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近年来 ,老年人肿瘤患病率日渐增高 ,可能与老年人免疫机能低下 ,接触各种外界致癌因子时间较长等因素有关。保尔佳（Ｐｏｌｙｅｒｇａ）是从动物脾脏中提取的一种分子量为１０００～５０００道尔顿的特殊糖肽 ,已做为新一代抗癌药物而受到重视。已有研究表明 ,保尔佳直接抑制
In recent years, the prevalence rate of elderly cancers has been increasing, which may be related to factors such as low immunity of the elderly and exposure to various external carcinogenic factors. Polyerga is a special glycopeptide with a molecular weight of 1000-5000 Daltons extracted from the spleen of animals and has been taken as a new generation of anti-cancer drugs. Studies have shown that Paula directly suppresses