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Guo Z, Yang Y, Li L, Zhao Q, Li Y, Liu Z, Hao L, Guo B, Diao A. The novel prolyl hydroxylase-2 inhibitor caffeic acid upregulates hypoxia inducible factor and protects against hypoxia. Eur J Pharmacol 2022; 934:175307. [DOI: 10.1016/j.ejphar.2022.175307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 11/26/2022]
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2
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Lu N, Bai R, Liu B, Cheng W, Wu Z. Attenuation of the cytoprotection induced by hypoxic preconditioning upon transfection with BNIP3-siRNA in human neuroblastoma SH-SY5Y cells. Int J Neurosci 2021:1-10. [PMID: 34871150 DOI: 10.1080/00207454.2021.2015349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE The aim of this study was to investigate the functional role of hypoxic preconditioning (HPC) in human neuroblastoma cells. METHODS BNIP3 small-interfering RNA (BNIP3-siRNA) sequence was synthesized and used to transfect human neuroblastoma SH-SY5Y cell lines. Thereafter, BNIP3 expression at mRNA and protein levels and its effects on the cell proliferation were analyzed. The most effective pair of siRNA was selected to knockdown the expression level of BNIP3. Moreover, the effects of HPC on oxygen-glucose deprivation/reperfusion (OGD/R)-induced apoptosis and autophagy in SH-SY5Y cells were explored to further reveal the possible mechanisms underlying HPC. RESULTS BNIP3-siRNA attenuated the protective effects of HPC by decreasing the cell viability, increasing the enzymatic activity of caspase-3 and 9, increasing the rate of apoptosis, and increasing the protein expression level of activated caspase-3. Additionally, BNIP3-siRNA had no significant influence on the expression level of HIF-1α induced by HPC, while it substantially inhibited HPC-induced BNIP3/Beclin1 and autophagy. CONCLUSIONS HPC promoted autophagy through regulating BNIP3 to reduce OGD/R.
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Affiliation(s)
- Na Lu
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Ruiying Bai
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Bo Liu
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Weijia Cheng
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Zekun Wu
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
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Lu N, Li X, Tan R, An J, Cai Z, Hu X, Wang F, Wang H, Lu C, Lu H. HIF-1α/Beclin1-Mediated Autophagy Is Involved in Neuroprotection Induced by Hypoxic Preconditioning. J Mol Neurosci 2018; 66:238-250. [PMID: 30203298 PMCID: PMC6182618 DOI: 10.1007/s12031-018-1162-7] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 08/20/2018] [Indexed: 02/07/2023]
Abstract
Hypoxic preconditioning (HPC) exerts a protective effect against hypoxic/ischemic brain injury, and one mechanism explaining this effect may involve the upregulation of hypoxia-inducible factor-1 (HIF-1). Autophagy, an endogenous protective mechanism against hypoxic/ischemic injury, is correlated with the activation of the HIF-1α/Beclin1 signaling pathway. Based on previous studies, we hypothesize that the protective role of HPC may involve autophagy occurring via activation of the HIF-1α/Beclin1 signaling pathway. To test this hypothesis, we evaluated the effects of HPC on oxygen-glucose deprivation/reperfusion (OGD/R)-induced apoptosis and autophagy in SH-SY5Y cells. HPC significantly attenuated OGD/R-induced apoptosis, and this effect was suppressed by the autophagy inhibitor 3-methyladenine and mimicked by the autophagy agonist rapamycin. In control SH-SY5Y cells, HPC upregulated the expression of HIF-1α and downstream molecules such as BNIP3 and Beclin1. Additionally, HPC increased the LC3-II/LC3-I ratio and decreased p62 levels. The increase in the LC3-II/LC3-I ratio was inhibited by the HIF-1α inhibitor YC-1 or by Beclin1-short hairpin RNA (shRNA). In OGD/R-treated SH-SY5Y cells, HPC also upregulated the expression levels of HIF-1α, BNIP3, and Beclin1, as well as the LC3-II/LC3-I ratio. Furthermore, YC-1 or Beclin1-shRNA attenuated the HPC-mediated cell viability in OGD/R-treated cells. Taken together, our results demonstrate that HPC protects SH-SY5Y cells against OGD/R via HIF-1α/Beclin1-regulated autophagy.
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Affiliation(s)
- Na Lu
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Xingxing Li
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Ruolan Tan
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Jing An
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Zhenlu Cai
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Xiaoxuan Hu
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Feidi Wang
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Haoruo Wang
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Chengbiao Lu
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Haixia Lu
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China.
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4
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Tan X, Azad S, Ji X. Hypoxic Preconditioning Protects SH-SY5Y Cell against Oxidative Stress through Activation of Autophagy. Cell Transplant 2018; 27:1753-1762. [PMID: 29871517 PMCID: PMC6300772 DOI: 10.1177/0963689718760486] [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] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress plays a role in many neurological diseases. Hypoxic preconditioning (HPC) has been proposed as an intervention that protects neurons from damage by altering their response to oxidative stress. The aim of this study was to investigate the mechanisms by which HPC results in neuroprotection in cultured SH-SY5Y cells subjected to oxidative stress to provide a guide for future investigation and targeted interventions. SH-SY5Y cells were subjected to HPC protocols or control conditions. Oxidative stress was induced by H2O2. Cell viability was determined via adenosine triphosphate assay. Rapamycin and 3-methyxanthine (3-MA) were used to induce and inhibit autophagy, respectively. Monodansylcadaverine staining was used to observe the formation of autophagosomes. Levels of Microtubule-associated protein light chain 3 B (LC3B), Beclin 1, and p53 were measured by Western blot. Reactive oxygen species (ROS) were also determined. Cell viability in the HPC group following 24-h exposure to 600 μM H2O2 was 65.04 ± 12.91% versus 33.14 ± 5.55% in the control group. LC3B, Beclin 1, and autophagosomes were increased in the HPC group compared with controls. Rapamycin mimicked the protection and 3-MA decreased the protection. There was a moderate increase in ROS after HPC, but rapamycin can abolish the increase and 3-MA can enhance the increase. p53 accumulated in a manner consistent with cell death, and HPC-treated cells showed reduced accumulation of p53 as compared with controls. Treatment with rapamycin decreased p53 accumulation, and 3-MA inhibited the decrease in p53 induced by HPC. HPC protects against oxidative stress in SH-SY5Y cells. Mechanisms of protection may involve the activation of autophagy induced by ROS generated from HPC and the following decline in p53 level caused by activated autophagy in oxidative stress state. This is in line with recent findings in nonneuronal cell populations and may represent an important advance in understanding how HPC protects neurons from oxidative stress.
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Affiliation(s)
- Xiaomu Tan
- 1 Beijing Key Laboratory of Hypoxia Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.,2 Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China.,3 Department of Neurology, Beijing Luhe Hospital, Capital Medical University, Beijing, China
| | - Sherwin Azad
- 4 Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, USA
| | - Xunming Ji
- 2 Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
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Lv J, Liang Y, Tu Y, Chen J, Xie Y. Hypoxic preconditioning reduces propofol-induced neuroapoptosis via regulation of Bcl-2 and Bax and downregulation of activated caspase-3 in the hippocampus of neonatal rats. Neurol Res 2018; 40:767-773. [PMID: 29790425 DOI: 10.1080/01616412.2018.1477545] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Evidence has shown that propofol may cause widespread apoptotic neurodegeneration. Hypoxic preconditioning (HPC) was previously demonstrated to provide neuroprotection and brain recovery from either acute or chronic neurodegeneration in several cellular and animal models. Therefore, the present study was designed to investigate the protective effects of hypoxic preconditioning on apoptosis caused by propofol in neonatal rats. METHODS Propofol (100 mg/kg) was given to 7-day-old (P7) Sprague Dawley pups. Before the propofol injection, hypoxic preconditioning was administered by subjecting rats to five cycles of 10 min of hypoxia (8% O2) and 10 min of normoxia (21% O2), then 2 h of room air. We detected neuronal structure changes and apoptosis by hematoxylin and eosin (HE) staining and TUNEL assay, respectively. Bcl-2, Bax and cleaved-caspase-3 levels were quantified using Western blotting and immunohistochemistry. RESULT After treatment with propofol, Bcl-2 levels decreased and Bax and cleaved-caspase-3 levels increased. However, our results suggest that hypoxic preconditioning could reverse this change. Conclusion: Our results indicate that pretreatment with hypoxic preconditioning prevents propofol-induced neuroapoptosis by increasing the levels of Bcl-2 and decreasing the levels of Bax and cleaved-caspase-3.
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Affiliation(s)
- Jing Lv
- a Department of Anesthesiology , The First Affiliated Hospital of Guangxi Medical University , Nanning , China
| | - Yubing Liang
- b Department of Anesthesiology , The Affiliated tumor hospital of Guangxi Medical University , Nanning , China
| | - Youbing Tu
- a Department of Anesthesiology , The First Affiliated Hospital of Guangxi Medical University , Nanning , China
| | - Jing Chen
- a Department of Anesthesiology , The First Affiliated Hospital of Guangxi Medical University , Nanning , China
| | - Yubo Xie
- a Department of Anesthesiology , The First Affiliated Hospital of Guangxi Medical University , Nanning , China
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Hong-Brown LQ, Brown CR, Navaratnarajah M, Lang CH. FoxO1-AMPK-ULK1 Regulates Ethanol-Induced Autophagy in Muscle by Enhanced ATG14 Association with the BECN1-PIK3C3 Complex. Alcohol Clin Exp Res 2017; 41:895-910. [PMID: 28299793 PMCID: PMC5404978 DOI: 10.1111/acer.13377] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 03/10/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Excessive alcohol (EtOH) consumption causes an imbalance in protein metabolism. EtOH impairs protein synthesis in C2C12 myoblasts via a FoxO1-AMPK-TSC2-mTORC1 pathway and also induces protein degradation. As the underlying regulatory signaling cascades for these processes are currently poorly defined, we tested the hypothesis that alcohol-induced autophagy is mediated via activation of the PIK3C3 complex that is regulated by FoxO1-AMPK. METHODS C2C12 myoblasts were incubated with EtOH for various periods of time, and autophagy pathway-related proteins were assessed by Western blotting and immunoprecipitation. Expression of targeted genes was suppressed using electroporation of specific siRNAs and chemical inhibitors. RESULTS Incubation of C2C12 myoblasts with 100 mM EtOH increased the autophagy markers LC3B-II and ATG7, whereas levels of SQSTM1/p62 decreased. The lysosomal inhibitor bafilomycin A1 caused a similar response, although there was no additive effect when combined with EtOH. EtOH altered ULK1 S555 and S757 phosphorylation in a time- and AMPK-dependent manner. The activation of AMPK and ULK1 was associated with increased BECN1 (S93, S14) and PIK3C3/VPS34 (S164) phosphorylation as well as increased total ATG14 and PIK3C3. These changes promoted formation of the ATG14-AMBRA1-BECN1-PIK3C3 proautophagy complex that is important in autophagosome formation. EtOH-induced changes were not associated with increased production of PtdIns3P, which may be due to enhanced PIK3C3 complex binding with 14-3-3θ. Reduction of AMPK using siRNA suppressed the stimulatory effect of EtOH on BECN1 S93, BECN1 S14, and PIK3C3 S164 phosphorylation in a time-dependent manner. Likewise, knockdown of AMPK or chemical inhibition of FoxO1 attenuated phosphorylation of ULK1 at both residues. Knockdown of ULK1 or BECN1 antagonized the effect of EtOH on LC3B-II, SQSTM1, and ATG7 protein expression. CONCLUSIONS EtOH-induced autophagy is mediated through changes in phosphorylation and interaction of various PIK3C3 complex components. This, in turn, is regulated either directly via FoxO1-AMPK or indirectly via the FoxO1-AMPK-ULK1 signaling cascade in a mTORC1-independent or mTORC1-dependent manner.
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Affiliation(s)
- Ly Q. Hong-Brown
- Department of Cellular and Molecular Physiology, Penn State College of Medicine, Hershey, PA 17033
| | - C. Randell Brown
- Department of Cellular and Molecular Physiology, Penn State College of Medicine, Hershey, PA 17033
| | - Maithili Navaratnarajah
- Department of Cellular and Molecular Physiology, Penn State College of Medicine, Hershey, PA 17033
| | - Charles H. Lang
- Department of Cellular and Molecular Physiology, Penn State College of Medicine, Hershey, PA 17033
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7
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Zhang Z, Yang C, Shen M, Yang M, Jin Z, Ding L, Jiang W, Yang J, Chen H, Cao F, Hu T. Autophagy mediates the beneficial effect of hypoxic preconditioning on bone marrow mesenchymal stem cells for the therapy of myocardial infarction. Stem Cell Res Ther 2017; 8:89. [PMID: 28420436 PMCID: PMC5395756 DOI: 10.1186/s13287-017-0543-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/04/2017] [Accepted: 03/23/2017] [Indexed: 12/12/2022] Open
Abstract
Background Stem cell therapy has emerged as a promising therapeutic strategy for myocardial infarction (MI). However, the poor viability of transplanted stem cells hampers their therapeutic efficacy. Hypoxic preconditioning (HPC) can effectively promote the survival of stem cells. The aim of this study was to investigate whether HPC improved the functional survival of bone marrow mesenchymal stem cells (BM-MSCs) and increased their cardiac protective effect. Methods BM-MSCs, isolated from Tg(Fluc-egfp) mice which constitutively express both firefly luciferase (Fluc) and enhanced green fluorescent protein (eGFP), were preconditioned with HPC (1% O2) for 12 h, 24 h, 36 h, and 48 h, respectively, followed by 24 h of hypoxia and serum deprivation (H/SD) injury. Results HPC dose-dependently increased the autophagy in BM-MSCs. However, the protective effects of HPC for 24 h are most pronounced. Moreover, hypoxic preconditioned BM-MSCs (HPCMSCs) and nonhypoxic preconditioned BM-MSCs (NPCMSCs) were transplanted into infarcted hearts. Longitudinal in vivo bioluminescence imaging (BLI) and immunofluorescent staining revealed that HPC enhanced the survival of engrafted BM-MSCs. Furthermore, HPCMSCs significantly reduced fibrosis, decreased apoptotic cardiomyocytes, and preserved heart function. However, the beneficial effect of HPC was abolished by autophagy inhibition with 3-methyladenine (3-MA) and Atg7siRNA. Conclusion This study demonstrates that HPC may improve the functional survival and the therapeutic efficiencies of engrafted BM-MSCs, at least in part through autophagy regulation. Hypoxic preconditioning may serve as a promising strategy for optimizing cell-based cardiac regenerative therapy. Electronic supplementary material The online version of this article (doi:10.1186/s13287-017-0543-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zheng Zhang
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Chao Yang
- Department of Blood Transfusion, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Mingzhi Shen
- Department of Cardiology, Hainan Branch of PLA General Hospital, Sanya, 572013, China
| | - Ming Yang
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 201306, China.,School of Basic Medical Sciences, Taishan Medical University, Taian, Shandong, 271000, China
| | - Zhitao Jin
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Liping Ding
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Wei Jiang
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Junke Yang
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Haixu Chen
- Core Laboratory of Translational Medicine, Institute of Geriatrics, PLA general Hospital, Beijing, 100853, China
| | - Feng Cao
- Department of Cardiology, The General Hospital of Chinese People's Liberation Army, Beijing, 100853, China.
| | - Taohong Hu
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China.
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8
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Girault V, Gilard V, Marguet F, Lesueur C, Hauchecorne M, Ramdani Y, Laquerrière A, Marret S, Jégou S, Gonzalez BJ, Brasse-Lagnel C, Bekri S. Prenatal alcohol exposure impairs autophagy in neonatal brain cortical microvessels. Cell Death Dis 2017; 8:e2610. [PMID: 28182007 PMCID: PMC5386476 DOI: 10.1038/cddis.2017.29] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 12/31/2016] [Accepted: 01/10/2017] [Indexed: 02/06/2023]
Abstract
Brain developmental lesions are a devastating consequence of prenatal alcohol exposure (PAE). We recently showed that PAE affects cortical vascular development with major effects on angiogenesis and endothelial cell survival. The underlying molecular mechanisms of these effects remain poorly understood. This study aimed at characterizing the ethanol exposure impact on the autophagic process in brain microvessels in human fetuses with fetal alcohol syndrome (FAS) and in a PAE mouse model. Our results indicate that PAE induces an increase of autophagic vacuole number in human fetal and neonatal mouse brain cortical microvessels. Subsequently, ex vivo studies using green fluorescent protein (GFP)-LC3 mouse microvessel preparations revealed that ethanol treatment alters autophagy in endothelial cells. Primary cultures of mouse brain microvascular endothelial cells were used to characterize the underlying molecular mechanisms. LC3 and p62 protein levels were significantly increased in endothelial cells treated with 50 mM ethanol. The increase of autophagic vacuole number may be due to excessive autophagosome formation associated with the partial inhibition of the mammalian target of rapamycin pathway upon ethanol exposure. In addition, the progression from autophagosomes to autolysosomes, which was monitored using autophagic flux inhibitors and mRFP-EGFP vector, showed a decrease in the autolysosome number. Besides, a decrease in the Rab7 protein level was observed that may underlie the impairment of autophagosome-lysosome fusion. In addition, our results showed that ethanol-induced cell death is likely to be mediated by decreased mitochondrial integrity and release of apoptosis-inducing factor. Interestingly, incubation of cultured cells with rapamycin prevented ethanol effects on autophagic flux, ethanol-induced cell death and vascular plasticity. Taken together, these results are consistent with autophagy dysregulation in cortical microvessels upon ethanol exposure, which could contribute to the defects in angiogenesis observed in patients with FAS. Moreover, our results suggest that rapamycin represents a potential therapeutic strategy to reduce PAE-related brain developmental disorders.
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Affiliation(s)
- Virginie Girault
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
| | - Vianney Gilard
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
- Department of Neurosurgery, Rouen University Hospital, Rouen, France
| | - Florent Marguet
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
- Pathology Laboratory, Rouen University Hospital, Rouen, France
| | - Céline Lesueur
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
- Department of Metabolic Biochemistry, Rouen University Hospital, Rouen, France
| | | | - Yasmina Ramdani
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
| | - Annie Laquerrière
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
- Pathology Laboratory, Rouen University Hospital, Rouen, France
| | - Stéphane Marret
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
- Department of Neonatal Pediatrics and Intensive Care and Neuropediatrics, Rouen University Hospital, Rouen, France
| | - Sylvie Jégou
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
| | | | | | - Soumeya Bekri
- Normandie University, UNIROUEN, INSERM U1245, NeoVasc Team, Rouen, France
- Department of Metabolic Biochemistry, Rouen University Hospital, Rouen, France
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9
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Galluzzi L, Bravo-San Pedro JM, Blomgren K, Kroemer G. Autophagy in acute brain injury. Nat Rev Neurosci 2016; 17:467-84. [PMID: 27256553 DOI: 10.1038/nrn.2016.51] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Autophagy is an evolutionarily ancient mechanism that ensures the lysosomal degradation of old, supernumerary or ectopic cytoplasmic entities. Most eukaryotic cells, including neurons, rely on proficient autophagic responses for the maintenance of homeostasis in response to stress. Accordingly, autophagy mediates neuroprotective effects following some forms of acute brain damage, including methamphetamine intoxication, spinal cord injury and subarachnoid haemorrhage. In some other circumstances, however, the autophagic machinery precipitates a peculiar form of cell death (known as autosis) that contributes to the aetiology of other types of acute brain damage, such as neonatal asphyxia. Here, we dissect the context-specific impact of autophagy on non-infectious acute brain injury, emphasizing the possible therapeutic application of pharmacological activators and inhibitors of this catabolic process for neuroprotection.
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Affiliation(s)
- Lorenzo Galluzzi
- Equipe 11 Labellisée Ligue Contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France.,INSERM, U1138, 75006 Paris, France.,Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France.,Université Pierre et Marie Curie/Paris VI, 75006 Paris, France.,Gustave Roussy Comprehensive Cancer Institute, 94805 Villejuif, France
| | - José Manuel Bravo-San Pedro
- Equipe 11 Labellisée Ligue Contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France.,INSERM, U1138, 75006 Paris, France.,Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France.,Université Pierre et Marie Curie/Paris VI, 75006 Paris, France.,Gustave Roussy Comprehensive Cancer Institute, 94805 Villejuif, France
| | - Klas Blomgren
- Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital Q2:07, 17176 Stockholm, Sweden
| | - Guido Kroemer
- Equipe 11 Labellisée Ligue Contre le Cancer, Centre de Recherche des Cordeliers, 75006 Paris, France.,INSERM, U1138, 75006 Paris, France.,Université Paris Descartes/Paris V, Sorbonne Paris Cité, 75006 Paris, France.,Université Pierre et Marie Curie/Paris VI, 75006 Paris, France.,Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital Q2:07, 17176 Stockholm, Sweden.,Metabolomics and Cell Biology Platforms, Gustave Roussy Comprehensive Cancer Institute, 94805 Villejuif, France.,Pôle de Biologie, Hopitâl Européen George Pompidou, AP-HP, 75015 Paris, France
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10
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De Filippis L, Halikere A, McGowan H, Moore JC, Tischfield JA, Hart RP, Pang ZP. Ethanol-mediated activation of the NLRP3 inflammasome in iPS cells and iPS cells-derived neural progenitor cells. Mol Brain 2016; 9:51. [PMID: 27160314 PMCID: PMC4862119 DOI: 10.1186/s13041-016-0221-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 04/08/2016] [Indexed: 12/19/2022] Open
Abstract
Background Alcohol abuse produces an enormous impact on health, society, and the economy. Currently, there are very limited therapies available, largely due to the poor understanding of mechanisms underlying alcohol use disorders (AUDs) in humans. Oxidative damage of mitochondria and cellular proteins aggravates the progression of neuroinflammation and neurological disorders initiated by alcohol abuse. Results Here we show that ethanol exposure causes neuroinflammation in both human induced pluripotent stem (iPS) cells and human neural progenitor cells (NPCs). Ethanol exposure for 24 hours or 7 days does not affect the proliferation of iPS cells and NPCs, but primes an innate immune-like response by activating the NLR family pyrin domain containing 3 (NLRP3) inflammasome pathway. This leads to an increase of microtubule-associated protein 1A/1B-light chain 3+ (LC3B+) autophagic puncta and impairment of the mitochondrial and lysosomal distribution. In addition, a decrease of mature neurons derived from differentiating NPCs is evident in ethanol pre-exposed compared to control NPCs. Moreover, a second insult of a pro-inflammatory factor in addition to ethanol preexposure enhances innate cellular inflammation in human iPS cells. Conclusions This study provides strong evidence that neuronal inflammation contributes to the pathophysiology of AUDs through the activation of the inflammasome pathway in human cellular models.
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Affiliation(s)
- Lidia De Filippis
- Child Health Institute of New Jersey, Rutgers University-Robert Wood Johnson Medical School, room 3233D, 89 French Street, New Brunswick, NJ, 08901, USA. .,Department of Neuroscience and Cell Biology, Rutgers University-Robert Wood Johnson Medical School, room 3233D, 89 French Street, New Brunswick, NJ, 08901, USA.
| | - Apoorva Halikere
- Child Health Institute of New Jersey, Rutgers University-Robert Wood Johnson Medical School, room 3233D, 89 French Street, New Brunswick, NJ, 08901, USA.,Department of Neuroscience and Cell Biology, Rutgers University-Robert Wood Johnson Medical School, room 3233D, 89 French Street, New Brunswick, NJ, 08901, USA
| | - Heather McGowan
- Child Health Institute of New Jersey, Rutgers University-Robert Wood Johnson Medical School, room 3233D, 89 French Street, New Brunswick, NJ, 08901, USA.,Department of Neuroscience and Cell Biology, Rutgers University-Robert Wood Johnson Medical School, room 3233D, 89 French Street, New Brunswick, NJ, 08901, USA
| | - Jennifer C Moore
- Department of Genetics, Rutgers University, Piscataway, 08854, USA.,Human Genetic Institute of New Jersey, Rutgers University, Piscataway, 08854, USA
| | - Jay A Tischfield
- Department of Genetics, Rutgers University, Piscataway, 08854, USA.,Human Genetic Institute of New Jersey, Rutgers University, Piscataway, 08854, USA
| | - Ronald P Hart
- Human Genetic Institute of New Jersey, Rutgers University, Piscataway, 08854, USA.,Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, 08854, USA
| | - Zhiping P Pang
- Child Health Institute of New Jersey, Rutgers University-Robert Wood Johnson Medical School, room 3233D, 89 French Street, New Brunswick, NJ, 08901, USA. .,Department of Neuroscience and Cell Biology, Rutgers University-Robert Wood Johnson Medical School, room 3233D, 89 French Street, New Brunswick, NJ, 08901, USA.
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Abstract
Excessive ethanol exposure is detrimental to the brain. The developing brain is particularly vulnerable to ethanol such that prenatal ethanol exposure causes fetal alcohol spectrum disorders (FASD). Neuronal loss in the brain is the most devastating consequence and is associated with mental retardation and other behavioral deficits observed in FASD. Since alcohol consumption during pregnancy has not declined, it is imperative to elucidate the underlying mechanisms and develop effective therapeutic strategies. One cellular mechanism that acts as a protective response for the central nervous system (CNS) is autophagy. Autophagy regulates lysosomal turnover of organelles and proteins within cells, and is involved in cell differentiation, survival, metabolism, and immunity. We have recently shown that ethanol activates autophagy in the developing brain. The autophagic preconditioning alleviates ethanol-induced neuron apoptosis, whereas inhibition of autophagy potentiates ethanol-stimulated reactive oxygen species (ROS) and exacerbates ethanol-induced neuroapoptosis. The expression of genes encoding proteins required for autophagy in the CNS is developmentally regulated; their levels are much lower during an ethanol-sensitive period than during an ethanol-resistant period. Ethanol may stimulate autophagy through multiple mechanisms; these include induction of oxidative stress and endoplasmic reticulum stress, modulation of MTOR and AMPK signaling, alterations in BCL2 family proteins, and disruption of intracellular calcium (Ca2+) homeostasis. This review discusses the most recent evidence regarding the involvement of autophagy in ethanol-mediated neurotoxicity as well as the potential therapeutic approach of targeting autophagic pathways.
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Key Words
- AD, Alzheimer disease
- ALS, autophagy-lysosome system
- AMPK, adenosine 5′-monophosphate-activated protein kinase;
- ATG, autophagy-related
- CNS, central nervous system
- ER, endoplasmic reticulum
- FASD, fetal alcohol spectrum disorders
- FOXO3, forkhead box O3
- GSK3B, glycogen synthase kinase 3 β
- HD, Huntington disease, HNSCs, hippocampal neural stem cells
- LC3, microtubule-associated protein 1 light chain 3
- MTOR, mechanistic target of rapamycin (serine/threonine kinase)
- MTORC1, MTOR complex 1
- NFE2L2, nuclear factor, erythroid 2-like 2
- NOX, NADPH oxidase
- PD, Parkinson disease
- PI3K, class I phosphoinositide 3-kinase
- ROS, reactive oxygen species
- SQSTM1/p62, sequestosome 1
- TSC1/2, tuberous sclerosis 1/ 2
- UPR, unfolded protein response
- alcohol
- alcoholism
- development
- fetal alcohol spectrum disorders
- neurodegeneration
- oxidative stress
- protein degradation
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Affiliation(s)
- Jia Luo
- a Department of Pharmacology and Nutritional Sciences ; University of Kentucky College of Medicine ; Lexington , KY USA
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Yang JY, Xue X, Tian H, Wang XX, Dong YX, Wang F, Zhao YN, Yao XC, Cui W, Wu CF. Role of microglia in ethanol-induced neurodegenerative disease: Pathological and behavioral dysfunction at different developmental stages. Pharmacol Ther 2014; 144:321-37. [DOI: 10.1016/j.pharmthera.2014.07.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 07/03/2014] [Indexed: 01/04/2023]
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Autophagy in alcohol-induced multiorgan injury: mechanisms and potential therapeutic targets. BIOMED RESEARCH INTERNATIONAL 2014; 2014:498491. [PMID: 25140315 PMCID: PMC4124834 DOI: 10.1155/2014/498491] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Accepted: 06/29/2014] [Indexed: 12/21/2022]
Abstract
Autophagy is a genetically programmed, evolutionarily conserved intracellular degradation pathway involved in the trafficking of long-lived proteins and cellular organelles to the lysosome for degradation to maintain cellular homeostasis. Alcohol consumption leads to injury in various tissues and organs including liver, pancreas, heart, brain, and muscle. Emerging evidence suggests that autophagy is involved in alcohol-induced tissue injury. Autophagy serves as a cellular protective mechanism against alcohol-induced tissue injury in most tissues but could be detrimental in heart and muscle. This review summarizes current knowledge about the role of autophagy in alcohol-induced injury in different tissues/organs and its potential molecular mechanisms as well as possible therapeutic targets based on modulation of autophagy.
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Alimov A, Wang H, Liu M, Frank JA, Xu M, Ou X, Luo J. Expression of autophagy and UPR genes in the developing brain during ethanol-sensitive and resistant periods. Metab Brain Dis 2013; 28:667-76. [PMID: 23979425 PMCID: PMC3809151 DOI: 10.1007/s11011-013-9430-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 08/13/2013] [Indexed: 12/23/2022]
Abstract
Fetal alcohol spectrum disorders (FASD) results from ethanol exposure to the developing fetus and is the leading cause of mental retardation. FASD is associated with a broad range of neurobehavioral deficits which may be mediated by ethanol-induced neurodegeneration in the developing brain. An immature brain is more susceptible to ethanol neurotoxicity. We hypothesize that the enhanced sensitivity of the immature brain to ethanol is due to a limited capacity to alleviate cellular stress. Using a third trimester equivalent mouse model of ethanol exposure, we demonstrated that subcutaneous injection of ethanol induced a wide-spread neuroapoptosis in postnatal day 4 (PD4) C57BL/6 mice, but had little effect on the brain of PD12 mice. We analyzed the expression profile of genes regulating apoptosis, and the pathways of ER stress response (also known as unfolded protein response, UPR) and autophagy during these ethanol-sensitive and resistant periods (PD4 versus PD12) using PCR microarray. The expression of pro-apoptotic genes, such as caspase-3, was much higher on PD4 than PD12; in contrast, the expression of genes that regulate UPR and autophagy, such as atf6, atg4, atg9, atg10, beclin1, bnip3, cebpb, ctsb, ctsd, ctss, grp78, ire1α, lamp, lc3 perk, pik3c3, and sqstm1 was significantly higher on PD12 than PD4. These results suggest that the vulnerability of the immature brain to ethanol could result from high expression of pro-apoptotic proteins and a deficiency in the stress responsive system, such as UPR and autophagy.
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Affiliation(s)
- Alexander Alimov
- Department of Molecular and Biochemical Pharmacology, University of Kentucky College of Medicine, Lexington, KY 40536, USA
| | - Haiping Wang
- Department of Molecular and Biochemical Pharmacology, University of Kentucky College of Medicine, Lexington, KY 40536, USA
| | - Mei Liu
- Department of Anatomy and Neurobiology, University of Kentucky College of Medicine, Lexington, KY 40536, USA
| | - Jacqueline A. Frank
- Department of Molecular and Biochemical Pharmacology, University of Kentucky College of Medicine, Lexington, KY 40536, USA
| | - Mei Xu
- Department of Molecular and Biochemical Pharmacology, University of Kentucky College of Medicine, Lexington, KY 40536, USA
| | - Xiaoming Ou
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, Mississippi 39216, USA
| | - Jia Luo
- Department of Molecular and Biochemical Pharmacology, University of Kentucky College of Medicine, Lexington, KY 40536, USA
- Correspondence author: Dr. Jia Luo, Department of Molecular and Biochemical Pharmacology, University of Kentucky College of Medicine, 132 Health Sciences Research Building, 1095 Veterans Drive, Lexington, Kentucky 40536. ; Tel: 859-323-3036; Fax: 859-257-0199
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