51
|
Zhao X, Yu Z, Lv Z, Meng L, Xu J, Yuan S, Fu Z. Activation of Alpha-7 Nicotinic Acetylcholine Receptors (α7nAchR) Promotes the Protective Autophagy in LPS-Induced Acute Lung Injury (ALI) In Vitro and In Vivo. Inflammation 2020; 42:2236-2245. [PMID: 31522340 DOI: 10.1007/s10753-019-01088-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The release of inflammatory cytokines and chemokines and autophagy has been reported to be involved in the pathogenic mechanism of acute lung injury (ALI). Reportedly, alpha-7 nicotinic acetylcholine receptors (α7nAchR) might play a protective role in LPS-induced ALI. In the current research, we established LPS-induced ALI model in mice and α7nAchR agonist PNU-282987 improved LPS-induced injury. In MH-S cells, LPS stimulation inhibited, whereas α7nAchR agonist PNU-282987 enhanced the autophagy. α7nAchR agonist PNU-282987 protected MH-S cells from LPS-induced inflammation by reducing the concentrations of IL-6, TNF-α, and IL-1β. Finally, LPS stimulation dramatically inhibited MH-S cell viability but enhanced cell apoptosis, whereas PNU-282987 treatment exerted opposite effects; α7nAchR might regulate the cellular homeostasis via affecting the crosstalk between the autophagy and apoptosis in MH-S cells; in other words, α7nAChR agonist enhances MH-S cell autophagy and inhibits MH-S cell apoptosis. In conclusion, α7nAchR promote the protective autophagy in LPS-induced ALI model in mice and MH-S cells. The application of α7nAchR agonist is considered a potent target for LPS-induced ALI, which needs further clinical investigation.
Collapse
Affiliation(s)
- Xin Zhao
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang Avenue, Wuhan, Hubei, People's Republic of China.,Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Zhizhong Yu
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang Avenue, Wuhan, Hubei, People's Republic of China.,Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Zheng Lv
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang Avenue, Wuhan, Hubei, People's Republic of China.,Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Lei Meng
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang Avenue, Wuhan, Hubei, People's Republic of China.,Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jiaxin Xu
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang Avenue, Wuhan, Hubei, People's Republic of China.,Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Shiying Yuan
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang Avenue, Wuhan, Hubei, People's Republic of China.,Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Zhaohui Fu
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1277, Jiefang Avenue, Wuhan, Hubei, People's Republic of China. .,Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| |
Collapse
|
52
|
Grasselli C, Carbone A, Panelli P, Giambra V, Bossi M, Mazzoccoli G, De Filippis L. Neural Stem Cells from Shank3-ko Mouse Model Autism Spectrum Disorders. Mol Neurobiol 2019; 57:1502-1515. [PMID: 31773410 DOI: 10.1007/s12035-019-01811-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 09/30/2019] [Indexed: 02/07/2023]
Abstract
Autism spectrum disorders (ASD) comprise a complex of neurodevelopmental disorders caused by a variety of genetic defects and characterized by alterations in social communication and repetitive behavior. Since the mechanisms leading to early neuronal degeneration remain elusive, we chose to examine the properties of NSCs isolated from an animal model of ASD in order to evaluate whether their neurogenic potential may recapitulate the early phases of neurogenesis in the brain of ASD patients. Mutations of the gene coding for the Shank3 protein play a key role in the impairment of brain development and synaptogenesis in ASD patients. Experiments here reported show that NSCs derived from the subventricular zone (SVZ) of adult Shank3Δ11-/- (Shank3-ko) mice retain self-renewal capacity in vitro, but differentiate earlier than wild-type (wt) cells, displaying an evident endosomal/lysosomal and ubiquitin aggregation in astroglial cells together with mitochondrial impairment and inflammasome activation, suggesting that glial degeneration likely contributes to neuronal damage in ASD. These in vitro observations obtained in our disease model are consistent with data in vivo obtained in ASD patients and suggest that Shank3 deficit could affect the late phases of neurogenesis and/or the survival of mature cells rather than NSC self-renewal. This evidence supports Shank3-ko NSCs as a reliable in vitro disease model and suggests the rescue of glial cells as a therapeutic strategy to prevent neuronal degeneration in ASD.
Collapse
Affiliation(s)
- C Grasselli
- Department of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy
| | - A Carbone
- Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, FG, Italy
| | - P Panelli
- Department of Regenerative Medicine, Fondazione IRCCS Casa Sollievo della Sofferenza, Via dei Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy
| | - V Giambra
- Department of Regenerative Medicine, Fondazione IRCCS Casa Sollievo della Sofferenza, Via dei Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy
| | - M Bossi
- Department of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy
| | - G Mazzoccoli
- Department of Medical Sciences, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, FG, Italy
| | - L De Filippis
- Department of Regenerative Medicine, Fondazione IRCCS Casa Sollievo della Sofferenza, Via dei Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy.
| |
Collapse
|
53
|
Giuliani A, Cirilli I, Prattichizzo F, Mensà E, Fulgenzi G, Sabbatinelli J, Graciotti L, Olivieri F, Procopio AD, Tiano L, Rippo MR. The mitomiR/Bcl-2 axis affects mitochondrial function and autophagic vacuole formation in senescent endothelial cells. Aging (Albany NY) 2019; 10:2855-2873. [PMID: 30348904 PMCID: PMC6224225 DOI: 10.18632/aging.101591] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/05/2018] [Indexed: 12/27/2022]
Abstract
During senescence, cells undergo distinctive biochemical and morphological changes and become dysfunctional. MiRNAs are involved in the senescence process and specific miRNAs can localize to mitochondria (mitomiRs). We hypothesized that part of the typical alterations of senescence may depends on mitomiRs deregulation. Therefore, we thoroughly explored the phenotype of human endothelial cells undergoing replicative senescence (sHUVECs) and observed elongated/branched mitochondria, accumulation of autophagic vacuoles (AVs), increased ROS and IL-1β production and reduced expression of Bcl-2 compared to younger cells (yHUVECs). Despite these pro-apoptotic features, sHUVECs are more resistant to serum deprivation, conceivably due to development of pro-survival strategies such as upregulation of Bcl-xL and Survivin. We demonstrate that mitomiR-181a, -34a, and -146a, are overexpressed and localize to mitochondria in sHUVECs compared with yHUVECs and that they: i) down-regulate Bcl-2, ii) induce permeability transition pore opening and activation of caspase-1 and 3, iii) affect sensitivity to apoptosis and iv) promote the conversion of LC3-I to LC3-II. Overall, we document for the first time that some mitomiRs can act as mediators of the multiple but functionally linked biochemical and morphological changes that characterize aging cells and that they can promote different cellular outcomes according to the senescence status of the cell.
Collapse
Affiliation(s)
- Angelica Giuliani
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Ancona, Italy
| | - Ilenia Cirilli
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | | | - Emanuela Mensà
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Ancona, Italy
| | - Gianluca Fulgenzi
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Ancona, Italy.,Neural Development Section, Mouse Cancer Genetics Program, CCR, NCI, Frederick, MD 21702, USA
| | - Jacopo Sabbatinelli
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Ancona, Italy
| | - Laura Graciotti
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Ancona, Italy
| | - Fabiola Olivieri
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Ancona, Italy.,Center of Clinical Pathology and Innovative Therapy, IRCCS INRCA National Institute, Ancona, Italy
| | - Antonio Domenico Procopio
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Ancona, Italy.,Center of Clinical Pathology and Innovative Therapy, IRCCS INRCA National Institute, Ancona, Italy
| | - Luca Tiano
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - Maria Rita Rippo
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Ancona, Italy
| |
Collapse
|
54
|
Meng L, Jan SZ, Hamer G, van Pelt AM, van der Stelt I, Keijer J, Teerds KJ. Preantral follicular atresia occurs mainly through autophagy, while antral follicles degenerate mostly through apoptosis. Biol Reprod 2019; 99:853-863. [PMID: 29767707 DOI: 10.1093/biolre/ioy116] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 05/11/2018] [Indexed: 12/16/2022] Open
Abstract
There is a general agreement that granulosa cell apoptosis is the cause of antral follicle attrition. Less clear is whether this pathway is also activated in case of preantral follicle degeneration, as several reports mention that the incidence of granulosa cell apoptosis in preantral follicles is negligible. Our objective is therefore to determine which cell-death pathways are involved in preantral and antral follicular degeneration.Atretic preantal and antral follicles were investigated using immunohistochemistry and laser-capture microdissection followed by quantitative real-time reverse transcription polymerase chain reaction. Microtubule-associated light-chain protein 3 (LC3), sequestosome 1 (SQSTM1/P62), Beclin1, autophagy-related protein 7 (ATG7), and cleaved caspase 3 (cCASP3) were used as markers for autophagy and apoptosis, respectively. P62 immunostaining was far less intense in granulosa cells of atretic compared to healthy preantral follicles, while no difference in LC3 and BECLIN1 immunostaining intensity was observed. This difference in P62 immunostaining was not observed in atretic antral follicles. mRNA levels of LC3 and P62 were not different between healthy and atretic (pre)antral follicles. ATG7 immunostaining was observed in granulosa cells of preantral atretic follicles, not in granulosa cells of degenerating antral follicles. The number of cCASP3-positive cells was negligible in preantral atretic follicles, while numerous in atretic antral follicles. Taken together, we conclude that preantral and antral follicular atresia is the result of activation of different cell-death pathways as antral follicular degeneration is initiated by massive granulosa cell apoptosis, while preantral follicular atresia occurs mainly via enhanced granulosa cell autophagy.
Collapse
Affiliation(s)
- Li Meng
- Human and Animal Physiology, Wageningen University, P.O. Box 338, Wageningen, The Netherlands.,National Engineering Research Center For Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, P.R. China
| | - Sabrina Z Jan
- Reproductive Biology Laboratory, Academic Medical Center, University of Amsterdam, Q3.119, Meibergdreef 9, Amsterdam, the Netherlands
| | - Geert Hamer
- Reproductive Biology Laboratory, Academic Medical Center, University of Amsterdam, Q3.119, Meibergdreef 9, Amsterdam, the Netherlands
| | - Ans M van Pelt
- Reproductive Biology Laboratory, Academic Medical Center, University of Amsterdam, Q3.119, Meibergdreef 9, Amsterdam, the Netherlands
| | - Inge van der Stelt
- Human and Animal Physiology, Wageningen University, P.O. Box 338, Wageningen, The Netherlands
| | - Jaap Keijer
- Human and Animal Physiology, Wageningen University, P.O. Box 338, Wageningen, The Netherlands
| | - Katja J Teerds
- Human and Animal Physiology, Wageningen University, P.O. Box 338, Wageningen, The Netherlands
| |
Collapse
|
55
|
Lu R, Zhang YG, Xia Y, Sun J. Imbalance of autophagy and apoptosis in intestinal epithelium lacking the vitamin D receptor. FASEB J 2019; 33:11845-11856. [PMID: 31361973 DOI: 10.1096/fj.201900727r] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Apoptosis and autophagy are dynamic processes that determine the fate of cells. Vitamin D receptor (VDR) deficiency in the intestine leads to abnormal Paneth cells and impaired autophagy function. Here, we will elucidate the mechanisms of the intestinal epithelial VDR regulation of autophagy and apoptosis. We used in vivo VDRlox and VDR∆IEC mice and ex vivo organoids generated from small intestine and colon tissues. We found that VDR deficiency induced more apoptotic cells and significantly increased cell death in the small intestine and colon of VDR∆IEC mice. The proapoptotic protein B-cell lymphoma 2 (BCL-2) associated X protein (Bax) was enhanced, whereas autophagy related 16 like 1 (ATG16L1) and Beclin-1 were decreased in the intestines of VDRΔIEC mice. Apoptosis induced by Bax reduced autophagy by decreasing Beclin-1. Physical interactions between Beclin-1 and Bcl-2 were increased in the VDR-deficient epithelia from mice. The growth of VDR∆IEC organoids was significantly slower with fewer Paneth cells than that of VDR+/+ organoids. The expression levels of Beclin-1 and lysozyme were decreased in VDR∆IEC organoids. Bacterial endotoxin levels were high in the serum from VDR∆IEC mice and made mice susceptible to colitis. In the organoids and colitis IL-10-/- mice, vitamin D3 treatment increased VDR and ATG16L1 protein expression levels, which activated autophagic responses. In summary, intestinal epithelial VDR regulates autophagy and apoptosis through ATG16L1 and Beclin-1. Our studies provide fundamental insights into the tissue-specific function of VDR in modulating the balance between autophagy and apoptosis.-Lu, R., Zhang, Y.-G., Xia, Y., Sun, J. Imbalance of autophagy and apoptosis in intestinal epithelium lacking the vitamin D receptor.
Collapse
Affiliation(s)
- Rong Lu
- Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Yong-Guo Zhang
- Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Yinglin Xia
- Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Jun Sun
- Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA.,Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, Illinois, USA.,University of Illinois Cancer Center, University of Illinois at Chicago, Chicago, Illinois, USA
| |
Collapse
|
56
|
Fan P, Wang N, Wang L, Xie X-Q. Autophagy and Apoptosis Specific Knowledgebases-guided Systems Pharmacology Drug Research. Curr Cancer Drug Targets 2019; 19:716-728. [PMID: 30727895 DOI: 10.2174/1568009619666190206122149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 11/20/2018] [Accepted: 01/30/2019] [Indexed: 01/12/2023]
Abstract
BACKGROUND Autophagy and apoptosis are the basic physiological processes in cells that clean up aged and mutant cellular components or even the entire cells. Both autophagy and apoptosis are disrupted in most major diseases such as cancer and neurological disorders. Recently, increasing attention has been paid to understand the crosstalk between autophagy and apoptosis due to their tightly synergetic or opposite functions in several pathological processes. OBJECTIVE This study aims to assist autophagy and apoptosis-related drug research, clarify the intense and complicated connections between two processes, and provide a guide for novel drug development. METHODS We established two chemical-genomic databases which are specifically designed for autophagy and apoptosis, including autophagy- and apoptosis-related proteins, pathways and compounds. We then performed network analysis on the apoptosis- and autophagy-related proteins and investigated the full protein-protein interaction (PPI) network of these two closely connected processes for the first time. RESULTS The overlapping targets we discovered show a more intense connection with each other than other targets in the full network, indicating a better efficacy potential for drug modulation. We also found that Death-associated protein kinase 1 (DAPK1) is a critical point linking autophagy- and apoptosis-related pathways beyond the overlapping part, and this finding may reveal some delicate signaling mechanism of the process. Finally, we demonstrated how to utilize our integrated computational chemogenomics tools on in silico target identification for small molecules capable of modulating autophagy- and apoptosis-related pathways. CONCLUSION The knowledge-bases for apoptosis and autophagy and the integrated tools will accelerate our work in autophagy and apoptosis-related research and can be useful sources for information searching, target prediction, and new chemical discovery.
Collapse
Affiliation(s)
- Peihao Fan
- Department of Pharmaceutical Sciences and Computational Chemical Genomics Screening Center, University of Pittsburgh, 3501 Terrace Street, PA, United States
| | - Nanyi Wang
- School of Pharmacy, University of Pittsburgh, 335 Sutherland Drive, 206 Salk Pavilion, PA, United States
| | - Lirong Wang
- School of Pharmacy, University of Pittsburgh, 335 Sutherland Drive, 206 Salk Pavilion, PA, United States
| | - Xie X-Q
- School of Pharmacy, University of Pittsburgh, 335 Sutherland Drive, 206 Salk Pavilion, PA, United States
| |
Collapse
|
57
|
Jiang X, Niu X, Guo Q, Dong Y, Xu J, Yin N, Qi Q, Jia Y, Gao L, He Q, Lv P. FoxO1-mediated autophagy plays an important role in the neuroprotective effects of hydrogen in a rat model of vascular dementia. Behav Brain Res 2019; 356:98-106. [DOI: 10.1016/j.bbr.2018.05.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/21/2018] [Accepted: 05/24/2018] [Indexed: 12/15/2022]
|
58
|
Li Z, Li Q, Lv W, Jiang L, Geng C, Yao X, Shi X, Liu Y, Cao J. The interaction of Atg4B and Bcl-2 plays an important role in Cd-induced crosstalk between apoptosis and autophagy through disassociation of Bcl-2-Beclin1 in A549 cells. Free Radic Biol Med 2019; 130:576-591. [PMID: 30458278 DOI: 10.1016/j.freeradbiomed.2018.11.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 10/23/2018] [Accepted: 11/16/2018] [Indexed: 12/31/2022]
Abstract
Cadmium (Cd) is a highly ubiquitous detrimental metal in the environment. It is a well-known inducer of tumorigenesis, but the mechanism is not clear. In our previous study, we found that ROS-dependent Atg4B upregulation mediated Cd-induced autophagy and autophagy played an important role in Cd-induced proliferation and invasion in A549 cells. In this study, we found that Cd induced both apoptosis and autophagy in A549 cells, and apoptosis preceded autophagy. Z-VAD-FMK repressed Cd-induced LC3 and Beclin1, indicating that apoptosis was essential for Cd-induced autophagy. 3MA destroyed the recovery of mitochondrial membrane potential and increased Cd-induced CL-CASP9 and CL-CASP3 expression, suggesting that Cd-induced autophagy prevented A549 cells from apoptosis. Further study showed that Atg4B upregulation was mediated by mitochondrial dysfunction and conversely affected mitochondrial function by decreasing Bcl-2 protein expression and its localization in mitochondria, and played an important role in Cd-induced apoptosis. Moreover, Bcl-2 was involved in Cd-induced autophagy. Co-IP assay showed that Atg4B could directly bind to Bcl-2, and consequently promote disassociation of Bcl-2-Beclin1 and released autophagic protein Beclin1 to activate autophagic pathway. Taken together, our results demonstrated that the interaction of Atg4B and Bcl-2 might play an important role in Cd-induced crosstalk between apoptosis and autophagy through disassociation of Bcl-2-Beclin1. Cd-induced autophagy is apoptosis-dependent and prevents apoptotic cell death to ensure the growth and proliferation of A549 cells.
Collapse
Affiliation(s)
- Zhiguo Li
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Qiujuan Li
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Wei Lv
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Liping Jiang
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Chengyan Geng
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Xiaofeng Yao
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Xiaoxia Shi
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Yong Liu
- School of Life Science and Medicine, Dalian University of Technology, Panjin 124221, China.
| | - Jun Cao
- Department of Occupational and Environmental Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China.
| |
Collapse
|
59
|
Morsi M, Kobeissy F, Magdeldin S, Maher A, Aboelmagd O, Johar D, Bernstein L. A shared comparison of diabetes mellitus and neurodegenerative disorders. J Cell Biochem 2018; 120:14318-14325. [PMID: 30565720 DOI: 10.1002/jcb.28094] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 10/29/2018] [Indexed: 11/09/2022]
Abstract
Diabetes mellitus (DM), one of the most prevalent metabolic diseases in the world population, is associated with a number of comorbid conditions including obesity, pancreatic endocrine changes, and renal and cardio-cerebrovascular alterations, coupled with peripheral neuropathy and neurodegenerative disease, some of these disorders are bundled into metabolic syndrome. Type 1 DM (T1DM) is an autoimmune disease that destroys the insulin-secreting islet cells. Type 2 DM (T2DM) is diabetes that is associated with an imbalance in the glucagon/insulin homeostasis that leads to the formation of amyloid deposits in the brain, pancreatic islet cells, and possibly in the kidney glomerulus. There are several layers of molecular pathologic alterations that contribute to the DM metabolic pathophysiology and its associated neuropathic manifestations. In this review, we describe the general signature metabolic features of DM and the cross-talk with neurodegeneration. We will assess the underlying molecular key players associated with DM-induced neuropathic disorders that are associated with both T1DM and T2DM. In this context, we will highlight the role of tau and amyloid protein deposits in the brain as well in the pancreatic islet cells, and possibly in the kidney glomerulus. Furthermore, we will discuss the central role of mitochondria, oxidative stress, and the unfolded protein response in mediating the DM-associated neuropathic degeneration. This study will elucidate the relationship between DM and neurodegeneration which may account for the evolution of other neurodegenerative diseases, particularly Alzheimer's disease and Parkinson's disease as discussed later.
Collapse
Affiliation(s)
- Mahmoud Morsi
- Faculty of Medicine, Menoufia University, Shebin El-kom, Egypt
| | - Firas Kobeissy
- Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
| | - Sameh Magdeldin
- Proteomics and Metabolomics Unit, Basic Research, Children's Cancer Hospital, Cairo, Egypt.,Physiology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Ahmed Maher
- Zoonotic Diseases Department, National Research Center, Dokki, Egypt
| | | | - Dina Johar
- Department of Biochemistry and Nutrition, Faculty of Women for Arts, Sciences and Education, Ain Shams University, Cairo, Egypt.,Department of Physiology and Pathophysiology, Faculty of Health Sciences, Rady College of Medicine, Max Rady University of Manitoba, Winnipeg, Canada
| | | |
Collapse
|
60
|
Li F, Yang B, Li T, Gong X, Zhou F, Hu Z. HSPB8 over-expression prevents disruption of blood-brain barrier by promoting autophagic flux after cerebral ischemia/reperfusion injury. J Neurochem 2018; 148:97-113. [PMID: 30422312 DOI: 10.1111/jnc.14626] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/13/2018] [Accepted: 10/24/2018] [Indexed: 12/24/2022]
Abstract
Heat-shock protein B8 (HSPB8) has been recently reported to confer neuroprotection against ischemia/reperfusion (I/R)-induced cerebral injury in vivo and in vitro. However, the molecular mechanism is still elusive. This study focused on the effect of intracerebroventricular (i.c.v) delivery of lenti-HSPB8 virus against neurological injury in a rat model of cerebral I/R and explored the underlying mechanism. We found that lentivirus i.c.v injection-induced HSPB8 over-expression strongly alleviated infarct volume, improved neurobehavioral outcomes, and reduced brain edema in rat middle cerebral artery occlusion/reperfusion (MCAO/R) model. Concomitantly, HSPB8 over-expression noticeably prevented blood-brain barrier (BBB) disruption after cerebral I/R injury as indicated by the reduction in Evans blue leakage and IgG detection in the ipsilateral hemisphere compared with the vehicle group. Moreover, immunoblotting and immunofluorescence staining of tight junction proteins claudin-5 and occludin showed that HSPB8 over-expression prevented the degradation of these proteins induced by MCAO/R, which indicated the protective effect of HSPB8 on BBB. Western blotting and immunostaining techniques were also utilized to analyze the expression of the markers of autophagy. We found that HSPB8 over-expression promoted autophagic flux, evidenced by increased ratio of LC3 I/II, accumulation of Beclin-1 expression and enhanced p62 degradation. i.c.v injection of 15 μg autophagy inhibitor 3-methyladenine (3-MA) was applied at the onset of reperfusion. The results showed that 3-MA elicited a significant loss of the protective effect of HSPB8 against MCAO/R-induced neurological defect, Evans blue extravasation, and the loss tight junction proteins, suggesting that the BBB protective role of HSPB8 was, at least in part, mediated through autophagy. Collectively, HSPB8 may represent a potential therapeutic agent for preserving BBB integrity following cerebral I/R injury. OPEN SCIENCE BADGES: This article has received a badge for *Open Materials* because it provided all relevant information to reproduce the study in the manuscript. The complete Open Science Disclosure form for this article can be found at the end of the article. More information about the Open Practices badges can be found at https://cos.io/our-services/open-science-badges/. Cover Image for this issue: doi: 10.1111/jnc.14488.
Collapse
Affiliation(s)
- Fazhao Li
- Department of General Surgery, 2nd Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Binbin Yang
- Department of Neurology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Ting Li
- Department of Neurology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Xiyu Gong
- Department of Neurology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Fangfang Zhou
- Department of Neurology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Zhiping Hu
- Department of Neurology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| |
Collapse
|
61
|
Mejias NH, Martinez CC, Stephens ME, de Rivero Vaccari JP. Contribution of the inflammasome to inflammaging. JOURNAL OF INFLAMMATION-LONDON 2018; 15:23. [PMID: 30473634 PMCID: PMC6240324 DOI: 10.1186/s12950-018-0198-3] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 11/05/2018] [Indexed: 01/14/2023]
Abstract
Background Inflammation is a natural part of the aging process. This process is referred to as inflammaging. Inflammaging has been associated with deleterious outcomes in the aging brain in diseases such as Alzheimer’s disease and Parkinson’s disease. The inflammasome is a multi-protein complex of the innate immune response involved in the activation of caspase-1 and the processing of the inflammatory cytokines interleukin (IL)-1β and IL-18. We have previously shown that the inflammasome plays a role in the aging process in the brain. In this study, we analyzed the brain of young (3 months old) and aged (18 months old) mice for the expression of inflammasome proteins. Results Our findings indicate that the inflammasome proteins NLRC4, caspase-1, apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC), and IL-18 are elevated in the cytosol of cortical lysates in aged mice when compared to young. In addition, in the cytosolic fraction of hippocampal lysates in aged mice, we found an increase in NLRC4, caspase-1, caspase-11, ASC and IL-1β. Moreover, we found higher levels of ASC in the mitochondrial fraction of aged mice when compared to young, consistent with higher levels of the substrate of pyroptosis gasdermin-D (GSDM-D) and increased pyroptosome formation (ASC oligomerization). Importantly, in this study we obtained fibroblasts from a subject that donated his cells at three different ages (49, 52 and 64 years old (y/o)) and found that the protein levels of caspase-1 and ASC were higher at 64 than at 52 y/o. In addition, the 52 y/o cells were more susceptible to oxidative stress as determined by lactose dehydrogenase (LDH) release levels. However, this response was ameliorated by inhibition of the inflammasome with Ac-Tyr-Val-Ala-Asp-Chloromethylketone (Ac-YVAD-CMK). In addition, we found that the protein levels of ASC and IL-18 are elevated in the serum of subjects over the age of 45 y/o when compared to younger subjects, and that ASC was higher in Caucasians than Blacks and Hispanics, whereas IL-18 was higher in Caucasians than in blacks, regardless of age. Conclusions Taken together, our data indicate that the inflammasome contributes to inflammaging and that the inflammasome-mediated cell death mechanism of pyroptosis contributes to cell demise in the aging brain.
Collapse
Affiliation(s)
- Nancy H Mejias
- Department of Neurological Surgery, Lois Pope LIFE Center, The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, 1095 NW 14th Terrace, 3-25, Miami, FL 33136-1060 USA
| | - Camila C Martinez
- Department of Neurological Surgery, Lois Pope LIFE Center, The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, 1095 NW 14th Terrace, 3-25, Miami, FL 33136-1060 USA
| | - Marisa E Stephens
- Department of Neurological Surgery, Lois Pope LIFE Center, The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, 1095 NW 14th Terrace, 3-25, Miami, FL 33136-1060 USA
| | - Juan Pablo de Rivero Vaccari
- Department of Neurological Surgery, Lois Pope LIFE Center, The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, 1095 NW 14th Terrace, 3-25, Miami, FL 33136-1060 USA
| |
Collapse
|
62
|
Yun CW, Lee SH. The Roles of Autophagy in Cancer. Int J Mol Sci 2018; 19:ijms19113466. [PMID: 30400561 PMCID: PMC6274804 DOI: 10.3390/ijms19113466] [Citation(s) in RCA: 601] [Impact Index Per Article: 100.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 10/29/2018] [Accepted: 11/02/2018] [Indexed: 12/12/2022] Open
Abstract
Autophagy is an intracellular degradative process that occurs under several stressful conditions, including organelle damage, the presence of abnormal proteins, and nutrient deprivation. The mechanism of autophagy initiates the formation of autophagosomes that capture degraded components and then fuse with lysosomes to recycle these components. The modulation of autophagy plays dual roles in tumor suppression and promotion in many cancers. In addition, autophagy regulates the properties of cancer stem-cells by contributing to the maintenance of stemness, the induction of recurrence, and the development of resistance to anticancer reagents. Although some autophagy modulators, such as rapamycin and chloroquine, are used to regulate autophagy in anticancer therapy, since this process also plays roles in both tumor suppression and promotion, the precise mechanism of autophagy in cancer requires further study. In this review, we will summarize the mechanism of autophagy under stressful conditions and its roles in tumor suppression and promotion in cancer and in cancer stem-cells. Furthermore, we discuss how autophagy is a promising potential therapeutic target in cancer treatment.
Collapse
Affiliation(s)
- Chul Won Yun
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul 04401, Korea.
| | - Sang Hun Lee
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul 04401, Korea.
- Department of Biochemistry, Soonchunhyang University College of Medicine, Cheonan 31538, Korea.
| |
Collapse
|
63
|
Lapierre J, Rodriguez M, Ojha CR, El-Hage N. Critical Role of Beclin1 in HIV Tat and Morphine-Induced Inflammation and Calcium Release in Glial Cells from Autophagy Deficient Mouse. J Neuroimmune Pharmacol 2018; 13:355-370. [PMID: 29752681 PMCID: PMC6230516 DOI: 10.1007/s11481-018-9788-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 04/16/2018] [Indexed: 12/19/2022]
Abstract
We previously showed that autophagy is an important component in human immunodeficiency virus (HIV) replication and in the combined morphine-induced neuroinflammation in human astrocytes and microglia. Here we further studied the consequences of autophagy using glial cells of mice partially lacking the essential autophagy gene Atg6 (Beclin1) exposed to HIV Tat and morphine. Tat is known to cause an inflammatory response, increase calcium release, and possibly interact with autophagy pathway proteins. Following Tat exposure, autophagy-deficient (Becn1+/-) glial cells had significantly and consistently reduced levels in the pro-inflammatory cytokine IL-6 and the chemokines RANTES and MCP-1 when compared to Tat-treated cells from control (C57BL/6J) mice, suggesting an association between the inflammatory effects of Tat and Beclin1. Further, differences in RANTES and MCP-1 secretion between C57BL/6J and Becn1+/- glia treated with Tat and morphine also suggest a role of Beclin1 in the morphine-induced enhancement. Analysis of autophagy maturation by immunoblot suggests that Beclin1 may be necessary for Tat, and to a lesser extent morphine-induced arrest of the pathway as demonstrated by accumulation of the adaptor protein p62/SQSTM1 in C57BL/6J glia. Calcium release induced by Tat alone or in combination with morphine in C57BL/6J glia was significantly reduced in Becn1+/- glia while minimal interactive effect of Tat with morphine in the production of reactive oxygen or nitrogen species was detected in glia derived from Becn1+/- or C57BL/6J. Overall, the data establish a role of Beclin1 in Tat and morphine-mediated inflammatory responses and calcium release in glial cells and support the notion that autophagy mediates Tat alone and combined morphine-induced neuropathology.
Collapse
Affiliation(s)
- Jessica Lapierre
- Department of Immunology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL, 33199, USA
| | - Myosotys Rodriguez
- Department of Immunology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL, 33199, USA
| | - Chet Raj Ojha
- Department of Immunology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL, 33199, USA
| | - Nazira El-Hage
- Department of Immunology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL, 33199, USA.
| |
Collapse
|
64
|
Carter HN, Kim Y, Erlich AT, Zarrin‐khat D, Hood DA. Autophagy and mitophagy flux in young and aged skeletal muscle following chronic contractile activity. J Physiol 2018; 596:3567-3584. [PMID: 29781176 PMCID: PMC6092298 DOI: 10.1113/jp275998] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 05/02/2018] [Indexed: 12/12/2022] Open
Abstract
KEY POINTS A healthy mitochondrial pool is dependent on the removal of dysfunctional organelles via mitophagy, but little is known about how mitophagy is altered with ageing and chronic exercise. Chronic contractile activity (CCA) is a standardized exercise model that can elicit mitochondrial adaptations in both young and aged muscle, albeit to a lesser degree in the aged group. Assessment of mitophagy flux revealed enhanced targeting of mitochondria for degradation in aged muscle, in contrast to previous theories. Mitophagy flux was significantly reduced as an adaptation to CCA suggesting that an improvement in organelle quality reduces the need for mitochondrial turnover. CCA enhances lysosomal capacity and may ameliorate lysosomal dysfunction in aged muscle. ABSTRACT Skeletal muscle exhibits deficits in mitochondrial quality with age. Central to the maintenance of a healthy mitochondrial pool is the removal of dysfunctional organelles via mitophagy. Little is known on how mitophagy is altered with ageing and chronic exercise. We assessed mitophagy flux using colchicine treatment in vivo following chronic contractile activity (CCA) of muscle in young and aged rats. CCA evoked mitochondrial biogenesis in young muscle, with an attenuated response in aged muscle. Mitophagy flux was higher in aged muscle and was correlated with the enhanced expression of mitophagy receptors and upstream transcriptional regulators. CCA decreased mitophagy flux in both age groups, suggesting an improvement in organelle quality. CCA also reduced the exaggerated expression of TFEB evident in aged muscle, which may be promoting the age-induced increase in lysosomal markers. Thus, aged muscle possesses an elevated drive for autophagy and mitophagy which may contribute to the decline in organelle content observed with age, but which may serve to maintain mitochondrial quality. CCA improves organelle integrity and reduces mitophagy, illustrating that chronic exercise is a modality to improve muscle quality in aged populations.
Collapse
Affiliation(s)
- Heather N. Carter
- Muscle Health Research Centre, School of Kinesiology and Health ScienceYork UniversityTorontoOntarioM3J 1P3Canada
| | - Yuho Kim
- Muscle Health Research Centre, School of Kinesiology and Health ScienceYork UniversityTorontoOntarioM3J 1P3Canada
| | - Avigail T. Erlich
- Muscle Health Research Centre, School of Kinesiology and Health ScienceYork UniversityTorontoOntarioM3J 1P3Canada
| | - Dorrin Zarrin‐khat
- Muscle Health Research Centre, School of Kinesiology and Health ScienceYork UniversityTorontoOntarioM3J 1P3Canada
- Department of BiologyYork UniversityTorontoOntarioM3J 1P3Canada
| | - David A. Hood
- Muscle Health Research Centre, School of Kinesiology and Health ScienceYork UniversityTorontoOntarioM3J 1P3Canada
| |
Collapse
|
65
|
Yin H, Wu H, Chen Y, Zhang J, Zheng M, Chen G, Li L, Lu Q. The Therapeutic and Pathogenic Role of Autophagy in Autoimmune Diseases. Front Immunol 2018; 9:1512. [PMID: 30108582 PMCID: PMC6080611 DOI: 10.3389/fimmu.2018.01512] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/18/2018] [Indexed: 12/21/2022] Open
Abstract
Autophagy is a complicated cellular mechanism that maintains cellular and tissue homeostasis and integrity via degradation of senescent, defective subcellular organelles, infectious agents, and misfolded proteins. Accumulating evidence has shown that autophagy is involved in numerous immune processes, such as removal of intracellular bacteria, cytokine production, autoantigen presentation, and survival of lymphocytes, indicating an apparent and important role in innate and adaptive immune responses. Indeed, in genome-wide association studies, autophagy-related gene polymorphisms have been suggested to be associated with the pathogenesis of several autoimmune and inflammatory disorders, such as systemic lupus erythematosus, psoriasis, rheumatoid arthritis, inflammatory bowel disease, and multiple sclerosis. In addition, conditional knockdown of autophagy-related genes in mice displayed therapeutic effects on several autoimmune disease models by reducing levels of inflammatory cytokines and autoreactive immune cells. However, the inhibition of autophagy accelerates the progress of some inflammatory and autoimmune diseases via promotion of inflammatory cytokine production. Therefore, this review will summarize the current knowledge of autophagy in immune regulation and discuss the therapeutic and pathogenic role of autophagy in autoimmune diseases to broaden our understanding of the etiopathogenesis of autoimmune diseases and shed light on autophagy-mediated therapies.
Collapse
Affiliation(s)
- Heng Yin
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Haijing Wu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yongjian Chen
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Jianzhong Zhang
- Department of Dermatology, Peking University People's Hospital, Beijing, China
| | - Min Zheng
- Department of Dermatology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Genhui Chen
- Beijing Wenfeng Tianji Pharmaceuticals Ltd., Beijing, China
| | - Linfeng Li
- Department of Dermatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Qianjin Lu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
66
|
Tamoxifen overrides autophagy inhibition in Beclin-1-deficient glioma cells and their resistance to adenovirus-mediated oncolysis via upregulation of PUMA and BAX. Oncogene 2018; 37:6069-6082. [PMID: 29991800 DOI: 10.1038/s41388-018-0395-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 05/18/2018] [Accepted: 06/08/2018] [Indexed: 01/04/2023]
Abstract
Autophagy is an evolutionarily conserved process regulating cellular homeostasis via digestion of dysfunctional proteins and whole cellular organelles by mechanisms, involving their enclosure into double-membrane vacuoles that are subsequently fused to lysosomes. Glioma stem cells utilize autophagy as a main mechanism of cell survival and stress response. Most recently, we and others demonstrated induction of autophagy in gliomas in response to treatment with chemical drugs, such as temozolomide (TMZ) or oncolytic adenoviruses (Ads). As autophagy has been implicated in the mechanism of Ad-mediated cell killing, autophagy deficiency in some glioma tumors could be the reason for their resistance to oncolysis. Despite the observed connection, the exact relationship between autophagy-activating cell signaling and adenoviral infection remains unclear. Here, we report that inhibition of autophagy in target glioma cells induces their resistance to killing by oncolytic agent CRAd-S-5/3. Furthermore, we found that downregulation of autophagy inducer Beclin-1 inhibits replication-competent Ad-induced oncolysis of human glioma by suppressing cell proliferation and inducing premature senescence. To overcome the autophagy-deficient state of such glioma cells and restore their susceptibility to oncolytic Ad infection, we propose treating glioma tumors with an anticancer drug tamoxifen (TAM) as a means to induce apoptosis in Ad-targeted cancer cells via upregulation of BAX/PUMA genes. In agreement with the above hypothesis, our data suggest that TAM improves susceptibility of Beclin-1-deficient glioma cells to CRAd-S-5/3 oncolysis by means of activating autophagy and pro-apoptotic signaling pathways in the target cancer cells.
Collapse
|
67
|
Wan B, Zang Y, Wang L. Overexpression of Beclin1 inhibits proliferation and promotes apoptosis of human laryngeal squamous carcinoma cell Hep-2. Onco Targets Ther 2018; 11:3827-3833. [PMID: 30013363 PMCID: PMC6038865 DOI: 10.2147/ott.s148869] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Objective Beclin1 was previously found to be downregulated in human laryngeal cancer (LC) tissues, and it results in poor prognosis. This study aimed to further confirm the antitumor effects of Beclin1 in LC cell line Hep-2. Materials and methods Beclin 1 was overexpressed in Hep-2 cells using liposomal transfection and confirmed using reverse transcription polymerase chain reaction and Western blotting. Then, cell proliferation and apoptosis were determined in control (untransfected), empty vector transfected, and Beclin1 overexpressed groups using MTT and flow cytometry procedure, respectively. Results The expression of the Beclin1 gene in Hep-2 cells was significantly increased after vector transfection compared with control (1.173±0.046 vs 0.453±0.016, P<0.01) and empty vector (1.173±0.046 vs 0.440±0.021, P<0.01). Overexpression of Beclin1 inhibited proliferation at 4 days (0.619±0.051 vs 0.891±0.081 and 0.619±0.051 vs 0.878±0.105, P<0.01), 5 days (0.684±0.078 vs 1.127±0.094 and 0.684±0.078 vs 1.162±0.117, P<0.01), and 6 days (0.725±0.069 vs 1.168±0.103 and 0.725±0.069 vs 1.194±0.097, P<0.01) and promoted apoptosis (14.48%±1.42% vs 4.07%±0.66% and 14.48%±1.42% vs 4.39%±0.80%, P<0.01) in Hep-2 cells in comparison with the control and empty vector groups, respectively. Conclusion Beclin1 may be an underlying target for the treatment of LC. This study has provided some experimental basis for the gene therapy of LC.
Collapse
Affiliation(s)
- Baoluo Wan
- Department of Otorhinolaryngology, Henan Province People's Hospital, Zhengzhou, Henan Province, China,
| | - Yanzi Zang
- Department of Otorhinolaryngology, Henan Province People's Hospital, Zhengzhou, Henan Province, China,
| | - Lin Wang
- Department of Otorhinolaryngology, Henan Province People's Hospital, Zhengzhou, Henan Province, China,
| |
Collapse
|
68
|
Marcondes JPDC, Andrade PFB, Sávio ALV, Silveira MAD, Rudge MVC, Salvadori DMF. BCL2 and miR-181a transcriptional alterations in umbilical-cord blood cells can be putative biomarkers for obesity. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2018; 836:90-96. [PMID: 30442352 DOI: 10.1016/j.mrgentox.2018.06.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 04/17/2018] [Accepted: 06/01/2018] [Indexed: 10/14/2022]
Abstract
Several findings suggest that in utero stressor stimuli can alter fetal development by promoting transcriptional changes, and predisposing the neonate to diseases later in life. This study aimed to investigate whether a hyperglycemic environment in pregnant women with gestational diabetes mellitus (GDM) is able to cause fetal genetic alterations and predispose neonates to obesity. Transcriptional alteration of SIRT1, TP53 and BCL2 genes, miR-181a (a SIRT1 or BCL2 regulator) and telomere length were evaluated in placental and umbilical-cord blood cells. Healthy (HP; n = 20) and GDM (n = 20) pregnant women and their respective neonates were included in the study. Additionally, obese (n = 20) and eutrophic (n = 20) adults also participated as reference populations. Gene expression data showed down-regulation of BCL2 in umbilical-cord and peripheral blood cells from GDM neonates and obese adults, respectively. The miR-181a was down-regulated only in umbilical-cord blood cells of GDM neonates. Telomere length presented no significant difference. In conclusion, our study demonstrated that the GDM hyperglycemic intrauterine environment promotes transcriptional alterations in BCL2 and miR-181a in neonate umbilical-cord blood cells. Furthermore, both GDM neonates and obese subjects share the same transcriptional alteration in BCL2. Considering the relationship between obesity development and the functions regulated by these two genes, BCL2 and miR-181a could be adopted as potential biomarkers for childhood obesity. However, further study designs are recommended to confirm this hypothesis.
Collapse
Affiliation(s)
- João Paulo de Castro Marcondes
- UNESP - São Paulo State University, Medical School, Botucatu, SP, Brazil; UNESP - São Paulo State University, Bioscience Institute, Botucatu, SP, Brazil.
| | | | | | | | | | | |
Collapse
|
69
|
Vieira PH, Bomfim L, Atella GC, Masuda H, Ramos I. Silencing of RpATG6 impaired the yolk accumulation and the biogenesis of the yolk organelles in the insect vector R. prolixus. PLoS Negl Trop Dis 2018; 12:e0006507. [PMID: 29768406 PMCID: PMC5973624 DOI: 10.1371/journal.pntd.0006507] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 05/29/2018] [Accepted: 05/08/2018] [Indexed: 12/11/2022] Open
Abstract
In oviparous animals, the egg yolk is synthesized by the mother in a major metabolic challenge, where the different yolk components are secreted to the hemolymph and delivered to the oocytes mostly by endocytosis. The yolk macromolecules are then stored in a wide range of endocytic-originated vesicles which are collectively referred to as yolk organelles and occupy most of the mature oocytes cytoplasm. After fertilization, the contents of these organelles are degraded in a regulated manner to supply the embryo cells with fundamental molecules for de novo synthesis. Yolk accumulation and its regulated degradation are therefore crucial for successful development, however, most of the molecular mechanisms involved in the biogenesis, sorting and degradation of targeted yolk organelles are still poorly understood. ATG6 is part of two PI3P-kinase complexes that can regulate the recruitment of the endocytic or the autophagy machineries. Here, we investigate the role of RpATG6 in the endocytosis of the yolk macromolecules and in the biogenesis of the yolk organelles in the insect vector Rhodnius prolixus. We found that vitellogenic females express high levels of RpATG6 in the ovaries, when compared to the levels detected in the midgut and fat body. RNAi silencing of RpATG6 resulted in yolk proteins accumulated in the vitellogenic hemolymph, as a consequence of poor uptake by the oocytes. Accordingly, the silenced oocytes are unviable, white (contrasting to the control pink oocytes), smaller (62% of the control oocyte volume) and accumulate only 40% of the yolk proteins, 80% of the TAG and 50% of the polymer polyphosphate quantified in control oocytes. The cortex of silenced oocytes present atypical smaller vesicles indicating that the yolk organelles were not properly formed and/or sorted, which was supported by the lack of endocytic vesicles near the plasma membrane of silenced oocytes as seen by TEM. Altogether, we found that RpATG6 is central for the mechanisms of yolk accumulation, emerging as an important target for further investigations on oogenesis and, therefore, reproduction of this vector.
Collapse
Affiliation(s)
- Priscila H. Vieira
- Laboratório de Bioquímica de Insetos, Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Larissa Bomfim
- Laboratório de Bioquímica de Insetos, Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Georgia C. Atella
- Laboratório de Bioquímica de lipídeos e lipoproteínas, Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Hatisaburo Masuda
- Laboratório de Bioquímica de Insetos, Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Isabela Ramos
- Laboratório de Bioquímica de Insetos, Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| |
Collapse
|
70
|
Kim JH, Sohn UD, Kim HG, Kim HR. Exposure to 835 MHz RF-EMF decreases the expression of calcium channels, inhibits apoptosis, but induces autophagy in the mouse hippocampus. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2018; 22:277-289. [PMID: 29719450 PMCID: PMC5928341 DOI: 10.4196/kjpp.2018.22.3.277] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 11/22/2017] [Accepted: 01/27/2018] [Indexed: 12/19/2022]
Abstract
The exponential increase in the use of mobile communication has triggered public concerns about the potential adverse effects of radiofrequency electromagnetic fields (RF-EMF) emitted by mobile phones on the central nervous system (CNS). In this study, we explored the relationship between calcium channels and apoptosis or autophagy in the hippocampus of C57BL/6 mice after RF-EMF exposure with a specific absorption rate (SAR) of 4.0 W/kg for 4 weeks. Firstly, the expression level of voltage-gated calcium channels (VGCCs), a key regulator of the entry of calcium ions into the cell, was confirmed by immunoblots. We investigated and confirmed that pan-calcium channel expression in hippocampal neurons were significantly decreased after exposure to RF-EMF. With the observed accumulation of autolysosomes in hippocampal neurons via TEM, the expressions of autophagy-related genes and proteins (e.g., LC3B-II) had significantly increased. However, down-regulation of the apoptotic pathway may contribute to the decrease in calcium channel expression, and thus lower levels of calcium in hippocampal neurons. These results suggested that exposure of RF-EMF could alter intracellular calcium homeostasis by decreasing calcium channel expression in the hippocampus; presumably by activating the autophagy pathway, while inhibiting apoptotic regulation as an adaptation process for 835 MHz RF-EMF exposure.
Collapse
Affiliation(s)
- Ju Hwan Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan 31116, Korea
| | - Uy Dong Sohn
- Department of Pharmacology, College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Hyung-Gun Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan 31116, Korea
| | - Hak Rim Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan 31116, Korea
| |
Collapse
|
71
|
Melatonin Balance the Autophagy and Apoptosis by Regulating UCP2 in the LPS-Induced Cardiomyopathy. Molecules 2018; 23:molecules23030675. [PMID: 29547569 PMCID: PMC6017117 DOI: 10.3390/molecules23030675] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 02/28/2018] [Accepted: 03/01/2018] [Indexed: 12/30/2022] Open
Abstract
To explore the mechanism of mitochondrial uncoupling protein 2 (UCP2) mediating the protective of melatonin when septic cardiomyopathy. UCP2 knocked out mice and cardiomyocytes were used to study the effect of melatonin in response to LPS. Indicators of myocardial and mitochondria injury including mitochondrial membrane potential, mitochondrial permeability transition pore, calcium loading, ROS, and ATP detection were assessed. In addition cell viability and apoptosis as well as autophagy-associated proteins were evaluated. Melatonin was able to protect heart function from LPS, which weakened in the UCP2-knockout mice. Consistently, genipin, a pharmacologic inhibitor of UCP2, augmented LPS-induced damage of AC16 cells. In contrast, melatonin upregulated UCP2 expression and protected the cells from the changes in morphology, mitochondrial membrane potential loss, mitochondrial Ca2+ overload, the opening of mitochondrial permeability transition pore, and subsequent increased ROS generation as well as ATP reduction. Mitophagy proteins (Beclin-1 and LC-3β) were increased while apoptosis-associated proteins (cytochrome C and caspase-3) were decreased when UCP2 was up-regulated. In conclusion, UCP2 may play a protecting role against LPS by regulating the balance between autophagy and apoptosis of cardiomyocytes, and by which mechanisms, it may contribute to homeostasis of cardiac function and cardiomyocytes activity. Melatonin may protect cardiomyocytes through modulating UCP2.
Collapse
|
72
|
Lin Y, Jiao Y, Yuan Y, Zhou Z, Zheng Y, Xiao J, Li C, Chen Z, Cao P. Propionibacterium acnes induces intervertebral disc degeneration by promoting nucleus pulposus cell apoptosis via the TLR2/JNK/mitochondrial-mediated pathway. Emerg Microbes Infect 2018; 7:1. [PMID: 29323102 PMCID: PMC5837142 DOI: 10.1038/s41426-017-0002-0] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 09/22/2017] [Accepted: 10/31/2017] [Indexed: 01/07/2023]
Abstract
Evidence suggests that intervertebral disc degeneration (IVDD) can be induced by Propionibacterium acnes (P. acnes), although the underlying mechanisms are unclear. In this study, we analyzed the pathological changes in degenerated human intervertebral discs (IVDs) infected with P. acnes. Compared with P. acnes-negative samples, P. acnes-positive IVDs showed increased apoptosis of nucleus pulposus cells (NPCs) concomitant with severe IVDD. Then, a P. acnes-inoculated IVD animal model was established, and severe IVDD was induced by P. acnes infection by promoting NPC apoptosis. The results suggested that P.acnes-induced apoptosis of NPCs via the Toll-like receptor 2 (TLR2)/c-Jun N-terminal kinase (JNK) pathway and mitochondrial-mediated cell death. In addition, P. acnes was found to activate autophagy, which likely plays a role in apoptosis of NPCs. Overall, these findings further validated the involvement of P. acnes in the pathology of IVDD and provided evidence that P. acnes-induced apoptosis of NPCs via the TLR2/JNK pathway is likely responsible for the pathology of IVDD.
Collapse
Affiliation(s)
- Yazhou Lin
- 0000 0004 0368 8293grid.16821.3cDepartment of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China ,0000 0004 0368 8293grid.16821.3cShanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| | - Yucheng Jiao
- 0000 0004 0368 8293grid.16821.3cDepartment of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China ,0000 0004 0368 8293grid.16821.3cShanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| | - Ye Yuan
- 0000 0004 0368 8293grid.16821.3cDepartment of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China ,0000 0004 0368 8293grid.16821.3cShanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| | - Zezhu Zhou
- 0000 0004 0368 8293grid.16821.3cDepartment of Orthopedics, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| | - Yuehuan Zheng
- 0000 0004 0368 8293grid.16821.3cDepartment of Orthopedics, Ruijin Hospital North, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| | - Jiaqi Xiao
- 0000 0004 0368 8293grid.16821.3cDepartment of Medical Microbiology and Parasitology, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| | - Changwei Li
- 0000 0004 0368 8293grid.16821.3cShanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| | - Zhe Chen
- 0000 0004 0368 8293grid.16821.3cDepartment of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China ,0000 0004 0368 8293grid.16821.3cShanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| | - Peng Cao
- 0000 0004 0368 8293grid.16821.3cDepartment of Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China ,0000 0004 0368 8293grid.16821.3cShanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases with Integrated Chinese-Western Medicine, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200000 China
| |
Collapse
|
73
|
Hu F, Pan D, Zheng W, Yan T, He X, Ren F, Lu Y, Ma X. Elucidating respective functions of two domains BIR and C-helix of human IAP survivin for precise targeted regulating mitotic cycle, apoptosis and autophagy of cancer cells. Oncotarget 2017; 8:113687-113700. [PMID: 29371939 PMCID: PMC5768356 DOI: 10.18632/oncotarget.22823] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/13/2017] [Indexed: 01/02/2023] Open
Abstract
Survivin was the smallest member of the IAP family, which was over expressed in many different cancers, and considered to be a promising hot target for cancer therapy, and our previous study demonstrated that multiple dominant negative mutants from full-length survivin could have many complex effects on cancer cells, such as cell cycle, apoptosis, and autophagy. But it was not yet known what role the two main domains played in those functions, which would be very important for the design of targeted anticancer drugs and for the interpretation of their molecular mechanisms. In this study, based on preparation the two parts (BIR domain and CC domain) of survivin by genetic engineering and cell characterization assay, we discovered that BIR (T34A)-domain peptide could inhibit Bcap-37 cells growth in a dose- and time-dependent manner, increase the proportion of G2/M phase, and induce caspase-dependent apoptosis via the mitochondrial pathway. While CC (T117A)-domain peptide increased the proportion of S-phase cells and increased the level of the autophagy marker protein LC3B significantly. These further experiments confirmed that TAT-BIR (T34A) peptide could be used to inhibit cell proliferation, promote apoptosis, and block mitosis, and TAT-CC (T117A) peptide showed mainly to promote autophagy, process of DNA replication, and mitosis to breast cancer cells. This research will lay the foundation for interpreting the multifunction mechanism of survivin in cell fates, further make senses in developing the anticancer drugs targeting it precisely and efficiently.
Collapse
Affiliation(s)
- Fabiao Hu
- State Key Laboratory of Bioreactor Engineering, and School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China
| | - Daxia Pan
- State Key Laboratory of Bioreactor Engineering, and School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China
| | - Wenyun Zheng
- Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Ting Yan
- State Key Laboratory of Bioreactor Engineering, and School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China
| | - Xiujuan He
- Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Fuzheng Ren
- Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Yiming Lu
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Xingyuan Ma
- State Key Laboratory of Bioreactor Engineering, and School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China
| |
Collapse
|
74
|
Mejías-Peña Y, Estébanez B, Rodriguez-Miguelez P, Fernandez-Gonzalo R, Almar M, de Paz JA, González-Gallego J, Cuevas MJ. Impact of resistance training on the autophagy-inflammation-apoptosis crosstalk in elderly subjects. Aging (Albany NY) 2017; 9:408-418. [PMID: 28160545 PMCID: PMC5361672 DOI: 10.18632/aging.101167] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/25/2017] [Indexed: 12/13/2022]
Abstract
Aging is associated with a decline in autophagy and a state of low-grade inflammation which further affects apoptosis and autophagy. Importantly, these alterations could reverse with regular physical activity. This study assessed the effects of a resistance exercise training program on autophagy, NLRP3 inflammasome, and apoptosis in peripheral blood mononuclear cells (PBMCs) from old subjects. Twenty-six healthy women and men (age, 69.6±1.5 yr) were randomized to a training (TG) or a control (CG) group. TG performed an 8-week resistance training program, while CG followed their daily routines. Protein expression of beclin-1, Atg12, Atg16 and LAMP-2 increased following the training program, while expression of p62/SQSTM1 and phosphorylation of ULK-1 at Ser757 were significantly lower. Resistance exercise also induced a decrease in NLRP3 expression and in the caspase-1/procaspase-1 ratio. Expression of Bcl-2 and Bcl-xL, as well as the Bad/BcL-2 ratio were reduced, and there was a significant decrease in the protein content of caspase-3. The results obtained seem to indicate that 8-week resistance training stimulates autophagy, prevents NLRP3 inflammasome activation, and reduces apoptosis in PBMCs from elderly subjects. These data could have a significant impact in prevention and rehabilitation programs currently employed in elderly population.
Collapse
Affiliation(s)
| | | | - Paula Rodriguez-Miguelez
- Division of Clinical Translational Science, Georgia Prevention Institute, Department of Pediatrics, Augusta University, Augusta, GA, USA
| | - Rodrigo Fernandez-Gonzalo
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•CEN), Mol, Belgium
| | - Mar Almar
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
| | - José A de Paz
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
| | | | - María J Cuevas
- Institute of Biomedicine (IBIOMED), University of León, León, Spain
| |
Collapse
|
75
|
Kim JH, Yu DH, Kim HJ, Huh YH, Cho SW, Lee JK, Kim HG, Kim HR. Exposure to 835 MHz radiofrequency electromagnetic field induces autophagy in hippocampus but not in brain stem of mice. Toxicol Ind Health 2017; 34:23-35. [DOI: 10.1177/0748233717740066] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The exploding popularity of mobile phones and their close proximity to the brain when in use has raised public concern regarding possible adverse effects from exposure to radiofrequency electromagnetic fields (RF-EMF) on the central nervous system. Numerous studies have suggested that RF-EMF emitted by mobile phones can influence neuronal functions in the brain. Currently, there is still very limited information on what biological mechanisms influence neuronal cells of the brain. In the present study, we explored whether autophagy is triggered in the hippocampus or brain stem after RF-EMF exposure. C57BL/6 mice were exposed to 835 MHz RF-EMF with specific absorption rates (SAR) of 4.0 W/kg for 12 weeks; afterward, the hippocampus and brain stem of mice were dissected and analyzed. Quantitative real-time polymerase chain reaction (qRT-PCR) analysis demonstrated that several autophagic genes, which play key roles in autophagy regulation, were significantly upregulated only in the hippocampus and not in the brain stem. Expression levels of LC3B-II protein and p62, crucial autophagic regulatory proteins, were significantly changed only in the hippocampus. In parallel, transmission electron microscopy (TEM) revealed an increase in the number of autophagosomes and autolysosomes in the hippocampal neurons of RF-EMF-exposed mice. The present study revealed that autophagy was induced in the hippocampus, not in the brain stem, in 835 MHz RF-EMF with an SAR of 4.0 W/kg for 12 weeks. These results could suggest that among the various adaptation processes to the RF-EMF exposure environment, autophagic degradation is one possible mechanism in specific brain regions.
Collapse
Affiliation(s)
- Ju Hwan Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Chungnam, South Korea
| | - Da-Hyeon Yu
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Chungnam, South Korea
| | - Hyo-Jeong Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Chungnam, South Korea
- Center for Electron Microscopy Research, Korea Basic Science Institute, Ochang, Chungbuk, South Korea
| | - Yang Hoon Huh
- Center for Electron Microscopy Research, Korea Basic Science Institute, Ochang, Chungbuk, South Korea
| | - Seong-Wan Cho
- Department of Pharmaceutical Engineering, Konyang University, Nonsan, Chungnam, South Korea
| | - Jin-Koo Lee
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Chungnam, South Korea
| | - Hyung-Gun Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Chungnam, South Korea
| | - Hak Rim Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Chungnam, South Korea
| |
Collapse
|
76
|
Morsi M, Maher A, Aboelmagd O, Johar D, Bernstein L. A shared comparison of diabetes mellitus and neurodegenerative disorders. J Cell Biochem 2017; 119:1249-1256. [PMID: 28681964 DOI: 10.1002/jcb.26261] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 07/05/2017] [Indexed: 12/19/2022]
Abstract
Diabetes mellitus (DM) is one of the most common diseases in the world population, associated with obesity, pancreatic endocrine changes, cardiovascular disease, renal glomerular disease, cerebrovascular disease, peripheral neuropathy, neurodegenerative disease, retinal disease, sleep apnea, some of which are bundled into the metabolic syndrome. The main characteristic of this disease is hyperglycemia, and often with albuminuria. Nevertheless, the classic features, with ketoacidosis in the extreme, are only a first layer of description of this condition. The description of the islet cells of the endocrine pancreas was first described by Opie, and the discovery of insulin by tying off the exocrine pancreatic ducts followed. We later find that the β-cells secrete insulin and glucagon, which synchronously stimulate or suppress glycogenolysis, and that insulin is essential for glucose intake into the cell. There are yet two other layers for our understanding of diabetes and the effects of its dysfunction, which is the basis for understanding the system-wide expression of the disease. We describe the molecular basis for the central nervous system neuropathic diseases that are associated with both Type 1 DM (T1DM) and Type 2 DM (T2DM), but more so with T2DM. T2DM is an autoimmune disease that destroys the insulin secreting islet cells. T2DM is the diabetes that is associated with an imbalance in the glucagon/insulin homeostasis that leads to the formation of amyloid deposits in the brain, pancreatic islet cells, and possibly the kidney glomerulus.
Collapse
Affiliation(s)
- Mahmoud Morsi
- Faculty of Medicine, Menoufia University, Shebin El-kom, Menoufia, Egypt
| | - Ahmed Maher
- Zoonotic Diseases Department, National Research Center, Dokki, Giza, Egypt
| | - Omnia Aboelmagd
- Faculty of Medicine, CairoUniversity, Kasr Al-Ainy, Cairo, Egypt
| | - Dina Johar
- Department of Biochemistry and Nutrition, Ain Shams University Faculty of Women for Arts, Sciences and Education, Heliopolis, Cairo, Egypt.,Department of Physiology and Pathophysiology, Rady College of Medicine, Max Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | | |
Collapse
|
77
|
Raz Y, Guerrero-Ros I, Maier A, Slagboom PE, Atzmon G, Barzilai N, Macian F. Activation-Induced Autophagy Is Preserved in CD4+ T-Cells in Familial Longevity. J Gerontol A Biol Sci Med Sci 2017; 72:1201-1206. [PMID: 28486590 DOI: 10.1093/gerona/glx020] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Indexed: 12/16/2022] Open
Abstract
As with many other tissues and organs, the immune system is also affected by age. Immunosenescence is characterized by a decreased ability of immune cells to mount a productive response upon exposure to new antigens. Several studies have reported that members of families with exceptional longevity show improved immune function, which might contribute to the increased life- and health-span observed in those families. Autophagy is a catabolic process that delivers cytoplasmic material to the lysosomes for degradation. Defective autophagy is known to be associated with age in several cell types and tissues and its dysregulation is related to age-associated diseases. In T-cells, autophagy has an essential role in modulating protein and organelle homeostasis and in the regulation of activation-induced responses. In this study, using two different cohorts of individuals belonging to families with exceptional longevity, we show that CD4+ T-cells isolated from the offspring of parents with exceptional longevity show improved activation-induced autophagic activity compared with age-matched controls. Interestingly, increased autophagy is positively correlated with increased interferon-γ production. In conclusion, autophagy appears to be better maintained in members of families with extended longevity and positively correlates with improved T-cell function.
Collapse
Affiliation(s)
- Yotam Raz
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York.,Department of Molecular Epidemiology, Leiden University Medical Center, The Netherlands
| | | | - Andrea Maier
- Department of Medicine and Aged Care, Royal Melbourne Hospital, University of Melbourne, Australia.,Department of Human Movement Sciences, MOVE Research Institute Amsterdam, Vrije Universiteit Amsterdam, The Netherlands
| | - P Eline Slagboom
- Department of Molecular Epidemiology, Leiden University Medical Center, The Netherlands
| | - Gil Atzmon
- Institute for Aging Research, Albert Einstein College of Medicine, Bronx, New York.,Department of Human Biology, Faculty of Natural Sciences, University of Haifa, Israel
| | - Nir Barzilai
- Institute for Aging Research, Albert Einstein College of Medicine, Bronx, New York.,Department of Genetics, Albert Einstein College of Medicine, Bronx, New York
| | - Fernando Macian
- Department of Pathology, Albert Einstein College of Medicine, Bronx, New York.,Institute for Aging Research, Albert Einstein College of Medicine, Bronx, New York
| |
Collapse
|
78
|
Ngabire D, Kim GD. Autophagy and Inflammatory Response in the Tumor Microenvironment. Int J Mol Sci 2017; 18:ijms18092016. [PMID: 28930154 PMCID: PMC5618664 DOI: 10.3390/ijms18092016] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 09/14/2017] [Accepted: 09/19/2017] [Indexed: 12/19/2022] Open
Abstract
Cell death is the last fate of the life cycle of cells. Different pathways involved in cell death are known to date, and are mostly represented by apoptosis, necrosis, and autophagy. Autophagy is one of the most preserved cell death pathways, characterized by the elimination of large parts of cytoplasmic components after being consumed by a double-membraned vesicle called an autophagosome. The formed autophagosome then fuses with a lysosome containing degrading enzymes and leads to the digestion of the autophagosome content. Autophagy is triggered by stress-related inducers, and is partially dependent on apoptotic proteins. It plays a major role in cancer, particularly in the tumor microenvironment where it has a paradoxical function in acting as a tumor suppressor and also as a tumor promoter. In the tumor microenvironment, autophagy regulates the differentiation of macrophages into tumor-associated macrophages (TAMs) and fibroblasts into cancer-associated fibroblasts (CAFs). TAMs and CAFs are abundantly present in the tumor microenvironment, and participate actively in tumor growth, tumor invasiveness, and tumor resistance to chemotherapy.
Collapse
Affiliation(s)
- Daniel Ngabire
- Department of Microbiology, College of Natural Sciences, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan 608-737, Korea.
| | - Gun-Do Kim
- Department of Microbiology, College of Natural Sciences, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan 608-737, Korea.
| |
Collapse
|
79
|
Nopparat C, Sinjanakhom P, Govitrapong P. Melatonin reverses H 2 O 2 -induced senescence in SH-SY5Y cells by enhancing autophagy via sirtuin 1 deacetylation of the RelA/p65 subunit of NF-κB. J Pineal Res 2017; 63. [PMID: 28295567 DOI: 10.1111/jpi.12407] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 03/08/2017] [Indexed: 12/19/2022]
Abstract
Autophagy, a degradation mechanism that plays a major role in maintaining cellular homeostasis and diminishes in aging, is considered an aging characteristic. Melatonin is an important hormone that plays a wide range of physiological functions, including the anti-aging effect, potentially via the regulation of the Sirtuin1 (SIRT1) pathway. The deacetylation ability of SIRT1 is important for controlling the function of several transcription factors, including nuclear factor kappa B (NF-ĸB). Apart from inflammation, NF-ĸB can regulate autophagy by inhibiting Beclin1, an initiator of autophagy. Although numerous studies have revealed the role of melatonin in regulating autophagy, very limited experiments have shown that melatonin can increase autophagic activity via SIRT1 in a senescent model. This study focuses on the effect of melatonin on autophagy via the deacetylation activity of SIRT1 on RelA/p65, a subunit of NF-ĸB, to determine whether melatonin can attenuate the aging condition. SH-SY5Y cells were treated with H2 O2 to induce the senescent state. These results demonstrated that melatonin reduced a number of beta-galactosidase (SA-βgal)-positive cells, a senescent marker. In addition, melatonin increased the protein levels of SIRT1, Beclin1, and LC3-II, a hallmark protein of autophagy, and reduced the levels of acetylated-Lys310 in the p65 subunit of NF-ĸB in SH-SY5Y cells treated with H2 O2 . Furthermore, in the presence of SIRT1 inhibitor, melatonin failed to increase autophagic markers. The present data indicate that melatonin enhances autophagic activity via the SIRT1 signaling pathway. Taken together, we propose that in modulating autophagy, melatonin may provide a therapeutically beneficial role in the anti-aging processes.
Collapse
Affiliation(s)
- Chutikorn Nopparat
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
| | - Puritat Sinjanakhom
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
| | - Piyarat Govitrapong
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
- Center for Neuroscience and Department of Pharmacology, Faculty of Science, Mahidol University, Bangkok, Thailand
- Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok, Thailand
| |
Collapse
|
80
|
What modulates animal longevity? Fast and slow aging in bivalves as a model for the study of lifespan. Semin Cell Dev Biol 2017; 70:130-140. [PMID: 28778411 DOI: 10.1016/j.semcdb.2017.07.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 07/28/2017] [Accepted: 07/31/2017] [Indexed: 12/12/2022]
Abstract
Delineating the physiological and biochemical causes of aging process in the animal kingdom is a highly active area of research not only because of potential benefits for human health but also because aging process is related to life history strategies (growth and reproduction) and to responses of organisms to environmental conditions and stress. In this synthesis, we advocate studying bivalve species as models for revealing the determinants of species divergences in maximal longevity. This taxonomic group includes the longest living metazoan on earth (Arctica islandica), which insures the widest range of maximum life span when shorter living species are also included in the comparative model. This model can also be useful for uncovering factors modulating the pace of aging in given species by taking advantages of the wide disparity of lifespan among different populations of the same species. For example, maximal lifespan in different populations of A islandica range from approximately 36 years to over 500 years. In the last 15 years, research has revealed that either regulation or tolerance to oxidative stress is tightly correlated to longevity in this group which support further investigations on this taxon to unveil putative mechanistic links between Reactive Oxygen Species and aging process.
Collapse
|
81
|
Rocha-Rodrigues S, Gonçalves IO, Beleza J, Ascensão A, Magalhães J. Effects of endurance training on autophagy and apoptotic signaling in visceral adipose tissue of prolonged high fat diet-fed rats. Eur J Nutr 2017; 57:2237-2247. [PMID: 28699087 DOI: 10.1007/s00394-017-1500-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 06/30/2017] [Indexed: 01/29/2023]
Abstract
PURPOSE Autophagy and apoptosis play critical roles in both development and tissue homeostasis in response to (patho)physiological stimuli, such as high-fat diet (HFD) and endurance training (ET). Therefore, we aimed to investigate how ET modulates autophagy and apoptotic-related signaling in visceral adipose tissue of long-standing HFD-fed rats. METHODS The study was conducted over a 17-week period on Sprague-Dawley rats, which were divided into four groups (n = 8/group): standard diet sedentary (STD+SED), high-fat diet sedentary (HFD+SED), standard diet ET (STD+ET) and high-fat diet ET (HFD+ET). After 9 weeks of dietary regimens, ET groups were trained for 8 weeks on treadmill (5 days/week at 25 m/min for 60 min/day), while maintaining dietary regimens. Autophagy and apoptotic-signaling markers in epididymal white adipose tissue (eWAT) were determined using RT-qPCR, Western blot and spectrometry techniques. RESULTS ET reduced body weight, visceral fat mass and HOMA-IR in standard and HF diet-fed animals. Moreover, ET reverted the HFD-induced increases in the percentage of larger adipocytes and also reduced the percentage of smaller adipocytes. The HFD decreased pre-adipocyte factor 1 (DLK1/PREF1) and increased the pro-apoptotic markers (Bax protein and caspase 3-like activity), while having no impact on autophagy markers. However, ET increased DLK1/PREF1 and Bcl-2 in both diet types, while decreasing Bax and caspases 9, 8 and 3-like activities in HFD feeding rats. Additionally, Beclin-1 and p62 protein significantly increased in ET groups of both diet types. CONCLUSIONS Data demonstrate that 8 weeks of ET was effective in attenuating apoptotic-related signaling in long-standing HFD-fed rats. Moreover, HFD and ET had no impact on VAT autophagy markers.
Collapse
Affiliation(s)
- Sílvia Rocha-Rodrigues
- Faculty of Sport, CIAFEL - Research Centre in Physical Activity, Health and Leisure, University of Porto, Porto, Portugal. .,Faculty of Sport Sciences, LaMetEx - Laboratory of Metabolism and Exercise, University of Porto, Porto, Portugal.
| | - Inês O Gonçalves
- Faculty of Sport, CIAFEL - Research Centre in Physical Activity, Health and Leisure, University of Porto, Porto, Portugal.,Faculty of Sport Sciences, LaMetEx - Laboratory of Metabolism and Exercise, University of Porto, Porto, Portugal
| | - Jorge Beleza
- Faculty of Sport, CIAFEL - Research Centre in Physical Activity, Health and Leisure, University of Porto, Porto, Portugal.,Faculty of Sport Sciences, LaMetEx - Laboratory of Metabolism and Exercise, University of Porto, Porto, Portugal
| | - António Ascensão
- Faculty of Sport, CIAFEL - Research Centre in Physical Activity, Health and Leisure, University of Porto, Porto, Portugal.,Faculty of Sport Sciences, LaMetEx - Laboratory of Metabolism and Exercise, University of Porto, Porto, Portugal
| | - José Magalhães
- Faculty of Sport, CIAFEL - Research Centre in Physical Activity, Health and Leisure, University of Porto, Porto, Portugal.,Faculty of Sport Sciences, LaMetEx - Laboratory of Metabolism and Exercise, University of Porto, Porto, Portugal
| |
Collapse
|
82
|
Liu H, Lei H, Shi Y, Wang JJ, Chen N, Li ZH, Chen YF, Ye QF, Yang Y. Autophagy inhibitor 3-methyladenine alleviates overload-exercise-induced cardiac injury in rats. Acta Pharmacol Sin 2017; 38:990-997. [PMID: 28260802 DOI: 10.1038/aps.2016.169] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 12/09/2016] [Indexed: 12/14/2022] Open
Abstract
Overload-exercise (OE) causes myocardial injury through inducing autophagy and apoptosis. In this study we examined whether an autophagy inhibitor 3-methyladenine (3-MA) could alleviate OE-induced cardiac injury. Rats were injected with 3-MA (15 mg/kg, iv) or saline before subjected to various intensities of OE, including no swim (control), 2 h swim (mild-intensity exercise, MIE), 2 h swim with 2.5% body weight overload (moderate OE; MOE), 5% overload (intensive OE; IOE) or 2.5% overload until exhausted (exhaustive OE; EOE). After OE, the hearts were harvested for morphological and biochemiacal analysis. The cardiac morphology, autophagosomes and apoptosis were examined with H&E staining, transmission electron microscopy and TUNEL analysis, respectively. Autophagy-related proteins to (LC3-II/I and Beclin-1) and apoptosis-related proteins (Bcl-2/Bax) were assessed using Western blotting. Our results showed that compared with the control, MIE did not change the morphological structures of the heart tissues that exhibited intact myocardial fibers and neatly arranged cardiomyocytes. However, IOE resulted in irregular arrangement of cardiomyocytes and significantly increased width of cardiomyocytes, whereas EOE caused more swollen and even disrupted cardiomyocytes. In parallel with the increased OE intensity (MOE, IOE, EOE), cardiomyocyte autophagy and apoptosis became more and more prominent, evidenced by the increasing number of autophagosomes and expression levels of LC3-II/I and Beclin-1 as well as the increasing apoptotic cells and decreasing Bcl-2/Bax ratio. 3-MA administration significantly attenuated OE-induced morphological changes of cardiomyocytes as well as all the autophagy- and apoptosis-related abnormalities in MOE, IOE and EOE rats. Thus, the autophagy inhibitor 3-MA could alleviate OE-induced heart injury in rats.
Collapse
|
83
|
Nah J, Yoo SM, Jung S, Jeong EI, Park M, Kaang BK, Jung YK. Phosphorylated CAV1 activates autophagy through an interaction with BECN1 under oxidative stress. Cell Death Dis 2017; 8:e2822. [PMID: 28542134 PMCID: PMC5520747 DOI: 10.1038/cddis.2017.71] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 01/26/2017] [Accepted: 01/30/2017] [Indexed: 12/19/2022]
Abstract
CAV1/Caveolin1, an integral membrane protein, is involved in caveolae function and cellular signaling pathways. Here, we report that CAV1 is a positive regulator of autophagy under oxidative stress and cerebral ischemic injury. Treatment with hydrogen peroxide enhanced autophagy flux and caused the localization of BECN1 to the mitochondria, whereas these changes were impaired in the absence of CAV1. Among many autophagy signals, only LC3 foci formation in response to hydrogen peroxide was abolished by CAV1 deficiency. Under oxidative stress, CAV1 interacted with a complex of BECN1/VPS34 through its scaffolding domain, and this interaction facilitated autophagosome formation. Interestingly, the phosphorylation of CAV1 at tyrosine-14 was essential for the interaction with BECN1 and their localization to the mitochondria, and the activation of autophagy in response to hydrogen peroxide. In addition, the expression of a phosphatase PTPN1 reduced the phosphorylation of CAV1 and inhibited autophagy. Further, compared to that in wild-type mice, autophagy was impaired and cerebral infarct damage was aggravated in the brain of Cav1 knockout mice. These results suggest that the phosphorylated CAV1 functions to activate autophagy through binding to the BECN1/VPS34 complex under oxidative stress and to protect against ischemic damage.
Collapse
Affiliation(s)
- Jihoon Nah
- Department of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul, Gwanak-gu 151-747, Korea
| | - Seung-Min Yoo
- Department of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul, Gwanak-gu 151-747, Korea
| | - Sunmin Jung
- Department of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul, Gwanak-gu 151-747, Korea
| | - Eun Il Jeong
- Department of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul, Gwanak-gu 151-747, Korea
| | - Moonju Park
- Department of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul, Gwanak-gu 151-747, Korea
| | - Bong-Kiun Kaang
- Department of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul, Gwanak-gu 151-747, Korea
| | - Yong-Keun Jung
- Department of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul, Gwanak-gu 151-747, Korea
| |
Collapse
|
84
|
Chen X, Zhang L, Li J, Gao F, Zhou G. Hydrogen Peroxide-Induced Change in Meat Quality of the Breast Muscle of Broilers Is Mediated by ROS Generation, Apoptosis, and Autophagy in the NF-κB Signal Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:3986-3994. [PMID: 28447793 DOI: 10.1021/acs.jafc.7b01267] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We investigated the relationship between meat quality and oxidative damage caused by hydrogen peroxide (H2O2) in the breast muscle of broilers. Moreover, we explored the occurrence of apoptosis and autophagy, as well as the expression of NF-κB in these signaling pathways to provide evidence of possible oxidative damage mechanisms. The broilers received a basal diet and were randomly divided into five treatments (noninjected control, 0.75% saline-injected, and 2.5%, 5.0%, or 10.0% H2O2-injected treatments; 1.0 mL/kg in body weight). The results showed that oxidative stress induced by H2O2 had a negative effect on relative muscle weight, histomorphology, and redox status, while the underlying oxidative damage caused a decline in meat quality (decrease of pH24h, 10% H2O2 treatment; increase of shear force, 5% and 10% H2O2 treatments) of broilers. This could be attributed to the apoptosis and autophagy processes triggered by excessive reactive oxygen species that suppress the NF-κB signaling pathway.
Collapse
Affiliation(s)
- Xiangxing Chen
- College of Animal Science and Technology, Jiangsu Key Laboratory of Animal Origin Food Production and Safety Guarantee, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing Agricultural University , No. 1 Weigan, Nanjing 210095, P.R. China
| | - Lin Zhang
- College of Animal Science and Technology, Jiangsu Key Laboratory of Animal Origin Food Production and Safety Guarantee, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing Agricultural University , No. 1 Weigan, Nanjing 210095, P.R. China
| | - Jiaolong Li
- College of Animal Science and Technology, Jiangsu Key Laboratory of Animal Origin Food Production and Safety Guarantee, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing Agricultural University , No. 1 Weigan, Nanjing 210095, P.R. China
| | - Feng Gao
- College of Animal Science and Technology, Jiangsu Key Laboratory of Animal Origin Food Production and Safety Guarantee, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing Agricultural University , No. 1 Weigan, Nanjing 210095, P.R. China
| | - Guanghong Zhou
- College of Animal Science and Technology, Jiangsu Key Laboratory of Animal Origin Food Production and Safety Guarantee, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing Agricultural University , No. 1 Weigan, Nanjing 210095, P.R. China
| |
Collapse
|
85
|
Li Q, Li N, Cui HH, Tian XQ, Jin C, Chen GH, Yang YJ. Tongxinluo exerts protective effects via anti-apoptotic and pro-autophagic mechanisms by activating AMPK pathway in infarcted rat hearts. Exp Physiol 2017; 102:422-435. [PMID: 28150462 DOI: 10.1113/ep086192] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 01/30/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Qing Li
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100037 People's Republic of China
| | - Na Li
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100037 People's Republic of China
| | - He-He Cui
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100037 People's Republic of China
| | - Xia-Qiu Tian
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100037 People's Republic of China
| | - Chen Jin
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100037 People's Republic of China
| | - Gui-Hao Chen
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100037 People's Republic of China
| | - Yue-Jin Yang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100037 People's Republic of China
| |
Collapse
|
86
|
Kim JH, Yu DH, Kim HR. Activation of autophagy at cerebral cortex and apoptosis at brainstem are differential responses to 835 MHz RF-EMF exposure. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2017; 21:179-188. [PMID: 28280411 PMCID: PMC5343051 DOI: 10.4196/kjpp.2017.21.2.179] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 12/09/2016] [Accepted: 12/18/2016] [Indexed: 12/19/2022]
Abstract
With the explosive increase in exposure to radiofrequency electromagnetic fields (RF-EMF) emitted by mobile phones, public concerns have grown over the last few decades with regard to the potential effects of EMF exposure on the nervous system in the brain. Many researchers have suggested that RF-EMFs can effect diverse neuronal alterations in the brain, thereby affecting neuronal functions as well as behavior. Previously, we showed that long-term exposure to 835 MHz RF-EMF induces autophagy in the mice brain. In this study, we explore whether short-term exposure to RF-EMF leads to the autophagy pathway in the cerebral cortex and brainstem at 835 MHz with a specific absorption rate (SAR) of 4.0 W/kg for 4 weeks. Increased levels of autophagy genes and proteins such as LC3B-II and Beclin1 were demonstrated and the accumulation of autophagosomes and autolysosomes was observed in cortical neurons whereas apoptosis pathways were up-regulated in the brainstem but not in the cortex following 4 weeks of RF exposure. Taken together, the present study indicates that monthly exposure to RF-EMF induces autophagy in the cerebral cortex and suggests that autophagic degradation in cortical neurons against a stress of 835 MHz RF during 4 weeks could correspond to adaptation to the RF stress environment. However, activation of apoptosis rather than autophagy in the brainstem is suggesting the differential responses to the RF-EMF stresses in the brain system.
Collapse
Affiliation(s)
- Ju Hwan Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan 31116, Korea
| | - Da-Hyeon Yu
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan 31116, Korea
| | - Hak Rim Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan 31116, Korea
| |
Collapse
|
87
|
Yu JJ, Zhu LX, Zhang J, Liu S, Lv FY, Cheng X, Liu GJ, Peng B. From the Cover: Activation of NF-κB-Autophagy Axis by 2-Hydroxyethyl Methacrylate Commits Dental Mesenchymal Cells to Apoptosis. Toxicol Sci 2017; 157:100-111. [DOI: 10.1093/toxsci/kfx023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
|
88
|
BonakdarYazdi B, Khodagholi F, Shaerzadeh F, Sharifzadeh A, Ahmadi R, Sanati M, Mehdizadeh H, Payandehmehr B, Vali L, Jahromi MM, Taghizadeh G, Sharifzadeh M. The effect of arsenite on spatial learning: Involvement of autophagy and apoptosis. Eur J Pharmacol 2017; 796:54-61. [DOI: 10.1016/j.ejphar.2016.12.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 12/03/2016] [Accepted: 12/15/2016] [Indexed: 12/11/2022]
|
89
|
Kim JH, Yu DH, Huh YH, Lee EH, Kim HG, Kim HR. Long-term exposure to 835 MHz RF-EMF induces hyperactivity, autophagy and demyelination in the cortical neurons of mice. Sci Rep 2017; 7:41129. [PMID: 28106136 PMCID: PMC5247706 DOI: 10.1038/srep41129] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 12/15/2016] [Indexed: 12/19/2022] Open
Abstract
Radiofrequency electromagnetic field (RF-EMF) is used globally in conjunction with mobile communications. There are public concerns of the perceived deleterious biological consequences of RF-EMF exposure. This study assessed neuronal effects of RF-EMF on the cerebral cortex of the mouse brain as a proxy for cranial exposure during mobile phone use. C57BL/6 mice were exposed to 835 MHz RF-EMF at a specific absorption rate (SAR) of 4.0 W/kg for 5 hours/day during 12 weeks. The aim was to examine activation of autophagy pathway in the cerebral cortex, a brain region that is located relatively externally. Induction of autophagy genes and production of proteins including LC3B-II and Beclin1 were increased and accumulation of autolysosome was observed in neuronal cell bodies. However, proapoptotic factor Bax was down-regulted in the cerebral cortex. Importantly, we found that RF-EMF exposure led to myelin sheath damage and mice displayed hyperactivity-like behaviour. The data suggest that autophagy may act as a protective pathway for the neuronal cell bodies in the cerebral cortex during radiofrequency exposure. The observations that neuronal cell bodies remained structurally stable but demyelination was induced in cortical neurons following prolonged RF-EMF suggests a potential cause of neurological or neurobehavioural disorders.
Collapse
Affiliation(s)
- Ju Hwan Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan-si, Chungnam, Republic of Korea
| | - Da-Hyeon Yu
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan-si, Chungnam, Republic of Korea
| | - Yang Hoon Huh
- Center for Electron Microscopy Research, Korea Basic Science Institute, Ochang, Chung-Buk, Republic of Korea
| | - Eun Ho Lee
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan-si, Chungnam, Republic of Korea
| | - Hyung-Gun Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan-si, Chungnam, Republic of Korea
| | - Hak Rim Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan-si, Chungnam, Republic of Korea
| |
Collapse
|
90
|
Höhn A, Weber D, Jung T, Ott C, Hugo M, Kochlik B, Kehm R, König J, Grune T, Castro JP. Happily (n)ever after: Aging in the context of oxidative stress, proteostasis loss and cellular senescence. Redox Biol 2016; 11:482-501. [PMID: 28086196 PMCID: PMC5228102 DOI: 10.1016/j.redox.2016.12.001] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 11/30/2016] [Accepted: 12/01/2016] [Indexed: 12/14/2022] Open
Abstract
Aging is a complex phenomenon and its impact is becoming more relevant due to the rising life expectancy and because aging itself is the basis for the development of age-related diseases such as cancer, neurodegenerative diseases and type 2 diabetes. Recent years of scientific research have brought up different theories that attempt to explain the aging process. So far, there is no single theory that fully explains all facets of aging. The damage accumulation theory is one of the most accepted theories due to the large body of evidence found over the years. Damage accumulation is thought to be driven, among others, by oxidative stress. This condition results in an excess attack of oxidants on biomolecules, which lead to damage accumulation over time and contribute to the functional involution of cells, tissues and organisms. If oxidative stress persists, cellular senescence is a likely outcome and an important hallmark of aging. Therefore, it becomes crucial to understand how senescent cells function and how they contribute to the aging process. This review will cover cellular senescence features related to the protein pool such as morphological and molecular hallmarks, how oxidative stress promotes protein modifications, how senescent cells cope with them by proteostasis mechanisms, including antioxidant enzymes and proteolytic systems. We will also highlight the nutritional status of senescent cells and aged organisms (including human clinical studies) by exploring trace elements and micronutrients and on their importance to develop strategies that might increase both, life and health span and postpone aging onset.
Collapse
Affiliation(s)
- Annika Höhn
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany
| | - Daniela Weber
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; NutriAct - Competence Cluster Nutrition Research Berlin-Potsdam, 14558 Nuthetal, Germany
| | - Tobias Jung
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany
| | - Christiane Ott
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany
| | - Martin Hugo
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany
| | - Bastian Kochlik
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; NutriAct - Competence Cluster Nutrition Research Berlin-Potsdam, 14558 Nuthetal, Germany
| | - Richard Kehm
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany
| | - Jeannette König
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany; NutriAct - Competence Cluster Nutrition Research Berlin-Potsdam, 14558 Nuthetal, Germany
| | - José Pedro Castro
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany; Faculty of Medicine, Department of Biomedicine, University of Porto, 4200-319, Portugal; Institute for Innovation and Health Research (I3S), Aging and Stress Group, R. Alfredo Allen, 4200-135 Porto, Portugal.
| |
Collapse
|
91
|
Azimi L, Kachooeian M, Khodagholi F, Yans A, Heysieattalab S, Vakilzadeh G, Vosoughi N, Sanati M, Taghizadeh G, Sharifzadeh M. Protective effects of salicylate on PKA inhibitor (H-89)-induced spatial memory deficit via lessening autophagy and apoptosis in rats. Pharmacol Biochem Behav 2016; 150-151:158-169. [DOI: 10.1016/j.pbb.2016.10.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 10/23/2016] [Accepted: 10/25/2016] [Indexed: 01/29/2023]
|
92
|
Nie C, Zhou J, Qin X, Shi X, Zeng Q, Liu J, Yan S, Zhang L. Diosgenin-induced autophagy and apoptosis in a human prostate cancer cell line. Mol Med Rep 2016; 14:4349-4359. [DOI: 10.3892/mmr.2016.5750] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 08/02/2016] [Indexed: 11/06/2022] Open
|
93
|
Autophagy and mitochondrial dysfunction in adjuvant-arthritis rats treatment with resveratrol. Sci Rep 2016; 6:32928. [PMID: 27611176 PMCID: PMC5017199 DOI: 10.1038/srep32928] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 08/17/2016] [Indexed: 01/18/2023] Open
Abstract
Resveratrol is a polyphenol derivatives which exhibits a pro-apoptotic effect in a variety of human cancers by triggering mitochondria apoptosis pathway and autophagy. However, there are scarcely reports on its apoptosis-promoting effect in abnormal proliferation fibroblast-like synoviocytes (FLSs). In this study, we investigated the underlying mechanism and apoptosis-inducing effects of resveratrol on the abnormal proliferation of FLSs in adjuvant-arthritis (AA) rats. Since using resveratrol for 12 days resulted in a significant decreasing the swelling degree of the paw, reducing malondialdehyde (MDA) content and enhancing superoxide dismutase (SOD) activity, antioxidant capacity, glutathione peroxidase and glutathione reductase ratio in AA rats. Moreover, we found that 5 μMH2O2 could increase cells viability, Beclin1, LC3A/B, MnSOD, SIRT3 protein expression in FLSs. But, resveratrol could reverse these effects by changing mitochondrial membrane potential (Δψm) to promote mitochondrial reactive oxygen species (mtROS) generation in 5 μMH2O2-treatment FLSs. These results suggest that oxidative stress existed in AA rats. Resveratrol could suppress oxidative stress in AA rats and increase mtROS production by reducing autophagy protein Beclin1, LC3A/B and oxidative stress protein MnSOD to promoted the apoptosis of FLSs. Thus, targeting of mtROS may be a crucial mechanism of resveratrol confers patients with rheumatoid arthritis.
Collapse
|
94
|
Ariosa AR, Klionsky DJ. Autophagy core machinery: overcoming spatial barriers in neurons. J Mol Med (Berl) 2016; 94:1217-1227. [PMID: 27544281 DOI: 10.1007/s00109-016-1461-9] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 08/09/2016] [Accepted: 08/12/2016] [Indexed: 12/09/2022]
Abstract
Autophagy is a major degradation pathway that engulfs, removes, and recycles unwanted cytoplasmic material including damaged organelles and toxic protein aggregates. One type of autophagy, macroautophagy, is a tightly regulated process facilitated by autophagy-related (Atg) proteins that must communicate effectively and act in concert to enable the de novo formation of the phagophore, its maturation into an autophagosome, and its subsequent targeting and fusion with the lysosome or the vacuole. Autophagy plays a significant role in physiology, and its dysregulation has been linked to several diseases, which include certain cancers, cardiomyopathies, and neurodegenerative diseases. Here, we summarize the key processes and the proteins that make up the macroautophagy machinery. We also briefly highlight recently uncovered molecular mechanisms specific to neurons allowing them to uniquely regulate this catabolic process to accommodate their complicated architecture and non-dividing state. Overall, these distinct mechanisms establish a conceptual framework addressing how macroautophagic dysfunction could result in maladies of the nervous system, providing possible therapeutic avenues to explore with a goal of preventing or curing such diseases.
Collapse
Affiliation(s)
- Aileen R Ariosa
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Daniel J Klionsky
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA.
| |
Collapse
|
95
|
Icariin Attenuates OGD/R-Induced Autophagy via Bcl-2-Dependent Cross Talk between Apoptosis and Autophagy in PC12 Cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:4343084. [PMID: 27610184 PMCID: PMC5004044 DOI: 10.1155/2016/4343084] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/11/2016] [Accepted: 07/25/2016] [Indexed: 11/18/2022]
Abstract
Icariin (ICA), an active component of Epimedium brevicornum Maxim, exerts a variety of neuroprotective effects such as antiapoptosis. However, the mechanisms underlying antiapoptosis of ICA in neurons exposed to oxygen-glucose deprivation and reperfusion (OGD/R) are unclear. The B-cell lymphoma-2 (Bcl-2) protein family plays an important role in the regulation of apoptosis and autophagy through Bcl-2-dependent cross talk. Bcl-2 suppresses apoptosis by binding to Bax and inhibits autophagy by binding to Beclin-1 which is an autophagy related protein. In the present study, MTT result showed that ICA increased cell viability significantly in OGD/R treated PC12 cells (P < 0.01). Results of western blotting analysis showed that ICA increased Bcl-2 expression significantly and decreased expressions of Bax, cleaved Caspase-3, Beclin-1, and LC3-II significantly in OGD/R treated PC12 cells (P < 0.01). These results suggest that ICA protects PC12 cells from OGD/R induced autophagy via Bcl-2-dependent cross talk between apoptosis and autophagy.
Collapse
|
96
|
Lower Beclin 1 downregulates HER2 expression to enhance tamoxifen sensitivity and predicts a favorable outcome for ER positive breast cancer. Oncotarget 2016; 8:52156-52177. [PMID: 28881721 PMCID: PMC5581020 DOI: 10.18632/oncotarget.11044] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 06/29/2016] [Indexed: 01/13/2023] Open
Abstract
Tamoxifen(TAM) is one of the most effective endocrine treatment for estrogen receptor(ER)-positive breast cancer, however drug resistance greatly limits benefit of it. Our purpose is to uncover the role of Beclin 1 in tamoxifen resistance and prognosis of ER positive breast cancer. We established a tamoxifen resistant ER-positive breast cancer cell subline MCF-7R presenting with higher Beclin 1 and human epidermal growth factor receptor 2(HER2) levels than MCF-7. Silencing Beclin 1 decreased levels of HER2 and significantly promoted TAM sensitivity of MCF-7 and MCF-7R in vitro. Overexpression of HER2 could reverse TAM sensitivity, which was formerly increased in Beclin 1 downregulated cell. Beclin 1 level was not only positively correlated with level of HER2 but also negatively correlated with overall survival of ER-positive breast cancer patients. Using bioinformatic methods, Beclin 1 mRNA was found to be negatively correlated with overall survival in breast cancer patients receiving TAM treatment. This study indicated for the first time that lower HER2 expression by Beclin 1 downregulation contributes to alteration of tamoxifen sensitivity and low Beclin 1 predicts favorable outcome in ER-positive breast cancer.
Collapse
|
97
|
Vartak-Sharma N, Nooka S, Ghorpade A. Astrocyte elevated gene-1 (AEG-1) and the A(E)Ging HIV/AIDS-HAND. Prog Neurobiol 2016; 157:133-157. [PMID: 27090750 DOI: 10.1016/j.pneurobio.2016.03.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 03/11/2016] [Accepted: 03/19/2016] [Indexed: 12/23/2022]
Abstract
Recent attempts to analyze human immunodeficiency virus (HIV)-1-induced gene expression changes in astrocytes uncovered a multifunctional oncogene, astrocyte elevated gene-1 (AEG-1). Our previous studies revealed that AEG-1 regulates reactive astrocytes proliferation, migration and inflammation, hallmarks of aging and CNS injury. Moreover, the involvement of AEG-1 in neurodegenerative disorders, such as Huntington's disease and migraine, and its induction in the aged brain suggest a plausible role in regulating overall CNS homeostasis and aging. Therefore, it is important to investigate AEG-1 specifically in aging-associated cognitive decline. In this study, we decipher the common mechanistic links in cancer, aging and HIV-1-associated neurocognitive disorders that likely contribute to AEG-1-based regulation of astrocyte responses and function. Despite AEG-1 incorporation into HIV-1 virions and its induction by HIV-1, tumor necrosis factor-α and interleukin-1β, the specific role(s) of AEG-1 in astrocyte-driven HIV-1 neuropathogenesis are incompletely defined. We propose that AEG-1 plays a central role in a multitude of cellular stress responses involving mitochondria, endoplasmic reticulum and the nucleolus. It is thus important to further investigate AEG-1-based cellular and molecular regulation in order to successfully develop better therapeutic approaches that target AEG-1 to combat cancer, HIV-1 and aging.
Collapse
Affiliation(s)
- Neha Vartak-Sharma
- Department of Cell Biology and Immunology, University of North Texas Health Science Center, Fort Worth, TX, 76107-2699, USA; Institute for Integrated Cell-Material Sciences, Kyoto University, Japan; Institute for Stem Cell Research and Regenerative Medicine, National Center for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India
| | - Shruthi Nooka
- Department of Cell Biology and Immunology, University of North Texas Health Science Center, Fort Worth, TX, 76107-2699, USA
| | - Anuja Ghorpade
- Department of Cell Biology and Immunology, University of North Texas Health Science Center, Fort Worth, TX, 76107-2699, USA.
| |
Collapse
|
98
|
Kim JH, Huh YH, Kim HR. Induction of Autophagy in the Striatum and Hypothalamus of Mice after 835 MHz Radiofrequency Exposure. PLoS One 2016; 11:e0153308. [PMID: 27073885 PMCID: PMC4830612 DOI: 10.1371/journal.pone.0153308] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 03/28/2016] [Indexed: 12/19/2022] Open
Abstract
The extensive use of wireless mobile phones and associated communication devices has led to increasing public concern about potential biological health-related effects of the exposure to electromagnetic fields (EMFs). EMFs emitted by a mobile phone have been suggested to influence neuronal functions in the brain and affect behavior. However, the affects and phenotype of EMFs exposure are unclear. We applied radiofrequency (RF) of 835 MHz at a specific absorption rate (SAR) of 4.0 W/kg for 5 hours/day for 4 and 12 weeks to clarify the biological effects on mouse brain. Interestingly, microarray data indicated that a variety of autophagic related genes showed fold-change within small range after 835 MHz RF exposure. qRT-PCR revealed significant up-regulation of the autophagic genes Atg5, LC3A and LC3B in the striatum and hypothalamus after a 12-week RF. In parallel, protein expression of LC3B-II was also increased in both brain regions. Autophagosomes were observed in the striatum and hypothalamus of RF-exposed mice, based on neuronal transmission electron microscopy. Taken together, the results indicate that RF exposure of the brain can induce autophagy in neuronal tissues, providing insight into the protective mechanism or adaptation to RF stress.
Collapse
Affiliation(s)
- Ju Hwan Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Chungnam, Republic of Korea
| | - Yang Hoon Huh
- Nano-Bio EM Research Group, Korea Basic Science Institute, Gwahak-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - Hak Rim Kim
- Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Chungnam, Republic of Korea
- * E-mail:
| |
Collapse
|
99
|
Li M, Gao P, Zhang J. Crosstalk between Autophagy and Apoptosis: Potential and Emerging Therapeutic Targets for Cardiac Diseases. Int J Mol Sci 2016; 17:332. [PMID: 26950124 PMCID: PMC4813194 DOI: 10.3390/ijms17030332] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 02/06/2016] [Accepted: 02/19/2016] [Indexed: 12/19/2022] Open
Abstract
Autophagy is a cell survival process which is related to breaking down and reusing cytoplasm components. Moreover, autophagy regulates cell death under certain conditions. Apoptosis has the characteristics of chromatin agglutination and the shrinking of nuclear and apoptosis body form. Even if the mechanisms of autophagy and apoptosis have differences, some proteins modulate both autophagy and apoptosis. Crosstalk between them exists. This review highlights recent advances in the interaction of autophagy and apoptosis and its importance in the development of cardiovascular diseases.
Collapse
Affiliation(s)
- Meng Li
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.
| | - Ping Gao
- Department of Medical Imaging, Urumqi General Hospital of Lanzhou Military Area Command, Urumqi 830000, China.
| | - Junping Zhang
- Department of cardiology, First Teaching Hospital of Tianjin University of Traditional Chinese Medcine, Tianjin 300192, China.
| |
Collapse
|
100
|
Liu XH, Wang ZJ, Chen DM, Chen MF, Jin XX, Huang J, Zhang YG. Molecular characterization of Beclin 1 in rare minnow (Gobiocypris rarus) and its expression after waterborne cadmium exposure. FISH PHYSIOLOGY AND BIOCHEMISTRY 2016; 42:111-123. [PMID: 26347097 DOI: 10.1007/s10695-015-0122-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Accepted: 08/24/2015] [Indexed: 06/05/2023]
Abstract
Beclin 1 plays an important role in autophagy and apoptosis which are well documented in mammals. However, relevant reports are rare in fish. This study characterized Beclin 1 of the rare minnow Gobiocypris rarus (rmBeclin 1), which encodes a peptide of 447 amino acids using RT-PCR and RACE. The deduced peptide showed 96.4 and 80.8% similarity to Beclin 1 of common carp and human, respectively. Semiquantitative RT-PCR revealed that rmBeclin 1 was ubiquitously expressed in all tested tissues of male and female fish in all developmental stages, even unfertilized eggs. RT-qPCR revealed that rmBeclin 1 mRNA transcripts were significantly up-regulated in gills after a 12 h treatment with waterborne CdCl2 but were decreased thereafter. However, rmBeclin 1 expression was decreased in the brain, but it was not significantly changed in other tissues. Subchronic CdCl2 exposure significantly increased rmBeclin 1 in the brain, but it distinctly decreased rmBeclin 1 in the gill and hepatopancreas. A dose-dependent effect was not observed in mature fish treated for 96 h, but a dose-dependent effect existed in immature fish treated for 10 days. Longer treatment (10 day) caused a significantly higher expression of rmBeclin 1 in the larvae groups. These data suggest that alterations in rmBeclin 1 after CdCl2 exposure are tissue-specific and time-related and that the dose-dependent effect was restricted to a certain concentration range and exposure time.
Collapse
Affiliation(s)
- Xiao-Hong Liu
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, Southwest University School of Life Science, Chongqing, 400715, China
| | - Zhi-Jian Wang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, Southwest University School of Life Science, Chongqing, 400715, China
| | - Dong-Ming Chen
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, Southwest University School of Life Science, Chongqing, 400715, China
| | - Mu-Fei Chen
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, Southwest University School of Life Science, Chongqing, 400715, China
| | - Xing-Xing Jin
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, Southwest University School of Life Science, Chongqing, 400715, China
| | - Jing Huang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, Southwest University School of Life Science, Chongqing, 400715, China
| | - Yao-Guang Zhang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Key Laboratory of Aquatic Science of Chongqing, Southwest University School of Life Science, Chongqing, 400715, China.
| |
Collapse
|