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Liu T, Wang P, Yin H, Wang X, Lv J, Yuan J, Zhu J, Wang Y. Rapamycin reverses ferroptosis by increasing autophagy in MPTP/MPP +-induced models of Parkinson's disease. Neural Regen Res 2023; 18:2514-2519. [PMID: 37282484 PMCID: PMC10360095 DOI: 10.4103/1673-5374.371381] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023] Open
Abstract
Parkinson's disease is a neurodegenerative disorder, and ferroptosis plays a significant role in the pathological mechanism underlying Parkinson's disease. Rapamycin, an autophagy inducer, has been shown to have neuroprotective effects in Parkinson's disease. However, the link between rapamycin and ferroptosis in Parkinson's disease is not entirely clear. In this study, rapamycin was administered to a 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced Parkinson's disease mouse model and a 1-methyl-4-phenylpyridinium-induced Parkinson's disease PC12 cell model. The results showed that rapamycin improved the behavioral symptoms of Parkinson's disease model mice, reduced the loss of dopamine neurons in the substantia nigra pars compacta, and reduced the expression of ferroptosis-related indicators (glutathione peroxidase 4, recombinant solute carrier family 7, member 11, glutathione, malondialdehyde, and reactive oxygen species). In the Parkinson's disease cell model, rapamycin improved cell viability and reduced ferroptosis. The neuroprotective effect of rapamycin was attenuated by a ferroptosis inducer (methyl (1S,3R)-2-(2-chloroacetyl)-1-(4-methoxycarbonylphenyl)-1,3,4,9-tetrahyyridoindole-3-carboxylate) and an autophagy inhibitor (3-methyladenine). Inhibiting ferroptosis by activating autophagy may be an important mechanism by which rapamycin exerts its neuroprotective effects. Therefore, the regulation of ferroptosis and autophagy may provide a therapeutic target for drug treatments in Parkinson's disease.
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Affiliation(s)
- Tongyu Liu
- Department of Neurology, Affiliated Taihe Hospital; Institute of Neuroscience, Hubei University of Medicine, Shiyan, Hubei Province, China
| | - Peihan Wang
- Department of Neurology, Affiliated Taihe Hospital; Institute of Neuroscience, Hubei University of Medicine, Shiyan, Hubei Province, China
| | - Huan Yin
- Department of Neurology, Affiliated Taihe Hospital; Institute of Neuroscience, Hubei University of Medicine, Shiyan, Hubei Province, China
| | - Xiangfei Wang
- Wudang Mountain Hospital Area of Taihe Hospital, Affiliated Hospital of Hubei University of Medicine, Shiyan, Hubei Province, China
| | - Jing Lv
- Department of Neurology, Affiliated Taihe Hospital; Institute of Neuroscience, Hubei University of Medicine, Shiyan, Hubei Province, China
| | - Jiang Yuan
- Department of Neurology, Affiliated Taihe Hospital, Hubei University of Medicine, Shiyan, Hubei Province, China
| | - Jing Zhu
- Department of Neurology, Affiliated Taihe Hospital; Institute of Neuroscience, Hubei University of Medicine; Wudang Mountain Hospital Area of Taihe Hospital, Affiliated Hospital of Hubei University of Medicine, Shiyan, Hubei Province, China
| | - Yunfu Wang
- Department of Neurology, Affiliated Taihe Hospital; Institute of Neuroscience, Hubei University of Medicine, Shiyan, Hubei Province, China
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Sun W, Chen X, Mei Y, Li X, Yang Y, An L. Co-exposure of melamine and cyanuric acid as a risk factor for oxidative stress and energy metabolism: Adverse effects on hippocampal neuronal and synaptic function induced by excessive ROS production. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 247:114230. [PMID: 36306617 DOI: 10.1016/j.ecoenv.2022.114230] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/16/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
Melamine (MEL) and cyanuric acid (CA) alone have relatively low toxicity, but together they may cause serious damage to multiple organs, including the central nervous system, however, the underlying mechanism is unknown. This study aimed to determine and compare the neurotoxic effects of MEL (20 μg/mL), CA (20 μg/mL) and their combination (10 μg/mL MEL and 10 μg/mL CA) on cultured hippocampal neurons. The cell viability, apoptosis, anti-oxidative and energy metabolic indices were detected following 24 h of incubations. The miniature excitatory postsynaptic currents (mEPSCs), miniature inhibitory postsynaptic currents (mIPSCs) and synaptic plasticity in the hippocampal CA1 neurons were recorded. Moreover, ROS scavenger NAC was co-infused to investigate the potential mechanism. We found the complex of MEL and CA but not their alone caused severe cell death and disturbed energy production through activation caspase-3-mediated apoptosis. Meanwhile, the combination significantly reduced the amplitude, decay time and frequency of mEPSCs but not mIPSCs, indicating the pre- and post-synaptic inhibitory actions on neuronal activity. Paired-pulsed ratio (PPR) and long-term potentiation (LTP) at the Schaffer collateral-CA1 synapses were critically depressed. However, the co-application of NAC could effectively mitigate the cellular apoptosis, energy metabolism dysfunction and the impairments in neuronal and synaptic function. Our findings provide the first evidence that the combination of MEL and CA can exert more prominently neurotoxic effects than their alone and certify that one of the potential mechanisms for neuronal and synaptic dysfunction is the ROS-mediated signaling pathway.
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Affiliation(s)
- Wei Sun
- Department of Pediatric, The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550001, China; Behavioral Neuroscience Laboratory, The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550001, China
| | - Xiao Chen
- Behavioral Neuroscience Laboratory, The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550001, China; Graduate School of Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Yazi Mei
- Graduate School of Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Xiaoliang Li
- Department of Neurology, Jinan Geriatric/Rehabilitation Hospital, Jinan 250013, China
| | - Yang Yang
- Department of Pediatric, The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550001, China
| | - Lei An
- Department of Pediatric, The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550001, China; Behavioral Neuroscience Laboratory, The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550001, China; Department of Neurology, Jinan Geriatric/Rehabilitation Hospital, Jinan 250013, China; Department of Neurology, The First Affiliated Hospital, Guizhou University of Traditional Chinese Medicine, Guiyang, Guizhou 550001, China.
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Wang H, Xu X, Pan YC, Yan Y, Hu XY, Chen R, Ravoo BJ, Guo DS, Zhang T. Recognition and Removal of Amyloid-β by a Heteromultivalent Macrocyclic Coassembly: A Potential Strategy for the Treatment of Alzheimer's Disease. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2006483. [PMID: 33325586 DOI: 10.1002/adma.202006483] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/20/2020] [Indexed: 06/12/2023]
Abstract
The imbalance of amyloid-β (Aβ) production and clearance causes aggregation of Aβ1-42 monomers to form fibrils and amyloid plaques, which is an indispensable process in the pathogenesis of Alzheimer's disease (AD), and eventually leads to pathological changes and cognitive impairment. Consequently, Aβ1-42 is the most important target for the treatment of AD. However, developing a single treatment method that can recognize Aβ1-42 , inhibit Aβ1-42 fibrillation, eliminate amyloid plaques, improve cognitive impairments, and alleviate AD-like pathology is challenging. Here, a coassembly composed of cyclodextrin (CD) and calixarene (CA) is designed, and it is used as an anti-Aβ therapy agent. The CD-CA coassembly is based on the previously reported heteromultivalent recognition strategy and is able to successfully eliminate amyloid plaques and degrade Aβ1-42 monomers in 5xFAD mice. More importantly, the coassembly improves recognition and spatial cognition deficits, and synaptic plasticity impairment in the 5xFAD mice. In addition, the coassembly ameliorates AD-like pathology including prevention of neuronal apoptosis and oxidant stress, and alteration of M1/M2 microglial polarization states. This supramolecular approach makes full use of both molecular recognition and self-assembly of macrocyclic amphiphiles, and is a promising novel strategy for AD treatment.
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Affiliation(s)
- Hui Wang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - XinXin Xu
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Yu-Chen Pan
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, Tianjin, 300071, P. R. China
| | - YuXing Yan
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Xin-Yue Hu
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, Tianjin, 300071, P. R. China
| | - RunWen Chen
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Bart Jan Ravoo
- Organic Chemistry Institute and Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster, Busso-Peus-Straße 10, Münster, 48149, Germany
| | - Dong-Sheng Guo
- College of Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, Tianjin, 300071, P. R. China
| | - Tao Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
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Chen ZQ, Sun XH, Li XJ, Xu ZC, Yang Y, Lin ZY, Xiao HM, Zhang M, Quan SJ, Huang HQ. Polydatin attenuates renal fibrosis in diabetic mice through regulating the Cx32-Nox4 signaling pathway. Acta Pharmacol Sin 2020; 41:1587-1596. [PMID: 32724174 PMCID: PMC7921128 DOI: 10.1038/s41401-020-0475-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 07/06/2020] [Indexed: 12/12/2022] Open
Abstract
We previously found that polydatin could attenuate renal oxidative stress in diabetic mice and improve renal fibrosis. Recent evidence shows that NADPH oxidase 4 (Nox4)-derived reactive oxygen species (ROS) contribute to inflammatory and fibrotic processes in diabetic kidneys. In this study we investigated whether polydatin attenuated renal fibrosis by regulating Nox4 in vitro and in vivo. In high glucose-treated rat glomerular mesangial cells, polydatin significantly decreased the protein levels of Nox4 by promoting its K48-linked polyubiquitination, thus inhibited the production of ROS, and eventually decreasing the expression of fibronectin (FN) and intercellular adhesion molecule-1 (ICAM-1), the main factors that exacerbate diabetic renal fibrosis. Overexpression of Nox4 abolished the inhibitory effects of polydatin on FN and ICAM-1 expression. In addition, the expression of Connexin32 (Cx32) was significantly decreased, which was restored by polydatin treatment. Cx32 interacted with Nox4 and reduced its protein levels. Knockdown of Cx32 abolished the inhibitory effects of polydatin on the expression of FN and ICAM-1. In the kidneys of streptozocin-induced diabetic mice, administration of polydatin (100 mg·kg-1·d-1, ig, 6 days a week for 12 weeks) increased Cx32 expression and reduced Nox4 expression, decreased renal oxidative stress levels and the expression of fibrotic factors, eventually attenuating renal injury and fibrosis. In conclusion, polydatin promotes K48-linked polyubiquitination and degradation of Nox4 by restoring Cx32 expression, thereby decreasing renal oxidative stress levels and ultimately ameliorating the pathological progress of diabetic renal fibrosis. Thus, polydatin reduces renal oxidative stress levels and attenuates diabetic renal fibrosis through regulating the Cx32-Nox4 signaling pathway.
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Affiliation(s)
- Zhi-Quan Chen
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
- Department of Pharmacology, School of Pharmacy, Guangxi Medical University, Nanning, 530021, China
| | - Xiao-Hong Sun
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Xue-Juan Li
- Department of Pharmacy, Shenzhen Children's Hospital, Shenzhen, 518026, China
| | - Zhan-Chi Xu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Yan Yang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Ze-Yuan Lin
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Hai-Ming Xiao
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Meng Zhang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Shi-Jian Quan
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China.
| | - He-Qing Huang
- Laboratory of Pharmacology & Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China.
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China.
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Liu X, Wu Y, Zhou D, Xie Y, Zhou Y, Lu Y, Yang R, Liu S. N‑linoleyltyrosine protects PC12 cells against oxidative damage via autophagy: Possible involvement of CB1 receptor regulation. Int J Mol Med 2020; 46:1827-1837. [PMID: 33000188 PMCID: PMC7521587 DOI: 10.3892/ijmm.2020.4706] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 07/21/2020] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress is one of the main pathogenic factors of neurodegenerative diseases. As the ligand of cannabinoid type 1 (CB1) and 2 (CB2) receptors, anandamide (AEA) exerts benign antioxidant activities. However, the instability of AEA results in low levels in vivo, which limit its further application. Based on the structure of AEA, N‑linoleyltyrosine (NITyr) was synthesized in our laboratory and was hypothesized to possess a similar function to that of AEA. To the best of our knowledge, the present study demonstrates for the first time, the activities and mechanisms of NITyr. NITyr treatment attenuated hydrogen peroxide (H2O2)‑induced cytotoxicity, with the most promiment effect observed at 1 µmol/l. Treatment with NITyr also suppressed the H2O2‑induced elevation of reactive oxygen species (ROS) and enhanced the expression of the autophagy‑related proteins, LC3‑II, beclin‑1, ATG 5 and ATG13. The autophagic inhibitor, 3‑methyladenine, reversed the effects of NITyr on ROS levels and cellular viability. Furthermore, AM251, a CB1 receptor antagonist, but not AM630 (a CB2 receptor antagonist), diminished the effects of NITyr on cell viability, ROS generation and autophagy‑related protein expression. However, NITyr increased the protein expression of both the CB1 and CB2 receptors. Therefore, NITyr was concluded to protect PC12 cells against H2O2‑induced oxidative injury by inducing autophagy, a process which may involve the CB1 receptor.
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Affiliation(s)
- Xuechen Liu
- Department of Pharmacy, Development and Regeneration Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
| | - Yiying Wu
- Department of Pharmacy, Development and Regeneration Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
| | - Dan Zhou
- Department of Pharmacy, Development and Regeneration Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
| | - Yuting Xie
- Department of Pharmacy, Development and Regeneration Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
| | - Yi Zhou
- Research and Development Center, Chengdu Rongsheng Pharmaceuticals Co., Ltd., Chengdu, Sichuan 610200, P.R. China
| | - Yu Lu
- Department of Pharmacy, Development and Regeneration Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
| | - Rui Yang
- Department of Pharmacy, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
| | - Sha Liu
- Department of Pharmacy, Development and Regeneration Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
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Wang H, Xu X, Xu X, Gao J, Zhang T. Enriched Environment and Social Isolation Affect Cognition Ability via Altering Excitatory and Inhibitory Synaptic Density in Mice Hippocampus. Neurochem Res 2020; 45:2417-2432. [PMID: 32748366 DOI: 10.1007/s11064-020-03102-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 07/16/2020] [Accepted: 07/22/2020] [Indexed: 12/18/2022]
Abstract
The purpose of the study was to examine whether the underlying mechanism of the alteration of cognitive ability and synaptic plasticity induced by the housing environment is associated with the balance of excitatory/inhibitory synaptic density. Enriched environment (EE) and social isolation (SI) are two different housing environment, and one is to give multiple sensory environments, the other is to give monotonous and lonely environment. Male 4-week-old C57 mice were divided into three groups: CON, EE and SI. They were housed in the different cage until 3 months of age. Morris water maze and novel object recognition were performed. Long term potentiation (LTP), depotentiation (DEP) and local field potentials were recorded in the hippocampal perforant pathway and dentate gyrus (DG) region. The data showed that EE enhanced the ability of spatial learning, reversal learning and memory as well as LTP/DEP in the hippocampal DG region. Meanwhile, SI reduced those abilities and the level of LTP/DEP. Moreover, there were higher couplings of both phase-amplitude and phase-phase in the EE group, and lower couplings of them in the SI group compared to that in the CON group. Western blot and immunofluorescence analysis showed that EE significantly enhanced the level of PSD-95, NR2B and DCX; however, SI reduced them but increased GABAARα1 and decreased DCX levels. The data suggests that the cognitive functions, synaptic plasticity, neurogenesis and neuronal oscillatory patterns were significantly impacted by housing environment via possibly changing the balance of excitatory and inhibitory synaptic density.
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Affiliation(s)
- Hui Wang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, People's Republic of China
- School of Mathematical Sciences, Nankai University, Tianjin, 300071, People's Republic of China
| | - Xiaxia Xu
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, People's Republic of China
| | - Xinxin Xu
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, People's Republic of China
| | - Jing Gao
- School of Medicine, Nankai University, Tianjin, 300071, People's Republic of China
| | - Tao Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, Tianjin, 300071, People's Republic of China.
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Hydroxy- α-sanshool Possesses Protective Potentials on H 2O 2-Stimulated PC12 Cells by Suppression of Oxidative Stress-Induced Apoptosis through Regulation of PI3K/Akt Signal Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:3481758. [PMID: 32695254 PMCID: PMC7368233 DOI: 10.1155/2020/3481758] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 06/06/2020] [Accepted: 06/24/2020] [Indexed: 01/02/2023]
Abstract
Zanthoxylum bungeanum pericarp is a commonly used herbal medicine in China with effects of anti-inflammatory and analgesic, improving learning and memory ability, while hydroxy-α-sanshool (HAS) is the most important active ingredient of Z. bungeanum pericarps. The purpose of this study was to investigate the neuroprotective effect of HAS and its related possible mechanisms using a H2O2-stimulated PC12 cell model. CCK-8 assay results showed that HAS had a significant protective effect on H2O2-stimulated PC12 cells without obvious cytotoxicity on normal PC12 cells. Flow cytometry and fluorescence microscope (DAPI staining and DCFH-DA staining) indicated that HAS could reduce the H2O2-induced apoptosis in PC12 cells via reduction of intracellular ROS and increase of mitochondrial membrane potential (MMP). Subsequently, results of malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) determination suggested that HAS could increase the enzyme activities of SOD, CAT, and GSH-Px whereas it could decrease the MDA contents in H2O2-stimulated PC12 cells. Furthermore, the western blotting assays showed that HAS could upregulate the expressions of p-PI3k, Akt, p-Akt, and Bcl-2, while it could downregulate the expressions of cleaved caspase-3 and Bax in H2O2-stimulated PC12 cells. Collectively, it could be concluded according to our results that HAS possesses protective potentials on H2O2-stimulated PC12 cells through suppression of oxidative stress-induced apoptosis via regulation of PI3K/Akt signal pathway.
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Zheng X, Lei B, Lin Y, Sui M, Zhang M, Zhuang Z, Dong J, Jin D, Yan T. Long noncoding RNA MEG3 silencing protects against hypoxia‐induced pheochromocytoma‐12 cell injury through inhibition of TIMP2 promoter methylation. J Cell Physiol 2019; 235:1649-1662. [PMID: 31392726 DOI: 10.1002/jcp.29085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 06/21/2019] [Indexed: 01/23/2023]
Affiliation(s)
- Xiu‐Yuan Zheng
- Department of Rehabilitation Medicine, Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou P.R. China
| | - Bing‐Xi Lei
- Department of Rehabilitation Medicine, Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou P.R. China
| | - Yang‐Yang Lin
- Department of Rehabilitation Medicine, The Sixth Affiliated Hospital Sun Yat‐sen University Guangzhou P.R. China
| | - Ming‐Hong Sui
- Department of Rehabilitation Medicine, Shenzhen Nanshan People's Hospital (The Sixth People's Hospital of Shenzhen) Shenzhen University Shenzhen P.R. China
| | - Ma‐Lan Zhang
- Department of Rehabilitation Medicine, Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou P.R. China
| | - Zhi‐Qiang Zhuang
- Department of Rehabilitation Medicine, Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou P.R. China
| | - Jun‐Tao Dong
- Department of Rehabilitation Medicine, The Third Affiliated Hospital Sun Yat‐sen University Guangzhou P.R. China
| | - Dong‐Mei Jin
- Department of Rehabilitation Medicine, Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou P.R. China
| | - Tie‐Bin Yan
- Department of Rehabilitation Medicine, Sun Yat‐sen Memorial Hospital Sun Yat‐sen University Guangzhou P.R. China
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Antiepileptic Effects of Protein-Rich Extract from Bombyx batryticatus on Mice and Its Protective Effects against H 2O 2-Induced Oxidative Damage in PC12 Cells via Regulating PI3K/Akt Signaling Pathways. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:7897584. [PMID: 31198493 PMCID: PMC6526569 DOI: 10.1155/2019/7897584] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 04/15/2019] [Indexed: 02/08/2023]
Abstract
Bombyx batryticatus is a known traditional Chinese medicine (TCM) utilized to treat convulsions, epilepsy, cough, asthma, headaches, and purpura in China for thousands of years. This study is aimed at investigating the antiepileptic effects of protein-rich extracts from Bombyx batryticatus (BBPs) on seizure in mice and exploring the protective effects of BBPs against H2O2-induced oxidative stress in PC12 cells and their underlying mechanisms. Maximal electroshock-induced seizure (MES) and pentylenetetrazole- (PTZ-) induced seizure in mice and the histological analysis were carried out to evaluate the antiepileptic effects of BBPs. The cell viability of PC12 cells stimulated by H2O2 was determined by MTT assay. The apoptosis and ROS levels of H2O2-stimulated PC12 cells were determined by flow cytometry analysis. Furthermore, the levels of malondialdehyde (MDA), superoxide dismutase (SOD), lactate dehydrogenase (LDH), and glutathione (GSH) in PC12 cells were assayed by ELISA and expressions of caspase-3, caspase-9, Bax, Bcl-2, PI3K, Akt, and p-Akt were evaluated by Western blotting and quantitative real-time polymerase chain reaction (RT-qPCR) assays. The results revealed that BBPs exerted significant antiepileptic effects on mice. In addition, BBPs increased the cell viability of H2O2-stimulated PC12 cells and reduced apoptotic cells and ROS levels in H2O2-stimulated PC12 cells. By BBPs treatments, the levels of MDA and LDH were reduced and the levels of SOD and GSH-Px were increased in H2O2-stimulated PC12 cells. Moreover, BBPs upregulated the expressions of PI3K, Akt, p-Akt, and Bcl-2, whereas they downregulated the expressions of caspase-9, caspase-3, and Bax in H2O2-stimulated PC12 cells. These findings suggested that BBPs possessed potential antiepileptic effects on MES and PTZ-induced seizure in mice and protective effects on H2O2-induced oxidative stress in PC12 cells by exerting antioxidative and antiapoptotic effects via PI3K/Akt signaling pathways.
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Wang HJ, Wei JY, Liu DX, Zhuang SF, Li Y, Liu H, Ban M, Fang WG, Cao L, Zhao WD, Chen YH. Endothelial Atg7 Deficiency Ameliorates Acute Cerebral Injury Induced by Ischemia/Reperfusion. Front Neurol 2018; 9:998. [PMID: 30555402 PMCID: PMC6280951 DOI: 10.3389/fneur.2018.00998] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 11/05/2018] [Indexed: 12/24/2022] Open
Abstract
Ischemic strokes often result in cerebral injury due to ischemia/reperfusion (I/R). Although the local inflammatory responses are known to play a primary role in the brain I/R injury, the underlying mechanism remains unclear. In the current study, we investigated the effect of brain endothelial Atg7 (autophagy related 7) depletion in the acute brain injury induced by ischemia and reperfusion. Endothelial knockout of Atg7 in mice (Atg7 eKO) was found to significantly attenuate both the infarct volume and the neurological defects induced by I/R when compared to the controls. In fact, brain inflammatory responses induced by I/R were alleviated by the Atg7 eKO. Furthermore, an increased expression of pro-inflammatory cytokines, including IL-1β, IL-6, IL-8, and TNF-α, was observed in brain endothelial cells in response to oxygen/glucose depletion/reoxygenation, which was decreased by the shRNA-mediated Atg7 knockdown. Interestingly, Atg7 knockdown reduced IKKβ phosphorylation, leading to NF-κB deactivation and downregulation of the pro-inflammatory cytokines mRNA levels. Further, Atg7 transcriptional regulation function is independent of its role in autophagy. Taken together, our results demonstrated that brain endothelial Atg7 contributes to brain damage during I/R by modulating the expression of pro-inflammatory cytokines. Depletion of Atg7 in brain endothelium has a neuroprotective effect against the ischemia/reperfusion-induced acute cerebral injury during stroke.
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Affiliation(s)
- Hui-Jie Wang
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Jia-Yi Wei
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Dong-Xin Liu
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Shi-Fang Zhuang
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Yuan Li
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Hui Liu
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Meng Ban
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Wen-Gang Fang
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Liu Cao
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Wei-Dong Zhao
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
| | - Yu-Hua Chen
- Key Laboratory of Cell Biology, Ministry of Public Health, and Key Laboratory of Medical Cell Biology, Ministry of Education, Department of Developmental Cell Biology, China Medical University, Shenyang, China
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11
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AG1031 induces apoptosis through suppressing SIRT1/p53 pathway in human neuroblastoma cells. Mol Cell Biochem 2018; 454:165-175. [DOI: 10.1007/s11010-018-3461-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 10/16/2018] [Indexed: 12/31/2022]
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12
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Wang Y, Wang H, Ge H, Yang Z. AG‐1031 induced autophagic cell death and apoptosis in C6 glioma cells associated with Notch‐1 signaling pathway. J Cell Biochem 2018; 119:5893-5903. [DOI: 10.1002/jcb.26781] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 02/02/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Yan Wang
- Medical School, State Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Bioactive Materials for Ministry of EducationNankai UniversityTianjinChina
| | - Hui Wang
- College of Life SciencesNankai UniversityTianjinChina
| | - Hui Ge
- AscentGene, Inc.GaithersburgMD
| | - Zhuo Yang
- Medical School, State Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Bioactive Materials for Ministry of EducationNankai UniversityTianjinChina
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13
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Lei Y, Wang C, Jiang Q, Sun X, Du Y, Zhu Y, Lu Y. Calpain activation and disturbance of autophagy are induced in cortical neurons in vitro by exposure to HA/ β-Ga 2O 3:Cr 3+ nanoparticles. PeerJ 2018; 6:e4365. [PMID: 29441243 PMCID: PMC5807884 DOI: 10.7717/peerj.4365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 01/23/2018] [Indexed: 01/14/2023] Open
Abstract
The toxicity of engineered nanoparticles remains a concern. The knowledge of biohazards associated with particular nanoparticles is crucial to make this cutting-edge technology more beneficial and safe. Here, we evaluated the toxicity of Ga2O3 nanoparticles (NPs), which are frequently used to enhance the performance of metal catalysts in a variety of catalytic reactions. The potential inflammatory signaling associated with the toxicity of HA/β-Ga2O3:Cr3+ NPs in primary cortical neurons was examined. We observed a dose-dependent decrease in cell viability and an increase in apoptosis in neurons following various concentrations (0, 1, 5, 25, 50, 100 µg/ml) of HA/β-Ga2O3:Cr3+ NPs treatment. Consistently, constitutively active forms of calcineurin (48 kDa) were significantly elevated in cultured primary cortical neurons, which was consistent with calpain activation indicated by the breakdown products of spectrin. Moreover, HA/β-Ga2O3:Cr3+ NPs result in the elevation of LC3-II formation, SQSTM/p62, and Cathepsin B, whereas phosphorylation of CaMKII (Thr286) and Synapsin I (Ser603) were downregulated in the same context. Taken together, these results demonstrate for the first time that calpain activation and a disturbance of autophagy signaling are evoked by exposure to HA/β-Ga2O3:Cr3+ NPs, which may contribute to neuronal injury in vitro.
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Affiliation(s)
- Yu Lei
- College of Pharmaceutical Sciences, Zhejiang Unviersity, Hangzhou, Zhejiang Province, China
| | - Chengkun Wang
- College of Pharmaceutical Sciences, Zhejiang Unviersity, Hangzhou, Zhejiang Province, China
| | - Quan Jiang
- College of Pharmaceutical Sciences, Zhejiang Unviersity, Hangzhou, Zhejiang Province, China
| | - Xiaoyi Sun
- School of Medicine, Zhejiang University City College, Hangzhou, Zhejiang Province, China
| | - Yongzhong Du
- College of Pharmaceutical Sciences, Zhejiang Unviersity, Hangzhou, Zhejiang Province, China
| | - Yaofeng Zhu
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang Province, China
| | - Yingmei Lu
- School of Medicine, Zhejiang University City College, Hangzhou, Zhejiang Province, China
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14
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U1 small nuclear RNA overexpression implicates autophagic-lysosomal system associated with AD. Neurosci Res 2018; 136:48-55. [PMID: 29395359 DOI: 10.1016/j.neures.2018.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/09/2018] [Accepted: 01/19/2018] [Indexed: 11/20/2022]
Abstract
Recently, we reported that presenilin 1 considerably increased the expression level of U1 small nuclear RNA (snRNA) accompanied with the adverse change of amyloid precursor protein (APP) expression, β-amyloid (Aβ) production and cell apoptosis. In the present study, it was found that U1 snRNA overexpression significantly elevated the expression level of autophagy. Moreover, rapamycin further enhanced the Aβ production and cell apoptosis, whereas these processes were effectively inhibited by 3-MA. Acridine orange staining images showed that U1 snRNA overexpression not only activated autophagy pathway, but also led to the autophagic-lysosomal system dysfunction in cells. Immunofluorescence assay showed autophagic vacuoles localization with APP, which was the precursor protein of main component of toxic protein in AD. Meanwhile, the superoxide dismutase activity was remarkably decreased and MDA level was significantly increased by U1 snRNA overexpression in cells, suggesting that there was a possible pathway to elucidate how the U1 snRNA overexpression induced cell damage. We further found that U1 snRNA overexpression altered lysosomal biogenesis and autophagic-lysosomal fusion. In combination with our previous results, it suggests that the malfunction of autophagy pathway provides important insight into molecular mechanisms of augment the aggregation of Aβ and induction of cell apoptosis contributed to AD.
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15
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Xiao X, Shang X, Zhai B, Zhang H, Zhang T. Nicotine alleviates chronic stress-induced anxiety and depressive-like behavior and hippocampal neuropathology via regulating autophagy signaling. Neurochem Int 2018; 114:58-70. [PMID: 29339018 DOI: 10.1016/j.neuint.2018.01.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 12/13/2017] [Accepted: 01/08/2018] [Indexed: 01/24/2023]
Abstract
Recently, we reported that chronic nicotine significantly improved chronic stress-induced impairments of cognition and the hippocampal synaptic plasticity in mice, however, the underlying mechanism still needs to be explored. In the present study, 32 male C57BL/6 mice were divided into four groups: control (CON), stress (CUS), stress with chronic nicotine administration (CUS + Nic) and chronic nicotine administration (Nic). The anxiety-like behavior and neuropathological alteration of DG neurons were examined. Moreover, PC12 cells were examined with corticosterone in the presence or absence of nicotine. Both cell viability and apoptosis were determined. When treated simultaneously with an unpredictable chronic mild stress (CUS), nicotine (0.2 mg/kg/d) attenuated behavioral deficits and neuropathological alterations of DG neurons. Moreover, Western blotting showed that chronic nicotine also elevated the level of autophagy makers including Beclin-1 and LC3 II triggered by CUS. In addition, concomitant treatment with nicotine (10 μM) significantly attenuated the loss of PC12 cell viability (p < .01) and apoptosis compared to that of corticosterone treatment alone. Besides, chronic nicotine also enhanced the protein and RNA expression levels of autophagy makers triggered by corticosterone, such as Beclin-1, LC3 II and p62/SQSTM1. However, the above improvements were significantly blocked by autophagy inhibitor 3-MA. Importantly, the activation of the PI3K/Akt/mTOR signaling was carefully tested to illuminate the effects of chronic nicotine. Consequently, chronic nicotine played a role of neuroprotection in either CUS mice or corticosterone cells associating with the enhancement of the autophagy signaling, which was involved in activating the PI3K/Akt/mTOR signaling.
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Affiliation(s)
- Xi Xiao
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Xueliang Shang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Baohui Zhai
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Hui Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China
| | - Tao Zhang
- College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071, Tianjin, PR China.
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16
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Li W, Li K, Gao J, Yang Z. Autophagy is required for human umbilical cord mesenchymal stem cells to improve spatial working memory in APP/PS1 transgenic mouse model. Stem Cell Res Ther 2018; 9:9. [PMID: 29335016 PMCID: PMC5769333 DOI: 10.1186/s13287-017-0756-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/29/2017] [Accepted: 12/19/2017] [Indexed: 02/07/2023] Open
Abstract
Background Recent studies have shown that autophagy plays a central role in mesenchymal stem cells (MSCs), and many studies have shown that human umbilical cord MSCs (huMSCs) can treat Alzheimer’s disease (AD) through a variety of mechanisms. However, no studies have looked at the effects of autophagy on neuroprotective function of huMSCs in the AD mouse model. Thus, in this study we investigated whether inhibition of autophagy could weaken or block the function of huMSCs through in vitro and in vivo experiments. Methods In vitro we examined huMSC migration and neuronal differentiation by inhibiting or activating autophagy; in vivo autophagy of huMSCs was inhibited by knocking down Beclin 1, and these huMSCs were transplanted into the APP/PS1 transgenic mouse. A series of related indicators were detected by T-maze task, electrophysiological experiments, immunofluorescence staining, enzyme-linked immunosorbent assay (ELISA), and Western blotting. Results We demonstrated that regulation of autophagy can affect huMSC migration and their neuronal differentiation. Moreover, inhibition of autophagy in huMSCs could not realize neuroprotective effects via anti-apoptosis or promoting neurogenesis and synapse formation compared with those of control huMSCs. Conclusions These findings indicate that autophagy is required for huMSCs to maintain their function and improve cognition impairment in APP/PS1 transgenic mice.
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Affiliation(s)
- Wen Li
- School of Medicine, State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive for Materials Ministry of Education, Nankai University, 94 Weijin Road, Tianjin, 300071, China.,Tianjin Third Central Hospital, Tianjin, 300170, China
| | - Kai Li
- School of Medicine, State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive for Materials Ministry of Education, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Jing Gao
- School of Medicine, State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive for Materials Ministry of Education, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Zhuo Yang
- School of Medicine, State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive for Materials Ministry of Education, Nankai University, 94 Weijin Road, Tianjin, 300071, China.
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17
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Resveratrol attenuates oxidative damage through activating mitophagy in an in vitro model of Alzheimer’s disease. Toxicol Lett 2018; 282:100-108. [DOI: 10.1016/j.toxlet.2017.10.021] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 10/25/2017] [Accepted: 10/26/2017] [Indexed: 11/21/2022]
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18
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Cheng Z, Shang Y, Gao S, Zhang T. Overexpression of U1 snRNA induces decrease of U1 spliceosome function associated with Alzheimer's disease. J Neurogenet 2017; 31:337-343. [PMID: 29098922 DOI: 10.1080/01677063.2017.1395425] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We recently reported that presenilin-1 (PS1) induced an increase of U1 snRNA expression accompanied with the change of amyloid precursor protein expression, β-amyloid level and cell death. In the present study, our data showed that both overexpression and knockdown of U1 snRNA could cause the loss in the function of U1 snRNA and resulted in PCPA as well as the same downstream phenomena including the expression changes of genes specific to AD, tau hyperphosphorylation on the site of Thr212, the decrease of acetylated α-tubulin, the reduction of cell viability and upregulation of RIPK1, RIPK3 and caspase8. These findings not only helped researchers better understand the functions of U1 snRNA, but also paved the way to reveal the mechanisms of AD from a different point of view and may find a new therapeutic target for the disease.
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Affiliation(s)
- Zhi Cheng
- a College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education , Nankai University , Tianjin , PR China
| | - Yingchun Shang
- a College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education , Nankai University , Tianjin , PR China
| | - Shan Gao
- a College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education , Nankai University , Tianjin , PR China
| | - Tao Zhang
- a College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education , Nankai University , Tianjin , PR China
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19
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Angiotensin II induces calcium-mediated autophagy in podocytes through enhancing reactive oxygen species levels. Chem Biol Interact 2017; 277:110-118. [DOI: 10.1016/j.cbi.2017.09.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/25/2017] [Accepted: 09/11/2017] [Indexed: 02/07/2023]
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20
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Xiao X, Zhang H, Wang H, Li Q, Zhang T. Neuroprotective effect of amantadine on corticosterone-induced abnormal glutamatergic synaptic transmission of CA3-CA1 pathway in rat's hippocampal slices. Synapse 2017; 71. [PMID: 28902436 DOI: 10.1002/syn.22010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/04/2017] [Accepted: 09/08/2017] [Indexed: 01/11/2023]
Abstract
Depression is a psychiatric disorder and chronic stress, leading to altered glucocorticoid secretion patterns, is one of the factors that induce depression. Our previous study showed that amantadine significantly attenuated the impairments of synaptic plasticity and cognitive function a rat model of CUS. However, little is known regarding the underlying mechanism. In the present study, the whole-cell patch-clamp technique was applied to examine the protection effect of amantadine on the hippocampus CA3-CA1 pathway. Evoked excitatory postsynaptic currents (eEPSCs), miniature excitatory postsynaptic currents (mEPSCs), paired-pulse ratio (PPR) and the action potentials of CA3 neurons were recorded. Our data showed that corticosterone increased the amplitude of eEPSCs and decreased the value of paired-pulse ratio (PPR), but both of them were significantly reversed by amantadine. In addition, the frequency of mEPSC was considerably increased by corticosterone, but it was reduced by amantadine. Moreover, we used the Fluo-3/AM image to detect the Ca2+ influx in primary cultured hippocampal neurons. The results showed that the intracellular calcium levels were significantly decreased by amantadine in the corticosterone treated neurons. Additionally, the superoxide dismutase (SOD) and catalase (CAT) activities were reduced by corticosterone, while they were enhanced by either amantadine or low-calcium artificial cerebral spinal fluid (ACSF). These results suggest that amantadine significantly improves corticosterone-induced abnormal glutamatergic synaptic transmission of CA3-CA1 synapses presynaptically and alleviates the activities of antioxidant enzymes via regulating the calcium influx.
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Affiliation(s)
- Xi Xiao
- Department of Zoology and Developmental Biology, College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University 300071, Tianjin, People's Republic of China
| | - Hui Zhang
- Department of Zoology and Developmental Biology, College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University 300071, Tianjin, People's Republic of China
| | - Hui Wang
- Department of Zoology and Developmental Biology, College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University 300071, Tianjin, People's Republic of China
| | - Qun Li
- Department of Zoology and Developmental Biology, College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University 300071, Tianjin, People's Republic of China
| | - Tao Zhang
- Department of Zoology and Developmental Biology, College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University 300071, Tianjin, People's Republic of China
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21
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Melamine, beyond the kidney: A ubiquitous endocrine disruptor and neurotoxicant? Toxicol Lett 2017; 280:181-189. [PMID: 28751210 DOI: 10.1016/j.toxlet.2017.07.893] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 06/28/2017] [Accepted: 07/21/2017] [Indexed: 11/22/2022]
Abstract
Melamine is commonly used in a variety of consumer products such as furniture, dining ware, and food utensils. The chemical infamously gained worldwide attention by its illegal addition to a variety of foodstuffs in order to falsify protein content, which led to serious, sometimes fatal, health impacts in children and pets. This resulted in a large amount of published primary studies and reviews of the impacts of melamine exposure on kidney function. However, a growing body of literature suggests that melamine may have impacts beyond renal dysfunction. We conducted a scoping review of this literature which yielded more than 40 studies with human, animal, and in vitro findings. Neurological impacts, reproductive function, and anthropometric outcomes were identified as possible candidates for systematic review based on evidence stream and replication of endpoints. The results of this analysis provide a basis for prioritizing future research on health impacts associated with melamine exposure.
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22
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Zhang C, Li W, Wen J, Yang Z. Autophagy is involved in mouse kidney development and podocyte differentiation regulated by Notch signalling. J Cell Mol Med 2017; 21:1315-1328. [PMID: 28158917 PMCID: PMC5487928 DOI: 10.1111/jcmm.13061] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 11/18/2016] [Indexed: 01/19/2023] Open
Abstract
Podocyte dysfunction results in glomerular diseases accounted for 90% of end-stage kidney disease. The evolutionarily conserved Notch signalling makes a crucial contribution in podocyte development and function. However, the underlying mechanism of Notch pathway modulating podocyte differentiation remains less obvious. Autophagy, reported to be related with Notch signalling pathways in different animal models, is regarded as a possible participant during podocyte differentiation. Here, we found the dynamic changes of Notch1 were coincided with autophagy: they both increased during kidney development and podocyte differentiation. Intriguingly, when Notch signalling was down-regulated by DAPT, autophagy was greatly diminished, and differentiation was also impaired. Further, to better understand the relationship between Notch signalling and autophagy in podocyte differentiation, rapamycin was added to enhance autophagy levels in DAPT-treated cells, and as a result, nephrin was recovered and DAPT-induced injury was ameliorated. Therefore, we put forward that autophagy is involved in kidney development and podocyte differentiation regulated by Notch signalling.
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Affiliation(s)
- Chuyue Zhang
- School of MedicineState Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Bioactive Materials Ministry of EducationNankai UniversityTianjinChina
| | - Wen Li
- School of MedicineState Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Bioactive Materials Ministry of EducationNankai UniversityTianjinChina
| | - Junkai Wen
- School of MedicineState Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Bioactive Materials Ministry of EducationNankai UniversityTianjinChina
| | - Zhuo Yang
- School of MedicineState Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Bioactive Materials Ministry of EducationNankai UniversityTianjinChina
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23
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Autophagy inhibits C2-ceramide-mediated cell death by decreasing the reactive oxygen species levels in SH-SY5Y cells. Neurosci Lett 2017; 651:198-206. [DOI: 10.1016/j.neulet.2017.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 03/02/2017] [Accepted: 03/03/2017] [Indexed: 01/22/2023]
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24
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A Brief Review of Neurotoxicity Induced by Melamine. Neurotox Res 2017; 32:301-309. [DOI: 10.1007/s12640-017-9731-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/26/2017] [Accepted: 04/04/2017] [Indexed: 12/21/2022]
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25
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Zhang YY, Gong JP, Li ZM. Autophagy and hepatic lipid metabolism. Shijie Huaren Xiaohua Zazhi 2017; 25:491-497. [DOI: 10.11569/wcjd.v25.i6.491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Autophagy is initially thought to be a non-selective process in which intracellular proteins or damaged organelles are degraded. It is activated when cells lack nutrients and energy. Autophagy degrades cytoplasmic components within lysosomes and reuses the energy of amino acids to promote cell survival and maintain the cytoplasmic content. Current evidence implicates autophagy in the regulation of lipid stores within the two main organs involved in maintaining lipid homeostasis, the liver and adipose tissue. Upregulation of autophagy may lead to conversion of white adipose tissue into brown adipose tissue, thus regulating energy expenditure and obesity. Discovering new therapeutic interventions to treat lipid and lipoprotein disorders is of great interest and the discovery of autophagy as a regulator of lipid metabolism has opened up a new avenue for this area. In the liver, autophagy can play a role in some common metabolic disorders, which needs further research.
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26
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Nicotine Significantly Improves Chronic Stress-Induced Impairments of Cognition and Synaptic Plasticity in Mice. Mol Neurobiol 2016; 54:4644-4658. [DOI: 10.1007/s12035-016-0012-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 07/03/2016] [Indexed: 12/30/2022]
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Rapamycin Effectively Impedes Melamine-Induced Impairments of Cognition and Synaptic Plasticity in Wistar Rats. Mol Neurobiol 2016; 54:819-832. [DOI: 10.1007/s12035-016-9687-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Accepted: 01/05/2016] [Indexed: 01/07/2023]
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28
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Triptolide Inhibited Cytotoxicity of Differentiated PC12 Cells Induced by Amyloid-Beta₂₅₋₃₅ via the Autophagy Pathway. PLoS One 2015; 10:e0142719. [PMID: 26554937 PMCID: PMC4640509 DOI: 10.1371/journal.pone.0142719] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/26/2015] [Indexed: 01/31/2023] Open
Abstract
Evidence shows that an abnormal deposition of amyloid beta-peptide25–35 (Aβ25–35) was the primary cause of the pathogenesis of Alzheimer’s disease (AD). And the elimination of Aβ25–35 is considered an important target for the treatment of AD. Triptolide (TP), isolated from Tripterygium wilfordii Hook.f. (TWHF), has been shown to possess a broad spectrum of biological profiles, including neurotrophic and neuroprotective effects. In our study investigating the effect and potential mechanism of triptolide on cytotoxicity of differentiated rat pheochromocytoma cell line (the PC12 cell line is often used as a neuronal developmental model) induced by Amyloid-Beta25–35 (Aβ25–35), we used 3-(4, 5-dimethylthiazol-2-yl)-2, 5- diphenyltetrazolium bromide (MTT) assay, flow cytometry, Western blot, and acridine orange staining to detect whether triptolide could inhibit Aβ25–35–induced cell apoptosis. We focused on the potential role of the autophagy pathway in Aβ25–35-treated differentiated PC12 cells. Our experiments show that cell viability is significantly decreased, and the apoptosis increased in Aβ25–35-treated differentiated PC12 cells. Meanwhile, Aβ25–35 treatment increased the expression of microtubule-associated protein light chain 3 II (LC3 II), which indicates an activation of autophagy. However, triptolide could protect differentiated PC12 cells against Aβ25–35-induced cytotoxicity and attenuate Aβ25–35-induced differentiated PC12 cell apoptosis. Triptolide could also suppress the level of autophagy. In order to assess the effect of autophagy on the protective effects of triptolide in differentiated PC12 cells treated with Aβ25–35, we used 3-Methyladenine (3-MA, an autophagy inhibitor) and rapamycin (an autophagy activator). MTT assay showed that 3-MA elevated cell viability compared with the Aβ25–35-treated group and rapamycin inhibits the protection of triptolide. These results suggest that triptolide will repair the neurological damage in AD caused by deposition of Aβ25–35 via the autophagy pathway, all of which may provide an exciting view of the potential application of triptolide or TWHF as a future research for AD.
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Melamine Alters Glutamatergic Synaptic Transmission of CA3-CA1 Synapses Presynaptically Through Autophagy Activation in the Rat Hippocampus. Neurotox Res 2015; 29:135-42. [PMID: 26530910 DOI: 10.1007/s12640-015-9570-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 10/21/2015] [Accepted: 10/24/2015] [Indexed: 10/22/2022]
Abstract
Melamine is an industrial chemical that can cause central nervous system disorders including excitotoxicity and cognitive impairment. Its illegal use in powdered baby formula was the focus of a milk scandal in China in 2008. One of our previous studies showed that melamine impaired glutamatergic transmission in rat hippocampal CA1 pyramidal cells. However, the underlying mechanism of action of melamine is unclear, and it is unknown if the CA3-CA1 pathway is directly involved. In the present study, a whole-cell patch-clamp technique was employed to investigate the effect of melamine on the hippocampal CA3-CA1 pathway in vitro. Both the evoked excitatory postsynaptic current (eEPSC) and the paired-pulse ratio (PPR) were recorded. Furthermore, we examined whether autophagy was involved in glutamatergic transmission alterations induced by melamine. Our data showed that melamine significantly increased the amplitude of eEPSCs in a dose-dependent manner. Inhibition of the N-methyl-D-aspartic acid receptor did not prevent the increase in eEPSC amplitude. In addition, the PPR was remarkably decreased by a melamine concentration of 5 × 10(-5) g/mL. It was found that autophagy could be activated by melamine and an autophagy inhibitor, 3-MA, prevented the melamine-induced increase in eEPSC amplitude. Overall, our results show that melamine presynaptically alters glutamatergic synaptic transmission of hippocampal CA3-CA1 synapses in vitro and this is likely associated with autophagy alteration.
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30
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Dai C, Tang S, Velkov T, Xiao X. Colistin-Induced Apoptosis of Neuroblastoma-2a Cells Involves the Generation of Reactive Oxygen Species, Mitochondrial Dysfunction, and Autophagy. Mol Neurobiol 2015; 53:4685-700. [PMID: 26316077 DOI: 10.1007/s12035-015-9396-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 08/11/2015] [Indexed: 12/22/2022]
Abstract
Neurotoxicity remains a poorly characterized adverse effect associated with colistin therapy. The aim of the present study was to investigate the mechanism of colistin-induced neurotoxicity using the mouse neuroblastoma2a (N2a) cell line. Colistin treatment (0-200 μM) of N2a neuronal cells induced apoptotic cell death in a dose-dependent manner. Colistin-induced neurotoxicity was associated with a significant increase of reactive oxygen species (ROS) levels, with a concomitant decrease in the activities of superoxide dismutase (SOD), catalase (CAT), and the glutathione (GSH) levels. Mitochondrial dysfunction was evident from the dissipation of membrane potential and the increase of Bax/Bcl-2, followed by the release of cytochrome c (CytC). Caspase-3/7, -8, and -9 activations were also detected. Colistin-induced neurotoxicity significantly increased the gene expression of p53 (1.6-fold), Bax (3.3-fold), and caspase-8 (2.2-fold) (all p < 0.01). The formation of autophagic vacuoles was evident with the significant increases (all p < 0.05 or 0.01) of both of Beclin 1 and LC3B following colistin treatment (50-200 μM). Furthermore, inhibition of autophagy by pretreatment with chloroquine diphosphate (CQ) enhanced colistin-induced apoptosis via caspase activation, which could be attenuated by co-treatment with the pan-caspase inhibitor Z-VAD-FMK. In summary, our study reveals that colistin-induced neuronal cell death involves ROS-mediated oxidative stress and mitochondrial dysfunction, followed by caspase-dependent apoptosis and autophagy. A knowledge base of the neuronal signaling pathways involved in colistin-induced neurotoxicity will greatly facilitate the discovery of neuroprotective agents for use in combination with colistin to prevent this undesirable side effect.
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Affiliation(s)
- Chongshan Dai
- College of Veterinary Medicine, China Agricultural University, 2 Yuanmingyuan West Road, Beijing, 100193, People's Republic of China
| | - Shusheng Tang
- College of Veterinary Medicine, China Agricultural University, 2 Yuanmingyuan West Road, Beijing, 100193, People's Republic of China
| | - Tony Velkov
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria, 3052, Australia.
| | - Xilong Xiao
- College of Veterinary Medicine, China Agricultural University, 2 Yuanmingyuan West Road, Beijing, 100193, People's Republic of China.
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