CaPKR-like在鲫鱼与草鱼组织中的表达特性分析

摘要：PKR是由干扰素诱导的最重要的抗病毒蛋白之一，能抑制细胞和病毒蛋白的合成。鲫鱼PKR基因(CaPKR-like)是鱼类第一个，也是非哺乳类脊椎动物第一个报道的PKR全长cDNA序列。本研究制备了CaPKR-like N-端包含Za结构域的多克隆抗体，采用Western blots检验PKR-like在鲫鱼和草鱼组织中的表达特性。Western blots显示在未诱导的鲫鱼和草鱼中该基因表达水平非常低，但是经Poly I:C免疫一周后，在鲫鱼和草鱼等8种组织中有较强的PKR-like蛋白产生。结果暗示：CaPKR-like与哺乳类PKR有相同的组织表达特性。。

Characterization of CaPKR-like Expression in Tissues from Crucian and Grass Carp

Double-stranded RNA activated protein kinase (PKR) is an important antiviral protein induced by interferon (IFN). PKR was discovered as the enzyme responsible for inhibition of protein synthesis. CaPKR-like is the first fish PKR-like gene isolated from crucian carp. In the present study, the expression of CaPKR-like in the tissues of crucian and grass carp were analyzed by Western blots. In both species, CaPKR-like had a very low level of constitutive expression in un-stimulated tissues, but was up-regulated in all tissues tested in animals stimulated with Poly I:C for seven days. The expression analysis revealed the same characterization of CaPKR-like as mammalian PKR genes.