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Neratinib, a Pan ERBB/HER Inhibitor, Restores Sensitivity of PTEN-null, BRAFV600E Melanoma to BRAF/MEK Inhibition

ABSTRACT: Neratinib, a Pan ERBB/HER Inhibitor, Restores Sensitivity of PTEN-null, BRAFV600E Melanoma to BRAF/MEK Inhibition

PROVIDER: PRJNA539979 | ENA |

REPOSITORIES: ENA

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Neratinib, a pan ERBB/HER inhibitor, restores sensitivity of PTEN-null, BRAFV600E melanoma to BRAF/MEK inhibition

Project description:Approximately 50% of melanomas harbor an activating BRAFV600E mutation. Standard of care involves a combination of inhibitors targeting mutant BRAF and MEK1/2, the substrate for BRAF in the MAPK pathway. PTEN loss of function mutations occur in 40% of BRAFV600E melanomas, resulting in increased PI3K/AKT activity that enhances resistance to BRAF/MEK combination inhibitor therapy. To compare the response of PTEN null to PTEN wild type cells in an isogenic background, CRISPR was used to knock out PTEN a melanoma cell line that harbors a BRAFV600E mutation. RNA sequencing and functional kinome analysis revealed the loss of PTEN led to an induction of FOXD3 and an increase in expression of the FOXD3 target gene, ERBB3/HER3. Inhibition of BRAF and MEK1/2 in PTEN null, BRAFV600Ecells dramatically induced expression of ERBB3/HER3 relative to wild type cells. A synergy screen of epigenetic modifiers and kinase inhibitors in combination with BRAFi/MEKi identified the pan ERBB/HER inhibitor, neratinib, as reversing the resistance observed in PTEN null, BRAFV600Ecells. The findings indicate that PTEN null BRAFV600E melanoma exhibits increased reliance on ERBB/HER signaling when treated with clinically approved BRAFi/MEKi combinations. Future studies are warranted to test neratinib reversal of resistance in patient melanomas expressing ERBB3/HER3 in combination with its dimerization partner ERBB2/HER2.

2024-04-23 | GSE255541 | GEO

Neratinib, a pan ERBB/HER inhibitor, restores sensitivity of PTEN-null, BRAFV600E melanoma to BRAF/MEK inhibition

Project description:Neratinib, a pan ERBB/HER inhibitor, restores sensitivity of PTEN-null, BRAFV600E melanoma to BRAF/MEK inhibition

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Neratinib, a Pan ERBB/HER Inhibitor, Restores Sensitivity of PTEN-null, BRAFV600E Melanoma to BRAF/MEK Inhibition

Project description:The A375, human BRAFV600E mutant melanoma, cell line (wildtype), two PTEN-null, BRAFV600E cell lines (KO5 and KO11), and PI3K overexpression cells (WT and PI3K H1047R mutant) were treated with small molecule inhibitors (dabrafenib, BRAF inhibitor; trametinib, MEK inhibitor alone and in combination for 0, 1 and 7 days

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¬The EGFR/ErbB inhibitor neratinib promotes apoptosis and clearance by airway macrophages

Project description:Dysregulated neutrophilic inflammation can be highly destructive in chronic inflammatory diseases due to prolonged neutrophil lifespan and continual release of histotoxic mediators in inflamed tissues. Inducing neutrophil apoptosis, an immunologically silent form of cell death, may be beneficial in these diseases, provided that the apoptotic neutrophils are efficiently cleared from the tissue. Our previous research identified ErbB inhibitors as able to induce neutrophil apoptosis and reduce neutrophilic inflammation both in vitro and in vivo (Rahman et al. 2019). Here we expand on that work using a clinical ErbB inhibitor, neratinib, which has the potential to be repurposed in inflammatory diseases. We show that neratinib reduces neutrophilic migration to an inflammatory site in zebrafish larvae. Neratinib upregulates efferocytosis and reduces the number of dead neutrophils in mouse models of acute, but not chronic, lung injury, suggesting the drug may have therapeutic benefits in acute inflammatory settings. Phosphoproteomics analysis of human neutrophils shows that neratinib modifies the phosphorylation of proteins regulating apoptosis, migration and efferocytosis. This work identifies a potential efficacious mechanism for neratinib in acute lung inflammation by upregulating the clearance of dead neutrophils, and examination of the neutrophil phosphoproteome gives insight into the mechanisms by which this may be occurring.

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RNA-seq to investigate impact of treatment of KRAS mutant A549 lung adenocarcinoma cells with the multi-ERBB inhibitor Neratinib

Project description:KRAS mutation is widely presumed to confer independence from upstream RTK signalling, however emerging evidence from mouse models of lung cancer suggests that ERBB RTKs may amplify signalling through RAS isoforms and participate in mutant RAS-driven lung cancer. This is one of 3 datasets where we examined the transcriptional impact of treatment of KRAS mutant human lung cancer cell lines with the multi-ERBB inhibitor Neratinib

2018-06-01 | E-MTAB-6483 | biostudies-arrayexpress

RNA-seq to investigate impact of treatment of KRAS mutant NCI-H2009 lung adenocarcinoma cells with the multi-ERBB inhibitor Neratinib

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RNA-seq to investigate impact of treatment of KRAS mutant NCI-H358 lung adenocarcinoma cells with the multi-ERBB inhibitor Neratinib

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RNAseq of parental and neratinib resistant 5637 and OVCAR8 cells with or withour neratinib treatment

Project description:Pan-HER TKI neratinib has demonstrated clinical activity in patients with HER2-mutant cancers. However responses are heterogenoeus and not generally prolonged, suggesting de-novo and acquired resistance to neratinib. To study mechanisms of resistance to neratinib we generated neratinib resistant cells by gradual dose escalation until resistance was achieved and performed various analyses including RNAseq.

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Effect of PTEN knockout on dabrafenib-trametinib treatment in A375 melanoma cells - replicate 1

Project description:Approximately 50% of melanomas harbor an activating BRAFV600E mutation. Standard of care involves a combination of inhibitors targeting mutant BRAF and MEK1/2, the substrate for BRAF in the MAPK pathway. PTEN loss of function mutations occur in 40% of BRAFV600E melanomas, resulting in increased PI3K/AKT activity that enhances resistance to BRAF/MEK combination inhibitor therapy. To compare the response of PTEN null to PTEN wild type cells in an isogenic background, CRISPR was used to knock out PTEN in the A375 melanoma cell line that harbors a BRAFV600E mutation. RNA sequencing and functional kinome analysis revealed the loss of PTEN led to an induction of FOXD3 and an increase in expression of the FOXD3 target gene, ERBB3/HER3. Inhibition of BRAFand MEK1/2 in PTEN null, BRAFV600E cells dramatically induced expression of ERBB3/HER3 relative to wild type cells. A synergy screen of epigenetic modifiers and kinase inhibitors in combination with inhibitors for mutant BRAF/MEK1/2 identified the pan ERBB/HER inhibitor, neratinib, as reversing the resistance observed in PTEN null, BRAFV600E cells. The findings indicate PTEN null BRAFV600E melanoma becomes dependent on ERBB/HER signaling when treated with clinically approved BRAF and MEK inhibitors. Future studies are warranted to test neratinib reversal of resistance in patient melanomas expressing ERBB3/HER3 in combination with its dimerization partner ERBB2/HER2.

2024-04-23 | PXD033866 | Pride

Tretinoin synergistically enhances the antitumor effect of combined BRAF, MEK, and EGFR inhibition in BRAFV600E colorectal cancer [HT29 samples]

Project description:Patients with BRAF-mutated colorectal cancer (BRAFV600E CRC) are currently treated by a combination of BRAF inhibitor and anti-EGFR antibody with or without MEK inhibitor. A fundamental problem in treating patients with BRAFV600E CRC is intrinsic and/or acquired resistance to this combination therapy. By screening 78 compounds, we identified tretinoin, a retinoid, as a compound that synergistically enhances the antiproliferative effect of a combination of BRAF inhibition and MEK inhibition with or without EGFR inhibition on BRAFV600E CRC cells. This synergistic effect was also exerted by other retinoids. Tretinoin, added to BRAF inhibitor and MEK inhibitor, upregulated PARP, BAK, and p-H2AX. When either RARα or RXRα was silenced, the increase in cleaved PARP expression by the addition of TRE to ENC/BIN or ENC/BIN/CET was canceled. Our results suggest that the mechanism of the synergistic antiproliferative effect involves modulation of the Bcl-2 family and the DNA damage response that affects apoptotic pathways, and this synergistic effect is induced by RARα- or RXRα-mediated apoptosis. Tretinoin also enhanced the antitumor effect of a combination of BRAF inhibitor and anti-EGFR antibody with or without MEK inhibitor in a BRAFV600E CRC xenograft mouse model. Our data provide a rationale for developing retinoids as a new combination agent to overcome resistance to the combination therapy for patients with BRAFV600E CRC.

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