Targeting NTRK1 Enhances Immune Checkpoint Inhibitor Efficacy in NTRK1 Wild-type Non-Small Cell Lung Cancer
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE274960 | GEO | 2024/08/20
REPOSITORIES: GEO
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Project description:The polycomb repressor complex 2 molecule EZH2 is now known to play a role in essential cellular processes, namely, cell fate decisions, cell cycle regulation, senescence, cell differentiation, and cancer development/progression. EZH2 inhibitors have recently been developed; however, their effectiveness and underlying molecular mechanisms in many malignancies have not yet been elucidated in detail. Although the functional role of EZH2 in tumorigenesis in neuroblastoma (NB) has been investigated, mutations of EZH2 have not been reported. A Kaplan-Meier analysis on the event free- and overall survival of NB patients indicated that the highexpression of EZH2 correlated with an unfavorable prognosis. In order to elucidate the functional roles of EZH2 in NB tumorigenesis and its aggressiveness, we knocked down EZH2 in NB cell lines using lentivirus systems. The knockdown of EZH2 significantly induced NB cell differentiation, e.g. neurite extension, and the neuronal differentiation markers, NF68 and GAP43. EZH2 inhibitors also induced NB cell differentiation. We performed a comprehensive transcriptome analysis using Human Gene Expression Microarrays and found that NTRK1 (TrkA) is one of the EZH2-related suppression targets. The depletion of NTRK1 canceled EZH2 knockdown-induced NB cell differentiation. Our integrative methylome, transcriptome, and chromatin immunoprecipitation assays using NB cell lines and clinical samples clarified that the NTRK1 P1 and P2 promoter regions were regulated differently by DNA methylation and EZH2-related histone modifications. The NTRK1 transcript variants 1/2, which were regulated by EZH2-related H3K27me3 modifications at the P1 promoter region, were strongly expressed in favorable, but not unfavorable NB. The depletion and inhibition of EZH2 successfully induced NTRK1 transcripts and functional proteins. Collectively, these results indicate that EZH2 plays important roles in preventing the differentiation of NB cells and also that EZH2-related NTRK1 transcriptional regulation may be the key pathway for NB cell differentiation.
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Project description:The identification and clinical validation of cancer driver genes are essential to accelerate the translational transition of cancer genomics, as well as to find clinically confident targets for the therapeutic intervention of cancers. Here we identified recurrent LMNA-NTRK1 and TPM3-NTRK1 fusions in Korean patients with colon cancer (3 out of 147, 2%) through next-generation RNA sequencing (RNA-seq). NTRK1 fusions were mutually exclusive oncogenic drivers of colon cancer that were accompanied with in vitro potential of colony formation and in vivo tumorigenicity comparable to KM12, a human colon cancer cell line harboring TPM3-NTRK1 fusion. NTRK1-encoded TrkA protein was prevalent in 11 out of 216 Korean (5.1%) and 28 out of 472 Chinese patients (5.9%) from independent cohorts, respectively. The expression level of TrkA was significantly correlated with NTRK1 fusion (p = 0.0192), which was verified by a fluorescence in situ hybridization (FISH). Korean patients with TrkA-positive colon cancer had a marginal but significant shorter overall survival time than TrkA-negative colon cancer [hazard ratio (HR) = 0.5346, 95% confidential interval (CI) = 0.2548-0.9722, p = 0.0411]. In addition, KM12 cell line was sensitive to selective TrkA inhibitors. These results demonstrate that NTRK1 fusion is granted as a clinically relevant target for therapeutic intervention of colon cancer.
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Project description:Simple Summary: Neuroblastoma (NB) accounts for 15% of all cancer related deaths of children. While amplification of the Myc-N proto-oncogene (MYCN) is a major driver of NB, expression of the neurotrophin receptor, NTRK1/TrkA, has been shown to associate with an excellent outcome. MYCN down-regulates NTRK1 expression, but it is unknown if the molecular effects of NTRK1 signaling also affect MYCN-induced networks. The aim of this study was to decipher NTRK1 signaling using an unbiased proteome and phosphoproteome approach. To this end, we realized inducible ectopic NTRK1-expression in a NB cell line with MYCN amplification and analyzed the proteomic changes upon NTRK1-activation in a time-dependent manner. In line with phenotypes observed, NTRK1-activation induced markers of neuronal differentiation and cell cycle arrest. Most prominently, NTRK1 upregulated expression and phosphorylation of the nuclear lamina component Lamin A/C. Moreover, NTRK1 signaling also induced aggregation of LMNA within nucleic foci, which accompanies differentiation in other cell types. Abstract: Background: Neuroblastomas (NB) are the most common extracranial solid tumors of childhood. Amplification of the Myc-N proto-oncogene (MYCN) is a major driver of NB aggressiveness, while high expression of the neurotrophin receptor NTRK1/TrkA is associated with mild disease courses. The molecular effects of NTRK1 signaling in MYCN-amplified NB, however, are still poorly understood and require elucidation. Methods: Inducible NTRK1-expression was realized in four NB cell lines with (IMR5, NGP) or without MYCN amplification (SKNAS, SH-SY5Y). Proteome and phosphoproteome dynamics upon NTRK1-activation by its ligand, NGF, were analyzed in a time-dependent manner in IMR5 cells. Target validation by immunofluorescence staining and automated image processing was performed using the three other NB cell lines. Results: In total, 230 proteins and 134 single phosphorylated class I phosphosites were found to be significantly regulated upon NTRK1 activation. Among known NTRK1-targets, Stathmin and the neurosecretory protein VGF were recovered. Additionally, we observed upregulation and phosphorylation of Lamin A/C (LMNA) that accumulated inside nuclear foci. Conclusions: We provide a comprehensive picture of NTRK1-induced proteome and phosphoproteome dynamics. Phosphorylation of LMNA within nucleic aggregates was identified as a prominent feature of NTRK1 signaling independent of the MYCN status of NB cells.
2021-11-11 | PXD026876 | Pride
Project description:Simple Summary: Neuroblastoma (NB) accounts for 15% of all cancer related deaths of children. While amplification of the Myc-N proto-oncogene (MYCN) is a major driver of NB, expression of the neurotrophin receptor, NTRK1/TrkA, has been shown to associate with an excellent outcome. MYCN down-regulates NTRK1 expression, but it is unknown if the molecular effects of NTRK1 signaling also affect MYCN-induced networks. The aim of this study was to decipher NTRK1 signaling using an unbiased proteome and phosphoproteome approach. To this end, we realized inducible ectopic NTRK1-expression in a NB cell line with MYCN amplification and analyzed the proteomic changes upon NTRK1-activation in a time-dependent manner. In line with phenotypes observed, NTRK1-activation induced markers of neuronal differentiation and cell cycle arrest. Most prominently, NTRK1 upregulated expression and phosphorylation of the nuclear lamina component Lamin A/C. Moreover, NTRK1 signaling also induced aggregation of LMNA within nucleic foci, which accompanies differentiation in other cell types. Abstract: Background: Neuroblastomas (NB) are the most common extracranial solid tumors of childhood. Amplification of the Myc-N proto-oncogene (MYCN) is a major driver of NB aggressiveness, while high expression of the neurotrophin receptor NTRK1/TrkA is associated with mild disease courses. The molecular effects of NTRK1 signaling in MYCN-amplified NB, however, are still poorly understood and require elucidation. Methods: Inducible NTRK1-expression was realized in four NB cell lines with (IMR5, NGP) or without MYCN amplification (SKNAS, SH-SY5Y). Proteome and phosphoproteome dynamics upon NTRK1-activation by its ligand, NGF, were analyzed in a time-dependent manner in IMR5 cells. Target validation by immunofluorescence staining and automated image processing was performed using the three other NB cell lines. Results: In total, 230 proteins and 134 single phosphorylated class I phosphosites were found to be significantly regulated upon NTRK1 activation. Among known NTRK1-targets, Stathmin and the neurosecretory protein VGF were recovered. Additionally, we observed upregulation and phosphorylation of Lamin A/C (LMNA) that accumulated inside nuclear foci. Conclusions: We provide a comprehensive picture of NTRK1-induced proteome and phosphoproteome dynamics. Phosphorylation of LMNA within nucleic aggregates was identified as a prominent feature of NTRK1 signaling independent of the MYCN status of NB cells.
2021-11-11 | PXD026913 | Pride
Project description:Background. NTRK1 gene, encoding TrkA, is essential for the nervous system and drives a variety of biological processes, including pain. Given the unsatisfied analgesic effects of some new drugs targeting NTRK1 in clinic, a deeper understanding for the mechanism of NTRK1 in neurons is crucial. Methods. We assessed the transcriptional responses in SH-SY5Y cells with NTRK1 overexpression using bioinformatics analysis. GO and KEGG analyses were performed, PPI networks were constructed, and the functional modules and top 10 genes were screened. Subsequently, hub genes were validated using RT-qPCR. Results. A total of 419 DEGs were identified, including 193 upregulated and 226 downregulated genes. GO showed that upregulated genes were mainly enriched in response to endoplasmic reticulum (ER) stress, protein folding in ER, etc., and downregulated genes were highly enriched in a series of cellular parts and cellular processes. KEGG showed DEGs were enriched in protein processing in ER and pathways associated with cell proliferation and migration. The finest module was dramatically enriched in the ER stress response-related biological process. The verified 7 hub genes consisted of 5 upregulated genes (COL1A1, P4HB, HSPA5, THBS1, and XBP1) and 2 downregulated genes (CCND1 and COL3A1), and almost all were correlated with response to ER stress. Conclusion. Our data demonstrated that NTRK1 significantly influenced the gene transcription of ER stress response in SH-SY5Y cells. It indicated that ER stress response could contribute to various functions of NTRK1-dependent neurons, and therefore, ER stress response-associated genes need further study for neurological dysfunction implicated in NTRK1.
2023-03-22 | GSE221028 | GEO
Project description:The intestinal microbiome has been associated with response to immune checkpoint inhibitors (ICI) in humans, and causally implicated in ICI responsiveness in animal models. Therapeutic augmentation of the microbiome in ICI recipients is being investigated in multiple ongoing human clinical trials. We conducted an early phase clinical trial of a cultivated, orally-delivered 30-species microbial consortium (microbial ecosystem therapeutic-4, MET4) designed for co-administration with ICIs and assessed safety, tolerability and ecological responses in patients with advanced solid tumors.
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