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Comprehensive profiing of clinical JAK inhibitors in myeloproliferative neoplasms

ABSTRACT: Comprehensive profiing of clinical JAK inhibitors in myeloproliferative neoplasms

PROVIDER: PRJNA955676 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24172869_1.fastq.gz	Fastqsanger.gz
	SRR24172869_2.fastq.gz	Fastqsanger.gz
	SRR24172870_1.fastq.gz	Fastqsanger.gz
	SRR24172870_2.fastq.gz	Fastqsanger.gz
	SRR24172871_1.fastq.gz	Fastqsanger.gz

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Comprehensive profiing of clinical JAK inhibitors in myeloproliferative neoplasms

Project description:Comprehensive profiing of clinical JAK inhibitors in myeloproliferative neoplasms

2023-05-24 | GSE229712 | GEO

Myelodysplastic/myeloproliferative neoplasms

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Comprehensive review of JAK inhibitors in myeloproliferative neoplasms.

Project description:Myeloproliferative neoplasms (MPNs) are clonal hematopoietic stem-cell disorders, characterized phenotypically by the abnormal accumulation of mature-appearing myeloid cells. Polycythemia vera, essential thrombocythemia, primary myelofibrosis (also known as 'BCR-ABL1-negative' MPNs), and chronic myeloid leukemia (CML) are the primary types of MPNs. After the discovery of the BCR-ABL1 fusion protein in CML, several oncogenic tyrosine kinases have been identified in 'BCR-ABL1-negative' MPNs, most importantly, JAK2V617F mutation. The similarity in the clinical characteristics of the BCR-ABL1-negative MPN patients along with the prevalence of the Janus kinase mutation in this patient population provided a strong rationale for the development of a new class of pharmacologic inhibitors that target this pathway. The first of its class, ruxolitinib, has now been approved by the food and drug administration (FDA) for the management of patients with intermediate- to high-risk myelofibrosis. Ruxolitinib provides significant and sustained improvements in spleen related and constitutional symptoms secondary to the disease. Although noncurative, ruxolitinib represents a milestone in the treatment of myelofibrosis patients. Other types of JAK2 inhibitors are being tested in various clinical trials at this point and may provide better efficacy data and safety profile than its predecessor. In this article, we comprehensively reviewed and summarized the available preclinical and clinical trials pertaining to JAK inhibitors.

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Pathophysiology of arterial cardiovascular events in patients with JAK2V617F myeloproliferative neoplasms

Project description:Cardiovascular events are the leading cause of death in patients with JAK2V617F myeloproliferative neoplasms. Their mechanisms are poorly understood. To investigate the role of microvesicles in these events, we performed a proteomic analysis of microvesicles derived from red blood cells from mice with a myeloproliferative neoplasms (Jak2V617F Flex/WT ;VE-cadherin-Cre) vs. littermate controls.

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Project description:The mechanisms that mediate transformation in MPN are not fully delineated and clinically utilized JAK inhibitors have limited ability to reduce disease burden or reverse myelofibrosis. Here we show that MPN progenitor cells are characterized by marked alterations in gene regulation through differential enhancer utilization, and identify Nfb signaling as a key pathway activated in malignant and non-malignant cells in MPN. Genetic and functional studies underscore the central role of JAK/STAT signaling in myeloproliferative neoplasms (MPNs). However, the mechanisms that mediate transformation in MPNs are not fully delineated, and clinically utilized JAK inhibitors have limited ability to reduce disease burden or reverse myelofibrosis. Here we show that MPN progenitor cells are characterized by marked alterations in gene regulation through differential enhancer utilization, and identify nuclear factor kB (NF-kB) signaling as a key pathway activated in malignant and non-malignant cells in MPN. Inhibition of BET bromodomain proteins attenuated NF-kB signaling and reduced cytokine production in vivo. Most importantly, combined JAK/BET inhibition resulted in a marked reduction in the serum levels of inflammatory cytokines, reduced disease burden, and reversed bone marrow fibrosis in vivo.

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