Ontology highlight
ABSTRACT:
PROVIDER: PRJNA777419 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR16771800_1.fastq.gz | Fastqsanger.gz | |||
| SRR16771800_2.fastq.gz | Fastqsanger.gz | |||
| SRR16771801_1.fastq.gz | Fastqsanger.gz | |||
| SRR16771801_2.fastq.gz | Fastqsanger.gz | |||
| SRR16771802_1.fastq.gz | Fastqsanger.gz |
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Project description:The cancer initiating cells (CICs) act as a tumor initiation source. Recent studies have shown that CICs contribute to chemoresistance and radioresistance. The aims of this study were to investigate the relationship of CD133+ liver CICs and radiation resistance and to define a possible mechanism for radioresistance in hepatocellular carcinoma (HCC). Total RNA is obtained from CD133 positive cells and CD133 negative cells at 0, 12 and 24 hours after radiation exposure.
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Project description:Objective:Biomarkers of radiation injury are needed in planning therapeutic measures for cancer patients receiving radiation therapy and civilians exposed to nuclear events. Previous research has highlighted the impact of radiation damage, with cancer patients developing acute disorders including radiation induced pneumonitis or chronic disorders including pulmonary fibrosis months after radiation therapy ends. Discovery of biomarkers that predict these injuries will offer the potential to treat people proactively to mitigate this damage and improve quality of life. Recent research has highlighted the potential for messenger RNA (mRNA), microRNA (miRNA), and long non-coding RNA (lncRNA) to be used as radiation biomarkers. Our study focused on the changes in these RNAs at 48h after radiation exposure of mouse lung tissue to define biological pathway changes and determine potential biomarkers. Result: We observed sustained dysregulation of specific mRNAs, lncRNAs, and miRNAs across all doses. We observed gene dysregulation which can be used to develop both markers to identify no-exposure vs radiation exposure including Hba and Hbb mRNA which were dysregulated even at 1 Gy. We also observed genes which can indicate high dose exposure including Cpt1c and Pdk4. Gdf15, and Eda2r, mRNA markers of senescence and fibrosis, were the most significantly upregulated. Only three miRNAs were significantly dysregulated across all radiation doses, with miRNA-142-3p and miRNA-142-5p downregulated and miRNA-34a-5p upregulated. IPA analysis indicated that numerous pathways relevant to immune function, cell proliferation and survival decreased with increasing doses of radiation. This data highlighted early pathways of dysregulation depending on dose of exposure. This data will help with development of treatments and in medical decision-making. Further experiments are planned to develop medical countermeasures based on this early dysregulation.
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