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Zhang X, Wang B, Luo Y, Ding CF, Yan Y. An amino-rich polymer-coated magnetic nanomaterial for ultra-rapid separation of phosphorylated peptides in the serum of Parkinson's disease patients. Anal Bioanal Chem 2024; 416:3361-3371. [PMID: 38607383 DOI: 10.1007/s00216-024-05287-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/31/2024] [Accepted: 04/02/2024] [Indexed: 04/13/2024]
Abstract
The elucidation of disease pathogenesis can be achieved by analyzing the low-abundance phosphopeptides in organisms. Herein, we developed a novel and easy-to-prepare polymer-coated nanomaterial. By improving the hydrophilicity and spatial conformation of the material, we effectively enhanced the adsorption of phosphopeptides and demonstrated excellent enrichment properties. The material was able to successfully enrich the phosphopeptides in only 1 min. Meanwhile, the material has high selectivity (1:2000), good loading capacity (100 μg/mg), excellent sensitivity (0.5 fmol), and great acid and alkali resistance. In addition, the material was applied to real samples, and 70 phosphopeptides were enriched from the serum of Parkinson's disease (PD) patients and 67 phosphopeptides were enriched from the serum of normal controls. Sequences Logo showed that PD is probably associated with threonine, glutamate, serine, and glutamine. Finally, gene ontology (GO) analysis was performed on phosphopeptides enriched in PD patients' serum. The results showed that PD patients expressed abnormal expression of the cholesterol metabolic process and cell-matrix adhesion in the biological process (BP), endoplasmic reticulum and lipoprotein in the cellular component (CC), and heparin-binding, lipid-binding, and receptor-binding in the molecular function (MF) as compared with normal individuals. All the experiments indicate that the nanomaterials have great potential in proteomics studies.
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Affiliation(s)
- Xiaoya Zhang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Bing Wang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Yiting Luo
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Chuan-Fan Ding
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, Zhejiang, China.
| | - Yinghua Yan
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, Zhejiang, China.
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2
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Ma LW, Liu YF, Zhang H, Huang CJ, Li A, Qu XZ, Lin JP, Yang Y, Yao YX. Electroacupuncture attenuates neuropathic pain via suppressing BIP-IRE-1α-mediated endoplasmic reticulum stress in the anterior cingulate cortex. Biol Res 2024; 57:34. [PMID: 38812057 PMCID: PMC11134655 DOI: 10.1186/s40659-024-00511-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 04/30/2024] [Indexed: 05/31/2024] Open
Abstract
Studies have suggested that endoplasmic reticulum stress (ERS) is involved in neurological dysfunction and that electroacupuncture (EA) attenuates neuropathic pain (NP) via undefined pathways. However, the role of ERS in the anterior cingulate cortex (ACC) in NP and the effect of EA on ERS in the ACC have not yet been investigated. In this study, an NP model was established by chronic constriction injury (CCI) of the left sciatic nerve in rats, and mechanical and cold tests were used to evaluate behavioral hyperalgesia. The protein expression and distribution were evaluated using western blotting and immunofluorescence. The results showed that glucose-regulated protein 78 (BIP) and inositol-requiring enzyme 1α (IRE-1α) were co-localized in neurons in the ACC. After CCI, BIP, IRE-1α, and phosphorylation of IRE-1α were upregulated in the ACC. Intra-ACC administration of 4-PBA and Kira-6 attenuated pain hypersensitivity and downregulated phosphorylation of IRE-1α, while intraperitoneal injection of 4-PBA attenuated hyperalgesia and inhibited the activation of P38 and JNK in ACC. In contrast, ERS activation by intraperitoneal injection of tunicamycin induced behavioral hyperalgesia in naive rats. Furthermore, EA attenuated pain hypersensitivity and inhibited the CCI-induced overexpression of BIP and pIRE-1α. Taken together, these results demonstrate that EA attenuates NP by suppressing BIP- and IRE-1α-mediated ERS in the ACC. Our study presents novel evidence that ERS in the ACC is implicated in the development of NP and provides insights into the molecular mechanisms involved in the analgesic effect of EA.
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Affiliation(s)
- Lin-Wei Ma
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, China
- Department of Anesthesia, First People's Hospital of Linping District of Hangzhou City, 369 Yingbin Road, Hangzhou, 311100, China
| | - Yu-Fan Liu
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, China
| | - Hui Zhang
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, China
| | - Chang-Jun Huang
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, China
- Department of Anesthesia, First People's Hospital of Linping District of Hangzhou City, 369 Yingbin Road, Hangzhou, 311100, China
| | - Ang Li
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, China
| | - Xin-Zhe Qu
- Department of Orthopedics, Graduated School, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, 221004, China
| | - Jia-Piao Lin
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, China
| | - Yan Yang
- Department of Neurobiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou, 310020, China.
- School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, 310058, China.
| | - Yong-Xing Yao
- Department of Anesthesia, First Affiliated Hospital, Zhejiang University School of Medicine, 79 Qingchun Road, Hangzhou, 310003, China.
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Yuzawa S, Nakashio M, Ichimura S, Shimoda M, Nakashima A, Marukawa-Hashimoto Y, Kawano Y, Suzuki K, Yoshitomi K, Kawahara M, Tanaka KI. Ergothioneine Prevents Neuronal Cell Death Caused by the Neurotoxin 6-Hydroxydopamine. Cells 2024; 13:230. [PMID: 38334622 PMCID: PMC10854700 DOI: 10.3390/cells13030230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Neuronal cell death is a key mechanism involved in the development and exacerbation of Parkinson's disease (PD). The excessive production of reactive oxygen species (ROS) is a major cause leading to neuronal death; therefore, compounds that prevent oxidative stress-dependent neuronal death may be promising as a preventive method for PD. Ergothioneine is a natural amino acid with antioxidant properties, and its protective functions in the body are attracting attention. However, there has been no investigation into the protective functions of ergothioneine using in vivo and in vitro PD models. Thus, in this study, we analyzed the efficacy of ergothioneine against 6-hydroxydopamine (6-OHDA)-dependent neuronal cell death using immortalized hypothalamic neurons (GT1-7 cells). First, we found that ergothioneine prevents 6-OHDA-dependent neuronal cell death by suppressing ROS overproduction in GT1-7 cells. The cytoprotective effect of ergothioneine was partially abolished by verapamil, an inhibitor of OCTN1, which is involved in ergothioneine uptake. Furthermore, ergothioneine-rich Rice-koji (Ergo-koji) showed cytoprotective and antioxidant effects similar to those of ergothioneine. Taken together, these results suggest that ergothioneine or foods containing ergothioneine may be an effective method for preventing the development and progression of PD.
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Affiliation(s)
- Saho Yuzawa
- Laboratory of Bio-Analytical Chemistry, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo, Tokyo 202-8585, Japan; (S.Y.); (M.N.); (S.I.); (M.S.); (M.K.)
| | - Motonari Nakashio
- Laboratory of Bio-Analytical Chemistry, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo, Tokyo 202-8585, Japan; (S.Y.); (M.N.); (S.I.); (M.S.); (M.K.)
| | - Suzuna Ichimura
- Laboratory of Bio-Analytical Chemistry, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo, Tokyo 202-8585, Japan; (S.Y.); (M.N.); (S.I.); (M.S.); (M.K.)
| | - Mikako Shimoda
- Laboratory of Bio-Analytical Chemistry, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo, Tokyo 202-8585, Japan; (S.Y.); (M.N.); (S.I.); (M.S.); (M.K.)
| | - Ayaka Nakashima
- Euglena, Co., Ltd., 5-29-11 G-BASE Tamachi 2nd Floor Shiba, Minato-ku, Tokyo 108-0014, Japan; (A.N.); (Y.M.-H.); (K.S.)
| | - Yuka Marukawa-Hashimoto
- Euglena, Co., Ltd., 5-29-11 G-BASE Tamachi 2nd Floor Shiba, Minato-ku, Tokyo 108-0014, Japan; (A.N.); (Y.M.-H.); (K.S.)
| | - Yusuke Kawano
- Euglena, Co., Ltd., 5-29-11 G-BASE Tamachi 2nd Floor Shiba, Minato-ku, Tokyo 108-0014, Japan; (A.N.); (Y.M.-H.); (K.S.)
| | - Kengo Suzuki
- Euglena, Co., Ltd., 5-29-11 G-BASE Tamachi 2nd Floor Shiba, Minato-ku, Tokyo 108-0014, Japan; (A.N.); (Y.M.-H.); (K.S.)
| | - Kenichi Yoshitomi
- Sakichi, Co., Ltd., 5-531 Kuromaru-Machi, Omura, Nagasaki 856-0808, Japan;
| | - Masahiro Kawahara
- Laboratory of Bio-Analytical Chemistry, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo, Tokyo 202-8585, Japan; (S.Y.); (M.N.); (S.I.); (M.S.); (M.K.)
| | - Ken-ichiro Tanaka
- Laboratory of Bio-Analytical Chemistry, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo, Tokyo 202-8585, Japan; (S.Y.); (M.N.); (S.I.); (M.S.); (M.K.)
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Wang KW, Zhan CP, Liu YQ, Fu ZZ, Qiu TW, Yu GF. A prospective observational study on utility of serum mesencephalic astrocyte-derived neurotrophic factor as a promising prognostic biomarker of severe traumatic brain injury in humans. Clin Chim Acta 2023; 545:117370. [PMID: 37137461 DOI: 10.1016/j.cca.2023.117370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/13/2023] [Accepted: 04/25/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Mesencephalic astrocyte-derived neurotrophic factor (MANF) is released under endoplasmic reticulum stress, thereby exerting neuroprotective effects. We determined whether serum MANF may be a prognostic biomarker of human severe traumatic brain injury (sTBI). METHODS Serum MANF concentrations of 137 sTBI patients and 137 controls were quantified in this prospective cohort study. Patients with extended Glasgow outcome scale (GOSE) scores of 1-4 at post-traumatic 6 months were considered to have poor prognosis. Relationships between serum MANF concentrations and severity plus prognosis were investigated using multivariate analyses. Area under receiver operating characteristic curve (AUC) was calculated for reflecting prognostic efficiency. RESULTS As compared to controls, there was a significant increase of serum MANF concentrations after sTBI (median, 18.5 ng/ml versus 3.0 ng/ml; P<0.001), which was independently correlated with Glasgow coma scale (GCS) scores [β, -3.000; 95% confidence interval (CI), -4.525--1.476; VIF, 2.216; P=0.001], Rotterdam computed tomography (CT) scores (β, 4.020; 95% CI, 1.446-6.593; VIF, 2.234; P=0.002) and GOSE scores (β, -0.056; 95% CI, -0.089--0.023; VIF, 1.743; P=0.011). Serum MANF concentrations substantially distinguished risk of poor prognosis with AUC of 0.795 (95% CI, 0.718-0.859) and its concentrations >23.9 ng/ml was predictive of poor prognosis with 67.7% sensitivity and 81.9% specificity. Serum MANF concentrations combined with GCS scores and Rotterdam CT scores displayed markedly higher prognostic predictive ability than each of them (all P<0.05). Using restricted cubic spline, there was a linear correlation between serum MANF concentrations and poor prognosis (P=0.256). Serum MANF concentrations > 23.9 ng/ml was independently associated with poor prognosis (odds ratio, 2.911; 95% CI, 1.057-8.020; P=0.039). A nomogram was built, where serum MANF concentrations > 23.9 ng/ml, GCS scores and Rotterdam CT scores were integrated. Hosmer and Lemeshow test, calibration curve and decision curve analysis demonstrated such a prediction model was comparatively stable and was of relatively high clinical benefit. CONCLUSIONS Substantially increased serum MANF concentrations after sTBI are highly correlated with traumatic severity and are independently predictive of long-term poor prognosis, suggesting that serum MANF may represent a useful prognostic biochemical marker of human sTBI.
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Affiliation(s)
- Ke-Wei Wang
- The Second School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, People's Republic of China
| | - Cheng-Peng Zhan
- Department of Neurosurgery, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, Quzhou, People's Republic of China
| | - Yong-Qi Liu
- The Second School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, People's Republic of China
| | - Zhi-Zhan Fu
- Department of Neurosurgery, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, Quzhou, People's Republic of China
| | - Tian-Wen Qiu
- Department of Neurosurgery, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, Quzhou, People's Republic of China
| | - Guo-Feng Yu
- Department of Neurosurgery, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, Quzhou, People's Republic of China.
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Keylani K, Arbab Mojeni F, Khalaji A, Rasouli A, Aminzade D, Karimi MA, Sanaye PM, Khajevand N, Nemayandeh N, Poudineh M, Azizabadi Farahani M, Esfandiari MA, Haghshoar S, Kheirandish A, Amouei E, Abdi A, Azizinezhad A, Khani A, Deravi N. Endoplasmic reticulum as a target in cardiovascular diseases: Is there a role for flavonoids? Front Pharmacol 2023; 13:1027633. [PMID: 36703744 PMCID: PMC9871646 DOI: 10.3389/fphar.2022.1027633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 12/19/2022] [Indexed: 01/11/2023] Open
Abstract
Flavonoids are found in natural health products and plant-based foods. The flavonoid molecules contain a 15-carbon skeleton with the particular structural construction of subclasses. The most flavonoid's critical subclasses with improved health properties are the catechins or flavonols (e.g., epigallocatechin 3-gallate from green tea), the flavones (e.g., apigenin from celery), the flavanones (e.g., naringenin from citrus), the flavanols (e.g., quercetin glycosides from berries, onion, and apples), the isoflavones (e.g., genistein from soya beans) and the anthocyanins (e.g., cyanidin-3-O-glucoside from berries). Scientific data conclusively demonstrates that frequent intake of efficient amounts of dietary flavonoids decreases chronic inflammation and the chance of oxidative stress expressing the pathogenesis of human diseases like cardiovascular diseases (CVDs). The endoplasmic reticulum (ER) is a critical organelle that plays a role in protein folding, post-transcriptional conversion, and transportation, which plays a critical part in maintaining cell homeostasis. Various stimuli can lead to the creation of unfolded or misfolded proteins in the endoplasmic reticulum and then arise in endoplasmic reticulum stress. Constant endoplasmic reticulum stress triggers unfolded protein response (UPR), which ultimately causes apoptosis. Research has shown that endoplasmic reticulum stress plays a critical part in the pathogenesis of several cardiovascular diseases, including diabetic cardiomyopathy, ischemic heart disease, heart failure, aortic aneurysm, and hypertension. Endoplasmic reticulum stress could be one of the crucial points in treating multiple cardiovascular diseases. In this review, we summarized findings on flavonoids' effects on the endoplasmic reticulum and their role in the prevention and treatment of cardiovascular diseases.
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Affiliation(s)
- Kimia Keylani
- School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fariba Arbab Mojeni
- Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | | | - Asma Rasouli
- School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Dlnya Aminzade
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Amin Karimi
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Nazanin Khajevand
- Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Nasrin Nemayandeh
- Drug and Food Control Department, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | | | | | - Mohammad Ali Esfandiari
- Student Research Committee, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Sepehr Haghshoar
- Faculty of Pharmacy, Cyprus International University, Nicosia, Cyprus
| | - Ali Kheirandish
- Student Research Committee, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Erfan Amouei
- Research Center for Prevention of Cardiovascular Disease, Institute of Endocrinology and Metabolism, Iran University of Medical Science, Tehran, Iran
| | - Amir Abdi
- Student Research Committee, School of Medicine, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Arash Azizinezhad
- Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Afshin Khani
- Department of Cardiovascular Disease, Cardiovascular Research Center, Mazandaran University of Medical Sciences, Sari, Iran
| | - Niloofar Deravi
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran,*Correspondence: Niloofar Deravi,
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6
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Dai X, Yu F, Jiang Z, Dong B, Kong X. A fast fluorescent probe for tracing endoplasmic reticulum-located carboxylesterase in living cells. LUMINESCENCE 2022; 37:2067-2073. [PMID: 36200455 DOI: 10.1002/bio.4392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 09/22/2022] [Accepted: 09/28/2022] [Indexed: 12/14/2022]
Abstract
Carboxylesterase (CEs), mainly localized in endoplasmic reticulum (ER), are responsible for hydrolyzing compounds containing various ester bonds. They have been closely associated with drug metabolism and cellular homeostasis. Although some CE fluorescent probes have been developed, there are still a lack of probes that could target to the ER. Here, we developed a novel fluorescent probe CR with a specific ER anchor for monitoring CEs. In CR, p-toluenesulfonamide was chosen for precise ER targeting. A simple acetyl moiety was used as the CE response site and fluorescence modulation unit. During the spectral tests, CR displayed a fast response speed (within 10 s) towards CEs. In addition, it showed high sensitivity [limit of detection (LOD) = 5.1 × 10-3 U/ml] and high selectivity with CEs. In biological imaging, probe CR could especially locate in the ER in HepG2 cells. After cells were treated with orilistat, CR succeeded in monitoring the changes in the CEs. Importantly, CR also had the ability to trace the changes in CEs in a tunicamycin-induced ER stress model. Therefore, probe CR could be a powerful molecular tool for further investigating the functions of CEs in the ER.
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Affiliation(s)
- Xiaoyu Dai
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, China
| | - Faqi Yu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, China
| | - Zekun Jiang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, China
| | - Baoli Dong
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, China
| | - Xiuqi Kong
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, China
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7
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Hao Y, Li J, Yue S, Wang S, Hu S, Li B. Neuroprotective Effect and Possible Mechanisms of Berberine in Diabetes-Related Cognitive Impairment: A Systematic Review and Meta-Analysis of Animal Studies. Front Pharmacol 2022; 13:917375. [PMID: 35734409 PMCID: PMC9208278 DOI: 10.3389/fphar.2022.917375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 05/02/2022] [Indexed: 12/09/2022] Open
Abstract
Berberine, the main bioactive component of Coptis chinensis Franch., is widely used in the treatment of diabetes. Previous studies have reported that berberine supplementation may play a multitarget therapeutic role in diabetes-related cognitive impairment (DCI). This systematic review and meta-analysis evaluated the effect and possible mechanisms of berberine in animal models of DCI. Relevant studies were searched through PubMed, Web of Science, Embase, and three Chinese databases (CNKI, Wanfang, and VIP) until March 2022. Twenty studies involving 442 animals were included, and SYRCLE’s risk of bias tool was used to assess methodological quality. The statistical analysis was performed using STATA 15.0 to calculate the weighted standard mean difference (SMD) with a 95% confidence interval (CI). The fasting blood glucose (FBG) and Morris water maze test (MWM) were the main outcomes to be analyzed. The overall results showed that berberine could significantly improve FBG, escape latency, the times of crossing the platform, the time spent in the target quadrant, serum insulin, 2hBG of oral glucose tolerance test (OGTT), amyloid β (Aβ), acetylcholinesterase (AChE), oxidative stress, and inflammation levels. The present meta-analysis demonstrated that berberine could not only lower blood glucose levels but also improve learning and memory in DCI animal models, which might involve regulating glucose and lipid metabolism, improving insulin resistance, anti-oxidation, anti-neuroinflammation, inhibiting endoplasmic reticulum (ER) stress; and improving the cholinergic system. However, additional attention should be paid to these outcomes due to the significant heterogeneity.
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Affiliation(s)
- Yanwei Hao
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jiaxin Li
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Shengnan Yue
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Shaofeng Wang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Shuangyuan Hu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Bin Li
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Bin Li,
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Critical roles of protein disulfide isomerases in balancing proteostasis in the nervous system. J Biol Chem 2022; 298:102087. [PMID: 35654139 PMCID: PMC9253707 DOI: 10.1016/j.jbc.2022.102087] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 05/05/2022] [Accepted: 05/08/2022] [Indexed: 02/08/2023] Open
Abstract
Protein disulfide isomerases (PDIs) constitute a family of oxidoreductases promoting redox protein folding and quality control in the endoplasmic reticulum. PDIs catalyze disulfide bond formation, isomerization, and reduction, operating in concert with molecular chaperones to fold secretory cargoes in addition to directing misfolded proteins to be refolded or degraded. Importantly, PDIs are emerging as key components of the proteostasis network, integrating protein folding status with central surveillance mechanisms to balance proteome stability according to cellular needs. Recent advances in the field driven by the generation of new mouse models, human genetic studies, and omics methodologies, in addition to interventions using small molecules and gene therapy, have revealed the significance of PDIs to the physiology of the nervous system. PDIs are also implicated in diverse pathologies, ranging from neurodevelopmental conditions to neurodegenerative diseases and traumatic injuries. Here, we review the principles of redox protein folding in the ER with a focus on current evidence linking genetic mutations and biochemical alterations to PDIs in the etiology of neurological conditions.
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9
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Ryan F, Khoshnam SE, Khodagholi F, Ashabi G, Ahmadiani A. How cytosolic compartments play safeguard functions against neuroinflammation and cell death in cerebral ischemia. Metab Brain Dis 2021; 36:1445-1467. [PMID: 34173922 DOI: 10.1007/s11011-021-00770-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 06/06/2021] [Indexed: 11/26/2022]
Abstract
Ischemic stroke is the second leading cause of mortality and disability globally. Neuronal damage following ischemic stroke is rapid and irreversible, and eventually results in neuronal death. In addition to activation of cell death signaling, neuroinflammation is also considered as another pathogenesis that can occur within hours after cerebral ischemia. Under physiological conditions, subcellular organelles play a substantial role in neuronal functionality and viability. However, their functions can be remarkably perturbed under neurological disorders, particularly cerebral ischemia. Therefore, their biochemical and structural response has a determining role in the sequel of neuronal cells and the progression of disease. However, their effects on cell death and neuroinflammation, as major underlying mechanisms of ischemic stroke, are still not understood. This review aims to provide a comprehensive overview of the contribution of each organelle on these pathological processes after ischemic stroke.
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Affiliation(s)
- Fari Ryan
- Centre for Research in Neuroscience, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Seyed Esmaeil Khoshnam
- Persian Gulf Physiology Research Centre, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ghorbangol Ashabi
- Department of Physiology, Faculty of Medicine, Tehran University of Medical Sciences, PO Box: 1417613151, Tehran, Iran.
| | - Abolhassan Ahmadiani
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Electroacupuncture Regulates Endoplasmic Reticulum Stress and Ameliorates Neuronal Injury in Rats with Acute Ischemic Stroke. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:9912325. [PMID: 34434247 PMCID: PMC8382524 DOI: 10.1155/2021/9912325] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 07/22/2021] [Accepted: 08/09/2021] [Indexed: 12/16/2022]
Abstract
Ischemic stroke is a common cause of morbidity, mortality, and disability worldwide. Electroacupuncture (EA) is an effective method for alleviating brain damage after ischemic stroke. However, the underlying mechanism has not been fully elucidated. This study aimed to determine whether endoplasmic reticulum stress (ERS) could contribute to the protective effects of EA in cerebral ischemia/reperfusion injury (CIRI) to provide a rationale for the widespread clinical use of EA. Rats were divided into the sham-operated (sham) group, the CIRI (model) group, and the EA group. Rats in the model group were subjected to middle cerebral artery occlusion (MCAO) for 2 h followed by 72 h of reperfusion. Rats with CIRI were treated daily with EA at GV20 and ST36 for a total of 3 days. The Longa scoring system and adhesive removal somatosensory test were applied to evaluate neurological deficits. Then, 2,3,5-triphenyltetrazolium chloride (TTC) staining was performed to measure the infarct volume. Immunofluorescence staining for NeuN and GFAP and terminal deoxynucleotidyl transferase- (TdT-) mediated dUTP nick-end labeling (TUNEL) staining were performed to detect apoptotic cells in brain tissue. Immunohistochemistry, quantitative real-time polymerase chain reaction (qPCR), and western blotting were used to measure the levels of ERS indicators (GRP78, CHOP/GADD153, p-eIF2α, and caspase 12). The results showed that EA significantly reduced the cerebral infarct volume, improved neurological function, and inhibited neuronal apoptosis. In the EA group compared with the model group, the mRNA expression levels of GRP78 were significantly increased, and the expression levels of proapoptotic proteins (CHOP/GADD153, p-eIF2α, and caspase 12) were significantly decreased. These results suggest that the possible mechanism by which EA protects cells against neuronal injury in CIRI may involve inhibiting endoplasmic reticulum stress.
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Emam AM, Saad MA, Ahmed NA, Zaki HF. Vortioxetine mitigates neuronal damage by restricting PERK/eIF2α/ATF4/CHOP signaling pathway in rats subjected to focal cerebral ischemia-reperfusion. Life Sci 2021; 283:119865. [PMID: 34358549 DOI: 10.1016/j.lfs.2021.119865] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/27/2021] [Accepted: 07/27/2021] [Indexed: 10/20/2022]
Abstract
AIMS Stroke has risen to the fifth and third most common causes of death in the United States and the rest of the world, respectively. Vortioxetine (VTX) is a multimodal antidepressant agent that balances 5-HT receptors and represses the serotonin transporter. Our study aimed to examine the neuroprotective impacts of VTX against cerebral ischemia caused by occluding the middle cerebral artery (MCA). MAIN METHODS Until the middle cerebral artery occlusion (MCAO) induction, VTX (10 mg/kg/day) was taken orally for 14 days. Behavioral assessments were carried out 24 h after the MCAO technique. The hippocampal and cortical tissues of the brain were isolated to assess the histological changes and the levels of the biochemical parameters. KEY FINDINGS MCAO damage led to severe neurological deficits and histopathological damage. However, VTX improved MCAO-induced neurological deficits and ameliorated histopathological changes in both hippocampal and cortical tissues of MCAO rats. Western blot analysis showed increments of p-PERK, CHOP, ASK-1, NICD, HES-1, HES-5, and p-eIF2α expression levels in MCAO rats. Moreover, ELISA revealed an increase in the levels of ATF4, IRE1, Apaf-1, and HIF-1α, while VTX administration ameliorated most of these perturbations induced after MCAO injury. SIGNIFICANCE This research suggests that VTX could be a potent neuroprotective agent against ischemic stroke by inhibiting a variety of oxidative, apoptotic, inflammatory, and endoplasmic reticulum stress pathways.
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Affiliation(s)
- Amr M Emam
- Department of Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology (MUST), 6th of October City, Giza, Egypt.
| | - Muhammad A Saad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt; School of Pharmacy, New Giza University, Giza, Egypt
| | - Naglaa A Ahmed
- Department of Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology (MUST), 6th of October City, Giza, Egypt
| | - Hala F Zaki
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, Egypt
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Wu S, Du L. Protein Aggregation in the Pathogenesis of Ischemic Stroke. Cell Mol Neurobiol 2021; 41:1183-1194. [PMID: 32529541 DOI: 10.1007/s10571-020-00899-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/05/2020] [Indexed: 01/31/2023]
Abstract
Despite the distinction between ischemic stroke and neurodegenerative disorders, they share numerous pathophysiologies particularly those mediated by inflammation and oxidative stress. Although protein aggregation is considered to be a hallmark of neurodegenerative diseases, the formation of protein aggregates can be also induced within a short time after cerebral ischemia, aggravating cerebral ischemic injury. Protein aggregation uncovers a previously unappreciated molecular overlap between neurodegenerative diseases and ischemic stroke. Unfortunately, compared with neurodegenerative disease, mechanism of protein aggregation after cerebral ischemia and how this can be averted remain unclear. This review highlights current understanding on protein aggregation and its intrinsic role in ischemic stroke.
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Affiliation(s)
- Shusheng Wu
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China.
| | - Longfei Du
- Department of Laboratory Medicine, Affiliated Hospital of Yangzhou University, Yangzhou, Jiangsu, China
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Hong Z, Minghua W, Bo N, Chaoyue Y, Haiyang Y, Haiqing Y, Chunyu X, Yan Z, Yuan Y. Rosmarinic acid attenuates acrylamide induced apoptosis of BRL-3A cells by inhibiting oxidative stress and endoplasmic reticulum stress. Food Chem Toxicol 2021; 151:112156. [PMID: 33781805 DOI: 10.1016/j.fct.2021.112156] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/16/2021] [Accepted: 03/20/2021] [Indexed: 12/20/2022]
Abstract
Acrylamide (AA) is a common endogenous contaminant in food, with a complex toxicity mechanism. The study on liver damage to experimental animals caused by AA has aroused a great attention. Rosmarinic acid (RosA) as a natural antioxidant shows excellent protective effects against AA-induced hepatotoxicity, but the potential mechanism is still unclear. In the current study, the protective effect of RosA on BRL-3A cell damage induced by AA was explored. RosA increased the activity of SOD and GSH, reduced the content of ROS and MDA, and significantly reduced the oxidative stress (OS) damage of BRL-3A cells induced by AA. RosA pretreatment inhibited the MAPK signaling pathway activated by AA, and down-regulated the phosphorylation of JNK, ERK and p38. RosA pretreatment also reduced the production of calcium ions caused by AA. In addition, the key proteins p-IRE1α, XBP-1s, TRAF2 of the IRE1 pathway, and the expression of endoplasmic reticulum stress (ERS) characteristic proteins GRP78, p-ASK1, Caspase-12 and CHOP were also down-regulated by RosA. NAC blocked the activation of the MAPK signaling pathway and inhibited the ERS pathway. RosA reduced the rate of apoptosis and down-regulated the expression of Bax/Bcl-2 and Caspase-3, thereby inhibiting AA-induced apoptosis. In conclusion, RosA reduced the OS and ERS induced by AA in BRL-3A cells, thereby inhibiting cell apoptosis, and it could be used as a potential protective agent against AA toxicity.
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Affiliation(s)
- Zhuang Hong
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Wang Minghua
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Nan Bo
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Yang Chaoyue
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Yan Haiyang
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Ye Haiqing
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Xi Chunyu
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Zhang Yan
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Yuan Yuan
- College of Food Science and Engineering, Jilin University, Changchun, 130062, China.
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He J, Chen Z, Kang X, Wu L, Jiang JM, Liu SM, Wei HJ, Chen YJ, Zou W, Wang CY, Zhang P. SIRT1 Mediates H 2S-Ameliorated Diabetes-Associated Cognitive Dysfunction in Rats: Possible Involvement of Inhibiting Hippocampal Endoplasmic Reticulum Stress and Synaptic Dysfunction. Neurochem Res 2021; 46:611-623. [PMID: 33534060 DOI: 10.1007/s11064-020-03196-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 12/01/2020] [Accepted: 12/04/2020] [Indexed: 12/27/2022]
Abstract
Diabetes-associated cognitive dysfunction (DACD) characterized by hippocampal injury increases the risk of major cerebrovascular events and death. Endoplasmic reticulum (ER) stress and synaptic dysfunction play vital roles in the pathological process. At present, no specific treatment exists for the prevention and/or the therapy of DACD. We have recently reported that hydrogen sulfide (H2S) exhibits therapeutic potential for DACD, but the underlying mechanism has not been fully elucidated. Silent information regulator 1 (SIRT1) has been shown to play a role in regulating the progression of diabetes and is also indispensable for memory formation and cognitive performance. Hence, the present study was performed to explore whether SIRT1 mediates the protective effect of H2S on streptozotocin (STZ)-induced cognitive deficits, an in vivo rat model of DACD, via inhibiting hippocampal ER stress and synaptic dysfunction. The results showed that administration of NaHS (an exogenous H2S donor) increased the expression of SIRT1 in the hippocampus of STZ-induced diabetic rats. Then, results proved that sirtinol, a special blocker of SIRT1, abrogated the inhibition of NaHS on STZ-induced cognitive deficits, as appraised by Morris water maze test, Y-maze test, and Novel object recognition behavioral test. In addition, administration of NaHS eliminated STZ-induced ER stress as evidenced by the decreases in the expressions of ER stress-related proteins including glucose-regulated protein 78, C/EBP homologous protein, and cleaved caspase-12 in the hippocampus, while these effects of NaHS were also reverted by sirtinol. Furthermore, the NaHS-induced up-regulation of hippocampal synapse-related protein (synapsin-1, SYN1) expression in STZ-induced diabetic rats was also abolished by sirtinol. Taken together, these results demonstrated that SIRT1 mediates the protection of H2S against cognitive dysfunction in STZ-diabetic rats partly via inhibiting hippocampal ER stress and synaptic dysfunction.
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Affiliation(s)
- Juan He
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336, Dongfeng South Road, Hengyang, 421001, Hunan, People's Republic of China
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
| | - Zhuo Chen
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336, Dongfeng South Road, Hengyang, 421001, Hunan, People's Republic of China
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
- Department of Neurology, Yiyang Center Hospital, Yiyang, 413000, Hunan, People's Republic of China
| | - Xuan Kang
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
- Department of Neurology, the First Affiliated Hospital, University of South China, No. 69 Chuanshan Road, Hengyang, 421001, Hunan, People's Republic of China
| | - Lin Wu
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336, Dongfeng South Road, Hengyang, 421001, Hunan, People's Republic of China
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
| | - Jia-Mei Jiang
- Department of Neurology, the First Affiliated Hospital, University of South China, No. 69 Chuanshan Road, Hengyang, 421001, Hunan, People's Republic of China.
| | - Su-Mei Liu
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336, Dongfeng South Road, Hengyang, 421001, Hunan, People's Republic of China
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
| | - Hai-Jun Wei
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
- Department of Neurology, the First Affiliated Hospital, University of South China, No. 69 Chuanshan Road, Hengyang, 421001, Hunan, People's Republic of China
| | - Yong-Jun Chen
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336, Dongfeng South Road, Hengyang, 421001, Hunan, People's Republic of China
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
| | - Wei Zou
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336, Dongfeng South Road, Hengyang, 421001, Hunan, People's Republic of China
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
| | - Chun-Yan Wang
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China
| | - Ping Zhang
- Department of Neurology, Affiliated Nanhua Hospital, University of South China, No. 336, Dongfeng South Road, Hengyang, 421001, Hunan, People's Republic of China.
- Institute of Neuroscience, Hengyang Medical College, University of South China, Hengyang, 421001, Hunan, People's Republic of China.
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Participation of Amyloid and Tau Protein in Post-Ischemic Neurodegeneration of the Hippocampus of a Nature Identical to Alzheimer's Disease. Int J Mol Sci 2021; 22:ijms22052460. [PMID: 33671097 PMCID: PMC7957532 DOI: 10.3390/ijms22052460] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/20/2021] [Accepted: 02/23/2021] [Indexed: 02/05/2023] Open
Abstract
Recent evidence suggests that amyloid and tau protein are of vital importance in post-ischemic death of CA1 pyramidal neurons of the hippocampus. In this review, we summarize protein alterations associated with Alzheimer's disease and their gene expression (amyloid protein precursor and tau protein) after cerebral ischemia, as well as their roles in post-ischemic hippocampus neurodegeneration. In recent years, multiple studies aimed to elucidate the post-ischemic processes in the development of hippocampus neurodegeneration. Their findings have revealed the dysregulation of genes for amyloid protein precursor, β-secretase, presenilin 1 and 2, tau protein, autophagy, mitophagy, and apoptosis identical in nature to Alzheimer's disease. Herein, we present the latest data showing that amyloid and tau protein associated with Alzheimer's disease and their genes play a key role in post-ischemic neurodegeneration of the hippocampus with subsequent development of dementia. Therefore, understanding the underlying process for the development of post-ischemic CA1 area neurodegeneration in the hippocampus in conjunction with Alzheimer's disease-related proteins and genes will provide the most important therapeutic development goals to date.
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Kumar V, Maity S. ER Stress-Sensor Proteins and ER-Mitochondrial Crosstalk-Signaling Beyond (ER) Stress Response. Biomolecules 2021; 11:173. [PMID: 33525374 PMCID: PMC7911976 DOI: 10.3390/biom11020173] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/14/2021] [Accepted: 01/19/2021] [Indexed: 02/07/2023] Open
Abstract
Recent studies undoubtedly show the importance of inter organellar connections to maintain cellular homeostasis. In normal physiological conditions or in the presence of cellular and environmental stress, each organelle responds alone or in coordination to maintain cellular function. The Endoplasmic reticulum (ER) and mitochondria are two important organelles with very specialized structural and functional properties. These two organelles are physically connected through very specialized proteins in the region called the mitochondria-associated ER membrane (MAM). The molecular foundation of this relationship is complex and involves not only ion homeostasis through the shuttling of calcium but also many structural and apoptotic proteins. IRE1alpha and PERK are known for their canonical function as an ER stress sensor controlling unfolded protein response during ER stress. The presence of these transmembrane proteins at the MAM indicates its potential involvement in other biological functions beyond ER stress signaling. Many recent studies have now focused on the non-canonical function of these sensors. In this review, we will focus on ER mitochondrial interdependence with special emphasis on the non-canonical role of ER stress sensors beyond ER stress.
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Xin D, Quan R, Zeng L, Xu C, Tang Y. Lipoxin A4 protects rat skin flaps against ischemia-reperfusion injury through inhibiting cell apoptosis and inflammatory response induced by endoplasmic reticulum stress. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:1086. [PMID: 33145305 PMCID: PMC7575949 DOI: 10.21037/atm-20-5549] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Background The ischemia-reperfusion (I/R) injury of skin flap is a complex pathophysiological process involving many cells and factors. Although endoplasmic reticulum (ER) stress-induced cell apoptosis and inflammatory response are of immense importance in the skin flap ischemia, the treatment for I/R injury induced by ER stress is barely reported. Methods Healthy male Wister rats were randomly divided into three groups: sham-operated group, I/R model group and I/R + LXA4 group. I/R-induced injury in skin flaps with or without pre-treatment of Lipoxin A4 (LXA4, 100 µg/kg) was tested by using HE and TUNEL staining. Related factors associated with oxidative stress, apoptosis, inflammatory response, and ER stress were tested by ELISA, biochemical assay, and western blotting, respectively. Results Our results showed that LXA4 treatment significantly promotes skin flap survival and attenuates I/R injury by inhibiting oxidative stress, apoptosis, and inflammatory factor release, evidenced by the decreased expression of malondialdehyde (MDA), lactate dehydrogenase (LDH), NF-κBp65, tumor necrosis factor α (TNF-α), ET, active Caspase-3 and Bax and up-regulated superoxide dismutase (SOD), glutathione (GSH) level and Bcl-2 expression. Moreover, LXA4 treatment also reverses the increased expression of GRP78, p-PERK, p-eIF2α, ATF4, and CHOP induced by I/R injury. Conclusions In conclusion, we showed that ER stress causes cell apoptosis and inflammatory response, resulting in the skin flaps injury. LXA4 exhibits a protective effect on skin flaps against I/R injury through the inhibition of ER stress.
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Affiliation(s)
- Dawei Xin
- Department of Orthopedics, Xiaoshan Traditional Chinese Medical Hospital, Hangzhou, China
| | - Renfu Quan
- Department of Orthopedics, Xiaoshan Traditional Chinese Medical Hospital, Hangzhou, China
| | - Linru Zeng
- Department of Orthopedics, Xiaoshan Traditional Chinese Medical Hospital, Hangzhou, China
| | - Canda Xu
- Department of Orthopedics, Xiaoshan Traditional Chinese Medical Hospital, Hangzhou, China
| | - Yanghua Tang
- Department of Orthopedics, Xiaoshan Traditional Chinese Medical Hospital, Hangzhou, China
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Nakano Y, Shimoda M, Okudomi S, Kawaraya S, Kawahara M, Tanaka KI. Seleno-l-methionine suppresses copper-enhanced zinc-induced neuronal cell death via induction of glutathione peroxidase. Metallomics 2020; 12:1693-1701. [PMID: 32926024 DOI: 10.1039/d0mt00136h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Excessive zinc ion (Zn2+) release is induced in pathological situations and causes neuronal cell death. Previously, we have reported that copper ions (Cu2+) markedly exacerbated Zn2+-induced neuronal cell death by potentiating oxidative stress, the endoplasmic reticulum (ER) stress response, and the activation of the c-Jun amino-terminal kinase (JNK) signaling pathway. In contrast, selenium (Se), an essential trace element, and amino acids containing selenium (such as seleno-l-methionine) have been reported to inhibit stress-induced neuronal cell death and oxidative stress. Thus, we investigated the effect of seleno-l-methionine on Cu2+/Zn2+-induced neuronal cell death in GT1-7 cells. Seleno-l-methionine treatment clearly restored the Cu2+/Zn2+-induced decrease in the viable cell number and attenuated the Cu2+/Zn2+-induced cytotoxicity. Accordingly, the levels of ER stress-related factors (especially, CHOP and GADD34) and of phosphorylated JNK increased upon CuCl2 and ZnCl2 co-treatment, whereas pre-treatment with seleno-l-methionine significantly suppressed these upregulations. Analysis of reactive oxygen species (ROS) as upstream factors of these pathways revealed that Cu2+/Zn2+-induced ROS production was clearly suppressed by seleno-l-methionine treatment. Finally, we found that seleno-l-methionine induced the antioxidative protein, glutathione peroxidase. Taken together, our findings suggest that seleno-l-methionine suppresses Cu2+/Zn2+-induced neuronal cell death and oxidative stress via induction of glutathione peroxidase. Thus, we think that seleno-l-methionine may help prevent refractory neurological diseases.
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Affiliation(s)
- Yukari Nakano
- Department of Bio-Analytical Chemistry, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan.
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Activating Transcription Factor 6 Contributes to Functional Recovery After Spinal Cord Injury in Adult Zebrafish. J Mol Neurosci 2020; 71:734-745. [PMID: 32895880 DOI: 10.1007/s12031-020-01691-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 08/21/2020] [Indexed: 12/12/2022]
Abstract
Spinal cord injury (SCI) is one of the most common devastating injuries, with little possibility of recovery in humans. However, zebrafish efficiently regenerate functional nervous system tissue after SCI. Therefore, the spinal cord transection model of adult zebrafish was applied to explore the role of ATF6 in neuro-recovery. Activating transcription factor 6 (ATF6) is a type-II transmembrane protein in the endoplasmic reticulum (ER). ATF6 target genes could improve ER homeostasis, which contributes to cytoprotection. Herein, we found that the ATF6 level increased at 12 h and 3 days post SCI, and returned to sham levels at 7 days post SCI. ATF6-expressing motor neurons were present in the central canal of the spinal cord and increased at 12 h post SCI. ATF6 morpholino treatment showed that inhibition of ATF6 delayed locomotor recovery and hindered neuron axon regrowth in SCI zebrafish. Furthermore, we investigated the role of both binding immunoglobulin protein (Bip) and C/EBP homologous transcription factor protein (CHOP), the two target genes of ATF6. We found that Bip expression significantly increased in the spinal cord at 7 days after SCI, which served as a pro-survival chaperone. Our results also showed that CHOP expression significantly decreased in the spinal cord at 7 days after SCI, which was identified as a protein involved in apoptosis. Taken together, our data demonstrate that ATF6 may contribute to the functional recovery after SCI in adult zebrafish, via up-regulation of Bip and down-regulation of CHOP to restore the homeostasis of ER.
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Effect of Heavy Ion 12C 6+ Radiation on Lipid Constitution in the Rat Brain. Molecules 2020; 25:molecules25163762. [PMID: 32824857 PMCID: PMC7465761 DOI: 10.3390/molecules25163762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 11/20/2022] Open
Abstract
Heavy ions refer to charged particles with a mass greater than four (i.e., alpha particles). The heavy ion irradiation used in radiotherapy or that astronauts suffer in space flight missions induces toxicity in normal tissue and leads to short-term and long-term damage in both the structure and function of the brain. However, the underlying molecular alterations caused by heavy ion radiation have yet to be completely elucidated. Herein, untargeted and targeted lipidomic profiling of the whole brain tissue and blood plasma 7 days after the administration of the 15 Gy (260 MeV, low linear energy (LET) = 13.9 KeV/μm) plateau irradiation of disposable 12C6+ heavy ions on the whole heads of rats was explored to study the lipid damage induced by heavy ion radiation in the rat brain using ultra performance liquid chromatography-mass spectrometry (UPLC–MS) technology. Combined with multivariate variables and univariate data analysis methods, our results indicated that an orthogonal partial least squares discriminant analysis (OPLS–DA) could clearly distinguish lipid metabolites between the irradiated and control groups. Through the combination of variable weight value (VIP), variation multiple (FC), and differential (p) analyses, the significant differential lipids diacylglycerols (DAGs) were screened out. Further quantitative targeted lipidomic analyses of these DAGs in the rat brain tissue and plasma supported the notion that DAG 47:1 could be used as a potential biomarker to study brain injury induced by heavy ion irradiation.
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Valproic Acid: A Potential Therapeutic for Spinal Cord Injury. Cell Mol Neurobiol 2020; 41:1441-1452. [DOI: 10.1007/s10571-020-00929-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 07/20/2020] [Indexed: 02/06/2023]
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Zhong H, Yu H, Chen J, Sun J, Guo L, Huang P, Zhong Y. Hydrogen Sulfide and Endoplasmic Reticulum Stress: A Potential Therapeutic Target for Central Nervous System Degeneration Diseases. Front Pharmacol 2020; 11:702. [PMID: 32477150 PMCID: PMC7240010 DOI: 10.3389/fphar.2020.00702] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 04/29/2020] [Indexed: 12/15/2022] Open
Abstract
There are three members of the endogenous gas transmitter family. The first two are nitric oxide and carbon monoxide, and the third newly added member is hydrogen sulfide (H2S). They all have similar functions: relaxing blood vessels, smoothing muscles, and getting involved in the regulation of neuronal excitation, learning, and memory. The cystathionine β-synthase (CBS), 3-mercaptopyruvate sulfur transferase acts together with cysteine aminotransferase (3-MST/CAT), cystathionine γ-lyase (CSE), and 3-mercaptopyruvate sulfur transferase with D-amino acid oxidase (3-MST/DAO) pathways are involved in the enzymatic production of H2S. More and more researches focus on the role of H2S in the central nervous system (CNS), and H2S plays a significant function in neuroprotection processes, regulating the function of the nervous system as a signaling molecule in the CNS. Endoplasmic reticulum stress (ERS) and protein misfolding in its mechanism are related to neurodegenerative diseases. H2S exhibits a wide variety of cytoprotective and physiological functions in the CNS degenerative diseases by regulating ERS. This review summarized on the neuroprotective effect of H2S for ERS played in several CNS diseases including Alzheimer’s disease, Parkinson’s disease, and depression disorder, and discussed the corresponding possible signaling pathways or mechanisms as well.
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Affiliation(s)
- Huimin Zhong
- Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Ophthalmology, Ruijin Hospital Affiliated Medical School, Shanghai Jiaotong University, Shanghai, China
| | - Huan Yu
- Department of Ophthalmology, Ruijin Hospital Affiliated Medical School, Shanghai Jiaotong University, Shanghai, China
| | - Junjue Chen
- Department of Ophthalmology, Ruijin Hospital Affiliated Medical School, Shanghai Jiaotong University, Shanghai, China
| | - Jun Sun
- Department of Ophthalmology, Ruijin Hospital Affiliated Medical School, Shanghai Jiaotong University, Shanghai, China
| | - Lei Guo
- Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ping Huang
- Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Ophthalmology, Ruijin Hospital Affiliated Medical School, Shanghai Jiaotong University, Shanghai, China
| | - Yisheng Zhong
- Department of Ophthalmology, Ruijin Hospital Affiliated Medical School, Shanghai Jiaotong University, Shanghai, China
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Wang K, Lou Y, Xu H, Zhong X, Huang Z. Harpagide from Scrophularia protects rat cortical neurons from oxygen-glucose deprivation and reoxygenation-induced injury by decreasing endoplasmic reticulum stress. JOURNAL OF ETHNOPHARMACOLOGY 2020; 253:112614. [PMID: 32007630 DOI: 10.1016/j.jep.2020.112614] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 01/22/2020] [Accepted: 01/22/2020] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Harpagide is the main ingredient in Scrophularia ningpoensis Hemsl which is used for the therapeutic purpose of treating encephalopathy. Harpagide has shown promise in the treatment of oxygen-glucose deprivation and reoxygenation (OGD/R)-induced brain injury. However, the underlying mechanisms remain unclear. AIM OF STUDY In this study, we aimed to determine the neuroprotective effect of harpagide on rat cortical neurons under OGD/R conditions that induce the development of ischaemia-reperfusion (I/R). MATERIALS AND METHODS To explore the biological function of harpagide in cerebral ischaemia-reperfusion injury (CIRI), The CIRI model was established by oxygen-glucose deprivation and reoxygenation (OGD/R) on rat cortical neurons. It tested cell survival rate by 3-(4,5-dimethylthiazol-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) assay, apoptosis by flow cytometry, intracellular Ca2+ concentration [Ca2+] i by cofocal laser, and expressions related to endoplasmic reticulum stress (ERS) by RT-PCR and Western blot. RESULTS We found that pretreatment with harpagide (50 μM) prevented OGD/R-induced apoptotic cell death. Harpagide also significantly decreased the gene expression levels and protein production of ERS-related proteins. We found that harpagide also exerted a neuroprotective effect on TG-induced apoptosis in rat cortical neurons and decreased the gene expression levels and protein production of GRP78, caspase-12 and CHOP. We also measured the intracellular calcium ion concentration ([Ca2+]i) in neurons and found that harpagide significantly decreased the [Ca2+]i induced by OGD/R and TG. CONCLUSION These results suggest that harpagide protects against OGD/R-induced cell apoptosis, likely by decreasing ERS. Collectively, harpagide was demonstrated to be a prominent suppressor of ERS and prevented the apoptosis of rat cortical neurons. Based on the results, harpagide could potentially serve as a therapeutic agent of ischaemia-like injury associated with excessive ERS and apoptosis.
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Affiliation(s)
- Ke Wang
- Medical College, Jiaxing University, Jiaxing, 314001, China.
| | - Yeliang Lou
- Institute of Traditional She Medicine, Department of Pharmacy, Lishui People's Hospital, Lishui, 323000, China.
| | - Huang Xu
- Medical College, Jiaxing University, Jiaxing, 314001, China.
| | - Xiaoming Zhong
- College of Pharmacy, Zhe Jiang Chinese Medical University, Hangzhou, 310053, China.
| | - Zhen Huang
- College of Pharmacy, Zhe Jiang Chinese Medical University, Hangzhou, 310053, China.
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24
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Zhu S, Chen M, Chen M, Ye J, Ying Y, Wu Q, Dou H, Bai L, Mao F, Ni W, Yu K. Fibroblast Growth Factor 22 Inhibits ER Stress-Induced Apoptosis and Improves Recovery of Spinal Cord Injury. Front Pharmacol 2020; 11:18. [PMID: 32116697 PMCID: PMC7026669 DOI: 10.3389/fphar.2020.00018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 01/07/2020] [Indexed: 12/12/2022] Open
Abstract
Currently, inhibiting or reducing neuronal cell death is the main strategy to improve recovery of spinal cord injury (SCI). Therapies using nerve growth factors to treat SCI mainly focused on reducing the area damaged by postinjury degeneration to promote functional recovery. In this report, we investigated the mechanism of ER (endoplasmic reticulum) stress-induced apoptosis and the protective action of fibroblast growth factor 22 (FGF22) in vivo. Our results demonstrated that ER stress-induced apoptosis plays a significant role in injury of SCI model rats. FGF22 administration promoted recovery and increased neuron survival in the spinal cord lesions of model mice. The protective effect of FGF22 is related to decreased expression of CHOP (C/EBP-homologous protein), GRP78 (glucose-regulated protein 78), caspase-12, X-box binding protein 1 (XBP1), eukaryotic initiation factor 2α (Eif-2α) and Bad which are ER stress-induced apoptosis response proteins. Moreover, FGF22 administration also increased the number of neurons and the expression of growth-associated protein 43 (GAP43) which was related to axon regeneration. We also demonstrated that the protective effect of FGF22 effectively reduces neuronal apoptosis and promotes axonal regeneration. Our study first illustrated that the function of FGF22 is related to the inhibition of ER stress-induced cell death in SCI recovery via activation of downstream signals. This study also suggested a new tendency of FGF22 therapy development in central neural system injuries, which involved chronic ER stress-induced apoptosis.
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Affiliation(s)
- Sipin Zhu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Mengji Chen
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Second Medical College of Wenzhou Medical University, Wenzhou, China
| | - Min Chen
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Second Medical College of Wenzhou Medical University, Wenzhou, China
| | - Jiahui Ye
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Second Medical College of Wenzhou Medical University, Wenzhou, China
| | - Yibo Ying
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Second Medical College of Wenzhou Medical University, Wenzhou, China
| | - Qiuji Wu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Second Medical College of Wenzhou Medical University, Wenzhou, China
| | - Haicheng Dou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Liyunian Bai
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,Second Medical College of Wenzhou Medical University, Wenzhou, China
| | - Fangmin Mao
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Wenfei Ni
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Kehe Yu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
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25
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Yang Y, Zhou Q, Gao A, Chen L, Li L. Endoplasmic reticulum stress and focused drug discovery in cardiovascular disease. Clin Chim Acta 2020; 504:125-137. [PMID: 32017925 DOI: 10.1016/j.cca.2020.01.031] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 01/29/2020] [Accepted: 01/29/2020] [Indexed: 12/28/2022]
Abstract
Endoplasmic reticulum (ER) is an intracellular membranous organelle involved in the synthesis, folding, maturation and post-translation modification of secretory and transmembrane proteins. Therefore, ER is closely related to the maintenance of intracellular homeostasis and the good balance between health and diseases. Endoplasmic reticulum stress (ERS) occurs when unfolded/misfolded proteins accumulate after disturbance of ER environment. In response to ERS, cells trigger an adaptive response called the Unfolded protein response (UPR), which helps cells cope with the stress. In recent years, a large number of studies show that ERS can aggravate cardiovascular diseases. ERS-related proteins expression in cardiovascular diseases is on the rise. Therefore, down-regulation of ERS is critical for alleviating symptoms of cardiovascular diseases, which may be used in the near future to treat cardiovascular diseases. This article reviews the relationship between ERS and cardiovascular diseases and drugs that inhibit ERS. Furthermore, we detail the role of ERS inhibitors in the treatment of cardiovascular disease. Drugs that inhibit ERS are considered as promising strategies for the treatment of cardiovascular diseases.
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Affiliation(s)
- Yiyuan Yang
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China
| | - Qionglin Zhou
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China
| | - Anbo Gao
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China
| | - Linxi Chen
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China.
| | - Lanfang Li
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang 421001, China.
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26
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Doycheva D, Xu N, Kaur H, Malaguit J, McBride DW, Tang J, Zhang JH. Adenoviral TMBIM6 vector attenuates ER-stress-induced apoptosis in a neonatal hypoxic-ischemic rat model. Dis Model Mech 2019; 12:dmm040352. [PMID: 31636086 PMCID: PMC6898997 DOI: 10.1242/dmm.040352] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 10/14/2019] [Indexed: 12/31/2022] Open
Abstract
Endoplasmic reticulum (ER) stress is a major pathology encountered after hypoxic-ischemic (HI) injury. Accumulation of unfolded proteins triggers the unfolded protein response (UPR), resulting in the activation of pro-apoptotic cascades that lead to cell death. Here, we identified Bax inhibitor 1 (BI-1), an evolutionarily conserved protein encoded by the transmembrane BAX inhibitor motif-containing 6 (TMBIM6) gene, as a novel modulator of ER-stress-induced apoptosis after HI brain injury in a neonatal rat pup. The main objective of our study was to overexpress BI-1, via viral-mediated gene delivery of human adenoviral-TMBIM6 (Ad-TMBIM6) vector, to investigate its anti-apoptotic effects as well as to elucidate its signaling pathways in an in vivo neonatal HI rat model and in vitro oxygen-glucose deprivation (OGD) model. Ten-day-old unsexed Sprague Dawley rat pups underwent right common carotid artery ligation followed by 1.5 h of hypoxia. Rat pups injected with Ad-TMBIM6 vector, 48 h pre-HI, showed a reduction in relative infarcted area size, attenuated neuronal degeneration and improved long-term neurological outcomes. Furthermore, silencing of BI-1 or further activating the IRE1α branch of the UPR, using a CRISPR activation plasmid, was shown to reverse the protective effects of BI-1. Based on our in vivo and in vitro data, the protective effects of BI-1 are mediated via inhibition of IRE1α signaling and in part via inhibition of the second stress sensor receptor, PERK. Overall, this study showed a novel role for BI-1 and ER stress in the pathophysiology of HI and could provide a basis for BI-1 as a potential therapeutic target.
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Affiliation(s)
- Desislava Doycheva
- Center for Neuroscience Research, Department of Physiology and Pharmacology, Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
| | - Ningbo Xu
- Center for Neuroscience Research, Department of Physiology and Pharmacology, Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
- Department of Interventional Radiology, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Harpreet Kaur
- Center for Neuroscience Research, Department of Physiology and Pharmacology, Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
| | - Jay Malaguit
- Center for Neuroscience Research, Department of Physiology and Pharmacology, Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
| | - Devin William McBride
- The Vivian L. Smith Department of Neurosurgery, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Jiping Tang
- Center for Neuroscience Research, Department of Physiology and Pharmacology, Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
| | - John H Zhang
- Center for Neuroscience Research, Department of Physiology and Pharmacology, Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
- Departments of Anesthesiology, Neurosurgery and Neurology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
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27
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Chen Y, Zhang L, Gong X, Gong H, Cheng R, Qiu F, Zhong X, Huang Z. Iridoid glycosides from Radix Scrophulariae attenuates focal cerebral ischemia‑reperfusion injury via inhibiting endoplasmic reticulum stress‑mediated neuronal apoptosis in rats. Mol Med Rep 2019; 21:131-140. [PMID: 31746404 PMCID: PMC6896402 DOI: 10.3892/mmr.2019.10833] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 09/24/2019] [Indexed: 12/12/2022] Open
Abstract
Iridoid glycosides of Radix Scrophulariae (IGRS) are a group of the major bioactive components from Radix Scrophulariae with extensive pharmacological activities. The present study investigated the effects of IGRS on cerebral ischemia‑reperfusion injury (CIRI) and explored its potential mechanisms of action. A CIRI model in rats was established by occlusion of the right middle cerebral artery for 90 min, followed by 24 h of reperfusion. Prior to surgery, 30, 60 or 120 mg/kg IGRS was administered to the rats once a day for 7 days. Then, the neurological scores, brain edema and volume of the cerebral infarction were measured. The apoptosis index was determined by terminal deoxynucleotidyl transferase mediated dUTP nick end labeling. The effects of IGRS on the histopathology of the cortex in brain tissues and the endoplasmic reticulum ultrastructure in the hippocampus were analyzed. Finally, the expression of endoplasmic reticulum stress (ERS)‑regulating mediators, endoplasmic reticulum chaperone BiP (GRP78), DNA damage‑inducible transcript 3 protein (CHOP) and caspase‑12, were detected by reverse transcription quantitative polymerase chain reaction (RT‑qPCR) and western blot analysis. The volume of cerebral infarction and brain water content in the IGRS‑treated groups treated at doses of 60 and 120 mg/kg were decreased significantly compared with the Model group. The neurological scores were also significantly decreased in the IGRS‑treated groups. IGRS treatment effectively decreased neuronal apoptosis resulting from CIRI‑induced neuron injury. In addition, the histopathological damage and the endoplasmic reticulum ultrastructure injury were partially improved in CIRI rats following IGRS treatment. RT‑qPCR and western blot analysis data indicated that IGRS significantly decreased the expression levels of GRP78, CHOP and caspase‑12 at both mRNA and protein levels. The results of the present study demonstrated that IGRS exerted a protective effect against CIRI in brain tissue via the inhibition of apoptosis and ERS.
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Affiliation(s)
- Yanyue Chen
- Institute of Traditional Chinese Medicine Resources, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P.R. China
| | - Lei Zhang
- Institute of Traditional Chinese Medicine Resources, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P.R. China
| | - Xueyuan Gong
- Institute of Traditional Chinese Medicine Resources, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P.R. China
| | - Hengpei Gong
- Institute of Traditional Chinese Medicine Resources, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P.R. China
| | - Rubin Cheng
- Institute of Traditional Chinese Medicine Resources, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P.R. China
| | - Fengmei Qiu
- Institute of Traditional Chinese Medicine Resources, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P.R. China
| | - Xiaoming Zhong
- Institute of Traditional Chinese Medicine Resources, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P.R. China
| | - Zhen Huang
- Institute of Traditional Chinese Medicine Resources, College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 311400, P.R. China
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28
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The PERK Pathway Plays a Neuroprotective Role During the Early Phase of Secondary Brain Injury Induced by Experimental Intracerebral Hemorrhage. ACTA NEUROCHIRURGICA. SUPPLEMENT 2019; 127:105-119. [PMID: 31407071 DOI: 10.1007/978-3-030-04615-6_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
The protein kinase RNA-like endoplasmic reticulum kinase (PERK) pathway, which is a branch of the unfolded protein response, participates in a range of pathophysiological processes of neurological diseases. However, few studies have investigated the role of the PERK in intracerebral hemorrhage (ICH). The present study evaluated the role of the PERK pathway during the early phase of ICH-induced secondary brain injury (SBI) and its potential mechanisms. An autologous whole blood ICH model was established in rats, and cultured primary cortical neurons were treated with oxyhemoglobin to mimic ICH in vitro. We found that levels of phosphorylated alpha subunit of eukaryotic translation initiation factor 2 (p-eIF2α) and activating transcription factor 4 (ATF4) increased significantly and peaked at 12 h during the early phase of the ICH. To further elucidate the role of the PERK pathway, we assessed the effects of the PERK inhibitor, GSK2606414, and the eIF2α dephosphorylation antagonist, salubrinal, at 12 h after ICH both in vivo and in vitro. Inhibition of PERK with GSK2606414 suppressed the protein levels of p-eIF2α and ATF4, resulting in increase of transcriptional activator CCAAT/enhancer-binding protein homologous protein (CHOP) and caspase-12, which promoted apoptosis and reduced neuronal survival. Treatment with salubrinal yielded opposite results, which suggested that activation of the PERK pathway could promote neuronal survival and reduce apoptosis. In conclusion, the present study has demonstrated the neuroprotective effects of the PERK pathway during the early phase of ICH-induced SBI. These findings highlight the potential value of PERK pathway as a therapeutic target for ICH.
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29
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Zhao M, Chen Q, Xu W, Wang H, Che Y, Wu M, Wang L, Lijuan C, Hao H. Total ginsenosides extract induce autophagic cell death in NSCLC cells through activation of endoplasmic reticulum stress. JOURNAL OF ETHNOPHARMACOLOGY 2019; 243:112093. [PMID: 31325602 DOI: 10.1016/j.jep.2019.112093] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/14/2019] [Accepted: 07/14/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ginseng (Panax ginseng C. A. Mey) has been widely used in Asian countries for thousands of years. It has auxiliary anticancer efficacy and its derived preparations (e.g. Shenmai injection) are prescribed for cancer patients as Traditional Chinese Medicines clinically in China. AIM OF THE STUDY The involved adjuvant anticancer mechanisms of ginseng are still unknown. The present study evaluated the anti-cancer effect of total ginsenosides extract (TGS) and determined the anticancer mechanisms of TGS-induced cell death in human non-small cell lung cancer (NSCLC) cells. MATERIALS AND METHODS The anti-cancer effect of TGS was evaluated in NSCLC by cell proliferation assay. The autophagy flux induction of TGS were tested and validated by Western blot, immunofluorescence and transmission electron microscope. The mechanisms of TGS in inducing autophagic cell death were validated by Western blot, gene knockdown and quantitative real time PCR assay. RESULTS We found TGS could induce cell death in concentration and time dependent manners, and the cell morphology of NSCLC changed from cobblestone shape to elongated spindle shape after treated with TGS. In the study of cell autophagy, we confirm that TGS could upregulate autophagy flux and induce autophagic cell death through activation endoplasmic reticulum stress. Further investigations demonstrated this process was mediated by the ATF4-CHOP-AKT1-mTOR axis in NSCLC cells. CONCLUSION Our findings suggested that TGS could induce autophagic cell death in NSCLC cells through activation of endoplasmic reticulum stress, disclosing another characteristic of TGS-induced cell death and a novel mechanism of TGS and its derived preparations in clinical treatment of cancer patients.
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Affiliation(s)
- Min Zhao
- State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China; Department of Pharmacy, The First Affiliated Hospital of Xiamen University, Xiamen, China.
| | - Qiufang Chen
- Science and Education Division, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen, China.
| | - Wanfeng Xu
- State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China.
| | - Hong Wang
- State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China.
| | - Yuan Che
- State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China.
| | - Mengqiu Wu
- State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China.
| | - Lin Wang
- State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China.
| | - Cao Lijuan
- State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China.
| | - Haiping Hao
- State Key Laboratory of Natural Medicines, Key Lab of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China.
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Inhibition of PDE4 protects neurons against oxygen-glucose deprivation-induced endoplasmic reticulum stress through activation of the Nrf-2/HO-1 pathway. Redox Biol 2019; 28:101342. [PMID: 31639651 PMCID: PMC6807264 DOI: 10.1016/j.redox.2019.101342] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 10/07/2019] [Accepted: 10/10/2019] [Indexed: 12/17/2022] Open
Abstract
Inhibition of phosphodiesterase 4 (PDE4) produces neuroprotective effects against cerebral ischemia. However, the involved mechanism remains unclear. Augmentation of endoplasmic reticulum (ER) stress promotes neuronal apoptosis, and excessive oxidative stress is an inducer of ER stress. The present study aimed to determine whether suppression of ER stress is involved in the protective effects of PDE4 inhibition against cerebral ischemia. We found that exposing HT-22 cells to oxygen-glucose deprivation (OGD) significantly activated ER stress, as evidenced by increased expression of the 78-kDa glucose-regulated protein (GRP78), phosphorylated eukaryotic translation-initiation factor 2α (eIF2α), and C/EBP-homologous protein (CHOP). Overexpression of PDE4B increased ER stress, while knocking down PDE4B or treatment with the PDE4 inhibitor, FCPR03, prevented OGD-induced ER stress in HT-22 cells. Furthermore, FCPR03 promoted the translocation of nuclear factor erythroid 2-related factor 2 (Nrf-2) from the cytoplasm to the nucleus. Importantly, the Nrf-2 inhibitor, ML385, blocked the inhibitory role of FCPR03 on OGD-induced ER stress. ML385 also abolished the protective role of FCPR03 in HT-22 cells subjected to OGD. Knocking down heme oxygenase-1 (HO-1), which is a target of Nrf-2, also blocked the protective role of FCPR03, enhanced the level of reactive oxygen species (ROS), and increased ER stress and cell death. We then found that FCPR03 or the antioxidant, N-Acetyl-l-cysteine, reduced oxidative stress in cells exposed to OGD. This effect was accompanied by increased cell viability and decreased ER stress. In primary cultured neurons, we found that FCPR03 reduced OGD-induced production of ROS and phosphorylation of eIF2α. The neuroprotective effect of FCPR03 against OGD in neurons was blocked by ML385. These results demonstrate that inhibition of PDE4 activates Nrf-2/HO-1, attenuates the production of ROS, and thereby attenuates ER stress in neurons exposed to OGD. Additionally, we conclude that FCPR03 may represent a promising therapeutic agent for the treatment of ER stress-related disorders. Overexpression of PDE4 increased ER stress under both basal and OGD conditions. Inhibition of PDE4 reduced ER stress and neuronal apoptosis in neurons exposed to OGD. PDE4 inhibition activated Nrf-2, and increased the level of antioxidant enzyme HO-1. Inhibition of Nrf-2 attenuated the role of FCPR03 on ER stress and cell viability. HO-1 knockdown abolished the effects of FCPR03 on ER stress and ROS production.
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31
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Kumar V, Mesentier-Louro LA, Oh AJ, Heng K, Shariati MA, Huang H, Hu Y, Liao YJ. Increased ER Stress After Experimental Ischemic Optic Neuropathy and Improved RGC and Oligodendrocyte Survival After Treatment With Chemical Chaperon. Invest Ophthalmol Vis Sci 2019; 60:1953-1966. [PMID: 31060051 PMCID: PMC6735778 DOI: 10.1167/iovs.18-24890] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Purpose Increased endoplasmic reticulum (ER) stress is one of the earliest subcellular changes in neuro-ophthalmic diseases. In this study, we investigated the expression of key molecules in the ER stress pathways following nonarteritic anterior ischemic optic neuropathy (AION), the most common acute optic neuropathy in adults over 50, and assessed the impact of chemical chaperon 4-phenylbutyric acid (4-PBA) in vivo. Methods We induced AION using photochemical thrombosis in adult mice and performed histologic analyses of key molecules in the ER stress pathway in the retina and optic nerve. We also assessed the effects of daily intraperitoneal injections of 4-PBA after AION. Results In the retina at baseline, there was low proapoptotic transcriptional regulator C/EBP homologous protein (CHOP) and high prosurvival chaperon glucose-regulated protein 78 (GRP78) expression in retinal ganglion cells (RGCs). One day after AION, there was significantly increased CHOP and reduced GRP78 expressions in the ganglion cell layer. In the optic nerve at baseline, there was little CHOP and high GRP78 expression. One day after AION, there was significantly increased CHOP and no change in GRP78 expression. Treatment immediately after AION using daily intraperitoneal injection of chemical chaperone 4-PBA for 19 days significantly rescued Brn3A+ RGCs and Olig2+ optic nerve oligodendrocytes. Conclusions We showed for the first time that acute AION resulted in increased ER stress and differential expression of ER stress markers CHOP and GRP78 in the retina and optic nerve. Rescue of RGCs and oligodendrocytes with 4-PBA provides support for ER stress reduction as possible treatment for AION.
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Affiliation(s)
- Varun Kumar
- Department of Ophthalmology, Stanford University, School of Medicine, Stanford, California, United States
| | | | - Angela Jinsook Oh
- Department of Ophthalmology, Stanford University, School of Medicine, Stanford, California, United States
| | - Kathleen Heng
- Department of Ophthalmology, Stanford University, School of Medicine, Stanford, California, United States
| | - Mohammad Ali Shariati
- Department of Ophthalmology, Stanford University, School of Medicine, Stanford, California, United States
| | - Haoliang Huang
- Department of Ophthalmology, Stanford University, School of Medicine, Stanford, California, United States
| | - Yang Hu
- Department of Ophthalmology, Stanford University, School of Medicine, Stanford, California, United States
| | - Yaping Joyce Liao
- Department of Ophthalmology, Stanford University, School of Medicine, Stanford, California, United States.,Department of Neurology, Stanford University, School of Medicine, Stanford, California, United States
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32
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Chen Y, Liu S, Chen G. Aggravation of Cerebral Ischemia/Reperfusion Injury by Peroxisome Proliferator-Activated Receptor-Gamma Deficiency via Endoplasmic Reticulum Stress. Med Sci Monit 2019; 25:7518-7526. [PMID: 31588926 PMCID: PMC6792513 DOI: 10.12659/msm.915914] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Ischemic stroke is a dominant contributor to disability and mortality worldwide and is recognized as an important health concern. As a transcription factor triggered via stress, peroxisome proliferator-activated receptor-gamma (PPAR-γ) has a crucial impact on differentiation, cell death, and cell growth. However, the role of PPAR-γ and its precise mechanism in cerebral ischemia injury (CII) remain unclear. MATERIAL AND METHODS The male C57Bl/6 mice (12 weeks old, n=52) were subjected to middle cerebral artery occlusion (MCAO). Infarct volume was evaluated by 2, 3, 5-Triphenyltetrazolium chloride staining. Cell apoptosis was measured by terminal dUTP nick-end labeling (TUNEL) staining. The expression of apoptotic-related protein was examined by Western blotting. Neuron2A cells were transfected with PPAR-γ-specific siRNA and then were subjected to oxygen-glucose exhaustion and reoxygenation. RESULTS It was observed that PPAR-γ-deficient mice displayed extended infarct trigon in the MCAO stroke model. Neuronal deficiency was more severe in PPAR-γ-deficient models. Additionally, expression of cell death-promoting Bcl-2 associated X and active caspase-3 was reinforced, while that of cell death-counteracting Bcl-2 was repressed in PPAR-γ-deficient mice. This was characterized by reinforced endoplasmic reticulum (ER) stress reactions in in vivo brain specimens as well as in vitro neurons in ischemia/reperfusion (I/R) injury. CONCLUSIONS This research proved that PPAR-γ protected the brain from cerebral I/R injury by repressing ER stress and indicated that PPAR-γ is a potential target in the treatment of ischemia.
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Affiliation(s)
- Yueping Chen
- Clinical Laboratory, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, Zhejiang, China (mainland)
| | - Shihui Liu
- Department of Neurology, Linyi Central Hospital, Linyi, Shandong, China (mainland)
| | - Guangyong Chen
- Department of Neurology, The Third Affiliated Hospital of Wenzhou Medical University, Ruian, Zhejiang, China (mainland)
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Doycheva D, Xu N, Tang J, Zhang J. Viral-mediated gene delivery of TMBIM6 protects the neonatal brain via disruption of NPR-CYP complex coupled with upregulation of Nrf-2 post-HI. J Neuroinflammation 2019; 16:174. [PMID: 31472686 PMCID: PMC6717394 DOI: 10.1186/s12974-019-1559-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 08/15/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Oxidative stress, inflammation, and endoplasmic reticulum (ER) stress play a major role in the pathogenesis of neonatal hypoxic-ischemic (HI) injury. ER stress results in the accumulation of unfolded proteins that trigger the NADPH-P450 reductase (NPR) and the microsomal monooxygenase system which is composed of cytochrome P450 members (CYP) generating reactive oxygen species (ROS) as well as the release of inflammatory cytokines. We explored the role of Bax Inhibitor-1 (BI-1) protein, encoded by the Transmembrane Bax inhibitor Motif Containing 6 (TMBIM6) gene, in protection from ER stress after HI brain injury. BI-1 may attenuate ER stress-induced ROS production and release of inflammatory mediators via (1) disruption of the NPR-CYP complex and (2) upregulation of Nrf-2, a redox-sensitive transcription factor, thus promoting an increase in anti-oxidant enzymes to inhibit ROS production. The main objective of our study is to evaluate BI-1's inhibitory effects on ROS production and inflammation by overexpressing BI-1 in 10-day-old rat pups. METHODS Ten-day-old (P10) unsexed Sprague-Dawley rat pups underwent right common carotid artery ligation, followed by 1.5 h of hypoxia. To overexpress BI-1, rat pups were intracerebroventricularly (icv) injected at 48 h pre-HI with the human adenoviral vector-TMBIM6 (Ad-TMBIM6). BI-1 and Nrf-2 silencing were achieved by icv injection at 48 h pre-HI using siRNA to elucidate the potential mechanism. Percent infarcted area, immunofluorescent staining, DHE staining, western blot, and long-term neurobehavior assessments were performed. RESULTS Overexpression of BI-1 significantly reduced the percent infarcted area and improved long-term neurobehavioral outcomes. BI-1's mediated protection was observed to be via inhibition of P4502E1, a major contributor to ROS generation and upregulation of pNrf-2 and HO-1, which correlated with a decrease in ROS and inflammatory markers. This effect was reversed when BI-1 or Nrf-2 were inhibited. CONCLUSIONS Overexpression of BI-1 increased the production of antioxidant enzymes and attenuated inflammation by destabilizing the complex responsible for ROS production. BI-1's multimodal role in inhibiting P4502E1, together with upregulating Nrf-2, makes it a promising therapeutic target.
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Affiliation(s)
- Desislava Doycheva
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA
| | - Ningbo Xu
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA
| | - Jiping Tang
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA
| | - John Zhang
- Department of Physiology and Pharmacology, Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA
- Departments of Anesthesiology, Neurosurgery and Neurology, Loma Linda University School of Medicine, 11041 Campus Street, Risley Hall, Loma Linda, CA 92354 USA
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Nickel Enhances Zinc-Induced Neuronal Cell Death by Priming the Endoplasmic Reticulum Stress Response. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:9693726. [PMID: 31316722 PMCID: PMC6604344 DOI: 10.1155/2019/9693726] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/16/2019] [Accepted: 05/29/2019] [Indexed: 12/11/2022]
Abstract
Trace metals such as zinc (Zn), copper (Cu), and nickel (Ni) play important roles in various physiological functions such as immunity, cell division, and protein synthesis in a wide variety of species. However, excessive amounts of these trace metals cause disorders in various tissues of the central nervous system, respiratory system, and other vital organs. Our previous analysis focusing on neurotoxicity resulting from interactions between Zn and Cu revealed that Cu2+ markedly enhances Zn2+-induced neuronal cell death by activating oxidative stress and the endoplasmic reticulum (ER) stress response. However, neurotoxicity arising from interactions between zinc and metals other than copper has not been examined. Thus, in the current study, we examined the effect of Ni2+ on Zn2+-induced neurotoxicity. Initially, we found that nontoxic concentrations (0–60 μM) of Ni2+ enhance Zn2+-induced neurotoxicity in an immortalized hypothalamic neuronal cell line (GT1-7) in a dose-dependent manner. Next, we analyzed the mechanism enhancing neuronal cell death, focusing on the ER stress response. Our results revealed that Ni2+ treatment significantly primed the Zn2+-induced ER stress response, especially expression of the CCAAT-enhancer-binding protein homologous protein (CHOP). Finally, we examined the effect of carnosine (an endogenous peptide) on Ni2+/Zn2+-induced neurotoxicity and found that carnosine attenuated Ni2+/Zn2+-induced neuronal cell death and ER stress occurring before cell death. Based on our results, Ni2+ treatment significantly enhances Zn2+-induced neuronal cell death by priming the ER stress response. Thus, compounds that decrease the ER stress response, such as carnosine, may be beneficial for neurological diseases.
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Curcumin mitigates axonal injury and neuronal cell apoptosis through the PERK/Nrf2 signaling pathway following diffuse axonal injury. Neuroreport 2019; 29:661-677. [PMID: 29570500 PMCID: PMC5959262 DOI: 10.1097/wnr.0000000000001015] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Diffuse axonal injury (DAI) accounts for more than 50% of all traumatic brain injury. In response to the mechanical damage associated with DAI, the abnormal proteins produced in the neurons and axons, namely, β-APP and p-tau, induce endoplasmic reticulum (ER) stress. Curcumin, a major component extracted from the rhizome of Curcuma longa, has shown potent anti-inflammatory, antioxidant, anti-infection, and antitumor activity in previous studies. Moreover, curcumin is an activator of nuclear factor-erythroid 2-related factor 2 (Nrf2) and promotes its nuclear translocation. In this study, we evaluated the therapeutic potential of curcumin for the treatment of DAI and investigated the mechanisms underlying the protective effects of curcumin against neural cell death and axonal injury after DAI. Rats subjected to a model of DAI by head rotational acceleration were treated with vehicle or curcumin to evaluate the effect of curcumin on neuronal and axonal injury. We observed that curcumin (20 mg/kg intraperitoneal) administered 1 h after DAI induction alleviated the aggregation of p-tau and β-APP in neurons, reduced ER-stress-related cell apoptosis, and ameliorated neurological deficits. Further investigation showed that the protective effect of curcumin in DAI was mediated by the PERK/Nrf2 pathway. Curcumin promoted PERK phosphorylation, and then Nrf2 dissociated from Keap1 and was translocated to the nucleus, which activated ATF4, an important bZIP transcription factor that maintains intracellular homeostasis, but inhibited the CHOP, a hallmark of ER stress and ER-associated programmed cell death. In summary, we demonstrate for the first time that curcumin confers protection against abnormal proteins and neuronal apoptosis after DAI, that the process is mediated by strengthening of the unfolded protein response to overcome ER stress, and that the protective effect of curcumin against DAI is dependent on the activation of Nrf2.
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Li H, Zhang X, Qi X, Zhu X, Cheng L. Icariin Inhibits Endoplasmic Reticulum Stress-induced Neuronal Apoptosis after Spinal Cord Injury through Modulating the PI3K/AKT Signaling Pathway. Int J Biol Sci 2019; 15:277-286. [PMID: 30745820 PMCID: PMC6367543 DOI: 10.7150/ijbs.30348] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 11/28/2018] [Indexed: 12/13/2022] Open
Abstract
Endoplasmic reticulum (ER) stress-induced neuronal apoptosis is a crucial pathological process of spinal cord injury (SCI). In our previous study, icariin (ICA) showed neuroprotective effects in SCI. However, the relationships between ER stress and ICA in SCI are unclear yet. Therefore, whether ICA could ameliorate SCI via attenuating ER stress was investigated in vitro and in vivo. Adult mice were established SCI model and received vehicle solution or ICA by gavage once per day in vivo. The primary cultured cells were treated with or without thapsigargin (TG), ICA or LY294002 to induce ER stress in vitro. Motor dysfunction, neuronal apoptosis, tissue damage and inhibition of PI3K/AKT pathway were induced by ER stress after SCI. But ICA administration significantly enhanced motor recovery and protected spinal cord tissues against infraction and hemorrhage, etc. post injury. Meanwhile, the expression of ER stress markers ATF6, IRE1α, GRP78, XBP1 and eIF2α was decreased, while the level of p-AKT/AKT was increased by ICA. Furthermore, ICA significantly inhibited the expression of ER stress apoptotic proteins caspase-12, CHOP, Bax/Bcl-2, caspase-9 and caspase-3. Moreover, immunofluorescence double staining indicated that ICA reduced GRP78, CHOP and TUNEL positive neurons following SCI. However, this beneficial effect of ICA was abolished by PI3K/AKT inhibitor LY294002 in vitro. Finally, ICA preserved the ultra-structure of ER by transmission electron microscope histologically. This study suggested that the neuroprotective effect of ICA on motor recovery and neuronal survival was related to attenuating ER stress via PI3K/AKT signaling pathway after SCI.
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Affiliation(s)
- Haotian Li
- Department of Spine Surgery, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China.,Key Laboratory of spine and spinal cord injury repair and regeneration (Tongji University), Ministry of Education, Shanghai, China
| | - Xinran Zhang
- School & Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai 200072, China
| | - Xi Qi
- Department of Spine Surgery, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China.,Key Laboratory of spine and spinal cord injury repair and regeneration (Tongji University), Ministry of Education, Shanghai, China
| | - Xu Zhu
- Department of Spine Surgery, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China.,Key Laboratory of spine and spinal cord injury repair and regeneration (Tongji University), Ministry of Education, Shanghai, China
| | - Liming Cheng
- Department of Spine Surgery, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China.,Key Laboratory of spine and spinal cord injury repair and regeneration (Tongji University), Ministry of Education, Shanghai, China
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Huang Q, Lan T, Lu J, Zhang H, Zhang D, Lou T, Xu P, Ren J, Zhao D, Sun L, Li X, Wang J. DiDang Tang Inhibits Endoplasmic Reticulum Stress-Mediated Apoptosis Induced by Oxygen Glucose Deprivation and Intracerebral Hemorrhage Through Blockade of the GRP78-IRE1/PERK Pathways. Front Pharmacol 2018; 9:1423. [PMID: 30564125 PMCID: PMC6288198 DOI: 10.3389/fphar.2018.01423] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/19/2018] [Indexed: 12/14/2022] Open
Abstract
DiDang Tang (DDT), a Chinese traditional medicine formula, contains 4 Chinese traditional medicine substances, has been widely used to treat intracerebral hemorrhage (ICH) patients. However, the molecular mechanisms of DDT for protecting neurons from oxygen and glucose deprivation (OGD)-induced endoplasmic reticulum (ER) stress and apoptosis after ICH still remains elusive. In this study, high-performance liquid chromatography fingerprint analysis was performed to learn the features of the chemical compositions of DDT. OGD-induced ER stress, Ca2+ overload, and mitochondrial apoptosis were investigated in nerve growth factor -induced PC12, primary neuronal cells, and ICH rats to evaluate the protective effect of DDT. We found that DDT treatment protected neurons against OGD-induced damage and apoptosis by increasing cell viability and reducing the release of lactate dehydrogenase. DDT decreased OGD-induced Ca2+ overload and ER stress through the blockade of the glucose-regulated protein 78 (GRP78)- inositol-requiring protein 1α (IRE1)/ protein kinase RNA-like ER kinase (PERK) pathways and also inhibited apoptosis by decreasing mitochondrial damage. Moreover, we observed similar findings when we studied DDT for inhibition of ER stress in a rat model of ICH. In addition, our experiments further confirmed the neuroprotective potential of DDT against tunicamycin (TM)-induced neural damage. Our in vitro and in vivo results indicated that the neuroprotective effect of DDT against ER stress damage and apoptosis occurred mainly by blocking the GPR78-IRE1/PERK pathways. Taken together, it provides reliable experimental evidence and explains the molecular mechanism of DDT for the treatment of patients with ICH.
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Affiliation(s)
- Qingxia Huang
- Research Center of Traditional Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China.,Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - Tianye Lan
- Department of Encephalopathy, Changchun University of Chinese Medicine, Changchun, China
| | - Jing Lu
- Research Center of Traditional Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China.,Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - He Zhang
- Research Center of Traditional Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China.,Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - Dongmei Zhang
- Scientific Research Office, Changchun University of Chinese Medicine, Changchun, China
| | - Tingting Lou
- Research Center of Traditional Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China.,Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - Peng Xu
- Department of Encephalopathy, Changchun University of Chinese Medicine, Changchun, China
| | - Jixiang Ren
- Department of Encephalopathy, Changchun University of Chinese Medicine, Changchun, China
| | - Daqing Zhao
- Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China.,Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China
| | - Liwei Sun
- Research Center of Traditional Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China
| | - Xiangyan Li
- Jilin Provincial Key Laboratory of BioMacromolecules of Chinese Medicine, Changchun University of Chinese Medicine, Changchun, China.,Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China
| | - Jian Wang
- Department of Encephalopathy, Changchun University of Chinese Medicine, Changchun, China
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Zhong CJ, Chen MM, Lu M, Ding JH, Du RH, Hu G. Astrocyte-specific deletion of Kir6.1/K-ATP channel aggravates cerebral ischemia/reperfusion injury through endoplasmic reticulum stress in mice. Exp Neurol 2018; 311:225-233. [PMID: 30315808 DOI: 10.1016/j.expneurol.2018.10.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 09/27/2018] [Accepted: 10/09/2018] [Indexed: 12/16/2022]
Abstract
ATP-sensitive potassium (K-ATP) channels, coupling cell metabolism to cell membrane potential, are involved in brain diseases including stroke. Emerging evidence shows that astrocytes play important roles in the pathophysiology of cerebral ischemia. Kir6.1, a pore-forming subunit of K-ATP channel, is prominently expressed in astrocytes and participates in regulating its function. However, the exact role of astrocytic Kir6.1-containg K-ATP channel (Kir6.1/K-ATP) in ischemic stroke remains unclear. Here, we found that astrocytic Kir6.1 knockout (KO) mice exhibited larger infarct areas and more severe brain edema and neurological deficits in middle cerebral artery occlusion stroke model. Both activated gliosis and neuronal loss were aggravated in astrocytic Kir6.1 KO mice. Furthermore, the protein levels of pro-apoptotic protein Bcl-2 associated X (Bax) and active caspase-3 were up-regulated and the expression of anti-apoptotic protein Bcl-2 was down-regulated in astrocytic Kir6.1 KO mice. This is accompanied by enhanced endoplasmic reticulum stress (ER stress) responses in brain tissues and in astrocytes during ischemia/reperfusion (I/R) injury. Finally, inhibition of ER stress rescued astrocyte apoptosis induced by Kir6.1 deletion during I/R injury. Collectively, our findings reveal that astrocytic Kir6.1/K-ATP channel protects brain from cerebral ischemia/reperfusion injury through inhibiting ER stress and suggest that astrocytic Kir6.1/K-ATP channel is a promising therapeutic target for ischemic stroke.
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Affiliation(s)
- Chong-Jin Zhong
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, 101 Nongmian Avenue, Nanjing, Jiangsu 211166, PR China
| | - Miao-Miao Chen
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, 101 Nongmian Avenue, Nanjing, Jiangsu 211166, PR China
| | - Ming Lu
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, 101 Nongmian Avenue, Nanjing, Jiangsu 211166, PR China
| | - Jian-Hua Ding
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, 101 Nongmian Avenue, Nanjing, Jiangsu 211166, PR China
| | - Ren-Hong Du
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, 101 Nongmian Avenue, Nanjing, Jiangsu 211166, PR China.
| | - Gang Hu
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, 101 Nongmian Avenue, Nanjing, Jiangsu 211166, PR China; Department of Pharmacology, Nanjing University of Chinese Medicine, 138 Xianlin, PR China.
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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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Relevance of the hippocampal endoplasmic reticulum stress response in a mouse model of chronic kidney disease. Neurosci Lett 2018; 677:26-31. [DOI: 10.1016/j.neulet.2018.04.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/15/2018] [Accepted: 04/11/2018] [Indexed: 12/21/2022]
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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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Heparin-based coacervate of bFGF facilitates peripheral nerve regeneration by inhibiting endoplasmic reticulum stress following sciatic nerve injury. Oncotarget 2018. [PMID: 28624802 PMCID: PMC5564628 DOI: 10.18632/oncotarget.18256] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Creating a microenvironment at the injury site that favors axonal regrowth and remyelinationis pivotal to the success of therapeutic reinnervation. The mature myelin sheath of the peripheral nervous system depends on active participation of Schwann cells to form new cytoskeletal components and tremendous amounts of relevant neurotrophic factors. In this study, we utilized a new biomaterial for growth factor delivery consisting of a biocompatible polycation, poly(ethylene argininylaspartatediglyceride) and heparin. It is capable of binding a variety of growth factors to deliver basic fibroblast growth factor (bFGF) through polyvalent ionic interactions for nerve repair. In vitro assays demonstrated that the bFGF loading efficiency reached 10 μg and this delivery vehicle could control the release of bFGF. In vivo, the coacervate enhanced bFGF bioavailability, which improved both motor and sensory function. It could also acceleratemyelinated fiber regeneration and remyelination and promote Schwann cells proliferation. Furthermore, the neuroprotective effect of bFGF-coacervate in sciatic nerve injury was associated with the alleviation of endoplasmic reticulum stress signal. This heparin-based delivery platform leads to increased bFGF loading efficiency and better controls its release, which will provide an effective strategy for peripheral nerve injury regeneration therapy.
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Microglia Polarization and Endoplasmic Reticulum Stress in Chronic Social Defeat Stress Induced Depression Mouse. Neurochem Res 2018; 43:985-994. [PMID: 29574669 DOI: 10.1007/s11064-018-2504-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/30/2018] [Accepted: 02/23/2018] [Indexed: 12/27/2022]
Abstract
Inflammation recently has been considered to be participated in the pathogenesis of major depressive disorder (MDD). However, the detailed mechanism of inflammation in depression has not been completely understood yet. In the present study, depression mice model was established by chronic social defeat stress (CSDS) method and confirmed by behavior examinations including forced swimming test and sucrose preference test. The decrease of spine density and postsynaptic density protein 95 (PSD95) in hippocampus further verified the depression model. Then, the microglia polarization state and endoplasmic reticulum (ER) stress were investigated. At transcriptional level, M1 marker (inducible nitric oxide synthase (iNOS), CD16, CD86, CXCL10) in CSDS mice was higher than that in control group while there was no difference in M2 marker (Arginase and CD206) between two groups. And it was observed in the hippocampus of CSDS induced depression mice that increased activated microglia was merged with iNOS instead of arginase by immunofluorescence staining. Furthermore, the M1 marker Interleukin (IL)-1β and tumor necrosis factor (TNF)-α were increased in depression mice while the M1 marker IL-6 and M2 marker IL-10 remained unchanged. The expression of ER stress signaling factors, including protein kinase RNA-like ER kinase (PERK), Phosphorylated α-subunit of eukaryotic translation initiation factor 2(p-eIF2α), C/EBP homologous protein (CHOP), and X-box binding protein 1(XBP1) were significantly higher in CSDS-induced depression mice than in control mice. In all, our results suggest that M1 polarization and ER stress play a vital role in MDD pathogenesis.
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44
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Zhou Y, Wu Y, Liu Y, He Z, Zou S, Wang Q, Li J, Zheng Z, Chen J, Wu F, Gong F, Zhang H, Xu H, Xiao J. The cross-talk between autophagy and endoplasmic reticulum stress in blood-spinal cord barrier disruption after spinal cord injury. Oncotarget 2018; 8:1688-1702. [PMID: 27926492 PMCID: PMC5352089 DOI: 10.18632/oncotarget.13777] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 11/07/2016] [Indexed: 01/07/2023] Open
Abstract
Spinal cord injury induces the disruption of blood-spinal cord barrier and triggers a complex array of tissue responses, including endoplasmic reticulum (ER) stress and autophagy. However, the roles of ER stress and autophagy in blood-spinal cord barrier disruption have not been discussed in acute spinal cord trauma. In the present study, we respectively detected the roles of ER stress and autophagy in blood-spinal cord barrier disruption after spinal cord injury. Besides, we also detected the cross-talking between autophagy and ER stress both in vivo and in vitro. ER stress inhibitor, 4-phenylbutyric acid, and autophagy inhibitor, chloroquine, were respectively or combinedly administrated in the model of acute spinal cord injury rats. At day 1 after spinal cord injury, blood-spinal cord barrier was disrupted and activation of ER stress and autophagy were involved in the rat model of trauma. Inhibition of ER stress by treating with 4-phenylbutyric acid decreased blood-spinal cord barrier permeability, prevented the loss of tight junction (TJ) proteins and reduced autophagy activation after spinal cord injury. On the contrary, inhibition of autophagy by treating with chloroquine exacerbated blood-spinal cord barrier permeability, promoted the loss of TJ proteins and enhanced ER stress after spinal cord injury. When 4-phenylbutyric acid and chloroquine were combinedly administrated in spinal cord injury rats, chloroquine abolished the blood-spinal cord barrier protective effect of 4-phenylbutyric acid by exacerbating ER stress after spinal cord injury, indicating that the cross-talking between autophagy and ER stress may play a central role on blood-spinal cord barrier integrity in acute spinal cord injury. The present study illustrates that ER stress induced by spinal cord injury plays a detrimental role on blood-spinal cord barrier integrity, on the contrary, autophagy induced by spinal cord injury plays a furthersome role in blood-spinal cord barrier integrity in acute spinal cord injury.
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Affiliation(s)
- Yulong Zhou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Yanqing Wu
- The Institute of Life Sciences, Wenzhou University, Wenzhou 325035, China
| | - Yanlong Liu
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Zili He
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Shuang Zou
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Qingqing Wang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Jiawei Li
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Zengming Zheng
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Jian Chen
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Fenzan Wu
- Department of Neurosurgery, Affiliated Cixi People's Hospital, Wenzhou Medical University, Ningbo, 315300, China
| | - Fanhua Gong
- The Institute of Life Sciences, Wenzhou University, Wenzhou 325035, China
| | - Hongyu Zhang
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Huazi Xu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
| | - Jian Xiao
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 China
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45
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Kaur B, Bhat A, Chakraborty R, Adlakha K, Sengupta S, Roy S, Chakraborty K. Proteomic profile of 4-PBA treated human neuronal cells during ER stress. Mol Omics 2018; 14:53-63. [PMID: 29570205 DOI: 10.1039/c7mo00114b] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Perturbations affecting the homoeostasis of endoplasmic reticulum (ER) activate an adaptive signaling known as the unfolded protein response or UPR. Many studies have reported the association between neurological disorders and ER stress. Decreasing ER stress may therefore aid in therapeutic control of neuronal diseases. Sodium 4-phenylbutyrate (4-PBA), a small molecule, has been shown to alleviate ER stress and various neurological diseases, but the mechanistic basis of its action is not well understood. Using an iTRAQ based LC-MS technique we have delineated the effect of 4-PBA on the proteome of human neuroblastoma cells (SK-N-SH) during Tunicamycin-induced ER stress. The proteomic profile of 4-PBA-treated cells revealed that 4-PBA does not alter the cellular proteome to adapt towards ER stress. However, it can alleviate both the toxicity and proteomic alterations, induced by an ER stress inducer. Hence, the therapeutic effect of 4-PBA is primarily due to its ability to resolve ER stress rather than its ability to alter the expression of proteins required for maintaining ER proteostasis. Thus, we posit here that 4-PBA acts as an authentic chemical chaperone by aiding protein folding in the ER.
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Affiliation(s)
- Bhavneet Kaur
- Genomics and Molecular Medicine, CSIR-IGIB, Mathura Road, New Delhi, India.
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46
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Ni H, Rui Q, Li D, Gao R, Chen G. The Role of IRE1 Signaling in the Central Nervous System Diseases. Curr Neuropharmacol 2018; 16:1340-1347. [PMID: 29663887 PMCID: PMC6251047 DOI: 10.2174/1570159x16666180416094646] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 08/07/2017] [Accepted: 02/28/2018] [Indexed: 01/14/2023] Open
Abstract
The accumulation of misfolded or unfolded proteins in endoplasmic reticulum (ER) lumen results in the activation of an adaptive stress process called the unfolded protein response (UPR). As the most conserved signaling branch of the UPR, Inositol-requiring enzyme 1 (IRE1) possesses both Ser/Thr kinase and RNase activities operating as major stress sensors, mediating both adaptive and pro-apoptotic pathways under ER stress. Over the last three decades, a mounting body of evidence has shown that IRE1 signaling dysfunction is involved in the pathology of various neurological disorders. Targeting this pathway has emerged as a promising therapeutic strategy against these diseases. In this review, we provide a general overview about the expression and physiological function of IRE1 signaling and its pathophysiological roles in the central nervous system diseases.
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Affiliation(s)
| | | | - Di Li
- Address correspondence to this author at the Department of Translational Medicine Center, The First People’s Hospital of Zhangjiagang City, Suzhou, Jiangsu, P.R. China; Tel: +86-18921962599; E-mail:
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47
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Zheng B, Zhou Y, Zhang H, Yang G, Hong Z, Han D, Wang Q, He Z, Liu Y, Wu F, Zhang X, Tong S, Xu H, Xiao J. Dl-3-n-butylphthalide prevents the disruption of blood-spinal cord barrier via inhibiting endoplasmic reticulum stress following spinal cord injury. Int J Biol Sci 2017; 13:1520-1531. [PMID: 29230100 PMCID: PMC5723918 DOI: 10.7150/ijbs.21107] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Accepted: 10/15/2017] [Indexed: 11/25/2022] Open
Abstract
After spinal cord injury (SCI), the destruction of blood-spinal cord barrier (BSCB) is shown to accelerate gathering of noxious blood-derived components in the nervous system, leading to secondary neurodegenerative damages. SCI activates endoplasmic reticulum stress (ER stress), which is considered to evoke secondary damages of neurons and glia. Recent evidence indicates that Dl-3-n-butylphthalide (NBP) has the neuroprotective effect in ischaemic brain injury, but whether it has protective effects on SCI or not is largely unclear. Here, we show that NBP prevented BSCB disruption after SCI via inhibition of ER stress. Following a moderate contusion injury of the T9 level of spinal cord, NBP was administered by oral gavage and further treated once a day. NBP significantly attenuated BSCB permeability and breakdown of adherens junction (AJ) and tight junction (TJ) proteins, then improved locomotion recovery following SCI. The protective role of NBP on BSCB disruption is associated with the restrain of ER stress caused by SCI. Furthermore, NBP considerably constrained the expression of ER stress-associated proteins and degradation of TJ and AJ in human brain microvascular endothelial cells (HBMECs) treated with TG. In conclusion, our results indicate that ER stress is associated with the disruption of BSCB integrity after injury, NBP attenuates BSCB disruption via inhibiting ER stress and improve functional recovery following SCI.
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Affiliation(s)
- Binbin Zheng
- Department of Orthopaedics, Taizhou Hospital, Wenzhou Medical University, Linhai, Zhejiang, 317000 PR China.,Key Laboratory of Orthopaedics of Zhejiang Province, Department of Orthopaedics, The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China.,Molecular Pharmacology Research Center, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China
| | - Yulong Zhou
- Key Laboratory of Orthopaedics of Zhejiang Province, Department of Orthopaedics, The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China.,Molecular Pharmacology Research Center, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China
| | - Hongyu Zhang
- Molecular Pharmacology Research Center, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China
| | - Guangyong Yang
- Department of Orthopaedics, Taizhou Hospital, Wenzhou Medical University, Linhai, Zhejiang, 317000 PR China
| | - Zhenghua Hong
- Department of Orthopaedics, Taizhou Hospital, Wenzhou Medical University, Linhai, Zhejiang, 317000 PR China
| | - Dandan Han
- Department of Orthopaedics, Taizhou Hospital, Wenzhou Medical University, Linhai, Zhejiang, 317000 PR China
| | - Qingqing Wang
- Key Laboratory of Orthopaedics of Zhejiang Province, Department of Orthopaedics, The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China
| | - Zili He
- Key Laboratory of Orthopaedics of Zhejiang Province, Department of Orthopaedics, The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China
| | - Yanlong Liu
- Molecular Pharmacology Research Center, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China
| | - Fenzan Wu
- Department of Neurosurgery, Affiliated Cixi People's Hospital, Wenzhou Medical University, Ningbo, Zhejiang, 315300, PR China
| | - Xie Zhang
- Department of Gastroenterology, Ningbo Medical Treatment Center Li Hui-li Hospital, Ningbo, Zhejiang, 315040, PR China
| | - Songlin Tong
- Department of Neurosurgery, Affiliated Cixi People's Hospital, Wenzhou Medical University, Ningbo, Zhejiang, 315300, PR China
| | - Huazi Xu
- Key Laboratory of Orthopaedics of Zhejiang Province, Department of Orthopaedics, The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China
| | - Jian Xiao
- Molecular Pharmacology Research Center, School of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang, 325035 PR China
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48
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Tanaka KI, Shimoda M, Chuang VTG, Nishida K, Kawahara M, Ishida T, Otagiri M, Maruyama T, Ishima Y. Thioredoxin-albumin fusion protein prevents copper enhanced zinc-induced neurotoxicity via its antioxidative activity. Int J Pharm 2017; 535:140-147. [PMID: 29122608 DOI: 10.1016/j.ijpharm.2017.11.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 10/20/2017] [Accepted: 11/05/2017] [Indexed: 11/29/2022]
Abstract
Zinc (Zn) is a co-factor for a vast number of enzymes, and functions as a regulator for immune mechanism and protein synthesis. However, excessive Zn release induced in pathological situations such as stroke or transient global ischemia is toxic. Previously, we demonstrated that the interaction of Zn and copper (Cu) is involved in the pathogenesis of Alzheimer's disease and vascular dementia. Furthermore, oxidative stress has been shown to play a significant role in the pathogenesis of various metal ions induced neuronal death. Thioredoxin-Albumin fusion (HSA-Trx) is a derivative of thioredoxin (Trx), an antioxidative protein, with improved plasma retention and stability of Trx. In this study, we examined the effect of HSA-Trx on Cu2+/Zn2+-induced neurotoxicity. Firstly, HSA-Trx was found to clearly suppress Cu2+/Zn2+-induced neuronal cell death in mouse hypothalamic neuronal cells (GT1-7 cells). Moreover, HSA-Trx markedly suppressed Cu2+/Zn2+-induced ROS production and the expression of oxidative stress related genes, such as heme oxygenase-1. In contrast, HSA-Trx did not affect the intracellular levels of both Cu2+ and Zn2+ after Cu2+/Zn2+ treatment. Finally, HSA-Trx was found to significantly suppress endoplasmic reticulum (ER) stress response induced by Cu2+/Zn2+ treatment in a dose dependent manner. These results suggest that HSA-Trx counteracted Cu2+/Zn2+-induced neurotoxicity by suppressing the production of ROS via interfering the related gene expressions, in addition to the highly possible radical scavenging activity of the fusion protein. Based on these findings, HSA-Trx has great potential as a promising therapeutic agent for the treatment of refractory neurological diseases.
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Affiliation(s)
- Ken-Ichiro Tanaka
- Department of Bio-Analytical Chemistry, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Mikako Shimoda
- Department of Bio-Analytical Chemistry, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Victor T G Chuang
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500, Bandar Sunway, Selangor, Malaysia
| | - Kento Nishida
- Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
| | - Masahiro Kawahara
- Department of Bio-Analytical Chemistry, Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Tatsuhiro Ishida
- Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan
| | - Masaki Otagiri
- Faculty of Pharmaceutical Sciences and DDS Research Institute, Sojo University, 1-22-4 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
| | - Toru Maruyama
- Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
| | - Yu Ishima
- Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan.
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49
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Zhou Y, Wang Z, Li J, Li X, Xiao J. Fibroblast growth factors in the management of spinal cord injury. J Cell Mol Med 2017; 22:25-37. [PMID: 29063730 PMCID: PMC5742738 DOI: 10.1111/jcmm.13353] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 07/12/2017] [Indexed: 12/11/2022] Open
Abstract
Spinal cord injury (SCI) possesses a significant health and economic burden worldwide. Traumatic SCI is a devastating condition that evolves through two successive stages. Throughout each of these stages, disturbances in ionic homeostasis, local oedema, ischaemia, focal haemorrhage, free radicals stress and inflammatory response were observed. Although there are no fully restorative cures available for SCI patients, various molecular, cellular and rehabilitative therapies, such as limiting local inflammation, preventing secondary cell death and enhancing the plasticity of local circuits in the spinal cord, were described. Current preclinical studies have showed that fibroblast growth factors (FGFs) alone or combination therapies utilizing cell transplantation and biomaterial scaffolds are proven effective for treating SCI in animal models. More importantly, some studies further demonstrated a paucity of clinical transfer usage to promote functional recovery of numerous patients with SCI. In this review, we focus on the therapeutic capacity and pitfalls of the FGF family and its clinical application for treating SCI, including the signalling component of the FGF pathway and the role in the central nervous system, the pathophysiology of SCI and the targets for FGF treatment. We also discuss the challenges and potential for the clinical translation of FGF-based approaches into treatments for SCI.
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Affiliation(s)
- Yulong Zhou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Zhouguang Wang
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jiawei Li
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiaokun Li
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jian Xiao
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.,Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
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50
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Gu Y, Chen J, Meng Z, Yao J, Ge W, Chen K, Cheng S, Fu J, Peng L, Zhao Y. Diazoxide prevents H 2O 2-induced chondrocyte apoptosis and cartilage degeneration in a rat model of osteoarthritis by reducing endoplasmic reticulum stress. Biomed Pharmacother 2017; 95:1886-1894. [PMID: 28968949 DOI: 10.1016/j.biopha.2017.09.082] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 09/18/2017] [Accepted: 09/18/2017] [Indexed: 01/01/2023] Open
Abstract
Osteoarthritis (OA) is a common disease affecting elderly individuals. Its incidence rises sharply with age, and chondrocyte apoptosis plays a vital role in its pathogenesis. Diazoxide opens mitochondrial ATP-sensitive potassium (mitoKATP) channels and exerts multiple pharmacological effects, including reductions in blood pressure and blood sugar levels. It also exerts anti-apoptotic activities, but the cellular and molecular mechanisms by which diazoxide inhibits chondrocyte apoptosis are unknown, as is whether apoptosis is related to endoplasmic reticulum stress (ERS). In the present study, we explored the mechanism underlying the chondroprotective effect of diazoxide on hydrogen peroxide (H2O2)-stimulated chondrocyte apoptosis in rats with surgically induced OA. A cell counting kit-8 (CCK-8) assay showed that the viability of H2O2-stimulated chondrocytes was enhanced in a dose-dependent manner. However, at a concentration ≥400μM, diazoxide had other, negative effects. The protective effect of diazoxide in vitro included inhibition of the ERS response and of mitochondrial dysfunction induced by H2O2 stimulation. These responses were related to activation of the PERK1/2 and ERK1/2 signaling pathways; the prevention of chondrocyte apoptosis; the down-regulation of caspase-3, Bax, ATF-6 and C/EBP-homologous protein (CHOP) expression; and the up-regulation of Bcl-2 and Col II. In vivo, histological and immunohistochemical analyses of caspase-3 and CHOP expression revealed that diazoxide ameliorated cartilage degeneration in a rat model of OA, as revealed by histological and immunohistochemical analyses of caspase-3 and CHOP expression. Diazoxide suppressed H2O2-triggered chondrocyte apoptosis, and ameliorated cartilage degeneration, by inhibiting the development of ERS.
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Affiliation(s)
- YunTao Gu
- Trauma Center, The First Affiliated Hospital of Hainan Medical College, Haikou, Hainan Province 570100, China; Department of Orthopaedic Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Jian Chen
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - ZhuLong Meng
- Trauma Center, The First Affiliated Hospital of Hainan Medical College, Haikou, Hainan Province 570100, China
| | - JiangLing Yao
- Trauma Center, The First Affiliated Hospital of Hainan Medical College, Haikou, Hainan Province 570100, China
| | - WanYu Ge
- Department of Pathology, Anhui Provincial Hospital, HeFei City, Anhui Province 230000, China
| | - KeWei Chen
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - ShaoWen Cheng
- Trauma Center, The First Affiliated Hospital of Hainan Medical College, Haikou, Hainan Province 570100, China
| | - Jian Fu
- Trauma Center, The First Affiliated Hospital of Hainan Medical College, Haikou, Hainan Province 570100, China
| | - Lei Peng
- Trauma Center, The First Affiliated Hospital of Hainan Medical College, Haikou, Hainan Province 570100, China.
| | - YingZheng Zhao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China.
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