Analysis of the Fetal and Neonatal Transcriptomic and Neurocognitive Phenotype in the Ts1Cje Mouse Model of Down syndrome

ABSTRACT: Down syndrome is characterized by a complex phenotype that includes developmental disabilities and congenital anomalies emerging during fetal life. The molecular origin of these abnormalities is poorly understood. Despite the evidence of prenatal onset of the phenotype, most therapeutic trials have been conducted in affected adults. This study presents evidence for fetal brain molecular and neonatal behavioral abnormalities in the Ts1Cje mouse model of Down syndrome. Gene expression changes were more pronounced in the Ts1Cje fetal brains than adult cerebral cortex and hippocampus. Functional pathway analyses showed that Ts1Cje embryonic brains display significant up-regulation of cell cycle and down-regulation of Solute-carrier amino acid transport pathways. Several cellular processes, including apoptosis, inflammation, Jak/Stat signaling, G-protein signaling and oxidoreductase activity were consistently dysregulated at both stages. Fetal brain gene expression changes were associated with early behavioral deficits in surface righting, cliff aversion, negative geotaxis, forelimb grasp, ultrasonic vocalization and homing tests. In combination with the human studies, this suggests that the Down syndrome phenotype manifests prenatally and provides a rationale for prenatal therapy to improve perinatal brain development and postnatal neurocognition. In the present study, we demonstrated that significant gene expression abnormalities were already present in the embryonic day 15 forebrain of the Ts1Cje mouse model of DS. The abnormal Ts1Cje embryonic molecular signature was associated with early postnatal developmental milestones and behavioral changes. These data provide a comprehensive picture of the genotype-phenotype relationship the Ts1Cje model of Down syndrome.

ORGANISM(S): Mus musculus

PROVIDER: GSE62538 | GEO | 2014/11/15

SECONDARY ACCESSION(S): PRJNA264370

REPOSITORIES: GEO