神经酰胺是一种脂质分子，通常存在于在细胞的胞膜上，并且能够调节细胞的功能：包括细胞老化或衰老。
Ceramide is a lipid molecule naturally present in the cell's plasma membrane and controls cell functions, including cell aging, or senescence.
端粒和端粒酶是现代生物学研究的热点，端粒的缺失与细胞的衰老，端粒酶的活性与细胞的老化及癌化均有密切的关系。
Telomere and telomerase are the focus of modern biological study. There are close relationships among telomere loss and cell ageing, activation of telomerase, cell senescence and immortalization.
生命钟基因控制着细胞程序衰老。 生物体细胞内存在一系列基因，它们控制着细胞的生长、分化、老化和死亡。
There are a series of genes in cell which determin cellular growth, differentiation, aging and death (3) Critical telomere shortening.
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