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第41卷第7期 南京医科大学学报(自然科学版)
2021年7月 Journal of Nanjing Medical University(Natural Sciences) ·937 ·
·基础医学·
成年小鼠ECSIT 3′⁃UTR的鉴定及功能分析
周小蓉,陆 霞,李建涛,阙玲琍,李跃华 *
南京医科大学心血管病转化医学协同创新中心,江苏 南京 211166
[摘 要] 目的:鉴定成年小鼠 Toll 途径进化保守信号介导因子(evolutionarily conserved signaling intermediate in Toll path⁃
ways,ECSIT)的3′非翻译区(3′⁃untranslated region,3′⁃UTR)序列,并在细胞中验证非编码RNA对ECSIT表达的影响。方法:采
用 RACE 技术克隆得到小鼠 ECSIT 3′⁃UTR 序列,并与基因组数据库进行比对;预测 ECSIT 3′⁃UTR 可能结合的微小 RNA(mi⁃
croRNA,miRNA),并针对ECSIT的全长序列设计小干扰RNA(siRNA);通过Western blot分别检测使用不同miRNA和siRNA干
扰后,细胞中ECSIT的表达。结果:成功鉴定了346 bp的小鼠ECSIT 3′⁃UTR,与NCBI上序列一致率达到99%;在细胞中miR⁃7⁃
5p和siRNA1、2可以干扰ECSIT的表达。结论:成功鉴定得到成年小鼠心脏ECSIT mRNA 3′⁃UTR序列,该非编码区可作为非编
码RNA的调控区域,为进一步从分子水平探明ECSIT在小鼠生长发育及疾病中的作用提供科学依据。
[关键词] 3′非翻译区;3′RACE;ECSIT;microRNA;siRNA
[中图分类号] Q756 [文献标志码] A [文章编号] 1007⁃4368(2021)07⁃937⁃06
doi:10.7655/NYDXBNS20210701
Identification and functional analysis of ECSIT 3′⁃UTR in adult mice
ZHOU Xiaorong,LU Xia,LI Jiantao,QUE Lingli,LI Yuehua *
Collaborative Innovation Center For Cardiovascular Disease Translational Medicine,Nanjing Medical University,
Nanjing 211166,China
[Abstract] Objective:This study aims to identify the 3′⁃UTR sequence of the ECSIT spliceosome in adult mice,and verify the
effects of non⁃coding RNA on ECSIT expression. Methods:Using RACE technology to clone the mice ECSIT 3′⁃UTR non⁃coding
region sequence,and further compare with the genomic database. Predict the possible binding microRNAs,and design siRNA against
the full⁃length sequence of ECSIT. The expression levels of ECSIT in cells were determined by Western blot after using different
microRNAs and siRNAs. Results:The results show that the 346 bp mouse ECSIT 3′ ⁃ UTR was successfully identified and the
sequence consistency rate with NCBI reached 99%. In cells,miR⁃7⁃5p and siRNA1,2 can interfere with the expression of ECSIT.
Conclusion:These results shows that the 3′⁃UTR sequence of mouse ECSIT mRNA was successfully identified and this non⁃coding
region can be used as a regulatory region of non⁃coding RNA,which can provide a scientific basis at the molecular level for further
proving research of ECSIT in mouse growth and pathophysiological condition.
[Key words] 3′⁃UTR;3′RACE;ECSIT;microRNA;siRNA
[J Nanjing Med Univ,2021,41(07):937⁃942]
基因表达的调控大多数发生在转录过程中, 码区末端的终止密码子延伸至多聚A尾巴(poly A)
mRNA 的稳定性、定位和可翻译性在这一过程发挥 的前端 ,3′⁃UTR 包含大量的调控元件,具有调节
[2]
[1]
重要作用 。3′非翻译区(3′⁃untranslated region,3′⁃ mRNA稳定性、定位、翻译以及介导蛋白与蛋白的相
UTR)是mRNA非编码区的一部分,其碱基长度从编 互作用等功能 [3-4] ,通过 3′⁃UTR 调节转录后的基因
表达对维持细胞的内稳态非常重要。
[基金项目] 国家自然科学基金(82070234) Toll 途径进化保守信号介导因子 ECSIT(evolu⁃
∗
通信作者(Corresponding author),E⁃mail:yhli@njmu.edu.cn tionarily conserved signaling intermediate in Toll path⁃