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Sato Y, Matsumoto S, Ogata K, Bacal K, Nakatake M, Kitano T, Tokumaru O. The dose-response relationships of the direct scavenging activity of amide-based local anesthetics against multiple free radicals. J Clin Biochem Nutr 2023; 73:16-23. [PMID: 37534092 PMCID: PMC10390804 DOI: 10.3164/jcbn.22-131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 03/02/2023] [Indexed: 08/04/2023] Open
Abstract
This study aimed to illustrate the dose-response relationships of the direct scavenging activity of amide-based local anesthetics against multiple free radicals in vitro. We have demonstrated that amide-type local anesthetics selectively and directly scavenge some free radicals. Three kinds of free radicals were eliminated by all the four local anesthetics examined. Mepivacaine, lidocaine, bupivacaine, and dibucaine scavenged hydroxyl radicals in dose-dependent manners. Ascorbyl free radicals were also scavenged in dose-dependent manners, and lastly singlet oxygen was scavenged in dose-dependent manners. Three other free radicals were not scavenged by all of the four local anesthetics; tert-butoxyl radical was scavenged by all the anesthetics examined but dibucaine, nitric oxide by mepivacaine but not by the other three, and tyrosyl radical by mepivacaine and lidocaine but not by the other two. Some free radicals (superoxide anion, tert-butyl peroxyl radical, DPPH) were not scavenged by any of the four local anesthetics. The local anesthetics were also shown to inhibit lipid peroxidation by TBARS assay. These results suggest that local anesthetics have antioxidant properties through their free radical scavenging activities.
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Affiliation(s)
- Yukiko Sato
- Department of Fundamental Nursing, School of Nursing, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
| | - Shigekiyo Matsumoto
- Department of Anesthesiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
| | - Kazue Ogata
- Department of Physiology, Faculty of Welfare and Health Sciences, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Kira Bacal
- Medical Programme Directorate, Faculty of Medical and Health Sciences, University of Auckland, Bldg 507, 28 Park Ave, Grafton, Auckland 1010, New Zealand
| | - Misato Nakatake
- Department of Physiology, Faculty of Welfare and Health Sciences, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Takaaki Kitano
- Department of Anesthesiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
| | - Osamu Tokumaru
- Department of Physiology, Faculty of Welfare and Health Sciences, Oita University, 700 Dannoharu, Oita 870-1192, Japan
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Matsumoto S, Tokumaru O, Ogata K, Kuribayashi Y, Oyama Y, Shingu C, Yokoi I, Kitano T. Dose-dependent scavenging activity of the ultra-short-acting β1-blocker landiolol against specific free radicals. J Clin Biochem Nutr 2022; 71:185-190. [PMID: 36447489 PMCID: PMC9701591 DOI: 10.3164/jcbn.21-157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 05/11/2022] [Indexed: 08/04/2023] Open
Abstract
Landiolol, a highly cardioselective ultra-short-acting β1-blocker, prevents perioperative atrial fibrillation associated with systemic inflammation and oxidative stress. We evaluated the direct scavenging activity of landiolol against multiple free radical species. Nine free radical species (hydroxyl, superoxide anion, ascorbyl, tert-butyl peroxyl, tert-butoxyl, singlet oxygen, 2,2-diphenyl-1-picrylhydrazyl, nitric oxide, and tyrosyl radicals) were directly quantified using an X-band ESR spectrometer with the spin-trapping method. IC50 and reaction rate constants were estimated from the dose-response curve for each free radical. Landiolol scavenged six of the free radical species examined: hydroxyl radical (IC50 = 0.76 mM, k landiolol = 1.4 × 1010 M-1 s-1, p<0.001), superoxide anion (58 mM, 2.1 M-1 s-1, p = 0.044), tert-butoxyl radical (4.3 mM, k landiolol/k CYPMPO = 0.77, p<0.001), ascorbyl free radical (0.31 mM, p<0.001), singlet oxygen (0.69 mM, k landiolol/k 4-OH TEMP = 2.9, p<0.001), and nitric oxide (15 mM, 1.7 × 10 M-1 s-1, p<0.001). This study is the first to report that landiolol dose-dependently scavenges multiple free radical species with different reaction rate constants. These results indicate the potential clinical application of landiolol as an antioxidative and anti-inflammatory agent in addition to its present clinical use as an anti-arrhythmic agent.
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Affiliation(s)
- Shigekiyo Matsumoto
- Department of Anesthesiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
| | - Osamu Tokumaru
- Department of Physiology, Faculty of Welfare and Health Sciences, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Kazue Ogata
- Department of Anesthesiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
- Department of Physiology, Faculty of Welfare and Health Sciences, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Yoshihide Kuribayashi
- Department of Anesthesiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
| | - Yoshimasa Oyama
- Department of Anesthesiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
| | - Chihiro Shingu
- Department of Anesthesiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
| | - Isao Yokoi
- Department of Neurophysiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
| | - Takaaki Kitano
- Department of Anesthesiology, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
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Improving the hydrogen peroxide bleaching efficiency of aspen chemithermomechanical pulp by using chitosan. Carbohydr Polym 2015; 132:430-6. [PMID: 26256367 DOI: 10.1016/j.carbpol.2015.06.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 06/17/2015] [Accepted: 06/19/2015] [Indexed: 11/21/2022]
Abstract
The presence of transition metals during the hydrogen peroxide bleaching of pulp results in the decomposition of hydrogen peroxide, which decreases the bleaching efficiency. In this study, chitosans were used as peroxide stabilizer in the alkaline hydrogen peroxide bleaching of aspen chemithermomechanical pulp (CTMP). The results showed that the brightness of the bleached CTMP increased 1.5% ISO by addition of 0.1% chitosan with 95% degree of deacetylation during peroxide bleaching. Transition metals in the form of ions or metal colloid particles, such as iron, copper and manganese, could be adsorbed by chitosans. Chitosans could inhibit the decomposition of hydrogen peroxide catalyzed by different transition metals under alkaline conditions. The ability of chitosans to inhibit peroxide decomposition depended on the type of transition metals, chitosan concentration and degree of deacetylation applied. The addition of chitosan slightly reduced the concentration of the hydroxyl radical formed during the hydrogen peroxide bleaching of aspen CTMP.
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Nishida Y, Matsumoto S, Noguchi T, Narahara H. New evaluation of fetal oxidative stress: measurement of the umbilical cord blood dimethyl sulfate-induced ascorbyl-free radical by an electron spin resonance method. J Matern Fetal Neonatal Med 2013; 27:1550-4. [PMID: 24256134 DOI: 10.3109/14767058.2013.868427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aim is to evaluate intrapartum fetal oxidative stress in real-time by umbilical cord blood dimethyl sulfate (DMSO)-induced ascorbyl-free radical (AFR) measured by an electron spin resonance (ESR) method. METHODS Seventy-five mothers delivering at gestational age after 37 weeks were recruited. They were divided into three groups: spontaneous vaginal birth (n = 27), elective cesarean section (CS) (n = 34), and emergency CS due to non-reassuring fetal status (n = 14). Umbilical artery (UA) and venous (UV) cord blood gas analysis was performed. Serum levels of DMSO-induced AFR (AFR/DMSO) that reflect vitamin C concentrations were measured by ESR spectroscopy. RESULTS Blood gas analysis showed no significant differences among the groups. UA-AFR/DMSO level of elective CS group was significantly lower compared with spontaneous delivery group (0.32 ± 0.12 versus 0.46 ± 0.14, p < 0.005). Emergency CS group showed significantly lower levels of UA-AFR/DMSO compared with elective CS group (0.25 ± 0.11 versus 0.32 ± 0.12, p < 0.005). UV-AFR/DMSO levels had no significant difference among the groups. CONCLUSIONS It is suggested that fetal cord blood AFR/DMSO is a sensitive marker to assess fetal oxidative stress during delivery.
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Nishida Y, Matsumoto S, Noguchi T, Narahara H. New evaluation of fetal oxidative stress: measurement of the umbilical cord blood dimethyl sulfate-induced ascorbyl free radical by an electron spin resonance method. J Matern Fetal Neonatal Med 2012; 25:2499-502. [PMID: 22725842 DOI: 10.3109/14767058.2012.704448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aim is to evaluate intrapartum fetal oxidative stress in real-time by umbilical cord blood dimethyl sulfate (DMSO)-induced ascorbyl free radical (AFR) measured by an electron spin resonance (ESR) method. METHODS 75 mothers delivering at gestational age after 37 weeks were recruited. They were divided into three groups: spontaneous vaginal birth (n = 27), elective cesarean section (CS) (n = 34), and emergency CS due to non-reassuring fetal status (n = 14). Umbilical artery (UA) and venous (UV) cord blood gas analysis was performed. Serum levels of DMSO-induced AFR (AFR/DMSO) that reflect vitamin C concentrations, was measured by ESR spectroscopy. RESULTS Blood gas analysis showed no significant differences among the groups. UA-AFR/DMSO level of elective CS group was significantly lower compared with spontaneous delivery group (0.32 ± 0.12 vs. 0.46 ± 0.14, p < 0.005). Emergency CS group showed significantly lower levels of UA-AFR/DMSO compared with elective CS group (0.25 ± 0.11 vs. 0.32 ± 0.12, p < 0.005). UV-AFR/DMSO levels had no significant difference among the groups. CONCLUSIONS It is suggested that fetal cord blood AFR/DMSO is a sensitive marker to assess fetal oxidative stress during delivery.
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Affiliation(s)
- Yoshihiro Nishida
- Department of Obstetrics and Gynecology, Faculty of Medicine, Oita University, Oita, Japan.
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