Effects of Vitamin C on Oxidative Stress Due to Anesthesia and Surgical Trauma in Dogs

개 마취와 수술 창상에 따른 산화스트레스에 대한 비타민 C의 효과

  • Choi, Kyeong-Ha (College of Veterinary Medicine, Chungnam National University) ;
  • Lee, Jae-Yeon (College of Veterinary Medicine, Chungnam National University) ;
  • Jeong, Seong-Mok (College of Veterinary Medicine, Chungnam National University) ;
  • Joo, Gregory K. (Cottman Animal Hospital) ;
  • Kim, Myung-Cheol (College of Veterinary Medicine, Chungnam National University)
  • 최경하 (충남대학교 수의과대학) ;
  • 이재연 (충남대학교 수의과대학) ;
  • 정성목 (충남대학교 수의과대학) ;
  • ;
  • 김명철 (충남대학교 수의과대학)
  • Accepted : 2011.10.06
  • Published : 2011.10.31

Abstract

The study evaluated the antioxidant effects of ascorbic acid (AA) against oxidative stress during laparotomy in dogs under general anesthesia using isoflurane. Twelve dogs were randomly assigned to either the ascorbic acid group (AAG) or the sham group (SG). AAG received intravenous dosage of 100 mg/animal of standard AA 10 minutes before anesthesia. Plasma levels of cortisol, glucose, total oxidant status (TOS), total antioxidant status (TAS), and oxidative stress index (OSI) were measured. Cortisol level increased significantly with time in both groups (p < 0.05). The change of glucose levels was not significantly different between both groups. TOS and OSI increased significantly with time in the SG (p < 0.05), whereas it did not significantly change with time in the AAG. The TOS and OSI of the AAG were significantly lower than in the SG (p < 0.05). However, TAS did not significantly change between both groups. The results suggest that the decrease of TOS in the AAG might be related to the conversion of antioxidants to oxidants. The decrease of OSI indicates that the decrease of reactive oxygen species (i.e., oxidative stress) produced at the site of injury is able to decrease surgical side effects of abnormal blood circulation, organ failure, and inflammation. Therefore, AA can be used to protect a surgical patient from oxidative stress in canine laparotomy.

이 연구는 개에서 isoflurane을 이용한 전신마취 하에 개복술시 아스코르빈산 (AA)의 항산화 효과를 평가하였다. 12마리의 개를 아스코르빈산 그룹 (AAG) 또는 sham 그룹 (SG)으로 무작위 배정하였다. AAG는 마취 10분 전 에 표준 아스코르빈산의 100 mg/animal 복용량을 정맥주사하였다. 혈장에 있는 코티졸, 포도당, total oxidant status (TOS), total antioxidant status (TAS)와 oxidative stress index (OSI)를 측정하였다. 코티졸 수치는 두 그룹에서 시간이 지남에 따라 유의성있게 증가하였다 (p < 0.05). 포도당 수치의 변화는 두 그룹 사이에 유의성이 없었다. TOS와 OSI는 SG에서 시간이 지남에 따라 유의성 있게 증가하였다 (p < 0.05). 그런데 AAG에서는 유의성있는 변화가 없었다. 그리고, AAG의 TOS와 OSI는 SG에서 보다 더 유의성 있게 낮았다 (p < 0.05). 그러나 TAS는 두 그룹 사이에 유 의성이 있는 변화가 없었다. 이런 결과는 AAG에서 TOS 감소가 항산화제에서 산화제로의 변환과 관련 있음을 예측 해 볼 수 있게 한다. OSI 감소는 손상부위에 발생한 활성산소 (ROS, 즉 산화 스트레스)의 감소가 혈액순환 이상, 기관 부전 및 염증의 수술 부작용을 줄일 수 있다는 것을 의미한다. 그러므로, AA는 개의 개복술에서 산화 스트레스로부터 수술환자를 보호하기 위하여 사용될 수 있다.

Keywords

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