The Effect of Pleurodesis with Doxycycline in the Rabbit

토끼에서 Doxycycline을 이용한 흉막유착 효과

  • Won, Kyoung-Sook (Department of Internal Medicine, National Medical Center) ;
  • Park, Keon-Uk (Department of Internal Medicine, National Medical Center) ;
  • Jeon, Won-Ho (Department of Internal Medicine, National Medical Center) ;
  • Baik, Jae-Jung (Department of Internal Medicine, National Medical Center) ;
  • Jeong, Yeon-Tae (Department of Internal Medicine, National Medical Center) ;
  • Suh, Jung-Il (Department of pathology, National Medical Center) ;
  • Son, Jin-Hee (Department of pathology, National Medical Center)
  • Published : 1994.10.31

Abstract

Background: The intrapleural instillation of tetracycline for pleural sclerosis had been most commonly used in patients with symptomatic malignant pleural effusion or recurrent pneumothorax for a long time. Unfortunately, at a time of expanding use of this agent, the production of injectable tetracycline hydrochloride used for pleurodesis was discontinued by its sole manufacturer in mid-1991 because the manufacturer was unable to meet US Food and Drug Administration purity standards. So we performed a preliminary study of doxycycline, as a alternative pleural sclerosant on rabbit pleura and compared its efficacy with that of tetracycline. Method: Eighteen New Zealand white rabbits weighing 2 to 3kg(mean 2.6kg) were devided into three groups. In each groups, one tetracycline(20 mg/ml/kg) and two doxycycline solutions(7 mg/ml/kg and 20 mg/ml/kg) instillated into the right pleural space through an 18-gauge angiocath with care to prevent pneumothorax. All rabbits were sacrificed after 28 days. Results: 1) In the group of tetracycline 20 mg/ml/kg(six rabbits), five rabbits showed partial pleural symphysis with several fibrous bands, and one rabbit died on 22th day. 2) In the group of doxycycline 7 mg/ml/kg(six rabbits), three rabbits showed partial pleural symphysis and the other three rabbits showed complete pleural symphysis without necrosis of underlying parenchymal lung tissue. 3) In the group of doxycycline 20 mg/ml/kg(six rabbits), two rabbits showed complete pleural symphysis without lung necrosis, another two rabbits showed complete pleural symphysis with lung necrosis, and the other two rabbits died on 4th and 13th day, respectively. Conclusion: We concluded that doxycycline is a highly effective sclerosing agent having stronger pleurodesis effect with that of tetracycline by dose base and its optimal dosage was considered as 7 mg/ml/kg with minimal complications.

연구배경 : Tetracycline의 흉막강내 주입은 오랫동안 악성 흉막삼출액이나 재발성 기흉을 가진 환자에게 화학적 흉막유착술의 가장 흔한 방법으로 사용되어왔다. 그러나 최근 주사용 tetracycline의 제조가 중단됨에 따라 이를 대체할만한 시약이 필요하게 되었으며, 이에 저자들은 같은 계열의 약제인 doxycycline을 토끼의 흉막강에 주입하여 이의 흉막유착효과를 tetracycline과 비교하고자 하였다. 방법: 평균 2.6 kg의 뉴질랜드 백색 토끼 18 마리를 여섯 마리씩 세 군으로 나누어 각 군에 tetracycline 20 mg/ml/kg, doxycycline 7 mg/ml/kg, doxycycline 20 mg/ml/kg를 우측 흉막강에 주입한 후 제 28일에 개흉술을 시행하여 흉막유착 정도를 비교하였다. 결과: 1) Tetracycline 20 mg/ml/kg를 주입한 여섯 마리의 토끼 중 다섯 마리는 여러 개의 섬유대에 의한 국소적인 흉막유착을 보였으며 나머지 한 마리는 사망하였다. 2) Doxycycline 7 mg/ml/kg를 주입한 여섯 마리의 토끼 중 세 마리는 국소적 흉막유착을 보였으며 나머지 세 마리는 섬유조직에 의한 치밀한 흉막유착을 보였다. 3) Doxycycline 20 mg/ml/kg를 주입한 여섯 마리의 토끼 중 두 마리는 치밀한 흉막유착을 보였으며, 다른 두 마리는 치밀한 흉막유착과 함께 기저 폐실질의 괴사를 보였고 나머지 두 마리는 사망하였다. 결론 : Doxycycline의 흉막유착효과는 tetracycline에 비해 대등하거나 더 강력한 것으로 생각되며, 7mg/ml/kg의 용량으로 별다른 부작용 없이 충분한 흉막유착효과가 얻어졌다.

Keywords