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Anticancer Efficacy of Photodynamic Therapy with Lung Cancer-Targeted Nanoparticles
Published on: December 1, 2016
Hypoxia-activated nanomedicines for effective cancer therapy
Mengjiao Zhou1, Yuqi Xie1, Shujun Xu1
1Department of Pharmacology, School of Pharmacy, Nantong University, 226000, Nantong, Jiangsu, PR China.
Abstract:
Hypoxia, a common characteristic in solid tumors, is found in phenotypically aggressive cancers that display resistance to typical cancer interventions. Due to its important role in tumor progression, tumor hypoxia has been considered as a primary target for cancer diagnosis and treatment. An advantage of hypoxia-activated nanomedicines is that they are inactive in normoxic cells. In hypoxic tumor tissues and cells, these nanomedicines undergo reduction by activated enzymes (usually through 1 or 2 electron oxidoreductases) to produce cytotoxic substances. In this review, we will focus on approaches to design nanomedicines that take advantage of tumor hypoxia. These approaches include: i) inhibitors of hypoxia-associated signaling pathways; ii) prodrugs activated by hypoxia; iii) nanocarriers responsive to hypoxia, and iv) bacteria mediated hypoxia targeting therapy. These strategies have guided and will continue to guide nanoparticle design in the near future. These strategies have the potential to overcome tumor heterogeneity to improve the efficiency of radiotherapy, chemotherapy and diagnosis.
Insights
Hypoxia-activated nanomedicines offer a promising strategy for cancer treatment by remaining inactive in normal cells but becoming cytotoxic in the low-oxygen tumor microenvironment. This approach targets aggressive cancers resistant to conventional therapies.
Area of Science:
- Oncology
- Nanomedicine
- Biochemistry
Background:
- Tumor hypoxia is a hallmark of aggressive cancers, contributing to treatment resistance.
- Hypoxia plays a critical role in tumor progression, making it a key target for cancer therapies.
- Hypoxia-activated nanomedicines offer targeted drug delivery, remaining inactive in normoxic conditions.
Purpose of the Study:
- To review strategies for designing nanomedicines that leverage tumor hypoxia for cancer therapy.
- To explore novel approaches for enhancing the efficacy of cancer diagnosis and treatment.
Main Methods:
- Focus on nanomedicine design principles activated by tumor hypoxia.
- Review of four key strategies: hypoxia-signaling inhibitors, hypoxia-activated prodrugs, hypoxia-responsive nanocarriers, and bacteria-mediated therapy.
- Analysis of how these strategies overcome tumor heterogeneity.
Main Results:
- Hypoxia-activated nanomedicines are selectively reduced by enzymes in hypoxic tumor cells to release cytotoxic agents.
- The reviewed strategies demonstrate potential for improved cancer treatment outcomes.
- These approaches can enhance the effectiveness of radiotherapy, chemotherapy, and diagnostic methods.
Conclusions:
- Nanomedicines designed to be activated by tumor hypoxia represent a significant advancement in targeted cancer therapy.
- These strategies hold promise for overcoming challenges posed by tumor heterogeneity and treatment resistance.
- Further development in nanoparticle design guided by hypoxia-targeting principles is expected to improve therapeutic efficiency.
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