Ugonin inhibits chondrosarcoma metastasis through suppressing cathepsin V via promoting miR-4799-5p expression
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ABSTRACT:
PROVIDER: PRJNA1175665 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR31061206.fastq.gz | Fastqsanger.gz | |||
| SRR31061207.fastq.gz | Fastqsanger.gz | |||
| SRR31061208.fastq.gz | Fastqsanger.gz | |||
| SRR31061209.fastq.gz | Fastqsanger.gz |
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Project description:Chondrosarcoma is a rare type of bone cancer that develops in cartilage cells. Ugonin V is a flavonoid compound that has been extracted from the plant Helminthostachys zeylanica (L.) Hook. This study examined the molecular therapeutic effects of ugonin V on chondrosarcoma metastasis.
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Project description:microRNA-7-5p (miR-7-5p) is an established tumor suppressor in multiple cancer types and inhibits growth and invasion by suppressing expression and activity of the epidermal growth factor receptor (EGFR) signaling pathway. While melanoma is not typically driven by EGFR signaling, expression of miR-7-5p is reduced in metastatic tumors compared to primary melanoma. Here, we investigated the biological and clinical significance of miR-7-5p in melanoma. Our results showed that augmenting miR-7-5p expression in vitro markedly reduced tumor cell viability, colony formation and induced cell cycle arrest. Furthermore, ectopic expression of miR-7-5p reduced migration and invasion of melanoma cells in vitro and reduced melanoma lung colonizationmetastasis in vivo. To investigate the mechanism underlying this effect, we used cDNA microarray analysis to identify a subset of putative miR-7-5p target genes associated with melanoma and metastasis. Of these, we confirmed nuclear factor kappa B (NF-κB) subunit RelA, as a novel direct target of miR-7-5p in melanoma cells, such that miR-7-5p suppresses NF-κB activity to decrease expression of canonical NF-κB target genes, including IL-1a, IL-6 and IL-8. Importantly, the effects of miR-7-5p on melanoma cell growth, cell cycle, migration and invasion were recapitulated by RelA knockdown. Finally, analysis of gene array datasets from multiple melanoma patient cohorts revealed an association between elevated RelA expression and poor survival, further emphasizing the clinical significance of RelA and its downstream signaling effectors.. Taken together, our data suggest that miR-7-5p replacement therapy might have clinical utility in melanoma to inhibit the metastatic process, in part through its inactivation of RelA/NF-kB signaling.
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Project description:Mice bearing primary human chondrosarcoma xenografts were treated with IPI 926, and mRNA levels of known Hh pathway genes and endpoint tumor volumes were measured. Gene expression profiling of IPI-926 treated tumors was conducted to identify potential novel Hh target genes. 4 Control treated and 4 IPI-926 treated NSG Mice. Primary tumor was obtained from a single chondrosarcoma patient.
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Project description:Cathepsin L is a lysosomal protease that is secreted by several cancer cells. Cathepsin L upregulation has been widely associated with poor clinical outcome and increased metastatic incidence. However, whether Cathepsin L participates in tumor angiogenesis remains less studied. Our study showed a significant activation of angiogenic capacity of endothelial cells in presence of purified or tumor derived Cathepsin L. In addition, Cathepsin L exposure led to a significant increase in the proliferative capacity of endothelial cells. While the ability of Cathepsin L to promote endothelial cell sprouting, migration, invasion and tube formation can be attributed to its proteolytic effects on extracellular matrix, how it promotes endothelial cell proliferation remains obscure. The objective of this study was to test if Cathepsin L exposure can activate signaling cascades and gene expression leading to proliferation of endothelial cells.
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