首页> 外文会议>Biophotonics and Immune Responses; Progress in Biomedical Optics and Imaging; vol.7 no.10 >Molecular Imaging of Low-Power Laser Irradiation Induced Cell Proliferation
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Molecular Imaging of Low-Power Laser Irradiation Induced Cell Proliferation

机译:低功率激光辐照诱导细胞增殖的分子成像

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Low-power laser irradiation (LPLI) has been shown to promote cell proliferation in various cell types, yet the mechanism of which has not been fully clarified. Studying the signaling pathways involved in the laser irradiation is important for understanding these processes. The Ras/Raf/MEK/ERK (extracellular-signal-regulated kinase) signaling pathway is a network that governs proliferation, differentiation and cell survival. Recent studies suggest that Ras/Raf signaling pathway is involved in the LPLI-induced cell proliferation. Protein kinase Cs (PKCs) have been recently presumed to be involved in the regulation of cell proliferation induced by LPLI. In present study, to monitor the direct interaction between Ras and Raf and PKCs activation after LPLI treatment in living cells in real time, Raichu-Ras reporter and C kinase activity reporter (CKAR) were utilized, both of which were constructed based on fluorescence resonance energy transfer (FRET) technique. Our results show that the direct interaction between Ras and Raf is monitored during cell proliferation induced by LPLI (0.8 J/cm~2) in serum-starved human lung adenocarcinoma cells (ASTC-a-1) expressing Raichu-Ras reporter using FRET imaging on laser scanning confocal microscope, and that the increasing dynamics of PKCs activity is also monitored during cell proliferation induced by LPLI (0.8 J/cm2) in serum-starved ASTC-a-1 cells expressing CKAR reporter using the similar way. Taken together, LPLI induces the ASTC-a-1 cell proliferation by activated Ras directly interacting with Raf and by specifically activating PKCs.
机译:低功率激光照射(LPLI)已显示出可促进各种细胞类型中的细胞增殖,但其机理尚未完全阐明。研究涉及激光辐照的信号通路对于理解这些过程很重要。 Ras / Raf / MEK / ERK(细胞外信号调节激酶)信号传导途径是控制增殖,分化和细胞存活的网络。最近的研究表明,Ras / Raf信号通路参与LPLI诱导的细胞增殖。最近已经推测蛋白激酶Cs(PKCs)参与了LPLI诱导的细胞增殖的调控。在本研究中,为了实时监测LPLI处理活细胞后Ras和Raf与PKCs活化之间的直接相互作用,利用Raichu-Ras报告基因和C激酶活性报告基因(CKAR),两者都是基于荧光共振构建的能量转移(FRET)技术。我们的结果表明,在FLI成像中,在表达饥饿的人肺腺癌细胞(ASTC-a-1)的血清饥饿的人肺腺癌细胞(ASTC-a-1)中,LPLI(0.8 J / cm〜2)诱导的细胞增殖过程中监测了Ras与Raf之间的直接相互作用。在激光扫描共聚焦显微镜上观察到,PKLs活性的增加动态也在通过LPLI(0.8 J / cm2)在表达CKAR报告基因的血清饥饿的ASTC-a-1细胞中诱导的细胞增殖过程中进行了监测。总之,LPLI通过与Raf直接相互作用的活化Ras和特异性活化PKCs诱导ASTC-a-1细胞增殖。

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