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Humanized mouse model: Hematopoietic stemcell transplantation and tracking using short tandem repeat technology.
Lia Walcher1, Nadja Hilger1, Anja K Wege2
1Department of Immunology, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany.
Immunity, Inflammation and Disease
|June 12, 2020
Summary
Cord blood stem cells are more effective for creating humanized mice than adult blood stem cells. This study compared both sources, finding cord blood cells engraft better in mice for preclinical research.
Area of Science:
- Immunology
- Preclinical Research
- Stem Cell Biology
Background:
- Humanized mice are crucial preclinical models for studying human immunity.
- Challenges include sourcing human hematopoietic stem cells (HSC) and achieving adequate engraftment.
Purpose of the Study:
- To compare the efficacy of cord blood (CB)-derived HSC versus adult mobilized peripheral blood HSC for humanized mouse models.
- To develop a short tandem repeat (STR) based method for donor identification in humanized mice.
Main Methods:
- Compared in vitro characteristics (purity, viability, differentiation) of CB-HSC and adult HSC.
- Assessed in vivo engraftment of CB-HSC and adult HSC in NSG mice.
- Developed and applied an STR-based assay for donor cell identification.
Main Results:
- In vitro, CB-HSC and adult HSC showed similar purity, viability, and differentiation potential.
- In vivo, CB-HSC demonstrated significantly higher engraftment rates in NSG mice compared to adult HSC.
- The STR-based test successfully identified and distinguished cells from different donors in various humanized mouse models.
Conclusions:
- Cord blood-derived HSC are more suitable for generating humanized immune systems in mice than adult mobilized HSC.
- Adult HSC engraftment is not improved by increased cell dose or fresh cell use.
- STR analysis is a reliable method for donor identification in humanized mice.
