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Lim YGJ, Low HYJ, Loo SCJ. Synthesis of Polymeric Janus Superstructures via a Facile Synthesis Method. Macromol Rapid Commun 2020; 41:e2000140. [PMID: 32449578 DOI: 10.1002/marc.202000140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/21/2020] [Indexed: 12/21/2022]
Abstract
Polymeric Janus particles can be exploited for a myriad of applications. Through the understanding of interfacial tensions, theragnostic agents such as drugs or nanomaterials can be successfully encapsulated into Janus particles without losing their anisotropic structure. In this work, it is reported that how Janus superstructures, as a further extension of the Janus morphology, can be obtained by blending other synthesis parameters into the solvent emulsion process, while adhering to the requirements of the Harkin's spreading coefficient (HSC) theory. Designing such unique structures for drug delivery can provide a broader range of possibilities and applications beyond conventional Janus particles.
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Affiliation(s)
- Yi Guang Jerome Lim
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Hui Ying Jessalyn Low
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Say Chye Joachim Loo
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.,Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.,Harvard T.H. Chan School of Public Health, 677 Huntington Ave, Boston, MA, 02115, USA
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2
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Theerasilp M, Crespy D. pH-Responsive Nanofibers for Precise and Sequential Delivery of Multiple Payloads. ACS APPLIED BIO MATERIALS 2019; 2:4283-4290. [PMID: 35021443 DOI: 10.1021/acsabm.9b00551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Effective combination therapies can be achieved by programming materials for controlling release sequence, timing, and dose of multiple payloads. Herein, we synthesize dextran esters by coesterification of dextran, which display responsive properties at a precise pH threshold between 5.0 and 7.0. Multilayers electrospun nanofibers are prepared so that three different payloads are entrapped in three different dextran esters. The release of the three drugs can be sequentially and independently activated by a gradual increase of pH value. Because both pH threshold and release kinetics are matching conditions encountered by aliments along the gastrointestinal tract, these dextran ester multilayer nanofibers are promising for oral drug delivery.
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Affiliation(s)
- Man Theerasilp
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
| | - Daniel Crespy
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
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Chu A, Nguyen D, Talathi SS, Wilson AC, Ye C, Smith WL, Kaplan AD, Duoss EB, Stolaroff JK, Giera B. Automated detection and sorting of microencapsulation via machine learning. LAB ON A CHIP 2019; 19:1808-1817. [PMID: 30982831 DOI: 10.1039/c8lc01394b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Microfluidic-based microencapsulation requires significant oversight to prevent material and quality loss due to sporadic disruptions in fluid flow that routinely arise. State-of-the-art microcapsule production is laborious and relies on experts to monitor the process, e.g. through a microscope. Unnoticed defects diminish the quality of collected material and/or may cause irreversible clogging. To address these issues, we developed an automated monitoring and sorting system that operates on consumer-grade hardware in real-time. Using human-labeled microscope images acquired during typical operation, we train a convolutional neural network that assesses microencapsulation. Based on output from the machine learning algorithm, an integrated valving system collects desirable microcapsules or diverts waste material accordingly. Although the system notifies operators to make necessary adjustments to restore microencapsulation, we can extend the system to automate corrections. Since microfluidic-based production platforms customarily collect image and sensor data, machine learning can help to scale up and improve microfluidic techniques beyond microencapsulation.
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Affiliation(s)
- Albert Chu
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
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Jenjob R, Seidi F, Crespy D. Encoding materials for programming a temporal sequence of actions. J Mater Chem B 2018; 6:1433-1448. [DOI: 10.1039/c7tb03215c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Materials are usually synthesized to allow a function that is either independent of time or that can be triggered in a specific environment.
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Affiliation(s)
- R. Jenjob
- Department of Materials Science and Engineering
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology
- Rayong 21210
- Thailand
| | - F. Seidi
- Department of Materials Science and Engineering
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology
- Rayong 21210
- Thailand
| | - D. Crespy
- Department of Materials Science and Engineering
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology
- Rayong 21210
- Thailand
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Tang J, Mi J, Huang W, Zhong H, Li Y, Zhou J, Johri AM. Controlled drug release from ultrasound-visualized elastic eccentric microcapsules using different resonant modes. J Mater Chem B 2018; 6:1920-1929. [DOI: 10.1039/c7tb03164e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The release rate of drug from elastic eccentric microcapsules can be regulated, based on their mode shapes and resonant natural frequencies.
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Affiliation(s)
- Junyun Tang
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Jiaomei Mi
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Wenwei Huang
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Huixiang Zhong
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Yan Li
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Jianhua Zhou
- Department of Biomedical Engineering
- School of Engineering
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Amer M. Johri
- Department of Medicine
- Division of Cardiology
- Cardiovascular Imaging Network at Queen's University
- Kingston
- Canada
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He CW, Parowatkin M, Mailänder V, Flechtner-Mors M, Ziener U, Landfester K, Crespy D. Sequence-Controlled Delivery of Peptides from Hierarchically Structured Nanomaterials. ACS APPLIED MATERIALS & INTERFACES 2017; 9:3885-3894. [PMID: 28051296 DOI: 10.1021/acsami.6b13176] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Peptide drugs delivered orally need to be protected from degradation for achieving their functions. To fulfill the complicated task of oral drug delivery, we present a hierarchically structured drug-delivery system that can undertake structural changes, so multiple functions can be triggered by a sequence of stimuli. Such hierarchical system is achieved in a nanoparticle-in-nanofiber configuration, in which both the nanofibers and the nanoparticles are pH-responsive and biocompatible. A model peptide is efficiently encapsulated under mild condition, and the nanocarriers are further electrospun with a pH-responsive mucoadhesive polymer. The nanoparticles are released from the nanofibers, and thereafter the peptides are released from the nanoparticles in a pH-responsive manner. The nanoparticles are compatible with caco-2 cells, and the endocytosis of the nanoparticles is described in detail.
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Affiliation(s)
- Carl Wei He
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Maria Parowatkin
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Volker Mailänder
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | | | | | - Katharina Landfester
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Daniel Crespy
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology , 21210 Rayong, Thailand
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Yang N, Sampathkumar K, Loo SCJ. Recent advances in complementary and replacement therapy with nutraceuticals in combating gastrointestinal illnesses. Clin Nutr 2016; 36:968-979. [PMID: 27654926 DOI: 10.1016/j.clnu.2016.08.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 08/17/2016] [Accepted: 08/20/2016] [Indexed: 12/14/2022]
Abstract
The digestive system provides nourishment to the whole body. Disorders in this system would result in many associated illnesses as the body is deprived of essential nutrients. Gastrointestinal diseases, in particular, gastric ulceration, inflammatory bowel diseases and colorectal cancer have become more prevalent in all population age groups. While this can be attributed to diet and lifestyle changes, the measures to combat these illnesses with conventional drugs is losing popularity owing to the harsh side effects, drug resistance and lack of patient compliance. The focus of this review is to endorse promising nutraceutical dietary components such as phytosterols, polyphenols, anthocyanins and polyunsaturated fatty acids and their synergistic value, in combination with conventional management of key gastrointestinal diseases. As most of these nutraceuticals are labile compounds, the need for protection and delivery using a carrier system is stressed and the methods for targeting to specific parts of the gastrointestinal tract are discussed. A section has also been devoted to perspectives on co-encapsulation methods of drugs and nutraceuticals using different particle systems. Multilayered carrier systems like double layered and core shell particles have been proposed as an exemplary system to co-encapsulate both drugs and nutrients while keeping them segregated.
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Affiliation(s)
- Natasha Yang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 693798, Singapore
| | - Kaarunya Sampathkumar
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 693798, Singapore
| | - Say Chye Joachim Loo
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 693798, Singapore; Singapore Centre on Environmental Life Sciences Engineering, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.
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Du C, Zhao J, Fei J, Gao L, Cui W, Yang Y, Li J. Alginate-Based Microcapsules with a Molecule Recognition Linker and Photosensitizer for the Combined Cancer Treatment. Chem Asian J 2013; 8:736-42. [DOI: 10.1002/asia.201201088] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Indexed: 11/10/2022]
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Lee WL, Wee P, Nugraha C, Loo SCJ. Gastric-floating microcapsules provide controlled and sustained release of multiple cardiovascular drugs. J Mater Chem B 2013; 1:1090-1095. [PMID: 32260831 DOI: 10.1039/c2tb00495j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Floating polymeric microcapsules that simultaneously entrap multiple drugs were prepared using a solid/water/oil/water emulsion solvent evaporation method, based on harnessing interfacial phenomena and manipulation of the solvent removal process. The fabricated microcapsules exhibited excellent buoyancy in simulated gastric fluid and provided controlled and sustained release of multiple drugs for up to 24 h, thus revealing their potential as a rate-controlled oral drug delivery system.
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Affiliation(s)
- Wei Li Lee
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore.
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Lee WL, Seh YC, Widjaja E, Chong HC, Tan NS, Joachim Loo SC. Fabrication and Drug Release Study of Double-Layered Microparticles of Various Sizes. J Pharm Sci 2012; 101:2787-97. [DOI: 10.1002/jps.23191] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 03/27/2012] [Accepted: 04/24/2012] [Indexed: 12/21/2022]
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Lee WL, Loo SCJ. Revolutionizing drug delivery through biodegradable multilayered particles. J Drug Target 2012; 20:633-47. [PMID: 22738195 DOI: 10.3109/1061186x.2012.702772] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Modern drug discovery technologies are discovering more and more potent therapeutic agents with narrow therapeutic windows, thus necessitating the improvement of current particulate drug delivery systems. Conventional single-layered polymeric particles have limited control over drug release profiles, including burst release, the inability to provide zero-order, pulsatile, time-delayed release and controlled release of multiple drugs. In an attempt to better control drug release kinetics, the development of multilayered microparticles has been introduced. In this review, we give an overview of the fabrication and characterization techniques of multilayered polymeric microparticles. We also focus on the one-step solvent evaporation technique, and the key process parameters in this technique that affect the formation of microparticle configurations. In addition, the benefits and challenges of multilayered microparticulate system for drug delivery were discussed. This review intends to portray how distinctive structural attributes and degradation behaviors of multilayered microparticles can be exploited to fine-tune drug release profiles and kinetics.
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Affiliation(s)
- Wei Li Lee
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave., Singapore, Singapore
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