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Wang J, Weng Y, Li Y, Zhang Y, Zhou J, Tang J, Lin X, Guo Z, Zheng F, Yu G, Shao W, Hu H, Cai P, Wu S, Li H. The interplay between lncRNA NR_030777 and SF3B3 in neuronal damage caused by paraquat. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 255:114804. [PMID: 36948007 DOI: 10.1016/j.ecoenv.2023.114804] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 03/14/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
Paraquat (PQ) has been widely acknowledged as an environmental risk factor for Parkinson's disease (PD). However, the interaction between splicing factor and long non-coding RNA (lncRNA) in the process of PQ-induced PD has rarely been studied. Based on previous research, this study focused on splicing factor 3 subunit 3 (SF3B3) and lncRNA NR_030777. After changing the target gene expression level by lentiviral transfection technology, the related gene expression was detected by western blot and qRT-PCR. The expression of SF3B3 protein was reduced in Neuro-2a cells after PQ exposure, and the reactive oxygen species (ROS) scavenger N-acetylcysteine prevented this decline. Knockdown of SF3B3 reduced the PQ-triggered NR_030777 expression increase, and overexpression of NR_030777 reduced the transcriptional and translational level of Sf3b3. Then, knockdown of SF3B3 exacerbated the PQ-induced decrease in cell viability and aggravated the reduction of tyrosine hydroxylase (TH) protein expression. Overexpressing SF3B3 reversed the reduction of TH expression caused by PQ. Moreover, after intervention with the autophagy inhibitor Bafilomycin A1, LC3B-II protein expression was further increased in Neuro-2a cells with the knockdown of SF3B3, indicating that autophagy was enhanced. In conclusion, PQ modulated the interplay between NR_030777 and SF3B3 through ROS production, thereby impairing autophagic flux and causing neuronal damage.
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Affiliation(s)
- Junxiang Wang
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Yali Weng
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Yinhan Li
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Yu Zhang
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Jinfu Zhou
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Jianping Tang
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Xinpei Lin
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Zhenkun Guo
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Key Lab of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Fujian Key Lab of Environmental Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Fuli Zheng
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Key Lab of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Fujian Key Lab of Environmental Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Guangxia Yu
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Key Lab of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Fujian Key Lab of Environmental Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Wenya Shao
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Key Lab of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Fujian Key Lab of Environmental Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Hong Hu
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Key Lab of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Fujian Key Lab of Environmental Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Ping Cai
- Department of Health Inspection and Quarantine, School of Public Health, Fujian Medical University, Fuzhou 350122, China
| | - Siying Wu
- Key Lab of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Fujian Key Lab of Environmental Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Department of Epidemiology and Health Statistics, School of Public Health, Fujian Medical University, Fuzhou 350122, China.
| | - Huangyuan Li
- Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Key Lab of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou 350122, China; Fujian Key Lab of Environmental Factors and Cancer, School of Public Health, Fujian Medical University, Fuzhou 350122, China.
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Abdel Baky NA, Al-Najjar AH, Elariny HA, Sallam AS, Mohammed AA. Pramipexole and Lactoferrin ameliorate Cyclophosphamide-Induced haemorrhagic cystitis via targeting Sphk1/S1P/MAPK, TLR-4/NF-κB, and NLRP3/caspase-1/IL-1β signalling pathways and modulating the Nrf2/HO-1 pathway. Int Immunopharmacol 2022; 112:109282. [DOI: 10.1016/j.intimp.2022.109282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 08/30/2022] [Accepted: 09/22/2022] [Indexed: 11/28/2022]
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Ho CL, Kao NJ, Lin CI, Cross TWL, Lin SH. Quercetin Increases Mitochondrial Biogenesis and Reduces Free Radicals in Neuronal SH-SY5Y Cells. Nutrients 2022; 14:nu14163310. [PMID: 36014814 PMCID: PMC9414536 DOI: 10.3390/nu14163310] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/06/2022] [Accepted: 08/09/2022] [Indexed: 11/16/2022] Open
Abstract
Alzheimer’s disease (AD) is a common neurodegenerative disorder that causes dementia and affects millions of people worldwide. The mechanism underlying AD is unclear; however, oxidative stress and mitochondrial biogenesis have been reported to be involved in AD progression. Previous research has also reported the reduction in mitochondrial biogenesis in the brains of patients with AD. Quercetin (QE), a type of polyphenol, has been found to be capable of increasing mitochondrial biogenesis in the body. Accordingly, we explored whether QE could reduce amyloid beta (Aβ) accumulation caused by hydrogen peroxide (H2O2)-induced oxidative stress in SH-SY5Y cells. Our results revealed that QE stimulated the expression of mitochondrial-related proteins such as SIRT1, PGC-1α, and TFAM and subsequently activated mitochondrial biogenesis. Additionally, QE increased ADAM10 expression but reduced H2O2-induced reactive oxygen species production, apoptosis, β-site amyloid precursor protein cleaving enzyme 1 expression, and Aβ accumulation in the SH-SY5Y cells. These findings indicate that QE can effectively elevate mitochondrial biogenesis-related proteins and reduce the damage caused by oxidative stress, making it a promising option for protecting neuronal cells.
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Affiliation(s)
- Chia-Ling Ho
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110, Taiwan
| | - Ning-Jo Kao
- Department of Nutrition and Health Sciences, Kainan University, Taoyuan 338, Taiwan
| | - Ching-I Lin
- Department of Nutrition and Health Sciences, Kainan University, Taoyuan 338, Taiwan
| | - Tzu-Wen L. Cross
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907, USA
| | - Shyh-Hsiang Lin
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110, Taiwan
- Master Program in Food Safety, Taipei Medical University, Taipei 110, Taiwan
- Correspondence: ; Tel.: +886-2-2736-1661 (ext. 6555); Fax: +886-2-2737-3112
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Salman M, Tabassum H, Parvez S. Nrf2/HO-1 mediates the neuroprotective effects of pramipexole by attenuating oxidative damage and mitochondrial perturbation after traumatic brain injury in rats. Dis Model Mech 2020; 13:dmm045021. [PMID: 32540990 PMCID: PMC7449795 DOI: 10.1242/dmm.045021] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 05/26/2020] [Indexed: 12/27/2022] Open
Abstract
Pramipexole (PPX), a D2-like receptor agonist, is generally used in the treatment of Parkinson's disease and restless leg syndrome. Its neuroprotective effects have been shown against various neurological disorders. Recent research work has demonstrated that PPX exerts neuroprotection through mitochondria. However, the neuromodulator-related effects of PPX against traumatic brain injury (TBI) remain unexplored. The present study, therefore, investigated the mechanism of neuroprotection by PPX against oxidative stress, mitochondrial dysfunction and neuronal damage following TBI in rats. We hypothesized that the neuroprotection by PPX in TBI-subjected rats might involve activation of the Nrf2/HO-1 (also known as Nfe2l2/Hmox1) signaling pathway. PPX was injected intraperitoneally (0.25 mg/kg body weight and 1.0 mg/kg body weight) at different time intervals post-TBI. Several neurobehavioral parameters were assessed at 48 h post-TBI, and the brain was isolated for molecular and biochemical analysis. The results demonstrated that PPX treatment significantly improved the behavioral deficits, decreased the lipid peroxidation rate, increased glutathione levels and decreased 4-hydroxynonenal levels in TBI-subjected rats. PPX also increased the activities of glutathione peroxidase and superoxide dismutase enzymes. In addition, PPX treatment inhibited mitochondrial reactive oxygen species production, restored mitochondrial membrane potential and increased ATP levels after a TBI. Further, PPX treatment reduced the Bax/Bcl2 ratio and translocation of Bax to mitochondria and cytochrome-c to the cytosol. Finally, PPX treatment greatly accelerated the translocation of Nrf2 to the nucleus and upregulated HO-1 protein expression. We conclude that the neuroprotective effects of PPX are mediated by activation of the Nrf2/HO-1 signaling pathway following TBI.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Mohd Salman
- Department of Medical Elementology and Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110062, India
| | - Heena Tabassum
- Division of Basic Medical Sciences, Indian Council of Medical Research, Ministry of Health and Family Welfare, Government of India, V. Ramalingaswamy Bhawan, New Delhi 110 029, India
| | - Suhel Parvez
- Department of Medical Elementology and Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110062, India
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Li Y, Sun Y, Zhu M, Zhu R, Zhang J, Zhou J, Wang T, Qiao Y, Lou H. Sacculatane diterpenoids from the Chinese liverwort Pellia epiphylla with protection against H 2O 2-induced apoptosis of PC12 cells. PHYTOCHEMISTRY 2019; 162:173-182. [PMID: 30925378 DOI: 10.1016/j.phytochem.2019.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 03/06/2019] [Accepted: 03/06/2019] [Indexed: 06/09/2023]
Abstract
Eight previously undescribed sacculatane diterpenoids, epiphyllins A-H, and one unknown bibenzyl-based isopentene along with seven known compounds were isolated from the Chinese liverwort Pellia epiphylla (L.) Corda. Their structures were established unequivocally on the basis of spectroscopic data and CD measurement. The quinine reductase-inducing activity evaluation demonstrated that epiphyllins A-D, 1β-hydroxysacculatanolide and pellianolactone B displayed moderate antioxidant effect. Further investigation of pellianolactone B revealed its protective effects on H2O2-induced oxidative insults and apoptosis in PC12 cells.
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Affiliation(s)
- Yi Li
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of the Ministry of Education, Shandong University, Jinan, 250012, People's Republic of China
| | - Yong Sun
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of the Ministry of Education, Shandong University, Jinan, 250012, People's Republic of China
| | - Mingzhu Zhu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of the Ministry of Education, Shandong University, Jinan, 250012, People's Republic of China
| | - Rongxiu Zhu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250010, People's Republic of China
| | - Jiaozhen Zhang
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of the Ministry of Education, Shandong University, Jinan, 250012, People's Republic of China
| | - Jinchuan Zhou
- School of Pharmacy, Linyi University, Linyi, 276000, People's Republic of China
| | - Tian Wang
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of the Ministry of Education, Shandong University, Jinan, 250012, People's Republic of China
| | - Yanan Qiao
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of the Ministry of Education, Shandong University, Jinan, 250012, People's Republic of China
| | - Hongxiang Lou
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of the Ministry of Education, Shandong University, Jinan, 250012, People's Republic of China.
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Siddique YH, Naz F, Khan W, Jyoti S, Raj Singh B, Naqvi AH. Effect of pramipexole alginate nanodispersion (PAND) on the transgenic Drosophila expressing human alpha synuclein in the brain. J Appl Biomed 2018. [DOI: 10.1016/j.jab.2017.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Zhang B, Li W, Dong M. Flavonoids of Kudzu Root Fermented by Eurtotium cristatum Protected Rat Pheochromocytoma Line 12 (PC12) Cells against H₂O₂-Induced Apoptosis. Int J Mol Sci 2017; 18:E2754. [PMID: 29257062 PMCID: PMC5751353 DOI: 10.3390/ijms18122754] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 12/15/2017] [Accepted: 12/15/2017] [Indexed: 01/29/2023] Open
Abstract
Novel bioactive components have greatly attracted attention as they demonstrate health benefits. Reversed-phase high performance liquid chromatography (RP-HPLC) showed that isoflavonoid compounds of kudzu root (Pueraria lobata) fermented by Eurtotium cristatum and extracted using de-ionized water were higher active compared with non-fermented. A model of H₂O₂-inducd cell damage was built using rat pheochromocytoma line 12 (PC12) cell to observe the protective effect of non-fermented kudzu root (Pueraria lobata) (NFK) and fermented kudzu root (Pueraria lobata) (FK). Cell viability and apoptosis were analyzed through inverted microscopy and flow cytometry. The level of lactate dehydrogenase, catalase activity, superoxide dismutase, glutathione, and reactive oxygen species (ROS) were evaluated. Results showed that NFK and FK could significantly protect PC12 cell against damage caused by H₂O₂-induced oxidative stress. The intracellular antioxidant system was increased, protected the cell membrane inhibit H₂O₂-induced apoptosis by scavenging of ROS. Moreover, NFK and FK regulated the cell cycle to prevent cell apoptosis. Isoflavonoid from the kudzu root especially fermented kudzu root with E. cristatum are potentially therapeutic drugs against diseases induced by oxidative damage.
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Affiliation(s)
- Bo Zhang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
- College of Food Science and Technology, Bohai University, Jinzhou 121013, China.
| | - Wen Li
- Jiangsu Key Construction Laboratory of Food Resource Development and Quality Safe, Xuzhou Institute Technology, Xuzhou 221008, China.
| | - Mingsheng Dong
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
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Fu W, Wang H, Ren X, Yu H, Lei Y, Chen Q. Neuroprotective effect of three caffeic acid derivatives via ameliorate oxidative stress and enhance PKA/CREB signaling pathway. Behav Brain Res 2017; 328:81-86. [PMID: 28411149 DOI: 10.1016/j.bbr.2017.04.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 04/06/2017] [Accepted: 04/07/2017] [Indexed: 12/24/2022]
Abstract
This study was conducted to elucidate the neuroprotective effect of caffeic acid phenethyl ester (CAPE), (R)-2-Hydroxy-3-(3,4-dihydroxyphenyl) propionic acid (Danshensu) and Curcumin, three caffeic acid derivatives which are contained in fruits, grains and certain dietary supplements. Our results showed that these compounds significantly attenuated H2O2-induced toxicity in PC12 cells in a dose-dependent manner. Furthermore, these compounds significantly improved the behavioral performance of d-gal-treated mice in both step-down avoidance test and Morris water maze test. Biochemical examination and western blot analysis showed that these compounds could ameliorate oxidative stress and facilitate activation of the protein kinase A (PKA)-cyclic AMP response element-binding protein (CREB) pathway. Its beneficial effects may partly relate to enhancing the activity of endogenous antioxidant enzymes and modulating the PKA/CREB signaling pathway. Furthermore, our results also indicated that the presence of 3, 4-dihydroxyphenyl groups in A ring may enhance their neuroprotective activity.
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Affiliation(s)
- Wei Fu
- Department of Pharmacy, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, PR China
| | - Hongyan Wang
- Department of Periodontics, School of Stomatology, China Medical University, Shenyang 110002, Liaoning Province, PR China
| | - Xiuhua Ren
- Department of Pharmacy, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, PR China
| | - Hengyi Yu
- Department of Pharmacy, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, PR China
| | - Yongfang Lei
- Department of Pharmacy, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, PR China
| | - Qian Chen
- Department of Pharmacy, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, PR China.
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Divate RD, Wang CC, Chou ST, Chang CT, Wang PM, Chung YC. Using wheat bran and soybean meal as solid state fermentation substances for the production of Xylaria nigripes with bioactivities. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Wang JD, Cao YL, Li Q, Yang YP, Jin M, Chen D, Wang F, Wang GH, Qin ZH, Hu LF, Liu CF. A pivotal role of FOS-mediated BECN1/Beclin 1 upregulation in dopamine D2 and D3 receptor agonist-induced autophagy activation. Autophagy 2015; 11:2057-2073. [PMID: 26649942 PMCID: PMC4824582 DOI: 10.1080/15548627.2015.1100930] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Autophagy dysfunction is implicated in the pathogenesis of Parkinson disease (PD). BECN1/Beclin 1 acts as a critical regulator of autophagy and other cellular processes; yet, little is known about the function and regulation of BECN1 in PD. In this study, we report that dopamine D2 and D3 receptor (DRD2 and DRD3) activation by pramipexole and quinpirole could enhance BECN1 transcription and promote autophagy activation in several cell lines, including PC12, MES23.5 and differentiated SH-SY5Y cells, and also in tyrosine hydroxylase positive primary midbrain neurons. Moreover, we identified a novel FOS (FBJ murine osteosarcoma viral oncogene homolog) binding sequence (5′-TGCCTCA-3′) in the rat and human Becn1/BECN1 promoter and uncovered an essential role of FOS binding in the enhancement of Becn1 transcription in PC12 cells in response to the dopamine agonist(s). In addition, we demonstrated a critical role of intracellular Ca2+ elevation, followed by the enhanced phosphorylation of CAMK4 (calcium/calmodulin-dependent protein kinase IV) and CREB (cAMP responsive element binding protein) in the increases of FOS expression and autophagy activity. More importantly, pramipexole treatment ameliorated the SNCA/α-synuclein accumulation in rotenone-treated PC12 cells that overexpress wild-type or A53T mutant SNCA by promoting autophagy flux. This effect was also demonstrated in the substantia nigra and the striatum of SNCAA53T transgenic mice. The inhibition of SNCA accumulation by pramipexole was attenuated by cotreatment with the DRD2 and DRD3 antagonists and Becn1 siRNAs. Thus, our findings suggest that DRD2 and DRD3 agonist(s) may induce autophagy activation via a BECN1-dependent pathway and have the potential to reduce SNCA accumulation in PD.
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Affiliation(s)
- Jian-Da Wang
- a Department of Neurology ; Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases; The Second Affiliated Hospital of Soochow University; Soochow University ; Suzhou , China.,b Institute of Neuroscience; Soochow University ; Suzhou , China.,c Department of Pediatrics ; Second Affiliated Hospital; School of Medicine, Zhejiang University ; Hangzhou, Zhejiang , China
| | - Yu-Lan Cao
- a Department of Neurology ; Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases; The Second Affiliated Hospital of Soochow University; Soochow University ; Suzhou , China.,b Institute of Neuroscience; Soochow University ; Suzhou , China
| | - Qian Li
- b Institute of Neuroscience; Soochow University ; Suzhou , China.,d Department of Pharmacology ; Soochow University; College of Pharmaceutical Sciences ; Suzhou , China
| | - Ya-Ping Yang
- a Department of Neurology ; Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases; The Second Affiliated Hospital of Soochow University; Soochow University ; Suzhou , China
| | - Mengmeng Jin
- a Department of Neurology ; Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases; The Second Affiliated Hospital of Soochow University; Soochow University ; Suzhou , China
| | - Dong Chen
- d Department of Pharmacology ; Soochow University; College of Pharmaceutical Sciences ; Suzhou , China
| | - Fen Wang
- b Institute of Neuroscience; Soochow University ; Suzhou , China
| | - Guang-Hui Wang
- d Department of Pharmacology ; Soochow University; College of Pharmaceutical Sciences ; Suzhou , China
| | - Zheng-Hong Qin
- d Department of Pharmacology ; Soochow University; College of Pharmaceutical Sciences ; Suzhou , China
| | - Li-Fang Hu
- b Institute of Neuroscience; Soochow University ; Suzhou , China.,d Department of Pharmacology ; Soochow University; College of Pharmaceutical Sciences ; Suzhou , China
| | - Chun-Feng Liu
- a Department of Neurology ; Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases; The Second Affiliated Hospital of Soochow University; Soochow University ; Suzhou , China.,b Institute of Neuroscience; Soochow University ; Suzhou , China
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Shibagaki K, Okamoto K, Katsuta O, Nakamura M. Beneficial protective effect of pramipexole on light-induced retinal damage in mice. Exp Eye Res 2015. [PMID: 26213307 DOI: 10.1016/j.exer.2015.07.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We investigated the effects of pramipexole, a potent dopamine receptor D2/D3 agonist, on light-induced retinal damage in mice, H2O2-induced retinal pigment epithelium ARPE-19 cell injury in humans, and hydroxyl radical scavenging activity in a cell-free system. Pramipexole (0.1 and 1 mg/kg body weight) was orally administered to mice 1 h before light exposure (5000 lux, 2 h). Electrophysiological and morphologic studies were performed to evaluate the effects of the pramipexole on light-induced retinal damage in mice. Pramipexole significantly prevented the reduction of the a- and b-wave electroretinogram (ERG) amplitudes caused by light exposure in a dose-dependent manner. In parallel, damage to the inner and outer segments (IS/OS) of the photoreceptors, loss of photoreceptor nuclei, and the number of Tdt-mediated dUTP nick-end labeling (TUNEL)-positive cells in the outer nuclear layer (ONL) caused by light exposure were notably ameliorated by pramipexole. Additionally, pramipexole suppressed H2O2-induced ARPE-19 cell death in vitro in a concentration-dependent manner. The effect of pramipexole was significant at concentrations of 10(-6) M or higher. Pramipexole also significantly prevented H2O2-induced activation of caspases-3/7 and the intracellular accumulation of reactive oxygen species (ROS) in a concentration-dependent manner ranging from 10(-5) to 10(-3) M. Furthermore, pramipexole increased the scavenging activity toward a hydroxyl radical generated from H2O2 in a Fenton reaction. Our results suggest that pramipexole protects against light-induced retinal damage as an antioxidant and that it may be a novel and effective therapy for retinal degenerative disorders, such as dry age-related macular degeneration.
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Affiliation(s)
- Keiichi Shibagaki
- Research and Development Division, Santen Pharmaceutical Co., Ltd., 4-20, Ofuka-cho, Kita-ku, Osaka 530-8552, Japan; Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma-shi, Nara 630-0192, Japan.
| | - Kazuyoshi Okamoto
- Corporate Development Division, Santen Pharmaceutical Co., Ltd., 4-20, Ofuka-cho, Kita-ku, Osaka 530-8552, Japan
| | - Osamu Katsuta
- Research and Development Division, Santen Pharmaceutical Co., Ltd., 4-20, Ofuka-cho, Kita-ku, Osaka 530-8552, Japan
| | - Masatsugu Nakamura
- Research and Development Division, Santen Pharmaceutical Co., Ltd., 4-20, Ofuka-cho, Kita-ku, Osaka 530-8552, Japan
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Safarian F, Khallaghi B, Ahmadiani A, Dargahi L. Activation of S1P1 Receptor Regulates PI3K/Akt/FoxO3a Pathway in Response to Oxidative Stress in PC12 Cells. J Mol Neurosci 2014; 56:177-87. [DOI: 10.1007/s12031-014-0478-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 12/10/2014] [Indexed: 01/23/2023]
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Ang W, Chen G, Xiong L, Chang Y, Pi W, Liu Y, Li C, Zheng J, Zhou L, Yang B, Deng Y, Yang S, Luo Y, Wei Y. Synthesis and biological evaluation of novel naphthalene compounds as potential antidepressant agents. Eur J Med Chem 2014; 82:263-73. [DOI: 10.1016/j.ejmech.2014.05.061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 05/06/2014] [Accepted: 05/25/2014] [Indexed: 12/20/2022]
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Czech DP, Lee J, Correia J, Loke H, Möller EK, Harley VR. Transient neuroprotection by SRY upregulation in dopamine cells following injury in males. Endocrinology 2014; 155:2602-12. [PMID: 24708242 DOI: 10.1210/en.2013-2158] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Emerging evidence suggest sex-specific regulation of dopamine neurons may underlie susceptibility of males to disorders such as Parkinson's disease (PD). In healthy male dopamine neurons, the Y-chromosome gene product, the sex-determining region on the Y chromosome (SRY) modulates dopamine biosynthesis and motor function. We investigated the regulation and function of SRY in a model of dopamine cell injury. Treatment with the dopaminergic toxin, 6-hydroxydopamine (6-OHDA), significantly elevated SRY mRNA expression (9-fold) in human male dopamine M17 cells. SRY up-regulation occurred via the p-quinone pathway, associated with a 3.5-fold increase in expression of GADD45γ, a DNA damage inducible factor gene and known SRY regulator. In turn, a signaling cascade involving GADD45γ/p38-MAPK/GATA activated the SRY promoter. Knockdown of SRY mRNA in 6-OHDA-treated M17 cells was deleterious, increasing levels of reactive oxygen species (ROS), pro-apoptotic marker PUMA mRNA, and cell injury (+25%, +32% and +34%, respectively). Conversely, ectopic over-expression of SRY in 6-OHDA-treated female SH-SY5Y cells was protective, decreasing ROS, PUMA, and cell injury (-40%, -46%, and -30%, respectively). However, the 6-OHDA-induced increase in SRY expression was diminished with higher concentrations of toxins or with chronic exposure to 6-OHDA. We conclude that SRY upregulation after dopamine cell injury is initially a protective response in males, but diminishes with gradual loss in dopamine cells. We speculate that dysregulation of SRY may contribute the susceptibility of males to PD.
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Affiliation(s)
- Daniel P Czech
- Brain and Gender Laboratory (D.P.C., J.L., J.C., H.L., E.K.M., V.R.H.), MIMR-PHI (formerly Prince Henry's Institute of Medical Research), Department of Biochemistry and Molecular Biology (D.P.C., V.R.H.), and Department of Anatomy and Developmental Biology (J.L., V.R.H), Monash University, Melbourne, 3168, Victoria, Australia
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Müller T, Muhlack S. Levodopa-related cysteinyl–glycine and cysteine reduction with and without catechol-O-methyltransferase inhibition in Parkinson’s disease patients. J Neural Transm (Vienna) 2014; 121:643-8. [DOI: 10.1007/s00702-013-1155-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Accepted: 12/26/2013] [Indexed: 12/01/2022]
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Fu W, Du G, Liu D, Ruan JL. Neuroprotective effect of a caffeic acid derivative from Abacopteris penangiana. PHARMACEUTICAL BIOLOGY 2013; 51:376-382. [PMID: 23406358 DOI: 10.3109/13880209.2012.732581] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
CONTEXT A new caffeic acid derivative, named (7'Z)-3-O-(3, 4-dihydroxyphenylethenyl)-caffeic acid (CADP), extracted from Abacopteris penangiana (Hook.) Ching. OBJECTIVE To elucidate the neuroprotective effect of CADP against H₂O₂-induced cytotoxicity in PC12 cells and D-galactose (D-gal)-induced neurotoxicity in mice brain. MATERIALS AND METHODS CADP was isolated from the methanol extract of the rhizomes of A. penangiana. In vitro, the protective effect of CADP (0.1-10 μM) against H₂O₂-induced oxidative damage on PC12 cells was investigated by a MTT assay. In vivo, behavioral tests and antioxidant enzymes measurements were performed to investigate the protective effect of intraperitoneal (i.p.) injection of CADP (5 or 10 mg/kg/day) for 2 weeks on D-gal-induced neurotoxicity in mice. RESULTS The results showed that CADP significantly attenuated cell toxicity in a dose-dependent manner, and the EC₅₀ value of CADP was 0.83 ± 0.02 μM. In vivo, it was found that CADP significantly improved the behavioral performance of D-gal-treated mice in both Morris water maze (MWM) test and step-down avoidance test. As compared with model group, CADP (5, 10 mg/kg/day) attenuated the decrease in superoxide dismutase (SOD) activities by 40.5 and 75.4%, respectively; attenuated the decrease in glutathione peroxidase (GPx) activities by 53.8 and 73.2%, respectively; attenuated the decrease in catalase activities by 12.0 and 53.3%, respectively; reduced the increased levels of malondialdehyde (MDA) by 38.6 and 79.9%, respectively. DISCUSSION AND CONCLUSION The results suggested that CADP has significant neuroprotective effects which can be attributed to inhibiting the generation of free radical and enhancing the activity of endogenous antioxidant enzymes.
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Affiliation(s)
- Wei Fu
- Department of Pharmacy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
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Cheng B, Lu H, Bai B, Chen J. d-β-Hydroxybutyrate inhibited the apoptosis of PC12 cells induced by H2O2 via inhibiting oxidative stress. Neurochem Int 2012; 62:620-5. [PMID: 23022628 DOI: 10.1016/j.neuint.2012.09.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Revised: 09/13/2012] [Accepted: 09/17/2012] [Indexed: 12/01/2022]
Abstract
Oxidative stress has an important role in neurodegenerative diseases and cerebral ischemic injury. It is reported that d-β-hydroxybutyrate (DβHB), the major component of ketone bodies, is neuroprotective in recent studies. Therefore, in the present work the neuroprotective effects of DβHB on H2O2-induced apoptosis mediated by oxidative stress was investigated. PC12 cells were exposed to H2O2 with different concentrations of H2O2 for different times after DβHB pretreatment. MTT assay, apoptotic rates, intracellular reactive oxygen species (ROS) level, GSH content, mitochondrial membrane potential (MMP) and caspase-3 activity were determined. The results showed that DβHB inhibited the decrease of cell viability induced by H2O2 in PC12 cells. DβHB decreased the apoptotic rates induced by H2O2. The changes of intracellular ROS, GSH, MMP and caspase-3 activity due to H2O2 exposure were partially reversed in PC12 cells. So DβHB inhibited the apoptosis of PC12 cells induced by H2O2 via inhibiting oxidative stress.
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Affiliation(s)
- Baohua Cheng
- Department of Neurology, Jining Medical University, Jining 272067, PR China.
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Corcia P, Gordon PH. Amyotrophic lateral sclerosis and the clinical potential of dexpramipexole. Ther Clin Risk Manag 2012; 8:359-66. [PMID: 22956874 PMCID: PMC3431958 DOI: 10.2147/tcrm.s21981] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder that leads to progressive weakness from loss of motor neurons and death on average in less than 3 years after symptom onset. No clear causes have been found and just one medication, riluzole, extends survival. Researchers have identified some of the cellular processes that occur after disease onset, including mitochondrial dysfunction, protein aggregation, oxidative stress, excitotoxicity, inflammation, and apoptosis. Mitochondrial disease may be a primary event in neurodegeneration or occur secondary to other cellular processes, and may itself contribute to oxidative stress, excitotoxicity, and apoptosis. Clinical trials currently aim to slow disease progression by testing drugs that impact one or more of these pathways. While every agent tested in the 18 years after the approval of riluzole has been ineffective, basic and clinical research methods in ALS have become dramatically more sophisticated. Dexpramipexole (RPPX), the R(+) enantiomer of pramiprexole, which is approved for symptomatic treatment of Parkinson disease, carries perhaps the currently largest body of pre-and early clinical data that support testing in ALS. The neuroprotective properties of RPPX in various models of neurodegeneration, including the ALS murine model, may be produced through protective actions on mitochondria. Early phase trials in human ALS suggest that the drug can be taken safely by patients in doses that provide neuroprotection in preclinical models. A Phase III trial to test the efficacy of RPPX in ALS is underway.
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Affiliation(s)
- Philippe Corcia
- Centre SLA, CHRU de Tours, Tours, France; UMR INSERM U930, Université François Rabelais de Tours (PC), Tours, France
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Su JD, Yen JH, Li S, Weng CY, Lin MH, Ho CT, Wu MJ. 3',4'-didemethylnobiletin induces phase II detoxification gene expression and modulates PI3K/Akt signaling in PC12 cells. Free Radic Biol Med 2012; 52:126-41. [PMID: 22064360 DOI: 10.1016/j.freeradbiomed.2011.10.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 10/03/2011] [Accepted: 10/04/2011] [Indexed: 01/12/2023]
Abstract
Oxidative stress is considered a major cause of neurodegenerative disorders. In this work, we investigated the cytoprotective effects and mechanisms of the citrus flavonoid nobiletin (NOB) and its metabolite, 3',4'-didemethylnobiletin (3',4'-dihydroxy-5,6,7,8-tetramethoxyflavone; DTF), in PC12 cells. Both NOB and DTF exhibited strong potency in attenuating serum withdrawal- and H(2)O(2)-caused cell death and increased intracellular GSH level via upregulation of both catalytic and modifier subunits of glutamate-cysteine ligase (GCL). However, only DTF suppressed intracellular ROS accumulation in H(2)O(2)-treated cells, induced heme oxygenase-1 (HO-1) expression, and enhanced nuclear factor E2-related factor 2 (Nrf2) binding to the ARE. Nevertheless, DTF-mediated HO-1 upregulation was independent of Nrf2 activation because knockdown of Nrf2 expression by siRNA did not affect its expression. DTF suppressed NF-κB activation, and addition of NF-κB inhibitor, pyrrolidine dithiocarbamate or Bay 11-7082, synergistically enhanced DTF-mediated HO-1 expression, indicating that HO-1 induction is associated with NF-κB suppression. NOB and DTF also activated the ERK, JNK, and Akt pathways in PC12 cells that had undergone serum starvation. Addition of pharmacological kinase inhibitors, U0126, SP600125, and LY294002, caused cytotoxicity and the last significantly attenuated NOB- and DTF-mediated antiapoptotic actions, indicating the involvement of PI3K/Akt signaling in their cytoprotective effects. In conclusion, HO-1 and GCL upregulation and intrinsic ROS-scavenging activity may contribute to DTF-mediated cytoprotection. Furthermore, modulation of PI3K/Akt signaling is involved in channeling the DTF stimulus for cell survival against oxidative insults.
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Affiliation(s)
- Jeng-Dian Su
- Department of Biotechnology, Chia-Nan University of Pharmacy and Science, Tainan, Taiwan
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20
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Fukuhara Y, Tsuchiya K, Horinouchi Y, Tajima S, Kihira Y, Hamano S, Kawazoe K, Ikeda Y, Ishizawa K, Tomita S, Tamaki T. Protective effect of photodegradation product of nifedipine against tumor necrosis factor alpha-induced oxidative stress in human glomerular endothelial cells. THE JOURNAL OF MEDICAL INVESTIGATION 2011; 58:118-26. [PMID: 21372496 DOI: 10.2152/jmi.58.118] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Recently, increasing evidence suggests that the antihypertensive drug nifedipine acts as a protective agent for endothelial cells, and that the activity is unrelated to its calcium channel blocking. Nitrosonifedipine (NO-NIF) is metabolically and photochemically produced from nifedipine, and NO-NIF has been recognized as a contaminant of nifedipine because it has no antihypertensive effect. Treatment of tumor necrosis factor-α (TNF-α) suppressed the cell viability and facilitated the expression of Inter-Cellular Adhesion Molecule 1(ICAM-1) in human glomerular endothelial cells (HGECs) though, pretreatment of NO-NIF significantly recovered the TNF-α-induced cell damage to the same extent as Trolox-C did, and suppressed the ICAM-1 expression in a concentration dependent manner. In addition, NO-NIF inhibited the cell toxicity induced by cumene hydroperoxide, which hampers the integrity of cell membrane through oxidative stress, as effective as Trolox-c. These data suggest that NO-NIF is a candidate for a new class of antioxidative drug that protect cells against oxidative stress in glomerular endothelial cells.
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Affiliation(s)
- Yayoi Fukuhara
- Department of Pharmacology, Institute of Health Bioscience, University of Tokushima Graduate School, Tokushima, Japan
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Müller T. Motor complications, levodopa metabolism and progression of Parkinson's disease. Expert Opin Drug Metab Toxicol 2011; 7:847-55. [PMID: 21480824 DOI: 10.1517/17425255.2011.575779] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
INTRODUCTION Oxidative stress is an essential component of neuronal death in Parkinson's disease (PD). Clinically, progression of PD is also characterised by onset of motor complications (MC). MC results from the peripheral and central degree of fluctuations of levodopa (LD) and of dopamine. AREAS COVERED This review highlights aspects of LD and dopamine metabolism in chronic neurodegeneration in PD. A Medline search (terms: homocysteine, LD, PD, progression [from 2000 onwards]) was performed and considered preclinical and clinical investigations. The author discusses pharmacokinetic and metabolic aspects of chronic LD administration in PD patients and provides a therapeutic concept to reduce probable PD accelerating consequences of chronic LD application. EXPERT OPINION The author suggests that the future 'ideal' oral LD therapy should be homocysteine-reducing, methyl-group-donating, oxidative-stress-decreasing and antiglutamatergic while also allowing continuous delivery to the brain. This may slow the progression of PD and delay the onset of MC, both of which represent unmet needs in the treatment of PD patients.
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Affiliation(s)
- Thomas Müller
- St. Joseph Hospital Berlin-Weissensee, Department of Neurology , Gartenstr. 1, 13088 Berlin, Germany.
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Li WW, Gao XM, Wang XM, Guo H, Zhang BL. Icariin inhibits hydrogen peroxide-induced toxicity through inhibition of phosphorylation of JNK/p38 MAPK and p53 activity. Mutat Res 2011; 708:1-10. [PMID: 21236269 DOI: 10.1016/j.mrfmmm.2010.12.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2010] [Revised: 09/25/2010] [Accepted: 12/27/2010] [Indexed: 05/30/2023]
Abstract
Oxidative stress caused by hydrogen peroxide (H(2)O(2)) plays an important role in the pathogenesis of Alzheimer's disease (AD). The prominent damages caused by H(2)O(2) include the ruin of membrane integrity, loss of intracellular neuronal glutathione (GSH), oxidative damage to DNA as well as the subsequent caspase-3 and p53 activation. Icariin is a flavonoid extracted from the traditional Chinese herb Epimedium brevicornum Maxim. We have previously reported that icariin has a good curative effect on patients with mild cognitive impairment (MCI), AD animal and cell models. However, the molecular mechanism of how icariin exerts neuroprotective effects is still not well understood. To address this question, we exposed undifferentiated neuronal cell lines (PC12 cells) to hydrogen peroxide (H(2)O(2)) and investigated the possible neuroprotective mechanisms of icariin. Vitamin E was used as a positive control. We observed that H(2)O(2) activated the JNK/p38 mitogen-activated protein kinase (MAPK) and induced PC12 cells apoptosis in a concentration-dependent manner. More over, we demonstrated that icariin protected PC12 cells by attenuating LDH leakage, reducing GSH depletion, preventing DNA oxidation damage and inhibiting subsequent activation of caspase-3 and p53, which are the main targets of H(2)O(2)-induced cell damage. In addition, we also found that icariin's neuroprotective effect may partly correlate with its inhibitory effect on JNK/p38 MAPK pathways. Therefore, our findings suggest that icariin is a candidate for a novel neuroprotective drug to against oxidative-stress induced neurodegeneration.
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Affiliation(s)
- Wei-Wei Li
- Integrated Laboratory of TCM and Western Medicine, Peking University First Hospital, NO. 8, Xishiku Street, Xicheng District, Beijing 10034, China
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An HX, Jin ZF, Ge XF, Wu J, Chen C, Zhang FM, Qu W, Liu XG, Liu SY. Parathyroid hormone(1-34)-induced apoptosis in neuronal rat PC12 cells: Implications for neurotoxicity. Pathol Res Pract 2010; 206:821-7. [DOI: 10.1016/j.prp.2010.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Revised: 09/04/2010] [Accepted: 09/09/2010] [Indexed: 10/18/2022]
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Azam F, Barodia SK, Anwer T, Alam MM. Neuroprotective effect of naphtha[1,2-d]thiazol-2-amine in an animal model of Parkinson's disease. J Enzyme Inhib Med Chem 2010; 24:808-17. [PMID: 18846462 DOI: 10.1080/14756360802399183] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Increased oxidative stress has been implicated in the pathogenesis of dopaminergic neurodegeneration leading to the development of Parkinson's disease. In this study, we investigated whether naphtha[1,2-d]thiazol-2-amine (NTA) may ameliorate haloperidol-induced catalepsy and oxidative damage in mice brain. Haloperidol-induced catalepsy was measured with the standard bar test. The extent of oxidative stress has been evaluated by measuring levels of MDA, GSH and activities of antioxidant enzymes (SOD and GSH-Px) from brain homogenate. Haloperidol treatment significantly induced the catalepsy as observed from increased descent time measured in the bar test. Pretreatment with NTA significantly reduced the catalepsy induced by haloperidol in a dose-dependent manner. The elevated level of MDA in haloperidol-treated mice was significantly decreased by NTA pretreatment. The decreased level of GSH as well as SOD and GSH-Px activities in haloperidol-treated mice were significantly increased by NTA pretreatment. NTA reduces the oxidative stress allowing recovery of detoxifying enzyme activities and controlling free radical production, suggesting a potential role of the drug as an alternative/adjuvant drug in preventing and treating the neurodegenerative diseases, such as Parkinson's disease.
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Affiliation(s)
- Faizul Azam
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Seventh of October University, PO Box 2873Misurata, Libya.
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Gao Y, Zhang HW, Qiao HL, Wang W, Chang JB. Protective effect of 3-butyl-6-bromo-1(3H)-isobenzofuranone on hydrogen peroxide-induced damage in PC12 cells. Brain Res 2010; 1358:239-47. [DOI: 10.1016/j.brainres.2010.08.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 08/13/2010] [Accepted: 08/13/2010] [Indexed: 10/19/2022]
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Crispo JAG, Piché M, Ansell DR, Eibl JK, Tai IT, Kumar A, Ross GM, Tai TC. Protective effects of methyl gallate on H2O2-induced apoptosis in PC12 cells. Biochem Biophys Res Commun 2010; 393:773-8. [PMID: 20171161 DOI: 10.1016/j.bbrc.2010.02.079] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Accepted: 02/12/2010] [Indexed: 01/01/2023]
Abstract
Neurodegenerative disorders are a class of diseases that have been linked to apoptosis induced by elevated levels of reactive oxygen species (ROS). ROS activates the apoptotic cascade through mitochondrial dysfunction and damage to lipids, proteins and DNA. Recently, fruit and tea-derived polyphenols have been found to be beneficial in decreasing oxidative stress and increasing overall health. Further, polyphenols including epigallocatechin gallate (EGCG) have been reported to inhibit apoptotic signaling and increase neural cell survival. In an effort to better understand the beneficial properties associated with polyphenol consumption, the aim of this study was to explore the neuroprotective effects of EGCG, methyl gallate (MG), gallic acid (GA) and N-acetylcysteine (NAC) on H(2)O(2)-induced apoptosis in PC12 cells and elucidate potential protective mechanisms. Cell viability data demonstrates that MG and NAC pre-treatments significantly increase viability of H(2)O(2)-stressed cells, while pre-treatments with EGCG and GA exacerbates stress. Quantitation of apoptosis and mitochondrial membrane potential shows that MG pre-treatment prevents mitochondria depolarization, however does not inhibit apoptosis and is thus evidence that MG can inhibit mitochondria-mediated apoptosis. Subsequent analysis of DNA degradation and caspase activation reveals that MG inhibits activation of caspase 9 and has a partial inhibitory effect on DNA degradation. These findings confirm the involvement of both intrinsic and extrinsic apoptotic pathways in H(2)O(2)-induced apoptosis and suggest that MG may have potential therapeutic properties against mitochondria-mediated apoptosis.
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Affiliation(s)
- James A G Crispo
- Medical Sciences Division, Northern Ontario School of Medicine, Sudbury, ON, Canada
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Ferrari-Toninelli G, Maccarinelli G, Uberti D, Buerger E, Memo M. Mitochondria-targeted antioxidant effects of S(-) and R(+) pramipexole. BMC Pharmacol 2010; 10:2. [PMID: 20137065 PMCID: PMC2829550 DOI: 10.1186/1471-2210-10-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2009] [Accepted: 02/05/2010] [Indexed: 11/16/2022] Open
Abstract
Background Pramipexole exists as two isomers. The S(-) enantiomer is a potent D3/D2 receptor agonist and is extensively used in the management of PD. In contrast, the R(+) enantiomer is virtually devoid of any of the DA agonist effects. Very limited studies are available to characterize the pharmacological spectrum of the R(+) enantiomer of pramipexole. Results Using differentiated SH-SY5Y neuroblastoma cells as an experimental model, here we show that S(-) and R(+) pramipexole are endowed with equipotent efficacy in preventing cell death induced by H2O2 and inhibiting mitochondrial reactive oxygen species generation. Both pramipexole enantiomers prevented mitochondrial ROS generation with a potency about ten times higher then that elicited for neuroprotection. Conclusions These results support the concept of both S(-) and R(+) pramipexole enantiomers as mitochondria-targeted antioxidants and suggest that the antioxidant, neuroprotective activity of these drugs is independent of both the chiral 6-propylamino group in the pramipexole molecule and the DA receptor stimulation.
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Affiliation(s)
- Giulia Ferrari-Toninelli
- Department of Biomedical Sciences and Biotechnologies and National Institute of Neuroscience, University of Brescia, Brescia, Italy
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Nakayama H, Zhao J, EI-FAKhrany A, Isosaki M, Satoh H, Kyotani Y, Yoshizumi M. Neuroprotective effects of pramipexole against tunicamycin-induced cell death in PC12 cells. Clin Exp Pharmacol Physiol 2009; 36:1183-5. [DOI: 10.1111/j.1440-1681.2009.05224.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Neuroprotective effect of the antiparkinsonian drug pramipexole against nigrostriatal dopaminergic degeneration in rotenone-treated mice. Neurochem Int 2009; 55:760-7. [DOI: 10.1016/j.neuint.2009.07.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2009] [Revised: 07/23/2009] [Accepted: 07/23/2009] [Indexed: 12/21/2022]
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Safflor yellow B suppresses pheochromocytoma cell (PC12) injury induced by oxidative stress via antioxidant systemand Bcl-2 /Bax pathway. Naunyn Schmiedebergs Arch Pharmacol 2009; 380:135-42. [DOI: 10.1007/s00210-009-0424-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2009] [Accepted: 04/27/2009] [Indexed: 01/18/2023]
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Chen B, Wei J, Wang W, Cui G, Zhao Y, Zhu X, Zhu M, Guo W, Yu J. Identification of Signaling Pathways Involved in Aberrant Production of Adipokines in Adipocytes Undergoing Oxidative Stress. Arch Med Res 2009; 40:241-8. [DOI: 10.1016/j.arcmed.2009.03.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2008] [Accepted: 03/09/2009] [Indexed: 02/02/2023]
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Gribkoff VK, Bozik ME. KNS-760704 [(6R)-4,5,6,7-tetrahydro-N6-propyl-2, 6-benzothiazole-diamine dihydrochloride monohydrate] for the treatment of amyotrophic lateral sclerosis. CNS Neurosci Ther 2008; 14:215-26. [PMID: 18801114 DOI: 10.1111/j.1755-5949.2008.00048.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Developing effective treatments for chronic neurodegenerative disorders such as amyotrophic lateral sclerosis (ALS) has proven extremely difficult. ALS is universally fatal, characterized by progressive weakness due to the degeneration of upper and lower motor neurons, and leads eventually to respiratory failure which is the usual cause of death. Only a single treatment has been approved, the modestly effective nonspecific neuroprotectant Rilutek (riluzole; 2-amino-6-(trifluoromethoxy)benzothiazole). KNS-760704 [(6R)-4,5,6,7-tetrahydro-N6-propyl-2,6-benzothiazole-diamine dihydrochloride, RPPX], a synthetic amino-benzothiazole with demonstrated activity in maintaining mitochondrial function, is being developed as a treatment for ALS. It has proven to be effective in multiple in vitro and in vivo assays of neuroprotection, including the G93A-SOD1 mutant mouse model; however, its specific mechanism of action remains unknown. The potential of KNS-760604 as a treatment for ALS was first suggested by studies showing that its optical enantiomer, Mirapex[(6S)-4,5,6,7-tetrahydro-N6-propyl-2,6-benzothiazole-diamine; pramipexole dihydrochloride; PPX], a high-affinity agonist at dopamine D2, D3, and D4 receptors, exhibits important neuroprotective properties independent of its dopamine receptor agonism. In cell-based assays, both RPPX and PPX reduce the production of reactive oxygen species (ROS), attenuate the activation of apoptotic pathways, and increase cell survival in response to a variety of neurotoxins. However, PPX has limited utility as a clinical neuroprotective agent because the drug concentrations required for neuroprotection would likely produce unacceptable dopaminergic side effects. RPPX, on the other hand, while possessing the same neuroprotective potential as PPX, is a much lower-affinity dopamine receptor agonist and may therefore be more useful in the treatment of ALS. This review will examine the data supporting the hypothesis that the RPPX may have therapeutic potential for the treatment of neurodegenerative disorders including ALS. In addition, we will briefly review recent preclinical data in support of RPPX, and discuss the current status of its clinical development.
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Cho ES, Jang YJ, Hwang MK, Kang NJ, Lee KW, Lee HJ. Attenuation of oxidative neuronal cell death by coffee phenolic phytochemicals. Mutat Res 2008; 661:18-24. [PMID: 19028509 DOI: 10.1016/j.mrfmmm.2008.10.021] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Revised: 10/22/2008] [Accepted: 10/24/2008] [Indexed: 11/30/2022]
Abstract
Neurodegenerative disorders such as Alzheimer's disease (AD) are strongly associated with oxidative stress, which is induced by reactive oxygen species (ROS) including hydrogen peroxide (H(2)O(2)). Recent studies suggest that moderate coffee consumption may reduce the risk of neurodegenerative diseases such as AD, but the molecular mechanisms underlying this effect remain to be clarified. In this study, we investigated the protective effects of chlorogenic acid (5-O-caffeoylquinic acid; CGA), a major phenolic phytochemical found in instant decaffeinated coffee (IDC), and IDC against oxidative PC12 neuronal cell death. IDC (1 and 5 microg/ml) or CGA (1 and 5 microM) attenuated H(2)O(2)-induced PC12 cell death. H(2)O(2)-induced nuclear condensation and DNA fragmentation were strongly inhibited by pretreatment with IDC or CGA. Pretreatment with IDC or CGA also inhibited the H(2)O(2)-induced cleavage of poly(ADP-ribose) polymerase (PARP), and downregulation of Bcl-X(L) and caspase-3. The accumulation of intracellular ROS in H(2)O(2)-treated PC12 cells was dose-dependently diminished by IDC or CGA. The activation of c-Jun N-terminal protein kinase (JNK) and p38 mitogen-activated protein kinase (MAPK) by H(2)O(2) in PC12 cells was also inhibited by IDC or CGA. Collectively, these results indicate that IDC and CGA protect PC12 cells from H(2)O(2)-induced apoptosis by blocking the accumulation of intracellular ROS and the activation of MAPKs.
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Affiliation(s)
- Eun Sun Cho
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
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Imamura K, Takeshima T, Nakaso K, Ito S, Nakashima K. Pramipexole has astrocyte-mediated neuroprotective effects against lactacystin toxicity. Neurosci Lett 2008; 440:97-102. [DOI: 10.1016/j.neulet.2008.05.067] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2008] [Revised: 05/03/2008] [Accepted: 05/17/2008] [Indexed: 12/21/2022]
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Xiao X, Liu J, Hu J, Zhu X, Yang H, Wang C, Zhang Y. Protective effects of protopine on hydrogen peroxide-induced oxidative injury of PC12 cells via Ca(2+) antagonism and antioxidant mechanisms. Eur J Pharmacol 2008; 591:21-7. [PMID: 18602385 DOI: 10.1016/j.ejphar.2008.06.045] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Revised: 05/22/2008] [Accepted: 06/02/2008] [Indexed: 02/07/2023]
Abstract
Calcium and lipid peroxidation play important roles in oxidative stress-induced cellular injury and apoptosis, which ultimately cause cell death. In this study we examined whether protopine had a neuroprotection against H(2)O(2)-induced injury in PC12 cells. Pretreatment of PC12 cells with protopine improved the cell viability, enhanced activities of superoxide dismutase, glutathione peroxidase and catalase, and decreased malondialdehyde level in the H(2)O(2) injured cells. Protopine also reversed the increased intracellular Ca(2+) concentration and the reduced mitochondrial membrane potential caused by H(2)O(2) in the cells. Furthermore, protopine was able to inhibit caspase-3 expression and cell apoptosis induced by H(2)O(2). In summary, this study demonstrates that protopine is able to relieve H(2)O(2)-induced oxidative stress and apoptosis in PC12 cells, at least in part, by Ca(2+) antagonism and antioxidant mechanisms.
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Affiliation(s)
- Xianghua Xiao
- Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710061, People's Republic of China
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Iravani MM, Sadeghian M, Leung CCM, Tel BC, Rose S, Schapira AH, Jenner P. Continuous subcutaneous infusion of pramipexole protects against lipopolysaccharide-induced dopaminergic cell death without affecting the inflammatory response. Exp Neurol 2008; 212:522-31. [PMID: 18571649 DOI: 10.1016/j.expneurol.2008.04.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2008] [Revised: 04/02/2008] [Accepted: 04/30/2008] [Indexed: 12/27/2022]
Abstract
The D2/D3 dopamine receptor agonist pramipexole, protects against toxin-induced dopaminergic neuronal destruction but its mechanism of action is unknown. Inflammation following glial cell activation contributes to cell death in Parkinson's disease and we now report on the effects of acute or chronic administration of pramipexole on lipopolysaccharide (LPS) induced inflammation and nigral dopaminergic cell death in the rat. At 48 h and 30 days following supranigral administration of LPS, approximately 70% of tyrosine hydroxylase (TH) immunoreactive (-ir) cells in substantia nigra had degenerated with a corresponding loss of TH-ir terminals in the striatum. In rats acutely treated with pramipexole (2x1 mg/kg; s.c.) 48 h following LPS application, there was no difference in the number of TH-ir cells or terminals compared to LPS-treated rats receiving vehicle. However, the continuous subcutaneous infusion of pramipexole for 7 days prior to LPS and 21 days subsequently, produced a marked preservation of both TH-ir cells and terminals. At 48 h or 30 days, LPS induced an up-regulation of ubiquitin-ir within the nigral TH-ir neurones, which was reduced by pramipexole treatment. Thirty days following supranigral LPS administration (9 days after the end of infusion), (+)-amphetamine (5 mg/kg, i.p.) caused robust ipsiversive rotation. In rats treated with LPS but receiving continuous subcutaneous administration of pramipexole, (+)-amphetamine-induced rotation was markedly reduced. LPS-induced increase in the levels of inflammatory markers, were not affected by either acute administration or continuous infusion of pramipexole. Continuous infusion of pramipexole protected dopaminergic neurones against inflammation induced degeneration but without modification of the inflammatory response.
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Affiliation(s)
- Mahmoud M Iravani
- Neurodegenerative Disease Research Centre, School of Health and Biomedical Sciences, King's College, London SE1 1UL, UK
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Cho ES, Lee KW, Lee HJ. Cocoa procyanidins protect PC12 cells from hydrogen-peroxide-induced apoptosis by inhibiting activation of p38 MAPK and JNK. Mutat Res 2008; 640:123-30. [PMID: 18272186 DOI: 10.1016/j.mrfmmm.2007.12.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2007] [Revised: 10/30/2007] [Accepted: 12/19/2007] [Indexed: 12/19/2022]
Abstract
Oxidative stress induced by reactive oxygen species has been strongly associated with the pathogenesis of neurodegenerative disorders, including Alzheimer's disease. In this study, we investigated the possible protective effects of a cocoa procyanidin fraction (CPF) and procyanidin B2 (epicatechin-(4beta-8)-epicatechin) - a major polyphenol in cocoa - against apoptosis of PC12 rat pheochromocytoma (PC12) cells induced by hydrogen peroxide (H(2)O(2)). CPF (1 and 5 microg/ml) and procyanidin B2 (1 and 5 microM) reduced PC12 cell death caused by H(2)O(2), as determined by MTT and trypan blue exclusion assays. CPF and procyanidin B2 attenuated the H(2)O(2)-induced fragmentation of nucleus and DNA in PC12 cells. Western blot data demonstrated that H(2)O(2) induced cleavage of poly(ADP-ribose)polymerase (PARP), downregulated Bcl-X(L) and Bcl-2 in PC12 cells. Pretreatment with CPF or procyanidin B2 before H(2)O(2) treatment diminished PARP cleavage and increased Bcl-X(L) and Bcl-2 expression compared with those only treated with H(2)O(2). Activation of caspase-3 by H(2)O(2) was inhibited by pretreatment with CPF or procyanidin B2. Furthermore, H(2)O(2)-induced rapid and significant phosphorylation of c-Jun N-terminal protein kinase (JNK) and p38 mitogen-activated protein kinase (MAPK), and both of these effects were attenuated by CPF or procyanidin B2 treatment. These results suggest that the protective effects of CPF and procyanidin B2 against H(2)O(2)-induced apoptosis involve inhibiting the downregulation of Bcl-X(L) and Bcl-2 expression through blocking the activation of JNK and p38 MAPK.
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Affiliation(s)
- Eun Sun Cho
- Department of Agricultural Biotechnology, Center for Agricultural Biomaterials, Seoul National University, San 56-1, Shillim-dong, Gwanak-gu, Seoul 151-921, Republic of Korea
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Li RC, Morris MW, Lee SK, Pouranfar F, Wang Y, Gozal D. Neuroglobin protects PC12 cells against oxidative stress. Brain Res 2007; 1190:159-66. [PMID: 18083144 DOI: 10.1016/j.brainres.2007.11.022] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Revised: 11/14/2007] [Accepted: 11/15/2007] [Indexed: 02/04/2023]
Abstract
Neuroglobin (Ngb) is a newly discovered globin in the vertebrate brain that exhibits neuroprotection against hypoxic/ischemic injury. Hypoxic/ischemic brain injury is associated with accumulation of reactive oxygen species (ROS) and/or reactive nitrogen species (RNS), and antioxidants or ROS scavengers promote cell survival. Therefore, Ngb may serve as a scavenger of toxic reactive species, such as hydrogen peroxide. To examine the anti-oxidative role of neuroglobin, PC12 cells were transfected with wild type and mutant (H64 V/H96A) Ngb for 48 h and then treated with H2O2 (0.1, 0.2 and 0.4 mM) for 6 h. Ngb siRNA decreased the H2O2-induced Ngb expression and exacerbated H2O2-induced cell injury. Transient transfection of Ngb induced dose-dependent increases in Ngb protein expression and did not alter SOD, GPX, and catalase activities. Overexpression of wild type Ngb, but not of mutant Ngb, significantly attenuated H2O2-induced ROS/RNS accumulation and lipid peroxidation, decreased H2O2-induced mitochondrial dysfunction and apoptosis, and promoted overall cell survival. Thus, Ngb plays a protective role against oxidative stress, which appears to be primarily mediated by intrinsic Ngb antioxidant properties.
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Affiliation(s)
- Richard C Li
- Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA
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Uberti D, Bianchi I, Olivari L, Ferrari-Toninelli G, Canonico P, Memo M. Pramipexole prevents neurotoxicity induced by oligomers of beta-amyloid. Eur J Pharmacol 2007; 569:194-6. [PMID: 17572405 DOI: 10.1016/j.ejphar.2007.05.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2007] [Revised: 04/26/2007] [Accepted: 05/03/2007] [Indexed: 11/25/2022]
Abstract
Here we demonstrate that pramipexole, an antiparkinsonian dopamine receptor agonist drug, exerts neuroprotective effects against beta-amyloid neurotoxicity. Using a specific protocol to test individually oligomers, fibrils, or unaggregated amyloid beta-peptide, we found pramipexole able to protect cells against oligomers and fibrils. Unaggregated amyloid beta-peptide was found unable to cause cell death. Fibrils and oligomers were also found to produce elevated amount of free radicals, and this effect was prevented by pramipexole. We propose pramipexole may become in the future a coadjuvant in the treatment of neuropathologies, besides Parkinson's disease, where amyloid beta-peptide-mediated oxidative injury exerts a relevant role.
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Affiliation(s)
- Daniela Uberti
- Department of Biomedical Sciences and Biotechnologies, University of Brescia, Viale Europa 11, 25124 Brescia, Italy
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Uberti D, Bianchi I, Olivari L, Ferrari-Toninelli G, Bonini SA, Memo M. Dopaminergic agonists: possible neurorescue drugs endowed with independent and synergistic multisites of action. Neurochem Res 2007; 32:1726-9. [PMID: 17486445 DOI: 10.1007/s11064-007-9350-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Accepted: 04/03/2007] [Indexed: 12/31/2022]
Abstract
Dopaminergic agonists have been usually used as adjunctive therapy for the cure of Parkinson's disease (PD). It is generally believed that treatment with these drugs is symptomatic rather then curative and does not stop or delay the progression of neuronal degeneration. However, several DA agonists of the DA D2-receptor family (including D2, D3 and D4-subtypes) have recently been shown to possess neuroprotective properties in different in vitro and in vivo experimental PD models. Here we summarize some recent data from our and other groups underlining the wide pharmacological spectrum of DA agonists currently used for treating PD patients. In particular, the mechanism of action of different DA agonists does not appear to be restricted to the stimulation of selective DA receptor subtypes being these drugs endowed with intrinsic, independent, and peculiar antioxidant effects. This activity may represent an additional pharmacological property contributing to their clinical efficacy in PD.
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Affiliation(s)
- Daniela Uberti
- Department of Biomedical Sciences and Biotechnologies, University of Brescia, Viale Europa 11, Brescia, 25124, Italy
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Gabryel B, Pudelko A, Adamczyk J, Fischer I, Malecki A. Calcineurin and Erk1/2-signaling pathways are involved in the antiapoptotic effect of cyclosporin A on astrocytes exposed to simulated ischemia in vitro. Naunyn Schmiedebergs Arch Pharmacol 2006; 374:127-39. [PMID: 17021852 DOI: 10.1007/s00210-006-0106-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2006] [Accepted: 08/22/2006] [Indexed: 01/02/2023]
Abstract
The present study focused on mechanisms involved in the anti-apoptotic effect of cyclosporin A (CsA) towards ischemic injured astrocytes in vitro [under combined oxygen glucose deprivation (OGD)]. We investigated whether this action might be mediated through activation of extracellular signal regulated kinases 1 and 2 (Erk1/2) or attenuation of calcineurin (CaN) by immunosuppressant in ischemic astrocytes. Additionally, the influence of CsA on phosphorylation of Akt kinase was determined. After 21 days of in vitro culture, astrocytes were subjected to OGD (for 8 h) and CsA (0.25-10 microM); 0.25 microM CsA distinctly stimulated the Erk1/2 pathway in astrocytes exposed to OGD. This protective effect of CsA was strongly associated with CaN inhibition, increased expression of anti-apoptotic factors such as Bcl-X(L) and NF-kappaB, as well as suppression of caspase-3 activity. Maximum p-Akt kinase expression was observed following treatment with 1 microM CsA. Finally, we also demonstrated that the beneficial effect of CsA at a concentration of 10 microM is related mainly to strong CaN inhibition. The results obtained suggest that, depending on the concentration used, CsA might act as a protective agent towards ischemia-injured astroglial cells through alternative intracellular pathways associated with increased p-Erk1/2 and p-Akt expression or CaN inactivation.
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Affiliation(s)
- Bozena Gabryel
- Department of Pharmacology, Silesian University School of Medicine, Katowice, Poland.
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