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Updated: May 28, 2026
09:51
A Microfluidic Platform for High-throughput Single-cell Isolation and Culture
Published on: June 16, 2016
An integrated optofluidic platform enabling label-free single-cell sorting and culture.
Baojian Zhang1,2,3, Fuyuan Chen2,4,3, Liru Zhao1,2
1School of Ophthalmology & Optometry, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, P.R. China. beili@ciomp.ac.cn.
The Analyst
|May 26, 2026
Summary
This study introduces an optical tweezers and microwell array (OTMA) platform for precise single-cell sorting. The novel system minimizes laser damage and fluidic stress, preserving cell viability for downstream applications.
Area of Science:
- Biotechnology
- Microfluidics
- Cell Biology
Background:
- Optical tweezers (OT) offer high-precision single-cell manipulation but face limitations due to hydrodynamic drag and laser power requirements that can harm cells.
- Existing methods struggle to balance trapping stability with cell viability, especially when dealing with fluidic forces.
Purpose of the Study:
- To develop an integrated optical tweezers and microwell array (MA-chip) platform (OTMA) that overcomes the limitations of traditional optical tweezers.
- To enable deterministic single-cell sorting and collection with minimal perturbation and high cell viability.
Main Methods:
- The OTMA platform utilizes a Z-axis "lift-and-drift" retrieval strategy, decoupling optical trapping from fluidic transport.
- Microwells act as hydrodynamic shelters, protecting cells from shear-induced stress during manipulation and collection.
- The system enables automated collection of sorted cells into standard 96-well plates.
Main Results:
- The OTMA platform demonstrates robust performance for cell targets ≥3 µm, including microorganisms and mammalian tumor cells.
- Deterministic single-cell sorting with near-complete recovery was achieved at a throughput of 20-30 cells/min, with <1s laser exposure per cell.
- The platform exhibits excellent biocompatibility, maintaining >90% viability in fragile mammalian cells and achieving 93.8% clonal expansion in yeast.
Conclusions:
- The OTMA platform offers a label-free solution for high-fidelity single-cell isolation, prioritizing cell quality over maximal throughput.
- This technology shows significant potential for applications requiring the preservation of sensitive cellular states, such as rare-cell cloning and single-cell omics.
