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Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
Circular Single-Stranded DNA-Based Artificial Nanoviruses Mitigate Colorectal Cancer Development
Jinghao Wang1,2, Pengfei Zhang2, Yonglian Huang2
1Department of Chemistry, University of Science & Technology of China, Hefei, Anhui, 230026, China.
Abstract:
Colorectal cancer (CRC) remains a significant global health challenge, underscoring the need for innovative therapeutic strategies. Oncogenic miRNAs (oncomiRs) play a significant biological role in the initiation and progression of colorectal cancer. Inspired by the cooperative mechanisms of plant nanovirus, which employ multiple circular single-stranded DNA (CssDNA) genomes, it is hypothesized that the development and delivery of CssDNA to target oncomiRs would achieve therapeutic benefits in CRC. In this study, a multi-omics approach is utilized to identify key tumor suppressor genes (TSGs) and their related oncomiRs implicated in CRC, followed by the development of CssDNA, each of which is loaded with multiple miRNA binding sites targeting one oncomiR. When transfected into the cells, these CssDNA can effectively target and sequester the corresponding oncomiRs to restore the expression of TSGs, leading to a marked reduction in CRC development both in vitro and in vivo. The findings highlight the therapeutic potential of nanovirus-inspired CssDNA in modulating the miRNA-mediated regulatory network in CRC. This study lays the groundwork for the development of non-coding DNA-based therapies with broad implications for the treatment of colorectal cancer and potentially other malignancies.
Insights
Researchers developed novel circular single-stranded DNA (CssDNA) therapies inspired by plant viruses to target oncogenic microRNAs (oncomiRs) in colorectal cancer (CRC). This approach effectively restores tumor suppressor gene expression, reducing CRC progression in vitro and in vivo.
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- Colorectal cancer (CRC) presents a significant global health burden, necessitating advanced therapeutic interventions.
- Oncogenic microRNAs (oncomiRs) are critical drivers in the initiation and progression of CRC, representing key therapeutic targets.
Purpose of the Study:
- To investigate the therapeutic potential of circular single-stranded DNA (CssDNA) constructs, inspired by plant nanoviruses, for targeting oncomiRs in CRC.
- To develop and validate CssDNA molecules designed to sequester specific oncomiRs, thereby restoring tumor suppressor gene (TSG) expression and inhibiting CRC.
Main Methods:
- A multi-omics strategy was employed to identify crucial TSGs and their associated oncomiRs in CRC.
- Engineered CssDNA molecules were designed, each incorporating multiple binding sites to target specific oncomiRs.
- In vitro and in vivo experiments were conducted to assess the efficacy of CssDNA transfection in CRC cells and animal models.
Main Results:
- The developed CssDNA effectively targeted and sequestered specific oncomiRs within CRC cells.
- Restoration of TSG expression was observed following CssDNA treatment.
- Significant reduction in CRC development was demonstrated both in vitro and in vivo.
Conclusions:
- Nanovirus-inspired CssDNA represents a promising therapeutic strategy for modulating miRNA-mediated regulatory networks in colorectal cancer.
- This study establishes a foundation for novel non-coding DNA-based therapies for CRC and potentially other cancers.
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