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In Silico Identification and Characterization of circRNAs During Host-Pathogen Interactions
Published on: October 21, 2022
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Intergenic CircRNA Circ_0007379 Inhibits Colorectal Cancer Progression by Modulating miR-320a Biogenesis in a
Fei Long1,2, Liang Li1, Canbin Xie1
1Department of Gastrointestinal Surgery, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China.
International Journal of Biological Sciences
|August 11, 2023
Summary
Intergenic circular RNA (circRNA) circ_0007379 inhibits colorectal cancer (CRC) progression by promoting miR-320a maturation and repressing RUNX1. This study reveals a novel circRNA function in suppressing CRC development.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- Circular RNAs (circRNAs) are crucial in tumorigenesis, but intergenic circRNAs in human cancer remain understudied.
- Colorectal cancer (CRC) progression involves complex genetic and epigenetic alterations.
- Understanding novel regulatory mechanisms in CRC is vital for therapeutic advancements.
Purpose of the Study:
- To investigate the role of intergenic circRNAs in colorectal cancer.
- To identify and characterize a novel circRNA, circ_0007379, in CRC.
- To elucidate the functional and mechanistic basis of circ_0007379 in CRC suppression.
Main Methods:
- CircRNA microarray analysis to identify differentially expressed circRNAs in CRC.
- Cell culture, organoid, and xenograft models to assess the functional impact of circ_0007379.
- Mechanistic studies involving RNA processing, miRNA maturation, and gene expression analysis.
Main Results:
- Circ_0007379 was significantly downregulated in colorectal cancer patients.
- Circ_0007379 suppressed CRC cell growth and metastasis in vitro and in vivo.
- Circ_0007379 facilitates miR-320a maturation by processing pri-miR-320a and pre-miR-320a, subsequently repressing RUNX1.
Conclusions:
- Intergenic circRNA circ_0007379 acts as a tumor suppressor in colorectal cancer.
- Circ_0007379's mechanism involves promoting miR-320a maturation and inhibiting RUNX1.
- This finding highlights a novel circRNA-mediated pathway for inhibiting CRC progression.
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