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Single Cell Transcriptomics-Informed Induced Pluripotent Stem Cells Differentiation to Tenogenic Lineage
Angela Papalamprou1,2,3, Victoria Yu1,2,3, Wensen Jiang1,2,3
1Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA.
Biorxiv : the Preprint Server for Biology
|April 24, 2023
Summary
Researchers optimized human induced pluripotent stem cell (hiPSC) differentiation to the syndetome stage for tendon development. Inhibiting Wnt signaling reduced neural off-target cells and improved syndetome induction efficiency for cell-based therapies.
Area of Science:
- Developmental Biology
- Stem Cell Biology
- Regenerative Medicine
Background:
- Axial tendons in vertebrates develop from paraxial mesoderm, progressing through specific stages to the syndetome.
- Signaling pathways governing early tendon differentiation are known, but syndetome specification nuances remain unclear.
Purpose of the Study:
- To explore pathway regulation in syndetome specification from the sclerotome stage.
- To optimize *in vitro* differentiation of human induced pluripotent stem cells (hiPSCs) to the syndetome stage.
Main Methods:
- Stepwise differentiation of hiPSCs using chemically defined media and small molecules.
- Single-cell RNA sequencing and pathway analysis to guide media modification.
- Transcriptomic analysis following WNT inhibitor addition.
Main Results:
- Identified off-target neural differentiation with Wnt overexpression.
- WNT inhibition post-somite stage eliminated neural cells.
- WNT inhibition increased syndetome induction efficiency.
Conclusions:
- Fine-tuning *in vitro* tendon differentiation is crucial for cell-based tendon therapies.
- WNT signaling inhibition is a key factor in optimizing syndetome specification.
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