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A method for isolating contractile smooth muscle cells from cryopreserved tissue.

Matheus L C Schultz1,2, Pranjal Seth1,2, Linda Kachmar2

  • 1Department of Biomedical Engineering, McGill University, Montreal, Quebec, Canada.

American Journal of Physiology. Cell Physiology
|February 5, 2024
PubMed
Summary

This study presents a new protocol for isolating contractile smooth muscle cells (SMCs) from cryopreserved tissue, overcoming the limitations of fresh tissue requirements. The developed method yields viable SMCs that better represent fresh tissue compared to cultured cells.

Keywords:
cell contractilitycell shorteningsingle-cell studiessmooth muscle cells

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Area of Science:

  • Cell Biology
  • Physiology

Background:

  • Isolating contractile smooth muscle cells (SMCs) is crucial for research but often relies on fresh tissue, presenting logistical challenges.
  • Existing methods for SMC isolation have variable success rates.

Purpose of the Study:

  • To develop and validate a novel protocol for isolating contractile SMCs from cryopreserved smooth muscle (SM) tissue.
  • To enhance experimental efficiency by reducing reliance on fresh tissue.
  • To compare the phenotype of SMCs isolated from cryopreserved tissue with those from fresh and cultured sources.

Main Methods:

  • Development of a protocol for dissociating SMCs from cryopreserved SM tissue.
  • Inclusion of a brief tissue incubation step in culture medium prior to cell dissociation.
  • Analysis of contractile protein expression in isolated SMCs.

Main Results:

  • The protocol successfully yields abundant, viable, spindle-shaped, contractile SMCs from cryopreserved tissue.
  • Isolated SMCs from cryopreserved tissue more accurately represent fresh SM tissue compared to cultured SMCs.
  • A brief pre-incubation step is critical for obtaining contractile SMCs.

Conclusions:

  • A novel protocol enables the isolation of contractile SMCs from cryopreserved SM tissue, offering a more accessible and efficient alternative to fresh tissue.
  • SMCs isolated using this method better preserve their contractile phenotype compared to cultured SMCs.
  • The protocol provides a valuable resource for researchers studying smooth muscle biology across different species.