MYC-driven small-cell lung cancer is metabolically distinct and vulnerable to arginine depletion
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE142496 | GEO | 2019/12/22
REPOSITORIES: GEO
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Project description:PURPOSE:Small-cell lung cancer (SCLC) has been treated clinically as a homogeneous disease, but recent discoveries suggest that SCLC is heterogeneous. Whether metabolic differences exist among SCLC subtypes is largely unexplored. In this study, we aimed to determine whether metabolic vulnerabilities exist between SCLC subtypes that can be therapeutically exploited. EXPERIMENTAL DESIGN:We performed steady state metabolomics on tumors isolated from distinct genetically engineered mouse models (GEMM) representing the MYC- and MYCL-driven subtypes of SCLC. Using genetic and pharmacologic approaches, we validated our findings in chemo-naïve and -resistant human SCLC cell lines, multiple GEMMs, four human cell line xenografts, and four newly derived PDX models. RESULTS:We discover that SCLC subtypes driven by different MYC family members have distinct metabolic profiles. MYC-driven SCLC preferentially depends on arginine-regulated pathways including polyamine biosynthesis and mTOR pathway activation. Chemo-resistant SCLC cells exhibit increased MYC expression and similar metabolic liabilities as chemo-naïve MYC-driven cells. Arginine depletion with pegylated arginine deiminase (ADI-PEG 20) dramatically suppresses tumor growth and promotes survival of mice specifically with MYC-driven tumors, including in GEMMs, human cell line xenografts, and a patient-derived xenograft from a relapsed patient. Finally, ADI-PEG 20 is significantly more effective than the standard-of-care chemotherapy. CONCLUSIONS:These data identify metabolic heterogeneity within SCLC and suggest arginine deprivation as a subtype-specific therapeutic vulnerability for MYC-driven SCLC.
| S-EPMC6697617 | biostudies-literature
Project description:MYC-driven small-cell lung cancer is metabolically distinct and vulnerable to arginine depletion
| PRJNA597163 | ENA
Project description:Distinct SCLC molecular subtypes have been defined based on expression of lineage-related transcription factors: ASCL1, NEUROD1, POU2F3 or YAP1, but their origins remain unknown. To study transcriptional dynamics of MYC-driven tumor evolution and compare transcriptional states to human SCLC tumors, we performed bulk RNA-sequencing on various timepoints of Rb1/Trp53/MycT58A (RPM) tumor cells (from Ad-Cgrp-Cre infected mice) as they progress in culture. These bulk RNA-seq data of the RPM time-series cells complement time-series analysis of single-cell transcriptome profiling of similar timepoints and ultimately reveal that MYC drives the dynamic evolution of SCLC subtypes. We find that MYC promotes a temporal shift from an ASCL1-to-NEUROD1-to-YAP1+ state from a neuroendocrine cell of origin. MYC activates Notch signaling to dedifferentiate tumor cells to non-neuroendocrine fates. These findings support our overall conclusions that genetics, cell of origin, and tumor cell plasticity determine SCLC subtype.
2020-05-28 | GSE149178 | GEO
Project description:Distinct SCLC molecular subtypes have been defined based on expression of lineage-related transcription factors: ASCL1, NEUROD1, POU2F3 or YAP1, but their origins remain unknown. To study transcriptional dynamics of MYC-driven tumor evolution and compare transcriptional states to human SCLC tumors, we performed bulk and single-cell RNA-sequencing on various timepoints of Rb1/Trp53/MycT58A (RPM) tumor cells (from Ad-Cgrp-Cre infected mice) as they progress in culture, and on RPM bulk tumors. Here, to complement these analyses we performed ~30X whole-genome sequencing (WGS) of early (day 4) and late (day 23) time-point RPM tumor cells from culture, along with a matching normal blood control to confirm complete loss of expected regions of Rb1 and Trp53. WGS analyses revealed no detectable copy number variations (CNVs), and SNV analysis suggests that minimal clonal and subclonal evolution occurs in vitro. Together, these data ultimately reveal that MYC drives the dynamic evolution of SCLC subtypes. We find that MYC promotes a temporal shift from an ASCL1-to-NEUROD1-to-YAP1+ state from a neuroendocrine cell of origin. MYC activates Notch signaling to dedifferentiate tumor cells to non-neuroendocrine fates. These findings support our overall conclusions that genetics, cell of origin, and tumor cell plasticity determine SCLC subtype.
2020-05-28 | GSE149444 | GEO
Project description:Distinct SCLC molecular subtypes have been defined based on expression of lineage-related transcription factors: ASCL1, NEUROD1, POU2F3 or YAP1, but their origins remain unknown. We perform bulk RNA-sequencing on SCLC tumors from RPM and Rb1/Trp53/Rbl2 (RPR2) GEMMs, initiated by CGRP-Cre, to complement time-series analysis of single-cell transcriptome profiling and reveal that MYC drives the dynamic evolution of SCLC subtypes. MYC promotes a temporal shift from an ASCL1-to-NEUROD1-to-YAP1+ state from a neuroendocrine cell of origin. MYC activates Notch signaling to dedifferentiate tumor cells to non-neuroendocrine fates. Sequenced RPM tumors driven by MycT58A, in comparison to RPR2 tumors associated with high Mycl, have increased intratumoral subtype heterogeneity by bulk-seq, single-cell RNA seq, and IHC compared to RPR2 tumors. In RPM tumors with high MYC, tumors are able to proceed to non-NE subtypes resembling the NEUROD1+ and YAP1+ human SCLC subtypes. These findings support our overall conclusions that genetics, cell of origin, and tumor cell plasticity determine SCLC subtype.
2020-05-28 | GSE149175 | GEO
Project description:To identify proteomic signatures associated with hepatocellular carcinoma driven by MYC overexpression, proteomics was performed on the LAP-tTA/tetO-MYC mouse conditional liver cancer model. Upon MYC activation, mice form liver cancer. Differential proteomics was performed in "MYC on" (MYC-HCC) mouse liver tumors versus mouse control normal liver tissue (where MYC was not overexpressed to drive tumorigenesis -- "MYC off").
2022-10-12 | PXD031478 | Pride
Project description:Small cell lung cancer (SCLC) frequently harbors mutually exclusive genomic amplification of MYC family members. Therefore, it has been long suggested that they are functionally equivalent; however, more recently, their expression has been associated with specific neuroendocrine markers and distinct histopathology. Integrated transcriptomic and epigenomic analyses showed that c-Myc and L-Myc impart neuronal and non-neuroendocrine associated transcriptional programs, respectively, both associated with distinct SCLC lineage. Genetic replacement of c-Myc with L-Myc in c-Myc-SCLC induced a neuronal state but was insufficient to induce ASCL1 lineage. In contrast, c-Myc induced transition from ASCL1-SCLC to NeuroD1-SCLC characterized by distinct LCNEC-like histopathology. Collectively, we characterize an undescribed role of historically defined general oncogenes, c-Myc and L-Myc, for regulating lineage plasticity across molecular subtypes as well as histological subclasses.
2020-12-31 | GSE156333 | GEO
Project description:Small cell lung cancer (SCLC) frequently harbors mutually exclusive genomic amplification of MYC family members. Therefore, it has been long suggested that they are functionally equivalent; however, more recently, their expression has been associated with specific neuroendocrine markers and distinct histopathology. Integrated transcriptomic and epigenomic analyses showed that c-Myc and L-Myc impart neuronal and non-neuroendocrine associated transcriptional programs, respectively, both associated with distinct SCLC lineage. Genetic replacement of c-Myc with L-Myc in c-Myc-SCLC induced a neuronal state but was insufficient to induce ASCL1 lineage. In contrast, c-Myc induced transition from ASCL1-SCLC to NeuroD1-SCLC characterized by distinct LCNEC-like histopathology. Collectively, we characterize an undescribed role of historically defined general oncogenes, c-Myc and L-Myc, for regulating lineage plasticity across molecular subtypes as well as histological subclasses.
2020-12-31 | GSE156328 | GEO
Project description:To identify the global gene expression changes driven by L-Myc during SCLC development, mRNA expression profiles were compared using total RNAs from preneoplastic precursors of SCLC and the cells transformed by overexpression of L-Myc.
2016-07-12 | GSE77385 | GEO
Project description:Small cell lung cancer (SCLC) is a neuroendocrine tumor treated clinically as a single disease with poor outcomes. Distinct SCLC molecular subtypes have been defined based on expression of lineage-related transcription factors: ASCL1, NEUROD1, POU2F3 or YAP1, but their origins remain unknown. We developed an in vitro model of MYC-driven SCLC tumor cell progression, and performed a time-series analysis of single-cell transcriptome profiling to reveal that MYC drives the dynamic evolution of SCLC subtypes. Analyses of these single-cell RNA seq data reveal that MYC promotes a temporal shift from an ASCL1-to-NEUROD1-to-YAP1+ state from a neuroendocrine cell of origin. MYC activates Notch signaling to dedifferentiate tumor cells to non-neuroendocrine fates. Additional single-cell RNA sequencing of 4RPM tumors reveal individual tumors to consist of cells at nearly every stage of RPM tumor evolution modeled in vitro. With the single-cell RNA sequencing of this human SCLC liver biopsy, along with IHC on a panel of 21 human biopsies, we show that human SCLC exhibits intratumoral SCLC subtype heterogeneity, suggesting this dynamic evolution occurs in patient tumors. Together, these single-cell RNA sequencing data support our conclusions that genetics, cell of origin, and tumor cell plasticity determine SCLC subtype.
2020-05-28 | GSE150766 | GEO