Acute Toxicity of DW-166HC (Hlolmium-165-chitosan) in Mice

마우스에서의 DW-166HC (Ho1mium-165-chitosan)에 대한 급성독성

  • Lee, Won-Yong (Central Research Laboratories, Dong Wha Pharm. Ind., Co., Ltd.) ;
  • Lee, Jin (Central Research Laboratories, Dong Wha Pharm. Ind., Co., Ltd.) ;
  • Moon, Eun-Yi (Central Research Laboratories, Dong Wha Pharm. Ind., Co., Ltd.) ;
  • Nam, Soon-Chul (Central Research Laboratories, Dong Wha Pharm. Ind., Co., Ltd.) ;
  • Lee, Dug-Keun (Central Research Laboratories, Dong Wha Pharm. Ind., Co., Ltd.) ;
  • Yoon, Sung-June (Central Research Laboratories, Dong Wha Pharm. Ind., Co., Ltd.)
  • 이원용 (동화약품공업(주)중앙연구소) ;
  • 이진 (동화약품공업(주)중앙연구소) ;
  • 문은이 (동화약품공업(주)중앙연구소) ;
  • 남순철 (동화약품공업(주)중앙연구소) ;
  • 이덕근 (동화약품공업(주)중앙연구소) ;
  • 윤성준 (동화약품공업(주)중앙연구소)
  • Published : 1997.03.01

Abstract

DW-166HC ($^{166}$Holmium-chitosan) is a complex of $^{166}$Ho, $\beta$- and $\gamma$-ray emitter, and chitosan, a polymer of glucosamine, with radiotherapeutic potential. The current study was performed to determine the acute toxicities of $^{165}$Ho-chitosan in mice by two different routes of administration. The both sex mice were given a single intravenous bolus injection of $^{165}$Ho-chitosan complex at doses of 12, 10, 6, 5 and 4 mg/kg or subcutaneous administration at doses of 600, 500, 400 and 300 mg/kg. Chitosan was dosed to control animals as 16 and 800 mg/kg, intravenously and subcutaneously, respectively. The doses of $_{165}$Ho-chitosan complex were expressed as $_{165}$holmium nitrate pentahydrate and the ratio of $^{165}$Ho$(NO_3)_3$).$5H_2O$ to chitosan was 3/4 Severe convulsion and respiratory failure were followed by death within 10 min after intravenous dosing. Transient unilateral hindlimb hypokinesias were found in two mice of 5 mg/kg dosing group during the study period. No abnormalities were observed during the necropsy of survived animals in intravenous dosing group. Only one male animal was found dead in 500 mg/kg subcutaneously dosed group. Alopecia with or without cutaneous ulcer were found in most mice including control animals. During necropsy, omental adhesion was observed in all dose ranges and enlarged spleen was found in several animals including control group. It is suggested that the acute intravenous >).$LD_{50}s$ for male and female mice were 4.90 and 6.03 mg/kg, respectively. The lowest lethal dose in male was 500 mg/kg by subcutaneous administration.

Keywords