日本科学家最近通过实验发现,人体中含有至少23种可以被笑激活的基因。这一发现为“笑是良药”的说法找到了一定科学根据。这23种基因中,有18种与免疫反应、信号转换和细胞周期有关,另外5种基因的功能尚未查明。人们通常认为基因是永久不变的,但事实上很多基因处于休眠状态或者 Japanese scientists recently found through experiments that the body contains at least 23 genes that can be activated by laughter. This discovery found a certain scientific basis for the saying that laughter is good medicine. Of the 23 genes, 18 are related to immune responses, signal transduction and cell cycle, and the function of the other five genes has not yet been identified. Genes are often thought of as immutable, but in fact many genes are dormant or