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第42卷第2期      李 雅,葛     文,张志伟,等. IL⁃17诱导的p300调控NSCLC细胞迁移、侵袭和MMP2表达的作用[J].
                  2022年2月                     南京医科大学学报(自然科学版),2022,42(02):160-165                       ·165 ·


                A                           4  p300    *      B                             D  4  p300  **  *
                                                                                 shp300+IL⁃17
                        pcDNA3.1 pcDNA3.1/p300 B  3  MMP2  *          shCTR  shCTR+IL⁃17       3  MMP2        ▲

                  p300           —300 kDa  蛋白相对表达量  2 1         p300                —300 kDa   蛋白相对表达量  2 1  ▲  ▲
                 MMP2            —74 kDa                       MMP2                 —74 kDa
                                            0                                                  0
                                                                                                      shp300+IL⁃17
                                                pcDNA3.1/p300
                 β⁃actin         —42 kDa                       β⁃actin              —42 kDa     shCTR
                                           pcDNA3.1                                              shCTR+IL⁃17
                                                               *
                   A:将H1299细胞转染pcDNA3.1/p300 48 h(与pcDNA3.1组比较,P < 0.01,n=3);B:转染shp300 质粒48 h时再用IL⁃17(50 ng/mL)刺激3 h
               (与shCTR组比较,P < 0.05,P < 0.01;与shCTR+IL⁃17组比较,P < 0.05, P < 0.01,n=3)。
                            *
                                   **
                                                                  ▲▲
                                                           ▲
                                       图7 Western blot检测过表达或敲低p300对MMP2表达的影响
                           Figure 7 Effects of p300 overexpression and knockdown on MMP2 expression by Western blot
                子,能作为辅激活因子与转录因子结合,参与靶基                                 KOWNACKA M,et al. Elevated regulatory T cells,sur⁃
                因表达的调控      [10⁃11] 。另 MMP2(也称明胶水解酶)是                  face and intracellular CTLA⁃4 expression and interleukin⁃
                MMP家族的重要成员,它不仅可水解Ⅳ型胶原蛋白                                17 in the lung cancer microenvironment in humans[J].
                                                       [10⁃11]         Cancer Immunol Immunother,2017,66(2):161-170
                和其他生物活性分子,而且还能激活 MMP9                      ,故
                                                                 [5] CHANG Y H,YU C W,LAI L C,et al. Up⁃regulation of
                它是肿瘤侵袭与转移重要的调节因子。
                                                                       interleukin⁃17 expression by human papillomavirus type
                    为了进一步探讨 p300 表达对 NSCLC 细胞迁移
                                                                       16 E6 in nonsmall cell lung cancer[J]. Cancer,2010,116
                与侵袭及 MMP2 表达的影响,本研究在 H1299 细胞
                                                                      (20):4800-4809
                内进行了 p300 过表达和敲低的相关实验。结果表                        [6] ZHAO C,LI Y,ZHANG W,et al. IL-17 induces NSCLC
                明,过表达p300后既可促进NSCLC细胞的迁移和侵                             A549 cell proliferation via the upregulation of HMGA1,
                袭,也能上调 MMP2 的表达,而敲低 p300 后由 IL⁃17                      resulting in an increased cyclin D1 expression[J]. Int J
                诱导的迁移和侵袭能力及 MMP2 的表达均显著降                               Oncol,2018,52(5):1579-1592
                低。鉴于IL⁃17诱导NSCLC细胞p300和MMP2的表                    [7] ZHANG J,LI Y,SHAN K,et al. Sublytic C5b⁃9 induces
                达高峰时间明显早于细胞的迁移和侵袭。因此推                                  IL ⁃ 6 and TGF ⁃ β1 production by glomerular mesangial
                测,p300 的表达上调或许是通过增加 MMP2 的生                            cells in rat Thy ⁃ 1 nephritis through p300 ⁃ mediated C/
                成,最终促进了细胞的迁移和侵袭。不过,这一推                                 EBPβ acetylation[J]. Faseb J,2014,28(3):1511-1525
                                                                 [8] WEINBERG F,DICKSON R P,NAGRATH D,et al. The
                测还有待后续的实验加以证实。
                                                                       lung microbiome:a central mediator of host inflammation
               [参考文献]                                                  and metabolism in lung cancer patients?[J]. Cancers(Ba⁃

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                    Oncol. 2021,17(2):183-196                                               [收稿日期] 2021-11-23
               [4] KWIECIEN I,STELMASZCZYK⁃EMMEL A,POLUBIEC⁃                                    (本文编辑:唐      震)
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