Role of blood transfusion in trichosanthin-induced anaphylaxis

被引:1
作者
Chan, HM [1 ]
Tam, SC [1 ]
机构
[1] Chinese Univ Hong Kong, Fac Med, Dept Physiol, Shatin, Hong Kong, Peoples R China
关键词
trichosanthin; anaphylaxis; immunogenicity; blood transfusion; ribosome inactivating protein;
D O I
10.1016/j.etap.2004.10.005
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Trichosanthin (TCS) is a type I ribosome inactivating protein extracted from Chinese medicinal herb. It possesses various biological functions such as abortifacient, anti-tumor and anti-viral activities. Clinical trial of this compound against human immunodeficiency virus (HIV) had been conducted. However, its use is limited by its high immunogenicity that elicits hypersensitivity reaction. This may lead to fatal anaphylactic response. The study described an approach of using blood transfusion to reduce TCS induced anaphylaxis in rats using a cross-circulation model. A TCS-sensitized Sprague Dawley rat was connected to a normal rat via the femoral vessels in a cross-circulation circuit before antigenic challenge. The donor rat served as a blood exchange basin to lower the level of the blood-borne components responsible for the anaphylactic reaction in the sensitized rat. Our results showed that cross-circulation shortened the duration of circulatory hypotension and reduced mortality of TCS induced anaphylaxis. The control group not undergoing cross-circulation had a mortality of 50% at 2 h post-TCS challenge and there was no mortality in the cross-circulation group. This demonstrated that prior blood transfusion call be one of the alternatives to reduce anaphylactic response of TCS. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:73 / 76
页数:4
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