摘要： 细胞中不同的mRNA半寿期差异很大，mRNA的稳定性受到多种因素的影响，现在已经发现了许多对mRNA的稳定性有影响的顺式因子和反式因子。大量的研究证明在真核细胞内存在复杂的机制调节mRNA的稳定与降解及其所引起的基因表达。现在可以肯定在真核细胞中至少存在着三种mRNA的降解方式：依赖于脱腺苷酸的降解，无义密码介导的mRNA的降解和核酸内切酶的水解。其中依赖于脱腺苷酸的降解方式是细胞内大多数mRNA降解的主要途径。
Abstract The half-lives of different mRNAs in Eukaryotic cells vary greatly. There are many elements can influence mRNA stability, including cis-acting factors and trans-acting factors. Evidences show that there exist complicated mechanisms in cells that regulate mRNA stability, degradation and expression. Recent results have defined three mRNA degradation pathways in Eukaryotic cells: deadenylation-dependent mRNA decay, nonsense-mediated mRNA decay and endonuclolytic cleavage. Among these pathways deadenylation-dependent decay is the most general pathway.
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