The therapeutic efficacy of edaravone in extensively burned rats.

Abstract

BACKGROUND:

Extensive burn injury leads to production of free radicals subsequent to massive fluid resuscitation, which in turn increases the risk of acute lung injury. Edaravone (3-methyl-1-phenyl-2-pyrazolin-5-one), a novel free radical scavenger, is clinically effective in improving the prognosis after cerebral infarction. However, the effect of edaravone against extensive burn injury has not been tested. Objected To evaluate whether edaravone can reduce free radical precursors in a 30% burn model in rats.

DESIGN:

Prospective, randomized controlled experiment.

SETTING:

Animal basic science laboratory.

SUBJECTS:

Male Wistar rats weighing 200 to 220 g.

MAIN OUTCOME MEASURES:

All rats (n = 10) were given a 30% full-thickness burn according to the Walker and Mason method. Immediately after the burn, edaravone was injected into the rats (n = 5) intraperitoneally at a dose of 9 mg/kg. One hour after burn injury, blood and tissue samples were collected to analyze free radical changes of serum and tissue malondialdehyde (MDA) and xanthine oxidase (XOD) and lung white blood cells.

RESULTS:

Statistical significance was found between nontreatment and edaravone treatment relative to serum MDA (mean +/- SD, 2.50 +/- 0.54 vs 1.74 +/- 0.29 nmol/mL), serum XOD (mean +/- SD, 5.04 +/- 1.67 vs 2.26 +/- 0.83 U/L), tissue MDA (mean +/- SD, 1268.7 +/- 289.9 vs 569.1 +/- 135.9 nmol/mg protein), tissue XOD (mean +/- SD, 256.3 +/- 58.1 vs 50.96 +/- 19.60 mU/g tissue), lung white blood cells (mean +/- SD, 3088 +/- 1144 vs 1542 +/- 575 mU/g tissue), and lung XOD (mean +/- SD, 428.3 +/- 210.5 vs 81.8 +/- 36.0 nmol/mg protein).

CONCLUSIONS:

Edaravone treatment induces significant reduction of free radical precursors and their metabolites compared with controls in burn rats. This suggests that edaravone could be helpful in the clinical treatment of large burns.

• Authors: Takeo Koizumi, Hideharu Tanaka, Seiki Sakaki, Shuji Shimazaki
• Journal: Archives of surgery (Chicago, Ill. : 1960) (Arch Surg) Vol. 141 Issue 10 Pg. 992-5 (Oct 2006) ISSN: 0004-0010 [Print] United States
• PMID: 17043277 (Publication Type: Evaluation Study, Journal Article)

Chemical References

• Free Radical Scavengers
• Free Radicals
• Malondialdehyde
• Xanthine Oxidase
• Edaravone
• Antipyrine

Topics

• Animals
• Antipyrine (analogs & derivatives, pharmacology, therapeutic use)
• Burns (drug therapy)
• Disease Models, Animal
• Edaravone
• Free Radical Scavengers (pharmacology, therapeutic use)
• Free Radicals
• Lung (chemistry)
• Male
• Malondialdehyde (blood)
• Prospective Studies
• Random Allocation
• Rats
• Rats, Wistar
• Xanthine Oxidase (blood)