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Updated: Jul 2, 2025
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Isolation, Culture, and Differentiation of Bone Marrow Stromal Cells and Osteoclast Progenitors from Mice
Published on: January 6, 2018
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Comparative transcriptome analysis of bone marrow resident versus culture-expanded mouse mesenchymal stem/stromal
Christopher L Haga1, Cori N Booker1, Jacqueline Strivelli1
1Department of Molecular Medicine, The Herbert Wertheim UF Scripps Institute of Biomedical Innovation and Technology, Jupiter, Florida, USA.
Cytotherapy
|February 19, 2024
Summary
Culture expansion significantly alters mesenchymal stem/stromal cell (MSC) gene expression, impacting key attributes. This study compares bone marrow resident MSCs with culture-expanded MSCs to reveal these critical differences.
Area of Science:
- Stem Cell Biology
- Molecular Biology
- Regenerative Medicine
Background:
- Mesenchymal stem/stromal cells (MSCs) are typically defined by culture expansion.
- While expanded MSCs share properties with bone marrow (BM)-resident stem/progenitor cells, direct comparisons of their critical quality attributes are limited.
- Understanding how culture adaptation impacts MSC properties is crucial for their therapeutic applications.
Purpose of the Study:
- To directly compare gene expression profiles of BM-resident MSCs and culture-expanded MSCs.
- To identify specific biological pathways and processes affected by culture adaptation and expansion.
- To elucidate how culture expansion influences the unique quality attributes of MSCs.
Main Methods:
- RNA sequencing was performed on Lin-SCA1+ MSCs enriched by immunodepletion (ID) and after culture expansion (Ex), as well as Lin-LEPR+ MSCs sorted directly from BM (S).
- Differential gene expression analysis (DEGs) and gene set enrichment analysis were employed to identify unique pathways.
- K-means clustering and principal component analysis were used to resolve transcriptional changes related to isolation and culture status.
Main Results:
- Hierarchical clustering separated MSC populations based on their isolation and expansion status.
- Key drivers of variance included transcripts related to vasculature development, ossification, and inflammatory/cytokine signaling.
- Significant DEGs were identified between BM-resident and culture-expanded MSCs, mapping to immune, metabolic, tissue development, and cell growth processes.
Conclusions:
- Comparative analyses reveal substantial differences in gene expression signatures between BM-resident and culture-expanded MSCs.
- Culture adaptation and expansion significantly alter MSC transcriptomes, endowing them with unique quality attributes.
- These findings provide critical insights into MSC biology and quality control for therapeutic use.
