Loss-of-Function Approach in the Embryonic Chick Retina by using Tol2 Transposon-Mediated Transgenic Expression of...

Area of Science:

• Developmental neurobiology
• Ophthalmology research
• Molecular biology techniques

Background:

• The chick retina is a valuable model for studying neural development due to its accessibility and rapid growth.
• A key limitation in chick retina research has been the absence of effective gene silencing methods for loss-of-function studies.
• Understanding gene function is crucial for unraveling the complexities of retinal development.

Purpose of the Study:

• To establish a robust loss-of-function approach for gene analysis in the developing chick retina.
• To develop a method for stable and efficient gene silencing using artificial microRNAs (miRNAs).
• To overcome the technical limitations hindering genetic manipulation in this model system.

Main Methods:

• Utilizing the Tol2 transposon system for transgenic expression of artificial miRNAs.
• Employing in ovo electroporation to introduce Tol2 transposon plasmids and transposase into embryonic chick retinas.
• Co-expressing EmGFP (emerald green fluorescent protein) as a marker for successful transfection and gene silencing.

Main Results:

• Demonstrated successful and stable integration of the expression cassette into the host genome via Tol2 transposase activity.
• Achieved significant suppression of target gene expression, exemplified by the Nel glycoprotein.
• Confirmed the efficiency of the method for inducing robust gene silencing in retinal cells.

Conclusions:

• The developed methodology provides an efficient and reliable loss-of-function tool for chick retina research.
• This technique enables stable gene silencing, facilitating detailed studies of gene function in retinal development.
• The protocol enhances the utility of the chick retina as a model system in neurobiology.