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Systematic Reconstruction of Molecular Cascades Regulating GP Development Using Single-Cell RNA-Seq.
Junxiang Li1, Haofei Luo2, Rui Wang1
1MOE Key Laboratory of Bioinformatics, Center for Synthetic and System Biology, Tsinghua University, Beijing, China; School of Life Sciences, Tsinghua University, Beijing 100084, China.
Cell Reports
|May 11, 2016
Summary
This study reconstructs growth plate development using single-cell RNA sequencing and a novel bioinformatics pipeline, Sinova. It identifies new genes and pathways crucial for bone growth and regeneration.
Area of Science:
- Developmental Biology
- Genomics
- Bioinformatics
Background:
- The growth plate (GP) is essential for bone elongation and regeneration.
- Systematic understanding of GP development regulators is limited despite identified key factors.
- Genetic perturbation studies have revealed some regulators, but a comprehensive view is lacking.
Purpose of the Study:
- To systematically reconstruct physiological growth plate development with high temporal and spatial resolution.
- To discover novel genes, signaling pathways, and surface markers involved in GP development.
- To identify key transcriptional factors regulating GP maturation.
Main Methods:
- Single-cell RNA sequencing (RNA-seq) of 217 cells from growth plates.
- Development of a de novo bioinformatics pipeline named Sinova for developmental reconstruction.
- Validation of identified transcriptional factors using an in vitro EGFP-Col10a screening system.
Main Results:
- Sinova successfully reconstructed GP development, confirming prior knowledge and enabling new discoveries.
- Identified novel genes, potential signal pathways, and surface markers (CD9/CD200) for precise developmental depiction.
- Discovered effective combinations of transcriptional factors regulating GP maturation, validated experimentally.
Conclusions:
- Single-cell profiling and the Sinova pipeline systematically reconstructed molecular cascades in GP development.
- The developed bioinformatics pipeline is applicable to studying other developmental processes.
- This work provides a high-resolution molecular map of growth plate development.
