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Updated: Jul 31, 2025

Quantitative PCR-based Assay to Measure Sonic Hedgehog Signaling in Cellular Model of Ciliogenesis
Published on: January 31, 2025
Hedgehog signaling is a potential therapeutic target for vascular calcification
Aoran Huang1, Lu Li1, Xiaoxu Liu1
1Department of Nephrology, The First Hospital of China Medical University, Shenyang 110000, China.
Insights
Vascular calcification in chronic kidney disease is linked to Hedgehog signaling. Activating this pathway alleviated calcification, suggesting it as a potential therapeutic target.
Area of Science:
- Cardiovascular Biology
- Molecular Biology
- Nephrology
Background:
- Vascular calcification (VC) is a major cause of mortality in chronic kidney disease (CKD) patients.
- Hedgehog (Hh) signaling is implicated in bone mineralization and cardiovascular diseases, but its role in VC is unclear.
Purpose of the Study:
- To investigate the molecular mechanisms of VC in human primary vascular smooth muscle cells (VSMCs).
- To explore the potential of targeting the Hh signaling pathway for VC treatment.
Main Methods:
- Constructed a human VSMC calcification model and performed RNA sequencing.
- Analyzed differentially expressed genes (DEGs), conducted enrichment and protein-protein interaction (PPI) network analyses.
- Validated key genes and used Connectivity Map (CMAP) analysis to identify potential drugs, including Hh signaling modulators SAG and cyclopamine (CPN).
Main Results:
- Identified 166 DEGs enriched in ossification, osteoblast differentiation, and Hh signaling pathways.
- Discovered 10 key genes and identified potential therapeutic drugs.
- In vitro, SAG treatment alleviated VSMC calcification, while CPN exacerbated it.
Conclusions:
- VC pathogenesis is associated with Hh signaling.
- Targeting the Hh signaling pathway offers a promising therapeutic strategy for VC.
Background:
Patients with chronic kidney disease (CKD) suffered from vascular calcification (VC), one major contributor for their increased mortality rate. Hedgehog (Hh) signaling plays a crucial role in physiological bone mineralization and is associated with several cardiovascular diseases. However, the molecular changes underlying VC is ill defined and it remains unclear whether Hh signaling intervention affects VC.
Methods:
We constructed human primary vascular smooth muscle cell (VSMC) calcification model and performed RNA sequencing. Alizarin red staining and calcium content assay were conducted to identify the occurrence of VC. Three different R packages were applied to determine differentially expressed genes (DEGs). Enrichment analysis and protein-protein interaction (PPI) network analysis were carried out to explore the biological roles of DEGs. qRT-PCR assay was then applied to validate the expression of key genes. By using Connectivity Map (CMAP) analysis, several small molecular drugs targeting these key genes were obtained, including SAG (Hedgehog signaling activator) and cyclopamine (CPN) (Hedgehog signaling inhibitor), which were subsequently used to treat VSMC.
Results:
Obvious Alizarin red staining and increased calcium content identified the occurrence of VC. By integrating results from three R packages, we totally obtained 166 DEGs (86 up-regulated and 80 down-regulated), which were significantly enriched in ossification, osteoblast differentiation, and Hh signaling. PPI network analysis identified 10 key genes and CMAP analysis predicted several small molecular drugs targeting these key genes including chlorphenamine, isoeugenol, CPN and phenazopyridine. Notably, our in vitro experiment showed that SAG markedly alleviated VSMC calcification, whereas CPN significantly exacerbated VC.
Conclusions:
Our research provided deeper insight to the pathogenesis of VC and indicated that targeting Hh signaling pathway may represent a potential and effective therapy for VC.
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