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Yan Y, Zhang G, Wu C, Ren Q, Liu X, Huang F, Cao Y, Ye W. Structural Exploration of Polycationic Nanoparticles for siRNA Delivery. ACS Biomater Sci Eng 2022; 8:1964-1974. [PMID: 35380797 DOI: 10.1021/acsbiomaterials.2c00196] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
RNA interference (RNAi) is a promising approach to the treatment of genetic diseases by the specific knockdown of target genes. Functional polymers are potential vehicles for the effective delivery of vulnerable small interfering RNA (siRNA), which is required for the broad application of RNAi-based therapeutics. The development of methods for the facile modulation of chemical structures of polymeric carriers and an elucidation of detailed delivery mechanisms remain important areas of research. In this paper, we synthesized a series of methacrylate-based polymers with controllable structures and narrow distributions by atom transfer radical polymerization using various combinations of cationic monomers (2-dimethylaminoethyl methacrylate, 2-diethylaminoethyl methacrylate, and 2-dibutylaminoethyl methacrylate) and hydrophobic monomers (2-butyl methacrylate (BMA), cyclohexyl methacrylate, and 2-ethylhexyl methacrylate). These polymers exhibited varying hydrophobicities, charge densities, and pKa values, enabling the discovery of effective carriers for siRNA by in vitro delivery assays. For the polymers with BMA segments, 50% of cationic segments were beneficial to the formation of siRNA nanoparticles (NPs) and the in vitro delivery of siRNA. The optimal ratio varied for different combinations of cationic and hydrophobic segments. In particular, 20k PMB 0.5, PME 0.5, and PEB 1.0 showed >75% luciferase knockdown. Efficacious delivery was dependent on high siRNA binding, the small size of NPs, and balanced hydrophobicity and charge density. Cellular uptake and endosomal escape experiments indicated that carboxybetaine modification of 20k PMB 0.5 did not remarkably affect the internalization of corresponding NPs after incubation for 6 h but significantly reduced the endosomal escape of NPs, which leads to the notable decrease in delivery efficacy of polymers. These results provide insights into the mechanism of polymer-based siRNA delivery and may inspire the development of novel polymeric carriers.
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Affiliation(s)
- Yunfeng Yan
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Guangliang Zhang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Chengfan Wu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Qidi Ren
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Xiaomin Liu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Fangqian Huang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Yi Cao
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Wenbo Ye
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
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2
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Wofford KL, Shultz RB, Burrell JC, Cullen DK. Neuroimmune interactions and immunoengineering strategies in peripheral nerve repair. Prog Neurobiol 2022; 208:102172. [PMID: 34492307 PMCID: PMC8712351 DOI: 10.1016/j.pneurobio.2021.102172] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 08/11/2021] [Accepted: 09/02/2021] [Indexed: 01/03/2023]
Abstract
Peripheral nerve injuries result in disrupted cellular communication between the central nervous system and somatic distal end targets. The peripheral nervous system is capable of independent and extensive regeneration; however, meaningful target muscle reinnervation and functional recovery remain limited and may result in chronic neuropathic pain and diminished quality of life. Macrophages, the primary innate immune cells of the body, are critical contributors to regeneration of the injured peripheral nervous system. However, in some clinical scenarios, macrophages may fail to provide adequate support with optimal timing, duration, and location. Here, we review the history of immunosuppressive and immunomodulatory strategies to treat nerve injuries. Thereafter, we enumerate the ways in which macrophages contribute to successful nerve regeneration. We argue that implementing macrophage-based immunomodulatory therapies is a promising treatment strategy for nerve injuries across a wide range of clinical presentations.
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Affiliation(s)
- Kathryn L Wofford
- Center for Brain Injury & Repair, Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA, 19104, United States; Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz VA Medical Center, Philadelphia, PA, 19104, United States
| | - Robert B Shultz
- Center for Brain Injury & Repair, Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA, 19104, United States; Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz VA Medical Center, Philadelphia, PA, 19104, United States; Axonova Medical, LLC, Philadelphia, PA, 19104, United States
| | - Justin C Burrell
- Center for Brain Injury & Repair, Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA, 19104, United States; Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz VA Medical Center, Philadelphia, PA, 19104, United States; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, 19104, United States
| | - D Kacy Cullen
- Center for Brain Injury & Repair, Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA, 19104, United States; Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz VA Medical Center, Philadelphia, PA, 19104, United States; Axonova Medical, LLC, Philadelphia, PA, 19104, United States; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, 19104, United States.
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3
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Peters JT, Wechsler ME, Peppas NA. Advanced biomedical hydrogels: molecular architecture and its impact on medical applications. Regen Biomater 2021; 8:rbab060. [PMID: 34925879 PMCID: PMC8678442 DOI: 10.1093/rb/rbab060] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 09/22/2021] [Accepted: 10/18/2021] [Indexed: 12/13/2022] Open
Abstract
Hydrogels are cross-linked polymeric networks swollen in water, physiological aqueous solutions or biological fluids. They are synthesized by a wide range of polymerization methods that allow for the introduction of linear and branched units with specific molecular characteristics. In addition, they can be tuned to exhibit desirable chemical characteristics including hydrophilicity or hydrophobicity. The synthesized hydrogels can be anionic, cationic, or amphiphilic and can contain multifunctional cross-links, junctions or tie points. Beyond these characteristics, hydrogels exhibit compatibility with biological systems, and can be synthesized to render systems that swell or collapse in response to external stimuli. This versatility and compatibility have led to better understanding of how the hydrogel's molecular architecture will affect their physicochemical, mechanical and biological properties. We present a critical summary of the main methods to synthesize hydrogels, which define their architecture, and advanced structural characteristics for macromolecular/biological applications.
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Affiliation(s)
- Jonathan T Peters
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, 200 E. Dean Keeton, Austin, TX 78712, USA
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W. Dean Keeton, Austin, TX 78712, USA
| | - Marissa E Wechsler
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Nicholas A Peppas
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, 200 E. Dean Keeton, Austin, TX 78712, USA
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W. Dean Keeton, Austin, TX 78712, USA
- Department of Biomedical Engineering, The University of Texas at Austin, 107 W. Dean Keeton, Austin, TX 78712, USA
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, 107 W. Dean Keeton, Austin, TX 78712, USA
- Department of Surgery and Perioperative Care, and Department of Pediatrics, Dell Medical School, The University of Texas at Austin, 1601 Trinity St., Bldg. B, Austin, TX 78712, USA
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4
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Host miRNA and immune cell interactions: relevance in nano-therapeutics for human health. Immunol Res 2021; 70:1-18. [PMID: 34716546 DOI: 10.1007/s12026-021-09247-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 10/11/2021] [Indexed: 12/15/2022]
Abstract
Around 2200 miRNA (microRNA) genes were found in the human genome. miRNAs are arranged in clusters within the genome and share the same transcriptional regulatory units. It has been revealed that approximately 50% of miRNAs elucidated in the genome are transcribed from non-protein-coding genes, and the leftover miRNAs are present in the introns of coding sequences. We are now approaching a stage in which miRNA diagnostics and therapies can be established confidently, and several commercial efforts are underway to carry these innovations from the bench to the clinic. MiRNAs control many of the significant cellular activities such as production, differentiation, growth, and metabolism. Particularly in the immune system, miRNAs have emerged as a crucial biological component during diseased state and homeostasis. miRNAs have been found to regulate inflammatory responses and autoimmune disorders. Moreover, each miRNA targets multiple genes simultaneously, making miRNAs promising tools as diagnostic biomarkers and as remedial targets. Still, one of the major obstacles in miRNA-based approaches is the achievement of specific and efficient systemic delivery of miRNAs. To overcome these challenges, nanoformulations have been synthesized to protect miRNAs from degradation and enhance cellular uptake. The current review deals with the miRNA-mediated regulation of the recruitment and activation of immune cells, especially in the tumor microenvironment, viral infection, inflammation, and autoimmunity. The nano-based miRNA delivery modes are also discussed here, especially in the context of immune modulation.
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5
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Spencer DS, Shodeinde AB, Beckman DW, Luu BC, Hodges HR, Peppas NA. Cytocompatibility, membrane disruption, and siRNA delivery using environmentally responsive cationic nanogels. J Control Release 2021; 332:608-619. [PMID: 33675879 PMCID: PMC8089052 DOI: 10.1016/j.jconrel.2021.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 11/17/2022]
Abstract
Advances in the formulation of nucleic acid-based therapeutics have rendered them a promising avenue for treating diverse ailments. Nonetheless, clinical translation of these therapies is hindered by a lack of strategies to ensure the delivery of these nucleic acids in a safe, efficacious manner with the required spatial and temporal control. To this aim, environmentally responsive hydrogels are of interest due to their ability to provide the desired characteristics of a protective carrier for siRNA delivery. Previous work in our laboratory has demonstrated the ability to synthesize nanoparticle formulations with targeted pKa, swelling, and surface PEG density. Here, a library of nanoparticle formulations was assessed on their in vitro toxicity, hemolytic capacity, siRNA loading, and gene-silencing efficacy. Successful candidates exhibited the lowest degrees of cytotoxicity, pH-dependent membrane disruption potential, the highest siRNA loading, and the highest transfection efficacies.
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Affiliation(s)
- David S Spencer
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX 78712, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX 78712, USA
| | - Aaliyah B Shodeinde
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX 78712, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX 78712, USA
| | - David W Beckman
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX 78712, USA
| | - Bryan C Luu
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX 78712, USA
| | - Hannah R Hodges
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX 78712, USA
| | - Nicholas A Peppas
- McKetta Department of Chemical Engineering, 200 E. Dean Keeton St. Stop C0400, Austin, TX 78712, USA; Department of Biomedical Engineering, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX 78712, USA; Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, 2409 University Ave. Stop A1900, Austin, TX 78712, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, 107 W Dean Keeton Street Stop C0800, Austin, TX 78712, USA; Departments of Pediatrics, Surgery, and Perioperative Care, Dell Medical School, 1601 Trinity St., Bldg. B, Stop Z0800, Austin, TX 78712, USA.
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6
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Kapadia CH, Luo B, Dang MN, Irvin-Choy N, Valcourt DM, Day ES. Polymer nanocarriers for MicroRNA delivery. J Appl Polym Sci 2020; 137:48651. [PMID: 33384460 PMCID: PMC7773200 DOI: 10.1002/app.48651] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 10/01/2019] [Indexed: 12/30/2022]
Abstract
Abnormal expression of microRNAs (miRNAs), which are highlyconserved noncoding RNAs that regulate the expression of various genes post transcriptionally to control cellular functions, has been associated with the development of many diseases. In some cases, disease-promoting miRNAs are upregulated, while in other instances disease-suppressive miRNAs are downregulated. To alleviate this imbalanced miRNA expression, either antagomiRs or miRNA mimics can be delivered to cells to inhibit or promote miRNA expression, respectively. Unfortunately, the clinical translation of bare antagomiRs and miRNA mimics has been challenging because nucleic acids are susceptible to nuclease degradation, display unfavorable pharmacokinetics, and cannot passively enter cells. This review emphasizes the challenges associated with miRNA mimic delivery and then discusses the design and implementation of polymer nanocarriers to overcome these challenges. Preclinical efforts are summarized, and a forward-looking perspective on the future clinical translation of polymer nanomaterials as miRNA delivery vehicles is provided.
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Affiliation(s)
- Chintan H Kapadia
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716
| | - Benjamin Luo
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716
| | - Megan N Dang
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716
| | - N'Dea Irvin-Choy
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716
| | - Danielle M Valcourt
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716
| | - Emily S Day
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716
- Helen F. Graham Cancer Center and Research Institute, Newark, Delaware 19713
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7
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Gu J, Clegg JR, Heersema LA, Peppas NA, Smyth HDC. Optimization of Cationic Nanogel PEGylation to Achieve Mammalian Cytocompatibility with Limited Loss of Gram-Negative Bactericidal Activity. Biomacromolecules 2020; 21:1528-1538. [PMID: 32207917 DOI: 10.1021/acs.biomac.0c00081] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Tuning the composition of antimicrobial nanogels can significantly alter both nanogel cytotoxicity and antibacterial activity. This project investigated the extent to which PEGylation of cationic, hydrophobic nanogels altered their cytotoxicity and bactericidal activity. These biodegradable, cationic nanogels were synthesized by activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) emulsion polymerization with up to 13.9 wt % PEG (MW = 2000) MA, as verified by 1H NMR. Nanogel bactericidal activity was assessed against Gram-negative E. coli and P. aeruginosa and Gram-positive S. mutans and S. aureus by measuring membrane lysis with a LIVE/DEAD assay. E. coli and S. mutans viability was further validated by measuring metabolic activity with a PrestoBlue assay and imaging bacteria stained with a LIVE/DEAD probe. All tested nanogels decreased the membrane integrity (0.5 mg/mL dose) for Gram-negative E. coli and P. aeruginosa, irrespective of the extent of PEGylation. PEGylation (13.9 wt %) increased the cytocompatibility of cationic nanogels toward RAW 264.7 murine macrophages and L929 murine fibroblasts by over 100-fold, relative to control nanogels. PEGylation (42.8 wt %) reduced nanogel uptake by 43% for macrophages and 63% for fibroblasts. Therefore, PEGylation reduced nanogel toxicity to mammalian cells without significantly compromising their bactericidal activity. These results facilitate future nanogel design for perturbing the growth of Gram-negative bacteria.
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Affiliation(s)
| | | | | | - Nicholas A Peppas
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine University of Texas, Austin, Texas 78705, United States
| | - Hugh D C Smyth
- The LaMontagne Center for Infectious Disease, Austin, Texas 78712, United States
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8
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Liechty WB, Scheuerle RL, Vela Ramirez JE, Peppas NA. Cytoplasmic delivery of functional siRNA using pH-Responsive nanoscale hydrogels. Int J Pharm 2019; 562:249-257. [PMID: 30858114 DOI: 10.1016/j.ijpharm.2019.03.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 03/04/2019] [Accepted: 03/06/2019] [Indexed: 02/06/2023]
Abstract
The progress of short interfering RNA (siRNA) technologies has unlocked the development of novel alternatives for the treatment of a myriad of diseases, including viral infections, autoimmune disorders, or cancer. Nevertheless, the clinical use of these therapies faces significant challenges, mainly overcoming the charged and large nature of these molecules to effectively enter the cell. In this work, we developed a cationic polymer nanoparticle system that is able to load siRNA due to electrostatic interactions. The pH-responsiveness and membrane-disrupting ability of these carriers make them suitable intracellular delivery vehicles. In the work presented herein we synthesized, characterized, and evaluated the properties of nanoparticles based on 2-diethylaminoethyl methacrylate and tert-butyl methacrylate copolymers. A disulfide crosslinker was incorporated in the nanogels to enable the degradation of the nanoparticles in reductive environments, showing no significant changes on their physicochemical properties. The capability of the developed nanogels to be internalized, deliver siRNA, and induce gene knockdown were demonstrated using a human epithelial colorectal adenocarcinoma cell line. Overall, these findings suggest that this platform exhibits desirable characteristics as a potential siRNA-delivery platform.
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Affiliation(s)
- William B Liechty
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Rebekah L Scheuerle
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Julia E Vela Ramirez
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Nicholas A Peppas
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA; Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, USA; Department of Surgery and Perioperative Care, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA; Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA.
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Ho DK, Frisch S, Biehl A, Terriac E, De Rossi C, Schwarzkopf K, Lautenschläger F, Loretz B, Murgia X, Lehr CM. Farnesylated Glycol Chitosan as a Platform for Drug Delivery: Synthesis, Characterization, and Investigation of Mucus–Particle Interactions. Biomacromolecules 2018; 19:3489-3501. [DOI: 10.1021/acs.biomac.8b00795] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Duy-Khiet Ho
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), ‡Department of Pharmacy, §INM−Leibniz Institute for New Materials, and ⊥Korea Institute of Science and Technology, KIST Europe, Saarland University, D-66123 Saarbrücken, Germany
| | - Sarah Frisch
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), ‡Department of Pharmacy, §INM−Leibniz Institute for New Materials, and ⊥Korea Institute of Science and Technology, KIST Europe, Saarland University, D-66123 Saarbrücken, Germany
| | - Alexander Biehl
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), ‡Department of Pharmacy, §INM−Leibniz Institute for New Materials, and ⊥Korea Institute of Science and Technology, KIST Europe, Saarland University, D-66123 Saarbrücken, Germany
| | | | - Chiara De Rossi
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), ‡Department of Pharmacy, §INM−Leibniz Institute for New Materials, and ⊥Korea Institute of Science and Technology, KIST Europe, Saarland University, D-66123 Saarbrücken, Germany
| | - Konrad Schwarzkopf
- Department of Anesthesia and Intensive Care, Klinikum Saarbrücken, 66119 Saarbrücken, Germany
| | | | - Brigitta Loretz
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), ‡Department of Pharmacy, §INM−Leibniz Institute for New Materials, and ⊥Korea Institute of Science and Technology, KIST Europe, Saarland University, D-66123 Saarbrücken, Germany
| | - Xabier Murgia
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), ‡Department of Pharmacy, §INM−Leibniz Institute for New Materials, and ⊥Korea Institute of Science and Technology, KIST Europe, Saarland University, D-66123 Saarbrücken, Germany
| | - Claus-Michael Lehr
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), ‡Department of Pharmacy, §INM−Leibniz Institute for New Materials, and ⊥Korea Institute of Science and Technology, KIST Europe, Saarland University, D-66123 Saarbrücken, Germany
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Fenton OS, Olafson KN, Pillai PS, Mitchell MJ, Langer R. Advances in Biomaterials for Drug Delivery. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1705328. [PMID: 29736981 PMCID: PMC6261797 DOI: 10.1002/adma.201705328] [Citation(s) in RCA: 444] [Impact Index Per Article: 74.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 02/12/2018] [Indexed: 04/14/2023]
Abstract
Advances in biomaterials for drug delivery are enabling significant progress in biology and medicine. Multidisciplinary collaborations between physical scientists, engineers, biologists, and clinicians generate innovative strategies and materials to treat a range of diseases. Specifically, recent advances include major breakthroughs in materials for cancer immunotherapy, autoimmune diseases, and genome editing. Here, strategies for the design and implementation of biomaterials for drug delivery are reviewed. A brief history of the biomaterials field is first established, and then commentary on RNA delivery, responsive materials development, and immunomodulation are provided. Current challenges associated with these areas as well as opportunities to address long-standing problems in biology and medicine are discussed throughout.
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Affiliation(s)
- Owen S Fenton
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
| | - Katy N Olafson
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
| | - Padmini S Pillai
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
| | - Michael J Mitchell
- Department of Bioengineering, University of Pennsylvania, School of Engineering and Applied Science, Philadelphia, PA, 19104, USA
| | - Robert Langer
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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11
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Ho DK, Costa A, De Rossi C, de Souza Carvalho-Wodarz C, Loretz B, Lehr CM. Polysaccharide Submicrocarrier for Improved Pulmonary Delivery of Poorly Soluble Anti-infective Ciprofloxacin: Preparation, Characterization, and Influence of Size on Cellular Uptake. Mol Pharm 2018; 15:1081-1096. [PMID: 29425049 DOI: 10.1021/acs.molpharmaceut.7b00967] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The majority of the currently used and developed anti-infectives are poorly water-soluble molecules. The poor solubility might lead to limited bioavailability and pharmacological action of the drug. Novel pharmaceutical materials have thus been designed to solve those problems and improve drug delivery. In this study, we propose a facile method to produce submicrocarriers (sMCs) by electrostatic gelation of anionic ß-cyclodextrin (aß-CD) and chitosan. The average hydrodynamic size ranged from 400 to 900 nm by carefully adjusting polymer concentrations and N/C ratio. The distinct host-guest reaction of cyclodextrin derivative is considered as a good approach to enhance solubility, and prevent drug recrystallization, and thus was used to develop sMC to improve the controlled release profile of a poorly soluble and clinically relevant anti-infective ciprofloxacin. The optimal molar ratio of ciprofloxacin to aß-CD was found to be 1:1, which helped maximize encapsulation efficiency (∼90%) and loading capacity (∼9%) of ciprofloxacin loaded sMCs. Furthermore, to recommend the future application of the developed sMCs, the dependence of cell uptake on sMCs size (500, 700, and 900 nm) was investigated in vitro on dTHP-1 by both flow cytometry and confocal microscopy. The results demonstrate that, regardless of their size, an only comparatively small fraction of the sMCs were taken up by the macrophage-like cells, while most of the carriers were merely adsorbed to the cell surface after 2 h incubation. After continuing the incubation to reach 24 h, the majority of the sMCs were found intracellularly. However, the sMCs had been designed to release sufficient amount of drug within 24 h, and the subsequent phagocytosis of the carrier may be considered as an efficient pathway for its safe degradation and elimination. In summary, the developed sMC is a suitable system with promising perspectives recommended for pulmonary extracellular infection therapeutics.
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Affiliation(s)
- Duy-Khiet Ho
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarland University , D-66123 Saarbrücken , Germany.,Department of Pharmacy , Saarland University , D-66123 Saarbrücken , Germany
| | - Ana Costa
- I3S, Instituto de Investigação e Inovação em Saúde Universidade do Porto , 4200-135 Porto , Portugal.,Instituto Nacional de Engenharia Biomédica (INEB), Universidade do Porto , 4200-135 Porto , Portugal.,Instituto Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto , 4050-313 Porto , Portugal
| | - Chiara De Rossi
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarland University , D-66123 Saarbrücken , Germany
| | - Cristiane de Souza Carvalho-Wodarz
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarland University , D-66123 Saarbrücken , Germany
| | - Brigitta Loretz
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarland University , D-66123 Saarbrücken , Germany
| | - Claus-Michael Lehr
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarland University , D-66123 Saarbrücken , Germany.,Department of Pharmacy , Saarland University , D-66123 Saarbrücken , Germany
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12
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Abstract
Chitosan and its derivatives as vehicles for drug delivery can achieve the purpose of sustained release and controlled release for drugs, improve the stability of drugs, and reduce adverse drug reactions. So, the bioavailability of drugs can be enhanced. Therefore, chitosan and its derivatives have become a hotspot in the field of drug delivery. Their characteristics as drug delivery vectors were introduced, the types and applications were summarized. The development direction of chitosan and its derivatives in this field was also forecasted.
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Affiliation(s)
- Gangliang Huang
- Active Carbohydrate Research Center, Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing, China
| | - Yang Liu
- Active Carbohydrate Research Center, Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing, China
| | - Ling Chen
- Active Carbohydrate Research Center, Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing, China
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13
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Liu L, Yao W, Rao Y, Lu X, Gao J. pH-Responsive carriers for oral drug delivery: challenges and opportunities of current platforms. Drug Deliv 2017; 24:569-581. [PMID: 28195032 PMCID: PMC8241197 DOI: 10.1080/10717544.2017.1279238] [Citation(s) in RCA: 178] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 01/03/2017] [Accepted: 01/03/2017] [Indexed: 10/25/2022] Open
Abstract
Oral administration is a desirable alternative of parenteral administration due to the convenience and increased compliance to patients, especially for chronic diseases that require frequent administration. The oral drug delivery is a dynamic research field despite the numerous challenges limiting their effective delivery, such as enzyme degradation, hydrolysis and low permeability of intestinal epithelium in the gastrointestinal (GI) tract. pH-Responsive carriers offer excellent potential as oral therapeutic systems due to enhancing the stability of drug delivery in stomach and achieving controlled release in intestines. This review provides a wide perspective on current status of pH-responsive oral drug delivery systems prepared mainly with organic polymers or inorganic materials, including the strategies used to overcome GI barriers, the challenges in their development and future prospects, with focus on technology trends to improve the bioavailability of orally delivered drugs, the mechanisms of drug release from pH-responsive oral formulations, and their application for drug delivery, such as protein and peptide therapeutics, vaccination, inflammatory bowel disease (IBD) and bacterial infections.
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Affiliation(s)
- Lin Liu
- The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, PR China
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, PR China, and
| | - WenDong Yao
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, PR China
| | - YueFeng Rao
- The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, PR China
| | - XiaoYang Lu
- The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, PR China
| | - JianQing Gao
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, PR China, and
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14
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Knipe JM, Strong LE, Peppas NA. Enzyme- and pH-Responsive Microencapsulated Nanogels for Oral Delivery of siRNA to Induce TNF-α Knockdown in the Intestine. Biomacromolecules 2016; 17:788-97. [PMID: 26813877 DOI: 10.1021/acs.biomac.5b01518] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Inflammatory bowel diseases (IBD) manifest from excessive intestinal inflammation. Local delivery of siRNA that targets these inflammatory cytokines would provide a novel treatment approach. Microencapsulated nanogels are designed and validated as platforms for oral delivery of siRNA targeting TNF-α, a common clinical target of IBD treatments. The preferred platform was designed to (i) protect siRNA-loaded nanogels from the harsh acidic environment of the upper GI tract and (ii) enzymatically degrade and release the nanogels once the carrier has reached the intestinal region. This platform consists of microgels composed of poly(methacrylic acid-co-N-vinyl-2-pyrrolidone) (P[MAA-co-NVP]) cross-linked with a trypsin-degradable peptide linker. The P(MAA-co-NVP) backbone is designed to collapse around and protect encapsulated nanogel from degradation at the low pH levels seen in the stomach (pH 2-4). At pH levels of 6-7.5, as typically observed in the intestine, the P(MAA-co-NVP) matrix swells, potentially facilitating diffusion of intestinal fluid and degradation of the matrix by intestinal enzymes such as trypsin, thus "freeing" the therapeutic nanogels for delivery and cellular uptake within the intestine. TNF-α siRNA-loaded nanogels released from this platform were capable of inducing potent knockdown of secreted TNF-α levels in murine macrophages, further validating the potential for this approach to be used for the treatment of IBD.
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Affiliation(s)
- Jennifer M Knipe
- Department of Chemical Engineering, C0400, The University of Texas at Austin , Austin, Texas 78712, United States.,Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Laura E Strong
- Department of Biomedical Engineering, C0800, The University of Texas at Austin , Austin, Texas 78712, United States.,Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Nicholas A Peppas
- Department of Chemical Engineering, C0400, The University of Texas at Austin , Austin, Texas 78712, United States.,Department of Biomedical Engineering, C0800, The University of Texas at Austin , Austin, Texas 78712, United States.,Department of Surgery and Perioperative Care, Dell Medical School, The University of Texas at Austin , Austin, Texas 78712, United States.,College of Pharmacy, A1900, The University of Texas at Austin , Austin, Texas 78712, United States.,Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin , Austin, Texas 78712, United States
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15
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Wang P, Lin L, Guo Z, Chen J, Tian H, Chen X, Yang H. Highly Fluorescent Gene Carrier Based on Ag-Au Alloy Nanoclusters. Macromol Biosci 2015; 16:160-7. [DOI: 10.1002/mabi.201500235] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 06/30/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Ping Wang
- College of Chemistry; Jilin University; Changchun 130012 China
| | - Lin Lin
- Key Laboratory of polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 China
| | - Zhaopei Guo
- Key Laboratory of polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 China
| | - Jie Chen
- Key Laboratory of polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 China
| | - Huayu Tian
- Key Laboratory of polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 China
| | - Xuesi Chen
- Key Laboratory of polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 China
| | - Hua Yang
- College of Chemistry; Jilin University; Changchun 130012 China
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16
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Koetting MC, Peters JT, Steichen SD, Peppas NA. Stimulus-responsive hydrogels: Theory, modern advances, and applications. MATERIALS SCIENCE & ENGINEERING. R, REPORTS : A REVIEW JOURNAL 2015; 93:1-49. [PMID: 27134415 PMCID: PMC4847551 DOI: 10.1016/j.mser.2015.04.001] [Citation(s) in RCA: 543] [Impact Index Per Article: 60.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Over the past century, hydrogels have emerged as effective materials for an immense variety of applications. The unique network structure of hydrogels enables very high levels of hydrophilicity and biocompatibility, while at the same time exhibiting the soft physical properties associated with living tissue, making them ideal biomaterials. Stimulus-responsive hydrogels have been especially impactful, allowing for unprecedented levels of control over material properties in response to external cues. This enhanced control has enabled groundbreaking advances in healthcare, allowing for more effective treatment of a vast array of diseases and improved approaches for tissue engineering and wound healing. In this extensive review, we identify and discuss the multitude of response modalities that have been developed, including temperature, pH, chemical, light, electro, and shear-sensitive hydrogels. We discuss the theoretical analysis of hydrogel properties and the mechanisms used to create these responses, highlighting both the pioneering and most recent work in all of these fields. Finally, we review the many current and proposed applications of these hydrogels in medicine and industry.
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Affiliation(s)
- Michael C. Koetting
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, United States
| | - Jonathan T. Peters
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, United States
| | - Stephanie D. Steichen
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, United States
| | - Nicholas A. Peppas
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, United States
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, United States
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17
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Knipe JM, Chen F, Peppas NA. Enzymatic biodegradation of hydrogels for protein delivery targeted to the small intestine. Biomacromolecules 2015; 16:962-72. [PMID: 25674922 DOI: 10.1021/bm501871a] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Multiresponsive poly(methacrylic acid-co-N-vinylpyrrolidone) hydrogels were synthesized with biodegradable oligopeptide crosslinks. The oligopeptide crosslinks were incorporated using EDC-NHS zero-length links between the carboxylic acid groups of the polymer and free primary amines on the peptide. The reaction of the peptide was confirmed by primary amine assay and IR spectroscopy. The microgels exhibited pH-responsive swelling as well as enzyme-catalyzed degradation targeted by trypsin present in the small intestine, as demonstrated upon incubation with gastrointestinal fluids from rats. Relative turbidity was used to evaluate enzyme-catalyzed degradation as a function of time, and initial trypsin concentration controlled both the degradation mechanism as well as the extent of degradation. Trypsin activity was effectively extinguished by incubation at 70 °C, and both the microgels and degradation products posed no cytotoxic effect toward two different cell lines. The microgels demonstrated pH-dependent loading of the protein insulin for oral delivery to the small intestine.
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Affiliation(s)
- Jennifer M Knipe
- Department of Chemical Engineering, C0400, ‡Department of Biomedical Engineering, C0800, §College of Pharmacy, A1900, and #Institute for Biomaterials, Drug Delivery and Regenerative Medicine, C0800, The University of Texas at Austin , Austin, Texas 78712, United States
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