Explore the groundbreaking creation of a Dcx-CreERT2 knock-in mouse, a pivotal tool for unraveling the mysteries of newborn neuron development and brain plasticity.
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Generation of a Dcx-CreERT2 knock-in mouse for genetic manipulation of newborn neurons.
Perez et al., Genesis 2023
DOI: 10.1002/dvg.23584
The new development in the field of genetic manipulation of adult-born neurons in mice is the creation of a novel CreERT2 driver line that targets the endogenous mouse doublecortin (Dcx) locus. This locus is a marker for fate-specified neuroblasts and immature neurons. The significance of this new tool lies in its ability to overcome the limitations of previous driver lines that had poor specificity for early progenitor cells and lacked selectivity for later stages of neuronal maturation.
The innovation here is the insertion of a T2A-CreERT2 cassette downstream of the Dcx coding sequence on the X chromosome, which allows for the expression of both Dcx and CreERT2 proteins following the natural expression pattern of the Dcx gene. This driver line has been shown to drive expression of a Cre-dependent reporter in neonatal mice brains and in adult neurogenic niches.
This tool is important as it provides researchers with a more precise method to study the development and integration of adult-born neurons into existing brain circuits, which is crucial for understanding brain plasticity and function. The mouse line has been made available through the Jackson Laboratory, enhancing its accessibility for future research.