Whole-Mount Visualization of Primary Cilia in the Developing Mouse Brain

Area of Science:

• Neuroscience
• Developmental Biology
• Cell Biology

Background:

• Primary cilia are crucial organelles for brain development, acting as signaling hubs on neural progenitors at the ventricular surface.
• Existing methods like cryostat sectioning disrupt ciliary morphology and offer limited views.

Purpose of the Study:

• To adapt and optimize a whole-mount technique for visualizing primary cilia in embryonic and neonatal mouse brains.
• To enable robust and intact visualization of ciliary morphology during critical developmental stages.

Main Methods:

• Adaptation of the established whole-mount technique for delicate embryonic (E12-P3) mouse brain samples.
• Detailed step-by-step protocol for whole-mounting and immunostaining embryonic and neonatal cortices.
• Specific procedures for dissecting and visualizing cilia on the lateral and medial ganglionic eminences.

Main Results:

• Successful adaptation of the whole-mount method for visualizing primary cilia in developing mouse brains.
• Preservation of intact ciliary morphology at the ventricular surface of neural progenitors.
• Demonstration of visualization in both the developing cortex and ganglionic eminences.

Conclusions:

• The optimized whole-mount protocol provides a powerful tool for studying primary cilia in neural progenitors during brain development.
• This technique overcomes previous limitations, allowing for detailed analysis of ciliary structure and function.
• Enables direct visualization of cilia in key brain regions during embryonic and neonatal development.