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Isolation and Enrichment of Human Adipose-derived Stromal Cells for Enhanced Osteogenesis
Published on: January 12, 2015
Single-cell transcriptomic sequencing analyses of cell heterogeneity during osteogenesis of human adipose-derived
Rongmei Qu1, Kai He2, Tingyu Fan1
1Guangdong Provincial Key Laboratory of Medical Biomechanics & Guangdong Engineering Research Center for Translation of Medical 3D Printing Application & National Demonstration Center for Experimental Education of Basic Medical Sciences & National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, People's Republic of China.
Abstract:
Mesenchymal stem cells (MSCs) are known for their multilineage differentiation potential with immune-modulatory properties. The molecular underpinnings of differentiation remain largely undefined. In this study, we investigated the cellular and molecular features of chemically induced osteogenesis from MSC isolated from human adipose tissue (human adipose MSCs, hAMSCs) using single-cell RNA-sequencing (scRNA-seq). We found that a near complete differentiation of osteogenic clusters from hAMSCs under a directional induction. Both groups of cells are heterogeneous, and some of the hAMSCs cells are intrinsically prepared for osteogenesis, while variant OS clusters seems in cooperation with a due division of the general function. We identified a set of genes related to cell stress response highly expressed during the differentiation. We also characterized a series of transitional transcriptional waves throughout the process from hAMSCs to osteoblast and specified the unique gene networks and epigenetic status as key markers of osteogenesis.
Insights
Researchers explored the molecular details of how human adipose mesenchymal stem cells (hAMSCs) become bone cells. They identified key genes and gene networks involved in this osteogenesis process, revealing insights into cell stress and differentiation.
Area of Science:
- Stem cell biology
- Molecular biology
- Biochemistry
Background:
- Mesenchymal stem cells (MSCs) possess multilineage differentiation and immunomodulatory capabilities.
- The molecular mechanisms driving MSC differentiation are not fully understood.
- Osteogenesis, the process of bone formation, is a key differentiation pathway for MSCs.
Purpose of the Study:
- To investigate the cellular and molecular characteristics of chemically induced osteogenesis in human adipose-derived MSCs (hAMSCs).
- To identify key genes, transcriptional waves, and epigenetic factors involved in hAMSC osteogenesis using single-cell RNA-sequencing (scRNA-seq).
Main Methods:
- Isolation and culture of hAMSCs from human adipose tissue.
- Chemically induced osteogenic differentiation of hAMSCs.
- Single-cell RNA-sequencing (scRNA-seq) for transcriptomic profiling.
- Bioinformatic analysis to identify gene expression patterns and networks.
Main Results:
- Observed near-complete differentiation into osteogenic clusters under directed induction.
- Identified heterogeneity within hAMSCs, with some cells pre-primed for osteogenesis.
- Discovered cell stress response genes highly expressed during differentiation.
- Characterized transitional transcriptional waves from hAMSCs to osteoblasts.
- Specified unique gene networks and epigenetic states marking osteogenesis.
Conclusions:
- Osteogenesis from hAMSCs involves complex transcriptional dynamics and cell cooperation.
- Cell stress response pathways play a significant role in the osteogenic differentiation process.
- Identification of key gene networks and epigenetic markers provides novel insights into osteogenesis regulation.
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