transgenic mice were randomly divided into the Res treatment group and the vehicle control group, and were treated with 0.5% Res solution (60 mg/kg) or volume‑matched normal saline, respectively. Treatment was administered by oral gavage daily for 60 consecutive days. Res reduced amyloid plaque formation and the levels of Aβ42, and β‑secretase 1 levels were also significantly decreased. Furthermore, Res was able to reduce the expression of amyloid precursor protein and its cleavage products. The administration of Res to Tg6799 mice also improved their spatial working memory, as measured by the Y‑maze test, and rescued spatial memory deficits, as measured using the Morris water maze test; however, Res did not affect their motor function. In conclusion, this study suggested that Res may reduce Aβ‑induced neuronal damage, thus preventing memory loss.
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Affiliation(s)
- Yue Chen
- Key Laboratory of Psychiatric Disorders of Guangdong Province, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Guang-Wei Shi
- The First Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Zhi-Man Liang
- Key Laboratory of Psychiatric Disorders of Guangdong Province, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Shu-Yue Sheng
- The First Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Yu-Sheng Shi
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Li Peng
- Key Laboratory of Psychiatric Disorders of Guangdong Province, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Ya-Ping Wang
- Key Laboratory of Psychiatric Disorders of Guangdong Province, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Fang Wang
- Key Laboratory of Psychiatric Disorders of Guangdong Province, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Xing-Mei Zhang
- Key Laboratory of Psychiatric Disorders of Guangdong Province, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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166
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Wang J, Wang A, He H, She X, He Y, Li S, Liu L, Luo T, Huang N, Luo H, Zou K. Trametenolic acid B protects against cerebral ischemia and reperfusion injury through modulation of microRNA-10a and PI3K/Akt/mTOR signaling pathways. Biomed Pharmacother 2019; 112:108692. [PMID: 30798122 DOI: 10.1016/j.biopha.2019.108692] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/09/2019] [Accepted: 02/14/2019] [Indexed: 12/13/2022] Open
Abstract
Trametenolic acid B (TAB) was a lanostane-type triterpenoid isolated from the trametes lactinea (Berk.) Pat. We have previously reported that extract from trametes lactinea (Berk.) Pat and TAB could efficiently improve learning and memory ability of the cerebral ischemia injury rats and suppress mitochondrial-mediated apoptosis in hydrogen peroxide damaged SH-SY5Y cells. However, the potential mechanisms have not been fully understood yet. The current study was to further investigate the protective effect of TAB on oxygen glucose deprivation/reoxygenation (OGD/R)-damaged SH-SY5Y cells and cerebral ischemia/reperfusion (I/R) injury rats, as well as its mechanisms involved. Cell experiments demonstrated that TAB (10, 20 and 40 μg/mL) protected OGD/R-induced SH-SY5Y cell injury by promoting cell proliferation and suppressing LDH leakage; Meanwhile, the results in vivo showed that TAB (20, 40 and 80 mg/kg) might significantly ameliorate the neurological deficit score, cerebral edema, neuronal cell loss and apoptosis, suppress cerebral infarction volume of the cerebral I/R injury rats. Further studies in vitro and in vivo indicated TAB could efficiently reduce OGD/R-damaged SH-SY5Y cell and cerebral I/R rat serum ROS, LDH and MDA levels, elevate SOD, GSH-Px and CAT activities, downregulate miR-10a mRNA and Bax, cytochrome C, cleaved-caspase-3 and cleaved-caspase-9 protein expressions, upregulate p-PIK3CA, p-Akt, p-mTOR, Bcl-2, pro-caspase-9 and pro-caspase-3 protein expressions and p-PIK3CA/PIK3CA, p-Akt/Akt, p-mTOR/mTOR ratios (P < 0.05 or P < 0.01, respectively). Our present study indicated that TAB possessed neuroprotective property against ODG/R and I/R injury by suppressing miR-10a expression, activating PI3K/Akt/mTOR signaling pathway, thereby reducing mitochondrial-mediated apoptosis, which provided a new insight for interpreting the underlying mechanisms of TAB' neuroprotective effect and a candidate agent to treat cerebral I/R injury.
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Affiliation(s)
- Junzhi Wang
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
| | - Ailing Wang
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
| | - Haibo He
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China.
| | - Xinxin She
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
| | - Yumin He
- Third-Level Laboratory of Pharmacology of Traditional Chinese Medicine of State Administration of Traditional Chinese Medicine, Medical College, China Three Gorges University, Yichang, China
| | - Shi Li
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
| | - Lanqing Liu
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
| | - Tao Luo
- Institute of Spleen and Stomach Diseases, Traditional Chinese Medicine Hospital of China Three Gorges University & Yichang Hospital of Traditional Chinese Medicine, Yichang, China
| | - Nianyu Huang
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
| | - Huajun Luo
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
| | - Kun Zou
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
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167
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Yamamoto S, Mutoh T, Sasaki K, Mutoh T, Taki Y. Central action of rapamycin on early ischemic injury and related cardiac depression following experimental subarachnoid hemorrhage. Brain Res Bull 2018; 144:85-91. [PMID: 30481554 DOI: 10.1016/j.brainresbull.2018.11.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/12/2018] [Accepted: 11/21/2018] [Indexed: 01/23/2023]
Abstract
Early brain injury and related cardiac consequences play a key role in the devastating outcomes after subarachnoid hemorrhage (SAH). We reported that rapamycin exerts neuroprotection against cortical hypoxia early after SAH, but its mechanism is poorly understood. This in vivo study aimed to determine the potential role of the transcription factor STAT3 in the rapamycin-mediated neuroprotection in a mouse model of SAH. Forty C57BL/6 N mice were treated with an intracerebroventricular injection of rapamycin or vehicle (control) given after SAH induction by a filament perforation method, with or without STAT3 (Stattic) or ERK (PD98059) inhibitor pretreatment. Cerebral blood flow signals (%vascularity), brain tissue oxygen saturation (SbtO2), and cardiac output (CO) were analyzed using an ultrasound/photoacoustic imaging system. Clinically relevant neurocardiac depression was notable in severe SAH mice. Rapamycin improved %vascularity, SbtO2, and CO on day 1 after SAH onset. The beneficial effects of rapamycin on cerebral blood flow and oxygenation persisted until day 3, resulting in a significant reduction in post-SAH new cerebral infarctions and survival, as well as improved neurological functions, compared to the control group. All of the effects were attenuated by pretreatment with Stattic or PD98059. These data suggest that ERK and JAK/STAT3 pathways play an important role in the neurocardiac protection by rapamycin after SAH. We propose that rapamycin is a novel pharmacological strategy to target STAT3 activation, with a possible crosstalk through the ERK pathway, for the treatment of post-SAH early brain injury.
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Affiliation(s)
- Shuzo Yamamoto
- Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Tatsushi Mutoh
- Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
| | - Kazumasu Sasaki
- Department of Preclinical Evaluation, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Tomoko Mutoh
- Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Yasuyuki Taki
- Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
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