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| 1 | 不同浓度PM_(2.5)对小鼠肺泡Ⅱ型上皮细胞MLE-12的损伤作用及SP-B表达影响显示文摘目的探讨不同浓度细颗粒物(PM_(2.5))对小鼠肺泡Ⅱ型上皮细胞MLE-12的损伤作用及肺表面活性蛋白-B(SP-B)表达的影响。方法将肺泡Ⅱ型上皮细胞MLE-12分为实验组和对照组。实验组采用加入12.5、25、50、100、200μg/mL PM_(2.5)混悬液的DMEM完全培养基培养,对照组采用DMEM完全培养基培养。培养24 h或48 h后,采用光学显微镜观察细胞形态,透射电镜观察细胞超微结构,RTCA仪观察细胞增殖能力;Western blotting法检测细胞中SP-B蛋白;qRT-PCR法检测细胞中SP-B mRNA。结果随着PM_(2.5)浓度的升高,实验组细胞形态和超微结构受损程度逐渐加重,可见板层小体受损等细胞器损伤现象,对照组细胞形态和超微结构正常;与对照组相比,PM_(2.5)呈浓度依赖性抑制实验组细胞的增殖。与对照组相比,实验组细胞SP-B蛋白和mRNA表达呈浓度依赖性下调(P均<0.05)。结论PM_(2.5)可呈剂量依赖性损伤小鼠肺泡Ⅱ型上皮细胞MLE-12,并下调SP-B表达。 | 李本 彭倩 高永峰 肖瑶 陈纪涛 刘季芳 | 2023 | 山东医药2023，63，27： | 0 |
| 2 | Stay in touch with the endoplasmic reticulum显示文摘The endoplasmic reticulum(ER),which is composed of a continuous network of tubules and sheets,forms the most widely distributed membrane system in eukaryotic cells.As a result,it engages a variety of organelles by establishing membrane contact sites(MCSs).These contacts regulate organelle positioning and remodeling,including fusion and fission,facilitate precise lipid exchange,and couple vital signaling events.Here,we systematically review recent advances and converging themes on ER-involved organellar contact.The molecular basis,cellular influence,and potential physiological functions for ER/nuclear envelope contacts with mitochondria,Golgi,endosomes,lysosomes,lipid droplets,autophagosomes,and plasma membrane are summarized. | Sha Sun Gan Zhao Mingkang Jia Qing Jiang Shulin Li Haibin Wang Wenjing Li Yunyun Wang Xin Bian Yan G.Zhao Xun Huang Ge Yang Huaqing Cai Jose C.Pastor-Pareja Liang Ge Chuanmao Zhang Junjie Hu | 2024 | Science China(Life Sciences)2024，67，2： | 0 |
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