Developmental barcoding of whole mouse via homing CRISPR

We present in vivo barcoding in the mouse with multiple homing guide RNAs that each generate hundreds of mutant alleles and combine to produce an exponential diversity of barcodes. Activation upon conception and continued mutagenesis through gestation resulted in developmentally barcoded mice wherein information is recorded in lineage-specific mutations. We used these recordings for reliable post hoc reconstruction of the earliest lineages and investigation of axis development in the brain. Our results provide an enabling and versatile platform for in vivo barcoding and lineage tracing in a mammalian model system.

Source: ScienceNOW - August 30, 2018 Category: Science Authors: Kalhor, R., Kalhor, K., Mejia, L., Leeper, K., Graveline, A., Mali, P., Church, G. M. Tags: Genetics, Online Only, Techniques r-articles Source Type: news