Amelioration of superoxide dismutase on ventilator-induced lung injury by suppressing leukocyte in the lungs and systemic circulation

Chien-Ling Su, Wen Yuan Du, Ling Ling Chiang, Yen-Kuang Lin, Hui Ling Lee, Kuan Hao Chen, Jiun Jr Wang, David Wang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Superoxide dismutase (SOD) is a free radical scavenger and a broad-spectrum antioxidant. Its anti-inflammatory and immunomodulatory effects have recently been noted. We studied the effects of this antioxidant on lung damage, oxidative stress, and inflammation in a model of ventilator-induced lung injury (VILI), using 8- to 12-wk-old Sprange-Dawley rats (n = 40). Animals were randomized and evenly divided into two experimental groups, low tidal volume (VT) ventilation (VT = 9 ml/kg) and high VT ventilation (VT = 28 ml/kg). Each group was evenly divided into two subgroups: ten animals were treated with superoxide dismutase (SOD; 10,000 U/kg iv, 2 h prior to the ventilation) and the rests were treated with vehicle. Lung injury was evaluated by histological examination, and cells counts of red blood cells (RBC) and white blood cells (WBC) in the alveoli and the septal wall thickness in lung tissues and serum lactate dehydrogenase (LDH). The lung permeability was assessed by the wet-to-dry weight ratio (W/D), lung weight to body weight ratio (LW/BW) and protein concentration in broncholavage fluid (BALF). Levels of oxidative stress and lipid peroxidation in the lungs were evaluated by tissue malondialdehyde (MDA) and methylguanidine (MG) in BALF, respectively. SOD pretreatment significantly decreased WBC counts in systemic circulation and in alveoli, and effectively attenuated high VT ventilation induced lung injury by reducing hyaline membrane development, septal wall thickness, lung W/D and LW/BW and serum LDH in relation to those of the control. In addition, lung tissue MDA and MG in BALF were also notably reduced.

Original languageEnglish
JournalChinese Journal of Physiology
Volume56
Issue number4
DOIs
Publication statusPublished - 2013

Fingerprint

Ventilator-Induced Lung Injury
Superoxide Dismutase
Leukocytes
Lung
Ventilation
Methylguanidine
Lung Injury
Malondialdehyde
L-Lactate Dehydrogenase
Weights and Measures
Oxidative Stress
Antioxidants
Body Weight
Free Radical Scavengers
Erythrocyte Count
Hyalin
Tidal Volume
Serum
Leukocyte Count
Lipid Peroxidation

Keywords

  • Endothelial bound SOD
  • Image processing
  • Leukocyte suppression
  • Oxidative stress

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Amelioration of superoxide dismutase on ventilator-induced lung injury by suppressing leukocyte in the lungs and systemic circulation. / Su, Chien-Ling; Du, Wen Yuan; Chiang, Ling Ling; Lin, Yen-Kuang; Lee, Hui Ling; Chen, Kuan Hao; Wang, Jiun Jr; Wang, David.

In: Chinese Journal of Physiology, Vol. 56, No. 4, 2013.

Research output: Contribution to journalArticle

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abstract = "Superoxide dismutase (SOD) is a free radical scavenger and a broad-spectrum antioxidant. Its anti-inflammatory and immunomodulatory effects have recently been noted. We studied the effects of this antioxidant on lung damage, oxidative stress, and inflammation in a model of ventilator-induced lung injury (VILI), using 8- to 12-wk-old Sprange-Dawley rats (n = 40). Animals were randomized and evenly divided into two experimental groups, low tidal volume (VT) ventilation (VT = 9 ml/kg) and high VT ventilation (VT = 28 ml/kg). Each group was evenly divided into two subgroups: ten animals were treated with superoxide dismutase (SOD; 10,000 U/kg iv, 2 h prior to the ventilation) and the rests were treated with vehicle. Lung injury was evaluated by histological examination, and cells counts of red blood cells (RBC) and white blood cells (WBC) in the alveoli and the septal wall thickness in lung tissues and serum lactate dehydrogenase (LDH). The lung permeability was assessed by the wet-to-dry weight ratio (W/D), lung weight to body weight ratio (LW/BW) and protein concentration in broncholavage fluid (BALF). Levels of oxidative stress and lipid peroxidation in the lungs were evaluated by tissue malondialdehyde (MDA) and methylguanidine (MG) in BALF, respectively. SOD pretreatment significantly decreased WBC counts in systemic circulation and in alveoli, and effectively attenuated high VT ventilation induced lung injury by reducing hyaline membrane development, septal wall thickness, lung W/D and LW/BW and serum LDH in relation to those of the control. In addition, lung tissue MDA and MG in BALF were also notably reduced.",
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AB - Superoxide dismutase (SOD) is a free radical scavenger and a broad-spectrum antioxidant. Its anti-inflammatory and immunomodulatory effects have recently been noted. We studied the effects of this antioxidant on lung damage, oxidative stress, and inflammation in a model of ventilator-induced lung injury (VILI), using 8- to 12-wk-old Sprange-Dawley rats (n = 40). Animals were randomized and evenly divided into two experimental groups, low tidal volume (VT) ventilation (VT = 9 ml/kg) and high VT ventilation (VT = 28 ml/kg). Each group was evenly divided into two subgroups: ten animals were treated with superoxide dismutase (SOD; 10,000 U/kg iv, 2 h prior to the ventilation) and the rests were treated with vehicle. Lung injury was evaluated by histological examination, and cells counts of red blood cells (RBC) and white blood cells (WBC) in the alveoli and the septal wall thickness in lung tissues and serum lactate dehydrogenase (LDH). The lung permeability was assessed by the wet-to-dry weight ratio (W/D), lung weight to body weight ratio (LW/BW) and protein concentration in broncholavage fluid (BALF). Levels of oxidative stress and lipid peroxidation in the lungs were evaluated by tissue malondialdehyde (MDA) and methylguanidine (MG) in BALF, respectively. SOD pretreatment significantly decreased WBC counts in systemic circulation and in alveoli, and effectively attenuated high VT ventilation induced lung injury by reducing hyaline membrane development, septal wall thickness, lung W/D and LW/BW and serum LDH in relation to those of the control. In addition, lung tissue MDA and MG in BALF were also notably reduced.

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