Dual-Mode Wheat Germ Agglutinin Labeling - A Versatile Cell Segmentation Strategy for High-Resolution LA-ICP-TOFMS...

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Cell Biology

Background:

• Single-cell analysis requires precise segmentation of cellular structures.
• Current membrane labeling protocols for LA-ICP-TOFMS often need tissue-specific optimization.
• Accurate cell segmentation is crucial for high-resolution elemental mapping and phenotyping.

Purpose of the Study:

• To develop a broadly applicable and robust cell membrane labeling protocol for LA-ICP-TOFMS.
• To enhance the accuracy and efficiency of single-cell segmentation in high-resolution elemental imaging.
• To provide a scalable and cost-effective alternative to existing membrane labeling methods.

Main Methods:

• Developed a dual-labeling strategy using fluorescently labeled wheat germ agglutinin (WGA) and a metal-tagged anti-WGA antibody.
• Applied the WGA-based protocol for cell membrane and nucleus labeling.
• Integrated fluorescence microscopy and LA-ICP-TOFMS for cross-validation and high-resolution elemental mapping.

Main Results:

• Achieved robust, high-contrast membrane labeling with WGA, compatible with both fluorescence microscopy and LA-ICP-TOFMS.
• Demonstrated enhanced cell segmentation accuracy at high resolutions, facilitating downstream single-cell data analysis.
• The protocol proved broadly applicable, reducing staining costs and streamlining workflows.

Conclusions:

• The WGA-based dual-labeling strategy offers a versatile and efficient solution for cell membrane labeling in LA-ICP-TOFMS.
• This method significantly improves the precision of single-cell segmentation and the quality of elemental distribution analysis.
• The protocol presents a scalable and cost-effective advancement for high-resolution single-cell analysis.