PBN (&agr;-phenyl-tert-butylnitrone), and its derivatives nitrone-based free radical traps, significantly reduce preneoplastic nodule development as well as inhibit hepatocellular carcinoma (HCC) formation at very low levels. The involvement of reactive oxygen species (ROS) in cancer development has been strongly implicated for many years. The involvement of ROS has been strongly implicated in cancer development is a model system where feeding a choline deficiency (CD) diet to rats leads to hepatocellular carcinoma (HCC) development. Administering PBN in the drinking water inhibits HCC formation. Preneoplastic nodule growth in the liver is significantly suppressed by administering PBN, or some ofits natural metabolites, in the diet. The effectiveness of PBN in preventing HCC development in the CD liver model is considered due to its prevention of tumor development after the target cells have already been initiated, i.e.genetically changed into tumor cells. Administration of PBN (or its potent derivatives) to humans that may already have microscopic tumor preneoplastic nodules should prevent the eventual frank tumor formation.
PBN(&agr;-phenyl-tert-butylnitrone,苯基叔丁基硝酮)及其衍
生物硝基自由基捕获剂可显著减少肿瘤前结节的发展,并在极低
水平上抑制肝细胞癌(HCC)的形成。多年来,活性氧(ROS)与癌症发展的关系一直很密切。在一个模型系统中,给大鼠喂食
胆碱缺乏(CD)饮食会导致肝细胞癌(HCC)的发生,ROS 与癌症的发生发展有着密切的关系。在饮用
水中添加 PBN 可抑制 HCC 的形成。在饮食中添加 PBN 或其某些天然代谢物可显著抑制肝脏中肿瘤前结节的生长。在 CD 肝脏模型中,
多肽萘能有效防止 HCC 的发展,这是因为
多肽萘能在靶细胞已经开始生长(即
基因改变为肿瘤细胞)后防止肿瘤的发展。对已经出现微小肿瘤前瘤结节的人体施用 PBN(或其强效衍
生物),应能防止肿瘤最终形成。