A New Targeted Transgenic Mouse Line for the Study of Protocadherin γC4.

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Gamma-protocadherins (γ-Pcdhs) are crucial for neural development, with distinct isoforms potentially having unique functions.
• The γC4 isoform is the only γ-Pcdh essential for postnatal survival in mice.
• Mutations in γ-Pcdh genes are linked to human neurodevelopmental disorders.

Purpose of the Study:

• To create a new mouse line for studying the γC4 isoform of gamma-protocadherins.
• To investigate the essential functions of the γC4 isoform in vivo.
• To provide a tool for understanding neurodevelopmental disorders associated with γ-Pcdh gene mutations.

Main Methods:

• Generation of a C4-GFP reporter mouse line by expressing Pcdhgc4 with a C-terminal GFP tag from the Rosa26 locus.
• Utilizing Cre-lox recombination to control transgene expression.
• Employing Nestin-Cre to achieve restricted expression in the nervous system.

Main Results:

• The C4-GFP mouse line allows for the expression of the γC4 isoform.
• Restricted expression of the Pcdhgc4 transgene in the nervous system rescued neonatal lethality in Pcdhgc4 mutant mice.
• The study demonstrates the sufficiency of γC4 expression for postnatal survival.

Conclusions:

• The developed C4-GFP mouse line is a valuable tool for studying the essential γC4 isoform.
• This model will facilitate research into the mechanisms underlying γC4 function.
• Understanding γC4's role is critical for neurodevelopmental disorder research.