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Related Experiment Video

Updated: Mar 13, 2026

Protein Complex Affinity Capture from Cryomilled Mammalian Cells
10:37

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Efficient Release of Affinity-Captured Cells Using a Coiled-Coil-Based Molecular Trigger.

Mengen Zhang1, Wei Shen1

  • 1Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, 55455, USA.

Macromolecular Bioscience
|October 15, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces a novel platform for gentle and efficient cell release after affinity-based separation. The system uses a molecular trigger to detach cells without enzymes or harsh conditions, preserving cell integrity.

Keywords:
affinity-capturecell releasecell separationcoiled-coilself-assembling

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Area of Science:

  • Biotechnology
  • Cell Biology
  • Materials Science

Background:

  • Affinity-based cell separation offers high specificity but struggles with gentle cell release due to strong cell-material interactions.
  • Existing methods for cell detachment often involve enzymes or shear stress, potentially harming sensitive cells.

Purpose of the Study:

  • To develop a novel platform for efficient and gentle release of affinity-captured cells.
  • To overcome the limitations of current cell detachment methods in label-free separation techniques.

Main Methods:

  • A capture substrate functionalized with cell-capture antibody and coiled-coil A was designed.
  • A cell-releasing molecular trigger, B-PEG (polyethylene glycol) conjugate of coiled-coil B, was synthesized.
  • Coiled-coil A/B heterodimerization was utilized to recruit B-PEG and induce cell release.

Main Results:

  • The B-PEG trigger facilitated efficient and gentle release of captured cells.
  • The release mechanism avoided enzymatic cleavage or excessive shear stress.
  • Released cells maintained their viability, phenotype, and function, with no attached external molecules or cleaved endogenous surface molecules.

Conclusions:

  • The developed platform enables label-free, enzyme-free, and shear-free cell release after affinity capture.
  • This method is critical for preserving the integrity and functionality of sensitive cells for downstream applications.
  • The platform represents a significant advancement in cell separation and recovery technologies.