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Zhou LY, Tian ZR, Yao M, Chen XQ, Song YJ, Ye J, Yi NX, Cui XJ, Wang YJ. Riluzole promotes neurological function recovery and inhibits damage extension in rats following spinal cord injury: a meta-analysis and systematic review. J Neurochem 2019; 150:6-27. [PMID: 30786027 DOI: 10.1111/jnc.14686] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/03/2019] [Accepted: 02/15/2019] [Indexed: 12/24/2022]
Abstract
Spinal cord injury (SCI) is a devastating condition that has few treatment options. Riluzole, a sodium channel blocker used to treat amyotrophic lateral sclerosis, has been initially trialed in human SCI. We performed a systematic review to critically assess the efficacy of riluzole in locomotor recovery and damage extension in SCI rat models, and the potential for clinical translation. PubMed, Embase, Cochrane Library, and Chinese databases were searched from their inception date to March 2018. Two reviewers independently selected animal studies that evaluated neurological recovery and lesion area following riluzole treatment in SCI rat models, extracted data and assessed methodological quality. Pairwise meta-analysis, subgroup analysis, and network meta-analysis were performed to assess the effects of riluzole on SCI. Ten eligible studies were included. Two studies had high methodological quality. Overall, the Basso, Beattie, and Bresnahan scores were increased in riluzole-treated animals versus controls, and effect sizes showed a gradual increase from the 1st (five studies, n = 104, mean difference = 1.24, 95% CI = 0.11 to 2.37, p = 0.03) to 6th week after treatment (five studies, n = 120, mean difference = 2.34, 95% CI = 1.26 to 3.42, p < 0.0001). Riluzole was associated with improved outcomes in the inclined plane test and the tissue preservation area. Subgroup analyses suggested an association of locomotor recovery with riluzole dose. Network meta-analysis showed that 5 mg/kg riluzole exhibited greater protection than 2.5 and 8 mg/kg riluzole. Collectively, this review suggests that riluzole has a protective effect on SCI, with good safety and a clear mechanism of action and may be suitable for future clinical trials or applications. However, animal results should be interpreted with caution given the known limitations in animal experimental design and methodological quality.
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Affiliation(s)
- Long-Yun Zhou
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Rehabilitation Medicine College, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zi-Rui Tian
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Min Yao
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xu-Qing Chen
- Affiliated Hospital of Nanjing University of Traditional Chinese Medicine, Nanjing, China
| | - Yong-Jia Song
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jie Ye
- Department of Orthopedics and Traumatology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Nan-Xing Yi
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xue-Jun Cui
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yong-Jun Wang
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Üstün Bezgin S, Uygur KK, Gökdoğan Ç, Elmas Ç, Göktaş G. The Effects of Riluzole on Cisplatin-induced Ototoxicity. Int Arch Otorhinolaryngol 2019; 23:e267-e275. [PMID: 31360245 PMCID: PMC6660296 DOI: 10.1055/s-0038-1676654] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 10/21/2018] [Indexed: 01/06/2023] Open
Abstract
Introduction
Riluzole (2-amino-6-trifluoromethoxy benzothiazole) is known as a neuroprotective, antioxidant, antiapoptotic agent. It may have beneficial effects on neuronal cell death due to cisplatin-induced ototoxicity.
Objective
To evaluate the effect of riluzole on cisplatin-induced ototoxicity in guinea pigs.
Methods
Twenty-four guinea pigs, studied in three groups, underwent auditory brainstem response evaluation using click and 8 kHz tone burst stimuli. Subsequently, 5 mg/kg of cisplatin were administered to all animals for 3 days intraperitoneally (i.p.) to induce ototoxicity. Half an hour prior to cisplatin, groups 1, 2 and 3 received 2 ml of saline i.p., 6 mg/kg of riluzole hydrochloride i.p., and 8 mg/kg of riluzole hydrochloride i.p., respectively, for 3 days. The auditory brainstem responses were repeated 24 hours after the last drug administration. The cochleae were analyzed by transmission electron microscopy (TEM).
Results
After drug administiration, for 8,000 Hz stimulus, group 1 had significantly higher threshold shifts when compared with groups 2 (
p
< 0.05) and 3 (
p
< 0.05), and there was no significant difference in threshold shifts between groups 2 and 3 (
p
> 0.05). Transmission electron microscopy findings demonstrated the protective effect of riluzole on the hair cells and the stria vascularis, especially in the group treated with 8 mg/kg of riluzole hydrochloride.
Conclusion
We can say that riluzole may have a protective effect on cisplatin- induced ototoxicity. However, additional studies are needed to confirm these results and the mechanisms of action of riluzole.
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Affiliation(s)
- Selin Üstün Bezgin
- Department of Otorhinolaryngology, Kanuni Sultan Süleyman Education and Research Hospital, İstanbul, Turkey
| | - Kadir Kemal Uygur
- Department of Otorhinolaryngology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Çağıl Gökdoğan
- Department of Otorhinolaryngology, Muğla Sıtkı Koçman University Faculty of Medicine, Muğla, Turkey
| | - Çiğdem Elmas
- Department of Histology and Embryology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Güleser Göktaş
- Department of Histology and Embryology, Lokman Hekim University, Faculty of Medicine, Ankara, Turkey
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Effect of manganese and manganese plus noise on auditory function and cochlear structures. Neurotoxicology 2016; 55:65-73. [DOI: 10.1016/j.neuro.2016.05.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/20/2016] [Accepted: 05/20/2016] [Indexed: 01/09/2023]
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Wang T, Li X, Yang D, Zhang H, Zhao P, Fu J, Yao B, Zhou Z. ER stress and ER stress-mediated apoptosis are involved in manganese-induced neurotoxicity in the rat striatum in vivo. Neurotoxicology 2015; 48:109-19. [PMID: 25732873 DOI: 10.1016/j.neuro.2015.02.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 01/14/2015] [Accepted: 02/20/2015] [Indexed: 11/28/2022]
Abstract
Manganese (Mn) is an essential trace element found in many enzymes, however, excessive Mn-exposure can result in manganism which is similar to Parkinson's movement disorder. The mechanisms of manganism are not well-known. The present in vivo study was carried out to determine whether endoplasmic reticulum stress (ER stress) and ER stress-mediated apoptosis are involved in manganese-induced neurotoxicity. Sixty-four SD rats were randomly divided into four groups and were administered intraperitoneally with normal saline (NS, as control) or MnCl₂ (7.5, 15 and 30 mg/kg body weight, respectively) for 4 weeks. We found that MnCl₂ dose-dependently accumulate in striatal. HE staining and TUNEL assay results indicated that MnCl₂ induced striatal neurocytes apoptosis in both male and female rats. The alterations of ultrastructures showed that MnCl₂ resulted in chromatin condensation, mitochondria and ER tumefaction in rat striatal neurocytes. Furthermore, MnCl₂ increased the expressions of p-IRE-1, ATF-6α, PERK, GRP78, Sigma-1R, CHOP, Bim, Bax, caspase-12 and caspase-3, and decreased the expression of Bcl-2 in rat striatal neurocytes. In conclusion, MnCl₂ could induce ER stress and ER stress-mediated apoptosis in rat striatal neurocytes, which might be one of the important mechanisms of Mn-induced neurotoxicity.
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Affiliation(s)
- Ting Wang
- Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China; Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food Safety, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China; The seventh people hospital of Zhengzhou, Zhengzhou Henan 450000, China
| | - Xuehui Li
- Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China; Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food Safety, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China
| | - Dongxu Yang
- Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China
| | - Hongtao Zhang
- Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China; Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food Safety, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China
| | - Peng Zhao
- Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China; Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food Safety, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China
| | - Juanling Fu
- Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China
| | - Biyun Yao
- Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China; Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food Safety, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China.
| | - Zongcan Zhou
- Department of Toxicology, School of Public Health, Peking University Health Science Center, Beijing 100191, PR China.
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Roth JA, Eichhorn M. Down-regulation of LRRK2 in control and DAT transfected HEK cells increases manganese-induced oxidative stress and cell toxicity. Neurotoxicology 2013; 37:100-7. [PMID: 23628791 DOI: 10.1016/j.neuro.2013.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 04/03/2013] [Accepted: 04/18/2013] [Indexed: 11/16/2022]
Abstract
The extra-pyramidal symptoms associated with manganism often overlap with that seen in Parkinsonism suggesting a common link between the two disorders. Since wide deviations are observed in susceptibility and characteristics of the symptoms observed in manganism, these differences may be due to underlying genetic variability. Genes linked to early onset of Parkinsonism which includes ATP13A2 and parkin have already been suggested to promote development of Mn toxicity. Of the other Parkinson-linked genes, mutations in LRRK2, an autosomal dominant gene, represent another likely candidate involved in the development of manganism. In this paper the effect of shRNA LRRK2 knock-down on Mn toxicity was examined in control and DAT transfected HEK293 cells. Results demonstrate that LRRK2 down-regulation potentiates Mn toxicity in both control and DAT-transfected cell as well as potentiates DA toxicity. Combined treatment of Mn and DA further augments cell toxicity, ROS production and JNK phosphorylation in LRRK2 deficient cells compared to controls. Consistent with studies demonstrating that LRRK2 plays a role in the phosphorylation of p38, our results similarly demonstrate a decrease in p38 activation in LRRK2 knock-down cells. Our findings suggest that null mutations in LRRK2 which cause Parkinsonism potentiate Mn toxicity and increase susceptibility to develop manganism.
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Affiliation(s)
- Jerome A Roth
- Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY 14214, USA.
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Xu B, Wu SW, Lu CW, Deng Y, Liu W, Wei YG, Yang TY, Xu ZF. Oxidative stress involvement in manganese-induced alpha-synuclein oligomerization in organotypic brain slice cultures. Toxicology 2013; 305:71-8. [DOI: 10.1016/j.tox.2013.01.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Revised: 01/12/2013] [Accepted: 01/16/2013] [Indexed: 02/07/2023]
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Abstract
Manganese (Mn) is an essential trace metal that is pivotal for normal cell function and metabolism. Its homeostasis is tightly regulated; however, the mechanisms of Mn homeostasis are poorly characterized. While a number of proteins such as the divalent metal transporter 1, the transferrin/transferrin receptor complex, the ZIP family metal transporters ZIP-8 and ZIP-14, the secretory pathway calcium ATPases SPCA1 and SPCA2, ATP13A2, and ferroportin have been suggested to play a role in Mn transport, the degree that each of them contributes to Mn homeostasis has still to be determined. The recent discovery of SLC30A10 as a crucial Mn transporter in humans has shed further light on our understanding of Mn transport across the cell. Although essential, Mn is toxic at high concentrations. Mn neurotoxicity has been attributed to impaired dopaminergic (DAergic), glutamatergic and GABAergic transmission, mitochondrial dysfunction, oxidative stress, and neuroinflammation. As a result of preferential accumulation of Mn in the DAergic cells of the basal ganglia, particularly the globus pallidus, Mn toxicity causes extrapyramidal motor dysfunction. Firstly described as "manganism" in miners during the nineteenth century, this movement disorder resembles Parkinson's disease characterized by hypokinesia and postural instability. To date, a variety of acquired causes of brain Mn accumulation can be distinguished from an autosomal recessively inherited disorder of Mn metabolism caused by mutations in the SLC30A10 gene. Both, acquired and inherited hypermanganesemia, lead to Mn deposition in the basal ganglia associated with pathognomonic magnetic resonance imaging appearances of hyperintense basal ganglia on T1-weighted images. Current treatment strategies for Mn toxicity combine chelation therapy to reduce the body Mn load and iron (Fe) supplementation to reduce Mn binding to proteins that interact with both Mn and Fe. This chapter summarizes our current understanding of Mn homeostasis and the mechanisms of Mn toxicity and highlights the clinical disorders associated with Mn neurotoxicity.
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Affiliation(s)
- Karin Tuschl
- Clinical and Molecular Genetics Unit, UCL Institute of Child Health, London, United Kingdom.
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