对TOF-SIMS成像的评估,用于半定量地图 BODIPY标记的纤维生素表面梯度的半定量地图
Chao Liu1, Tae Kyong John Kim2, Douglas H Wu1,3
1Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA. ssenyo@case.edu.
The Analyst
|January 19, 2026
概括
飞行时间二次离子质谱法 (ToF-SIMS) 在微流体细胞迁移研究中增强了纤维素蛋白梯度检测. 这种敏感的方法超越了光显微镜,使我们能够更好地了解生理机制和实验可重现性.
科学领域:
- 生物技术是生物技术.
- 细胞生物学 细胞生物学
- 分析化学 分析化学
背景情况:
- 微流体平台可以对细胞迁移进行受控研究,包括细胞吸收.
- 传统的成像方法难以检测出生物相关的蛋白质梯度,因为连接体密度低.
- 增强的灵敏度对于精确的可视化和分析微流体测试中的蛋白质梯度至关重要.
研究的目的:
- 为了证明使用飞行时间二次离子质谱法 (ToF-SIMS) 来表征纤维菌素梯度的可行性.
- 为了提高微流体芯片中合成表面上形成的纤维内素梯度的分析灵敏度.
- 提高对生理机制的阐明,并确保细胞迁移研究中的实验可重现性.
主要方法:
- 用于活细胞显微镜的塑料幻灯片上使用了带有外的微流体芯片.
- 用纤维素结合替代标签 (铜,,含的BODIPY) 进行ToF-SIMS分析的涂层幻灯片.
- 基于光的检测与ToF-SIMS进行了比较,用于纤维素染色体梯度的表征.
主要成果:
- ToF-SIMS在低至1μg mL-1的度中检测到纤维素素渐变,超过了光检测极限 (≥10μg mL-1).
- 在经过测试的标签中,BODIPY-纤维素 (BODIPY-FN) 提供了最低的背景信号.
- 图像质谱检测证实了纤维素的分布在 haptotaxis 区域内,ToF-SIMS 超过了标准显微镜的灵敏度.
结论:
- ToF-SIMS是一种高度灵敏且有效的方法,用于检测微流体平台中的代用标记联体梯度.
- 这种方法为细胞迁移研究中的定量连接体测量提供了可靠的方法.
- 这些发现增强了研究生理机制的能力,并提高了实验可重现性.
相关概念视频
09:48In Situ Characterization of Hydrated Proteins in Water by SALVI and ToF-SIMS
8.8K
This work presents a protocol for liquid handling and sample introduction to a microchannel for in situ time-of-flight secondary ion mass spectrometry analysis of protein biomolecules in an aqueous...
8.8K
06:24Preparation of Nanoparticles for ToF-SIMS and XPS Analysis
8.9K
A number of different procedures for preparing nanoparticles for surface analysis are presented (drop casting, spin coating, deposition from powders, and cryofixation). We discuss the challenges, opportunities, and possible applications of each method, particularly regarding the changes in the surface properties caused by the different preparation...
8.9K
09:56In Situ Characterization of Shewanella oneidensis MR1 Biofilms by SALVI and ToF-SIMS
9.6K
This article presents a method for growing a biofilm for in situ time-of-flight secondary ion mass spectrometry for chemical mapping in its hydrated state, enabled by a microfluidic reactor, System for Analysis at the liquid Vacuum Interface. The Shewanella oneidensis MR-1 with green fluorescence protein was used as a...
9.6K
10:22In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
18.7K
Soft landing of mass-selected ions onto surfaces is a powerful approach for the highly-controlled preparation of novel materials. Coupled with analysis by in situ secondary ion mass spectrometry (SIMS) and infrared reflection absorption spectroscopy (IRRAS), soft landing provides unprecedented insights into the interactions of well-defined species with...
18.7K
Quantitative Susceptibility Mapping of a Human Brain Using Ex-Vivo Magnetic Resonance Imaging
189
Quantitative susceptibility mapping, or QSM, quantifies the magnetic susceptibility of brain tissue, which reflects its cellular composition, like myelin content.Begin by acquiring ex-vivo magnetic resonance imaging or MRI data of a fixed human brain hemisphere.Use 3D gradient magnetic fields to magnetize the tissue and collect signals at multiple time points or echoes to reduce background noise and artifacts and enhance the signals.Generate phase maps for all echoes, ensuring the removal of...
189
Quantitative Strain Mapping of an Abdominal Aortic Aneurysm
5.0K
Source: Hannah L. Cebull1, Arvin H. Soepriatna1, John J. Boyle2 and Craig J. Goergen1
1Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
2Mechanical Engineering & Materials Science, Washington University in St. Louis, St Louis, Missouri
The mechanical behavior of soft tissues, such as blood vessels, skin, tendons, and other organs, are strongly influenced by their composition of elastin and collagen, which provide elasticity and strength. The fiber...
1Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
2Mechanical Engineering & Materials Science, Washington University in St. Louis, St Louis, Missouri
The mechanical behavior of soft tissues, such as blood vessels, skin, tendons, and other organs, are strongly influenced by their composition of elastin and collagen, which provide elasticity and strength. The fiber...
5.0K


