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Manabe T, Matsumura A, Yokokawa K, Saito T, Fujikura M, Iwahara N, Matsushita T, Suzuki S, Hisahara S, Kawamata J, Suzuki H, Emoto MC, Fujii HG, Shimohama S. Evaluation of Mitochondrial Oxidative Stress in the Brain of a Transgenic Mouse Model of Alzheimer's Disease by in vitro Electron Paramagnetic Resonance Spectroscopy. J Alzheimers Dis 2020; 67:1079-1087. [PMID: 30714961 DOI: 10.3233/jad-180985] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Alzheimer's disease (AD) is one of the most common neurodegenerative diseases responsible for progressive dementia. Deposition of amyloid-β (Aβ) in the brain is the most important pathophysiological hallmark of AD. In addition, recent evidence indicates that reactive oxygen species (ROS) derived from mitochondria contribute to progression of AD pathology. We thus hypothesized that Aβ accumulates and oxidative stress increases in the brain mitochondria of a transgenic mouse model of AD (APdE9). We measured the quantity of Aβ and the activity of the antioxidant enzyme superoxide dismutase (SOD) in brain mitochondrial fractions prepared from APdE9 and wild-type (WT) mice aged 6, 9, 15, and 18 months. We also quantified the age-related changes in redox status in the mitochondrial fractions obtained from both APdE9 and WT mouse brains by electron paramagnetic resonance (EPR) spectrometry using a paramagnetic nitroxide "Mito-Tempo" [(2-(2,2,6,6-Tetramethylpiperidin-1-oxyl-4-ylamino)-2-oxoethyl) triphenylphosphonium chloride monohydrate] as a mitochondria-targeted redox-sensitive probe. In APdE9 mice, Aβ accumulated in brain mitochondria earlier than in the non-mitochondrial fraction of the brain. Furthermore, increased oxidative stress was demonstrated in brain mitochondria of APdE9 mice by in vitro SOD assay as well as EPR spectroscopy. EPR combined with a mitochondria-targeted redox-sensitive nitroxide probe is a potentially powerful tool to elucidate the etiology of AD and facilitate the development of new therapeutic strategies for AD.
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Affiliation(s)
- Tatsuo Manabe
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Akihiro Matsumura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Kazuki Yokokawa
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Taro Saito
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Mai Fujikura
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Naotoshi Iwahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Takashi Matsushita
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Syuuichirou Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Shin Hisahara
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Jun Kawamata
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Hiromi Suzuki
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Miho C Emoto
- Health Sciences University of Hokkaido, Sapporo, Japan
| | | | - Shun Shimohama
- Department of Neurology, School of Medicine, Sapporo Medical University, Sapporo, Japan
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KAMBAYASHI Y, TSUZUKI N, TOKUSHIGE H, KUSANO K. Comparison of oxidative stress under different propofol administration protocols in Thoroughbred racehorses by bOS and bAP assessment. J Equine Sci 2018; 29:75-78. [PMID: 30250395 PMCID: PMC6145865 DOI: 10.1294/jes.29.75] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/17/2018] [Indexed: 11/01/2022] Open
Abstract
It is desirable to reduce surgery-induced oxidative stress (OS) because it can cause immune suppression and delayed wound healing. Propofol is known to have antioxidant potential and to reduce OS in humans, but there have been no studies of this issue in horses. This study was conducted to evaluate OS under three different propofol administration protocols in Thoroughbred racehorses undergoing arthroscopic surgery with sevoflurane anesthesia. Blood oxidative stress (bOS) and blood antioxidant power (bAP) were used as OS biomarkers. Both bOS and bAP significantly decreased after surgery in all groups, but no differences in these reductions were found among them. Different propofol administration protocols with sevoflurane anesthesia did not cause a difference in OS in Thoroughbred racehorses that underwent arthroscopic surgery.
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Affiliation(s)
- Yoshinori KAMBAYASHI
- Racehorse Hospital, Miho Training Center, Japan
Racing Association, Ibaraki 300-0493, Japan
| | - Nao TSUZUKI
- Obihiro University of Agriculture and Veterinary
Medicine, Hokkaido 080-8555, Japan
| | - Hirotaka TOKUSHIGE
- Equine Research Institute, Japan Racing
Association, Tochigi 329-0412, Japan
| | - Kanichi KUSANO
- Racehorse Hospital, Miho Training Center, Japan
Racing Association, Ibaraki 300-0493, Japan
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Han C, Ding W, Jiang W, Chen YU, Hang D, Gu D, Jiang G, Tan Y, Ge Z, Ma T. A comparison of the effects of midazolam, propofol and dexmedetomidine on the antioxidant system: A randomized trial. Exp Ther Med 2015; 9:2293-2298. [PMID: 26136976 DOI: 10.3892/etm.2015.2410] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 03/18/2015] [Indexed: 11/06/2022] Open
Abstract
Previous studies on the antioxidant activity of sedatives have predominantly been in vitro investigations that are lacking clinical data, resulting in conclusion without cogency. The aim of the present prospective, randomized study was to use single sedative drugs for anesthesia induction to compare their antioxidant properties. The effects on the antioxidant system of midazolam, propofol and dexmedetomidine were assessed using oxidative stress indicators and micronuclei (MN). Forty-nine patients undergoing esophageal cancer radical prostatectomy were selected. Midazolam, propofol and dexmedetomidine were used to induce anesthesia. Venous blood samples were obtained prior to and at 2 and at 24 h after surgery, and oxidative stress indicators were detected using the appropriate kits. The cytokinesis-block micronucleus cytome assay was executed and the frequencies of MN, nucleoplasmic bridges and nuclear buds were examined. It was found that the use of the three sedatives, respectively, led to a marked increase in the levels of free radical indicators at 2 h after surgery, which then decreased at 24 h after surgery. Furthermore, lower levels of oxidative stress were found following the use of propofol and dexmedetomidine compared with those following midazolam administration, and similar results were obtained regarding the level of MN. It is suggested that propofol and dexmedetomidine exhibit a superior antioxidant function to midazolam.
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Affiliation(s)
- Chao Han
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Weiliang Ding
- Central Laboratory, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Wenjie Jiang
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Y U Chen
- Department of Anesthesiology, Jiangsu Province Hospital, Nanjing, Jiangsu 214200, P.R. China
| | - Dongyuan Hang
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Daming Gu
- Department of Anesthesiology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Guojun Jiang
- Department of Critical Care Medicine, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Yongfei Tan
- Department of Critical Care Medicine, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Zhijun Ge
- Department of Cardiac and Thoracic Surgery, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Tieliang Ma
- Central Laboratory, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
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