Expression data from wild-type and Robo2 homozygous kidneys
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ABSTRACT:
PROVIDER: PRJNA565060 | ENA |
REPOSITORIES: ENA
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Project description:We used microarrays to detail the global gene expression in tissues from wild-type and Robo2 homozygous kidneys.
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Project description:Transcriptional profiling of mouse embryonic kidneys (E13.5) comparing UB HDAC1,2-/- kidneys with wild type kidneys. Studies in our lab showed that histone deacetylase 1 (HDAC1) and 2 (HDAC2) perform redundant, yet essential functions in the developing mouse ureteric bud (UB) tissue. Double deletion of HDAC1 and HDAC2 in the UB results in impaired UB branching morphogenesis, followed by severe kidney dysgenesis. The goal of the microarray analysis was to identify the genetic pathways controlled by HDAC1 and 2 in the UB. Two-condition experiment: E13.5 mutant kidneys (UB HDAC1,2-/-) vs. E13.5 wild type kidneys . Biological replicates: 4 control replicates, 4 UB HDAC1,2-/- replicates. Two-color Agilent 4x44k chips with dye-swaps on 2 of 4 arrays.
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Project description:CD47 is a key innate immune checkpoint that inhibits phagocytosis by myeloid cells, contributing to immune evasion by cancer cells. Although CD47-blocking antibodies have shown promise in treating various malignancies, their efficacy in glioblastoma (GBM) remains limited, and the cell-intrinsic role of CD47 is poorly understood. In this study, we show that CD47 is highly expressed at the invasive edge of GBM tumors, and its elevated expression correlates with poor patient survival. We demonstrate that CD47 loss impairs GBM cell proliferation, migration, and invasion, independent of immune activity and leads to reduced tumor burden and prolonged survival in vivo. Our study reveals ROBO2 signaling as the downstream effector of CD47 and loss of ROBO2 also attenuates GBM cell proliferation and migration. Importantly, we have uncovered that CD47 stabilizes ROBO2 by sequestering the E3 ubiquitin ligase ITCH, thereby blocking ubiquitination and proteasomal degradation of ROBO2. These findings establish CD47 as a key regulator of GBM cell plasticity, and highlight the therapeutic potential of targeting CD47-ROBO2 signaling in GBM.
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