Phosphoproteomic Analysis and Organotypic Cultures for the Study of Signaling Pathways

Area of Science:

• Cell Biology
• Molecular Biology
• Biochemistry

Background:

• Signaling pathways regulate fundamental cellular processes, including development, homeostasis, and disease.
• Most signaling pathway research relies on animal models or simplified cell cultures, limiting human-specific insights.
• The Transforming Growth Factor-beta (TGF-β) signaling pathway is critical in various cellular functions.

Purpose of the Study:

• To investigate the TGF-β signaling pathway within a human tissue context.
• To establish a robust methodology combining genetic engineering and advanced proteomics for studying signaling in human tissues.
• To provide a human-relevant model for understanding tissue homeostasis and transformation.

Main Methods:

• Utilized CRISPR-Cas9 gene editing in human keratinocytes (N/TERT-1).
• Developed a 3D organotypic skin model using genetically engineered human cells.
• Applied quantitative proteomics and phosphoproteomics mass spectrometry for in-depth molecular analysis.

Main Results:

• Successfully dissected the TGF-β signaling pathway in a human 3D skin model.
• Generated comprehensive proteomic and phosphoproteomic data from engineered human cells.
• Demonstrated the efficacy of the combined approach for studying signaling pathways in a human context.

Conclusions:

• The integration of 3D organotypic models, genetic engineering, and quantitative proteomics provides powerful human-specific insights into signaling pathways.
• This methodology is adaptable for studying other gene targets and various 3D cell and tissue models.
• The findings advance our understanding of TGF-β signaling in human tissue, relevant to homeostasis and pathological conditions.