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Sethi S, Bhatia S, Kamboj S, Singh RS, Rana V. Assessing the viability of carbamoylethyl pullulan-g-stearic acid based smart polymeric micelles for tumor targeting of raloxifene. Drug Dev Ind Pharm 2021; 47:1986-1997. [PMID: 35645171 DOI: 10.1080/03639045.2022.2083153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The present investigation entails the synthesis of smart pullulan polymeric micelles for evaluating its tumor targeting potential. For this purpose, two step polymerization synthesis reactions were conducted. In the first step, carbamoylethylation occurs by reaction of the free alcoholic moieties at 6th position of glucopyranose unit of pullulan with acrylamide in presence of alkali to obtain carbamoylethyl pullulan (CmP). In the second step, CmP undergoes graft polymerization with stearic acid (SA) to obtain CmP-g-stearic acid diblock co-polymer (CmP-g-SA) as evident from FTIR and NMR analysis. The XpRD spectra showed crystalline nature that was further confirmed by SEM indicating rough and poly-porous morphology. The QbD based optimized formulations of raloxifene HCl (RLX) loaded polymeric micelles (RLX PMs) exhibited pH-dependent release profile with added advantage of 1.2 times reduction in percentage hemolysis giving substantial compatibility with erythrocytes. In vivo pharmacokinetic performance of RLX PMs suggested enhanced mean residence time and volume of distribution. Besides, the biodistribution study of RLX PMs manifested enhanced entry of RLX in mammary carcinoma tissues as compared to normal tissues suggested that CmP-g-SA based micelles enhanced the anti-tumor activity of RLX. Overall, the findings pointed toward the biocompatibility of CmP-g-SA as a potential carrier system for the delivery of RLX.
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Affiliation(s)
- Sheshank Sethi
- Pharmaceutics Division, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | - Sachin Bhatia
- Pharmaceutics Division, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | | | - Ram Sarup Singh
- Department of Biotechnology, Carbohydrate and Protein Biotechnology Laboratory, Punjabi University, Patiala, India
| | - Vikas Rana
- Pharmaceutics Division, Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
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2
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Mun A, Simaan Yameen H, Edelbaum G, Seliktar D. Alginate hydrogel beads embedded with drug-bearing polycaprolactone microspheres for sustained release of paclobutrazol. Sci Rep 2021; 11:10877. [PMID: 34035364 PMCID: PMC8149846 DOI: 10.1038/s41598-021-90338-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 04/06/2021] [Indexed: 12/14/2022] Open
Abstract
In recent years there has been a growing demand for the development of agrochemical controlled release (CR) technologies. In the present study, we aimed to create a novel agricultural CR device using two polymeric systems that have been predominantly employed in biomedical applications: beads of alginate hydrogel embedded with drug-bearing Polycaprolactone (PCL) microspheres. The combined device utilizes the advantages of each polymer type for biodegradation and controlled release of Paclobutrazol (PBZ), a common growth retardant in plants. Surface morphology of the alginate beads was characterized by scanning electron microscopy (SEM) and water immersion tests were performed for stability and controlled release measurements. Bioassays were performed both in accelerated laboratory conditions and in field conditions. The results showed a capability to control the size of PBZ-loaded PCL microspheres through modification of homogenization speed and emulsifier concentration. Enlargement of PCL microsphere size had an adverse effect on release of PBZ from the alginate device. The growth of oatmeal plants as a model system was affected by the controlled release of PBZ. The preliminary field experiment observed growth retardation during two consecutive rainy seasons, with results indicating a substantial benefit of the sustained growth inhibition through the controlled release formulation. The final product has the potential to be used as a carrier for different substances in the agrochemical industry.
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Affiliation(s)
- Alexandra Mun
- Faculty of Biomedical Engineering, Technion Israel Institute of Technology, 32000, Haifa, Israel.,Directorate of Defense Research & Development, IDF, Tel Aviv, Israel
| | - Haneen Simaan Yameen
- Faculty of Biomedical Engineering, Technion Israel Institute of Technology, 32000, Haifa, Israel
| | - Giora Edelbaum
- Directorate of Defense Research & Development, IDF, Tel Aviv, Israel
| | - Dror Seliktar
- Faculty of Biomedical Engineering, Technion Israel Institute of Technology, 32000, Haifa, Israel.
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3
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Abstract
Circadian rhythms describe physiological systems that repeat themselves with a cycle of approximately 24 h. Our understanding of the cellular and molecular origins of these oscillations has improved dramatically, allowing us to appreciate the significant role these oscillations play in maintaining physiological homeostasis. Circadian rhythms allow living organisms to predict and efficiently respond to a dynamically changing environment, set by repetitive day/night cycles. Since circadian rhythms underlie almost every aspect of human physiology, it is unsurprising that they also influence the response of a living organism to disease, stress, and therapeutics. Therefore, not only do the mechanisms that maintain health and disrupt homeostasis depend on our internal circadian clock, but also the way drugs are perceived and function depends on these physiological rhythms. We present a holistic view of the therapeutic process, discussing components such as disease state, pharmacokinetics, and pharmacodynamics, as well as adverse reactions that are critically affected by circadian rhythms. We outline challenges and opportunities in moving toward personalized medicine approaches that explore and capitalize on circadian rhythms for the benefit of the patient.
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Affiliation(s)
- Yaakov Nahmias
- Center for Bioengineering, School of Computer Science and Engineering, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Ioannis P Androulakis
- Department of Biomedical Engineering and Department of Chemical & Biochemical Engineering, Rutgers University, Piscataway, New Jersey 08854, USA; .,Department of Surgery, Robert Wood Johnson Medical School, Rutgers University, Piscataway, New Jersey 08854, USA
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4
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Impact of polyelectrolytes on lysozyme properties in colloidal dispersions. Colloids Surf B Biointerfaces 2019; 183:110419. [DOI: 10.1016/j.colsurfb.2019.110419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 11/20/2022]
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5
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Slavutsky AM, Bertuzzi MA. Formulation and characterization of hydrogel based on pectin and brea gum. Int J Biol Macromol 2019; 123:784-791. [DOI: 10.1016/j.ijbiomac.2018.11.038] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 11/07/2018] [Accepted: 11/07/2018] [Indexed: 12/26/2022]
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Emi TT, Barnes T, Orton E, Reisch A, Tolouei AE, Madani SZM, Kennedy SM. Pulsatile Chemotherapeutic Delivery Profiles Using Magnetically Responsive Hydrogels. ACS Biomater Sci Eng 2018; 4:2412-2423. [PMID: 30019005 PMCID: PMC6039960 DOI: 10.1021/acsbiomaterials.8b00348] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 05/15/2018] [Indexed: 12/17/2022]
Abstract
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Pulsatile
chemotherapeutic delivery profiles may provide a number
advantages by maximizing the anticancer toxicity of chemotherapeutics,
reducing off-target side effects, and combating adaptive resistance.
While these temporally dynamic deliveries have shown some promise,
they have yet to be clinically deployed from implantable hydrogels,
whose localized deliveries could further enhance therapeutic outcomes.
Here, several pulsatile chemotherapeutic delivery profiles were tested
on melanoma cell survival in vitro and compared to constant (flatline)
delivery profiles of the same integrated dose. Results indicated that
pulsatile delivery profiles were more efficient at killing melanoma
cells than flatline deliveries. Furthermore, results suggested that
parameters like the duration of drug “on” periods (pulse
width), delivery rates during those periods (pulse heights), and the
number/frequency of pulses could be used to optimize delivery profiles.
Optimization of pulsatile profiles at tumor sites in vivo would require
hydrogel materials capable of producing a wide variety of pulsatile
profiles (e.g., of different pulse heights, pulse widths, and pulse
numbers). This work goes on to demonstrate that magnetically responsive,
biphasic ferrogels are capable of producing pulsatile mitoxantrone
delivery profiles similar to those tested in vitro. Pulse parameters
such as the timing and rate of delivery during “on”
periods could be remotely regulated through the use of simple, hand-held
magnets. The timing of pulses was controlled simply by deciding when
and for how long to magnetically stimulate. The rate of release during
pulse “on” periods was a function of the magnetic stimulation
frequency. These findings add to the growing evidence that pulsatile
chemotherapeutic delivery profiles may be therapeutically beneficial
and suggest that magnetically responsive hydrogels could provide useful
tools for optimizing and clinically deploying pulsatile chemotherapeutic
delivery profiles.
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Affiliation(s)
- Tania T Emi
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Tanner Barnes
- Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, Rhode Island 028881, United States
| | - Emma Orton
- Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, Rhode Island 028881, United States
| | - Anne Reisch
- Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, Rhode Island 028881, United States
| | - Anita E Tolouei
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - S Zahra M Madani
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Stephen M Kennedy
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States.,Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, Rhode Island 028881, United States
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7
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Kennedy S, Roco C, Déléris A, Spoerri P, Cezar C, Weaver J, Vandenburgh H, Mooney D. Improved magnetic regulation of delivery profiles from ferrogels. Biomaterials 2018; 161:179-189. [PMID: 29421554 PMCID: PMC5849080 DOI: 10.1016/j.biomaterials.2018.01.049] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/16/2018] [Accepted: 01/27/2018] [Indexed: 01/01/2023]
Abstract
While providing the ability to magnetically enhance delivery rates, ferrogels have not been able to produce the various types of regulated delivery profiles likely needed to direct complex biological processes. For example, magnetically triggered release after prolonged periods of payload retention have not been demonstrated and little has been accomplished towards remotely controlling release rate through alterations in the magnetic signal. Also, strategies do not exist for magnetically coordinating multi-drug sequences. The purpose of this study was to develop these capabilities through improved ferrogel design and investigating how alterations in the magnetic signal impact release characteristics. Results show that delivery rate can be remotely regulated using the frequency of magnetic stimulation. When using an optimized biphasic ferrogel design, stimulation at optimized frequencies enabled magnetically triggered deliveries after a delay of 5 days that were 690- to 1950-fold higher than unstimulated baseline values. Also, a sequence of two payloads was produced by allowing one payload to initially diffuse out of the ferrogel, followed by magnetically triggered release of a different payload on day 5. Finally, it was demonstrated that two payloads could be sequentially triggered for release by first stimulating at a frequency tuned to preferentially release one payload (after 24 h), followed by stimulation at a different frequency tuned to preferentially release the other payload (After 4 days). The strategies developed here may expand the utility of ferrogels in clinical scenarios where the timing and sequence of biological events can be tuned to optimize therapeutic outcome.
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Affiliation(s)
- Stephen Kennedy
- Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA; Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, RI 02881, USA; Department of Chemical Engineering, University of Rhode Island, Kingston, RI 02881, USA
| | - Charles Roco
- Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Alizée Déléris
- Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Patrizia Spoerri
- Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Christine Cezar
- Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - James Weaver
- Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Herman Vandenburgh
- Department of Molecular Pharmacology, Physiology and Biotechnology, Department of Pathology and Laboratory Medicine, Brown University, Providence, RI 02912, USA
| | - David Mooney
- Wyss Institute for Biologically Inspired Engineering, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
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8
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Synthesis, Curing Behavior and Swell Tests of pH-Responsive Coatings from Acryl-Terminated Oligo(β-Amino Esters). CHEMOSENSORS 2018. [DOI: 10.3390/chemosensors6010010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Naeem F, Khan S, Jalil A, Ranjha NM, Riaz A, Haider MS, Sarwar S, Saher F, Afzal S. pH responsive cross-linked polymeric matrices based on natural polymers: effect of process variables on swelling characterization and drug delivery properties. BIOIMPACTS : BI 2017; 7:177-192. [PMID: 29159145 PMCID: PMC5684509 DOI: 10.15171/bi.2017.21] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 07/15/2017] [Accepted: 07/16/2017] [Indexed: 01/29/2023]
Abstract
Introduction: The current work was aimed to design and synthesize novel crosslinked pH-sensitive gelatin/pectin (Ge/Pec) hydrogels using different polymeric ratios and to explore the effect of polymers and degree of crosslinking on dynamic, equilibrium swelling and in vitro release behavior of the model drug (Mannitol). Methods: The Ge/Pec based hydrogels were prepared using glutaraldehyde as the crosslinker. Various structural parameters that affect their release behavior were determined, including swelling study, porosity, sol-gel analysis, average molecular weight between crosslinks (Mc), volume fraction of polymer (V2,s), solvent interaction parameter (χ) and diffusion coefficient. The synthesized hydrogels were subjected to various characterization tools like Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and DSC differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Results: The hydrogels show highest water uptake and release at lower pH values. The FTIR spectra showed an interaction between Ge and Pec, and the drug-loaded samples also showed the drug-related peaks, indicating proper loading of the drug. DSC and TGA studies confirmed the thermal stability of hydrogel samples, while SEM showed the porous nature of hydrogels. The drug release followed non-Fickian diffusion or anomalous mechanism. Conclusion: Aforementioned characterizations reveal the successful formation of copolymer hydrogels. The pH-sensitive swelling ability and drug release behavior suggest that the rate of polymer chain relaxation and drug diffusion from these hydrogels are comparable which also predicts their possible use for site-specific drug delivery.
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Affiliation(s)
- Fahad Naeem
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Samiullah Khan
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur 63100, Punjab, Pakistan
| | - Aamir Jalil
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | | | - Amina Riaz
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | | | - Shoaib Sarwar
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Fareha Saher
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Samrin Afzal
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
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10
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Temperature-responsive copolymeric hydrogel systems synthetized by ionizing radiation. Radiat Phys Chem Oxf Engl 1993 2017. [DOI: 10.1016/j.radphyschem.2017.01.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Schimka S, Lomadze N, Rabe M, Kopyshev A, Lehmann M, von Klitzing R, Rumyantsev AM, Kramarenko EY, Santer S. Photosensitive microgels containing azobenzene surfactants of different charges. Phys Chem Chem Phys 2017; 19:108-117. [DOI: 10.1039/c6cp04555c] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We report on light sensitive microgel particles that can change their volume reversibly in response to illumination with light of different wavelengths.
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Affiliation(s)
- Selina Schimka
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Nino Lomadze
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Maren Rabe
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Alexey Kopyshev
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Maren Lehmann
- Institute of Chemistry
- Technical University Berlin
- 10623 Berlin
- Germany
| | | | | | | | - Svetlana Santer
- Institute of Physics and Astronomy
- University of Potsdam
- 14476 Potsdam
- Germany
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12
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Aw MS, Paniwnyk L. Overcoming T. gondii infection and intracellular protein nanocapsules as biomaterials for ultrasonically controlled drug release. Biomater Sci 2017; 5:1944-1961. [DOI: 10.1039/c7bm00425g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
One of the pivotal matters of concern in intracellular drug delivery is the preparation of biomaterials containing drugs that are compatible with the host target.
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Affiliation(s)
- M. S. Aw
- School of Life Sciences
- Biomolecular and Sports Science
- Faculty of Health and Life Sciences
- Coventry University
- Coventry
| | - L. Paniwnyk
- School of Life Sciences
- Biomolecular and Sports Science
- Faculty of Health and Life Sciences
- Coventry University
- Coventry
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13
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Kozlovskaya V, Xue B, Kharlampieva E. Shape-Adaptable Polymeric Particles for Controlled Delivery. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01740] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Veronika Kozlovskaya
- Chemistry Department and ‡Center for Nanomaterials
and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
| | - Bing Xue
- Chemistry Department and ‡Center for Nanomaterials
and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
| | - Eugenia Kharlampieva
- Chemistry Department and ‡Center for Nanomaterials
and Biointegration, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
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14
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Snapshot of phase transition in thermoresponsive hydrogel PNIPAM: Role in drug delivery and tissue engineering. Macromol Res 2016. [DOI: 10.1007/s13233-016-4052-2] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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15
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Tan S, Lu Z, Zhao J, Zhang J, Wu M, Wu Q, Yang J. Synthesis and multi-responsiveness of poly(N-vinylcaprolactam-co-acrylic acid) core–shell microgels via miniemulsion polymerization. Polym Chem 2016. [DOI: 10.1039/c6py00544f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report herein a facile and large fabrication of multi-responsive poly(N-vinylcaprolactam-co-acrylic acid) microgels with a core–shell structure via seed miniemulsion polymerization. The multi-responsive microgels can reversibly swell and shrink in response to pH and temperature variation.
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Affiliation(s)
- Shen Tan
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Zhengquan Lu
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Jing Zhao
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Jianan Zhang
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Mingyuan Wu
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Qingyun Wu
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
| | - Jianjun Yang
- School of Chemistry and Chemical Engineering
- Anhui University and Anhui Province Key Laboratory of Environment-friendly Polymer Materials
- Hefei 230601
- P. R. China
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16
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Kozlovskaya V, Zavgorodnya O, Ankner JF, Kharlampieva E. Controlling Internal Organization of Multilayer Poly(methacrylic acid) Hydrogels with Polymer Molecular Weight. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | | | - John F. Ankner
- Spallation
Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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17
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Kennedy S, Hu J, Kearney C, Skaat H, Gu L, Gentili M, Vandenburgh H, Mooney D. Sequential release of nanoparticle payloads from ultrasonically burstable capsules. Biomaterials 2015; 75:91-101. [PMID: 26496382 DOI: 10.1016/j.biomaterials.2015.10.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 10/01/2015] [Accepted: 10/05/2015] [Indexed: 12/22/2022]
Abstract
In many biomedical contexts ranging from chemotherapy to tissue engineering, it is beneficial to sequentially present bioactive payloads. Explicit control over the timing and dose of these presentations is highly desirable. Here, we present a capsule-based delivery system capable of rapidly releasing multiple payloads in response to ultrasonic signals. In vitro, these alginate capsules exhibited excellent payload retention for up to 1 week when unstimulated and delivered their entire payloads when ultrasonically stimulated for 10-100 s. Shorter exposures (10 s) were required to trigger delivery from capsules embedded in hydrogels placed in a tissue model and did not result in tissue heating or death of encapsulated cells. Different types of capsules were tuned to rupture in response to different ultrasonic stimuli, thus permitting the sequential, on-demand delivery of nanoparticle payloads. As a proof of concept, gold nanoparticles were decorated with bone morphogenetic protein-2 to demonstrate the potential bioactivity of nanoparticle payloads. These nanoparticles were not cytotoxic and induced an osteogenic response in mouse mesenchymal stem cells. This system may enable researchers and physicians to remotely regulate the timing, dose, and sequence of drug delivery on-demand, with a wide range of clinical applications ranging from tissue engineering to cancer treatment.
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Affiliation(s)
- Stephen Kennedy
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA; Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, RI 02881, USA; Department of Chemical Engineering, University of Rhode Island, Kingston, RI 02881, USA
| | - Jennifer Hu
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Cathal Kearney
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA; Department of Anatomy, Tissue Engineering Research Group and Advanced Materials and Bioengineering Research Center, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Hadas Skaat
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Luo Gu
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Marco Gentili
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Herman Vandenburgh
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02912, USA; Department of Pathology and Laboratory Medicine, Brown University, Providence, RI 02912, USA
| | - David Mooney
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
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18
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Palomino K, Suarez-Meraz KA, Serrano-Medina A, Olivas A, Samano EC, Cornejo-Bravo JM. Microstructured poly(N-isopropylacrylamide) hydrogels with fast temperature response for pulsatile drug delivery. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-015-0841-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Ultrasound-triggered disruption and self-healing of reversibly cross-linked hydrogels for drug delivery and enhanced chemotherapy. Proc Natl Acad Sci U S A 2014; 111:9762-7. [PMID: 24961369 DOI: 10.1073/pnas.1405469111] [Citation(s) in RCA: 273] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Biological systems are exquisitely sensitive to the location and timing of physiologic cues and drugs. This spatiotemporal sensitivity presents opportunities for developing new therapeutic approaches. Polymer-based delivery systems are used extensively for attaining localized, sustained release of bioactive molecules. However, these devices typically are designed to achieve a constant rate of release. We hypothesized that it would be possible to create digital drug release, which could be accelerated and then switched back off, on demand, by applying ultrasound to disrupt ionically cross-linked hydrogels. We demonstrated that ultrasound does not permanently damage these materials but enables nearly digital release of small molecules, proteins, and condensed oligonucleotides. Parallel in vitro studies demonstrated that the concept of applying temporally short, high-dose "bursts" of drug exposure could be applied to enhance the toxicity of mitoxantrone toward breast cancer cells. We thus used the hydrogel system in vivo to treat xenograft tumors with mitoxantrone, and found that daily ultrasound-stimulated drug release substantially reduced tumor growth compared with sustained drug release alone. This approach of digital drug release likely will be applicable to a broad variety of polymers and bioactive molecules, and is a potentially useful tool for studying how the timing of factor delivery controls cell fate in vivo.
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Abstract
AbstractPolymers have been widely used in agriculture for applications including controlled release of pesticides and other active ingredients. The ability to predict their delivery helps avoid environmental hazards. Macromolecular matrices used as carriers in controlled release of agricultural active agents, especially pesticides, are reviewed. The review focuses on the advantages and mechanisms of controlled release. It includes biodegradable polymers in agriculture, their manufacturing methods, and their degradation mechanisms and kinetics. The article also presents a critical account of recent release studies and considers upcoming challenges.
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Bian S, Zheng J, Yang W. Dual stimuli-responsive microgels based on photolabile crosslinker: Temperature sensitivity and light-induced degradation. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27165] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Shanshan Bian
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science; Fudan University; No. 220 Handan Road Shanghai 200433 People's Republic of China
| | - Jin Zheng
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science; Fudan University; No. 220 Handan Road Shanghai 200433 People's Republic of China
| | - Wuli Yang
- State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science; Fudan University; No. 220 Handan Road Shanghai 200433 People's Republic of China
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Hardy JG, Mouser DJ, Arroyo-Currás N, Geissler S, Chow JK, Nguy L, Kim JM, Schmidt CE. Biodegradable electroactive polymers for electrochemically-triggered drug delivery. J Mater Chem B 2014; 2:6809-6822. [DOI: 10.1039/c4tb00355a] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report biodegradable electroactive polymer (EAP)-based materials and their application as drug delivery devices.
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Affiliation(s)
- John G. Hardy
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering
- University of Florida
| | - David J. Mouser
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
| | | | - Sydney Geissler
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering
- University of Florida
| | - Jacqueline K. Chow
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
| | - Lindsey Nguy
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
| | - Jong M. Kim
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
| | - Christine E. Schmidt
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering
- University of Florida
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23
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Kozlovskaya V, Chen J, Tedjo C, Liang X, Campos-Gomez J, Oh J, Saeed M, Lungu CT, Kharlampieva E. pH-responsive hydrogel cubes for release of doxorubicin in cancer cells. J Mater Chem B 2014; 2:2494-2507. [DOI: 10.1039/c4tb00165f] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Doxorubicin (DOX)-loaded poly(methacrylic acid) hydrogel cubes release the drug at pH <5. These hydrogels are developed for shape-directed cellular uptake for drug delivery.
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Affiliation(s)
| | - Jun Chen
- Department of Chemistry
- University of Alabama at Birmingham
- Birmingham, USA
| | - Chrysanty Tedjo
- Department of Chemistry
- University of Alabama at Birmingham
- Birmingham, USA
| | - Xing Liang
- Department of Chemistry
- University of Alabama at Birmingham
- Birmingham, USA
| | - Javier Campos-Gomez
- Department of Biochemistry and Molecular Biology
- Southern Research Institute
- Drug Discovery Division
- Birmingham, USA
| | - Jonghwa Oh
- Department of Environmental Health Sciences
- University of Alabama at Birmingham
- Birmingham, USA
| | - Mohammad Saeed
- Department of Biochemistry and Molecular Biology
- Southern Research Institute
- Drug Discovery Division
- Birmingham, USA
| | - Claudiu T. Lungu
- Department of Environmental Health Sciences
- University of Alabama at Birmingham
- Birmingham, USA
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Malda J, Visser J, Melchels FP, Jüngst T, Hennink WE, Dhert WJA, Groll J, Hutmacher DW. 25th anniversary article: Engineering hydrogels for biofabrication. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:5011-28. [PMID: 24038336 DOI: 10.1002/adma.201302042] [Citation(s) in RCA: 1074] [Impact Index Per Article: 97.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 06/19/2013] [Indexed: 05/19/2023]
Abstract
With advances in tissue engineering, the possibility of regenerating injured tissue or failing organs has become a realistic prospect for the first time in medical history. Tissue engineering - the combination of bioactive materials with cells to generate engineered constructs that functionally replace lost and/or damaged tissue - is a major strategy to achieve this goal. One facet of tissue engineering is biofabrication, where three-dimensional tissue-like structures composed of biomaterials and cells in a single manufacturing procedure are generated. Cell-laden hydrogels are commonly used in biofabrication and are termed "bioinks". Hydrogels are particularly attractive for biofabrication as they recapitulate several features of the natural extracellular matrix and allow cell encapsulation in a highly hydrated mechanically supportive three-dimensional environment. Additionally, they allow for efficient and homogeneous cell seeding, can provide biologically-relevant chemical and physical signals, and can be formed in various shapes and biomechanical characteristics. However, despite the progress made in modifying hydrogels for enhanced bioactivation, cell survival and tissue formation, little attention has so far been paid to optimize hydrogels for the physico-chemical demands of the biofabrication process. The resulting lack of hydrogel bioinks have been identified as one major hurdle for a more rapid progress of the field. In this review we summarize and focus on the deposition process, the parameters and demands of hydrogels in biofabrication, with special attention to robotic dispensing as an approach that generates constructs of clinically relevant dimensions. We aim to highlight this current lack of effectual hydrogels within biofabrication and initiate new ideas and developments in the design and tailoring of hydrogels. The successful development of a "printable" hydrogel that supports cell adhesion, migration, and differentiation will significantly advance this exciting and promising approach for tissue engineering.
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Affiliation(s)
- Jos Malda
- Department of Orthopaedics, University Medical Center Utrecht, P.O. Box 85500, 3508, GA Utrecht, The Netherlands; Institute of Health and Biomedical Innovation, Queensland University of TechnologyKelvin Grove Urban Village, Brisbane, QLD 4059, Australia; Department of Equine Sciences, Faculty of Veterinary Sciences, Utrecht University, Yalelaan 112, 3584 CM, Utrecht, The Netherlands
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Kutyła MJ, Lambert LK, Davies NM, McGeary RP, Shaw PN, Ross BP. Cyclodextrin-crosslinked poly(acrylic acid): Synthesis, physicochemical characterization and controlled release of diflunisal and fluconazole from hydrogels. Int J Pharm 2013; 444:175-84. [DOI: 10.1016/j.ijpharm.2013.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 12/13/2012] [Accepted: 01/02/2013] [Indexed: 10/27/2022]
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26
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Klinger D, Landfester K. Stimuli-responsive microgels for the loading and release of functional compounds: Fundamental concepts and applications. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.08.053] [Citation(s) in RCA: 173] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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27
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Li W, Guo Q, Zhao H, Zhang L, Li J, Gao J, Qian W, Li B, Chen H, Wang H, Dai J, Guo Y. Novel dual-control poly(N-isopropylacrylamide-co-chlorophyllin) nanogels for improving drug release. Nanomedicine (Lond) 2012; 7:383-92. [PMID: 22385198 DOI: 10.2217/nnm.11.100] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIM How to overcome insufficient drug release is an important issue in the drug-delivery system. MATERIALS & METHODS Here, a novel temperature and UV dual-control poly(N-isopropylacrylamide [PNIPAM]-co-chlorophyllin) nanogel was prepared via the surfactant-free emulsion polymerization. RESULTS The introduction of hydrophilic chlorophyllin to the PNIPAM chain backbone led to a narrow size of poly[NIPAM-co-CHLN nanogel (D ∼180 nm) confirmed by atomic force microscopy and transmission electron microscopy. This nanogel had a lower critical solution temperature (∼35°C), observed by dynamic laser light scattering. After the phase transition, the size under UV light (50 nm) was much smaller than that induced by temperature (90 nm). The inhomogeneous collapse was attributed to the temperature-gradient generated from the gel surface to the core with a surrounding dense PNIPAM layer. The obstacles that strongly inhibited 5-fluorouracil release was successfully overcome by light irradiation via a large drug diffusion coefficient. CONCLUSION Consequently, the novel dual functional nanogel is potent for improving the drug-release profile.
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Affiliation(s)
- Wei Li
- International Joint Cancer Institute, The Second Military Medical University, 800 Xiangyin Road, Shanghai 200433, PR China
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Klinger D, Aschenbrenner EM, Weiss CK, Landfester K. Enzymatically degradable nanogels by inverse miniemulsion copolymerization of acrylamide with dextran methacrylates as crosslinkers. Polym Chem 2012. [DOI: 10.1039/c1py00415h] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyacrylamide nanogels crosslinked with dextran methacrylate were prepared by free radical copolymerization in inverse miniemulsion and their degradation by enzymatic cleavage of the polysaccharide chains was investigated.
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29
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Gelation of photopolymerized hyaluronic acid grafted with glycidyl methacrylate. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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BUGLIARELLO GEORGE. MECHANICS, BIOLOGY AND MEDICINE AND THE CHALLENGES OF METAMECHANICS: A PERSONAL REFLECTION. J MECH MED BIOL 2011. [DOI: 10.1142/s0219519409002900] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A brief retrospective of the evolution of mechanics and its reciprocal impacts on medicine and biology is offered, from the limited viewpoint of an early contributor to some aspects of biomechanics. The development of the field after World War II, and particularly in the nineteen sixties and seventies, set the foundation for today's remarkable achievements. Looking ahead, the expanding complexity and challenges of the interaction of mechanics with biology and medicine, together with the loss of centrality of the mechanistic view in the physical sciences, compel a reexamination of the role, potential and limits of mechanics in this context. Future advances call for a broader metamechanics conception encompassing forces, energies, fields, information, network and systems theory, as well as for models spanning the range of scales from atom and molecule to cell, organ and organism.
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31
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32
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Swan MC, Bucknall DG, Goodacre TEE, Czernuszka JT. Synthesis and properties of a novel anisotropic self-inflating hydrogel tissue expander. Acta Biomater 2011; 7:1126-32. [PMID: 20971218 DOI: 10.1016/j.actbio.2010.10.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2010] [Revised: 10/11/2010] [Accepted: 10/19/2010] [Indexed: 11/19/2022]
Abstract
The advent of self-inflating hydrogel tissue expanders heralded a significant advance in the reconstructive techniques available for the surgical restoration of a wide variety of soft tissue defects. However, their use in specific applications such as cleft palate surgery is limited on account of their isotropic expansion. An anisotropic self-inflating hydrogel tissue expander has been developed which markedly increases the potential indications for which this restorative tool may be employed. These include complex pediatric soft tissue reconstructions of the palate, nose, ear and digits. Anisotropic expansion in a hydrogel polymer network composed of methyl methacrylate and vinylpyrrolidone has been achieved by annealing the xerogel under a compressive load for a specified time period. By controlling the anisotropic processing conditions and composition we have been able to accurately tailor the ultimate expansion ratio up to 1500%. The expansion rate of the xerogel has also been significantly reduced by encapsulating the polymer within a semi-permeable silicone membrane. The structure and properties of the novel anisotropic hydrogel were characterized by attenuated total reflectance infrared spectroscopy, differential scanning calorimetry, thermogravimetric analysis and small-angle neutron scattering.
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Affiliation(s)
- M C Swan
- Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, UK.
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33
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Assembly of poly(N-isopropylacrylamide)-co-acrylic acid microgel thin films on polyelectrolyte multilayers: Effects of polyelectrolyte layer thickness, surface charge, and microgel solution pH. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2376-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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34
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LoPresti C, Vetri V, Ricca M, Foderà V, Tripodo G, Spadaro G, Dispenza C. Pulsatile protein release and protection using radiation-crosslinked polypeptide hydrogel delivery devices. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2010.11.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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35
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Mehrotra S, Lynam D, Liu C, Shahriari D, Lee I, Tuszynski M, Sakamoto J, Chan C. Time controlled release of arabinofuranosylcytosine (Ara-C) from agarose hydrogels using layer-by-layer assembly: an in vitro study. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2011; 23:439-63. [PMID: 21294967 PMCID: PMC3873741 DOI: 10.1163/092050610x552221] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Experimentally induced axonal regeneration is compromised by glial scar formation arising from leptomeningeal fibroblasts cells in and around the hydrogel scaffold implanted for nerve repair. Strategies are needed to prevent such fibroblastic reactive cell layer formation for enhanced axonal regeneration. Here, we implement the technique of layer-by-layer assembled degradable, hydrogen bonded multilayers on agarose hydrogels to incorporate an anti-mitotic drug (1-β-D-arabinofuranosylcytosine (Ara-C)) within the agarose hydrogels. We show controlled release of Ara-C under physiological conditions over a period of days. The concentrations of Ara-C released from agarose at the different time points were sufficient to inhibit fibroblast growth in vitro, while not adversely affecting the viability of the neuronal cells.
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Affiliation(s)
- Sumit Mehrotra
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - Daniel Lynam
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - Chun Liu
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - Dena Shahriari
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - Ilsoon Lee
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - Mark Tuszynski
- Center for Neural Repair, Department of Neurosciences, University of California, San Diego, CA 92093, USA
| | - Jeffrey Sakamoto
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
| | - Christina Chan
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
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Wei Q, Zhang F, Li F, Li H, Zang P, Zhao C. Synthesis of Stimuli-responsive Nanoparticles by Solution Polymerization. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2010. [DOI: 10.1080/10601325.2011.537513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Youan BBC. Chronopharmaceutical drug delivery systems: Hurdles, hype or hope? Adv Drug Deliv Rev 2010; 62:898-903. [PMID: 20438781 DOI: 10.1016/j.addr.2010.04.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 04/20/2010] [Accepted: 04/27/2010] [Indexed: 11/25/2022]
Abstract
The current advances in chronobiology and the knowledge gained from chronotherapy of selected diseases strongly suggest that "the one size fits all at all times" approach to drug delivery is no longer substantiated, at least for selected bioactive agents and disease therapy or prevention. Thus, there is a critical and urgent need for chronopharmaceutical research (e.g., design and evaluation of robust, spatially and temporally controlled drug delivery systems that would be clinically intended for chronotherapy by different routes of administration). This review provides a brief overview of current drug delivery system intended for chronotherapy. In theory, such an ideal "magic pill" preferably with affordable cost, would improve the safety, efficacy and patient compliance of old and new drugs. However, currently, there are three major hurdles for the successful transition of such system from laboratory to patient bedside. These include the challenges to identify adequate (i) rhythmic biomaterials and systems, (ii) rhythm engineering and modeling, perhaps using system biology and (iii) regulatory guidance.
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Cirillo G, Iemma F, Spizzirri UG, Puoci F, Curcio M, Parisi OI, Picci N. Synthesis of stimuli-responsive microgels for in vitro release of diclofenac diethyl ammonium. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2010; 22:823-44. [PMID: 20566061 DOI: 10.1163/092050610x496279] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Thermal and dual stimuli-responsive microspheres (pH and temperature) were prepared by free radical polymerization of methacrylate bovine serum albumin (BSA-MA) as cross-linker and sodium methacrylate (NaMA) and/or N-isopropylacrylamide (NIPAAm), as hydrophilic/pH-sensitive and thermo-responsive monomers, respectively. Microgels were characterized by infrared spectroscopy, morphological analysis, particle size distribution and determination of swelling properties. The network density and the shape of the microgels were found to depend on the concentration of the reactive species in the polymerization feed. Thermal analyses were performed to determine lower critical solution temperature values, which become close to the body temperature by increasing the content of the hydrophilic moieties in the network. In order to test the preformed materials as drug carriers, in vitro release studies of Diclofenac diethyl ammonium salt were performed. For all the co-polymers, a predominant drug release in the collapsed state was observed, while below the microgel transition temperature, a drug release through the swollen network occurs. The data recorded during the release tests demonstrated that the pH of the surrounding environment influences the drug release more than the temperature of the imbibing medium.
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Affiliation(s)
- Giuseppe Cirillo
- Dipartimento di Scienze Farmaceutiche, Università della Calabria, Edificio Polifunzionale, Rende (CS) 87036, Italia
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Curcio M, Puoci F, Spizzirri UG, Iemma F, Cirillo G, Parisi OI, Picci N. Negative thermo-responsive microspheres based on hydrolyzed gelatin as drug delivery device. AAPS PharmSciTech 2010; 11:652-62. [PMID: 20405255 DOI: 10.1208/s12249-010-9429-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 04/05/2010] [Indexed: 11/30/2022] Open
Abstract
This paper deals with the synthesis of thermo-responsive microspheres with proteic structure exhibiting a transition temperature close to the body temperature. Temperature-sensitive hydrogels have attracted extensive interest due to their potential and promising applications in drug delivery field since they can undergo a rapid and reversible phase transition from a swollen to a shrunken state depending on environmental temperature. The hydrogels were synthesized by free-radical polymerization of hydrolyzed methacrylated gelatin (HGel-MA) and N,N'-methylenebisacrylamide as pro-hydrophilic multifunctional macromer and crosslinker, respectively, and N-isopropylacrylamide as thermo-responsive monomer. Thermal analyses showed negative thermo-responsive behavior for all compositions and, by increasing the content of the hydrophilic moieties in the network, the transition temperature raised to 36.9 degrees C, close to the physiological values. In order to test the materials as drug carriers, diclofenac sodium salt was chosen as model drug. Drug release profiles, in phosphate buffer solution (pH 7.0, 10(-3) M) at 25 and 40 degrees C, depend on the hydrogel's crosslinking degree and hydrophilic/hydrophobic balance in the polymeric network. For all formulations, in the shrunken state, the drug release percent values ranged from 80% to 100% after 24 h, and after 3 h, more than 60% of therapeutics was delivered. On the contrary, the swelling of the loaded microparticles produces, even after 30 h, a drug release percent of about 75%. By using semi-empirical equations, the release mechanism was extensively studied and the diffusional contribute was evaluated. The physico-chemical characteristics of thermo-responsive materials confirm the applicability of the microspheres as drug delivery device.
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Cooperstein MA, Canavan HE. Biological cell detachment from poly(N-isopropyl acrylamide) and its applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7695-707. [PMID: 20496955 DOI: 10.1021/la902587p] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Over the past two decades, poly(N-isopropyl acrylamide) (pNIPAM) has become widely used for bioengineering applications. In particular, pNIPAM substrates have been used for the nondestructive release of biological cells and proteins. In this feature article, we review the applications for which pNIPAM substrates have been used to release biological cells, including for the study of the extracellular matrix (ECM), for cell sheet engineering and tissue transplantation, the formation of tumorlike spheroids, the study of bioadhesion and bioadsorption, and the manipulation or deformation of individual cells. The articles reviewed include submissions from our own group as well as from those performing research in the field worldwide.
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Affiliation(s)
- Marta A Cooperstein
- Department of Chemical and Nuclear Engineering, Center for Biomedical Engineering, University of New Mexico, Albuquerque, New Mexico, USA
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Kwon HJ, Yasuda K, Ohmiya Y, Honma KI, Chen YM, Gong JP. In vitro differentiation of chondrogenic ATDC5 cells is enhanced by culturing on synthetic hydrogels with various charge densities. Acta Biomater 2010; 6:494-501. [PMID: 19651251 DOI: 10.1016/j.actbio.2009.07.033] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Revised: 06/30/2009] [Accepted: 07/29/2009] [Indexed: 11/28/2022]
Abstract
We investigated the behavior of chondrogenic ATDC5 cells on synthetic polymer gels with various charge densities: negatively charged poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) gel, neutral poly(dimethylacrylamide) (PDMAAm) gel, and copolymer gels of 2-acrylamido-2-methyl-1-propanesulfonic acid and dimethylacrylamide P(AMPS-co-DMAAm) with different compositions (molar fractions of AMPS, F=0.25, 0.5, 0.75). In insulin-free maintenance medium, the ATDC5 cells cultured on the highly negatively charged gels - PAMPS gel and the P(AMPS-co-DMAAm) copolymer gels (F=0.75) - spread and became confluent at day 7, and interestingly formed nodules at day 14, expressing type II collagen and proteoglycan. This result demonstrates that the highly negatively charged gels can induce chondrogenic differentiation of ATDC5 cells even in insulin-free maintenance medium, in which the ATDC5 cells cultured on the standard polystyrene dish cannot differentiate into chondrocytes. In insulin-supplemented differentiation medium, ATDC5 cells cultured on the PDMAAm gel made focal adhesions, rapidly aggregated and formed large nodules within 7 days, expressing significantly greater levels of type II collagen and proteoglycan than cells cultured on the polystyrene dish and the negatively charged gels. These results showed that the neutral gel accelerated chondrogenic differentiation of ATDC5 cells cultured in the differentiation medium. We suggest that the highly negatively charged PAMPS gel and the neutral PDMAAm gel are interesting biomaterials for cartilage tissue engineering as a scaffold with the potential to induce chondrogenic differentiation.
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Affiliation(s)
- Hyuck Joon Kwon
- Regenerative Medicine/Tissue Engineering Division, Research Center for Cooperative Projects, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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Mehrotra S, Lynam D, Maloney R, Pawelec KM, Tuszynski MH, Lee I, Chan C, Sakamoto J. Time Controlled Protein Release from Layer-by-Layer Assembled Multilayer Functionalized Agarose Hydrogels. ADVANCED FUNCTIONAL MATERIALS 2010; 20:247-258. [PMID: 20200599 PMCID: PMC2830720 DOI: 10.1002/adfm.200901172] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Axons of the adult central nervous system exhibit an extremely limited ability to regenerate after spinal cord injury. Experimentally generated patterns of axon growth are typically disorganized and randomly oriented. Support of linear axonal growth into spinal cord lesion sites has been demonstrated using arrays of uniaxial channels, templated with agarose hydrogel, and containing genetically engineered cells that secrete brain-derived neurotrophic factor (BDNF). However, immobilizing neurotrophic factors secreting cells within a scaffold is relatively cumbersome, and alternative strategies are needed to provide sustained release of BDNF from templated agarose scaffolds. Existing methods of loading the drug or protein into hydrogels cannot provide sustained release from templated agarose hydrogels. Alternatively, here it is shown that pH-responsive H-bonded poly(ethylene glycol)(PEG)/poly(acrylic acid)(PAA)/protein hybrid layer-by-layer (LbL) thin films, when prepared over agarose, provided sustained release of protein under physiological conditions for more than four weeks. Lysozyme, a protein similar in size and isoelectric point to BDNF, is released from the multilayers on the agarose and is biologically active during the earlier time points, with decreasing activity at later time points. This is the first demonstration of month-long sustained protein release from an agarose hydrogel, whereby the drug/protein is loaded separately from the agarose hydrogel fabrication process.
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Affiliation(s)
- Sumit Mehrotra
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, MI (USA)
| | - Daniel Lynam
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, MI (USA)
| | - Ryan Maloney
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, MI (USA)
| | - Kendell M. Pawelec
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, MI (USA)
| | - Mark H. Tuszynski
- Director-Center for Neural Repair, Department of Neurosciences, University of California, San Diego 92093, CA (USA)
| | - Ilsoon Lee
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, MI (USA)
| | - Christina Chan
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, MI (USA)
- Department of Biochemistry and Molecular Biology Michigan State University East Lansing, Michigan 48824, MI (USA)
| | - Jeffrey Sakamoto
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, MI (USA)
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Spizzirri UG, Iemma F, Puoci F, Xue F, Gao W, Cirillo G, Curcio M, Parisi OI, Picci N. Synthesis of hydrophilic microspheres with LCST close to body temperature for controlled dual-sensitive drug release. POLYM ADVAN TECHNOL 2010. [DOI: 10.1002/pat.1660] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Siegel RA, Gu Y, Lei M, Baldi A, Nuxoll EE, Ziaie B. Hard and soft micro- and nanofabrication: An integrated approach to hydrogel-based biosensing and drug delivery. J Control Release 2009; 141:303-13. [PMID: 20036310 DOI: 10.1016/j.jconrel.2009.12.012] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Accepted: 12/09/2009] [Indexed: 11/16/2022]
Abstract
We review efforts to produce microfabricated glucose sensors and closed-loop insulin delivery systems. These devices function due to the swelling and shrinking of glucose-sensitive microgels that are incorporated into silicon-based microdevices. The glucose response of the hydrogel is due to incorporated phenylboronic acid (PBA) side chains. It is shown that in the presence of glucose, these polymers alter their swelling properties, either by ionization or by formation of glucose-mediated reversible crosslinks. Swelling pressures impinge on microdevice structures, leading either to a change in resonant frequency of a microcircuit, or valving action. Potential areas for future development and improvement are described. Finally, an asymmetric nano-microporous membrane, which may be integrated with the glucose-sensitive devices, is described. This membrane, formed using photolithography and block polymer assembly techniques, can be functionalized to enhance its biocompatibility and solute size selectivity. The work described here features the interplay of design considerations at the supramolecular, nano, and micro scales.
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Affiliation(s)
- Ronald A Siegel
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA.
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Jagur-Grodzinski J. Polymeric gels and hydrogels for biomedical and pharmaceutical applications. POLYM ADVAN TECHNOL 2009. [DOI: 10.1002/pat.1504] [Citation(s) in RCA: 280] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Zhao WF, Fang BH, Li N, Nie SQ, Wei Q, Zhao CS. Fabrication of pH-responsive molecularly imprinted polyethersulfone particles for bisphenol-A uptake. J Appl Polym Sci 2009. [DOI: 10.1002/app.30014] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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47
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Kozlovskaya VA, Kharlampieva EP, Erel-Unal I, Sukhishvili SA. Single-component layer-by-layer weak polyelectrolyte films and capsules: Loading and release of functional molecules. POLYMER SCIENCE SERIES A 2009. [DOI: 10.1134/s0965545x09060170] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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48
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Roy A, Bajpai J, Bajpai A. Dynamics of controlled release of chlorpyrifos from swelling and eroding biopolymeric microspheres of calcium alginate and starch. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2008.10.013] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Choi WI, Kim M, Tae G, Kim YH. Sustained release of human growth hormone from heparin-based hydrogel. Biomacromolecules 2008; 9:1698-704. [PMID: 18457449 DOI: 10.1021/bm701391b] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Won Il Choi
- Research Center for Biomolecular Nanotechnology and Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
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50
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Owens DE, Jian Y, Fang JE, Slaughter BV, Chen YH, Peppas NA. Thermally Responsive Swelling Properties of Polyacrylamide/Poly(acrylic acid) Interpenetrating Polymer Network Nanoparticles. Macromolecules 2007. [DOI: 10.1021/ma071089x] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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