Stem-Like Cancer Cells in a Dynamic 3D Culture System: A Model to Study Metastatic Cell Adhesion and Anti-Cancer...

Area of Science:

• Oncology
• Cell Biology
• Biotechnology

Background:

• Metastasis is driven by cancer stem cells (CSCs) with stemness features.
• CSCs arise from epithelial to mesenchymal transition (EMT), gaining drug resistance.
• Current in vitro models inadequately represent the dynamic in vivo metastatic process.

Purpose of the Study:

• To develop and validate a 3D dynamic cell culture system simulating CSC adhesion to target tissues.
• To investigate the mechanisms of CSC adhesion to fibroblasts in vitro.
• To screen potential anti-metastatic agents using this novel model.

Main Methods:

• Isolation of 3D tumor spheroids with CSC-like features from MCF-7 and A549 cell lines.
• Co-culture of spheroid-derived cells with human fibroblasts on a scaffold in a perfused millifluidic system.
• Assessment of cell adhesion using scanning electron microscopy (SEM) and evaluation of RGD integrin antagonists.

Main Results:

• Spheroid-derived cells demonstrated tight adhesion to fibroblasts under continuous perfusion.
• Scanning electron microscopy confirmed the adhesion of tumor cells to the fibroblast scaffold.
• Cilengitide, an RGD integrin antagonist, effectively inhibited CSC adhesion to fibroblasts.

Conclusions:

• The 3D dynamic culture system successfully models CSC adhesion to target tissues.
• This model provides a promising platform for studying metastatic infiltration in vitro.
• The study identifies cilengitide as a potential inhibitor of CSC adhesion and a candidate for anti-metastatic drug screening.