首页> 外文会议>Conference on effects of low-power light on biological systems >Low Power Laser Effects at the Single Cell Level. A Confocal Microscopy Study
【24h】

Low Power Laser Effects at the Single Cell Level. A Confocal Microscopy Study

机译:单细胞水平的低功率激光效果。共聚焦显微镜研究

获取原文

摘要

Confocal microscopy was used for irradiation and observation of the same area of interest, allowing the imaging of low power laser effects in subcellular components and functions, at the single cell leve. Coverslips cultures of human fetal foreskin fibroblasts (HFFF2) were placed in a small incubation chamber for in vivo microscopic observation. Cells were stimulated by the 647 nm line of the Argon-Krypton laser of the confocal microscope (0.1 mW/cm~2). Membrane permeability, mitochondrial membrane potential (triangle openPSI_m), intracellular pH_i, calcium alterations and nuclear chromation accessibility were monitored, at different times after irradiation, using specific fluorescent vital probes. Images were stored to the computer and quantitative evaluation was performed using image-processing software. After irradiation, influx and efflux of the appropriate dyes monitored changes in cell membrane permeability. Laser irradiation caused alkalization of the cytosolic pH_i and increase of the mitochondrial membrane potential (triangle openPSI_m). Temporary global Ca~(2+) responses were also observed. No such effects were noted in microscopic fields other than the irradiated ones. No toxic effects were observed, during time course of the experiment.
机译:共聚焦显微镜用于照射和观察相同的感兴趣区域,从而可以在单个细胞水平上对亚细胞成分和功能中的低功率激光效应进行成像。将人胎儿包皮成纤维细胞(HFFF2)的盖玻片培养物置于小培养箱中,以进行体内显微镜观察。共聚焦显微镜的氩-激光的647 nm线(0.1 mW / cm〜2)刺激细胞。使用特定的荧光生命探针,在照射后的不同时间监测膜通透性,线粒体膜电位(三角形openPSI_m),细胞内pH_i,钙改变和核染色质可及性。将图像存储到计算机中,并使用图像处理软件进行定量评估。照射后,适当染料的流入和流出监测细胞膜通透性的变化。激光辐照引起细胞质pH_i碱化和线粒体膜电位的增加(三角形openPSI_m)。还观察到暂时的整体Ca〜(2+)反应。除了被照射的以外,在微观领域中没有观察到这样的影响。在实验过程中未观察到毒性作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号