Human cerebral organoids model tumor infiltration and migration supported by astrocytes in an autologous setting

Area of Science:

• Neuroscience
• Oncology
• Biotechnology

Background:

• Developing effective treatments for malignant brain tumors is challenging due to the lack of suitable models for studying therapeutic effects on the human brain.
• Existing models do not fully replicate the complex microenvironment of the brain, hindering research into tumor progression and treatment responses.

Purpose of the Study:

• To establish a novel cerebral organoid model for studying brain tumorigenesis and evaluating potential cancer therapies.
• To investigate the tumor-like properties and behavior of cells overexpressing the c-MYC oncogene within an organoid system.
• To explore the influence of the brain microenvironment, specifically glial cells, on tumor cell migration and invasion.

Main Methods:

• Established a cerebral organoid model by overexpressing the c-MYC oncogene in human cells to mimic brain tumors.
• Utilized two culture approaches: assembloids (normal organoid with tumor sphere) and co-cultures of organoid slices with tumor cells.
• Analyzed tumor-like cell properties including proliferation, invasion, and expression of markers like Ki-67, VIM, and CD133.

Main Results:

• The GFP+/c-MYC high cells exhibited tumor-like characteristics, including high proliferation and invasion, and an immature phenotype.
• Cerebral organoids and their slices effectively supported the infiltration of these tumor-like cells.
• Demonstrated that glial cells within the organoid environment significantly shape the migratory and infiltrative potential of tumor cells.

Conclusions:

• The developed cerebral organoid model provides a robust platform for long-term study of brain tumors and their interactions with the brain microenvironment.
• This model facilitates research into the mechanisms of tumor cell invasion and offers new avenues for developing targeted therapies for malignant brain tumors.
• The findings highlight the crucial role of glial cells in modulating brain tumor cell behavior, offering insights for future therapeutic strategies.