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第44卷第9期
               ·1202 ·                           南 京    医 科 大 学 学         报                        2024年9月


                 A                                              质粒为代表检查GFP表达情况,发现其转染效率可
                         0 h  1 h  2 h  3 h  6 h  12 h
                                                                达 80%左右(图 3A)。之后,分别提取前述 GMC 中
                    KLF5                            51 kDa
                                                                的蛋白质,用 WB 检查 KLF5 的过表达和沉默水平。
                    IL⁃23                           19 kDa
                                                                结果证实,与 pIRES2⁃EGFP 转染组相比,pIRES2⁃
                   β⁃actin                          42 kDa
                                                                KLF5转染细胞后能显著表达KLF5。shCTR+sublytic
                 B                                              C5b⁃9 组的 KLF5 表达量显著高于 shCTR 组,而与
                         4 3  KLF5       ** **  ** **           shCTR+sublytic C5b⁃9组相比,shKLF5+sublytic C5b⁃9
                             IL⁃23
                        Relative protein level  2 1  *          组的 KLF5 表达则未见显著升高(图 3B~D),提示,
                                                                sublytic C5b⁃9刺激GMC能显著升高KLF5蛋白的表
                                                                达,而用shKLF5则可沉默KLF5基因的表达。


                         0                                      2.4  过 表 达 或 敲 低 KLF5 对 sublytic C5b ⁃ 9 刺 激
                                                                GMC诱导的IL⁃23表达的影响
                            0 h  1 h  2 h  3 h  6 h  12 h
                                                                     将 pIRES2⁃EGFP 和 pIRES2⁃KLF5 质粒分别转
                 A:The protein levels of KLF5 and IL ⁃ 23 in rat GMC stimulated
              with sublytic C5b⁃9 for 0,1,2,3,6 and 12 h were examined by WB. B:  染 GMC 48 h,或将 shCTR 和 shKLF5 质粒分别转染
                                                         *
              Semi⁃quantitative analysis of WB. Compared with the 0 h group,P <  GMC后48 h再给予sublytic C5b⁃9刺激6 h。提取细
                    **
              0.05 and P < 0.01(n=3).                           胞的 mRNA 和蛋白,行 RT⁃qPCR 和 WB 实验。结果
              图2   Sublytic C5b⁃9刺激GMC不同时间KLF5和IL⁃23蛋
                                                                表明,转染 pIRES2⁃KLF5 过表达质粒的 GMC,IL⁃23
                   白的表达
              Figure 2  The expression levels of KLF5 and IL⁃23 protein  mRNA 和 KLF5 及 IL⁃23 的蛋白水平均明显升高,而
                      in rat GMC stimulated by sublytic C5b⁃9 at dif⁃  转染shKLF5质粒的GMC,其由sublytic C5b⁃9诱导的
                      ferent time                               IL⁃23 mRNA以及蛋白水平均显著低于shCTR+sublytic
                                                                C5b⁃9组(图4)。
              2.3  KLF5 过表达或小干扰质粒转染 GMC 后 KLF5                  2.5  Sublytic C5b⁃9 刺激和高低表达 KLF5 对 IL⁃23
              的表达                                               启动子活性的影响
                  将 KLF5 过表达质粒(pIRES2⁃KLF5)和对照质                      将 IL⁃23 全长启动子荧光素酶报告基因质粒
              粒(pIRES2⁃EGFP)转染大鼠 GMC 48 h,或将 KLF5              (pGL3⁃IL⁃23⁃FL)转染GMC 48 h,再用sublytic C5b⁃9
              小 干 扰 质 粒(shKLF5)及 对 照 质 粒(shCTR)转 染              刺激 GMC 6 h,或将 pGL3⁃IL⁃23⁃FL 质粒分别与
              GMC 48 h 时再行 sublytic C5b⁃9 刺激 6 h。以 shCTR        pIRES2⁃KLF5 或 shKLF5 质粒(包括各自的对照质

              A         GFP         B                       C                            D   4
                                                                           shKLF5+sublytic C5b⁃9
                                             pIRES2⁃EGFP               shCTR+sublytic C5b⁃9  protein level  3  **  ΔΔ
                                                  pIRES2⁃KLF5
                                      KLF5           51 kDa        shCTR                     2              ##

                                     β⁃actin         42 kDa  KLF5              51 kDa       Relative KLF5  1
                      White light                           β⁃actin            42 kDa        0
                                                                                             pIRES2⁃KLF5
                                                                                                    shCTR
                                                                                               shCTR+sublytic C5b⁃9
                                                                                          pIRES2⁃EGFP shKLF5+sublytic C5b⁃9




                 A:Rat GMCs were transfected with shCTR plasmid for 48 h,and GFP expression showed that the transfection efficiency was up to 80%(×100,
              scale bar=100 μm). B-C:GMCs were transfected with pIRES2⁃KLF5 plasmid for 48 h(B)or shKLF5 plasmid for 48 h followed by sublytic C5b⁃9 stim⁃
              ulation for 6 h(C),and the protein level of KLF5 was detected by WB. D:Semi⁃quantitative analysis of WB(figure 3 B and C). Compared with the
                                                                                               ##
                                                        ΔΔ
                            **
              pIRES2⁃EGFP group,P < 0.01;compared with the shCTR group, P < 0.01;compared with the shCTR+sublytic C5b⁃9 group,P < 0.01(n=3).
                             图3   GMC质粒转染效率以及KLF5过表达或小干扰质粒转染GMC后KLF5的表达
              Figure 3  The efficiency of plasmid transfection into GMC and the expression of KLF5 in the GMC transfected with
                       pIRES2⁃KLF5 or shKLF5 plasmids
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