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PLK1 and NOTCH Positively Correlate in Melanoma and their Combined Inhibition Results in Synergistic Modulations of Key Melanoma Pathways

ABSTRACT: PLK1 and NOTCH Positively Correlate in Melanoma and their Combined Inhibition Results in Synergistic Modulations of Key Melanoma Pathways

PROVIDER: PRJNA667696 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12780541_1.fastq.gz	Fastqsanger.gz
	SRR12780541_2.fastq.gz	Fastqsanger.gz
	SRR12780542_1.fastq.gz	Fastqsanger.gz
	SRR12780542_2.fastq.gz	Fastqsanger.gz
	SRR12780543_1.fastq.gz	Fastqsanger.gz

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PLK1 and NOTCH Positively Correlate in Melanoma and their Combined Inhibition Results in Synergistic Modulations of Key Melanoma Pathways

Project description:Melanoma is one of the most serious forms of skin cancer, and its increasing incidence coupled with non-lasting therapeutic options for metastatic disease highlight the need for additional novel approaches for its management. In this study, we determined the potential interactions between polo-like kinase 1 (PLK1, a serine/threonine kinase involved in mitotic regulation) and NOTCH1 (a type I transmembrane protein deciding cell fate during development) in melanoma. Employing an in-house human melanoma tissue microarray (TMA) containing multiple cases of melanomas and benign nevi, coupled with high-throughput, multispectral quantitative fluorescence imaging analysis, we found a positive correlation between PLK1 and NOTCH1 in melanoma. Further, TCGA database analysis of melanoma patients showed an association of higher mRNA levels of PLK1 and NOTCH1 with poor overall as well as disease-free survival. Next, utilizing small-molecule inhibitors of PLK1 and NOTCH (BI 6727 and MK-0752, respectively), we found a synergistic anti-proliferative response of combined treatment in multiple human melanoma cells. To determine the molecular targets of the overall and synergistic responses of combined PLK1-NOTCH inhibition, we conducted RNA-sequencing analysis employing a unique regression model with interaction terms. We identified the modulations of several key genes relevant to melanoma progression/metastasis, including MAPK, PI3K, and RAS, as well as some new genes such as Apobec3G, BTK and FCER1G which have not been well-studied in melanoma. In conclusion, our study demonstrated a synergistic anti-proliferative response of a concomitant targeting of PLK1 and NOTCH in melanoma, unravelling a potential novel therapeutic approach for detailed preclinical/clinical evaluation.

2020-10-07 | GSE159095 | GEO

Role of PLK1 in epithelial-mesenchymal transition in human melanoma

Project description:Polo-like kinase 1 (PLK1), a serine/threonine kinase and important cell cycle regulator, is overexpressed in melanoma and its expression has been associated with poor disease prognosis. PLK1 has been shown to interact with NUMB, a NOTCH antagonist. However, the exact role of PLK1-NUMB-NOTCH axis in epithelial-mesenchymal transition (EMT) and melanoma progression is unclear. In this study, Affymetrix microarray analysis was performed to determine differentially expressed genes following doxycyclin induced shRNA-mediated knockdown of PLK1 in human melanoma cells that showed significant modulations in EMT and metastasis related genes.

2024-01-01 | GSE237385 | GEO

PLK1 and NOTCH Positively Correlate in Melanoma and Their Combined Inhibition Results in Synergistic Modulations of Key Melanoma Pathways.

Project description:Melanoma is one of the most serious forms of skin cancer, and its increasing incidence coupled with nonlasting therapeutic options for metastatic disease highlights the need for additional novel approaches for its management. In this study, we determined the potential interactions between polo-like kinase 1 (PLK1, a serine/threonine kinase involved in mitotic regulation) and NOTCH1 (a type I transmembrane protein deciding cell fate during development) in melanoma. Employing an in-house human melanoma tissue microarray (TMA) containing multiple cases of melanomas and benign nevi, coupled with high-throughput, multispectral quantitative fluorescence imaging analysis, we found a positive correlation between PLK1 and NOTCH1 in melanoma. Furthermore, The Cancer Genome Atlas database analysis of patients with melanoma showed an association of higher mRNA levels of PLK1 and NOTCH1 with poor overall, as well as disease-free, survival. Next, utilizing small-molecule inhibitors of PLK1 and NOTCH (BI 6727 and MK-0752, respectively), we found a synergistic antiproliferative response of combined treatment in multiple human melanoma cells. To determine the molecular targets of the overall and synergistic responses of combined PLK1 and NOTCH inhibition, we conducted RNA-sequencing analysis employing a unique regression model with interaction terms. We identified the modulations of several key genes relevant to melanoma progression/metastasis, including MAPK, PI3K, and RAS, as well as some new genes such as Apobec3G, BTK, and FCER1G, which have not been well studied in melanoma. In conclusion, our study demonstrated a synergistic antiproliferative response of concomitant targeting of PLK1 and NOTCH in melanoma, unraveling a potential novel therapeutic approach for detailed preclinical/clinical evaluation.

| S-EPMC7790869 | biostudies-literature

Mitochondrial signatures shape phenotype switching and apoptosis in response to PLK1 and RSK inhibitiors in melanoma

Project description:PLK1 inhibitors are emerging anti-cancer agents being tested in monotherapy and combination therapies for various cancers. Although PLK1 inhibition in experimental models shows potent antitumor effects, translation to the clinic has been hampered by low antitumor activity and tumor relapse. Here, we report the identification of mitochondrial protein signatures that determine sensitivity to approaches targeting PLK1 in human melanoma cell lines. In response to PLK1 inhibition or gene silencing, resistant cells adopt a pro-inflammatory and dedifferentiated phenotype, while sensitive cells engage apoptosis. Mitochondrial DNA depletion and silencing of the ABCD1 transporter sensitize cells to PLK1 inhibition and attenuate the associated pro-inflammatory response. We also found that non-selective inhibitors of the p90 ribosomal S6 kinase (RSK) exert their anti-proliferative and pro-inflammatory effects via PLK1 inhibition. This work reveals overlooked impacts of PLK1 on phenotype switching and suggests that mitochondrial precision medicine can help improve response to targeted therapies.

2024-06-14 | GSE264686 | GEO

Role of PLK1 in epithelial-mesenchymal transition in human melanoma

Project description:Role of PLK1 in epithelial-mesenchymal transition in human melanoma

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Expression profile in Plk1(+/-) aortas

Project description:Transcriptional profiling of mouse aortas comparing control wild-type animals with aortas from three different Plk1(+/-) mice. Goal was to determine the effects of Plk1 haploinsufficiency in aorta expression profiles.

2017-07-01 | GSE85199 | GEO

Genetic enhancers of partial PLK1 inhibition reveal hypersensitivity to kinetochore perturbations

Project description:Polo-like kinase 1 (PLK1) is a serine/threonine kinase required for mitosis and cytokinesis. As cancer cells are often hypersensitive to partial PLK1 inactivation, chemical inhibitors of PLK1 have been developed and tested in clinical trials. However, these molecules alone were not completely effective. PLK1 promotes numerous molecular and cellular events in the cell division cycle. To date, it is unclear which of these events most crucially depend on PLK1 activity. We used a CRISPR-based genome-wide screening strategy to identify genes whose inactivation enhances cell proliferation defects upon partial chemical inhibition of PLK1. Genes identified encode proteins that are functionally linked to PLK1 in multiple ways. Among them, factors that promote centromere and kinetochore function were clearly enriched. In particular, inactivation of the kinesin KIF18A or SKA1 in PLK1-compromised cells results in mitotic defects, activation of the spindle assembly checkpoint and nuclear reassembly defects. Our results suggest that functions of PLK1 at kinetochores are most sensitive to its inhibition, and point at KIF18A as a possible target for combinatorial therapies using existing PLK1 inhibitors.

2023-10-02 | GSE228155 | GEO

PLK1 signaling coopereates with estrogen receptor-dependent gene transcription.

Project description:Analysis of MCF7 breast cancer cells treated with estadiol for 6 h in presence or absence of the specific PLK1 inhibitor BI2536. Together with CHIP and global phosphoproteome data, the results demonstrate a key role of PLK1 in the estrogen receptor-mediated gene response. Hormone-deprived MCF7 cells were pretreated with BI2536 or vehicle (DMSO) followed by induction with estradiol (E2) or vehicle (ethanol). RNA of each condition was analysed in triplicate on an Agilent Human genome 4x44k v2 microarray [note: MCF7_DMSO_E2_rep3 sample was a clear technical outlier (poor hybridization), and was therefore excluded from the further analysis/this record].

2014-01-01 | E-GEOD-46856 | biostudies-arrayexpress

Inflammatory B cells correlate with failure to checkpoint blockade in melanoma patients

Project description:Inflammatory B cells correlate with failure to checkpoint blockade in melanoma patients

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Histone variant H2A.Z.2 mediates proliferation and drug sensitivity of malignant melanoma (expression)

Project description:Here we report a novel role for H2A.Z.2 (H2AFV) as a mediator of cell proliferation and sensitivity to targeted therapies in malignant melanoma. While both H2A.Z.1 and H2A.Z.2 are highly expressed in metastatic melanoma and correlate with decreased patient survival, only H2A.Z.2 deficiency results in impaired cellular proliferation of melanoma cells, which occurs via a G1/S arrest. Integrated gene expression and ChIP-seq analyses revealed that H2A.Z.2 positively regulates E2F target genes, and that such genes acquire a distinct H2A.Z occupancy signature over the promoter and gene body in metastatic melanoma cells. We further identified the BET family member BRD2 as an H2A.Z-interacting protein in melanoma cells, and demonstrate that H2A.Z.2 silencing cooperates with BET inhibition to induce cell death. Total RNA samples from SKmel147 melanoma cell line. Transcript levels were analyzed after control or H2AZ variant RNA interference.

2015-07-01 | E-GEOD-59026 | biostudies-arrayexpress

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