1
|
Ding X, Cao S, Wang Q, Du B, Lu K, Qi S, Cheng Y, Tuo Q, Liang W, Lei P. DNALI1 Promotes Neurodegeneration after Traumatic Brain Injury via Inhibition of Autophagosome-Lysosome Fusion. Adv Sci (Weinh) 2024; 11:e2306399. [PMID: 38348540 PMCID: PMC11022701 DOI: 10.1002/advs.202306399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 01/25/2024] [Indexed: 04/18/2024]
Abstract
Traumatic brain injury (TBI) leads to progressive neurodegeneration that may be caused by chronic traumatic encephalopathy (CTE). However, the precise mechanism remains unclear. Herein, the study identifies a crucial protein, axonemal dynein light intermediate polypeptide 1 (DNALI1), and elucidated its potential pathogenic role in post-TBI neurodegeneration. The DNALI1 gene is systematically screened through analyses of Aging, Dementia, and TBI studies, confirming its elevated expression both in vitro and in vivo. Moreover, it is observed that altered DNALI1 expression under normal conditions has no discernible effect. However, upon overexpression, DNALI1 inhibits autophagosome-lysosome fusion, reduces autophagic flux, and exacerbates cell death under pathological conditions. DNALI1 silencing significantly enhances autophagic flux and alleviates neurodegeneration in a CTE model. These findings highlight DNALI1 as a potential key target for preventing TBI-related neurodegeneration.
Collapse
Affiliation(s)
- Xulong Ding
- Department of Neurology and State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu610041China
- Center of Translational Medicine and Clinical LaboratoryThe Fourth Affiliated Hospital of Soochow UniversityMedical Center of Soochow UniversitySuzhou Dushu Lake HospitalSuzhouJiangsu215123China
| | - Shuqiang Cao
- Department of Forensic GeneticsWest China School of Basic Science and Forensic MedicineSichuan UniversityChengdu610041China
| | - Qing Wang
- Department of Neurology and State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu610041China
| | - Bin Du
- Department of Neurology and State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu610041China
| | - Kefeng Lu
- Department of Neurology and State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu610041China
| | - Shiqian Qi
- Department of Neurology and State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu610041China
| | - Ying Cheng
- Department of Neurology and State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu610041China
| | - Qing‐zhang Tuo
- Department of Neurology and State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu610041China
| | - Weibo Liang
- Department of Forensic GeneticsWest China School of Basic Science and Forensic MedicineSichuan UniversityChengdu610041China
| | - Peng Lei
- Department of Neurology and State Key Laboratory of BiotherapyNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu610041China
| |
Collapse
|
2
|
Lu YY, Cao M, Li F, Tian M, Ren H, Chi Q, Huang Q. Atmospheric PM 2.5 induce autophagy and autophagic flux blockage in HUVEC cells via ROS/TXNIP signaling: Important role of metal components. J Hazard Mater 2023; 445:130623. [PMID: 37056006 DOI: 10.1016/j.jhazmat.2022.130623] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 12/15/2022] [Accepted: 12/15/2022] [Indexed: 06/19/2023]
Abstract
Autophagy was involved in vascular endothelial injury caused by PM2.5, which aggravated the pathogenesis of cardiovascular diseases. However, major toxic components and underlying mechanism responsible for PM2.5-induced autophagy remain unclear. In this study, the effects of water-extracted PM2.5 (WE-PM2.5) on autophagy in human umbilical vein endothelial cells (HUVEC) were studied. Our results showed WE-PM2.5 promoted autophagosome initiation and formation, meanwhile, lysosomal function was impaired, which further caused autophagic flux blockage in HUVEC cells. Furthermore, removal of metals alleviated WE-PM2.5-induced autophagic flux blockage, while the artificial metal mixture reproduced the WE-PM2.5 response. Mechanistically, ROS regulated autophagy-related proteins evidenced by BECN1, LC3B and p62 expression reversed by NAC pretreatment in WE-PM2.5-exposed cells. WE-PM2.5 also increased TXNIP expression mediated by ROS; moreover, knockdown of TXNIP in WE-PM2.5-exposed cells decreased BECN1 and LC3B expression, but had little effects on the expression of p62, CTSB, and CTSD, indicating WE-PM2.5-induced TXNIP was involved in autophagosome initiation and formation rather than autophagic degradation. Collectively, WE-PM2.5-induced ROS not only promoted autophagosome initiation and formation, but also inhibited autophagic degradation. However, as the downstream molecule of ROS, TXNIP was only involved in autophagosome initiation and formation. Importantly, WE-PM2.5-bound metals were largely responsible for autophagic flux blockage in HUVEC cells.
Collapse
Affiliation(s)
- Yan-Yang Lu
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Meiyi Cao
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; College of Environmental and Safety Engineering, Fuzhou University, Fuzhou 10386, China
| | - Fuping Li
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Meiping Tian
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Hongyun Ren
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Qiaoqiao Chi
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Qingyu Huang
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
| |
Collapse
|
3
|
Rana T, Behl T, Sehgal A, Mehta V, Singh S, Bhatia S, Al-Harrasi A, Bungau S. Exploring the Role of Autophagy Dysfunction in Neurodegenerative Disorders. Mol Neurobiol 2021; 58:4886-4905. [PMID: 34212304 DOI: 10.1007/s12035-021-02472-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/21/2021] [Indexed: 12/12/2022]
Abstract
Autophagy is a catabolic pathway by which misfolded proteins or damaged organelles are engulfed by autophagosomes and then transported to lysosomes for degradation. Recently, a great improvement has been done to explain the molecular mechanisms and roles of autophagy in several important cellular metabolic processes. Besides being a vital clearance pathway or a cell survival pathway in response to different stresses, autophagy dysfunction, either upregulated or down-regulated, has been suggested to be linked with numerous neurodegenerative disorders like Alzheimer's disease, Parkinson's disease, Huntington's disease, and Amyotrophic lateral sclerosis. Impairment at different stages of autophagy results in the formation of large protein aggregates and damaged organelles, which leads to the onset and progression of different neurodegenerative disorders. This article elucidates the recent progress about the role of autophagy in neurodegenerative disorders and explains how autophagy dysfunction is linked with the pathogenesis of such disorders as well as the novel potential autophagy-associated therapies for treating them.
Collapse
Affiliation(s)
- Tarapati Rana
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
- Government Pharmacy College, Seraj, Mandi, Himachal Pradesh, India
| | - Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Punjab, India.
| | - Aayush Sehgal
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Vineet Mehta
- Government College of Pharmacy, Rohru, Distt. Shimla, Himachal Pradesh, India
| | - Sukhbir Singh
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Saurabh Bhatia
- Amity Institute of Pharmacy, Amity University, Haryana, India
- Natural & Medical Sciences Research Centre, University of Nizwa, Nizwa, Oman
| | - Ahmed Al-Harrasi
- Natural & Medical Sciences Research Centre, University of Nizwa, Nizwa, Oman
| | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania
| |
Collapse
|
4
|
Saltykova IV, Elahi A, Pitale PM, Gorbatyuk OS, Athar M, Gorbatyuk MS. Tribbles homolog 3-mediated targeting the AKT/mTOR axis in mice with retinal degeneration. Cell Death Dis 2021; 12:664. [PMID: 34215725 PMCID: PMC8253859 DOI: 10.1038/s41419-021-03944-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 05/28/2021] [Accepted: 06/15/2021] [Indexed: 02/07/2023]
Abstract
Various retinal degenerative disorders manifest in alterations of the AKT/mTOR axis. Despite this, consensus on the therapeutic targeting of mTOR in degenerating retinas has not yet been achieved. Therefore, we investigated the role of AKT/mTOR signaling in rd16 retinas, in which we restored the AKT/mTOR axis by genetic ablation of pseudokinase TRB3, known to inhibit phosphorylation of AKT and mTOR. First, we found that TRB3 ablation resulted in preservation of photoreceptor function in degenerating retinas. Then, we learned that the mTOR downstream cellular pathways involved in the homeostasis of photoreceptors were also reprogrammed in rd16 TRB3-/- retinas. Thus, the level of inactivated translational repressor p-4E-BP1 was significantly increased in these mice along with the restoration of translational rate. Moreover, in rd16 mice manifesting decline in p-mTOR at P15, we found elevated expression of Beclin-1 and ATG5 autophagy genes. Thus, these mice showed impaired autophagy flux measured as an increase in LC3 conversion and p62 accumulation. In addition, the RFP-EGFP-LC3 transgene expression in rd16 retinas resulted in statistically fewer numbers of red puncta in photoreceptors, suggesting impaired late autophagic vacuoles. In contrast, TRIB3 ablation in these mice resulted in improved autophagy flux. The restoration of translation rate and the boost in autophagosome formation occurred concomitantly with an increase in total Ub and rhodopsin protein levels and the elevation of E3 ligase Parkin1. We propose that TRB3 may retard retinal degeneration and be a promising therapeutic target to treat various retinal degenerative disorders.
Collapse
Affiliation(s)
- Irina V Saltykova
- Department of Optometry and Vision Science, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Asif Elahi
- Department of Optometry and Vision Science, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Priyam M Pitale
- Department of Optometry and Vision Science, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Oleg S Gorbatyuk
- Department of Optometry and Vision Science, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Mohammad Athar
- Department of Dermatology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Marina S Gorbatyuk
- Department of Optometry and Vision Science, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, USA.
| |
Collapse
|
5
|
Durgan J, Lystad AH, Sloan K, Carlsson SR, Wilson MI, Marcassa E, Ulferts R, Webster J, Lopez-Clavijo AF, Wakelam MJ, Beale R, Simonsen A, Oxley D, Florey O. Non-canonical autophagy drives alternative ATG8 conjugation to phosphatidylserine. Mol Cell 2021; 81:2031-2040.e8. [PMID: 33909989 PMCID: PMC8122138 DOI: 10.1016/j.molcel.2021.03.020] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 01/15/2021] [Accepted: 03/16/2021] [Indexed: 01/22/2023]
Abstract
Autophagy is a fundamental catabolic process that uses a unique post-translational modification, the conjugation of ATG8 protein to phosphatidylethanolamine (PE). ATG8 lipidation also occurs during non-canonical autophagy, a parallel pathway involving conjugation of ATG8 to single membranes (CASM) at endolysosomal compartments, with key functions in immunity, vision, and neurobiology. It is widely assumed that CASM involves the same conjugation of ATG8 to PE, but this has not been formally tested. Here, we discover that all ATG8s can also undergo alternative lipidation to phosphatidylserine (PS) during CASM, induced pharmacologically, by LC3-associated phagocytosis or influenza A virus infection, in mammalian cells. Importantly, ATG8-PS and ATG8-PE adducts are differentially delipidated by the ATG4 family and bear different cellular dynamics, indicating significant molecular distinctions. These results provide important insights into autophagy signaling, revealing an alternative form of the hallmark ATG8 lipidation event. Furthermore, ATG8-PS provides a specific "molecular signature" for the non-canonical autophagy pathway.
Collapse
Affiliation(s)
- Joanne Durgan
- Signalling Programme, Babraham Institute, Cambridge, UK
| | - Alf H Lystad
- Department of Molecular Medicine, University of Oslo, Oslo, Norway
| | | | - Sven R Carlsson
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, Sweden
| | | | | | | | - Judith Webster
- Mass Spectrometry Facility, Babraham Institute, Cambridge, UK
| | | | - Michael J Wakelam
- Signalling Programme, Babraham Institute, Cambridge, UK; Lipidomics Facility, Babraham Institute, Cambridge, UK
| | | | - Anne Simonsen
- Department of Molecular Medicine, University of Oslo, Oslo, Norway
| | - David Oxley
- Mass Spectrometry Facility, Babraham Institute, Cambridge, UK
| | - Oliver Florey
- Signalling Programme, Babraham Institute, Cambridge, UK.
| |
Collapse
|
6
|
Choi SH, Agatisa-Boyle C, Gonen A, Kim A, Kim J, Alekseeva E, Tsimikas S, Miller YI. Intracellular AIBP (Apolipoprotein A-I Binding Protein) Regulates Oxidized LDL (Low-Density Lipoprotein)-Induced Mitophagy in Macrophages. Arterioscler Thromb Vasc Biol 2021; 41:e82-e96. [PMID: 33356389 PMCID: PMC8105271 DOI: 10.1161/atvbaha.120.315485] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Atherosclerotic lesions are often characterized by accumulation of OxLDL (oxidized low-density lipoprotein), which is associated with vascular inflammation and lesion vulnerability to rupture. Extracellular AIBP (apolipoprotein A-I binding protein; encoded by APOA1BP gene), when secreted, promotes cholesterol efflux and regulates lipid rafts dynamics, but its role as an intracellular protein in mammalian cells remains unknown. The aim of this work was to determine the function of intracellular AIBP in macrophages exposed to OxLDL and in atherosclerotic lesions. Approach and Results: Using a novel monoclonal antibody against human and mouse AIBP, which are highly homologous, we demonstrated robust AIBP expression in human and mouse atherosclerotic lesions. We observed significantly reduced autophagy in bone marrow-derived macrophages, isolated from Apoa1bp-/- compared with wild-type mice, which were exposed to OxLDL. In atherosclerotic lesions from Apoa1bp-/- mice subjected to Ldlr knockdown and fed a Western diet, autophagy was reduced, whereas apoptosis was increased, when compared with that in wild-type mice. AIBP expression was necessary for efficient control of reactive oxygen species and cell death and for mitochondria quality control in macrophages exposed to OxLDL. Mitochondria-localized AIBP, via its N-terminal domain, associated with E3 ubiquitin-protein ligase PARK2 (Parkin), MFN (mitofusin)1, and MFN2, but not BNIP3 (Bcl2/adenovirus E1B 19-kDa-interacting protein-3), and regulated ubiquitination of MFN1 and MFN2, key components of mitophagy. CONCLUSIONS These data suggest that intracellular AIBP is a new regulator of autophagy in macrophages. Mitochondria-localized AIBP augments mitophagy and participates in mitochondria quality control, protecting macrophages against cell death in the context of atherosclerosis.
Collapse
Affiliation(s)
- Soo-Ho Choi
- Department of Medicine University of California San Diego, La Jolla, CA 92093
| | - Colin Agatisa-Boyle
- Department of Medicine University of California San Diego, La Jolla, CA 92093
| | - Ayelet Gonen
- Department of Medicine University of California San Diego, La Jolla, CA 92093
| | - Alisa Kim
- Department of Medicine University of California San Diego, La Jolla, CA 92093
| | - Jungsu Kim
- Department of Medicine University of California San Diego, La Jolla, CA 92093
| | - Elena Alekseeva
- Department of Medicine University of California San Diego, La Jolla, CA 92093
| | - Sotirios Tsimikas
- Department of Medicine University of California San Diego, La Jolla, CA 92093
| | - Yury I. Miller
- Department of Medicine University of California San Diego, La Jolla, CA 92093
| |
Collapse
|
7
|
Wang C, Nie G, Zhuang Y, Hu R, Wu H, Xing C, Li G, Hu G, Yang F, Zhang C. Inhibition of autophagy enhances cadmium-induced apoptosis in duck renal tubular epithelial cells. Ecotoxicol Environ Saf 2020; 205:111188. [PMID: 32836151 DOI: 10.1016/j.ecoenv.2020.111188] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/11/2020] [Accepted: 08/14/2020] [Indexed: 06/11/2023]
Abstract
Increasing evidence indicates autophagy and apoptosis are involved in the toxicity mechanism of heavy metals. Our previous studies showed that cadmium (Cd) could induce autophagy and apoptosis in duck kidneys in vivo, nevertheless, the interaction between them has yet to be elucidated. Herein, the cells were either treated with 3CdSO4·8H2O (0, 1.25, 2.5, 5.0 μM Cd) or/and 3-methyladenine (3-MA) (2.5 μM) for 12 h and the indictors related autophagy and apoptosis were detected to assess the correlation between autophagy and apoptosis induced by Cd in duck renal tubular epithelial cells. The results demonstrated that Cd exposure notably elevated intracellular and extracellular Cd contents, the number of autophagosomes and LC3 puncta, up-regulated LC3A, LC3B, Beclin-1, Atg5 mRNA levels, and Beclin-1 and LC3II/LC3I protein levels, down-regulated mTOR, p62 and Dynein mRNA levels and p62 protein level. Additionally, autophagy inhibitor 3-MA decreased Beclin-1, LC3II/LC3I protein levels and increased p62 protein level. Moreover, co-treatment with Cd and 3-MA could notably elevate Caspase-3, Cyt C, Bax, and Bak-1 mRNA levels, Caspase-3 and cleaved Caspase-3 protein levels, and cell apoptotic rate as well as cell damage, decreased mitochondrial membrane potential (MMP), Bcl-2 mRNA level and the ratio of Bcl-2 to Bax compared to treatment with Cd alone. Overall, these results indicate Cd exposure can induce autophagy in duck renal tubular epithelial cells, and inhibition of autophagy might aggravate Cd-induced apoptosis through mitochondria-mediated pathway.
Collapse
Affiliation(s)
- Chang Wang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China
| | - Gaohui Nie
- School of Information Technology, Jiangxi University of Finance and Economics, No. 665 Yuping West Street, Economic and Technological Development District, Nanchang, 330032, Jiangxi, PR China
| | - Yu Zhuang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China
| | - Ruiming Hu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China
| | - Huansheng Wu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China
| | - Chenghong Xing
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China
| | - Guyue Li
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China
| | - Guoliang Hu
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China
| | - Fan Yang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China.
| | - Caiying Zhang
- Jiangxi Provincial Key Laboratory for Animal Health, Institute of Animal Population Health, College of Animal Science and Technology, Jiangxi Agricultural University, No. 1101 Zhimin Avenue, Economic and Technological Development District, Nanchang, 330045, Jiangxi, PR China.
| |
Collapse
|
8
|
Cao J, Tang C, Gao M, Rui Y, Zhang J, Wang L, Wang Y, Xu B, Yan BC. Hyperoside alleviates epilepsy-induced neuronal damage by enhancing antioxidant levels and reducing autophagy. J Ethnopharmacol 2020; 257:112884. [PMID: 32311482 DOI: 10.1016/j.jep.2020.112884] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 04/09/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Hypericum perforatum L. (genus Hypericum, family Hypericaceae), a plant commonly used in traditional Chinese medicine, is believed to confer a wide range of benefits, including fever reduction, detoxification, calming, and pain relief via decoctions of its stems and leaves. Hyperoside (HYP), a natural compound extracted from Hypericum perforatum L., has been shown to demonstrate a wide array of bioactivities including antioxidative, anti-inflammatory, and anti-apoptotic effects. In this study, we investigated the effects of HYP on epilepsy-induced neuronal damage in mice and the associated regulatory factors. AIM OF THE STUDY This study examined the potential therapeutic use of HYP for the treatment of neuronal damage in a mouse model of epilepsy and explored the relationships of the potential neuroprotective effects of HYP pretreatment with antioxidant levels and autophagy. MATERIALS AND METHODS ICR mice were randomly divided into six groups: sham group, sham-HYP group, KA group, KA-HYP group, KA-HYP-DDC group and KA-CQ group. Immunohistochemical staining was used to assess changes in NeuN, IBA-1, and GFAP expression in the CA3 region of the hippocampus. Immunofluorescence staining was used to assess the effects of HYP on the number of autophagosomes that accumulated in neurons in the hippocampal CA3 region. The levels of SOD1, SOD2, LC3I/II, Beclin1, and PI3K/AKT and MAPK signaling-related proteins were detected by Western blot. RESULTS Pretreatment with 50 mg/kg HYP protected against epilepsy-induced neuronal damage in the hippocampal CA3 region. Additionally, HYP enhanced antioxidant levels and reduced the levels of autophagy-related proteins via the PI3K/AKT and MAPK pathways. CONCLUSION HYP protected the hippocampal CA3 region against epilepsy-induced neuronal damage via enhancing antioxidant levels and reducing autophagy. The mechanism of action may be related to the maintenance of antioxidant levels and the suppression of autophagy via the PI3K/Akt and MAPK pathways.
Collapse
Affiliation(s)
- Jianwen Cao
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China
| | - Cheng Tang
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China
| | - Manman Gao
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China
| | - Yanggang Rui
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China
| | - Jie Zhang
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China
| | - Li Wang
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China
| | - Yang Wang
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China
| | - Bo Xu
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China
| | - Bing Chun Yan
- Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou University, Yangzhou, 225001, PR China; Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, 225001, PR China; Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou, 225001, PR China; Department of Neurology, Affiliated Hospital, Yangzhou University, 225001, PR China; Jiangsu Key Laboratory of Zoonosis, Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine of Yangzhou University, Yangzhou, 225009, PR China.
| |
Collapse
|
9
|
Zhang Y, Liu D, Liu Z. The benzo[b]fluoranthene in the atmospheric fine particulate matter induces mouse glomerular podocytes injury via inhibition of autophagy. Ecotoxicol Environ Saf 2020; 195:110403. [PMID: 32193019 DOI: 10.1016/j.ecoenv.2020.110403] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/25/2020] [Accepted: 02/27/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Evidence shows that individuals who are under long-term exposure to environmental PM2.5 are at increased risk of chronic kidney disease. Various laboratory experiments also suggest several mechanistic links between PM2.5 exposure and kidney injury. Polycyclic aromatic hydrocarbons (PAHs) are common organic chemicals existing in PM2.5. However, whether benzo [b]fluoranthene (BbF), the most potent carcinogens and the highest content of PAHs, plays an important role in podocyte injury via reducing autophagy, have not been reported. METHODS Podocytes were exposed to different concentrations and times of BbF. Cell viability was assessed by using CCK-8. Morphological phenotypes were detected by using optical microscopy. Cytoskeletons were detected by using immunofluorescence assay. Expression of podocyte injury markers were determined by Western blot. Podocytes were observed under TEM, autophagic activity was evaluated by Western blot analysis and immunofluorescence assay. A possible effect of an inhibitor (CQ, chloroquine) or an inducer (rapamycin) of autophagy on BbF-induced podocyte injury also was examined. RESULTS BbF changed cellular morphology, decreased cell viability and rearranged cytoskeleton. The proteins' expression level of autophagy and the numbers of autophagosomes under TEM was decreased and the proteins' expression level of slit diaphragm was increased in a dose- and time-dependent manner. In addition, BbF-induced podocyte injury was enhanced by inhibition of autophagy and inhibited by activation of autophagy in podocytes. CONCLUSIONS Taken together, our data suggest that BbF is toxic to podocytes, as well as reduce autophagy. Furthermore, inhibition of autophagy plays a regulatory role in BbF-induced podocyte injury.
Collapse
Affiliation(s)
- Yilin Zhang
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, PR China; Research Institute of Nephrology,Zhengzhou University, Zhengzhou, 450052, PR China; Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou, 450052, PR China; Core Unit of National Clinical Medical Research Center of Kidney Disease, Zhengzhou, 450052, PR China.
| | - Dongwei Liu
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, PR China; Research Institute of Nephrology,Zhengzhou University, Zhengzhou, 450052, PR China; Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou, 450052, PR China; Core Unit of National Clinical Medical Research Center of Kidney Disease, Zhengzhou, 450052, PR China.
| | - Zhangsuo Liu
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, PR China; Research Institute of Nephrology,Zhengzhou University, Zhengzhou, 450052, PR China; Key Laboratory of Precision Diagnosis and Treatment for Chronic Kidney Disease in Henan Province, Zhengzhou, 450052, PR China; Core Unit of National Clinical Medical Research Center of Kidney Disease, Zhengzhou, 450052, PR China.
| |
Collapse
|
10
|
Yavarow ZA, Kang HR, Waskowicz LR, Bay BH, Young SP, Yen PM, Koeberl DD. Fenofibrate rapidly decreases hepatic lipid and glycogen storage in neonatal mice with glycogen storage disease type Ia. Hum Mol Genet 2020; 29:286-294. [PMID: 31816064 PMCID: PMC7003036 DOI: 10.1093/hmg/ddz290] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/20/2019] [Accepted: 12/02/2019] [Indexed: 12/26/2022] Open
Abstract
Glycogen storage disease type Ia (GSD Ia) is caused by autosomal mutations in glucose-6-phosphatase α catalytic subunit (G6PC) and can present with severe hypoglycemia, lactic acidosis and hypertriglyceridemia. In both children and adults with GSD Ia, there is over-accumulation of hepatic glycogen and triglycerides that can lead to steatohepatitis and a risk for hepatocellular adenoma or carcinoma. Here, we examined the effects of the commonly used peroxisomal proliferated activated receptor α agonist, fenofibrate, on liver and kidney autophagy and lipid metabolism in 5-day-old G6pc -/- mice serving as a model of neonatal GSD Ia. Five-day administration of fenofibrate decreased the elevated hepatic and renal triglyceride and hepatic glycogen levels found in control G6pc -/- mice. Fenofibrate also induced autophagy and promoted β-oxidation of fatty acids and stimulated gene expression of acyl-CoA dehydrogenases in the liver. These findings show that fenofibrate can rapidly decrease hepatic glycogen and triglyceride levels and renal triglyceride levels in neonatal G6pc -/- mice. Moreover, since fenofibrate is an FDA-approved drug that has an excellent safety profile, our findings suggest that fenofibrate could be a potential pharmacological therapy for GSD Ia in neonatal and pediatric patients as well as for adults. These findings may also apply to non-alcoholic fatty liver disease, which shares similar pathological and metabolic changes with GSD Ia.
Collapse
Affiliation(s)
- Zollie A Yavarow
- Department of Pharmacology, Duke University, Durham NC 27710, USA
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham NC 27710, USA
| | - Hye-Ri Kang
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham NC 27710, USA
| | - Lauren R Waskowicz
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham NC 27710, USA
| | - Boon-Huat Bay
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117594, Singapore
| | - Sarah P Young
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham NC 27710, USA
| | - Paul M Yen
- Cardiovascular and Metabolic Disorders Program, Duke—National University of Singapore Graduate Medical School Singapore, Singapore 169547, Singapore
| | - Dwight D Koeberl
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham NC 27710, USA
- Department of Molecular Genetics and Microbiology, Duke University, Durham, NC 27710, USA
| |
Collapse
|
11
|
Petcherski A, Chandrachud U, Butz ES, Klein MC, Zhao WN, Reis SA, Haggarty SJ, Ruonala MO, Cotman SL. An Autophagy Modifier Screen Identifies Small Molecules Capable of Reducing Autophagosome Accumulation in a Model of CLN3-Mediated Neurodegeneration. Cells 2019; 8:cells8121531. [PMID: 31783699 PMCID: PMC6953052 DOI: 10.3390/cells8121531] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 11/23/2019] [Accepted: 11/24/2019] [Indexed: 12/17/2022] Open
Abstract
Alterations in the autophagosomal–lysosomal pathway are a major pathophysiological feature of CLN3 disease, which is the most common form of childhood-onset neurodegeneration. Accumulating autofluorescent lysosomal storage material in CLN3 disease, consisting of dolichols, lipids, biometals, and a protein that normally resides in the mitochondria, subunit c of the mitochondrial ATPase, provides evidence that autophagosomal–lysosomal turnover of cellular components is disrupted upon loss of CLN3 protein function. Using a murine neuronal cell model of the disease, which accurately mimics the major gene defect and the hallmark features of CLN3 disease, we conducted an unbiased search for modifiers of autophagy, extending previous work by further optimizing a GFP-LC3 based assay and performing a high-content screen on a library of ~2000 bioactive compounds. Here we corroborate our earlier screening results and identify expanded, independent sets of autophagy modifiers that increase or decrease the accumulation of autophagosomes in the CLN3 disease cells, highlighting several pathways of interest, including the regulation of calcium signaling, microtubule dynamics, and the mevalonate pathway. Follow-up analysis on fluspirilene, nicardipine, and verapamil, in particular, confirmed activity in reducing GFP-LC3 vesicle burden, while also demonstrating activity in normalizing lysosomal positioning and, for verapamil, in promoting storage material clearance in CLN3 disease neuronal cells. This study demonstrates the potential for cell-based screening studies to identify candidate molecules and pathways for further work to understand CLN3 disease pathogenesis and in drug development efforts.
Collapse
Affiliation(s)
- Anton Petcherski
- Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA; (A.P.); (U.C.); (E.S.B.); (M.C.K.); (W.-N.Z.); (S.A.R.); (S.J.H.)
- Center for Membrane Proteomics, Goethe University of Frankfurt, 60438 Frankfurt am Main, Germany;
| | - Uma Chandrachud
- Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA; (A.P.); (U.C.); (E.S.B.); (M.C.K.); (W.-N.Z.); (S.A.R.); (S.J.H.)
| | - Elisabeth S. Butz
- Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA; (A.P.); (U.C.); (E.S.B.); (M.C.K.); (W.-N.Z.); (S.A.R.); (S.J.H.)
| | - Madeleine C. Klein
- Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA; (A.P.); (U.C.); (E.S.B.); (M.C.K.); (W.-N.Z.); (S.A.R.); (S.J.H.)
| | - Wen-Ning Zhao
- Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA; (A.P.); (U.C.); (E.S.B.); (M.C.K.); (W.-N.Z.); (S.A.R.); (S.J.H.)
| | - Surya A. Reis
- Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA; (A.P.); (U.C.); (E.S.B.); (M.C.K.); (W.-N.Z.); (S.A.R.); (S.J.H.)
| | - Stephen J. Haggarty
- Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA; (A.P.); (U.C.); (E.S.B.); (M.C.K.); (W.-N.Z.); (S.A.R.); (S.J.H.)
| | - Mika O. Ruonala
- Center for Membrane Proteomics, Goethe University of Frankfurt, 60438 Frankfurt am Main, Germany;
| | - Susan L. Cotman
- Center for Genomic Medicine, Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA; (A.P.); (U.C.); (E.S.B.); (M.C.K.); (W.-N.Z.); (S.A.R.); (S.J.H.)
- Correspondence: ; Tel.: +1-617-726-9180
| |
Collapse
|
12
|
Wang X, Sun D, Hu Y, Xu X, Jiang W, Shang H, Cui D. The roles of oxidative stress and Beclin-1 in the autophagosome clearance impairment triggered by cardiac arrest. Free Radic Biol Med 2019; 136:87-95. [PMID: 30951836 DOI: 10.1016/j.freeradbiomed.2018.12.039] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 12/19/2018] [Accepted: 12/19/2018] [Indexed: 02/03/2023]
Abstract
During cardiac arrest and return of spontaneous circulation (CA-ROSC), autophagosome clearance in the cortex is progressively impaired, but the role of reactive oxygen species (ROS) in this process and the mechanism underlying the autophagy impairment remain unknown. In this study, we investigated the impacts of ROS on the autophagy-lysosome pathway after CA-ROSC in rats. Cortices from CA-ROSC rats revealed accumulation of LC3, p62 and ubiquitin, indicating impaired autophagic flux. Furthermore, impairment of autophagic flux was related to lysosomal lesion, as indicated by decreased cathepsin D and lysosomal-associated membrane protein 2 (LAMP2) levels after CA-ROSC. In vitro, the resulting ROS generation blocked autophagosome processing and caused accumulation of LC3-II, ubiquitin, and p62, leading to mitochondrial dysfunction and cell death; this outcome was alleviated by cyclosporine A (CsA) pretreatment. Interestingly, ischemia/reperfusion injury was connected with ROS-mediated Beclin-1 upregulation and a reduction in LAMP2, which is a pivotal protein in the autophagy-lysosome pathway. Recovery of the LAMP2 levels and partial Beclin-1 silencing restored the autophagic flux and reduced cell death after CA-ROSC. Taken together, our data indicate that CA-ROSC injury impairs autophagosome clearance partially through a ROS-induced decline in LAMP2 and increase in Beclin-1, leading to increased neuronal cell death.
Collapse
Affiliation(s)
- Xintao Wang
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Dawei Sun
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Yue Hu
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Xiaotao Xu
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Wei Jiang
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China
| | - Hanbing Shang
- Department of Neurosurgery, Shanghai Ruijin Hospital Affiliated with Medical School of Shanghai Jiaotong University, China.
| | - Derong Cui
- Department of Anesthesiology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, China.
| |
Collapse
|
13
|
Zhou XL, Wan XM, Fu XX, Xie CG. Puerarin prevents cadmium-induced hepatic cell damage by suppressing apoptosis and restoring autophagic flux. Biomed Pharmacother 2019; 115:108929. [PMID: 31060001 DOI: 10.1016/j.biopha.2019.108929] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/22/2019] [Accepted: 04/26/2019] [Indexed: 01/05/2023] Open
Abstract
Cadmium (Cd) is a common heavy metal contamination that is highly toxic to liver. Puerarin (PU), a potent free radical scavenger, has been shown to exert cytoprotective effect in numerous pathological processes. However, whether PU affords protection against Cd-induced hepatotoxicity remains unclear to be known. Here, we aimed to investigate the protective effect of PU on Cd-induced hepatotoxicity in an immortalized mouse hepatocyte line, AML-12. First, Cd-induced cytotoxicity in AML-12 cells was obviously ameliorated by PU treatment. Also, Cd-induced apoptotic cell death was markedly alleviated by PU treatment, evidenced by two methods. Simultaneously, Cd-elevated malondialdehyde and reactive oxygen species levels were significantly reduced by PU administration, demonstrating the antioxidant effect of PU against Cd exposure. Moreover, Cd-induced blockage of autophagic flux in AML-12 cells was obviously restored by PU treatment, evidenced by immunoblot analysis of autophagy marker proteins and tandem fluorescent-tagged LC3 method. Resultantly, Cd-induced autophagosome accumulation was significantly alleviated by PU treatment. In conclusion, these observations demonstrate that PU treatment alleviates Cd-induced hepatic cell damage by inhibiting apoptosis and restoring autophagy activity, which is intimately related with its antioxidant activity.
Collapse
Affiliation(s)
- Xue-Lei Zhou
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-er-qiao Road, Chengdu, 610072, Sichuan Province, PR China; Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611130, PR China
| | - Xue-Mei Wan
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-er-qiao Road, Chengdu, 610072, Sichuan Province, PR China; Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611130, PR China
| | - Xiao-Xu Fu
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-er-qiao Road, Chengdu, 610072, Sichuan Province, PR China; Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611130, PR China
| | - Chun-Guang Xie
- Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi-er-qiao Road, Chengdu, 610072, Sichuan Province, PR China; Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611130, PR China.
| |
Collapse
|
14
|
Wang K, Wei Y, Liu W, Liu L, Guo Z, Fan C, Wang L, Hu J, Li B. Mechanical Stress-Dependent Autophagy Component Release via Extracellular Nanovesicles in Tumor Cells. ACS Nano 2019; 13:4589-4602. [PMID: 30884224 DOI: 10.1021/acsnano.9b00587] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Tumor cells metastasizing through the bloodstream or lymphatic systems must withstand acute shear stress (ASS). Autophagy is a cell survival mechanism that functions in response to stressful conditions, but also contributes to cell death or apoptosis. We predicted that a compensation pathway to autophagy exists in tumor cells subjected to mechanical stress. We found that ASS promoted autophagosome (AP) accumulation and induced release of extracellular nanovesicles (EVs) containing autophagy components. Furthermore, we found that ASS promoted autophagic vesicles fused with multivesicular body (MVB) to form an AP-MVB compartment and then induced autophagy component release into the extracellular space via EVs through the autophagy-MVB-exosome pathway. More importantly, either increasing intracellular autophagosome accumulation or inhibiting autophagic degradation promoted AP-MVB accumulation but did not induce autophagy-associated protein release via EVs except under ASS, demonstrating the existence of a mechanical stress-dependent compensation pathway. Together, these findings revealed that EVs provide an additional protection mechanism for tumor cells and counteract autophagy to maintain cellular homeostasis under acute shear stress.
Collapse
Affiliation(s)
- Kaizhe Wang
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Yuhui Wei
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- Shanghai Advanced Research Institute , Chinese Academy of Sciences , Shanghai 201210 , China
| | - Wenjing Liu
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Lin Liu
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Zhen Guo
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Chunhai Fan
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- School of Chemistry and Chemical Engineering, and Institute of Molecular Medicine, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Lihua Wang
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- Shanghai Advanced Research Institute , Chinese Academy of Sciences , Shanghai 201210 , China
| | - Jun Hu
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- Shanghai Advanced Research Institute , Chinese Academy of Sciences , Shanghai 201210 , China
| | - Bin Li
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics , Chinese Academy of Sciences, Shanghai 201800 , China
- Shanghai Advanced Research Institute , Chinese Academy of Sciences , Shanghai 201210 , China
| |
Collapse
|
15
|
Abstract
Neurons are long-lived and highly polarized cells that depend on autophagy to maintain cellular homeostasis. The robust, constitutive biogenesis of autophagosomes in the distal axon occurs via a conserved pathway that is required to maintain functional synapses and prevent axon degeneration. Autophagosomes are formed de novo at the axon terminal in a stepwise assembly process, engulfing mitochondrial fragments, aggregated proteins, and bulk cytosol in what appears to be a nonselective uptake mechanism. Following formation, autophagosomes fuse with late endosomes/lysosomes and then are rapidly and efficiently transported along the axon toward the soma, driven by the microtubule motor cytoplasmic dynein. Motile autophagosomes mature to autolysosomes in transit by fusing with additional late endosomes/lysosomes, arriving at the soma as fully competent degradative organelles. Misregulation of neuronal autophagy leads to axonal degeneration and synaptic destabilization, and has been implicated in neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, Huntington's disease, and ALS.
Collapse
Affiliation(s)
- Andrea K H Stavoe
- Department of Physiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, United States
| | - Erika L F Holzbaur
- Department of Physiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, United States.
| |
Collapse
|
16
|
Shi C, Xue W, Han B, Yang F, Yin Y, Hu C. Acetaminophen aggravates fat accumulation in NAFLD by inhibiting autophagy via the AMPK/mTOR pathway. Eur J Pharmacol 2019; 850:15-22. [PMID: 30753863 DOI: 10.1016/j.ejphar.2019.02.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 02/02/2019] [Accepted: 02/08/2019] [Indexed: 12/24/2022]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease which affects millions of people worldwide. Acetaminophen (APAP) overdose is the leading cause of acute liver failure. In this study, APAP (50, 100, 200 mg/kg) were employed on mice fed with a high-fat diet, and APAP (2, 4, 8 mM) were cultured with L02 cells in the presence of alcohol and oleic acid. APAP treatment significantly aggravated hepatic lipid accumulation, increased the serum levels of triglyceride (TG), alanine aminotransferase (ALT) and aspartate aminotransferase (AST), and increased hepatic lipid accumulation in H&E and Oil red O staining results. Transmission electron microscopy (TEM) found fewer number of autophagosomes in APAP (100 mg/kg) treated group. Immunohistochemistry analysis showed the intensity of hepatic mTOR was increased and AMPK was decreased in 200 mg/kg APAP treated group. Western blot analysis showed APAP treatment decreased the levels of LC3-Ⅱ, Beclin1 and AMPK, while increased the levels of mTOR and SREBP-1c, respectively. In vitro study showed APAP treatment obviously increased TG activities in cell supernatant, and Oil red O staining had the same results. Western blot analysis demonstrated APAP treatment decreased the levels of LC3-Ⅱ, Beclin1 and AMPK, increased the levels of mTOR and SREBP-1c, but rapamycin treatment significantly reversed these effects of APAP. In conclusion, therapeutic dosages of APAP aggravates fat accumulation in NAFLD, the potential mechanism might be involved in inhibiting autophagy associated with the AMPK/mTOR pathway, and patients with NAFLD should use a lower dose of APAP.
Collapse
Affiliation(s)
- Congjian Shi
- Institute for Liver Diseases of Anhui Medical University, School of Pharmacy, Anhui Medical University, Hefei 230032, China; Key Laboratory of anti-inflammatory and Immune Medicine, Ministry of Education, Hefei 230032, China
| | - Weiju Xue
- Institute for Liver Diseases of Anhui Medical University, School of Pharmacy, Anhui Medical University, Hefei 230032, China; Key Laboratory of anti-inflammatory and Immune Medicine, Ministry of Education, Hefei 230032, China
| | - Bowen Han
- Institute for Liver Diseases of Anhui Medical University, School of Pharmacy, Anhui Medical University, Hefei 230032, China; Key Laboratory of anti-inflammatory and Immune Medicine, Ministry of Education, Hefei 230032, China
| | - Fengli Yang
- Institute for Liver Diseases of Anhui Medical University, School of Pharmacy, Anhui Medical University, Hefei 230032, China; Key Laboratory of anti-inflammatory and Immune Medicine, Ministry of Education, Hefei 230032, China
| | - Yaping Yin
- Institute for Liver Diseases of Anhui Medical University, School of Pharmacy, Anhui Medical University, Hefei 230032, China; Key Laboratory of anti-inflammatory and Immune Medicine, Ministry of Education, Hefei 230032, China
| | - Chengmu Hu
- Institute for Liver Diseases of Anhui Medical University, School of Pharmacy, Anhui Medical University, Hefei 230032, China; Key Laboratory of anti-inflammatory and Immune Medicine, Ministry of Education, Hefei 230032, China.
| |
Collapse
|
17
|
Lueschow SR, Stumphy J, Gong H, Kern SL, Elgin TG, Underwood MA, Kalanetra KM, Mills DA, Wong MH, Meyerholz DK, Good M, McElroy SJ. Loss of murine Paneth cell function alters the immature intestinal microbiome and mimics changes seen in neonatal necrotizing enterocolitis. PLoS One 2018; 13:e0204967. [PMID: 30273395 PMCID: PMC6166990 DOI: 10.1371/journal.pone.0204967] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 09/16/2018] [Indexed: 01/06/2023] Open
Abstract
Necrotizing enterocolitis (NEC) remains the leading cause of gastrointestinal morbidity and mortality in premature infants. Human and animal studies suggest a role for Paneth cells in NEC pathogenesis. Paneth cells play critical roles in host-microbial interactions and epithelial homeostasis. The ramifications of eliminating Paneth cell function on the immature host-microbial axis remains incomplete. Paneth cell function was depleted in the immature murine intestine using chemical and genetic models, which resulted in intestinal injury consistent with NEC. Paneth cell depletion was confirmed using histology, electron microscopy, flow cytometry, and real time RT-PCR. Cecal samples were analyzed at various time points to determine the effects of Paneth cell depletion with and without Klebsiella gavage on the microbiome. Deficient Paneth cell function induced significant compositional changes in the cecal microbiome with a significant increase in Enterobacteriacae species. Further, the bloom of Enterobacteriaceae species that occurs is phenotypically similar to what is seen in human NEC. This further strengthens our understanding of the importance of Paneth cells to intestinal homeostasis in the immature intestine.
Collapse
Affiliation(s)
- Shiloh R. Lueschow
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United States of America
| | - Jessica Stumphy
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Huiyu Gong
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Stacy L. Kern
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Timothy G. Elgin
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Mark A. Underwood
- Departments of Pediatrics and Food Science and Technology, University of California Davis, Sacramento, California, United States of America
| | - Karen M. Kalanetra
- Departments of Pediatrics and Food Science and Technology, University of California Davis, Sacramento, California, United States of America
| | - David A. Mills
- Departments of Pediatrics and Food Science and Technology, University of California Davis, Sacramento, California, United States of America
| | - Melissa H. Wong
- Department of Cell, Developmental, and Cancer Biology, Oregon Health & Science University, Portland, Oregon, United States of America
| | - David K. Meyerholz
- Department of Pathology, University of Iowa, Iowa City, Iowa, United States of America
| | - Misty Good
- Department of Pediatrics, Washington University School of Medicine, St Louis, Missouri, United States of America
| | - Steven J. McElroy
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United States of America
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| |
Collapse
|
18
|
Abunimer AN, Mohammed H, Cook KL, Soto-Pantoja DR, Campos MM, Abu-Asab MS. Mitochondrial autophagosomes as a mechanism of drug resistance in breast carcinoma. Ultrastruct Pathol 2018; 42:170-180. [PMID: 29419344 PMCID: PMC6060621 DOI: 10.1080/01913123.2017.1419328] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We have previously described the process by which mitochondria donate their membranes for the formation of autophagosomes, and in this study we show that the same process could be involved in drug sequestration and exocytosis resulting in multidrug-resistant cancerous cells. We examine the implications of mitochondrial vesicle formation of mitoautophagosomes (MAPS) in response to the cytotoxic drug MKT-077, which targets mortalin, in a drug-resistant breast carcinoma cell line overexpressing P-glycoprotein (P-gp). The breast cancer cell line MCF-7Adr is derived from MCF-7, but differs from its ancestral line in tolerance of MKT-077-induced mitochondrial toxicity. Our ultrastructural observations suggest that autophagy in the MCF-7Adr cells entails regional sequestration of MKT077 in multilamellar LC3-labeled MAPS, which then separate from their mitochondria, and fuse with or engulf each other. MAPS appeared to be migrating through the cytoplasm and fusing with the plasma membrane, thus carrying out exocytotic secretion. This mechanism, which seems ineffective in the ancestral cell line, provides a resistance mechanism for MKT-077 by enhancing the efflux process of the cells. After 8 hr of MKT-077 exposure, a fraction of the resistant cells appeared viable and contained larger number of smaller sized mitochondria. Mitoautophagosomes, therefore, provide a potentially novel model for multidrug resistance in cancerous cells and may contribute to the P-gp efflux process.
Collapse
Affiliation(s)
- Ayman N. Abunimer
- Virginia Tech Carilion School of Medicine and Research Institute, Roanoke, VA, USA
| | - Heba Mohammed
- Section of Histopathology, National Eye Institute, NIH, Bethesda, MD, USA
| | - Katherine L. Cook
- Department of Surgery and Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - David R. Soto-Pantoja
- Department of Surgery and Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | | | - Mones S. Abu-Asab
- Section of Histopathology, National Eye Institute, NIH, Bethesda, MD, USA
| |
Collapse
|
19
|
Li Z, Liu F, Zhang L, Cao Y, Shao Y, Wang X, Jiang X, Chen Z. Neuroserpin restores autophagy and promotes functional recovery after acute spinal cord injury in rats. Mol Med Rep 2018; 17:2957-2963. [PMID: 29257287 PMCID: PMC5783514 DOI: 10.3892/mmr.2017.8249] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 04/06/2017] [Indexed: 01/07/2023] Open
Abstract
This study is to reveal the characteristics of autophagy and the effect of neuroserpin (NSP) treatment on autophagy during the process of functional recovery following spinal cord injury (SCI). After the clip compress rat model of SCI had been made, autophagy‑associated proteins, including LC3‑II, beclin‑1 and p62, were evaluated at 2, 4, 24, 72 h, and 168 h in the experimental group, and the sham group as control. Transmission electron microscopy (TEM) was further used for autophagy detection at 4 and 72 h. All the male rats were randomly divided into three groups: Sham, vehicle and NSP group. NSP or an equal volume of saline vehicle was administered via intrathecal injection immediately after SCI. Each group was further divided into subgroups for the following experiments: i)Western blot (LC3‑II and p62); ii) Immunofluorescent double staining (LC3/MAP‑2/DAPI); iii) Nissl staining and Basso Beattie Bresnahan (BBB score) for NSP neuroprotection evaluation. Our results revealed both LC3‑II and p62 expression trended upward at 24, 72 and 168 h after SCI. The LC3‑II peaked at 72 h, while p62 peaked at 24 h. Beclin‑1 dropped significantly at 72 and 168 h. TEM results showed that autophagosomes largely accumulated at 72 h after SCI when compared with the sham group. Western blot analysis showed that LC3‑II and p62 were markedly decreased with NSP treatment at 72 h after injury compared with that of the vehicle‑group. Immunofluorescent double labeling indicated that accumulation of autophagosomes was reduced in the NSP group. Further, post‑SCI treatment with NSP improved the BBB scale and increased the number of anterior horn motor neurons. Together, this study demonstrates that autophagic flux is impaired, meanwhile NSP restores autophagic flux and promotes functional recovery after SCI in rats.
Collapse
Affiliation(s)
- Zheng Li
- Department of Orthopaedics, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Fubing Liu
- Department of Orthopaedics, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
- Department of Spine Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China
| | - Liang Zhang
- Department of Orthopaedics, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Yuanwu Cao
- Department of Orthopaedics, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Yunchao Shao
- Department of Orthopaedics, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Xiaofeng Wang
- Department of Orthopaedics, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Xiaoxing Jiang
- Department of Orthopaedics, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Zixian Chen
- Department of Orthopaedics, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| |
Collapse
|
20
|
Guo X, Zhang G, Chen L, Khan AA, Gu B, Li B. Newborn Neurons Are Damaged In Vitro by a Low Concentration of Silver Nanoparticles Through the Inflammatory Oxidative Stress Pathway. DNA Cell Biol 2017; 36:1062-1070. [PMID: 29058455 DOI: 10.1089/dna.2017.3795] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
With increasing applications of nanomaterials, including silver nanoparticles (AgNPs), unknown potential risks are present against humans and the environment, especially to the fetus and neonates, which are more sensitive to the cytotoxicity of such agents. This study focused on the effects of AgNP exposure on newborn neurons differentiated from neural stem cells (NSCs) in vitro. We isolated NSCs from fetal rat hippocampus and incubated them in neural differentiation medium for 3-7 days to form newborn neurons and networks. After exposure to 2 μg/mL AgNPs, cell viability was reduced, and early neuronal processes and extensions were fragmented. Furthermore, AgNP treatment increased cellular superoxide dismutase activity and decreased the mitochondrial membrane potential, leading to neuronal death. AgNPs also increased the expression of FOXO3 and decreased nuclear factor-erythroid 2-related factor-2, as well as stimulated the formation of autophagosomes. Therefore, even a low concentration of AgNPs can interrupt early neuronal processes, and facilitate neuron apoptosis by increased cellular oxidative stress and mitochondrial disruption. Thus, it is necessary to note the daily exposure of nanomaterials (e.g., AgNPs) to pregnant women and infants, which may cause neurodevelopmental disorders.
Collapse
Affiliation(s)
- Xiaoyuan Guo
- Department of Neurosurgery, Zhongda Hospital, School of Medicine, Southeast University , Nanjing, China
| | - Guilong Zhang
- Department of Neurosurgery, Zhongda Hospital, School of Medicine, Southeast University , Nanjing, China
| | - Lukui Chen
- Department of Neurosurgery, Zhongda Hospital, School of Medicine, Southeast University , Nanjing, China
| | - Ahsan Ali Khan
- Department of Neurosurgery, Zhongda Hospital, School of Medicine, Southeast University , Nanjing, China
| | - Bin Gu
- Department of Neurosurgery, Zhongda Hospital, School of Medicine, Southeast University , Nanjing, China
| | - Bingqian Li
- Department of Neurosurgery, Zhongda Hospital, School of Medicine, Southeast University , Nanjing, China
| |
Collapse
|
21
|
Abstract
Autophagy comprises the processes of autophagosome synthesis and lysosomal degradation. In certain stress conditions, increased autophagosome synthesis may be associated with decreased lysosomal activity, which may result in reduced processing of the excessive autophagosomes by the rate-limiting lysosomal activity. Thus, the excessive autophagosomes in such situations may be largely unfused to lysosomes, and their formation/accumulation under these conditions is assumed to be futile for autophagy. The role of cytotoxicity in accumulating autophagosomes (representing synthesis of autophagosomes subsequently unfused to lysosomes) has not been investigated previously. Here, we found that accumulation of autophagosomes compromised cell viability, and this effect was alleviated by depletion of autophagosome machinery proteins. We tested whether reduction in autophagosome synthesis could affect cell viability in cell models expressing mutant huntingtin and α-synuclein, given that both of these proteins cause increased autophagosome biogenesis and compromised lysosomal activity. Importantly, partial depletion of autophagosome machinery proteins Atg16L1 and Beclin 1 significantly ameliorated cell death in these conditions. Our data suggest that production/accumulation of autophagosomes subsequently unfused to lysosomes (or accumulation of autophagosomes) directly induces cellular toxicity, and this process may be implicated in the pathogenesis of neurodegenerative diseases. Therefore, lowering the accumulation of autophagosomes may represent a therapeutic strategy for tackling such diseases.
Collapse
Affiliation(s)
- Robert W Button
- From the Peninsula Schools of Medicine and Dentistry, Institute of Translational and Stratified Medicine, University of Plymouth, Research Way, Plymouth PL6 8BU, United Kingdom
| | - Sheridan L Roberts
- From the Peninsula Schools of Medicine and Dentistry, Institute of Translational and Stratified Medicine, University of Plymouth, Research Way, Plymouth PL6 8BU, United Kingdom
| | - Thea L Willis
- From the Peninsula Schools of Medicine and Dentistry, Institute of Translational and Stratified Medicine, University of Plymouth, Research Way, Plymouth PL6 8BU, United Kingdom
| | - C Oliver Hanemann
- From the Peninsula Schools of Medicine and Dentistry, Institute of Translational and Stratified Medicine, University of Plymouth, Research Way, Plymouth PL6 8BU, United Kingdom
| | - Shouqing Luo
- From the Peninsula Schools of Medicine and Dentistry, Institute of Translational and Stratified Medicine, University of Plymouth, Research Way, Plymouth PL6 8BU, United Kingdom
| |
Collapse
|
22
|
Wu DJ, Adamopoulos IE. Loss of WDFY3 ameliorates severity of serum transfer-induced arthritis independently of autophagy. Cell Immunol 2017; 316:61-69. [PMID: 28449847 DOI: 10.1016/j.cellimm.2017.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/26/2017] [Accepted: 04/10/2017] [Indexed: 11/16/2022]
Abstract
WDFY3 is a master regulator of selective autophagy that we recently showed to interact with TRAF6 and augment RANKL-induced osteoclastogenesis in vitro and in vivo via the NF-κB pathway. Since the NF-κB pathway plays a major role in inflammation herein, we investigate the role of WDFY3 in an arthritis animal model. Our data show that WDFY3 conditional knockout mice (Wdfy3loxP/loxP-LysM-Cre+) were protected in the K/BxN serum transfer-induced arthritis animal model. These effects were independent of alterations in starvation-induced autophagy as evidenced by Western blot analysis of the autophagy marker LC3, autophagosome formation in osteoclast precursors and lysosome formation in osteoclasts derived from WDFY3-cKO mice compared to controls. Moreover, we demonstrate by immunofluorescence and co-immunoprecipitation that WDFY3 interacts with SQSTM1 in macrophages and osteoclasts. Collectively, our data suggest that loss of WDFY3 in myeloid cells leads to reduced severity of inflammatory arthritis independently of WDFY3 function in starvation-induced autophagy.
Collapse
Affiliation(s)
- Dennis J Wu
- Graduate Group in Immunology, University of California at Davis, USA; Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, USA
| | - Iannis E Adamopoulos
- Graduate Group in Immunology, University of California at Davis, USA; Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, USA; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Northern California, USA.
| |
Collapse
|
23
|
Golestaneh N, Chu Y, Xiao YY, Stoleru GL, Theos AC. Dysfunctional autophagy in RPE, a contributing factor in age-related macular degeneration. Cell Death Dis 2017; 8:e2537. [PMID: 28055007 PMCID: PMC5386365 DOI: 10.1038/cddis.2016.453] [Citation(s) in RCA: 220] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 12/17/2022]
Abstract
Age-related macular degeneration (AMD) is a devastating neurodegenerative disease and a major cause of blindness in the developed world. Owing to its complexity and the lack of an adequate human model that recapitulates key aspects of the disease, the molecular mechanisms of AMD pathogenesis remain poorly understood. Here we show that cultured human retinal pigment epithelium (RPE) from AMD donors (AMD RPE) are functionally impaired and exhibit distinct phenotypes compared with RPE cultured from normal donors (normal RPE). Accumulation of lipid droplets and glycogen granules, disintegration of mitochondria, and an increase in autophagosomes were observed in AMD RPE cultures. Compared with normal RPE, AMD RPE exhibit increased susceptibility to oxidative stress, produce higher levels of reactive oxygen species (ROS) under stress conditions, and showed reduced mitochondrial activity. Measurement of the ratio of LC3-II/ LC3-I, revealed impaired autophagy in AMD RPE as compared with normal RPE. Autophagic flux was also reduced in AMD RPE as compared with normal RPE, as shown by inability of AMD RPE to downregulate p62 levels during starvation. Impaired autophagic pathways were further shown by analyzing late autophagic vesicles; immunostaining with lysosome-associated membrane protein 1 (LAMP-1) antibody revealed enlarged and annular LAMP-1-positive organelles in AMD RPE as opposed to smaller discrete puncta observed in normal RPE. Our study provides insights into AMD cellular and molecular mechanisms, proposes dysfunctional autophagy as an underlying mechanism contributing to the pathophysiology of the disease, and opens up new avenues for development of novel treatment strategies.
Collapse
Affiliation(s)
- Nady Golestaneh
- Department of Ophthalmology, Georgetown University Medical Center, Washington, DC, USA
- Department of Neurology, Georgetown University Medical Center, Washington, DC, USA
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, DC, USA
| | - Yi Chu
- Department of Ophthalmology, Georgetown University Medical Center, Washington, DC, USA
| | - Yang-Yu Xiao
- Department of Ophthalmology, Georgetown University Medical Center, Washington, DC, USA
| | - Gianna L Stoleru
- Department of Ophthalmology, Georgetown University Medical Center, Washington, DC, USA
| | - Alexander C Theos
- Department of Human Science, Georgetown University, Washington, DC, USA
| |
Collapse
|
24
|
Huang FC. Vitamin D differentially regulates Salmonella-induced intestine epithelial autophagy and interleukin-1β expression. World J Gastroenterol 2016; 22:10353-10363. [PMID: 28058015 PMCID: PMC5175247 DOI: 10.3748/wjg.v22.i47.10353] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 09/21/2016] [Accepted: 10/27/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the effects of active vitamin D3 on autophagy and interleukin (IL)-1β expression in Salmonella-infected intestinal epithelial cells (IECs).
METHODS Caco-2 cells, NOD2 siRNA-, Atg16L1 siRNA- or vitamin D receptor (VDR) siRNA-transfected Caco-2 cells were pretreated with 1,25-dihydroxyvitamin D3 (1,25D3), and then infected by wild-type S. typhimurium strain SL1344. The conversion of LC3-I to LC3-II was detected by Western blot analysis and LC3+ autophagosome was analyzed by immunofluorescence. Caco-2 cells or VDR siRNA-transfected cells were pretreated with 1,25D3, and then infected by SL1344. Membrane protein and total RNA were analyzed by Western blot and RT-PCR for VDR and Atg16L1 protein and mRNA expression, respectively. Atg16L1 siRNA-transfected Caco-2 cells were pretreated by 1,25D3 and then infected with SL1344. Total RNA was analyzed by RT-PCR for IL-1β mRNA expression.
RESULTS The active form of vitamin D, 1,25D3, showed enhanced VDR-mediated Atg16L1 mRNA expression, membranous Atg16L1 protein expression leading to enhanced autophagic LC3II protein expression and LC3 punctae in Salmonella-infected Caco-2 cells which was counteracted by Atg16L1 and VDR siRNA, but Atg16L1 mediated suppression of IL-1β expression. Thus, active vitamin D may enhance autophagy but suppress inflammatory IL-1β expression in Salmonella-infected IECs.
CONCLUSION Active vitamin D might enhance autophagic clearance of Salmonella infection, while modulation of inflammatory responses prevents the host from detrimental effects of overwhelming inflammation.
Collapse
|
25
|
Haack TB, Ignatius E, Calvo-Garrido J, Iuso A, Isohanni P, Maffezzini C, Lönnqvist T, Suomalainen A, Gorza M, Kremer LS, Graf E, Hartig M, Berutti R, Paucar M, Svenningsson P, Stranneheim H, Brandberg G, Wedell A, Kurian MA, Hayflick SA, Venco P, Tiranti V, Strom TM, Dichgans M, Horvath R, Holinski-Feder E, Freyer C, Meitinger T, Prokisch H, Senderek J, Wredenberg A, Carroll CJ, Klopstock T. Absence of the Autophagy Adaptor SQSTM1/p62 Causes Childhood-Onset Neurodegeneration with Ataxia, Dystonia, and Gaze Palsy. Am J Hum Genet 2016; 99:735-743. [PMID: 27545679 PMCID: PMC5010644 DOI: 10.1016/j.ajhg.2016.06.026] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 06/27/2016] [Indexed: 11/17/2022] Open
Abstract
SQSTM1 (sequestosome 1; also known as p62) encodes a multidomain scaffolding protein involved in various key cellular processes, including the removal of damaged mitochondria by its function as a selective autophagy receptor. Heterozygous variants in SQSTM1 have been associated with Paget disease of the bone and might contribute to neurodegeneration in amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Using exome sequencing, we identified three different biallelic loss-of-function variants in SQSTM1 in nine affected individuals from four families with a childhood- or adolescence-onset neurodegenerative disorder characterized by gait abnormalities, ataxia, dysarthria, dystonia, vertical gaze palsy, and cognitive decline. We confirmed absence of the SQSTM1/p62 protein in affected individuals' fibroblasts and found evidence of a defect in the early response to mitochondrial depolarization and autophagosome formation. Our findings expand the SQSTM1-associated phenotypic spectrum and lend further support to the concept of disturbed selective autophagy pathways in neurodegenerative diseases.
Collapse
Affiliation(s)
- Tobias B Haack
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany.
| | - Erika Ignatius
- Research Programs Unit, Molecular Neurology, University of Helsinki, 00290 Helsinki, Finland; Department of Child Neurology, Children's Hospital, University of Helsinki and Helsinki University Hospital, 00029 HUS, Finland
| | - Javier Calvo-Garrido
- Department of Molecular Medicine and Surgery, Science for Life Laboratory, Karolinska Institutet, Stockholm 17176, Sweden
| | - Arcangela Iuso
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Pirjo Isohanni
- Research Programs Unit, Molecular Neurology, University of Helsinki, 00290 Helsinki, Finland; Department of Child Neurology, Children's Hospital, University of Helsinki and Helsinki University Hospital, 00029 HUS, Finland
| | - Camilla Maffezzini
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 17177, Sweden
| | - Tuula Lönnqvist
- Department of Child Neurology, Children's Hospital, University of Helsinki and Helsinki University Hospital, 00029 HUS, Finland
| | - Anu Suomalainen
- Research Programs Unit, Molecular Neurology, University of Helsinki, 00290 Helsinki, Finland
| | - Matteo Gorza
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Laura S Kremer
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Elisabeth Graf
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Monika Hartig
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany
| | - Riccardo Berutti
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Martin Paucar
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm 17176, Sweden
| | - Per Svenningsson
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm 17176, Sweden
| | - Henrik Stranneheim
- Department of Molecular Medicine and Surgery, Science for Life Laboratory, Karolinska Institutet, Stockholm 17176, Sweden; Centre for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm 17176, Sweden
| | - Göran Brandberg
- Department of Pediatrics, Falu lasarett, 79182 Falun, Sweden
| | - Anna Wedell
- Department of Molecular Medicine and Surgery, Science for Life Laboratory, Karolinska Institutet, Stockholm 17176, Sweden; Centre for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm 17176, Sweden
| | - Manju A Kurian
- Neurosciences Unit, Institute of Child Health, University College London, London WC1N 3BG, UK; Department of Paediatric Neurology, Great Ormond Street Hospital, London WC1N 3BG, UK
| | - Susan A Hayflick
- Department of Pediatrics, Oregon Health & Science University, Portland, OR 97239, USA; Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR 97239, USA; Department of Neurology, Oregon Health & Science University, Portland, OR 97239, USA
| | - Paola Venco
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta," 20126 Milan, Italy
| | - Valeria Tiranti
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta," 20126 Milan, Italy
| | - Tim M Strom
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Martin Dichgans
- Institute for Stroke and Dementia Research, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), 80336 Munich, Germany; DZNE - German Center for Neurodegenerative Diseases, 80336 Munich, Germany
| | - Rita Horvath
- MGZ - Medical Genetics Center, 80335 Munich, Germany; Institute of Genetic Medicine, MRC Centre for Neuromuscular Diseases, Newcastle University, Newcastle upon Tyne NE1 3BZ, UK
| | | | - Christoph Freyer
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 17177, Sweden; Centre for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm 17176, Sweden
| | - Thomas Meitinger
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany; Munich Cluster for Systems Neurology (SyNergy), 80336 Munich, Germany
| | - Holger Prokisch
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Jan Senderek
- Department of Neurology, Friedrich-Baur-Institute, Ludwig-Maximilians-University, 80336 Munich, Germany
| | - Anna Wredenberg
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 17177, Sweden; Centre for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm 17176, Sweden
| | - Christopher J Carroll
- Research Programs Unit, Molecular Neurology, University of Helsinki, 00290 Helsinki, Finland
| | - Thomas Klopstock
- Munich Cluster for Systems Neurology (SyNergy), 80336 Munich, Germany; DZNE - German Center for Neurodegenerative Diseases, 80336 Munich, Germany; Department of Neurology, Friedrich-Baur-Institute, Ludwig-Maximilians-University, 80336 Munich, Germany.
| |
Collapse
|
26
|
Hu S, Li X, Xu R, Ye L, Kong H, Zeng X, Wang H, Xie W. The synergistic effect of resveratrol in combination with cisplatin on apoptosis via modulating autophagy in A549 cells. Acta Biochim Biophys Sin (Shanghai) 2016; 48:528-35. [PMID: 27084520 DOI: 10.1093/abbs/gmw026] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/16/2016] [Indexed: 01/07/2023] Open
Abstract
Several studies have shown that combination treatment with natural products and chemotherapy agents can improve the sensitivity and cytotoxicity of chemotherapy agents. Resveratrol, a natural product, has many biological effects including antitumor and antiviral activities, as well as vascular protective effect. The aim of this study is to investigate the synergistic anticancer effect of resveratrol in combination with cisplatin and the potential anticancer mechanisms involved in A549 cells. The results obtained from Cell Counting Kit-8 and isobolographic analysis demonstrated that combination of resveratrol and cisplatin resulted in synergistic cytotoxic effects in A549 cells. Results from Hoechst staining, flow cytometry and western blot analysis suggested that resveratrol enhanced cisplatin-mediated apoptosis. Meanwhile, the changes of LC3-II and P62 levels and formation of autophagosome suggested that resveratrol in combination with cisplatin triggered autophagy. More importantly, inhibiting autophagy by 3-methyladenine markedly attenuated the apoptosis caused by combination of resveratrol and cisplatin in A549 cells. Taken together, our study provides the first evidence that resveratrol combined with cisplatin synergistically induce apoptosis via modulating autophagic cell death in A549 cells. These findings also help us to understand the role of natural products in combination with chemotherapy agents in lung cancer.
Collapse
Affiliation(s)
- Song Hu
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xiaolin Li
- Department of Geriatric Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Rongrong Xu
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Lingyun Ye
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Hui Kong
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xiaoning Zeng
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Hong Wang
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Weiping Xie
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| |
Collapse
|
27
|
Corcelle-Termeau E, Vindeløv SD, Hämälistö S, Mograbi B, Keldsbo A, Bräsen JH, Favaro E, Adam D, Szyniarowski P, Hofman P, Krautwald S, Farkas T, Petersen NH, Rohde M, Linkermann A, Jäättelä M. Excess sphingomyelin disturbs ATG9A trafficking and autophagosome closure. Autophagy 2016; 12:833-49. [PMID: 27070082 PMCID: PMC4854555 DOI: 10.1080/15548627.2016.1159378] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 02/10/2016] [Accepted: 02/23/2016] [Indexed: 11/21/2022] Open
Abstract
Sphingomyelin is an essential cellular lipid that traffics between plasma membrane and intracellular organelles until directed to lysosomes for SMPD1 (sphingomyelin phosphodiesterase 1)-mediated degradation. Inactivating mutations in the SMPD1 gene result in Niemann-Pick diseases type A and B characterized by sphingomyelin accumulation and severely disturbed tissue homeostasis. Here, we report that sphingomyelin overload disturbs the maturation and closure of autophagic membranes. Niemann-Pick type A patient fibroblasts and SMPD1-depleted cancer cells accumulate elongated and unclosed autophagic membranes as well as abnormally swollen autophagosomes in the absence of normal autophagosomes and autolysosomes. The immature autophagic membranes are rich in WIPI2, ATG16L1 and MAP1LC3B but display reduced association with ATG9A. Contrary to its normal trafficking between plasma membrane, intracellular organelles and autophagic membranes, ATG9A concentrates in transferrin receptor-positive juxtanuclear recycling endosomes in SMPD1-deficient cells. Supporting a causative role for ATG9A mistrafficking in the autophagy defect observed in SMPD1-deficient cells, ectopic ATG9A effectively reverts this phenotype. Exogenous C12-sphingomyelin induces a similar juxtanuclear accumulation of ATG9A and subsequent defect in the maturation of autophagic membranes in healthy cells while the main sphingomyelin metabolite, ceramide, fails to revert the autophagy defective phenotype in SMPD1-deficient cells. Juxtanuclear accumulation of ATG9A and defective autophagy are also evident in tissues of smpd1-deficient mice with a subsequent inability to cope with kidney ischemia-reperfusion stress. These data reveal sphingomyelin as an important regulator of ATG9A trafficking and maturation of early autophagic membranes.
Collapse
Affiliation(s)
- Elisabeth Corcelle-Termeau
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Signe Diness Vindeløv
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Saara Hämälistö
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Baharia Mograbi
- Institute of Research on Cancer and Ageing of Nice (IRCAN), Université de Nice-Sophia Antipolis, Centre Antoine Lacassagne, Nice, France
| | - Anne Keldsbo
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | | | - Elena Favaro
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Dieter Adam
- Institute for Immunology, Christian-Albrechts-University, Kiel, Germany
| | - Piotr Szyniarowski
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Paul Hofman
- Institute of Research on Cancer and Ageing of Nice (IRCAN), Université de Nice-Sophia Antipolis, Centre Antoine Lacassagne, Nice, France
- Laboratory of Clinical and Experimental Pathology and Human Tissue Biobank/CRB INSERM, Pasteur Hospital and Faculty of Medicine, Nice, France
| | - Stefan Krautwald
- Division of Nephrology and Hypertension, Christian-Albrechts-University, Kiel, Germany
| | - Thomas Farkas
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Nikolaj H.T. Petersen
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Mikkel Rohde
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Andreas Linkermann
- Division of Nephrology and Hypertension, Christian-Albrechts-University, Kiel, Germany
| | - Marja Jäättelä
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, Copenhagen, Denmark
| |
Collapse
|