Analysis of trunk neural crest cell migration using a modified Zigmond chamber assay

Area of Science:

• Developmental Biology
• Cell Migration Studies
• Neuroscience

Background:

• Neural crest cells (NCCs) are crucial for vertebrate development, migrating from the neural tube to form diverse cell types.
• Understanding NCC migration guidance is vital, with known repellent cues but few identified chemoattractants.
• Existing in vitro methods for studying NCC chemotaxis are challenging due to their non-homogenous distribution and rapid differentiation.

Purpose of the Study:

• To develop a novel in vitro approach for evaluating trunk NCC chemotaxis and migratory responses.
• To overcome limitations of current methods that require homogenous cell distribution and can alter in vivo conditions.

Main Methods:

• Utilized time-lapse imaging of primary, unperturbed trunk NCCs within a modified Zigmond chamber.
• Applied a chemotactant gradient perpendicular to the natural migratory directionality of NCCs at the culture periphery.
• Analyzed alterations in migratory polarity induced by the chemotactant gradient.

Main Results:

• The new technique successfully evaluates NCC chemotaxis and migratory responses without requiring homogenous cell distribution.
• This method is cost-effective, requires minimal cell explants, and avoids harsh cell treatments like trypsinization.
• The approach maintains NCC distribution closer to in vivo conditions and reduces experimental time, minimizing differentiation.

Conclusions:

• The modified Zigmond chamber assay provides an efficient, inexpensive, and biologically relevant method for studying trunk NCC migration.
• This technique facilitates the identification of NCC chemoattractants and the elucidation of migratory guidance mechanisms.
• The findings offer a valuable tool for advancing research in developmental biology and neuroscience.