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Comprehensive analysis based on spatial domains identifies CD44 as a potential target of puerarin
Song-Yang Xi1,2,3, Hui Zhang1, Qi-Juan Wang2,3
1The First Clinical Medical College of Nanjing University of Chinese Medicine, Nanjing, 210029, Jiangsu, China.
Background:
Melanoma, a highly metastatic and treatment-resistant malignancy, urgently requires novel therapeutic strategies. Puerarin, a natural isoflavone with established anti-tumorigenic effects in diverse cancers, remains underexplored in melanoma despite its potential to modulate melanogenesis and oxidative stress. This study investigates puerarin's spatial targeting mechanisms in melanoma to elucidate its therapeutic specificity.
Methods:
A multi-omics approach integrating single-cell RNA sequencing (scRNA-seq), spatial transcriptomics, and structure-based docking plus normal-mode analysis was employed. Spatial domain analysis identified puerarin-responsive malignant cell clusters, while molecular docking and protein-ligand simulations prioritized CD44 as a candidate receptor. Functional validation included extracellular matrix (ECM) signaling pathway analysis, spatial colocalization studies, and in vitro experiments.
Results:
Spatial analysis showed enrichment of puerarin-related signals in malignant-cell-dominated domains. ECM ligands (collagens, fibronectin, laminins) that signal through CD44/SDC1 were concentrated in these domains, where CD44 was overexpressed relative to surrounding compartments. Molecular modeling suggested CD44, a cell-surface receptor overexpressed in melanoma cells, as a putative mediator of puerarin's effects on these pathways. In vitro experiments further supported CD44's role in modulating puerarin-responsive domains.
Conclusion:
These observations are hypothesis-generating and provide a potential direction for future research on whether CD44 mediates puerarin's spatial effects in melanoma.
Insights
Puerarin shows potential for melanoma treatment by targeting CD44 receptors. This study reveals how puerarin may specifically affect melanoma cells through spatial targeting mechanisms, offering new therapeutic avenues.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Melanoma is a difficult-to-treat cancer requiring new therapies.
- Puerarin, a natural compound, has anti-tumor properties but is understudied in melanoma.
- Investigating puerarin's spatial targeting in melanoma is crucial for understanding its specificity.
Purpose of the Study:
- To explore the spatial targeting mechanisms of puerarin in melanoma.
- To identify potential receptors and pathways involved in puerarin's anti-melanoma effects.
- To elucidate the therapeutic specificity of puerarin.
Main Methods:
- Utilized a multi-omics approach including single-cell RNA sequencing and spatial transcriptomics.
- Employed structure-based docking and normal-mode analysis to identify potential receptors.
- Conducted functional validation through extracellular matrix (ECM) signaling pathway analysis and in vitro experiments.
Main Results:
- Puerarin-related signals were enriched in melanoma cell domains.
- CD44 receptor was overexpressed in these domains and identified as a potential mediator.
- ECM ligands signaling through CD44 were concentrated in puerarin-responsive areas.
Conclusions:
- CD44 is a putative mediator of puerarin's spatial effects in melanoma.
- Findings suggest CD44-mediated targeting as a potential therapeutic strategy.
- Further research is warranted to confirm CD44's role in puerarin's spatial effects on melanoma.
