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Effects of Cryopreservation and Thawing on Single-Cell Transcriptomes of Human T Cells

  • Jeong Seok Lee (Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology(KAIST)) ;
  • Kijong Yi (Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology(KAIST)) ;
  • Young Seok Ju (Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology(KAIST)) ;
  • Eui-Cheol Shin (Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology(KAIST))
  • Received : 2020.06.13
  • Accepted : 2020.07.08
  • Published : 2020.08.31

Abstract

Cryopreservation and thawing of PBMCs are inevitable processes in expanding the scale of experiments in human immunology. Here, we carried out a fundamental study to investigate the detailed effects of PBMC cryopreservation and thawing on transcriptomes. We sorted Tregs from fresh and cryopreserved/thawed PBMCs from an identical donor and performed single-cell RNA-sequencing (scRNA-seq). We found that the cryopreservation and thawing process minimally affects the key molecular features of Tregs, including FOXP3. However, the cryopreserved and thawed sample had a specific cluster with up-regulation of genes for heat shock proteins. Caution may be warranted in interpreting the character of any cluster of cells with heat shock-related properties when cryopreserved and thawed samples are used for scRNA-seq.

Keywords

Acknowledgement

This work was funded by Samsung Science and Technology Foundation under Project Number SSTF-BA1402-51 (to Shin EC).

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