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RNA-Seq profiling of circular RNAs in human colorectal cancer 5-fluorouracil resistance and the potential biomarkers

ABSTRACT: RNA-Seq profiling of circular RNAs in human colorectal cancer 5-fluorouracil resistance and the potential biomarkers

PROVIDER: PRJNA752379 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15354959_1.fastq.gz	Fastqsanger.gz
	SRR15354959_2.fastq.gz	Fastqsanger.gz
	SRR15354960_1.fastq.gz	Fastqsanger.gz
	SRR15354960_2.fastq.gz	Fastqsanger.gz
	SRR15354961_1.fastq.gz	Fastqsanger.gz

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RNA-Seq profiling of circular RNAs in human colorectal cancer 5-fluorouracil resistance and the potential biomarkers

Project description:Colorectal cancer（CRC）is a commonly diagnosed cancer of the digestive system worldwide. Although chemotherapeutic agents and targeted therapeutic drugs are currently available for CRC treatment, drug resistance is a problem that cannot be ignored and needs to be solved. 5-Fluorouracil (5-Fu) is a first-line chemotherapeutic agent for colorectal cancer, to explore the role of circular RNA (circRNA) in 5-Fu resistance, we performed the circRNA expression profile in two CRC cell lines and their homologous 5-Fu resistant cells by high-throughput sequencing. We validated the differentially expressed circRNAs in other two paired CRC cells, confirmed that circ_0002813 and circ_0000236 could have a potential ceRNA mechanism and be involved in the formation of 5-Fu resistance. And we combined the sequencing results of mRNA to construct the regulatory network of circRNA-miRNA-mRNA. Our study revealed that circ_0002813 and circ_0000236 may as the biomarkers to predict the occurrence of 5-Fu resistance in CRC.

2024-08-05 | GSE181537 | GEO

Identification of Blood Circular RNAs as the Potential Biomarkers for Acute Ischemic Stroke

Project description:Identification of Blood Circular RNAs as the Potential Biomarkers for Acute Ischemic Stroke

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Circular DNA tumor viruses make circular RNAs

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Identification of Blood Circular RNAs as the Potential Biomarkers for Acute Ischemic Stroke

Project description:Many hospitals lack facilities for accurate diagnosis of acute ischemic stroke (AIS). Circular RNA (circRNA) is highly expressed in the brain and is closely associated with stroke. In this study, we examined whether the blood-borne circRNAs can be promising candidates as adjunctive diagnostic biomarkers and their pathophysiological roles after stroke. We profiled the blood circRNA expression in mice subjected to experimental focal cerebral ischemia, and validated the selected circRNAs in AIS patients. We demonstrated that 128, 198 and 789 circRNAs were significantly altered at 5 min, 3 h and 24 h after ischemic stroke, respectively.

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Circular RNAs expression profiling in human colorectal cancer

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Circular RNAs expression profiles and potential key molecules incompletely transected spinal cord injury.

Project description:Circular RNA is implicated in numerous diseases and conditions, including traumatic injury to the central nervoussystem. However, we know little regarding their role in completely transected spinal cord injury (SCI). Our studyused high-throughput sequencing to analyze circular RNA expression in rats after experimental completetransection of spinal cord. We found differential expression in 400 circular RNAs after SCI, with 249 significantlyup-regulated and 151 significantly down-regulated. We then selected five circular RNAs for qRT-PCR validation,and the results were in agreement with RNA sequencing. Additionally, we predicted the function of circular RNAin SCI through GO and KEGG analyses, as well as the construction of circRNA/microRNA interaction networks.Furthermore, we identified circular RNA chr9:1829226-1834212 and mRNA Hdac11 as key molecules after SCI.In conclusion, this study is the first to characterize circular RNA function in rats after completely transected SCI,through identifying their differential expression. Our results provide insight into the mechanism and therapeutictargets of SCI.

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RNA-Seq profiling of circular RNAs in colorectal cancer and circST7L as a potential biomarker

Project description:Aberrant expression of circular RNAs (circRNAs) has been reported in a variety of cancers. CircRNAs may serve as candidate biomarkers and have implications for cancer diagnosis and treatment. RNA-sequencing (RNA-seq) was applied to detect circRNA expression in five CRC and paired normal tissues. Quantitative reverse-transcription polymerase chain reaction (qRT-PCR) was performed to measure circRNA expression, and the receiver operating characteristic curve was used to assess the diagnostic value of circRNA as a biomarker in 50 patients. A total of 1602 circRNAs were differentially expressed, including 743 upregulated and 859 downregulated circRNAs in CRC. CircST7L (hsa_circ_0110464) has a high diagnostic value for CRC. The expression of circST7L was closely associated with tumor size (P=0.024), grade (P=0.017), depth of invasion (P=0.034) and lymph node metastasis (P=0.001). In addition, prediction of circRNA-miRNA interactions identified miR-6821-5p, miR-1908-3p, and miR-6748-5p as pivotal targets of differentially expressed circRNAs. Finally, we predicted 7 miRNAs that may bind to circST7L and 13 target genes for these miRNAs. This study demonstrated that circRNAs were differentially expressed between CRC and normal tissues, and suggested that circST7L might be a promising diagnostic biomarker for CRC.

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