0 Patent citations 270 Scholarly citations Reference Count: 45
Sheila R Alcantara Llaguno;Jian Chen;Chang-Hyuk Kwon;Erica L Jackson;Yanjiao Li;Dennis K Burns;Arturo Alvarez-Buylla;Luis F Parada
Summary Malignant astrocytomas are infiltrative and incurable brain tumors. Despite profound therapeutic implications, the identity of the cell (or cells) of origin has not been rigorously determined. We previously reported mouse models based on conditional inactivation of the human astrocytoma-relevant tumor suppressors p53 , Nf1 , and Pten , wherein through somatic loss of heterozygosity, mutant mice develop tumors with 100% penetrance. In the present study, we show that tumor suppressor inactivation in neural stem/progenitor cells is both necessary and sufficient to induce astrocytoma formation. We demonstrate in vivo that transformed cells and their progeny undergo infiltration and multilineage differentiation during tumorigenesis. Tumor suppressor heterozygous neural stem/progenitor cultures from presymptomatic mice show aberrant growth advantage and altered differentiation, thus identifying a pretumorigenic cell population.
University of Texas Southwestern Medical Center;Department of Developmental Biology, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA.University of Texas Southwestern Medical CenterUniversity of Texas Southwestern Medical CenterUniversity of California, San FranciscoUniversity of Texas Southwestern Medical CenterUniversity of Texas Southwestern Medical CenterUniversity of California, San FranciscoUniversity of Texas Southwestern Medical Center