Development of Müller cell-based 3D biomimetic model using bioprinting technology

Area of Science:

• Ophthalmology
• Biomaterials Science
• Cell Biology

Background:

• Müller cells are vital for retinal structural stability and metabolic homeostasis.
• Traditional 2D cell cultures lack the 3D environment and cellular morphology necessary for accurate in vivo functional studies.
• A need exists for advanced models that replicate the in vivo-like functions of Müller cells.

Purpose of the Study:

• To develop and investigate a Müller cell-based 3D biomimetic model.
• To compare the functional characteristics of the 3D model with conventional 2D cell cultures.
• To assess the utility of the 3D model for studying Müller cell functions in a more physiologically relevant context.

Main Methods:

• Primary Müller cells were isolated and bioprinted to create a 3D-aligned architecture.
• The stereographic and functional properties of the 3D model were characterized.
• The 3D model's response to hyperglycemic conditions was compared to 2D cultures and in vivo diabetic models.

Main Results:

• The 3D biomimetic model successfully replicated characteristic Müller cell morphological features, including endfeet, soma, and microvilli.
• Under hyperglycemic conditions, the 3D Müller cell model exhibited responses similar to in vivo diabetic retinal changes.
• Conventional 2D cultures showed distinct cytokine and growth factor secretion patterns compared to the 3D model and in vivo data.

Conclusions:

• The developed 3D Müller cell biomimetic model offers a more accurate representation of in vivo retinal conditions.
• This model serves as an advanced tool for investigating Müller cell functions and retinal diseases.
• This study represents a foundational step toward creating comprehensive 3D models of the vertebrate retina.