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RNA-seq of detecting the effect of CDK4&6 inhibitor Abemaciclib and VSV-M51 in glioma

ABSTRACT: RNA-seq of detecting the effect of CDK4&6 inhibitor Abemaciclib and VSV-M51 in glioma

PROVIDER: PRJNA702285 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13729776.fastq.gz	Fastqsanger.gz
	SRR13729777.fastq.gz	Fastqsanger.gz
	SRR13729778.fastq.gz	Fastqsanger.gz
	SRR13729779.fastq.gz	Fastqsanger.gz
	SRR13729780.fastq.gz	Fastqsanger.gz

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RNA-seq of detecting the effect of CDK4&6 inhibitor Abemaciclib and VSV-M51 in glioma

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RNA-seq analysis of MCF7 cells treated with abemaciclib, SR11302

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Project description:Resistance to CDK4/6 inhibitors plus endocrine therapy, standard of care for HR+/HER2-neg metastatic breast cancer (MBC) patients, remains as a clinical problem with limited therapeutic options after disease progression. Treatment with abemaciclib after progression on a prior CDK4/6i has received increasing interest. However, molecular predictors of cross-resistance and unique mechanism of resistance to each CDK4/6i are unknown. In this study, multiomics analyses revealed ≥30 differentially altered pathways between palbociclib and abemaciclib resistant models. Mechanistic, preclinical and retrospective clinical evidence showed that HR+/HER2-neg MBC tumors refractory to palbociclib still may be responsive to abemaciclib. Based on the unique mechanisms of resistance to each CDK4/6i, we propose that patients who would benefit from abemaciclib treatment post progression on palbociclib could be selected based on the Hallmark gene set enrichment of G2/M pathway, while those who most probably would be refractory could be identified base on the gene set enrichment of OXPHOS pathway.

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Project description:Current research on CDK4/6 inhibitors (CDK4/6i) in the pre-clinical and clinical spaces are largely concerned with gaining a deeper understanding of how these drugs delay tumor growth, and how to prevent cancer cell resistance. By coordinating a first-in-kind phase II clinical trial of the CDK4/6i abemaciclib for patients with progressive dedifferentiated liposarcoma (DDLS) with cellular studies to identify the molecular basis of geroconversion, we have defined how therapy induced senescence contributes to disease management. Thirty patients with progressing DDLS enrolled in the clinical trial and were treated with 200mg abemaciclib twice daily. The median progression free survival was 33 weeks at the time of the data lock, with 23 of 30 progression-free at 12 weeks (76.7%, two-sided 95% CI 57.7% - 90.1%). ANGPTL4 is a necessary late regulator of geroconversion, the pathway from reversible cell cycle exit to a stably arrested inflammation-provoking senescent cell, in liposarcoma cell lines treated with CDK4/6i. Using ANGPTL4 and CDKN2A expression, we were able to identify patients in which abemaciclib induced tumor cell senescence. We were then able to correlate this with outcomes. Senesence correlated with increased leukocyte infiltration, primarily CD4-positive cells, within a month of therapy, and possibly with an improved initial response to abemaciclib. However, those individuals with both senescence and increased TILs were also more likely to acquire resistance after six months of therapy. This suggests that combining senolytics with abemaciclib in a subset of patients may improve the durability of patient responses to this class of compounds.

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