中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (17): 2644-2651.doi: 10.3969/j.issn.2095-4344.2017.17.004

• 胚胎干细胞 embryonic stem cells • 上一篇    下一篇

干细胞拉曼光谱收集条件选择及间充质干细胞与胚胎干细胞拉曼光谱的比较

陈  明,程雪莲,段永娟,胡  晓   

  1. 中国医学科学院北京协和医学院血液学研究所血液病医院,实验血液学国家重点实验室,天津市  300020
  • 修回日期:2017-05-05 出版日期:2017-06-18 发布日期:2017-06-29
  • 通讯作者: 胡晓,博士,研究员,中国医学科学院北京协和医学院血液学研究所血液病医院,实验血液学国家重点实验室,天津市 300020
  • 作者简介:陈明,男,1992年生,内蒙古乌兰察布市人,蒙古族,硕士,主要从事干细胞生物学研究。
  • 基金资助:

    国家863高技术研究发展计划(2011AA020118);国家973重点基础项目(2012CB966504)

Optimization of Raman spectra acquisition conditions and its application in a comparison study on mesenchymal stem cells and embryonic stem cells

Chen Ming, Cheng Xue-lian, Duan Yong-juan, Hu Xiao   

  1. State Key Laboratory of Experimental Hematology, Institute of Hematology & Hospital of Blood Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
  • Revised:2017-05-05 Online:2017-06-18 Published:2017-06-29
  • Contact: Hu Xiao, M.D., Researcher, State Key Laboratory of Experimental Hematology, Institute of Hematology & Hospital of Blood Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
  • About author:Chen Ming, Master, State Key Laboratory of Experimental Hematology, Institute of Hematology & Hospital of Blood Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
  • Supported by:

    the National High-Technology Research and Development Program of China (863 Program), No. 2011AA020118; the National Basic Research Program of China (973 Program), No. 2012CB966504

摘要:

文章快速阅读:

文题释义:
拉曼光谱:
一种快速、非介入、非标记的光学检测方法。利用激光照射获得生物样品的拉曼峰图,通过对拉曼光谱峰数据分析,可获得细胞以及细胞器内蛋白质、核酸或者脂类等含量和结构信息。比较细胞的拉曼光谱可以区别不同的细胞类型及提供不同细胞的化学组成与功能上的差异信息。
光栅:是一种由大量等宽等间距的平行狭缝构成的光学仪器,光栅的制作方法一般是在玻璃上刻出大量的平行刻痕,刻痕部分不透光。光栅刻度密度即每毫米的刻痕数量,单位为gr/mm。当单色光经过光栅时会发生光的衍射并产生干涉现象,通过分析衍射花纹可以推测出拉曼散射光的光强。

 

摘要
背景:
拉曼光谱在检测细胞状态方面相比于传统技术具有快速、非介入、非标记等特点,因此在生物医学领域中的应用正日益受到关注,但是该技术应用于干细胞检测的条件还有待进一步优化。
目的:探索激光波长与光栅刻度密度对于干细胞拉曼光谱分辨率与收集时间等参数的影响,明确可以用于干细胞分析的拉曼光谱收集条件。
方法:首先比较532,638,785 nm 3个波长激光及600,1 200,1 800 gr/mm 3种光栅刻度密度条件对人间充质干细胞与人胚胎干细胞拉曼光谱的影响;之后比较这2个条件不同组合得到的拉曼光谱的光谱分辨率与收集时间,选择出最佳的组合条件;最后使用选出的最佳条件结合主成分分析方法比较胚胎干细胞与间充质干细胞拉曼光谱的差异以验证优化条件的适用性。
结果与结论:①激光波长与光栅刻度密度均会不同程度影响干细胞拉曼光谱的峰强,进而影响特征性拉曼峰之间的比值;②785 nm波长激光与1 200 gr/mm光栅刻度密度条件组合是最适合收集条件;③对比分析胚胎干细胞与间充质干细胞的拉曼光谱图,提示胚胎干细胞具有更高的核酸含量,而间充质干细胞在一些蛋白和脂类含量上更为丰富。

 

 

ORCID: 0000-0003-0855-8626(陈明)

关键词: 干细胞, 胚胎干细胞, 拉曼光谱, 激光, 光栅, 间充质干细胞, 胚胎干细胞, 峰位, 主成分分析

Abstract:

BACKGROUND: Raman spectrum, compared with conventional detection technologies, is a rapid, non-invasive and label-free optical method. Its application has become an issue of concern in biomedical research. However, further studies are warranted to optimize the acquisition condition of Raman spectra from different stem cells.
OBJECTIVE: To explore the effect of the wavelength of laser and the groove frequency of gratings to obtain the optimized parameter combination for Raman spectrum collection in human stem cells.
METHODS: Using human mesenchymal stem cells as samples, the effects of different laser wavelengths (532, 638, 785 nm) and different grating groove frequency (600, 1 200, 1 800 gr/mm) on Raman spectra were compared respectively. Then the different combinations of the wavelength and groove frequency were used and compared in terms of the spectra resolution and acquisition time, and the best acquisition condition was selected and applied in a comparison study on the Raman spectra from human mesenchymal stem cells and human embryonic stem cells.
RESULTS AND CONCLUSION: The wavelengths of lasers and groove frequencies of gratings showed compound impacts on both the spikes at different wavenumbers and the ratio between spikes; the combination of 785 nm and 1 200 gr/mm was confirmed to be the best spectrum features for human mesenchymal stem cells. The comparison of Raman spectra from human mesenchymal stem cells and human embryonic stem cells implies that the embryonic stem cells contain higher nucleic acids than the mesenchymal stem cells, while the mesenchymal stem cells appear to contain more proteins and lipids.

 

 

Key words: Mesenchymal Stem Cells, Embryonic Stem Cells, Spectrum Analysis, Raman, Tissue Engineering

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