Generation of decellularized human brain tissue for investigating cell-matrix interactions: a proof-of-concept study

Area of Science:

• Neuroscience
• Biomaterials Science
• Regenerative Medicine

Background:

• The brain extracellular matrix (ECM) is crucial for myelin repair and neural regeneration.
• Understanding ECM's role requires models of decellularized human brain tissue (DHBT) from regions with varying regenerative potential.

Purpose of the Study:

• To establish and characterize DHBT from distinct human brain regions (SVZ, FC, WM).
• To investigate the impact of region-specific ECM on neural stem cell (NSC) and monocyte behavior.
• To explore DHBT as a model for studying cell-matrix interactions in neuroregeneration.

Main Methods:

• Developed an effective decellularization protocol for human brain tissue (SVZ, FC, WM).
• Utilized comparative proteomics to define region-specific matrisomes.
• Assessed NSC and monocyte survival and differentiation within DHBT using cell culture and imaging mass cytometry.

Main Results:

• Proteomic analysis confirmed retention of key matrisome proteins in DHBT.
• Identified unique matrisome proteins in SVZ (LGI3, C1QB), FC (Annexins, S100A, TGM2), and WM (S100B).
• NSCs differentiated into astrocytes in FC/WM, and astrocytes/oligodendrocytes in SVZ DHBT. Monocytes exhibited anti-inflammatory phenotypes on SVZ/WM DHBT.

Conclusions:

• The developed DHBT model effectively preserves region-specific ECM composition.
• DHBT facilitates investigation of how ECM influences NSC differentiation and immune cell phenotypes.
• This model is valuable for studying ECM properties and cell-matrix interactions in neuroregenerative contexts.