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A Smart Nanoprobe for Visually Investigating the Activation Effect of Cyclical DOX Release on the p53 Pathway and
Ping Sun1, Chunlei Gao1, Zhe Chen1
1School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Abstract:
Developing appropriate methods for real-time in situ investigation of how drugs influence signaling pathways and related biomolecules holds enormous potential for helping to provide an understanding of how anticancer drugs exert their effects. Herein, we report a smart nanoprobe, PDA-MB (DOX)-Pep, constructed on the basis of polydopamine nanoparticles (PDA NPs) modified with a dense shell of molecular beacon (MB) with embedded doxorubicin (DOX) and peptide, which can respond specifically to miRNA-34a and Caspase-3 targets. Intracellular experiments demonstrated that, in comparison to the control nanoprobe PDA-MB-Pep, the smart nanoprobe could selectively respond to miRNA-34a, facilitating the release of the embedded DOX. The released DOX subsequently activated the p53 pathway, which further upregulated miRNA-34a expression, leading to additional DOX release. This initiated a cyclical process involving the probe's response to miRNA-34a, DOX release, p53 activation, and miRNA-34a upregulation, ultimately enhancing cell apoptosis and increasing Caspase-3 expression. The designed smart nanoprobe offers a visual approach to explore how anticancer drugs influence signaling pathways and related molecules at the cellular level.
Insights
Researchers developed a smart nanoprobe that visualizes anticancer drug effects in real-time. This probe tracks drug release, pathway activation, and cell death, enhancing understanding of cancer drug mechanisms.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Cancer Research
Background:
- Understanding anticancer drug mechanisms requires real-time in situ investigation methods.
- Signaling pathways and biomolecules are key targets for anticancer drug action.
Purpose of the Study:
- To develop a smart nanoprobe for real-time investigation of drug effects on signaling pathways.
- To visualize the interaction between anticancer drugs, cellular targets, and biological responses.
Main Methods:
- Construction of a polydopamine nanoparticle (PDA NP)-based nanoprobe (PDA-MB (DOX)-Pep) with molecular beacon (MB), doxorubicin (DOX), and peptide.
- Intracellular experiments to assess the nanoprobe's response to miRNA-34a and Caspase-3.
- Monitoring of drug release, pathway activation (p53), and downstream effects on miRNA-34a and Caspase-3 expression.
Main Results:
- The smart nanoprobe selectively responded to miRNA-34a, triggering doxorubicin (DOX) release.
- Released DOX activated the p53 pathway, leading to increased miRNA-34a expression and further DOX release.
- A cyclical process of drug release and pathway activation was observed, enhancing cell apoptosis and Caspase-3 expression.
Conclusions:
- The developed smart nanoprobe provides a visual method for studying anticancer drug mechanisms at the cellular level.
- This approach facilitates a deeper understanding of how drugs interact with signaling pathways and biomolecules.
- The cyclical feedback loop enhances therapeutic efficacy by promoting apoptosis.
