畜牧兽医学报 ›› 2023, Vol. 54 ›› Issue (3): 1221-1228.doi: 10.11843/j.issn.0366-6964.2023.03.033

• 基础兽医 • 上一篇    下一篇

TET1基因对小鼠uNK细胞增殖及IFN-γ、VEGF-C和TGF-β1转录水平的影响

杨晓伟1,2,3, 赵自亮1, 付雨1, 于子肖1, 赵永聚2,3*   

  1. 1. 西南大学动物医学院, 重庆 402460;
    2. 西南大学动物科学技术学院, 重庆 400715;
    3. 草食动物科学重庆市重点实验室, 重庆 400715
  • 收稿日期:2022-08-08 出版日期:2023-03-23 发布日期:2023-03-21
  • 通讯作者: 赵永聚,主要从事草食牲畜遗传改良等领域的教学和研究工作,E-mail:zyongju@163.com
  • 作者简介:杨晓伟(1980-),女,吉林通化人,讲师,主要从事动物免疫学研究,E-mail: yangxiaowei396@163.com;赵自亮(1997-),男,云南普洱人,硕士生,主要从事动物免疫学研究,E-mail: 1948840202@qq.com。
  • 基金资助:
    国家自然科学基金(32002356);重庆市自然科学基金(cstc2019jcyj-msxmX0140);2021年国家级大学生创新创业项目(202110635014);重庆市科企联合体种质资源收集利用与品种试验项目(草食牲畜)

Effects of TET1 Gene on the Proliferation of Mouse uNK Cells and the Transcriptional Level of IFN-γ, VEGF-C and TGF-β1

YANG Xiaowei1,2,3, ZHAO Ziliang1, FU Yu1, YU Zixiao1, ZHAO Yongju2,3*   

  1. 1. College of Veterinary Medicine, Southwest University, Chongqing 402460, China;
    2. College of Animal Science and Technology, Southwest University, Chongqing, 400715, China;
    3. Chongqing Key Laboratory of Herbivore Science, Chongqing 400715, China
  • Received:2022-08-08 Online:2023-03-23 Published:2023-03-21

摘要: 本研究旨在了解去甲基化酶1(ten eleven translocation,TET1)对小鼠子宫内自然杀伤细胞(uterine natural killer, uNK)的增殖及其细胞因子分泌表达的影响。采集妊娠9~12 d小鼠子宫内膜,分离淋巴细胞,使用链霉亲和素磁珠法进一步分选uNK细胞进行培养;针对TET1基因合成RNA干扰序列,并将其连接入RNA干扰载体GM-19167,构建干扰表达质粒,包装成慢病毒(lentivirus)并进行病毒滴度的测定;按照慢病毒与细胞数(10~200)∶1的比例转染uNK细胞,168 h后荧光显微镜检测转染效果,收集uNK细胞,以β-actin为内参进行荧光定量PCR检测以验证TET1基因的干扰效果,利用Cell Counting Kit-8 (CCK8)对uNK细胞的增殖情况进行检测,分别合成γ干扰素(interferon-γ,IFN-γ)、血管内皮生长因子(vascular endothelial growth factor C,VEGF-C)和β1转化因子(transforming growth factor-β1,TGF-β1)3种细胞因子的检测引物,通过荧光定量PCR方法进行检测。结果发现,慢病毒感染168 h后uNK细胞中TET1的表达量显著下降(P<0.05);CCK8试验结果显示,与空载体病毒感染和空白对照组相比较,TET1干扰后其细胞增殖不受影响(P>0.05);荧光定量PCR检测结果显示,细胞因子TGF-β1的表达水平显著上升(P<0.01),而IFN-γ和VEGF-C两种细胞因子均显著下降(P<0.05)。下调TET1基因的表达不影响uNK细胞的正常增殖,但会影响其细胞因子的转录,进而对动物子宫内的天然免疫发挥重要作用。

关键词: TET1基因, uNK细胞, 细胞增殖, 细胞因子, 小鼠

Abstract: The purpose of this study was to evaluate the effect of ten eleven translocation 1 (TET1) on the proliferation and cytokine secretion and expression of mouse uterine natural killer (uNK) cells. The endometrium of pregnant mice was collected on gestational day 9-12, and lymphocytes were isolated. uNK cells were further sorted by streptavidin magnetic bead method for culture. The RNA interference sequence of TET1 gene was synthesized and connected to RNA interference vector GM-19167 to construct interference expression plasmid, then lentivirus was packaged and virus titer was determined. uNK cells were transfected according to the ratio of lentivirus to cell number of (10-200)∶1. After 168 h, the transfection effect was detected by fluorescence microscope. uNK cells were collected and fluorescent quantitative PCR (qPCR) method was used to verify the interference effect of TET1 gene while β- actin was used as an internal reference. Cell counting kit-8 (CCK8) was used to detect the proliferation of uNK cells. Primers of interferon-γ (IFN-γ), vascular endothelial growth factor (VEGF-C) and transforming growth factor β1 (TGF-β1) were synthesized respectively and were used to detect the expression of these three cytokines by qPCR method. The results showed that the expression of TET1 in uNK cells decreased significantly after 168 h of lentivirus infection (P<0.05), indicating that the expression of TET1 gene was significantly down regulated under RNA interference. When compared with the blank control groups, the uNK cells proliferation was not affected after TET1 interference (P>0.05) which shown by CCK8 detection results. Fluorescent qPCR results showed that after TET1 interference, the expression level of TGF-β1 was increased significantly (P<0.01), while IFN-γand VEGF-C were both decreased significantly (P<0.05). These findings revealed that interference with down-regulation of TET1 gene expression did not affect the proliferation of uNK cells, but had an effect on the transcriptional level of cytokines, thereby playing an important role in the innate immunity of animals in the uterus.

Key words: TET1, uNK cell, cellular proliferation, cytokine, mouse

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