Suppression of Sleeping Beauty-induced Gliomagenicity in Ts1Cje Mice, a Model of Down Syndrome.

ABSTRACT

BACKGROUND/AIM: Individuals with Down syndrome (DS), attributed to triplication of human chromosome 21 (Hsa21), exhibit a reduced incidence of solid tumors. However, the prevalence of glioblastoma among individuals with DS remains a contentious issue in epidemiological studies. Therefore, this study examined the gliomagenicity in Ts1Cje mice, a murine model of DS. MATERIALS AND METHODS: We employed the Sleeping Beauty transposon system for the integration of human oncogenes into cells of the subventricular zone of neonatal mice. RESULTS: Notably, Sleeping Beauty-mediated de novo murine gliomagenesis was significantly suppressed in Ts1Cje mice compared to wild-type mice. In glioblastomas of Ts1je mice, we observed an augmented presence of M1-polarized tumor-associated macrophages and microglia, known for their anti-tumor efficacy in the early stage of tumor development. CONCLUSION: Our findings in a mouse model of DS offer novel perspectives on the diminished gliomagenicity observed in individuals with DS.