Tumor Acidity-Sensitive Polymeric Vector for Active Targeted siRNA Delivery
Although surface PEGylation of siRNA vectors is effective for preventing protein adsorption and thereby helps these vectors to evade the reticuloendothelial system (RES) in vivo, it also suppresses the cellular uptake of these vectors by target cells. This dilemma could be overcome by employing stim...
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| Published in | Journal of the American Chemical Society Vol. 137; no. 48; pp. 15217 - 15224 |
|---|---|
| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
American Chemical Society
09.12.2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0002-7863 1520-5126 1520-5126 |
| DOI | 10.1021/jacs.5b09602 |
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| Abstract | Although surface PEGylation of siRNA vectors is effective for preventing protein adsorption and thereby helps these vectors to evade the reticuloendothelial system (RES) in vivo, it also suppresses the cellular uptake of these vectors by target cells. This dilemma could be overcome by employing stimuli-responsive shell-detachable nanovectors to achieve enhanced cellular internalization while maintaining prolonged blood circulation. Among the possible stimuli, dysregulated pH in tumor (pHe) is the most universal and practical. However, the design of pHe-sensitive system is problematic because of the subtle differences between the pHe and pH in other tissues. Here, a simple acid-sensitive bridged copolymer is developed and used for tumor-targeted systemic delivery of siRNA. After forming the micelleplex delivery system, the corresponding nanoparticles (Dm-NP) might undergo several modifications as follows: (i) a poly(ethylene glycol) (PEG) corona, which is stable in the circulatory system and protects nanovectors from RES clearance; (ii) a pHe responsive linkage breakage, which induces PEG detachment at tumor sites and thereby facilitates cell targeting; and (iii) a cell-penetration peptide, which is exposed upon the removal of PEG and further enhances cellular uptake. Thus, Dm-NP achieved both prolonged circulation and effective accumulation in tumor cells and resulted in the safe and enhanced inhibition of non-small cell lung cancer growth. |
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| AbstractList | Although surface PEGylation of siRNA vectors is effective for preventing protein adsorption and thereby helps these vectors to evade the reticuloendothelial system (RES) in vivo, it also suppresses the cellular uptake of these vectors by target cells. This dilemma could be overcome by employing stimuli-responsive shell-detachable nanovectors to achieve enhanced cellular internalization while maintaining prolonged blood circulation. Among the possible stimuli, dysregulated pH in tumor (pHₑ) is the most universal and practical. However, the design of pHₑ-sensitive system is problematic because of the subtle differences between the pHₑ and pH in other tissues. Here, a simple acid-sensitive bridged copolymer is developed and used for tumor-targeted systemic delivery of siRNA. After forming the micelleplex delivery system, the corresponding nanoparticles (Dₘ-NP) might undergo several modifications as follows: (i) a poly(ethylene glycol) (PEG) corona, which is stable in the circulatory system and protects nanovectors from RES clearance; (ii) a pHₑ responsive linkage breakage, which induces PEG detachment at tumor sites and thereby facilitates cell targeting; and (iii) a cell-penetration peptide, which is exposed upon the removal of PEG and further enhances cellular uptake. Thus, Dₘ-NP achieved both prolonged circulation and effective accumulation in tumor cells and resulted in the safe and enhanced inhibition of non-small cell lung cancer growth. Although surface PEGylation of siRNA vectors is effective for preventing protein adsorption and thereby helps these vectors to evade the reticuloendothelial system (RES) in vivo, it also suppresses the cellular uptake of these vectors by target cells. This dilemma could be overcome by employing stimuli-responsive shell-detachable nanovectors to achieve enhanced cellular internalization while maintaining prolonged blood circulation. Among the possible stimuli, dysregulated pH in tumor (pHe) is the most universal and practical. However, the design of pHe-sensitive system is problematic because of the subtle differences between the pHe and pH in other tissues. Here, a simple acid-sensitive bridged copolymer is developed and used for tumor-targeted systemic delivery of siRNA. After forming the micelleplex delivery system, the corresponding nanoparticles (Dm-NP) might undergo several modifications as follows: (i) a poly(ethylene glycol) (PEG) corona, which is stable in the circulatory system and protects nanovectors from RES clearance; (ii) a pHe responsive linkage breakage, which induces PEG detachment at tumor sites and thereby facilitates cell targeting; and (iii) a cell-penetration peptide, which is exposed upon the removal of PEG and further enhances cellular uptake. Thus, Dm-NP achieved both prolonged circulation and effective accumulation in tumor cells and resulted in the safe and enhanced inhibition of non-small cell lung cancer growth. Although surface PEGylation of siRNA vectors is effective for preventing protein adsorption and thereby helps these vectors to evade the reticuloendothelial system (RES) in vivo, it also suppresses the cellular uptake of these vectors by target cells. This dilemma could be overcome by employing stimuli-responsive shell-detachable nanovectors to achieve enhanced cellular internalization while maintaining prolonged blood circulation. Among the possible stimuli, dysregulated pH in tumor (pHe) is the most universal and practical. However, the design of pHe-sensitive system is problematic because of the subtle differences between the pHe and pH in other tissues. Here, a simple acid-sensitive bridged copolymer is developed and used for tumor-targeted systemic delivery of siRNA. After forming the micelleplex delivery system, the corresponding nanoparticles (Dm-NP) might undergo several modifications as follows: (i) a poly(ethylene glycol) (PEG) corona, which is stable in the circulatory system and protects nanovectors from RES clearance; (ii) a pHe responsive linkage breakage, which induces PEG detachment at tumor sites and thereby facilitates cell targeting; and (iii) a cell-penetration peptide, which is exposed upon the removal of PEG and further enhances cellular uptake. Thus, Dm-NP achieved both prolonged circulation and effective accumulation in tumor cells and resulted in the safe and enhanced inhibition of non-small cell lung cancer growth. Although surface PEGylation of siRNA vectors is effective for preventing protein adsorption and thereby helps these vectors to evade the reticuloendothelial system (RES) in vivo, it also suppresses the cellular uptake of these vectors by target cells. This dilemma could be overcome by employing stimuli-responsive shell-detachable nanovectors to achieve enhanced cellular internalization while maintaining prolonged blood circulation. Among the possible stimuli, dysregulated pH in tumor (pHe) is the most universal and practical. However, the design of pHe-sensitive system is problematic because of the subtle differences between the pHe and pH in other tissues. Here, a simple acid-sensitive bridged copolymer is developed and used for tumor-targeted systemic delivery of siRNA. After forming the micelleplex delivery system, the corresponding nanoparticles (Dm-NP) might undergo several modifications as follows: (i) a poly(ethylene glycol) (PEG) corona, which is stable in the circulatory system and protects nanovectors from RES clearance; (ii) a pHe responsive linkage breakage, which induces PEG detachment at tumor sites and thereby facilitates cell targeting; and (iii) a cell-penetration peptide, which is exposed upon the removal of PEG and further enhances cellular uptake. Thus, Dm-NP achieved both prolonged circulation and effective accumulation in tumor cells and resulted in the safe and enhanced inhibition of non-small cell lung cancer growth.Although surface PEGylation of siRNA vectors is effective for preventing protein adsorption and thereby helps these vectors to evade the reticuloendothelial system (RES) in vivo, it also suppresses the cellular uptake of these vectors by target cells. This dilemma could be overcome by employing stimuli-responsive shell-detachable nanovectors to achieve enhanced cellular internalization while maintaining prolonged blood circulation. Among the possible stimuli, dysregulated pH in tumor (pHe) is the most universal and practical. However, the design of pHe-sensitive system is problematic because of the subtle differences between the pHe and pH in other tissues. Here, a simple acid-sensitive bridged copolymer is developed and used for tumor-targeted systemic delivery of siRNA. After forming the micelleplex delivery system, the corresponding nanoparticles (Dm-NP) might undergo several modifications as follows: (i) a poly(ethylene glycol) (PEG) corona, which is stable in the circulatory system and protects nanovectors from RES clearance; (ii) a pHe responsive linkage breakage, which induces PEG detachment at tumor sites and thereby facilitates cell targeting; and (iii) a cell-penetration peptide, which is exposed upon the removal of PEG and further enhances cellular uptake. Thus, Dm-NP achieved both prolonged circulation and effective accumulation in tumor cells and resulted in the safe and enhanced inhibition of non-small cell lung cancer growth. |
| Author | Sun, Chun-Yang Li, Hong-Jun Cao, Zhi-Ting Xia, Jin-Xing Shen, Song Liu, Yang Yang, Xian-Zhu Wang, Jun Xu, Cong-Fei |
| AuthorAffiliation | University of Science and Technology of China The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center Innovation Center for Cell Signaling Network University of Science & Technology of China Hefei National Laboratory for Physical Sciences at Microscale |
| AuthorAffiliation_xml | – name: University of Science and Technology of China – name: Innovation Center for Cell Signaling Network – name: The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center – name: University of Science & Technology of China – name: Hefei National Laboratory for Physical Sciences at Microscale |
| Author_xml | – sequence: 1 givenname: Chun-Yang surname: Sun fullname: Sun, Chun-Yang – sequence: 2 givenname: Song surname: Shen fullname: Shen, Song – sequence: 3 givenname: Cong-Fei surname: Xu fullname: Xu, Cong-Fei – sequence: 4 givenname: Hong-Jun surname: Li fullname: Li, Hong-Jun – sequence: 5 givenname: Yang surname: Liu fullname: Liu, Yang – sequence: 6 givenname: Zhi-Ting surname: Cao fullname: Cao, Zhi-Ting – sequence: 7 givenname: Xian-Zhu surname: Yang fullname: Yang, Xian-Zhu – sequence: 8 givenname: Jin-Xing surname: Xia fullname: Xia, Jin-Xing – sequence: 9 givenname: Jun surname: Wang fullname: Wang, Jun email: jwang699@ustc.edu.cn |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/26571079$$D View this record in MEDLINE/PubMed |
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| Title | Tumor Acidity-Sensitive Polymeric Vector for Active Targeted siRNA Delivery |
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