101
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Wang SS, Lv Y, Xu XC, Zuo Y, Song Y, Wu GP, Lu PH, Zhang ZQ, Chen MB. Triptonide inhibits human nasopharyngeal carcinoma cell growth via disrupting Lnc-RNA THOR-IGF2BP1 signaling. Cancer Lett 2019; 443:13-24. [DOI: 10.1016/j.canlet.2018.11.028] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/18/2018] [Accepted: 11/21/2018] [Indexed: 01/20/2023]
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102
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Wang X, Yuan ZL. Activation of Nrf2/HO-1 pathway protects retinal ganglion cells from a rat chronic ocular hypertension model of glaucoma. Int Ophthalmol 2019; 39:2303-2312. [PMID: 30637543 DOI: 10.1007/s10792-018-01071-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 12/31/2018] [Indexed: 01/28/2023]
Abstract
OBJECTIVE The objective of this work was to find out the effects of nuclear factor erythroid 2-related factor/heme oxygenase-1 (Nrf2/HO-1) pathway on retinal ganglion cell (RGC) injury in glaucoma. METHODS The chronic ocular hypertension (COH) rat models of glaucoma were constructed, and intraocular pressure (IOP) and RGC numbers were detected at different time points. Additionally, rats were divided into normal group (normal control rats), model group (COH model rats), and model + tBHQ group (COH model rats treated with Nrf activator, tBHQ). RGC apoptosis was detected by using TUNEL staining, and the expressions of Nrf2/HO-1 were detected by qRT-PCR and western blotting. RESULTS COH model rats showed significant IOP elevation and the increased mRNA and protein expressions of Nrf2 and HO-1 from 1 to 6 weeks after operation, with the evidently decreased RGC numbers at 4 weeks and 6 weeks after operation (all P < 0.05). Besides, rats in the model group had increased apoptosis index (AI) of RGCs and the elevated mRNA and protein expressions of Nrf2/HO-1 with remarkably reduced RGC numbers when compared with normal control rats, but the model rats treated with tBHQ exhibited an apparent decrease in AI of RGCs, as well as remarkable increases in RGC numbers and the mRNA and protein expression of Nrf2/HO-1 (all P < 0.05). CONCLUSION Activation of Nrf2/HO-1 pathway significantly reduced the apoptosis and injury of RGCs in rats with chronic ocular hypertension (COH), thereby protecting RGCs in glaucoma, which could be a promising clinical target to prevent RGC degeneration in glaucoma.
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Affiliation(s)
- Xue Wang
- Department of Ophthalmology, The First Affiliated Hospital of Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166, China.,Department of Ophthalmology, The First People's Hospital of Lianyungang, Lianyungang, 222000, China
| | - Zhi-Lan Yuan
- Department of Ophthalmology, The First Affiliated Hospital of Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166, China.
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103
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Kitakaze T, Makiyama A, Samukawa Y, Jiang S, Yamashita Y, Ashida H. A physiological concentration of luteolin induces phase II drug-metabolizing enzymes through the ERK1/2 signaling pathway in HepG2 cells. Arch Biochem Biophys 2019; 663:151-159. [PMID: 30641047 DOI: 10.1016/j.abb.2019.01.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/06/2019] [Accepted: 01/10/2019] [Indexed: 12/20/2022]
Abstract
The flavon luteolin has various health-promoting activities including cardiovascular protection, anti-inflammatory activity and anticancer activity. A serum concentration of about 100 nM luteolin is reached by dietary habit. However, little is known about the function of luteolin over its physiological concentration range. In this study, we investigated whether a physiological concentration of luteolin could activate nuclear factor-erythroid-2-related factor 2 (Nrf2)-mediated expression of phase II drug-metabolizing enzymes in human hepatoma HepG2 cells. Interestingly, less than 1 nM of luteolin could induce phase II drug-metabolizing enzymes, such as GSTs, HO-1, and NQO1. Both 1 and 100 nM luteolin increased expression and activity of ALDH2, which metabolized toxic acetaldehyde into nontoxic acetic acid. Luteolin increased nuclear accumulation of Nrf2 and enhanced the ARE-binding complex through increasing the stability of the Nrf2 protein. Luteolin increased phosphorylation of Nrf2 at Ser40, and MEK inhibitors (U0126 and PD98059) canceled luteolin-induced phosphorylation of Nrf2. Furthermore, luteolin increased modified Keap1. In conclusion, a physiological concentration of luteolin induces the expression of phase II drug-metabolizing enzymes by enhancement of Nrf2 nuclear accumulation through MEK1/2-ERK1/2-mediated phosphorylation of Nrf2, increasing Nrf2 stability and inducing a conformational change of Keap1.
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Affiliation(s)
- Tomoya Kitakaze
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Hyogo, Japan
| | - Atsushi Makiyama
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
| | - Yumi Samukawa
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
| | - Songyan Jiang
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
| | - Yoko Yamashita
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
| | - Hitoshi Ashida
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan.
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104
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Notoginsenoside R1 Protects db/db Mice against Diabetic Nephropathy via Upregulation of Nrf2-Mediated HO-1 Expression. Molecules 2019; 24:molecules24020247. [PMID: 30634720 PMCID: PMC6359411 DOI: 10.3390/molecules24020247] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 12/15/2018] [Accepted: 01/03/2019] [Indexed: 01/08/2023] Open
Abstract
Diabetic nephropathy (DN) is a leading cause of end-stage renal failure, and no effective treatment is available. Notoginsenoside R1 (NGR1) is a novel saponin that is derived from Panax notoginseng, and our previous studies showed the cardioprotective and neuroprotective effects of NGR1. However, its role in protecting against DN remains unexplored. Herein, we established an experimental model in db/db mice and HK-2 cells exposed to advanced glycation end products (AGEs). The in vivo investigation showed that NGR1 treatment increased serum lipid, β2-microglobulin, serum creatinine, and blood urea nitrogen levels of db/db mice. NGR1 attenuated histological abnormalities of kidney, as evidenced by reducing the glomerular volume and fibrosis in diabetic kidneys. In vitro, NGR1 treatment was further found to decrease AGE-induced mitochondria injury, limit an increase in reactive oxygen species (ROS), and reduce apoptosis in HK-2 cells. Mechanistically, NGR1 promoted nucleus nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) expressions to eliminate ROS that induced apoptosis and transforming growth factor beta (TGF-β) signaling. In summary, these observations demonstrate that NGR1 exerts renoprotective effects against DN through the inhibition of apoptosis and renal fibrosis caused by oxidative stress. NGR1 might be a potential therapeutic medicine for the treatment of DN.
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105
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Wang Z, Hao Y, Wang Y, Liu J, Yuan X, Sun B, Wang J. Wheat alkylresorcinols protect human retinal pigment epithelial cells against H2O2-induced oxidative damage through Akt-dependent Nrf2/HO-1 signaling. Food Funct 2019; 10:2797-2804. [DOI: 10.1039/c8fo02564a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The protective effect of wheat alkylresorcinols (ARs) on human retinal pigment epithelium cells (ARPE-19) against oxidative stress and the possible underlying mechanism were investigated in this study.
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Affiliation(s)
- Ziyuan Wang
- China–Canada Joint Lab of Food Nutrition and Health (Beijing)
- Beijing Technology & Business University (BTBU)
- Beijing 100048
- China
| | - Yiming Hao
- China–Canada Joint Lab of Food Nutrition and Health (Beijing)
- Beijing Technology & Business University (BTBU)
- Beijing 100048
- China
| | - Yu Wang
- China–Canada Joint Lab of Food Nutrition and Health (Beijing)
- Beijing Technology & Business University (BTBU)
- Beijing 100048
- China
| | - Jie Liu
- China–Canada Joint Lab of Food Nutrition and Health (Beijing)
- Beijing Technology & Business University (BTBU)
- Beijing 100048
- China
| | - Xiaoping Yuan
- Department of Science and Technology
- China Grain Reserves Corporation
- Beijing 100039
- China
| | - Baoguo Sun
- China–Canada Joint Lab of Food Nutrition and Health (Beijing)
- Beijing Technology & Business University (BTBU)
- Beijing 100048
- China
| | - Jing Wang
- China–Canada Joint Lab of Food Nutrition and Health (Beijing)
- Beijing Technology & Business University (BTBU)
- Beijing 100048
- China
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106
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Tang C, Tan S, Zhang Y, Dong L, Xu Y. Activation of Keap1-Nrf2 signaling by 4-octyl itaconate protects human umbilical vein endothelial cells from high glucose. Biochem Biophys Res Commun 2018; 508:921-927. [PMID: 30545629 DOI: 10.1016/j.bbrc.2018.12.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 12/05/2018] [Indexed: 11/24/2022]
Abstract
High glucose (HG) induces oxidative injury to cultured human umbilical vein endothelial cells (HUVECs). Recent studies have discovered 4-octyl itaconate (OI) as a novel and cell permeable Nrf2 (nuclear-factor-E2-related factor 2) activator. Its potential activity in HG-treated HUVECs was tested here. In HUVECs OI disrupted Keap1-Nrf2 association, causing Nrf2 protein accumulation and nuclear translocation, as well as transcription and expression of Nrf2-ARE-dependent genes, including HO1, NQO1 and GCLM. Significantly, pretreatment with OI potently inhibited HG (40 mM glucose)-induced death and apoptosis of HUVECs. Moreover, OI potently inhibited HG-induced reactive oxygen species (ROS) production, lipid peroxidation, superoxide accumulation and mitochondrial depolarization in HUVECs. Activation of Nrf2 is required for OI-induced cytoprotection in HUVECs. Nrf2 shRNA or knockout (by CRISPR/Cas9 method) reversed OI-mediated HUVEC protection against HG. Further studies showed that Keap1 silencing or Cys151S mutation mimicked and nullified OI-induced activity in HUVECs. Taken together, we conclude that OI activates Keap1-Nrf2 signaling to protect HUVECs from HG.
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Affiliation(s)
- Chun Tang
- Department of Nephrology, Kidney and Urology Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Shengyu Tan
- Department of Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yiqing Zhang
- Department of Nephrology, Kidney and Urology Center, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Lini Dong
- Department of Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yan Xu
- Department of Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China.
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107
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Dong J, Li Y, Xiao H, Luo D, Zhang S, Zhu C, Jiang M, Cui M, Lu L, Fan S. Cordycepin sensitizes breast cancer cells toward irradiation through elevating ROS production involving Nrf2. Toxicol Appl Pharmacol 2018; 364:12-21. [PMID: 30529626 DOI: 10.1016/j.taap.2018.12.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 12/02/2018] [Accepted: 12/05/2018] [Indexed: 12/22/2022]
Abstract
Radiation therapy toward malignancies is often ineffective owing to radioresistance of cancer cells. On the basis of anti-tumor properties of cordycepin, we examined the effects of cordycepin on sensitizing breast cancer cells toward radiotherapy. Cordycepin administration promoted G2/M arrest and apoptosis of MCF-7 and MDA-MB-231 cells resulting in restraining the proliferation of the cells in vitro and in vivo following irradiation. Mechanistic investigations showed that the breast cancer cells cultured with cordycepin harbored higher levels of intracellular reactive oxygen species (ROS) and incremental numbers of γ-H2AX foci after irradiation exposure. Importantly, cordycepin treatment down-regulated the expression levels of Nuclear factor erythroid 2-related factor (Nrf2) and a series of downstream genes, such as heme oxygenase-1 (HO-1), to enhance ROS in breast cancer cells exposed to irradiation. Together, our observations demonstrate that cordycepin treatment sensitizes breast carcinoma cells toward irradiation via Nrf2/HO-1/ROS axis. Thus, our findings provide novel insights into the function and the underlying mechanism of cordycepin in radiotherapy, and suggest that cordycepin might be employed as a radiosensitizer during radiotherapy toward breast cancer in a pre-clinical setting.
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Affiliation(s)
- Jiali Dong
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Yuan Li
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Huiwen Xiao
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Dan Luo
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Shuqin Zhang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Changchun Zhu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Mian Jiang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Ming Cui
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
| | - Lu Lu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
| | - Saijun Fan
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
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108
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Polysaccharide FMP-1 from Morchella esculenta attenuates cellular oxidative damage in human alveolar epithelial A549 cells through PI3K/AKT/Nrf2/HO-1 pathway. Int J Biol Macromol 2018; 120:865-875. [DOI: 10.1016/j.ijbiomac.2018.08.148] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 07/11/2018] [Accepted: 08/26/2018] [Indexed: 12/12/2022]
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109
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Jiang ZY, Lu MC, You QD. Nuclear Factor Erythroid 2-Related Factor 2 (Nrf2) Inhibition: An Emerging Strategy in Cancer Therapy. J Med Chem 2018; 62:3840-3856. [PMID: 30444366 DOI: 10.1021/acs.jmedchem.8b01121] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nuclear factor erythroid 2-related factor 2 (Nrf2) is a pleiotropic transcription factor, especially for its complex and dual effects in cancer. With the continuous growing research, new regulatory modes and new functions of Nrf2 and tumor-promoting effects of Nrf2 in malignant transformed tumors have become increasingly clear. Accumulating evidence has established that Nrf2 contributes to the whole process of pathogenesis, progression, metastasis, and prognosis of cancer, and Nrf2 could be a promising target in cancer therapy. However, the development of Nrf2 inhibitor is still limited. In this perspective, we will briefly describe the biological function and modulating network of Nrf2, stress its oncogenic role, and point out possible ways to inhibit Nrf2, as well as summarize the reported Nrf2 inhibitors.
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Affiliation(s)
- Zheng-Yu Jiang
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
| | - Meng-Chen Lu
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
| | - Qi-Dong You
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
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110
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Liu H, Feng Y, Xu M, Yang J, Wang Z, Di G. Four-octyl itaconate activates Keap1-Nrf2 signaling to protect neuronal cells from hydrogen peroxide. Cell Commun Signal 2018; 16:81. [PMID: 30442144 PMCID: PMC6238317 DOI: 10.1186/s12964-018-0294-2] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/05/2018] [Indexed: 12/16/2022] Open
Abstract
Background Four-octyl itaconate (OI), the itaconate’s cell-permeable derivative, can activate Nrf2 signaling via alkylation of Keap1 at its cysteine residues. The current study tested the potential neuroprotective function of OI in hydrogen peroxide (H2O2)-treated neuronal cells. Methods SH-SY5Y neuronal cells and epigenetically de-repressed (by TSA treatment) primary murine neurons were treated with OI and/or H2O2. Nrf2 pathway genes were examined by Western blotting assay and real-time quantitative PCR analysis. Neuronal cell death was tested by the LDH and trypan blue staining assays. Apoptosis was tested by TUNEL and Annexin V assays. Results In SH-SY5Y neuronal cells and primary murine neurons, OI activated Nrf2 signaling, causing Keap1-Nrf2 disassociation, Nrf2 protein stabilization and nuclear translocation, as well as expression of Nrf2-regulated genes (HO1, NQO1 and GCLC) and ninjurin2 (Ninj2). Functional studies showed that OI attenuated H2O2-induced reactive oxygen species (ROS) production, lipid peroxidation and DNA damage as well as neuronal cell death and apoptosis. shRNA-mediated knockdown, or CRISPR/Cas9-induced knockout of Nrf2 almost abolished OI-induced neuroprotection against H2O2. Keap1 is the primary target of OI. Keap1 knockout by CRISPR/Cas9 method mimicked and abolished OI-induced actions in SH-SY5Y cells. Introduction of a Cys151S mutant Keap1 in SH-SY5Y cells reversed OI-induced Nrf2 activation and anti-H2O2 neuroprotection. Conclusions OI activates Keap1-Nrf2 signaling to protect SH-SY5Y cells and epigenetically de-repressed primary neurons from H2O2 in vitro. Electronic supplementary material The online version of this article (10.1186/s12964-018-0294-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hua Liu
- Department of Neurosurgery, The First People's Hospital of Kunshan, Jiangsu University, Suzhou, China
| | - Yu Feng
- Department of Endocrinology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Min Xu
- Department of Neurosurgery, Kunshan Hospital of Traditional Chinese Medicine, Kunshan Affiliated Hospital, Suzhou, China
| | - Jian Yang
- Department of Neurosurgery, The First People's Hospital of Kunshan, Jiangsu University, Suzhou, China
| | - Zhichun Wang
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Wuhu, China
| | - Guangfu Di
- Department of Neurosurgery, Yijishan Hospital, Wannan Medical College, Wuhu, China.
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111
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Bellezza I. Oxidative Stress in Age-Related Macular Degeneration: Nrf2 as Therapeutic Target. Front Pharmacol 2018; 9:1280. [PMID: 30455645 PMCID: PMC6230566 DOI: 10.3389/fphar.2018.01280] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 10/18/2018] [Indexed: 01/07/2023] Open
Abstract
Age-related macular degeneration is one of the leading causes of vision loss in the elderly. Genetics, environmental insults, and age-related issues are risk factors for the development of the disease. All these risk factors are linked to the induction of oxidative stress. In young subjects retinal pigment epithelial cells mitigate reactive oxygen generation by the elimination of dysfunctional mitochondria, via mitophagy, and by increasing antioxidant defenses via Nrf2 activation. The high amount of UV light absorbed by the retina, together with cigarette smoking, cooperate with the aging process to increase the amount of reactive oxygen species generated by retinal pigment epithelium where oxidative stress arises. Moreover, in the elderly both the mitophagic process and Nrf2 activation are impaired thus causing retinal cell death. This review will focus on the impact of oxidative stress on the pathogenesis of age-related macular degeneration and analyze the natural and synthetic Nrf2-activating compounds that have been tested as potential therapeutic agents for the disease.
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Affiliation(s)
- Ilaria Bellezza
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
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112
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Li XF, Li SY, Dai CM, Li JC, Huang DR, Wang JY. PP2A inhibition by LB-100 protects retinal pigment epithelium cells from UV radiation via activation of AMPK signaling. Biochem Biophys Res Commun 2018; 506:73-80. [PMID: 30340831 DOI: 10.1016/j.bbrc.2018.10.077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 10/13/2018] [Indexed: 12/21/2022]
Abstract
AMP-activated protein kinase (AMPK) signaling activation can inhibit Ultra-violet (UV) radiation (UVR)-induced retinal pigment epithelium (RPE) cell injuries. LB-100 is a novel inhibitor of protein phosphatase 2A (PP2A), the AMPKα1 phosphatase. Here, our results demonstrated that LB-100 significantly inhibited UVR-induced viability reduction, cell death and apoptosis in established ARPE-19 cells and primary murine RPE cells. LB-100 activated AMPK, nicotinamide adenine dinucleotide phosphate (NADPH) and Nrf2 (NF-E2-related factor 2) signalings, inhibiting UVR-induced oxidative injuries and DNA damage in RPE cells. Conversely, AMPK inhibition, by AMPKα1-shRNA, -CRISPR/Cas9 knockout or -T172A mutation, almost blocked LB-100-induced RPE cytoprotection against UVR. Importantly, CRISPR/Cas9-mediated PP2A knockout mimicked and nullified LB-100-induced anti-UVR activity in RPE cells. Collectively, these results show that PP2A inhibition by LB-100 protects RPE cells from UVR via activation of AMPK signaling.
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Affiliation(s)
- Xiao-Feng Li
- Department of Ophthalmology, The Affiliated Huai'an NO.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Shu-Yan Li
- Department of Ophthalmology, The Affiliated Huai'an NO.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Chang-Ming Dai
- Department of Ophthalmology, The Affiliated Huai'an NO.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Jian-Chang Li
- Department of Ophthalmology, The Affiliated Huai'an NO.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Da-Rui Huang
- Department of Ophthalmology, The Affiliated Huai'an NO.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Jun-Ying Wang
- Department of ENT, The Affiliated Huai'an NO.1 People's Hospital of Nanjing Medical University, Huai'an, China.
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113
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Garza-Lombó C, Petrosyan P, Tapia-Rodríguez M, Valdovinos-Flores C, Gonsebatt ME. Systemic L-buthionine-S-R-sulfoximine administration modulates glutathione homeostasis via NGF/TrkA and mTOR signaling in the cerebellum. Neurochem Int 2018; 121:8-18. [PMID: 30300680 DOI: 10.1016/j.neuint.2018.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 10/02/2018] [Accepted: 10/03/2018] [Indexed: 12/11/2022]
Abstract
Glutathione (GSH) is an essential component of intracellular antioxidant systems that plays a primordial role in the protection of cells against oxidative stress, maintaining redox homeostasis and xenobiotic detoxification. GSH synthesis in the brain is limited by the availability of cysteine and glutamate. Cystine, the disulfide form of cysteine is transported into endothelial cells of the blood-brain barrier (BBB) and astrocytes via the system xc-, which is composed of xCT and the heavy chain of 4F2 cell surface antigen (4F2hc). Cystine is reduced inside the cells and the L-type amino acid transporter 1 (LAT1) transports cysteine from the endothelial cells into the brain, cysteine is transported into the neurons through the excitatory amino acid transporter 3 (EAAT3), also known as excitatory amino acid carrier 1 (EAAC1). The mechanistic/mammalian target of rapamycin (mTOR) and neurotrophins can activate signaling pathways that modulate amino acid transporters for GSH synthesis. The present study found that systemic L-buthionine-S-R-sulfoximine (BSO) administration selectively altered GSH homeostasis and EAAT3 levels in the mice cerebellum. Intraperitoneal treatment of mice with 6 mmol/kg of BSO depleted GSH and GSSG in the liver at 2 h of treatment. The cerebellum, but not other brain regions, exhibited a redox response. The mTOR and the neuronal growth factor (NGF)/tropomyosin receptor kinase A (TrkA) signaling pathways were activated and lead to an increase in the protein levels of the EAAT3 transporter, which was linked to an increase in the GSH/GSSG ratio and GSH concentration in the cerebellum at 0.5 and 2 h, respectively. Therefore, the cerebellum responds to peripheral GSH depletion via activation of the mTOR and NGF/TrkA pathways, which increase the transport of cysteine for GSH synthesis.
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Affiliation(s)
- Carla Garza-Lombó
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico.
| | - Pavel Petrosyan
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico.
| | - Miguel Tapia-Rodríguez
- Unidad de Microscopía, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico.
| | - Cesar Valdovinos-Flores
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico.
| | - María E Gonsebatt
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico.
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114
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Hu X, Liang Y, Zhao B, Wang Y. Thymoquinone protects human retinal pigment epithelial cells against hydrogen peroxide induced oxidative stress and apoptosis. J Cell Biochem 2018; 120:4514-4522. [PMID: 30269355 DOI: 10.1002/jcb.27739] [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: 06/04/2018] [Accepted: 09/30/2018] [Indexed: 01/22/2023]
Abstract
Oxidative stress in retinal pigment epithelium (RPE) cells may contribute to the progression of age-related macular degeneration. Thymoquinone (TQ), an active component derived from Nigella sativa, possesses antioxidative effect. However, the role of TQ in RPE cells under oxidative stress condition remains unclear. The present study aimed to examine the protective effect of TQ against hydrogen peroxide (H2 O2 )-induced oxidative stress in human RPE cells. Our results showed that TQ improved the cell viability and apoptosis in H2 O2 -induced ARPE cells. We also found that the levels of reactive oxygen species and malondialdehyde induced by H2 O2 were reduced after the pretreatment of TQ. In addition, the inhibitory effect of H2 O2 on the glutathione (GSH) level and superoxide dismutase activity was markedly attenuated by TQ pretreatment. Moreover, TQ enhanced the activation of Nrf2/heme oxygenase 1 (HO-1) signaling pathway in H2 O2 -induced ARPE cells. Knockdown of Nrf2 abolished the protective effect of TQ on H2 O2 -induced oxidative damage. These results suggested that TQ protected ARPE cells from H2 O2 -induced oxidative stress and apoptosis via the Nrf2/HO-1 signaling pathway.
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Affiliation(s)
- Xin Hu
- Department of Ophthalmology, Huaihe Hospital, Henan University, Kaifeng, China
| | - Yuanyuan Liang
- Department of Ophthalmology, Huaihe Hospital, Henan University, Kaifeng, China
| | - Bo Zhao
- Department of Ophthalmology, Huaihe Hospital, Henan University, Kaifeng, China
| | - Yongyi Wang
- Department of Ophthalmology, Huaihe Hospital, Henan University, Kaifeng, China
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115
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NKILA inhibition protects retinal pigment epithelium cells from hypoxia by facilitating NFκB activation. Biochem Biophys Res Commun 2018; 503:3134-3141. [PMID: 30144973 DOI: 10.1016/j.bbrc.2018.08.105] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 08/16/2018] [Indexed: 01/08/2023]
Abstract
Sustained retinal hypoxia causes injuries to retinal pigment epithelium (RPE) cells. We studied expression and potential functions of nuclear factor-κB (NFκB) Interacting LncRNA (NKILA) in hypoxia-treated RPE cells. Hypoxia induced NKILA expression, NKILA-IκBα association and NFκB activation in ARPE-19 cells and primary human RPE cells. shRNA-mediated knockdown of NKILA facilitated NFκB activation, inhibiting RPE cell death and apoptosis. Conversely, exogenous overexpression of NKILA blocked hypoxia-induced NFκB activation, thereby exacerbating RPE cell apoptosis. Further studies show that hypoxia downregulated microRNA-103 (miR-103), the anti-NKILA microRNA, in RPE cells. Transfection of miR-103 mimic blocked hypoxia-induced NKILA expression to significantly boost NFκB activation, protecting RPE cells from hypoxia. Collectively, we conclude that hypoxia-induced NKILA expression negatively regulates NFκB to promote RPE cell death. Conversely, NKILA inhibition protects RPE cells from hypoxia by facilitating NFκB activation.
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116
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Song Y, Liu W, Ding Y, Jia Y, Zhao J, Wang F, Bai J, Cheng L, Gao K, Liu M, Yao M, Li L, Zhang Y, Wen A, He L. Salvianolic acid A ameliorates renal ischemia/reperfusion injury by activating Akt/mTOR/4EBP1 signaling pathway. Am J Physiol Renal Physiol 2018; 315:F254-F262. [PMID: 29384417 DOI: 10.1152/ajprenal.00508.2017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Salvianolic acid A (Sal A) has been shown to prevent and treat ischemic cardiovascular, as well as cerebral vascular diseases. However, little is known about Sal A in renal ischemia/reperfusion (I/R) injury. In this study, a renal I/R injury model in rats and a hypoxia/reoxygenation (H/R) model to damage proximal renal tubular cells (HK-2) were used to assess whether Sal A halts the development and progression of renal I/R injury. As compared with vehicle treatment, Sal A significantly attenuated kidney injury after renal I/R injury, accompanied by decreases in plasma creatinine, blood urea nitrogen levels, the number of apoptosis-positive tubular cells, and kidney oxidative stress. Sal A also activated phosphorylated protein kinase B (p-Akt) and phosphorylated-mammalian target of rapamycin (p-mTOR) compared with vehicle-treated I/R injury rats. In H/R-injured HK-2 cells, Sal A can reduce the levels of reactive oxygen species in a dose-related manner. Similar to the results from in vivo experiments, in vitro Sal A also increased the protein expression of phosphorylated-eukaryotic initiation factor 4E binding protein 1 (p-4EBP1) compared with vehicle. Furthermore, the cytoprotective activity of Sal A was inhibited by LY294002 and rapamycin. These findings indicate that Sal A can ameliorate renal I/R injury and promote tubular cell survival partly via the Akt/mTOR/4EBP1pathway. Sal A could be a candidate compound to prevent ischemic tissue damage.
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Affiliation(s)
- Ying Song
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, Shaanxi, Peopleʼs Republic of China
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Weihai Liu
- Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang Shaanxi, China
| | - Yi Ding
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Yanyan Jia
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Jinyi Zhao
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Fan Wang
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Juan Bai
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Lianghua Cheng
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Kai Gao
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Meiyou Liu
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Minna Yao
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Liang Li
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Yanmin Zhang
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, Shaanxi, Peopleʼs Republic of China
| | - Aidong Wen
- Department of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi, Peopleʼs Republic of China
| | - Langchong He
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, Shaanxi, Peopleʼs Republic of China
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Li XM, Huang D, Yu Q, Yang J, Yao J. Neuroligin-3 protects retinal cells from H2O2-induced cell death via activation of Nrf2 signaling. Biochem Biophys Res Commun 2018; 502:166-172. [DOI: 10.1016/j.bbrc.2018.05.141] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 05/19/2018] [Indexed: 01/12/2023]
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118
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Therapeutic Potential of Salviae Miltiorrhizae Radix et Rhizoma against Human Diseases Based on Activation of Nrf2-Mediated Antioxidant Defense System: Bioactive Constituents and Mechanism of Action. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:7309073. [PMID: 30050659 PMCID: PMC6040253 DOI: 10.1155/2018/7309073] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 03/17/2018] [Accepted: 04/29/2018] [Indexed: 12/11/2022]
Abstract
Oxidative stress plays a central role in the pathogenesis of many human diseases. The nuclear factor erythroid 2-related factor 2 (Nrf2) is a key transcription factor regulating the intracellular antioxidant response and is an emerging target for the prevention and therapy of oxidative stress-related diseases. Salviae Miltiorrhizae Radix et Rhizoma (SMRR) is a traditional Chinese medicine (TCM) and is commonly used for the therapy of cardiac cerebral diseases. Cumulative evidences indicated that the extract of SMRR and its constituents, represented by lipophilic diterpenoid quinones and hydrophilic phenolic acids, were capable of activating Nrf2 and inhibiting oxidative stress. These bioactive constituents demonstrated a therapeutic potential against human diseases, exemplified by cardiovascular diseases, neurodegenerative diseases, diabetes, nephropathy, and inflammation, based on the induction of Nrf2-mediated antioxidant response and the inhibition of oxidative stress. In the present review, we introduced the SMRR and Nrf2 signaling pathway, summarized the constituents with an Nrf2-inducing effect isolated from SMRR, and discussed the molecular mechanism and pharmacological functions of the SMRR extract and its constituents.
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119
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Wang K, Yang Q, Ma Q, Wang B, Wan Z, Chen M, Wu L. Protective Effects of Salvianolic Acid A against Dextran Sodium Sulfate-Induced Acute Colitis in Rats. Nutrients 2018; 10:E791. [PMID: 29921812 PMCID: PMC6024375 DOI: 10.3390/nu10060791] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/09/2018] [Accepted: 06/14/2018] [Indexed: 12/23/2022] Open
Abstract
Salvianolic acid A (SAA) is an active phenolic acid derived from Salvia miltiorrhiza Bunge (Danshen). To explore whether SAA has a therapeutic effect against inflammatory bowel disease (IBD), an acute colitis model was induced in rats by administering 3% dextran sodium sulphate (DSS) for one week. SAA in doses of 4 and 8 mg/kg/day was given by tail vein injection during DSS administration. Both dosages of SAA ameliorated the colitis symptoms, with decreases observed in the disease activity index. A high dosage of SAA (8 mg/kg/day) promoted a longer colon length and an improved colonic tissue structure, compared with the DSS-treated rats not receiving SAA. SAA dose-dependently decreased colonic gene expression of pro-inflammatory cytokines (IL-1β, MCP-1 and IL-6). Moreover, a high dosage of SAA protected against DSS-induced damage to tight junctions (TJ) in the rats’ colons, by increasing TJ-related gene expression (ZO-1 and occuldin). Finally, using 16S rRNA phylogenetic sequencing, we found that SAA modulated gut microbiota imbalance during colitis by increasing the gut microbial diversity as well as selectively promoting some probiotic populations, including Akkermansia spp. Our study suggests that SAA is a promising candidate for the treatment of IBD.
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Affiliation(s)
- Kai Wang
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China.
| | - Qinqin Yang
- Zhejiang Institute of Traditional Chinese Medicine, Hangzhou 310007, China.
- Comparative medical Research Center, Zhejiang Chinese Medical University, Hangzhou 310053, China.
| | - Quanxin Ma
- Comparative medical Research Center, Zhejiang Chinese Medical University, Hangzhou 310053, China.
| | - Bei Wang
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China.
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Zhengrui Wan
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China.
| | - Minli Chen
- Comparative medical Research Center, Zhejiang Chinese Medical University, Hangzhou 310053, China.
| | - Liming Wu
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing 100093, China.
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120
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Li XF, Liu XM, Huang DR, Cao HJ, Wang JY. PF-06409577 activates AMPK signaling to protect retinal pigment epithelium cells from UV radiation. Biochem Biophys Res Commun 2018; 501:293-299. [DOI: 10.1016/j.bbrc.2018.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 05/02/2018] [Indexed: 01/01/2023]
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121
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Shi X, Liu HY, Li SP, Xu HB. Keratinocyte growth factor protects endometrial cells from oxygen glucose deprivation/re-oxygenation via activating Nrf2 signaling. Biochem Biophys Res Commun 2018; 501:178-185. [DOI: 10.1016/j.bbrc.2018.04.208] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 04/26/2018] [Indexed: 12/20/2022]
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122
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Li H, Tang Z, Chu P, Song Y, Yang Y, Sun B, Niu M, Qaed E, Shopit A, Han G, Ma X, Peng J, Hu M, Tang Z. Neuroprotective effect of phosphocreatine on oxidative stress and mitochondrial dysfunction induced apoptosis in vitro and in vivo: Involvement of dual PI3K/Akt and Nrf2/HO-1 pathways. Free Radic Biol Med 2018; 120:228-238. [PMID: 29559323 DOI: 10.1016/j.freeradbiomed.2018.03.014] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 03/03/2018] [Accepted: 03/09/2018] [Indexed: 12/15/2022]
Abstract
Methylglyoxal (MGO), an active metabolite of glucose, is observed in high levels in the tissues and blood of diabetic patients. Phosphocreatine (PCr), a high-energy phosphate compound, exhibits a range of pharmacological actions but little is well known of its neuroprotective action. The aim of the present study was to investigate the neuroprotective effects and the possible mechanisms of PCr. Diabetes is closely associated with neurodegenerative diseases, leading not only to the peripheral nervous system (PNS) and but also to central nervous system (CNS) damage. Therefore, we established two rat models of diabetes in vivo induced by MGO and streptozocin (STZ) respectively, while utilized differentiated PC-12 cells in vitro. Treatment of PC-12 cells with PCr markedly attenuated MGO-induced change of viability, apoptosis, accompanied by decreased levels of caspase-3, casapse-9 and Bcl-2/Bax protein ratio. Determination of cellular respiratory function was performed with intact PC-12 cells and homogenized hippocampal neuron tissue of rat. Reactive oxygen species (ROS) generation was assessed by membrane permeable fluorescent probe DCFH-DA. The expressions of Akt, Nrf2 and HO-1 were examined by Western blot. PCr pretreatment significantly reduced oxidative stress-induced high LDH, MDA level, and ROS production of PC-12 cells. PCr pretreatment also significantly decreased mitochondrial dysfunction in vitro and in vivo. In addition, PCr pretreatment increased the expression of p-Akt, Nrf2 and HO-1, and reduced the apoptosis. Moreover, the expression of Cleaved caspase3 was partially increased and the p-Akt, Nrf2 and HO-1 was partially reduced by a PI3K inhibitor (LY294002). While, compared with LY294002 groups, pre-treatment with PCr at the concentrations of 20 mM significantly reduced the expression of Cleaved caspase3 and increased the expression of p-Akt, Nrf2 and HO-1. Molecular docking assay showed that PCr possessed powerful affinity towards to Akt with lower binding energy. In conclusion, the neuroprotective effects of PCr in vitro and in vivo rely on normalizing mitochondrial function and reducing oxidative stress via Akt mediated Nrf2/HO-1 pathway, suggesting that PCr may be a novel therapeutic candidate for the treatment of diabetes-associated neurodegenerative diseases.
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Affiliation(s)
- Hailong Li
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Zhongyuan Tang
- Department of Orthodontics, School of Stomatology, Jilin University, 1500 Qinghua Road, Changchun 130021, PR China
| | - Peng Chu
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Yanlin Song
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Ying Yang
- Dalian Medical University, Affiliated Hosp 2, Neurological Intensive Care Un it, Dalian 116027, PR China
| | - Bin Sun
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Mengyue Niu
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Eskandar Qaed
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Abdullah Shopit
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Guozhu Han
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Xiaodong Ma
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Jinyong Peng
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China
| | - Min Hu
- Department of Orthodontics, School of Stomatology, Jilin University, 1500 Qinghua Road, Changchun 130021, PR China.
| | - Zeyao Tang
- Department of Pharmacology, Dalian Medical University, Dalian, Liaoning 116044, PR China.
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123
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Rodrigues NR, Macedo GE, Martins IK, Gomes KK, de Carvalho NR, Posser T, Franco JL. Short-term sleep deprivation with exposure to nocturnal light alters mitochondrial bioenergetics in Drosophila. Free Radic Biol Med 2018; 120:395-406. [PMID: 29655867 DOI: 10.1016/j.freeradbiomed.2018.04.549] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/26/2018] [Accepted: 04/11/2018] [Indexed: 02/07/2023]
Abstract
Many studies have shown the effects of sleep deprivation in several aspects of health and disease. However, little is known about how mitochondrial bioenergetics function is affected under this condition. To clarify this, we developed a simple model of short-term sleep deprivation, in which fruit-flies were submitted to a nocturnal light condition and then mitochondrial parameters were assessed by high resolution respirometry (HRR). Exposure of flies to constant light was able to alter sleep patterns, causing locomotor deficits, increasing ROS production and lipid peroxidation, affecting mitochondrial activity, antioxidant defense enzymes and caspase activity. HRR analysis showed that sleep deprivation affected mitochondrial bioenergetics capacity, decreasing respiration at oxidative phosphorylation (OXPHOS) and electron transport system (ETS). In addition, the expression of genes involved in the response to oxidative stress and apoptosis were increased. Thus, our results suggest a connection between sleep deprivation and oxidative stress, pointing to mitochondria as a possible target of this relationship.
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Affiliation(s)
- Nathane Rosa Rodrigues
- Oxidative Stress and Cell Signaling Research Group, Centro Interdisciplinar de Pesquisas em Biotecnologia - CIPBIOTEC, Universidade Federal do Pampa, Campus São Gabriel, RS, Brazil; Departamento de Bioquímica e Biologia Molecular, CCNE, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Giulianna Echeverria Macedo
- Oxidative Stress and Cell Signaling Research Group, Centro Interdisciplinar de Pesquisas em Biotecnologia - CIPBIOTEC, Universidade Federal do Pampa, Campus São Gabriel, RS, Brazil
| | - Illana Kemmerich Martins
- Oxidative Stress and Cell Signaling Research Group, Centro Interdisciplinar de Pesquisas em Biotecnologia - CIPBIOTEC, Universidade Federal do Pampa, Campus São Gabriel, RS, Brazil
| | - Karen Kich Gomes
- Oxidative Stress and Cell Signaling Research Group, Centro Interdisciplinar de Pesquisas em Biotecnologia - CIPBIOTEC, Universidade Federal do Pampa, Campus São Gabriel, RS, Brazil
| | - Nélson Rodrigues de Carvalho
- Oxidative Stress and Cell Signaling Research Group, Centro Interdisciplinar de Pesquisas em Biotecnologia - CIPBIOTEC, Universidade Federal do Pampa, Campus São Gabriel, RS, Brazil
| | - Thaís Posser
- Oxidative Stress and Cell Signaling Research Group, Centro Interdisciplinar de Pesquisas em Biotecnologia - CIPBIOTEC, Universidade Federal do Pampa, Campus São Gabriel, RS, Brazil
| | - Jeferson Luis Franco
- Oxidative Stress and Cell Signaling Research Group, Centro Interdisciplinar de Pesquisas em Biotecnologia - CIPBIOTEC, Universidade Federal do Pampa, Campus São Gabriel, RS, Brazil; Departamento de Bioquímica e Biologia Molecular, CCNE, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
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124
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Salvianolic acid A alleviates chronic ethanol-induced liver injury via promotion of β-catenin nuclear accumulation by restoring SIRT1 in rats. Toxicol Appl Pharmacol 2018; 350:21-31. [PMID: 29729281 DOI: 10.1016/j.taap.2018.04.036] [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: 12/16/2017] [Revised: 04/27/2018] [Accepted: 04/29/2018] [Indexed: 02/07/2023]
Abstract
In recent years, alcoholic liver disease (ALD) has emerged as a growing public health problem worldwide. β-catenin plays an important role in the growth, development, regeneration and metabolic activity of the liver. Salvianolic acid A (SalA) is a water-soluble component from the root extract of Salvia miltiorrhiza Bunge, and its effect on ALD has not yet been investigated. This study aimed to investigate the effect of SalA on chronic alcohol-induced liver injury and to explore the role of SIRT1-mediated β-catenin deacetylation in such an effect. In this study, SalA treatment significantly alleviated the accumulation of lipid droplets and reduced the plasma alanine aminotransferase (ALT), aspartate aminotransferase (AST), total cholesterol (TC), triglyceride (TG), alcohol and ammonia levels in rats. SalA enhanced ethanol and ammonia metabolism and maintained mitochondrial homeostasis. Moreover, SalA restored the activity of the major ethanol-metabolizing enzymes and oxidative stress functions in the liver. Importantly, we found that SalA treatment effectively inhibited the ethanol-mediated decrease in nuclear β-catenin by upregulating SIRT1 in the liver. SIRT1 then deacetylated β-catenin to promote its accumulation in the nucleus, thereby preventing alcohol-induced liver injury. The results demonstrate that the SIRT1/β-catenin pathway is a key therapeutic target in liver injury caused by chronic alcohol exposure and that SalA protects against alcohol-induced liver injury via the SIRT1-mediated deacetylation of β-catenin.
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125
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Liu L, Wu XW. Nobiletin protects human retinal pigment epithelial cells from hydrogen peroxide-induced oxidative damage. J Biochem Mol Toxicol 2018; 32:e22052. [PMID: 29687528 DOI: 10.1002/jbt.22052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 02/23/2018] [Accepted: 03/27/2018] [Indexed: 01/06/2023]
Abstract
Nobiletin (3',4',5,6,7,8-hexamethoxyflavone), a dietary polymethoxylated flavonoid found in Citrus fruits, has been reported to have antioxidant effect. However, the effect of nobiletin on human retinal pigment epithelium (RPE) cells induced by hydrogen peroxide (H2 O2 ) is still unclear. Therefore, we investigated the protective effect of nobiletin against H2 O2 -induced cell death in RPE cells. Our results demonstrated that nobiletin significantly increased cell viability from oxidative stress. Nobiletin inhibited H2 O2 -induced ROS production and caspase-3/7 activity in ARPE-19 cells. Furthermore, nobiletin significantly increased Akt phosphorylation in ARPE-19 cells exposed to H2 O2 . Meanwhile, LY294002, an inhibitor of PI3K/Akt, abolished the protective effect of nobiletin against H2 O2 -induced decreased cell viability and increased caspase-3/7 activity in ARPE-19 cells. In summary, these data show that nobiletin protects RPE cells against oxidative stress through activation of the Akt-signaling pathway. Thus, nobiletin should be an oxidant that attenuates the development of age-related macular degeneration.
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Affiliation(s)
- Libin Liu
- Department of Ophthalmology, Shanghai General Hospital of Nanjing Medical University, Shanghai, 200080, People's Republic of China.,Department of Ophthalmology, The Third People's Hospital of Jingdezhen, Jingdezhen, 333000, People's Republic of China
| | - Xing Wei Wu
- Department of Ophthalmology, Shanghai General Hospital of Nanjing Medical University, Shanghai, 200080, People's Republic of China
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126
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Gualou Guizhi Granule Protects Against Oxidative Injury by Activating Nrf2/ARE Pathway in Rats and PC12 Cells. Neurochem Res 2018; 43:1003-1009. [PMID: 29564698 DOI: 10.1007/s11064-018-2507-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 03/12/2018] [Accepted: 03/16/2018] [Indexed: 01/29/2023]
Abstract
Stroke involves numerous pathophysiological processes and oxidative stress is considered as a main cellular event in its pathogenesis. The nuclear factor erythroid-2-related factor 2 (Nrf2)/antioxidant response element (ARE) pathway plays a key role in inducing phase II detoxifying enzymes and antioxidant proteins and is now considered as a interesting therapeutic target for the treatment of stroke. The objective of this study is to investigate the protective effect of Gualou Guizhi granule (GLGZG) against oxidative stress and explore the protective mechanism of the Nrf2/ARE pathway. In vivo, administration of GLGZG in a rat model of focal cerebral ischemia significantly suppressed oxidative injury by increasing the activity of superoxide dismutase and glutathione level and decreasing reactive oxygen species and malondialdehyde levels. Western blot analysis showed that GLGZG induced nuclear translocation of Nrf2, and combined with real-time PCR results, which indicated that GLGZG up-regulated the Nrf2/ARE pathway. In addition, in cultured PC12 cells, GLGZG protected against H2O2 induced oxidative injury and activated the Nrf2/ARE pathway. All the results demonstrated that GLGZG in the management of cerebral ischemia and H2O2 induced oxidative injury may be associated with activation of Nrf2/ARE signaling pathway.
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127
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Liu YY, Chen MB, Cheng L, Zhang ZQ, Yu ZQ, Jiang Q, Chen G, Cao C. microRNA-200a downregulation in human glioma leads to Gαi1 over-expression, Akt activation, and cell proliferation. Oncogene 2018. [PMID: 29520106 DOI: 10.1038/s41388-018-0184-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We previously identified a pivotal role for G protein α inhibitory subunit 1 (Gαi1) in mediating PI3K-Akt signaling by receptor tyrosine kinases (RTKs). Here, we examined the expression and biological function of Gαi1 in human glioma. Gαi1 mRNA and protein expression were significantly upregulated in human glioma tissues, which correlated with downregulation of an anti-Gαi1 miRNA: microRNA-200a ("miR-200a"). Forced-expression of miR-200a in established (A172/U251MG lines) and primary (patient-derived) human glioma cells resulted in Gαi1 downregulation, Akt inactivation and proliferation inhibition. Reduction of Gαi1 expression by shRNA, dominant negative mutant interference, or complete Gαi1 depletion inhibited Akt activation and cell proliferation. Notably, miR-200a was unable to inhibit glioma cell proliferation when Gαi1 was silenced or mutated. Co-immunoprecipitation studies, in human glioma cells and tissues, show that Gαi1 forms a complex with multiple RTKs (EGFR, PDGFRα, and FGFR) and the adapter protein Gab1. In vivo, the growth of subcutaneous and orthotopic glioma xenografts in nude mice was largely inhibited by expression of Gαi1 shRNA or miRNA-200a. Collectively, miR-200a downregulation in human glioma leads to Gαi1 over-expression, Akt activation and glioma cell proliferation.
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Affiliation(s)
- Yuan-Yuan Liu
- Clinical Research and Lab Center, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, China.,Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Min-Bin Chen
- Department of Radiotherapy and Oncology, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, China
| | - Long Cheng
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China.,Department of Interventional Radiology, The Second Affiliated Hospital of Soochow University, Soochow University, Suzhou, China
| | - Zhi-Qing Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China
| | - Zheng-Quan Yu
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Qin Jiang
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China.
| | - Gang Chen
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, China.
| | - Cong Cao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China. .,The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China. .,North District, The Municipal Hospital of Suzhou, Suzhou, China.
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128
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Cai S, Li Y, Bai JY, Zhang ZQ, Wang Y, Qiao YB, Zhou XZ, Yang B, Tian Y, Cao C. Gαi3 nuclear translocation causes irradiation resistance in human glioma cells. Oncotarget 2018; 8:35061-35068. [PMID: 28456783 PMCID: PMC5471034 DOI: 10.18632/oncotarget.17043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 03/30/2017] [Indexed: 12/27/2022] Open
Abstract
We have previously shown that Gαi3 is elevated in human glioma, mediating Akt activation and cancer cell proliferation. Here, we imply that Gαi3 could also be important for irradiation resistance. In A172 human glioma cells, Gαi3 knockdown (by targeted shRNAs) or dominant-negative mutation significantly potentiated irradiation-induced cell apoptosis. Reversely, forced over-expression of wild-type or constitutively-active Gαi3 inhibited irradiation-induced A172 cell apoptosis. Irradiation in A172 cells induced Gαi3 translocation to cell nuclei and association with local protein DNA-dependent protein kinase (DNA-PK) catalytic subunit. This association was important for DNA damage repair. Gαi3 knockdown, depletion (using Gαi3 knockout MEFs) or dominant-negative mutation potentiated irradiation-induced DNA damages. On the other hand, expression of the constitutively-active Gαi3 in A172 cells inhibited DNA damage by irradiation. Together, these results indicate a novel function of Gαi3 in irradiation-resistance in human glioma cells.
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Affiliation(s)
- Shang Cai
- Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Ya Li
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Jin-Yu Bai
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Zhi-Qing Zhang
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Yin Wang
- Institute of Neuroscience, Soochow University, Suzhou, China
| | - Yin-Biao Qiao
- Department of Surgery, The Third Hospital affiliated to Soochow University
| | - Xiao-Zhong Zhou
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Bo Yang
- Department of Surgery, The Third Hospital affiliated to Soochow University
| | - Ye Tian
- Department of Radiotherapy and Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Cong Cao
- Institute of Neuroscience, Soochow University, Suzhou, China
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129
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Ma XJ, Xing HZ, Ren GF, Rao XJ, Li ZZ. JIP3 knockout protects mice against high fat diet-induced liver injury. Biochem Biophys Res Commun 2018; 497:819-826. [DOI: 10.1016/j.bbrc.2018.01.178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 01/29/2018] [Indexed: 02/07/2023]
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130
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Dugbartey GJ, Redington AN. Prevention of contrast-induced nephropathy by limb ischemic preconditioning: underlying mechanisms and clinical effects. Am J Physiol Renal Physiol 2018; 314:F319-F328. [DOI: 10.1152/ajprenal.00130.2017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Contrast-induced nephropathy (CIN) is an important complication following diagnostic radiographic imaging and interventional therapy. It results from administration of intravascular iodinated contrast media (CM) and is currently the third most common cause of hospital-acquired acute kidney injury. CIN is associated with increased morbidity, prolonged hospitalization, and higher mortality. Although the importance of CIN is widely appreciated, and its occurrence can be mitigated by the use of pre- and posthydration protocols and low osmolar instead of high osmolar iodine-containing CM, specific prophylactic therapy is lacking. Remote ischemic preconditioning (RIPC), induced through short cycles of ischemia-reperfusion applied to the limb, is an intriguing new strategy that has been shown to reduce myocardial infarction size in patients undergoing emergency percutaneous coronary intervention. Furthermore, multiple proof-of-principle clinical studies have suggested benefit in several other ischemia-reperfusion syndromes, including stroke. Perhaps somewhat surprisingly, RIPC also is emerging as a promising strategy for CIN prevention. In this review, we discuss current clinical and experimental developments regarding the biology of CIN, concentrating on the pathophysiology of CIN, and cellular and molecular mechanisms by which limb ischemic preconditioning may confer renal protection in clinical and experimental models of CIN.
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Affiliation(s)
- George J. Dugbartey
- Division of Cardiology, The Heart Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
| | - Andrew N. Redington
- Division of Cardiology, The Heart Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
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131
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Tang CZ, Li KR, Yu Q, Jiang Q, Yao J, Cao C. Activation of Nrf2 by Ginsenoside Rh3 protects retinal pigment epithelium cells and retinal ganglion cells from UV. Free Radic Biol Med 2018; 117:238-246. [PMID: 29427790 DOI: 10.1016/j.freeradbiomed.2018.02.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/11/2018] [Accepted: 02/02/2018] [Indexed: 12/20/2022]
Abstract
Excessive Ultra-violet (UV) radiation shall induce damages to resident retinal pigment epithelium (RPE) cells (RPEs) and retinal ganglion cells (RGCs). Here we tested the potential activity of Ginsenoside Rh3 ("Rh3") against the process. In cultured human RPEs and RGCs, pretreatment with Rh3 inhibited UV-induced reactive oxygen species (ROS) production and following apoptotic/non-apoptotic cell death. Rh3 treatment in retinal cells induced nuclear-factor-E2-related factor 2 (Nrf2) activation, which was evidenced by Nrf2 protein stabilization and its nuclear translocation, along with transcription of antioxidant responsive element (ARE)-dependent genes (HO1, NOQ1 and GCLC). Nrf2 knockdown by targeted-shRNA almost abolished Rh3-induced retinal cell protection against UV. Further studies found that Rh3 induced microRNA-141 ("miR-141") expression, causing downregulation of its targeted gene Keap1 in RPEs and RGCs. On the other hand, Rh3-induced Nrf2 activation and retinal cell protection were largely attenuated by the miR-141's inhibitor, antagomiR-141. In vivo, intravitreal injection of Rh3 inhibited retinal dysfunction by light damage in mice. Rh3 intravitreal injection also induced miR-141 expression, Keap1 downregulation and Nrf2 activation in mouse retinas. We conclude that Rh3 protects retinal cells from UV via activating Nrf2 signaling.
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Affiliation(s)
- Chun-Zhou Tang
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China; Ophthalmology Department, Jiangsu Jiangyin people's Hospital, Jiangyin, China
| | - Ke-Ran Li
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China
| | - Qing Yu
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China
| | - Qin Jiang
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China.
| | - Jin Yao
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China.
| | - Cong Cao
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China; Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, China; Center of Translational Medicine, The First People Hospital of Zhangjiagang City, Soochow University, Suzhou, China; North District, The Municipal Hospital of Suzhou, Suzhou, China.
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132
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Xu Y, Gao YW, Yang Y. SC79 protects dopaminergic neurons from oxidative stress. Oncotarget 2018; 9:12639-12648. [PMID: 29560097 PMCID: PMC5849161 DOI: 10.18632/oncotarget.23538] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 12/01/2017] [Indexed: 01/08/2023] Open
Abstract
Oxidative stress could lead to dopaminergic neuronal cell death. SC79 is a novel, selective and highly-efficient Akt activator. The current study tested its effect in dopaminergic neurons with oxidative stress. In both SH-SY5Y cells and primary murine dopaminergic neurons, pre-treatment with SC79 largely inhibited hydrogen peroxide (H2O2)-induced cell viability reduction, apoptosis and necrosis. SC79 activated Akt in the neuronal cells, which was required for its neuroprotection against H2O2. Inhibition of Akt activation (by MK-2206 or AT7867) or expression (by targeted short hairpin RNA) largely attenuated SC79-induced neuroprotection. Further, CRISPR-Cas9-mediated Akt1 knockout in SH-SY5Y cells abolished SC79-induced neuroprotective function against H2O2. Reversely, forced activation of Akt by the constitutively-active Akt1 mimicked SC79-induced anti-H2O2 activity. Together, we conclude that activation of Akt by SC79 protects dopaminergic neurons from H2O2.
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Affiliation(s)
- Yan Xu
- Geriatrics Department, The Second Xiang Ya Hospital of Central South University, Changsha, China
| | - Ya-Wen Gao
- Geriatrics Department, The Second Xiang Ya Hospital of Central South University, Changsha, China
| | - Yu Yang
- Geriatrics Department, The Second Xiang Ya Hospital of Central South University, Changsha, China
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133
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Liu W, Mao L, Ji F, Chen F, Wang S, Xie Y. Icariside II activates EGFR-Akt-Nrf2 signaling and protects osteoblasts from dexamethasone. Oncotarget 2018; 8:2594-2603. [PMID: 27911877 PMCID: PMC5356826 DOI: 10.18632/oncotarget.13732] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 11/21/2016] [Indexed: 12/22/2022] Open
Abstract
The potential effect of icariside II on dexamethasone-induced osteoblast cell damages was evaluated here. In MC3T3-E1 osteoblastic cells and the primary murine osteoblasts, co-treatment with icariside II dramatically attenuated dexamethasone- induced cell death and apoptosis. Icariside II activated Akt signaling, which is required for its actions in osteoblasts. Akt inhibitors (LY294002, perifosine and MK-2206) almost abolished icariside II-induced osteoblast cytoprotection against dexamethasone. Further studies showed that icariside II activated Nrf2 signaling, downstream of Akt, to inhibit dexamethasone-induced reactive oxygen species (ROS) production in MC3T3-E1 cells and primary osteoblasts. On the other hand, Nrf2 shRNA knockdown inhibited icariside II-induced anti-dexamethasone cytoprotection in MC3T3-E1 cells. Finally, we showed that icariside II induced heparin-binding EGF (HB-EGF) production and EGFR trans-activation in MC3T3-E1 cells. EGFR inhibition, via anti-HB-EGF antibody, EGFR inhibitor AG1478 or EGFR shRNA knockdown, almost blocked icariside II-induced Akt-Nrf2 activation in MC3T3-E1 cells. Collectively, we conclude that icariside II activates EGFR-Akt-Nrf2 signaling and protects osteoblasts from dexamethasone. Icariside II might have translational value for the treatment of dexamethasone-associated osteoporosis/osteonecrosis.
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Affiliation(s)
- Weidong Liu
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Li Mao
- Department of Endocrinology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Feng Ji
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Fengli Chen
- Clinical Laboratory, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Shouguo Wang
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Yue Xie
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
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134
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Zhang XP, Li KR, Yu Q, Yao MD, Ge HM, Li XM, Jiang Q, Yao J, Cao C. Ginsenoside Rh2 inhibits vascular endothelial growth factor-induced corneal neovascularization. FASEB J 2018; 32:3782-3791. [PMID: 29465315 DOI: 10.1096/fj.201701074rr] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
VEGF-induced neovascularization plays a pivotal role in corneal neovascularization (CoNV). The current study investigated the potential effect of ginsenoside Rh2 (GRh2) on neovascularization. In HUVECs, pretreatment with GRh2 largely attenuated VEGF-induced cell proliferation, migration, and vessel-like tube formation in vitro. At the molecular level, GRh2 disrupted VEGF-induced VEGF receptor 2 (VEGFR2)-Grb-2-associated binder 1 (Gab1) association in HUVECs, causing inactivation of downstream AKT and ERK signaling. Gab1 knockdown (by targeted short hairpin RNA) similarly inhibited HUVEC proliferation and migration. Notably, GRh2 was ineffective against VEGF in Gab1-silenced HUVECs. In a mouse cornea alkali burn model, GRh2 eyedrops inhibited alkali-induced neovascularization and inflammatory cell infiltrations in the cornea. Furthermore, alkali-induced corneal expression of mRNAs/long noncoding RNAs in cornea were largely attenuated by GRh2. Overall, GRh2 inhibits VEGF-induced angiogenic effect via inhibiting VEGFR2-Gab1 signaling in vitro. It also alleviates angiogenic and inflammatory responses in alkali burn-treated mouse corneas.-Zhang, X.-P., Li, K.-R., Yu, Q., Yao, M.-D., Ge, H.-M., Li, X.-M., Jiang, Q., Yao, J., Cao, C. Ginsenoside Rh2 inhibits vascular endothelial growth factor-induced corneal neovascularization.
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Affiliation(s)
- Xiao-Pei Zhang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Ke-Ran Li
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Qing Yu
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Mu-Di Yao
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Hui-Min Ge
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Xiu-Miao Li
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Qin Jiang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Jin Yao
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Cong Cao
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China.,Jiangsu Key Laboratory of Neuropsychiatric Diseases Research and Institute of Neuroscience, Soochow University, Suzhou, China; and.,North District, The Municipal Hospital of Suzhou, Suzhou, China
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135
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Gong YQ, Huang W, Li KR, Liu YY, Cao GF, Cao C, Jiang Q. SC79 protects retinal pigment epithelium cells from UV radiation via activating Akt-Nrf2 signaling. Oncotarget 2018; 7:60123-60132. [PMID: 27517753 PMCID: PMC5312373 DOI: 10.18632/oncotarget.11164] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 07/20/2016] [Indexed: 12/11/2022] Open
Abstract
Excessive Ultra-violet (UV) radiation causes oxidative damages and apoptosis in retinal pigment epithelium (RPE) cells. Here we tested the potential activity of SC79, a novel small molecule activator of Akt, against the process. We showed that SC79 activated Akt in primary and established (ARPE-19 line) RPE cells. It protected RPE cells from UV damages possibly via inhibiting cell apoptosis. Akt inhibition, via an Akt specific inhibitor (MK-2206) or Akt1 shRNA silence, almost abolished SC79-induced RPE cytoprotection. Further studies showed that SC79 activated Akt-dependent NF-E2-related factor 2 (Nrf2) signaling and inhibited UV-induced oxidative stress in RPE cells. Reversely, Nrf2 shRNA knockdown or S40T mutation attenuated SC79-induced anti-UV activity. For the in vivo studies, we showed that intravitreal injection of SC79 significantly protected mouse retina from light damages. Based on these results, we suggest that SC79 protects RPE cells from UV damages possibly via activating Akt-Nrf2 signaling axis.
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Affiliation(s)
- Yi-Qing Gong
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China.,Ophthalmology Department, Zhenjiang First People's Hospital, Zhenjiang, China
| | - Wei Huang
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China
| | - Ke-Ran Li
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China
| | - Yuan-Yuan Liu
- Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Guo-Fan Cao
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China
| | - Cong Cao
- Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Qin Jiang
- The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, China
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136
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Habtemariam S. Molecular Pharmacology of Rosmarinic and Salvianolic Acids: Potential Seeds for Alzheimer's and Vascular Dementia Drugs. Int J Mol Sci 2018; 19:E458. [PMID: 29401682 PMCID: PMC5855680 DOI: 10.3390/ijms19020458] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 01/31/2018] [Accepted: 02/01/2018] [Indexed: 12/20/2022] Open
Abstract
Both caffeic acid and 3,4-dihydroxyphenyllactic acid (danshensu) are synthesized through two distinct routs of the shikimic acid biosynthesis pathway. In many plants, especially the rosemary and sage family of Lamiaceae, these two compounds are joined through an ester linkage to form rosmarinic acid (RA). A further structural diversity of RA derivatives in some plants such as Salvia miltiorrhiza Bunge is a form of RA dimer, salvianolic acid-B (SA-B), that further give rise to diverse salvianolic acid derivatives. This review provides a comprehensive perspective on the chemistry and pharmacology of these compounds related to their potential therapeutic applications to dementia. The two common causes of dementia, Alzheimer's disease (AD) and stroke, are employed to scrutinize the effects of these compounds in vitro and in animal models of dementia. Key pharmacological mechanisms beyond the common antioxidant and anti-inflammatory effects of polyphenols are highlighted with emphasis given to amyloid beta (Aβ) pathologies among others and neuronal regeneration from stem cells.
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Affiliation(s)
- Solomon Habtemariam
- Pharmacognosy Research Laboratories & Herbal Analysis Services, University of Greenwich, Central Avenue, Chatham-Maritime, Kent ME4 4TB, UK.
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137
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Hu H, Hao L, Tang C, Zhu Y, Jiang Q, Yao J. Activation of KGFR-Akt-mTOR-Nrf2 signaling protects human retinal pigment epithelium cells from Ultra-violet. Biochem Biophys Res Commun 2018; 495:2171-2177. [DOI: 10.1016/j.bbrc.2017.12.078] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 12/14/2017] [Indexed: 11/24/2022]
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138
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Zeng R, Zhang R, Song X, Ni L, Lai Z, Liu C, Ye W. The long non-coding RNA MALAT1 activates Nrf2 signaling to protect human umbilical vein endothelial cells from hydrogen peroxide. Biochem Biophys Res Commun 2017; 495:2532-2538. [PMID: 29274336 DOI: 10.1016/j.bbrc.2017.12.105] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 12/19/2017] [Indexed: 12/13/2022]
Abstract
The potential effect of the long non-coding RNA (lncRNA) metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) against hydrogen peroxide (H2O2)-induced oxidative injury in endothelial cells was tested. We show that forced-expression of MALAT1 using a lentiviral vector ("LV-MALAT1") significantly attenuated H2O2-induced death and apoptosis of human umbilical vein endothelial cells (HUVECs). Conversely, knocking down of MALAT1 by targeted siRNA exacerbated H2O2-induced HUVEC injury. For the mechanism study, we show that LV-MALAT1 induced Keap1 downregulation, leading to nuclear-factor-E2-related factor 2 (Nrf2) stabilization and activation. Critically, Nrf2 shRNA almost completely abolished LV-MALAT1-mediated HUVEC protection against H2O2. Significantly, H2O2-induced oxidative stress, lipid peroxidation and DNA damages in HUVECs were attenuated by LV-MALAT1, but were intensified with MALAT1 siRNA. In summary, we identified a novel signaling axis involving MALAT1, Keap1 and Nrf2, which in turn protects HUVECs from oxidative injury.
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Affiliation(s)
- Rong Zeng
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Rui Zhang
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xitao Song
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Leng Ni
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Zhichao Lai
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Changwei Liu
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Wei Ye
- Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
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139
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Liu G, Chen FL, Ji F, Fei HD, Xie Y, Wang SG. microRNA-19a protects osteoblasts from dexamethasone via targeting TSC1. Oncotarget 2017; 9:2017-2027. [PMID: 29416749 PMCID: PMC5788617 DOI: 10.18632/oncotarget.23326] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 12/08/2017] [Indexed: 11/25/2022] Open
Abstract
Activation of mTOR complex 1 (mTORC1) could protect human osteoblasts from dexamethasone. Tuberous sclerosis complex 1 (TSC1) is mTORC1 upstream inhibitory protein. We demonstrate here that microRNA-19a (“miR-19a”, -3p) targets the 3' untranslated regions of TSC1 mRNA. Expression of miR-19a downregulated TSC1 in OB-6 osteoblastic cells and primary human osteoblasts. miR-19a activated mTORC1 and protected human osteoblasts from dexamethasone. mTORC1 inhibition, by RAD001 or Raptor shRNA, almost completely abolished miR-19a-induced osteoblast cytoprotection against dexamethasone. Knockdown of TSC1 by targeted shRNA similarly induced mTORC1 activation and protected osteoblasts. Moreover, miR-19a activated mTORC1-dependent NF-E2-related factor 2 (Nrf2) signaling and inhibited dexamethasone-induced reactive oxygen species production in osteoblasts. Together, miR-19a protects human osteoblasts from dexamethasone possibly via targeting TSC1-mTORC1 signaling.
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Affiliation(s)
- Gang Liu
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Feng-Li Chen
- Clinical Laboratory, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Feng Ji
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Hao-Dong Fei
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Yue Xie
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Shou-Guo Wang
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
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140
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Wang Y, Wu Y, Wang B, Cao X, Fu A, Li Y, Li W. Effects of probiotic Bacillus as a substitute for antibiotics on antioxidant capacity and intestinal autophagy of piglets. AMB Express 2017; 7:52. [PMID: 28244029 PMCID: PMC5328899 DOI: 10.1186/s13568-017-0353-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 02/21/2017] [Indexed: 12/26/2022] Open
Abstract
The objective of this study was to evaluate effects of probiotic Bacillus amyloliquefaciens (Ba) as a substitute for antibiotics on growth performance, antioxidant ability and intestinal autophagy of piglets. Ninety piglets were divided into three groups: G1 (containing 150 mg/Kg aureomycin in the diet); G2 (containing 75 mg/Kg aureomycin and 1 × 108 cfu/Kg Ba in the diet); G3 (containing 2 × 108 cfu/Kg Ba in the diet without any antibiotics). Each treatment had three replications of ten pigs per pen. Results showed that Ba replacement significantly increased the daily weight gain of piglets. Moreover, improved antioxidant status in serum and jejunum was noted in Ba-fed groups as compared with aureomycin group. Increased gene expression of antioxidant enzymes and elevated nuclear factor erythroid 2 related factor 2 (Nrf2) in jejunum was also observed in Ba-fed groups. Besides, Ba replacement significantly decreased jejunal c-Jun N-terminal kinase (JNK) phosphorylation compared with antibiotic group. Western blotting results also revealed that replacing all antibiotics with Ba initiated autophagy in the jejunum as evidenced by increased microtubule-associated protein 1 light chain 3 II (LC3-II) abundance. Taken together, these results indicate that replacing aureomycin with Ba can improve growth performance and antioxidant status of piglets via increasing antioxidant capacity and intestinal autophagy, suggesting a good potential for Ba as an alternative to antibiotics in feed.
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141
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Ali T, Kim T, Rehman SU, Khan MS, Amin FU, Khan M, Ikram M, Kim MO. Natural Dietary Supplementation of Anthocyanins via PI3K/Akt/Nrf2/HO-1 Pathways Mitigate Oxidative Stress, Neurodegeneration, and Memory Impairment in a Mouse Model of Alzheimer's Disease. Mol Neurobiol 2017; 55:6076-6093. [PMID: 29170981 DOI: 10.1007/s12035-017-0798-6] [Citation(s) in RCA: 297] [Impact Index Per Article: 42.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 10/05/2017] [Indexed: 01/11/2023]
Abstract
Well-established studies have shown an elevated level of reactive oxygen species (ROS) that induces oxidative stress in the Alzheimer's disease (AD) patient's brain and an animal model of AD. Herein, we investigated the underlying anti-oxidant neuroprotective mechanism of natural dietary supplementation of anthocyanins extracted from Korean black beans in the amyloid precursor protein/presenilin-1 (APP/PS1) mouse model of AD. Both in vivo (APP/PS1 mice) and in vitro (mouse hippocampal HT22 cells) results demonstrated that anthocyanins regulate the phosphorylated-phosphatidylinositol 3-kinase-Akt-glycogen synthase kinase 3 beta (p-PI3K/Akt/GSK3β) pathways and consequently attenuate amyloid beta oligomer (AβO)-induced elevations in ROS level and oxidative stress via stimulating the master endogenous anti-oxidant system of nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (Nrf2/HO-1) pathways and prevent apoptosis and neurodegeneration by suppressing the apoptotic and neurodegenerative markers such as activation of caspase-3 and PARP-1 expression as well as the TUNEL and Fluoro-Jade B-positive neuronal cells in the APP/PS1 mice. In vitro ApoTox-Glo™ Triplex assay results also showed that anthocyanins act as a potent anti-oxidant neuroprotective agent and reduce AβO-induced neurotoxicity in the HT22 cells via PI3K/Akt/Nrf2 signaling. Importantly, anthocyanins improve memory-related pre- and postsynaptic protein markers and memory functions in the APP/PS1 mice. In conclusion, our data suggested that consumption and supplementation of natural-derived anti-oxidant neuroprotective agent such as anthocyanins may be beneficial and suggest new dietary-supplement strategies for intervention in and prevention of progressive neurodegenerative diseases, such as AD.
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Affiliation(s)
- Tahir Ali
- Division of Life Science and Applied Life Science (BK 21), College of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Taehyun Kim
- Division of Life Science and Applied Life Science (BK 21), College of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Shafiq Ur Rehman
- Division of Life Science and Applied Life Science (BK 21), College of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Muhammad Sohail Khan
- Division of Life Science and Applied Life Science (BK 21), College of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Faiz Ul Amin
- Division of Life Science and Applied Life Science (BK 21), College of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Mehtab Khan
- Division of Life Science and Applied Life Science (BK 21), College of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Muhammad Ikram
- Division of Life Science and Applied Life Science (BK 21), College of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea
| | - Myeong Ok Kim
- Division of Life Science and Applied Life Science (BK 21), College of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea.
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142
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Xu YY, Chen FL, Ji F, Fei HD, Xie Y, Wang SG. Activation of AMP-activated protein kinase by compound 991 protects osteoblasts from dexamethasone. Biochem Biophys Res Commun 2017; 495:1014-1021. [PMID: 29175330 DOI: 10.1016/j.bbrc.2017.11.132] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 11/19/2017] [Indexed: 12/20/2022]
Abstract
Dexamethasone (Dex) induces direct cytotoxicity to cultured osteoblasts. The benzimidazole derivative compound 991 ("C991") is a novel and highly-efficient AMP-activated protein kinase (AMPK) activator. Here, in both MC3T3-E1 osteoblastic cells and primary murine osteoblasts, treatment with C991 activated AMPK signaling, and significantly attenuated Dex-induced apoptotic and non-apoptotic cell death. AMPKα1 knockdown (by shRNA), complete knockout (by CRISPR/Cas9 method) or dominant negative mutation (T172A) not only blocked C991-mediated AMPK activation, but also abolished its pro-survival effect against Dex in osteoblasts. Further studies showed that C991 boosted nicotinamide adenine dinucleotide phosphate (NADPH) activity and induced mRNA expression of NF-E2-related factor 2 (Nrf2)-regulated genes (heme oxygenase-1 and NADPH quinone oxidoreductase 1). Additionally, C991 alleviated Dex-induced reactive oxygen species (ROS) production in osteoblasts. Notably, genetic AMPK inhibition reversed the anti-oxidant actions by C991 in Dex-treated osteoblasts. Together, we conclude that C991 activates AMPK signaling to protect osteoblasts from Dex.
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Affiliation(s)
- Yong-Yi Xu
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Feng-Li Chen
- Clinical Laboratory, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Feng Ji
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China.
| | - Hao-Dong Fei
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Yue Xie
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Shou-Guo Wang
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China.
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143
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Guo S, Fei HD, Ji F, Chen FL, Xie Y, Wang SG. Activation of Nrf2 by MIND4-17 protects osteoblasts from hydrogen peroxide-induced oxidative stress. Oncotarget 2017; 8:105662-105672. [PMID: 29285281 PMCID: PMC5739668 DOI: 10.18632/oncotarget.22360] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 10/14/2017] [Indexed: 12/29/2022] Open
Abstract
MIND4-17 is a recently developed NF-E2-related factor 2 (Nrf2) activator, which uniquely causes Nrf2 disassociation from Keap1. Here, we showed that pretreatment with MIND4-17 significantly inhibited hydrogen peroxide (H2O2)-induced viability reduction of primary osteoblasts and OB-6 osteoblastic cells. Meanwhile, MIND4-17 inhibited both apoptotic and non-apoptotic osteoblast cell death by H2O2. MIND4-17 treatment induced Keap1-Nrf2 disassociation, causing Nrf2 stabilization, accumulation and nuclear translocation in osteoblasts, leading to transcription of several Nrf2-dependent genes, including heme oxygenase 1 (HO-1), NAD(P)H quinone oxidoreductase 1 (NQO1), γ-glutamylcysteine synthetase modifier subunit (GCLM) and catalytic subunit (GCLC). Additionally, MIND4-17 largely attenuated H2O2-reactive oxygen species (ROS) production, lipid peroxidation and DNA damages. Nrf2 knockdown by targeted short hairpin RNA (shRNA) exacerbated H2O2-induced cytotoxicity in OB-6 osteoblastic cells, and nullified MIND4-17-mediated cytoprotection against H2O2. Meanwhile, Keap1 shRNA took over MIND4-17′s actions and protected OB-6 cells from H2O2. Together, MIND4-17 activates Nrf2 signaling and protects osteoblasts from H2O2.
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Affiliation(s)
- Shiguang Guo
- Department of Intensive Care Unit, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Hao-Dong Fei
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Feng Ji
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Feng-Li Chen
- Clinical Laboratory, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Yue Xie
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Shou-Guo Wang
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
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144
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Teng MC, Wu PC, Lin SP, Wu CY, Wang PH, Chen CT, Chen BY. Danshensu Decreases UVB-Induced Corneal Inflammation in an Experimental Mouse Model via Oral Administration. Curr Eye Res 2017; 43:27-34. [DOI: 10.1080/02713683.2017.1379543] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Mei-Ching Teng
- Department of Ophthalmology, Chang Gung Memorial Hospital Kaohsiung Branch, Kaohsiung, Taiwan
| | - Pei Chang Wu
- Department of Ophthalmology, Chang Gung Memorial Hospital Kaohsiung Branch, Kaohsiung, Taiwan
| | - Si-Ping Lin
- Department of Optometry, Chung Shan Medical University, Taichung, Taiwan
- Institute of Optometry, Chung Shan Medical University, Taichung, Taiwan
| | - Chien-Yun Wu
- Department of Pathology, Chang Gung Memorial Hospital Kaohsiung Branch, Kaohsiung, Taiwan
| | - Ping-Hsun Wang
- Department of Optometry, Chung Shan Medical University, Taichung, Taiwan
- Institute of Optometry, Chung Shan Medical University, Taichung, Taiwan
| | - Chueh-Tan Chen
- Department of Ophthalmology, Chang Gung Memorial Hospital Kaohsiung Branch, Kaohsiung, Taiwan
| | - Bo-Yie Chen
- Department of Optometry, Chung Shan Medical University, Taichung, Taiwan
- Institute of Optometry, Chung Shan Medical University, Taichung, Taiwan
- Department of Ophthalmology, Chung Shan Medical University Hospital, Taichung, Taiwan
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145
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SYK protects cardiocytes against anoxia and hypoglycemia-induced injury in ischemic heart failure. Mol Immunol 2017; 91:35-41. [DOI: 10.1016/j.molimm.2017.08.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/15/2017] [Accepted: 08/21/2017] [Indexed: 01/30/2023]
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146
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Feng SQ, Aa N, Geng JL, Huang JQ, Sun RB, Ge C, Yang ZJ, Wang LS, Aa JY, Wang GJ. Pharmacokinetic and metabolomic analyses of the neuroprotective effects of salvianolic acid A in a rat ischemic stroke model. Acta Pharmacol Sin 2017; 38:1435-1444. [PMID: 28836583 DOI: 10.1038/aps.2017.114] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 05/19/2017] [Indexed: 12/13/2022] Open
Abstract
Salvianolic acid A (SAA), a water-soluble phenolic acid isolated from the root of Dan Shen, displays distinct antioxidant activity and effectiveness in protection against cerebral ischemia/reperfusion (I/R) damage. However, whether SAA can enter the central nervous system and exert its protective effects by directly targeting brain tissue remains unclear. In this study, we evaluated the cerebral protection of SAA in rats subjected to transient middle cerebral artery occlusion (tMCAO) followed by reperfusion. The rats were treated with SAA (5, 10 mg/kg, iv) when the reperfusion was performed. SAA administration significantly decreased cerebral infarct area and the brain water content, attenuated the neurological deficit and pathology, and enhanced the anti-inflammatory and antioxidant capacity in tMCAO rats. The concentration of SAA in the plasma and brain was detected using LC-MS/MS. A pharmacokinetic study revealed that the circulatory system exposure to SAA was equivalent in the sham controls and I/R rats, but the brain exposure to SAA was significantly higher in the I/R rats than in the sham controls (fold change of 9.17), suggesting that the enhanced exposure to SAA contributed to its cerebral protective effect. Using a GC/MS-based metabolomic platform, metabolites in the serum and brain tissue were extracted and profiled. According to the metabolomic pattern of the tissue data, SAA administration significantly modulated the I/R-caused perturbation of metabolism in the brain to a greater extent than that in the serum, demonstrating that SAA worked at the brain tissue level rather than the whole circulation system. In conclusion, a larger amount of SAA enters the central nervous system in ischemia/reperfusion rats to facilitate its protective and regulatory effects on the perturbed metabolism.
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147
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Xie Z, Wu B, Shen G, Li X, Wu Q. Curcumin alleviates liver oxidative stress in type 1 diabetic rats. Mol Med Rep 2017; 17:103-108. [PMID: 29115468 PMCID: PMC5780069 DOI: 10.3892/mmr.2017.7911] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 10/13/2017] [Indexed: 12/19/2022] Open
Abstract
The aim of the present study was to determine the effects of curcumin on antioxidants using a rat model of type 1 diabetes. Seven-week-old male Sprague-Dawley rats were injected with Streptozotocin (STZ) intraperitoneally to induce this model, and then treated with 1.0% curcumin (weight ratio) mixed in their diet for 21 days. The present study included three groups: Control group (NC), diabetic rat model group (DC) and a curcumin treated group (Diab-Cur). The results demonstrated that curcumin treatment markedly decreased the blood glucose levels, plasma malondialdehyde concentration and plasma activity of glutathione peroxidase (GSH-Px) and catalase (CAT); however, it increased the plasma superoxide dismutase (SOD) and insulin levels. Curcumin treatment increased the expression of the CAT, GSH-Px, HO-1 and norvegicus NAD(P)H quinone dehydrogenase 1, and decreased the SOD1 expression, which, led to a diminished oxidative stress status. In addition, curcumin treatment significantly increased the protein expression of Keap1 in the Diab-Cur group when compared with the DC group, decreased cytosolic concentrations of Nrf2 while increasing nuclear accumulation of Nrf2. The results provide evidence that oxidative stress in the STZ-induced diabetic rat model may be attenuated by curcumin via the activation of the Keap1-Nrf2-ARE signaling pathway, as evidenced by a decrease in the blood glucose concentration and an increase in the transcription of several antioxidant genes.
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Affiliation(s)
- Zhenglu Xie
- Department of Agriculture and Biotechnology, Jinshan College of Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P.R. China
| | - Binbin Wu
- Department of Agriculture and Biotechnology, Jinshan College of Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P.R. China
| | - Guozhi Shen
- Department of Agriculture and Biotechnology, Jinshan College of Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P.R. China
| | - Xiaqing Li
- Department of Agriculture and Biotechnology, Jinshan College of Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P.R. China
| | - Qianying Wu
- Department of Agriculture and Biotechnology, Jinshan College of Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P.R. China
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148
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Xu J, Wu L, Zhang Y, Gu H, Huang Z, Zhou K, Yin X. Activation of AMPK by OSU53 protects spinal cord neurons from oxidative stress. Oncotarget 2017; 8:112477-112486. [PMID: 29348841 PMCID: PMC5762526 DOI: 10.18632/oncotarget.22055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 08/28/2017] [Indexed: 12/19/2022] Open
Abstract
The present study tested the potential effect of OSU53, a novel AMPK activator, against hydrogen peroxide (H2O2)-induced spinal cord neuron damages. Treatment with OSU53 attenuated H2O2-induced death and apoptosis of primary murine spinal cord neurons. OSU53 activated AMPK signaling, which is required for its actions in spinal cord neurons. The AMPK inhibitor Compound C or AMPKα1 siRNA almost abolished OSU53-mediated neuroprotection against H2O2. On the other hand, sustained-activation of AMPK by introducing the constitutive-active AMPKα1 mimicked OSU53's actions, and protected spinal cord neurons from oxidative stress. OSU53 significantly attenuated H2O2-induced reactive oxygen species production, lipid peroxidation and DNA damages in spinal cord neurons. Additionally, OSU53 increased NADPH content and heme oxygenase-1 mRNA expression in H2O2-treated spinal cord neurons. Together, we indicate that targeted-activation of AMPK by OSU53 protects spinal cord neurons from oxidative stress.
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Affiliation(s)
- Jun Xu
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Liang Wu
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Yiming Zhang
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Huijie Gu
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Zhongyue Huang
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Kaifeng Zhou
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Xiaofan Yin
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
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149
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Zheng K, Zhang Q, Lin G, Li Y, Sheng Z, Wang J, Chen L, Lu HH. Activation of Akt by SC79 protects myocardiocytes from oxygen and glucose deprivation (OGD)/re-oxygenation. Oncotarget 2017; 8:14978-14987. [PMID: 28122357 PMCID: PMC5362459 DOI: 10.18632/oncotarget.14785] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 01/11/2017] [Indexed: 12/21/2022] Open
Abstract
SC79 is a novel Akt activator. The current study tested its potential effect against oxygen and glucose deprivation (OGD)/re-oxygenation-induced myocardial cell death. We showed that SC79 activated Akt and protected H9c2 myocardial cells and primary murine myocardiocytes from OGD/re-oxygenation. Reversely, Akt inhibitor MK-2206 or Akt1 shRNA knockdown almost completely abolished SC79-mediated myocardial cytoprotection. SC79 treatment in H9c2 cells inhibited OGD/re-oxygenation-induced programmed necrosis pathway, evidenced by mitochondrial depolarization and cyclophilin D-p53-ANT-1 (adenine nucleotide translocator 1) association. Further, SC79 activated Akt downstream NF-E2-related factor 2 (NRF2) signaling to suppress OGD/re-oxygenation-induced reactive oxygen species (ROS) production. Reversely, NRF2 shRNA knockdown in H9c2 cells largely attenuated SC79-induced ROS scavenging ability and cytoprotection against OGD/re-oxygenation. Together, we conclude that activation of Akt by SC79 protects myocardial cells from OGD/re-oxygenation.
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Affiliation(s)
- Koulong Zheng
- Department of Cardiology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Qing Zhang
- Department of Cardiology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Gang Lin
- Department of Cardiology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Yefei Li
- Department of Cardiology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Zhenqiang Sheng
- Department of Cardiology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Jue Wang
- Department of Cardiology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Liang Chen
- Department of Cardiology, The Second Affiliated Hospital of Nantong University, Nantong, China
| | - Hui-He Lu
- Department of Cardiology, The Second Affiliated Hospital of Nantong University, Nantong, China
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150
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Protective Effect of Salvianolic Acid A on Brain Endothelial Cells after Treatment with Deprivation and Reperfusion of Oxygen-glucose. CHINESE HERBAL MEDICINES 2017. [DOI: 10.1016/s1674-6384(17)60113-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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