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A Systematic Study of Size Correlation and Young's Modulus Sensitivity for Cellular Mechanical Phenotyping by
Minhui Liang1, Jianwei Zhong1, Ye Ai1
1Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore, 487372, Singapore.
Advanced Healthcare Materials
|July 19, 2022
Summary
Contactless hydro-stretching deformability cytometry (lh-DC) and contact constriction deformability cytometry (cc-DC) offer distinct advantages for cellular mechanical phenotyping. lh-DC excels at differentiating cell sizes, while cc-DC is more sensitive to individual cell mechanical changes.
Area of Science:
- Biophysics
- Cellular mechanics
- Microfluidics
Background:
- Cellular mechanical properties serve as crucial biophysical markers for cell state and health.
- Conventional methods for assessing cellular mechanics are often low-throughput and require manual expertise.
- Microfluidic mechanical phenotyping offers a promising alternative to overcome these limitations.
Purpose of the Study:
- To comprehensively study and compare two microfluidic cellular mechanical phenotyping methods: contactless hydro-stretching deformability cytometry (lh-DC) and contact constriction deformability cytometry (cc-DC).
- To quantitatively analyze the size correlation and Young's modulus sensitivity of both lh-DC and cc-DC.
- To provide guidance on selecting the optimal microfluidic platform for specific cell analysis applications.
Main Methods:
- Utilized polymerized hydrogel beads of defined sizes to characterize deformability.
- Employed contactless hydro-stretching deformability cytometry (lh-DC) and contact constriction deformability cytometry (cc-DC).
- Assessed the deformability of a human breast cell line mixture to evaluate differentiation capabilities.
Main Results:
- cc-DC demonstrated a strong negative correlation between bead size and deformability (r = -0.95), while lh-DC showed a weak positive correlation (r = 0.13).
- Young's modulus sensitivity was size-dependent in cc-DC but constant in lh-DC.
- lh-DC showed superior differentiation of cells with varying size distributions, whereas cc-DC offered higher sensitivity for detecting mechanical changes within a single cell line.
Conclusions:
- This study provides the first quantitative comparison of size correlation and Young's modulus sensitivity between contactless and contact microfluidic mechanical phenotyping methods.
- The findings highlight that lh-DC is better suited for analyzing cell populations with diverse sizes, while cc-DC is more effective for detecting subtle mechanical variations within a homogeneous cell population.
- The comparative analysis offers valuable insights for researchers to choose the most appropriate microfluidic platform for their specific cellular mechanical analysis needs.
