Ontology highlight
ABSTRACT:
OTHER RELATED OMICS DATASETS IN: GSE21032phs000310.v1.p1
PROVIDER: PRJNA126455 | ENA |
REPOSITORIES: ENA
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Project description:Advanced prostate cancer is often associated with the emergence of more aggressive disease phenotypes, including neuroendocrine prostate cancer (NEPC), which are currently incurable. To identify drivers of aggressive prostate cancer, we conducted a Sleeping Beauty (SB) transposon mutagenesis screen based on a mouse model having conditional loss of function of Pten and Tp53 prostate (NPp53). Compared with the control mice (NPp53-SB(—)), the experimental mice (NPp53-SB(+)) develop aggressive prostate cancer phenotypes that are highly heterogeneous and highly metastasis. Most notably, a high percentage of NPp53-SB(+) prostate tumors have features of NEPC, which are conserved with human prostate cancer. To identify and prioritize drivers of NEPC in these NPp53-SB(+) tumors, we used a novel integrative approach that combines (i) genomic analyses of common insert sites (CIS) for the SB transposon, (ii) VIPER analyses of control NPp53-SB(+) prostate tumors to identify master regulators (MRs) enriched in NEPC, and (iii) comparative transcriptomic analyses with data from human prostate cancer patients followed by integrative analyses using of these data using a CINDy algorithm to identify CIS-associated genes that modulate the NEPC phenotypes. Among these the nicotinamide adenosine dinucleotide (NAD)-dependent deacetylase, sirtuin 1 (Sirt1). Loss- and gain-of-function studies in human prostate cancer cell lines showed that SIRT1 promotes NEPC, while its depletion or inhibition reduces NEPC. Overall, this integrative phenotypic and systems analyses have identified of candidate drivers of NEPC and may be generalizable to analyzing and interpreting data from analogous in vivo mutagenesis screens.
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Project description:Advanced prostate cancer is often associated with the emergence of more aggressive disease phenotypes, including neuroendocrine prostate cancer (NEPC), which are currently incurable. To identify drivers of aggressive prostate cancer, we conducted a Sleeping Beauty (SB) transposon mutagenesis screen based on a mouse model having conditional loss of function of Pten and Tp53 prostate (NPp53). Compared with the control mice (NPp53-SB(—)), the experimental mice (NPp53-SB(+)) develop aggressive prostate cancer phenotypes that are highly heterogeneous and highly metastasis. Most notably, a high percentage of NPp53-SB(+) prostate tumors have features of NEPC, which are conserved with human prostate cancer. To identify and prioritize drivers of NEPC in these NPp53-SB(+) tumors, we used a novel integrative approach that combines (i) genomic analyses of common insert sites (CIS) for the SB transposon, (ii) VIPER analyses of control NPp53-SB(+) prostate tumors to identify master regulators (MRs) enriched in NEPC, and (iii) comparative transcriptomic analyses with data from human prostate cancer patients followed by integrative analyses using of these data using a CINDy algorithm to identify CIS-associated genes that modulate the NEPC phenotypes. Among these the nicotinamide adenosine dinucleotide (NAD)-dependent deacetylase, sirtuin 1 (Sirt1). Loss- and gain-of-function studies in human prostate cancer cell lines showed that SIRT1 promotes NEPC, while its depletion or inhibition reduces NEPC. Overall, this integrative phenotypic and systems analyses have identified of candidate drivers of NEPC and may be generalizable to analyzing and interpreting data from analogous in vivo mutagenesis screens.
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