Landscape perspectives of tumor, EMT, and development

Area of Science:

• Oncology
• Cell Biology
• Systems Biology

Background:

• Tumor fatality is often linked to metastasis.
• Epithelial mesenchymal transition (EMT) is implicated in cancer metastasis and increased stemness.
• Cancer stem cells (CSCs) possess stem cell characteristics and contribute to tumor development and heterogeneity.

Purpose of the Study:

• To review and quantify the relationship between EMT, CSCs, and tumor development.
• To explore the origins of cellular heterogeneity in cancer.
• To understand the dynamic nature of tumor cells for improved therapeutic strategies.

Main Methods:

• Review of recent research on EMT and CSCs.
• Modeling gene regulatory networks to identify distinct cellular states.
• Quantification of landscape topography to analyze tumor development and metastasis.
• Analysis of epigenetic modifications (DNA methylation, histone modification) as drivers of heterogeneity.

Main Results:

• Tightly regulated gene networks can lead to distinct states including Normal, Premalignant, Cancer, CSC, and stem cell (SC).
• Weakly regulated gene networks can result in multiple meta-stable states, suggesting an epigenetic and physical origin of heterogeneity.
• Phenotypic and functional heterogeneity in cancer and CSCs arises from self-renewal, differentiation, and epigenetic diversification.

Conclusions:

• Elucidating the dynamics of EMT and CSCs is crucial for understanding tumor progression.
• The proposed model offers an epigenetic and physical basis for cancer cell heterogeneity.
• Understanding these cellular dynamics can enhance insights into therapeutic response, resistance, and relapse.