Glioblastoma Stem Cell Research, Dr. Sheila Singh Laboratory
CurrentCo-Second Author, Nature Medicine: Through integrative genomic analyses and genome-wide genetic perturbation screens, we identified a PTP4A2-ROBO1 axonal guidance signaling axis as a modulator of glioblastoma stem cell migration and tumorgenicity. Targeting this dependency using ROBO1 CAR T cells doubled median survival in patient-derived xenograft models of GBM, and irradicated 50-100% of tumours in brain metastasis and medulloblastoma xenografted mice.First Author, In Progress: Through integrating genome-wide genetic perturbation and chemoradiotherapy-sensitizing screens, we identified FEN1 as a functional driver of both glioblastoma stem cell proliferation and temozolomide resistance. Genetic knockdown of FEN1 significantly increased survival of patient-derived xenograft models of GBM, and FEN1 inhibition has shown marked synergy with temozolomide. Subsequent bulk and single cell RNA sequencing analyses have connected FEN1 dependency to cell stemness. These findings helped support a >$1M CIHR Project Grant for the development of FEN1 inhibitors.