Well-Defined Nanostructured Biointerfaces: Strengthened Cellular Interaction for Circulating Tumor Cells Isolation

Area of Science:

• Biomaterials Science
• Cell Biology
• Nanotechnology

Background:

• Topographic features at the cell-material biointerface are crucial for cellular sensing and regulate cell adhesion.
• The native extracellular matrix (ECM) provides structural and biochemical cues that influence cell behavior.
• Efficient isolation of circulating tumor cells (CTCs) is challenging but vital for early cancer diagnosis.

Purpose of the Study:

• To fabricate a well-defined nanostructured biointerface mimicking native ECM structures.
• To enhance the capture efficiency, specificity, and purity of circulating tumor cells (CTCs).
• To enable responsive detachment of captured cancer cells for downstream analysis.

Main Methods:

• Fabrication of a nanostructured biointerface using mussel-inspired polymer coating.
• Conjugation of biospecific ligands onto the bioinert background.
• Optimization of surficial nano-features for enhanced bioligand density, filopodia formation, and focal adhesion expression.
• Evaluation of capture efficiency, sensitivity, specificity, and purity for CTCs.

Main Results:

• The nanostructured biointerface significantly strengthened cancer cell affinity by integrating topographic features and biochemical cues.
• Optimized nano-features enhanced bioligand density, filopodia formation, and focal adhesion expression.
• The biointerface demonstrated high capture efficiency, sensitivity, specificity, and purity for CTCs.
• Captured cancer cells could be responsively detached without damage.

Conclusions:

• The developed nanostructured biointerface effectively mimics native ECM structures and enhances cancer cell capture.
• This technology offers a promising solution for the efficient isolation of rare CTCs from blood samples.
• The ability to detach captured cells facilitates downstream analysis, supporting earlier cancer diagnosis.