Understanding Glioblastoma Dynamics Using 3D Organoids and Engineered Extracellular Matrix

Area of Science:

• Neuroscience
• Biomedical Engineering
• Cancer Biology

Background:

• Glioblastoma multiforme (GBM) is a deadly brain cancer driven by glioma stem-like cells (GSCs).
• Existing in vitro models lack the complex tumor microenvironment, limiting research relevance.
• The perivascular niche is crucial for GSC function and GBM progression.

Purpose of the Study:

• To develop a physiologically relevant in vitro model of GBM.
• To better recapitulate the GBM perivascular niche and its influence on GSCs.
• To create a platform for studying GBM pathophysiology and therapeutic resistance.

Main Methods:

• Developed patient-derived GSC Matrigel spheroids that form organoids.
• Integrated organoids into engineered microenvironments with synthetic extracellular matrix (eECM).
• Co-cultured organoids with endothelial cells (EC) to mimic vasculature.

Main Results:

• GSC spheroids differentiated over two weeks, with enhanced marker expression near ECs.
• Organoid encapsulation in eECM and EC co-culture increased GBM-associated gene expression.
• The model demonstrated progressive GSC differentiation and GBM gene induction.

Conclusions:

• The developed platform offers a modular in vitro system for GBM research.
• This model enhances the study of GBM pathophysiology by mimicking the perivascular niche.
• It provides a more predictive system for understanding GBM recurrence and therapeutic resistance.