一、概述 机体在遭受外界有害因素的损伤时,常常通过自身的防御机构进行抵抗,使机体免遭或减轻伤害,这是众所周知的事实。对电离辐射的伤害,机体是否也有防护机构?它通过什么样的机制实现?在放射病治疗上有什么意义?是放射医学的课题之一。1969年认为机体自身对电离辐射有天然抗力,并指出这种抗力取决于机体内源性硫醇的水平。显 I. General It is a well-known fact that when the body suffers damages caused by harmful elements from the outside world, it often defends itself through its own defensive body so as to prevent or mitigate the body injury. The damage to ionizing radiation, whether the body also has a protective mechanism? It is through what mechanism to achieve? What is the significance of the treatment of radiation sickness? Radiation medicine is one of the topics. 1969 that the body itself has a natural resistance to ionizing radiation, and pointed out that this resistance depends on the body’s level of endogenous thiols. Significantly