TT4: Neuro Culture-Insert – Directed Neurite Outgrowth for Compartmentalized Neuronal Analysis
The Neuro Culture-Insert is a cell culture tool for neurobiological research that enables directed neurite outgrowth in a defined environment. Based on the ibidi Culture-Insert 2 Well, it features microstructured grooves that form narrow channels between two compartments when placed on a cell culture surface.
With the Neuro Culture-Insert, ibidi and its partner demonstrates expertise in surface structuring, cell compartmentalization, and assay design for neuroscience applications.
Why It Matters
Neuroscience research aims to understand how neurons generate and modulate signals, how they interact with surrounding cells such as immune cells, and how these processes contribute to brain development, function, and disease. A major challenge in conventional neuronal culture systems is that neurites grow in all directions and frequently overlap, which complicates microscopic imaging and the separate analysis of neuronal compartments.
The Neuro Culture-Insert addresses this challenge by guiding neurite outgrowth through defined microchannels. This allows researchers to spatially separate cell bodies from neurites and analyze these compartments independently.
The system makes it possible to investigate questions that depend on distinguishing between neuronal compartments or tracking transport processes along neurites, which become far easier to visualize when they follow organized pathways. Ultimately, this technology advances the field by enabling more precise studies of neural communication, supporting the discovery of mechanisms underlying chronic pain and other neurological conditions, and paving the way for more targeted therapeutic strategies.
The Neuro Culture-Insert helps researchers to:
- Separate neuronal cell bodies and neurites in a defined experimental setup
- Study compartment-specific gene expression and localized signaling processes
- Visualize and analyze transport processes along aligned neurites more easily
- Investigate neurite interactions with other cells
The Idea Behind the Technology: Directed Outgrowth Through Structured Microchannels
The Neuro Culture-Insert is based on the ibidi Culture-Insert 2 Well, a removable silicone 2 Well chamber with a central wall of 500 µm width. At the bottom of this wall, parallel grooves of 5 µm or 10 µm width and 8 µm height are engraved. When the insert is placed onto a culture surface such as an ibidi µ-Dish 35 mm, these grooves form small microchannels that connect the two compartments.
The channels are too small for whole cells to migrate through, which keeps the cell bodies confined to the seeded compartment. However, neuronal neurites can extend through the microchannels into the adjacent compartment. This creates a simple and accessible compartmentalization system for neurobiology, enabling the selective study of neurites apart from the soma.
Unlike many alternative systems in which the microchannels are integrated into closed microfluidic chips, the Neuro Culture-Insert can be removed after neurite outgrowth. This provides direct access to the cultured structures for downstream analyses, such as contact-based methods (e.g., Atomic Force Microscopy (AFM)) or overlay experiments with gels and interacting cell types.
(A) The Neuro Culture-Insert placed inside an ibidi µ-Dish 35 mm, low. (B) Schematic close-up of the structured insert bottom with parallel grooves of 5 µm or 10 µm width. When the insert is placed on the µ-Dish surface, these grooves form microchannels that interconnect the two well compartments. (C) Primary sensory mouse neurons cultured in one compartment, with neurites growing through the channels into the adjacent compartment. (D) Magnified view showing neurites leaving the groove region. (E) Neurites grown in the channels and, after lysis, stained with Tuj-1 IR (neuronal tubulin, red) and DAPI (blue), showing neurite structures without DAPI-stained cell bodies in the groove region and the neurite compartment on the right. Dashed lines indicate the beginning and end of the groove region. Images (C)–(E) courtesy of Michaela Kress’ Lab, Medical University of Innsbruck, Austria.
Status and Outlook
The Neuro Culture-Insert is currently at the prototype stage.
Synergies and Compatibility
The Neuro Culture-Insert builds directly on the established Culture-Insert 2 Well platform and extends ibidi’s Culture-Insert portfolio into neurobiological applications. It is compatible with standard cell culture formats such as an ibidi µ-Dish and provides easy access to neuronal compartments after cultivation.
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Key Facts
- Collaboration partner: Prof. Michaela Kress, Medical University of Innsbruck, Austria
- Project lead: Miriam Balles (mballes@ibidi.de)
- Stage: Prototype
- Focus Area: Neurobiology, Neurite Outgrowth, Compartmentalized Cell Culture, Microscopy