目的观察人类急性单核细胞白血病(AML-M5)细胞系THP-1与骨髓间充质干细胞(BM-MSCs)之间隧道纳米管(TNTs)结构的形成;探讨TNTs中线粒体转运对THP-1细胞凋亡的影响及线粒体在TNTs中转运的分子机制。方法使用特异性荧光染料分别对线粒体、...目的观察人类急性单核细胞白血病(AML-M5)细胞系THP-1与骨髓间充质干细胞(BM-MSCs)之间隧道纳米管(TNTs)结构的形成;探讨TNTs中线粒体转运对THP-1细胞凋亡的影响及线粒体在TNTs中转运的分子机制。方法使用特异性荧光染料分别对线粒体、细胞骨架蛋白F-Actin和细胞核进行荧光标记,共聚焦显微镜观察BM-MSCs与THP-1细胞间TNTs的形成及TNTs中线粒体的传递。BM-MSCs与THP-1细胞共培养5 d后运用流式细胞术检测THP-1细胞凋亡;共培养体系分为4组:直接共培养(SC组)、Transwell透膜共培养(TC组)、直接共培养体系中加入细胞松弛素(TNTs抑制剂)Latrunculin B(LC组)、无BM-MSCs而仅有培养液(MC组);Western blot检测细胞器转运相关马达蛋白(KIF5B)表达水平。结果 BM-MSCs与THP-1细胞间可观察到TNTs形成,BM-MSCs中线粒体通过TNTs单向传递到THP-1细胞,并未观察到线粒体逆向传递。Annexin V-FITC/PI检测THP-1细胞凋亡结果显示,SC组跟LC组凋亡率较MC组明显减低( P <0.01),LC组高于SC组( P <0.01),TC组较SC组和LC组明显升高( P <0.01),TC组与MC组凋亡率无明显差异( P >0.05)。BM-MSCs中 KIF5B表达水平明显高于THP-1细胞( P <0.001),Rotenone处理BM-MSCs后显著抑制KIF5B的表达( P <0.01)。结论 BM-MSCs线粒体通过TNTs向THP-1细胞单向传递,THP-1细胞摄取BM-MSCs线粒体后可能诱导凋亡抵抗;细胞间线粒体转运可能与马达蛋白KIF5B相关。展开更多
Screening active natural products, rapid identification, and accurate isolation are of great important for modern natural lead compounds discovery1. We hereby reported the isolation of seven new neotecleanin-type limo...Screening active natural products, rapid identification, and accurate isolation are of great important for modern natural lead compounds discovery1. We hereby reported the isolation of seven new neotecleanin-type limonoids(1–7), seven new limonoids with 5-oxatricyclo[5.4.0.11,4]hendecane ring system(8–14), and two new precursors(15–16) together with four known limonoids(17–20) from the root barks of Walsura robusta. Their structures, including their absolute configurations, were elucidated based on analyses of HR-ESI-MS, 1D/2D NMR, ECD spectrum calculations and singlecrystal X-ray diffraction techniques. Compounds 2, 8, 9, 11, 13, 14, 18 showed significant anti-inflammatory activities in LPS-induced RAW 264.7 cell line, BV2 microglial cells, and Propionibacterium acnes-stimulated THP-1 human monocytic cells. Walrobsin M(11) exhibited anti-inflammatory activity with IC50 value of 7.9670.36 μmol/L, and down-regulated phosphorylation levels of ERK and p38 in a dose-dependent manner.展开更多
文摘目的观察人类急性单核细胞白血病(AML-M5)细胞系THP-1与骨髓间充质干细胞(BM-MSCs)之间隧道纳米管(TNTs)结构的形成;探讨TNTs中线粒体转运对THP-1细胞凋亡的影响及线粒体在TNTs中转运的分子机制。方法使用特异性荧光染料分别对线粒体、细胞骨架蛋白F-Actin和细胞核进行荧光标记,共聚焦显微镜观察BM-MSCs与THP-1细胞间TNTs的形成及TNTs中线粒体的传递。BM-MSCs与THP-1细胞共培养5 d后运用流式细胞术检测THP-1细胞凋亡;共培养体系分为4组:直接共培养(SC组)、Transwell透膜共培养(TC组)、直接共培养体系中加入细胞松弛素(TNTs抑制剂)Latrunculin B(LC组)、无BM-MSCs而仅有培养液(MC组);Western blot检测细胞器转运相关马达蛋白(KIF5B)表达水平。结果 BM-MSCs与THP-1细胞间可观察到TNTs形成,BM-MSCs中线粒体通过TNTs单向传递到THP-1细胞,并未观察到线粒体逆向传递。Annexin V-FITC/PI检测THP-1细胞凋亡结果显示,SC组跟LC组凋亡率较MC组明显减低( P <0.01),LC组高于SC组( P <0.01),TC组较SC组和LC组明显升高( P <0.01),TC组与MC组凋亡率无明显差异( P >0.05)。BM-MSCs中 KIF5B表达水平明显高于THP-1细胞( P <0.001),Rotenone处理BM-MSCs后显著抑制KIF5B的表达( P <0.01)。结论 BM-MSCs线粒体通过TNTs向THP-1细胞单向传递,THP-1细胞摄取BM-MSCs线粒体后可能诱导凋亡抵抗;细胞间线粒体转运可能与马达蛋白KIF5B相关。
基金Financial support for this study by the National Natural Science Foundation of China (31470416, China)the Outstanding Youth Fund of the Basic Research Program of Jiangsu Province (BK20160077, China)+1 种基金the Program for Changjiang Scholars and Innovative Research Team in University (IRT_15R63, China)the "Double First-Class" University project (CPU2018GY08, China)
文摘Screening active natural products, rapid identification, and accurate isolation are of great important for modern natural lead compounds discovery1. We hereby reported the isolation of seven new neotecleanin-type limonoids(1–7), seven new limonoids with 5-oxatricyclo[5.4.0.11,4]hendecane ring system(8–14), and two new precursors(15–16) together with four known limonoids(17–20) from the root barks of Walsura robusta. Their structures, including their absolute configurations, were elucidated based on analyses of HR-ESI-MS, 1D/2D NMR, ECD spectrum calculations and singlecrystal X-ray diffraction techniques. Compounds 2, 8, 9, 11, 13, 14, 18 showed significant anti-inflammatory activities in LPS-induced RAW 264.7 cell line, BV2 microglial cells, and Propionibacterium acnes-stimulated THP-1 human monocytic cells. Walrobsin M(11) exhibited anti-inflammatory activity with IC50 value of 7.9670.36 μmol/L, and down-regulated phosphorylation levels of ERK and p38 in a dose-dependent manner.
