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Non-small Cell Lung Cancer Brain Metastasis Atlas [TCR-seq]

ABSTRACT: We performed single nuclei RNA-sequencing (snRNA-seq) with matched T cell receptor sequencing (TCR-seq) of 12 treatment-naïve non-small cell lung cancer (NSCLC) primary tumors (PTs) and 31 treatment-naïve NSCLC brain metastases (BMs) .

ORGANISM(S): Homo sapiens

PROVIDER: GSE223500 | GEO | 2025/01/17

REPOSITORIES: GEO

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Transcription profiling of non-small cell lung carcinoma cell line H1975 treated with cisplatin or BMS-69014 a novel panHER/VEGFR inhibitor

Project description:Non-small cell lung cancer (NSCLC) with activating mutations in the epidermal growth factor receptor (EGFR) responds to EGFR tyrosine kinase inhibitors such as erlotinib. However, secondary somatic EGFR mutations (e.g. T790M) confer resistance to erlotinib. BMS-690514, a novel panHER/VEGFR inhibitor described here, exerted antiproliferative and pro-apoptotic effects on NSCLC cell lines, with prominent efficacy on H1975 cells expressing the T790M mutation. In this model, BMS-690514 induced a G1 cell cycle arrest, as well as ultrastructural hallmarks of apoptosis, mitochondrial release of cytochrome c, and activation of caspases involved in the intrinsic (e.g. caspase -2, -3, -7 and -9), but not in the extrinsic (e.g. caspase-8) pathway. Caspase inhibition conferred partial protection against BMS-690514 cytotoxicity, pointing to the involvement of both caspase-dependent and -independent effector mechanisms. Transcriptome analyses revealed the upregulation of pro-apoptotic (e.g. Bim, Puma) and cell cycle inhibitory (e.g. p27Kip1, p57Kip2) factors, as well as the downregulation of anti-apoptotic (e.g. Mcl1), heat shock (e.g. HSP40, HSP70, HSP90) and cell cycle promoting (e.g. cyclins B1, D1 and D3, CDK1, MCM family proteins, PCNA) proteins. BMS-690514-induced death of H1975 cells was modified in a unique fashion by a panel of siRNAs targeting apoptosis modulators. Downregulation of components of the NF-kappaB survival pathway (e.g. p65, Nemo/IKK, TAB2) sensitized cells to BMS-690514, whereas knockdown of pro-apoptotic factors (e.g. Puma, Bax, Bak, caspase-2, etc) and DNA damage-related proteins (e.g. ERCC1, hTERT) exerted cytoprotective effects. BMS-690514 is a new pan-HER/VEGFR inhibitor that may become an alternative to erlotinib for the treatment of NSCLC.

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Downregulation of lncRNA XR_429159.1 could promote brain metastasis in patients with limited-stage small-cell lung cancer

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