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Experimental study on the protective effects of edaravone against ischemic spinal cord injury  Kazuchika Suzuki, MD, Teruhisa Kazui, MD, PhD, Hitoshi.

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Presentation on theme: "Experimental study on the protective effects of edaravone against ischemic spinal cord injury  Kazuchika Suzuki, MD, Teruhisa Kazui, MD, PhD, Hitoshi."— Presentation transcript:

1 Experimental study on the protective effects of edaravone against ischemic spinal cord injury 
Kazuchika Suzuki, MD, Teruhisa Kazui, MD, PhD, Hitoshi Terada, MD, PhD, Kazuo Umemura, MD, PhD, Yasuhiko Ikeda, MD, PhD, Abul Hasan Muhammad Bashar, MBBS, PhD, Katsushi Yamashita, MD, PhD, Naoki Washiyama, MD, PhD, Takayasu Suzuki, MD, Kazuhiro Ohkura, MD, PhD, Junji Yasuike, MD  The Journal of Thoracic and Cardiovascular Surgery  Volume 130, Issue 6, Pages (December 2005) DOI: /j.jtcvs Copyright © 2006 The American Association for Thoracic Surgery Terms and Conditions

2 Figure 1 The putative reaction scheme of 2-[6-(4′-hydroxy)phenoxy-3H-xanthen-3-on-9-yl]benzoic acid (HPF). HPF, which is almost completely nonfluorescent, is o-dearylated on reaction with reactive oxygen species (ROS) to yield strongly fluorescent fluorescein. The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2006 The American Association for Thoracic Surgery Terms and Conditions

3 Figure 2 Neurologic status 24 and 48 hours after the beginning of reperfusion, as evaluated by using the Johnson recovery scale. Average scores represent means ± standard deviation. Group B had significantly higher scores in comparison with group A at 24 and 48 hours after the beginning of reperfusion (at 24 hours: *P = compared with group A; at 48 hours: **P = compared with group A). The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2006 The American Association for Thoracic Surgery Terms and Conditions

4 Figure 3 Histopathologic findings of the spinal cord sections stained with hematoxylin and eosin 48 hours after the beginning of reperfusion. Sections from each group were examined with 2 different magnifications. (Original magnification: left panel, 40×; right panel, 400×.) The spinal cord of sham control animals was intact. In group A spinal cords showed necrotic changes, including destruction and vacuolization of the gray matter. In group B the gray matter was largely preserved, with normal-looking motor neurons. The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2006 The American Association for Thoracic Surgery Terms and Conditions

5 Figure 4 The number of viable neurons in the gray matter of lumbar spinal cord sections stained with hematoxylin and eosin. Group B had significantly more viable neurons than group A (*P = .008 compared with group A). The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2006 The American Association for Thoracic Surgery Terms and Conditions

6 Figure 5 The fluorescence intensities of 2-[6-(4′-hydroxy)phenoxy-3H-xanthen-3-on-9-yl]benzoic acid at every 15 minutes from 15 to 180 minutes after the beginning of reperfusion. Intensities were significantly lower in group D at 75, 90, and 150 minutes after the beginning of reperfusion than in group C (at 75 minutes: *P = .0162; at 90 minutes: **P = ; at 150 minutes: #P = .0012). The Journal of Thoracic and Cardiovascular Surgery  , DOI: ( /j.jtcvs ) Copyright © 2006 The American Association for Thoracic Surgery Terms and Conditions


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