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Jiang Y, Liu H, Ji B, Wang Z, Wang C, Yang C, Pan Y, Chen J, Cheng B, Bai B. Apelin‑13 attenuates ER stress‑associated apoptosis induced by MPP+ in SH‑SY5Y cells. Int J Mol Med 2018; 42:1732-1740. [PMID: 29901077 DOI: 10.3892/ijmm.2018.3719] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 05/31/2018] [Indexed: 11/06/2022] Open
Abstract
Apelin‑13, a neuropeptide that acts as a ligand for a putative receptor related to the angiotensin II type receptor, elicits neuroprotective effects in numerous neurological conditions, such as Huntington's disease and cerebral ischemia. Parkinson's disease (PD), one of the most prevalent neurodegenerative diseases, is caused by damage to neurons in the brain; however, the underlying mechanism remains unclear. The present study explored the effects of apelin‑13 on SH‑SY5Y human neuroblastoma cells treated with 1‑methyl‑4‑phenylpyridine (MPP+). Cell growth, cell viability, and apoptosis were measured by real‑time cell analysis, the Cell Counting Kit‑8 assay, and flow cytometry, respectively. In addition, the expression levels of extracellular signal‑regulated kinase (ERK) 1/2, p38 mitogen‑activated protein kinase (MAPK), glucose‑regulated protein 78 (GRP78), C/EBP homologous protein (CHOP), and cleaved caspase‑12 were assessed by western blotting. MPP+ treatment decreased the viability of SH‑SY5Y cells and increased their apoptosis; however, these changes were attenuated by pretreatment with apelin‑13. Treatment with MPP+ for 24 h significantly increased the expression levels of phospho‑ERK1/2, phospho‑p38, GRP78, CHOP, and cleaved caspase‑12 in SH‑SY5Y cells. Pretreatment with apelin‑13 significantly attenuated the upregulation of GRP78, CHOP and cleaved caspase‑12 in MPP+‑treated SH‑SY5Y cells, and significantly enhanced the expression levels of phospho‑ERK1/2. Taken together, the present results support a model in which apelin‑13 inhibits MPP+‑induced apoptosis of SH‑SY5Y cells by decreasing the expression of GRP78, CHOP, and cleaved caspase‑12, and by increasing the expression of phospho‑ERK1/2. The present findings suggest that apelin‑13 may be useful for the treatment of PD.
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Affiliation(s)
- Yunlu Jiang
- Neurobiology Institute, Jining Medical University, Jining, Shandong 272067, P.R. China
| | - Haiqing Liu
- Department of Physiology, Taishan Medical College, Taian, Shandong 271000, P.R. China
| | - Bingyuan Ji
- Neurobiology Institute, Jining Medical University, Jining, Shandong 272067, P.R. China
| | - Zhengwen Wang
- Neurobiology Institute, Jining Medical University, Jining, Shandong 272067, P.R. China
| | - Chunmei Wang
- Neurobiology Institute, Jining Medical University, Jining, Shandong 272067, P.R. China
| | - Chunqing Yang
- Neurobiology Institute, Jining Medical University, Jining, Shandong 272067, P.R. China
| | - Yanyou Pan
- Neurobiology Institute, Jining Medical University, Jining, Shandong 272067, P.R. China
| | - Jing Chen
- Division of Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK
| | - Baohua Cheng
- Neurobiology Institute, Jining Medical University, Jining, Shandong 272067, P.R. China
| | - Bo Bai
- Neurobiology Institute, Jining Medical University, Jining, Shandong 272067, P.R. China
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152
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Neuritin Attenuates Neuronal Apoptosis Mediated by Endoplasmic Reticulum Stress In Vitro. Neurochem Res 2018; 43:1383-1391. [PMID: 29790068 PMCID: PMC6006204 DOI: 10.1007/s11064-018-2553-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 03/28/2018] [Accepted: 05/16/2018] [Indexed: 12/11/2022]
Abstract
Neuritin is an extracellular glycophosphatidylinositol-linked protein that promotes neuronal survival, differentiation, function, and repair, but the exact mechanism of this neuroprotective effect remains unclear. Meanwhile, endoplasmic reticulum stress (ERS) induced apoptosis is attracting increased attention. In this work, we hypothesized that neuritin inhibited ERS to protect cortical neurons. To check this hypothesis, we exposed primary cultured cortical neurons to oxygen and glucose deprivation (OGD) for 45 min followed by reperfusion (R) to activate ERS. We then performed resuscitation for 6, 12, 24, and 48 h. ERS-related factors such as glucose-regulated protein 78 (GRP78), caspase-12 and CHOP were detected by Western blotting and quantitative real-time polymerase chain reaction assay. Apoptosis was assessed by Annexin V binding and propidium iodide staining. Ultrastructural changes of endoplasmic reticulum were observed under a transmission electron microscope. Results showed that GRP78 expression significantly increased at 12, 24, and 48 h and peaked at 24 h. Caspase-12 and CHOP expression significantly increased in a time-dependent manner at 12, 24, and 48 h. GRP78, caspase-12 and CHOP expression as well as apoptosis rate of primary cultured neurons and the ultrastructural changes of endoplasmic reticulum in the OGD/R + neuritin group significantly improved compared with the OGD/R group. In conclusion, the neuroprotection function of neuritin may be involved in ERS pathways.
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Jin X, Kim DK, Riew TR, Kim HL, Lee MY. Cellular and Subcellular Localization of Endoplasmic Reticulum Chaperone GRP78 Following Transient Focal Cerebral Ischemia in Rats. Neurochem Res 2018; 43:1348-1362. [PMID: 29774449 DOI: 10.1007/s11064-018-2550-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/13/2018] [Accepted: 05/13/2018] [Indexed: 12/20/2022]
Abstract
The 78-kDa glucose-regulated protein (GRP78), a chaperone protein located in the endoplasmic reticulum (ER), has been reported to have neuroprotective effects in the injured central nervous system. Our aim was to examine the expression profiles and subcellular distributions of GRP78 and its association with the neuroglial reaction in the rat striatum after transient, focal cerebral ischemia. In sham-operated rats, constitutive, specific immunoreactivity for GRP78 was almost exclusively localized to the rough ER of striatal neurons, with none in the resting, ramified microglia or astrocytes. At 1 day post reperfusion, increased expression was observed in ischemia-resistant cholinergic interneurons, when most striatal neurons had lost GRP78 expression (this occurred earlier than the loss of other neuronal markers). By 3 days post reperfusion, GRP78 expression had re-emerged in association with the activation of glial cells in both infarct and peri-infarct areas but showed different patterns in the two regions. Most of the expression induced in the infarct area could be attributed to brain macrophages, while expression in the peri-infarct area predominantly occurred in neurons and reactive astrocytes. A gradual, sustained induction of GRP78 immunoreactivity occurred in reactive astrocytes localized to the astroglial scar, lasting for at least 28 days post reperfusion. Using correlative light- and electron-microscopy, we found conspicuous GRP78 protein localized to abnormally prominent, dilated rough ER in both glial cell types. Thus, our data indicate a link between GRP78 expression and the activated functional status of neuroglial cells, predominantly microglia/macrophages and astrocytes, occurring in response to ischemia-induced ER stress.
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Affiliation(s)
- Xuyan Jin
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06501, Republic of Korea
| | - Dong Kyu Kim
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06501, Republic of Korea
| | - Tae-Ryong Riew
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06501, Republic of Korea
| | - Hong Lim Kim
- Integrative Research Support Center, Laboratory of Electron Microscopy, College of Medicine, The Catholic University of Korea, Seoul, 06501, Republic of Korea
| | - Mun-Yong Lee
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 06501, Republic of Korea.
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154
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Gu Y, Huang F, Wang Y, Chen C, Wu S, Zhou S, Hei Z, Yuan D. Connexin32 plays a crucial role in ROS-mediated endoplasmic reticulum stress apoptosis signaling pathway in ischemia reperfusion-induced acute kidney injury. J Transl Med 2018; 16:117. [PMID: 29728112 PMCID: PMC5935959 DOI: 10.1186/s12967-018-1493-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 04/21/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ischemia-reperfusion (I/R)-induced acute kidney injury (AKI) not only prolongs the length of hospital stay, but also seriously affects the patient's survival rate. Although our previous investigation has verified that reactive oxygen species (ROS) transferred through gap junction composed of connexin32 (Cx32) contributed to AKI, its underlying mechanisms were not fully understood and viable preventive or therapeutic regimens were still lacking. Among various mechanisms involved in organs I/R-induced injuries, endoplasmic reticulum stress (ERS)-related apoptosis is currently considered to be an important participant. Thus, in present study, we focused on the underlying mechanisms of I/R-induced AKI, and postulated that Cx32 mediated ROS/ERS/apoptosis signal pathway activation played an important part in I/R-induced AKI. METHODS We established renal I/R models with Cx32+/+ and Cx32-/- mice, which underwent double kidneys clamping and recanalization. ROS scavenger (N-acetylcysteine, NAC) and ERS inhibitors (4-phenyl butyric acid, 4-PBA, and tauroursodeoxycholic acid, TUDCA) were used to decrease the content of ROS and attenuate ERS activation, respectively. RESULTS Renal damage was progressively exacerbated in a time-dependent manner at the reperfusion stage, that was consistent with the alternation of ERS activation, including glucose regulated protein 78 (BiP/GRP78), X box-binding protein1, and C/EBP homologous protein expression. TUDCA or 4-PBA application attenuated I/R-induced ERS activation and protected against renal tubular epithelial cells apoptosis and renal damage. Cx32 deficiency decreased ROS generation and distribution between the neighboring cells, which attenuated I/R-induced ERS activation, and improved cell apoptosis and renal damage. CONCLUSION Cx32 mediated ROS/ERS/apoptosis signal pathway activation played an important part in I/R-induced AKI. Cx32 deficiency, ROS elimination, and ERS inhibition all could protect against I/R-induced AKI.
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Affiliation(s)
- Yu Gu
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, 510630 Guangdong Province China
| | - Fei Huang
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, 510630 Guangdong Province China
| | - Yanling Wang
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, 510630 Guangdong Province China
| | - Chaojin Chen
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, 510630 Guangdong Province China
| | - Shan Wu
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, 510630 Guangdong Province China
| | - Shaoli Zhou
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, 510630 Guangdong Province China
| | - Ziqing Hei
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, 510630 Guangdong Province China
| | - Dongdong Yuan
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, No. 600 Tianhe Road, Guangzhou, 510630 Guangdong Province China
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155
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GRP78 Promotes Neural Stem Cell Antiapoptosis and Survival in Response to Oxygen-Glucose Deprivation (OGD)/Reoxygenation through PI3K/Akt, ERK1/2, and NF- κB/p65 Pathways. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:3541807. [PMID: 29849883 PMCID: PMC5914129 DOI: 10.1155/2018/3541807] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/08/2018] [Accepted: 03/18/2018] [Indexed: 12/17/2022]
Abstract
When brain injury happens, endogenous neural stem cells (NSCs) located in the adult subventricular zone (SVZ) and subgranular zone (SGZ) are attacked by ischemia/reperfusion to undergo cellular apoptosis and death before being induced to migrate to the lesion point and differentiate into mature neural cells for damaged cell replacement. Although promoting antiapoptosis and NSC survival are critical to neuroregeneration, the mechanism has yet been elucidated clearly. Here in this study, we established an in vitro oxygen-glucose deprivation (OGD)/reoxygenation model on NSCs and detected glucose-regulated protein 78 (GRP78) involved in apoptosis, while in the absence of GRP78 by siRNA transfection, OGD/reoxygenation triggered PI3K/Akt, ERK1/2, and NF-κB/p65 activation, and induced NSC apoptosis was attenuated. Further investigation, respectively, with the inhibitor of PI3K/Akt or ERK1/2 demonstrated a blockage on GRP78 upregulation, while the inhibition of NF-κB rarely affected GRP78 induction by OGD/reoxygenation. The results indicated the bidirectional regulations of GRP78-PI3K/Akt and GRP78-ERK1/2 and the one-way signalling transduction through GRP78 to NF-κB/p65 on NSC survival from OGD/reoxygenation. In conclusion, we found that GRP78 mediated the signalling cross talk through PI3K/Akt, ERK1/2, and NF-κB/p65, which leads to antiapoptosis and NSC survival from ischemic stroke. Our finding gives a new evidence of GRP78 in NSCs as well as a new piece of signalling mechanism elucidation to NSC survival from ischemic stroke.
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156
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Aran G, Sanjurjo L, Barcena C, Simon‐Coma M, Téllez É, Vázquez‐Vitali M, Garrido M, Guerra L, Díaz E, Ojanguren I, Elortza F, Planas R, Sala M, Armengol C, Sarrias M. CD5L is upregulated in hepatocellular carcinoma and promotes liver cancer cell proliferation and antiapoptotic responses by binding to HSPA5 (GRP78). FASEB J 2018; 32:3878-3891. [DOI: 10.1096/fj.201700941rr] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Gemma Aran
- Innate Immunity GroupHealth Sciences Research Institute Germans Trias i Pujol (IGTP)BadalonaSpain
| | - Lucía Sanjurjo
- Innate Immunity GroupHealth Sciences Research Institute Germans Trias i Pujol (IGTP)BadalonaSpain
- Network for Biomédical Research on Diabetes and Associated Metabolic Diseases (CIBERDEM)MadridSpain
| | - Cristina Barcena
- Innate Immunity GroupHealth Sciences Research Institute Germans Trias i Pujol (IGTP)BadalonaSpain
| | - Marina Simon‐Coma
- Childhood Liver Oncology GroupProgram of Predictive and Personalized Medicine of Cancer (PMPCC)IGTPBadalonaSpain
- Network for Biomedical Research in Hepatic and Digestive Diseases (CIBEREHD)Spain
| | - Érica Téllez
- Innate Immunity GroupHealth Sciences Research Institute Germans Trias i Pujol (IGTP)BadalonaSpain
| | - Maria Vázquez‐Vitali
- Childhood Liver Oncology GroupProgram of Predictive and Personalized Medicine of Cancer (PMPCC)IGTPBadalonaSpain
| | - Marta Garrido
- Pathology DepartmentVall D'Hebron HospitalBarcelonaSpain
| | - Laura Guerra
- Pathology DepartmentHospital Universitario La PazMadridSpain
| | - Esther Díaz
- Pathology DepartmentJosep Trueta HospitalGironaSpain
| | - Isabel Ojanguren
- Pathology DepartmentHospital Universitari Germans Trias i Pujol Hospital (HUGTiP)BadalonaSpain
| | - Felix Elortza
- Network for Biomedical Research in Hepatic and Digestive Diseases (CIBEREHD)Spain
- Proteomics PlatformCenter for Cooperative Research in Biosciences (CIC bioGUNE)DerioSpain
| | - Ramon Planas
- Network for Biomedical Research in Hepatic and Digestive Diseases (CIBEREHD)Spain
- Gastroenterology DepartmentHospital Universitari Germans Trias i Pujol Hospital (HUGTiP)BadalonaSpain
| | - Margarita Sala
- Network for Biomedical Research in Hepatic and Digestive Diseases (CIBEREHD)Spain
- Gastroenterology DepartmentHospital Universitari Germans Trias i Pujol Hospital (HUGTiP)BadalonaSpain
| | - Carolina Armengol
- Childhood Liver Oncology GroupProgram of Predictive and Personalized Medicine of Cancer (PMPCC)IGTPBadalonaSpain
- Network for Biomedical Research in Hepatic and Digestive Diseases (CIBEREHD)Spain
| | - Maria‐Rosa Sarrias
- Innate Immunity GroupHealth Sciences Research Institute Germans Trias i Pujol (IGTP)BadalonaSpain
- Network for Biomedical Research in Hepatic and Digestive Diseases (CIBEREHD)Spain
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157
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Cuesta-Mateos C, Alcaraz-Serna A, Somovilla-Crespo B, Muñoz-Calleja C. Monoclonal Antibody Therapies for Hematological Malignancies: Not Just Lineage-Specific Targets. Front Immunol 2018; 8:1936. [PMID: 29387053 PMCID: PMC5776327 DOI: 10.3389/fimmu.2017.01936] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 12/15/2017] [Indexed: 12/12/2022] Open
Abstract
Today, monoclonal antibodies (mAbs) are a widespread and necessary tool for biomedical science. In the hematological cancer field, since rituximab became the first mAb approved by the Food and Drug Administration for the treatment of B-cell malignancies, a number of effective mAbs targeting lineage-specific antigens (LSAs) have been successfully developed. Non-LSAs (NLSAs) are molecules that are not restricted to specific leukocyte subsets or tissues but play relevant pathogenic roles in blood cancers including the development, proliferation, survival, and refractoriness to therapy of tumor cells. In consequence, efforts to target NLSAs have resulted in a plethora of mAbs-marketed or in development-to achieve different goals like neutralizing oncogenic pathways, blocking tumor-related chemotactic pathways, mobilizing malignant cells from tumor microenvironment to peripheral blood, modulating immune-checkpoints, or delivering cytotoxic drugs into tumor cells. Here, we extensively review several novel mAbs directed against NLSAs undergoing clinical evaluation for treating hematological malignancies. The review focuses on the structure of these antibodies, proposed mechanisms of action, efficacy and safety profile in clinical studies, and their potential applications in the treatment of hematological malignancies.
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Affiliation(s)
- Carlos Cuesta-Mateos
- Servicio de Inmunología, Instituto de Investigación Sanitaria Hospital Universitario de La Princesa, Madrid, Spain
- IMMED S.L., Immunological and Medicinal Products, Madrid, Spain
| | - Ana Alcaraz-Serna
- Servicio de Inmunología, Instituto de Investigación Sanitaria Hospital Universitario de La Princesa, Madrid, Spain
| | - Beatriz Somovilla-Crespo
- Department of Immunology and Oncology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Cecilia Muñoz-Calleja
- Servicio de Inmunología, Instituto de Investigación Sanitaria Hospital Universitario de La Princesa, Madrid, Spain
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158
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Lu Z, Lin Y, Peng B, Bao Z, Niu K, Gong J. Hydrogen-Rich Saline Ameliorates Hepatic Ischemia-Reperfusion Injury Through Regulation of Endoplasmic Reticulum Stress and Apoptosis. Dig Dis Sci 2017; 62:3479-3486. [PMID: 29086332 DOI: 10.1007/s10620-017-4811-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 10/14/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To evaluate the effect of hydrogen-rich saline (HS) on hepatic ischemia-reperfusion (I/R) injury. METHODS Forty rats were randomly allocated into five groups: one sham group (control group), one group treated with 20 min of ischemia and normal saline (NS; I/R1 + NS group), one group treated with 20 min of ischemia and HS (I/R1 + HS group), one group treated with 60 min of ischemia and NS (I/R2 + NS group), and one group treated with 60 min of ischemia and HS (I/R2 + HS group). After reperfusion for 6 h, hepatic function, oxidative stress, pathological changes, and apoptosis of hepatic cells were evaluated. Furthermore, the expression levels of endoplasmic reticulum (ER) stress-associated proteins were identified. RESULTS Serum ALT and AST levels and tissue MDA content in the I/R + HS groups were significantly lower than those in the I/R + NS groups. Pathological changes were also significantly ameliorated in the HS groups compared with those in the NS groups. Moreover, HS appeared to significantly attenuate hepatic I/R-induced ER stress responses, as indicated by the decreased expression of C/EBP homologous protein, protein-kinase-RNA-like ER kinase, and inositol-requiring protein-1α, as well as the increased expression of GRP78 proteins. Finally, the levels of apoptotic markers such as caspase-3 and TUNEL-positive cells were significantly lower in the HS groups than in the NS control groups, whereas the level of Bcl2 protein increased in the HS groups. CONCLUSION The protective effect of HS can be attributed to ER stress and apoptosis inhibition.
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Affiliation(s)
- Zhiyuan Lu
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Yanzhu Lin
- Department of Radiation Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in Southern China, Sun Yat-Sen University, Guangzhou, People's Republic of China
| | - Bo Peng
- Department of General Surgery, The First Affiliated Hospital, Jinan University, Guangzhou, 510632, People's Republic of China
| | - Zhen Bao
- Department of General Surgery, The First Affiliated Hospital, Jinan University, Guangzhou, 510632, People's Republic of China
| | - Kexin Niu
- Department of General Surgery, The First Affiliated Hospital, Jinan University, Guangzhou, 510632, People's Republic of China
| | - Jin Gong
- Department of General Surgery, The First Affiliated Hospital, Jinan University, Guangzhou, 510632, People's Republic of China.
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Rahman S, Jan AT, Ayyagari A, Kim J, Kim J, Minakshi R. Entanglement of UPR ER in Aging Driven Neurodegenerative Diseases. Front Aging Neurosci 2017; 9:341. [PMID: 29114219 PMCID: PMC5660724 DOI: 10.3389/fnagi.2017.00341] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Accepted: 10/09/2017] [Indexed: 12/15/2022] Open
Abstract
The endoplasmic reticulum (ER) is an indispensable cellular organelle that remains highly active in neuronal cells. The ER bears the load of maintaining protein homeostasis in the cellular network by managing the folding of incoming nascent peptides; however, the stress imposed by physiological/environmental factors can cause ER dysfunctions that lead to the activation of ER unfolded protein response (UPRER). Aging leads to deterioration of several cellular pathways and therefore weakening of the UPRER. The decline in functioning of the UPRER during aging results in accumulation of misfolded proteins that becomes intracellular inclusions in neuronal cells, resulting in toxicity manifested as neurodegenerative diseases. With ascension in cases of neurodegenerative diseases, understanding the enigma behind aging driven UPRER dysfunction may lead to possible treatments.
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Affiliation(s)
- Safikur Rahman
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan, South Korea
| | - Arif Tasleem Jan
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan, South Korea
| | - Archana Ayyagari
- Department of Microbiology, Swami Shraddhanand College, University of Delhi, New Delhi, India
| | - Jiwoo Kim
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan, South Korea
| | - Jihoe Kim
- Department of Medical Biotechnology, Yeungnam University, Gyeongsan, South Korea
| | - Rinki Minakshi
- Institute of Home Economics, University of Delhi, New Delhi, India
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160
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Guha P, Kaptan E, Gade P, Kalvakolanu DV, Ahmed H. Tunicamycin induced endoplasmic reticulum stress promotes apoptosis of prostate cancer cells by activating mTORC1. Oncotarget 2017; 8:68191-68207. [PMID: 28978108 PMCID: PMC5620248 DOI: 10.18632/oncotarget.19277] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 06/10/2017] [Indexed: 01/11/2023] Open
Abstract
Studies suggest that tunicamycin may work as a therapeutic drug to cancer cells by inducing stress in the endoplasmic reticulum (ER) through unfolded protein response (UPR) and thereby promoting apoptosis. However, mechanisms of the prolonged activation of the UPR under sustained ER stress in the regulation of cell apoptosis are largely unknown. To delineate the role of candidate genes in the apoptotic process under ER stress and to search for new therapeutic strategies to treat metastatic castration resistant prostate cancer, we performed whole genome expression microarray analysis in tunicamycin treated metastatic androgen-insensitive prostate cancer cells, PC-3. Among several induced genes, the expression of eNOS (NOS3) gene was remarkably high. The increased expression of eNOS activates mTORC1 through RagC. This results into an accumulation of p62 (SQSTM1) which facilitates aggregation of ubiquitinated protein thus compromising clearance of misfolded toxic protein aggregates. Lastly, association of p62 proteins and misfolded proteins promote reactive oxygen species (ROS) mediated mitochondrial apoptosis. Overall, our data demonstrate that tunicamycin induced ER stress promotes prostate cancer cell death by activating mTORC1 through eNOS-RagC pathway.
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Affiliation(s)
- Prasun Guha
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine and Institute of Marine and Environmental Technology, Baltimore, Maryland, USA
- Current address: The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Engin Kaptan
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine and Institute of Marine and Environmental Technology, Baltimore, Maryland, USA
- Current address: Department of Biology, Istanbul University, Vezneciler, Istanbul, Turkey
| | - Padmaja Gade
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Dhananjaya V. Kalvakolanu
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, USA
- University of Maryland Greenebaum Cancer Center, Baltimore, Maryland, USA
| | - Hafiz Ahmed
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine and Institute of Marine and Environmental Technology, Baltimore, Maryland, USA
- University of Maryland Greenebaum Cancer Center, Baltimore, Maryland, USA
- Current address: GlycoMantra Inc., Baltimore, Maryland, USA
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161
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Sakono M, Kidani T. ATP-independent inhibition of amyloid beta fibrillation by the endoplasmic reticulum resident molecular chaperone GRP78. Biochem Biophys Res Commun 2017; 493:500-503. [PMID: 28870813 DOI: 10.1016/j.bbrc.2017.08.162] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 08/31/2017] [Indexed: 10/18/2022]
Abstract
Neuronal cell death induced by an accumulation of amyloid beta (Aβ) peptides, which are pathogenic molecules for Alzheimer's disease, is closely related with endoplasmic reticulum (ER) stress. In the ER stress condition, part of the ER resident chaperones is known to be translocated to another cellular location, such as the cell surface. The ER chaperone 78-kDa glucose-regulated protein (GRP78), which shows ATP-dependent chaperone activity, also shows translocation to the cell surface. In this study, we examined the influence of GRP78 on Aβ fibrillation in the presence or absence of ATP. We revealed that a small amount of GRP78 effectively inhibited fibrillation of Aβ fragments. Intriguingly, the fibrillation inhibition by GRP78 was confirmed in the absence of ATP, suggesting GRP78 exhibited ATP-independent interaction with Aβ fragments.
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Affiliation(s)
- Masafumi Sakono
- Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-855, Japan.
| | - Tomoya Kidani
- Department of Applied Chemistry, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama 930-855, Japan
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Xu X, Huang E, Tai Y, Zhao X, Chen X, Chen C, Chen R, Liu C, Lin Z, Wang H, Xie WB. Nupr1 Modulates Methamphetamine-Induced Dopaminergic Neuronal Apoptosis and Autophagy through CHOP-Trib3-Mediated Endoplasmic Reticulum Stress Signaling Pathway. Front Mol Neurosci 2017; 10:203. [PMID: 28694771 PMCID: PMC5483452 DOI: 10.3389/fnmol.2017.00203] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 06/08/2017] [Indexed: 12/13/2022] Open
Abstract
Methamphetamine (METH) is an illegal and widely abused psychoactive stimulant. METH exposure causes detrimental effects on multiple organ systems, primarily the nervous system, especially dopaminergic pathways, in both laboratory animals and humans. In this study, we hypothesized that Nuclear protein 1 (Nupr1/com1/p8) is involved in METH-induced neuronal apoptosis and autophagy through endoplasmic reticulum (ER) stress signaling pathway. To test this hypothesis, we measured the expression levels of Nupr1, ER stress protein markers CHOP and Trib3, apoptosis-related protein markers cleaved-caspase3 and PARP, as well as autophagy-related protein markers LC3 and Beclin-1 in brain tissues of adult male Sprague-Dawley (SD) rats, rat primary cultured neurons and the rat adrenal pheochromocytoma cells (PC12 cells) after METH exposure. We also determined the effects of METH exposure on the expression of these proteins after silencing Nupr1, CHOP, or Trib3 expression with synthetic small hairpin RNA (shRNA) or siRNA in vitro, and after silencing Nupr1 in the striatum of rats by injecting lentivirus containing shRNA sequence targeting Nupr1 gene to rat striatum. The results showed that METH exposure increased Nupr1 expression that was accompanied with increased expression of ER stress protein markers CHOP and Trib3, and also led to apoptosis and autophagy in rat primary neurons and in PC12 cells after 24 h exposure (3.0 mM), and in the prefrontal cortex and striatum of rats after repeated intraperitoneal injections (15 mg/kg × 8 injections at 12 h intervals). Silencing of Nupr1 expression partly reduced METH-induced apoptosis and autophagy in vitro and in vivo. These results suggest that Nupr1 plays an essential role in METH-caused neuronal apoptosis and autophagy at relatively higher doses and may be a potential therapeutic target in high-dose METH-induced neurotoxicity.
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Affiliation(s)
- Xiang Xu
- School of Forensic Medicine, Southern Medical UniversityGuangzhou, China.,School of Forensic Medicine, Wannan Medical CollegeWuhu, China
| | - Enping Huang
- School of Forensic Medicine, Southern Medical UniversityGuangzhou, China
| | - Yunchun Tai
- School of Forensic Medicine, Southern Medical UniversityGuangzhou, China
| | - Xu Zhao
- School of Forensic Medicine, Southern Medical UniversityGuangzhou, China
| | - Xuebing Chen
- School of Forensic Medicine, Southern Medical UniversityGuangzhou, China
| | - Chuanxiang Chen
- School of Forensic Medicine, Southern Medical UniversityGuangzhou, China
| | - Rui Chen
- Department of Forensic Medicine, Guangdong Medical UniversityDongguan, China
| | - Chao Liu
- Guangzhou Forensic Science InstituteGuangzhou, China
| | - Zhoumeng Lin
- Institute of Computational Comparative Medicine and Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State UniversityManhattan, KS, United States
| | - Huijun Wang
- School of Forensic Medicine, Southern Medical UniversityGuangzhou, China
| | - Wei-Bing Xie
- School of Forensic Medicine, Southern Medical UniversityGuangzhou, China
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