首页> 外文会议>Nanoscale imaging, sensing, and actuation for biomedical applications XI >Photothermal optical coherence tomography for depth-resolved imaging of mesenchymal stem cells via single wall carbon nanotubes
【24h】

Photothermal optical coherence tomography for depth-resolved imaging of mesenchymal stem cells via single wall carbon nanotubes

机译:光热光学相干断层扫描技术通过单壁碳纳米管对间充质干细胞进行深度分辨成像

获取原文
获取原文并翻译 | 示例

摘要

The progress in stem cell research over the past decade holds promise and potential to address many unmet clinical therapeutic needs. Tracking stem cell with modern imaging modalities are critically needed for optimizing stem cell therapy, which offers insight into various underlying biological processes such as cell migration, engraftment, homing, differentiation, and functions etc. In this study we report the feasibility of photothermal optical coherence tomography (PT-OCT) to image human mesenchymal stem cells (hMSCs) labeled with single-walled carbon nanotubes (SWNTs) for in vitro cell tracking in three dimensional scaffolds. PT-OCT is a functional extension of conventional OCT with extended capability of localized detection of absorbing targets from scattering background to provide depth-resolved molecular contrast imaging. A 91 kHz line rate, spectral domain PT-OCT system at 1310nm was developed to detect the photothermal signal generated by 800nm excitation laser. In general, MSCs do not have obvious optical absorption properties and cannot be directly visualized using PT-OCT imaging. However, the optical absorption properties of hMSCs can me modified by labeling with SWNTs. Using this approach, MSC were labeled with SWNT and the cell distribution imaged in a 3D polymer scaffold using PT-OCT.
机译:在过去十年中,干细胞研究的进展充满希望和潜力,可以解决许多未满足的临床治疗需求。优化现代干细胞治疗至关重要,它需要以现代的成像方式跟踪干细胞,这可以深入了解各种潜在的生物学过程,例如细胞迁移,植入,归巢,分化和功能等。在这项研究中,我们报告了光热光学相干的可行性。断层扫描(PT-OCT)成像,以单壁碳纳米管(SWNT)标记的人间充质干细胞(hMSC)进行三维支架中的体外细胞追踪。 PT-OCT是常规OCT的功能扩展,具有从散射背景对吸收目标进行局部检测的扩展功能,以提供深度分辨的分子对比成像。开发了一种在1310nm处的91 kHz线速谱域PT-OCT系统,以检测800nm激发激光产生的光热信号。通常,MSC没有明显的光吸收特性,无法使用PT-OCT成像直接可视化。但是,可以通过用SWNT标记来修饰hMSC的光吸收特性。使用这种方法,用SWNT标记MSC,并使用PT-OCT在3D聚合物支架中对细胞分布进行成像。

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