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A New Targeted Transgenic Mouse Line for the Study of Protocadherin γC4
Journal article   Peer reviewed

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

Cathy M McLeod, Camille M Hanes, Leah C Fuller, Samjhana Bhandari, Hannah G Lanthier, Robert W Burgess, Joshua A Weiner and Andrew M Garrett
Genesis (New York, N.Y. : 2000), Vol.63(1), e70010
02/2025
DOI: 10.1002/dvg.70010
PMCID: PMC11810047
PMID: 39923243
url
https://pmc.ncbi.nlm.nih.gov/articles/PMC11810047/View
Open Access

Abstract

The γ-protocadherins (γ-Pcdhs) comprise 22 homophilic cell adhesion molecule isoforms, expressed from the Pcdhg gene cluster via promoter choice mechanisms that serve many crucial functions during neural development. Emerging evidence supports the hypothesis that distinct isoforms have unique functions. The γC4 isoform, which is expressed from the Pcdhgc4 promoter and includes its unique variable exon, is the sole γ-Pcdh isoform essential for the postnatal survival in mice. Here we describe a new mouse line (C4-GFP) in which Pcdhgc4 with a C-terminal GFP tag is expressed from the Rosa26 locus following excision of a lox-Stop-lox cassette by Cre recombinase. We report that restricted expression of this transgene in the nervous system using Nestin-Cre is sufficient to rescue the neonatal lethality of mice mutant for Pcdhgc4. This new line will be a vital tool for dissecting mechanisms underlying the functions of this essential cell adhesion molecule gene, mutations in which have been associated with neurodevelopmental disorders in humans.
Animals Cadherin Related Proteins Cadherins - genetics Cadherins - metabolism Green Fluorescent Proteins - genetics Green Fluorescent Proteins - metabolism Integrases - genetics Integrases - metabolism Mice Mice, Transgenic Promoter Regions, Genetic Protein Isoforms - genetics Protein Isoforms - metabolism RNA, Untranslated

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