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Han J, Yang W, Li Y, Li J, Jiang F, Xie J, Huang X. Combining Doxorubicin-Conjugated Polymeric Nanoparticles and 5-Aminolevulinic Acid for Enhancing Radiotherapy against Lung Cancer. Bioconjug Chem 2022; 33:654-665. [PMID: 35385661 DOI: 10.1021/acs.bioconjchem.2c00066] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Radiation therapy (RT) concurrent with chemotherapy improves local lung cancer control but may cause systemic toxicity. There is an unmet clinical need of treatments that can selectively sensitize cancer cells to RT. Herein, we explored a radiosensitizing strategy that combines doxorubicin (DOX)-encapsulated polyaspartamide nanoparticles and 5-aminolevulinic acid (5-ALA). The DOX-polyaspartamide nanoparticles were coupled with NTSmut, a ligand specific to neurotensin receptor type 1 (NTSR1), for lung cancer targeting. DOX was coupled to the polymer backbone through a pH-sensitive hydrazone linker, which allows for controlled release of the drug in an acidic tumor micromovement. Meanwhile, 5-ALA accumulates in the cancer cell's mitochondria, forming protoporphyrin (PpIX) that amplifies RT-induced oxidative stress. When tested in vitro in H1299 cells, DOX-encapsulated nanoparticles in conjugation with 5-ALA enhanced cancer cell killing owing to the complementary radiosensitizing effects of DOX and 5-ALA. In vivo studies confirmed that the combination improved tumor suppression relative to RT alone without causing toxicity to normal tissues. Overall, our study suggests an effective and selective radiosensitizing approach.
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Affiliation(s)
- Jinghua Han
- College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300353, China
| | - Wei Yang
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Yuanke Li
- State Key Laboratory of Medicinal Chemical Biology, and Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Jianwen Li
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Fangchao Jiang
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Jin Xie
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Xinglu Huang
- State Key Laboratory of Medicinal Chemical Biology, and Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
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Stimuli-Responsive Poly(aspartamide) Derivatives and Their Applications as Drug Carriers. Int J Mol Sci 2021; 22:ijms22168817. [PMID: 34445521 PMCID: PMC8396293 DOI: 10.3390/ijms22168817] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 01/16/2023] Open
Abstract
Poly(aspartamide) derivatives, one kind of amino acid-based polymers with excellent biocompatibility and biodegradability, meet the key requirements for application in various areas of biomedicine. Poly(aspartamide) derivatives with stimuli-responsiveness can usually respond to external stimuli to change their chemical or physical properties. Using external stimuli such as temperature and pH as switches, these smart poly(aspartamide) derivatives can be used for convenient drug loading and controlled release. Here, we review the synthesis strategies for preparing these stimuli-responsive poly(aspartamide) derivatives and the latest developments in their applications as drug carriers.
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Zhang G, Bao C, Yi H. Investigation of the temperature responsive behaviors of novel polyaspartamide derivatives bearing alkyl ether-type pendants. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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