5-氟脲嘧啶(5-Fu)是一种具有杀伤肿瘤细胞及放射增敏作用的药物,常用于结、直肠癌的治疗。由于传统是经静脉给药,疗效不够满意,且全身毒性反应大,受机体耐受性的限制。近年来,尽管人们对5-Fu化疗给药途径进行了许多临床研究,但在放射增敏治疗方面,没有新的突破。为 5-Fluorouracil (5-Fu) is a drug that kills tumor cells and enhances radiosensitization. It is commonly used in the treatment of colorectal cancer. Due to the traditional intravenous administration, the curative effect is not satisfactory, and the systemic toxicity is large, and is limited by the tolerance of the body. In recent years, although people have conducted many clinical studies on the administration of 5-Fu chemotherapy, there have been no new breakthroughs in radiosensitization therapy. for