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Ohya Y, Yoshida Y, Kumagae T, Kuzuya A. Gelation upon the Mixing of Amphiphilic Graft and Triblock Copolymers Containing Enantiomeric Polylactide Segments through Stereocomplex Formation. Gels 2024; 10:139. [PMID: 38391469 PMCID: PMC10887654 DOI: 10.3390/gels10020139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/04/2024] [Accepted: 02/07/2024] [Indexed: 02/24/2024] Open
Abstract
Biodegradable injectable polymer (IP) systems that form hydrogels in situ when injected into the body have considerable potential as medical materials. In this paper, we report a new two-solution mixed biodegradable IP system that utilizes the stereocomplex (SC) formation of poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA). We synthesized triblock copolymers of PLLA and poly(ethylene glycol), PLLA-b-PEG-b-PLLA (tri-L), and a graft copolymer of dextran (Dex) attached to a PDLA-b-PEG diblock copolymer, Dex-g-(PDLA-b-PEG) (gb-D). We found that a hydrogel can be obtained by mixing gb-D solution and tri-L solution via SC formation. Although it is already known that graft copolymers attached to enantiomeric PLLA and PDLA chains can form an SC hydrogel upon mixing, we revealed that hydrogels can also be formed by a combination of graft and triblock copolymers. In this system (graft vs. triblock), the gelation time was shorter, within 1 min, and the physical strength of the resulting hydrogel (G' > 100 Pa) was higher than when graft copolymers were mixed. Triblock copolymers form micelles (16 nm in diameter) in aqueous solutions and hydrophobic drugs can be easily encapsulated in micelles. In contrast, graft copolymers have the advantage that their molecular weight can be set high, contributing to improved mechanical strength of the obtained hydrogel. Various biologically active polymers can be used as the main chains of graft copolymers, and chemical modification using the remaining functional side chain groups is also easy. Therefore, the developed mixing system with a graft vs. triblock combination can be applied to medical materials as a highly convenient, physically cross-linked IP system.
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Affiliation(s)
- Yuichi Ohya
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita 564-8680, Osaka, Japan
- Kansai University Medical Polymer Research Center (KUMP-RC), Organization for Research and Development of Innovative Science and Technology (ORDIST), Kansai University, 3-3-35 Yamate, Suita 564-8680, Osaka, Japan
| | - Yasuyuki Yoshida
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita 564-8680, Osaka, Japan
| | - Taiki Kumagae
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita 564-8680, Osaka, Japan
| | - Akinori Kuzuya
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita 564-8680, Osaka, Japan
- Kansai University Medical Polymer Research Center (KUMP-RC), Organization for Research and Development of Innovative Science and Technology (ORDIST), Kansai University, 3-3-35 Yamate, Suita 564-8680, Osaka, Japan
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Zhang X, Zhu R, Wang X, Wang H, Xu Z, Wang Y, Quan D, Shen L. Core-Shell Microspheres Prepared Using Coaxial Electrostatic Spray for Local Chemotherapy of Solid Tumors. Pharmaceutics 2023; 16:45. [PMID: 38258056 PMCID: PMC10820845 DOI: 10.3390/pharmaceutics16010045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/24/2024] Open
Abstract
Local chemotherapy is an alternative therapeutic strategy that involves direct delivery of drugs to the tumor site. This approach avoids adverse reactions caused by the systemic distribution of drugs and enhances the tumor-suppressing effect by concentrating the drugs at the tumor site. Drug-loaded microspheres are injectable sustained-release drug carriers that are highly suitable for local chemotherapy. However, a complex preparation process is one of the main technical difficulties limiting the development of microsphere formulations. In this study, core-shell structured microspheres loaded with paclitaxel (PTX; with a core-shell structure, calcium alginate outer layer, and a poly (lactic acid-co-glycolic acid) copolymer inner layer, denoted as PTX-CA/PLGA-MS) were prepared using coaxial electrostatic spray technology and evaluated in vitro and in vivo. PTX-CA/PLGA-MS exhibited a two-stage drug release profile and enhanced anti-tumor effect in animal tumor models. Importantly, the preparation method reported in this study is simple and reduces the amount of organic solvent(s) used substantially.
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Affiliation(s)
- Xiaowei Zhang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China; (X.Z.); (R.Z.); (X.W.); (H.W.); (Y.W.)
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China;
| | - Rundong Zhu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China; (X.Z.); (R.Z.); (X.W.); (H.W.); (Y.W.)
| | - Xingzhi Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China; (X.Z.); (R.Z.); (X.W.); (H.W.); (Y.W.)
| | - Hao Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China; (X.Z.); (R.Z.); (X.W.); (H.W.); (Y.W.)
| | - Zushun Xu
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China;
| | - Yongan Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China; (X.Z.); (R.Z.); (X.W.); (H.W.); (Y.W.)
| | - Dongqin Quan
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China; (X.Z.); (R.Z.); (X.W.); (H.W.); (Y.W.)
| | - Liao Shen
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China; (X.Z.); (R.Z.); (X.W.); (H.W.); (Y.W.)
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Fujiwara S, Yoshizaki Y, Kuzuya A, Ohya Y. Temperature-responsive biodegradable injectable polymers with tissue adhesive properties. Acta Biomater 2021; 135:318-330. [PMID: 34461346 DOI: 10.1016/j.actbio.2021.08.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 08/19/2021] [Accepted: 08/20/2021] [Indexed: 11/18/2022]
Abstract
Injectable polymers (IPs) exhibiting in situ hydrogel formation have attracted attention as vascular embolization and postoperative adhesion prevention materials. While utilizing hydrogels for such purposes, it is essential to ensure that they have appropriate and controllable tissue adhesion property, as it is crucial for them to not detach from their deposited location in the blood vessel or abdominal cavity. Additionally, it is important to maintain gel state in vivo for the desired period at such locations, where large amounts of body fluid exist. We had previously reported on a biodegradable IP system exhibiting temperature-responsive gelation and subsequent covalent cross-link formation. We had utilized triblock copolymers of aliphatic polyester and poly(ethylene glycol) (tri-PCGs) and its derivative containing acrylate group at the termini (tri-PCG-Acryl), exhibiting a longer and more controllable duration time of the gel state. In this study, the introduction of aldehyde groups by the addition of aldehyde-modified Pluronic (PL-CHO) was performed for conferring controllable and appropriate tissue adhesive properties on these IP systems. The IP systems containing PL-CHO, which were not covalently incorporated into the hydrogel network, exhibited tissue adhesive properties through Schiff base formation. The adhesion strength could be controlled by the amount of PL-CHO added. The IP system showed good vascular embolization performance and pressure resistance in the blood vessels. The IP hydrogel remained at the administration site in the abdominal space for 2 days and displayed effective adhesion prevention performance. STATEMENT OF SIGNIFICANCE: Injectable polymers (IPs), which exhibit in situ hydrogel formation, are expected to be utilized as vascular embolization and postoperative adhesion prevention materials. The tissue adhesion properties of hydrogels are important for such applications. We succeeded in conferring tissue adhesion properties onto a previously reported IP system by mixing it with Pluronic modified with aldehyde groups (PL-CHO). The aldehyde groups allowed for the formation of Schiff bases at the tissue surfaces. The tissue adhesion property could be conveniently controlled by altering the amount of PL-CHO. We revealed that the in vitro embolization properties of IPs in blood vessels could be substantially improved by mixing with PL-CHO. The IP system containing PL-CHO also exhibited good in vivo performance for postoperative adhesion prevention.
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Affiliation(s)
- Soichiro Fujiwara
- Faculty of Chemistry, Materials, and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
| | - Yuta Yoshizaki
- Organization for Research and Development of Innovative Science and Technology (ORDIST), Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
| | - Akinori Kuzuya
- Faculty of Chemistry, Materials, and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan; Kansai University Medical Polymer Research Center (KUMP-RC), Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
| | - Yuichi Ohya
- Faculty of Chemistry, Materials, and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan; Kansai University Medical Polymer Research Center (KUMP-RC), Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan.
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Liu M, Wu C, Ke L, Li Z, Wu YL. Emerging Biomaterials-Based Strategies for Inhibiting Vasculature Function in Cancer Therapy. SMALL METHODS 2021; 5:e2100347. [PMID: 34927997 DOI: 10.1002/smtd.202100347] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/20/2021] [Indexed: 06/14/2023]
Abstract
The constant feeding of oxygen and nutrients through the blood vasculature has a vital role in maintaining tumor growth. Interestingly, recent endeavors have shown that nanotherapeutics with the strategy to block tumor blood vessels feeding nutrients and oxygen for starvation therapy can be helpful in cancer treatment. However, this field has not been detailed. Hence, this review will present an exhaustive summary of the existing biomaterial based strategies to disrupt tumor vascular function for effective cancer treatment, including hydrogel or nanogel-mediated local arterial embolism, thrombosis activator loaded nano-material-mediated vascular occlusion and anti-vascular drugs that block tumor vascular function, which may be beneficial to the design of anti-cancer nanomedicine by targeting the tumor vascular system.
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Affiliation(s)
- Minting Liu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Caisheng Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Lingjie Ke
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Zhiguo Li
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Yun-Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
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5
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Temperature-responsive biodegradable injectable polymer systems with conveniently controllable properties. Polym J 2019. [DOI: 10.1038/s41428-019-0217-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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6
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PEGylated polylactide (PLA) and poly (lactic-co-glycolic acid) (PLGA) copolymers for the design of drug delivery systems. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2019. [DOI: 10.1007/s40005-019-00442-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Yoshida Y, Takai H, Kawahara K, Mitsumune S, Takata K, Kuzuya A, Ohya Y. Biodegradable injectable polymer systems exhibiting a longer and controllable duration time of the gel state. Biomater Sci 2018; 5:1304-1314. [PMID: 28594018 DOI: 10.1039/c7bm00357a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Here, we report biodegradable temperature-triggered covalent gelation systems exhibiting a longer and controllable duration time of the gel state by a "mixing strategy" utilizing a thiol-ene reaction. We synthesized a tri-block copolymer of poly(caprolactone-co-glycolic acid) and PEG (tri-PCG) as a temperature-responsive injectable polymer (IP) and attached acryloyl groups on both termini (tri-PCG-Acryl). A tri-PCG micelle solution containing hydrophobic hexa-functional polythiol (Solution-A) and a tri-PCG-Acryl micelle solution (Solution-B) were mixed together. After mixing, the solution was still in the sol state at r.t., but exhibited an irreversible sol-to-gel transition in response to temperature. The duration time of the gel state while soaking in PBS could be altered from 1 day to 93 days by changing the mixing ratio of Solution-A/B. The physical strengths of the hydrogels were also controllable by changing the mixing ratio. The IP system showed good biocompatibility and a long duration time of the gel state after subcutaneous implantation.
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Affiliation(s)
- Yasuyuki Yoshida
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan.
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Tian L, Gao J, Yang Z, Zhang Z, Huang G. Tamibarotene-Loaded PLGA Microspheres for Intratumoral Injection Administration: Preparation and Evaluation. AAPS PharmSciTech 2018; 19:275-283. [PMID: 28702817 DOI: 10.1208/s12249-017-0827-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 05/31/2017] [Indexed: 02/04/2023] Open
Abstract
Tamibarotene (Am80) has good curative effect on advanced hepatocellular carcinoma (HCC). To improve the therapeutic efficacy furtherly, we prepared tamibarotene-loaded PLGA microspheres (Am80-PLGA-MS) for intratumoral injection. Firstly, Am80-PLGA-MS were prepared by emulsion-solvent evaporation method. Subsequently, microspheres were characterized by particle size analysis, drug loading (DL), and entrapment efficiency (EE). Finally, the drug release characteristics in vitro, pharmacokinetic, and pharmacodynamics were studied separately. According to results obtained, microspheres were spherical with a uniform particle size 7.04 ± 0.03 μm and its EE and DL were 82.23 ± 0.74 and 11.74 ± 0.11%, respectively. In vitro, Am80-PLGA-MS can release drug for 14 days and its release behavior was fitted with the Higuchi equation. In pharmacokinetic studies, the t1/2β, MRT, and AUC of microspheres were 15.43-fold, 8.62-fold, and 9.98-fold those of Am80 solution, respectively, which revealed that the utilization of drug was improved obviously. The pharmacodynamics studies showed that the tumor doubling time, growth inhibition rate, and specific growth rate of tumor of Am80-PLGA-MS were 1.34 times, 2.63 times, and 0.72 times those of drug solution, respectively, indicating that the inhibitory effect on tumor by the microspheres was significantly improved. In summary, Am80-PLGA-MS are promising carrier to enhance the inhibitory effect on tumor, which will provide significantly clinical value for treatment of HCC.
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Yoshida Y, Kawahara K, Inamoto K, Mitsumune S, Ichikawa S, Kuzuya A, Ohya Y. Biodegradable Injectable Polymer Systems Exhibiting Temperature-Responsive Irreversible Sol-to-Gel Transition by Covalent Bond Formation. ACS Biomater Sci Eng 2016; 3:56-67. [PMID: 33429686 DOI: 10.1021/acsbiomaterials.6b00581] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Biodegradable injectable polymer (IP) systems exhibiting temperature-responsive sol-to-gel transitions between room temperature and body temperature have the potential for use in biomedical applications. However, gelation of such IP systems is a reversible process through physical cross-linking, and the hydrogels thus formed are likely to revert to the sol state under highly wet conditions after injection. In this study, a biodegradable IP system exhibiting temperature-responsive irreversible sol-to-gel transition by covalent bond formation was developed by simple mixing of polymers. A triblock copolymer of poly(caprolactone-co-glycolic acid) and poly(ethylene glycol) (tri-PCG) and tri-PCG with attached succinimide ester groups at both termini (tri-PCG-SA-OSu) were prepared and mixed together with a water-soluble polyamine (typically poly-l-lysine). The obtained IP formulation was in the sol state after mixing, but exhibited a rapid sol-to-gel transition within 30 s upon increasing the temperature to 37 °C. Once formed, the hydrogel did not revert to the sol state, even after cooling to 4 °C, because of the formation of covalent bonds upon transition. The obtained hydrogel soaked in phosphate buffered saline (PBS) exhibited a significantly longer duration time of the gel state. This IP system exhibiting a rapid and irreversible sol-to-gel transition is convenient for medical professionals and possesses great potential for use in biomedical devices for clinical applications such as drug delivery systems and antiadhesive materials.
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Affiliation(s)
- Yasuyuki Yoshida
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
| | - Keisuke Kawahara
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
| | - Kenta Inamoto
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
| | - Shintaro Mitsumune
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
| | - Shinya Ichikawa
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
| | - Akinori Kuzuya
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan.,PREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
| | - Yuichi Ohya
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan
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Kondiah PJ, Choonara YE, Kondiah PPD, Marimuthu T, Kumar P, du Toit LC, Pillay V. A Review of Injectable Polymeric Hydrogel Systems for Application in Bone Tissue Engineering. Molecules 2016; 21:E1580. [PMID: 27879635 PMCID: PMC6272998 DOI: 10.3390/molecules21111580] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 10/24/2016] [Accepted: 11/16/2016] [Indexed: 11/16/2022] Open
Abstract
Biodegradable, stimuli-responsive polymers are essential platforms in the field of drug delivery and injectable biomaterials for application of bone tissue engineering. Various thermo-responsive hydrogels display water-based homogenous properties to encapsulate, manipulate and transfer its contents to the surrounding tissue, in the least invasive manner. The success of bioengineered injectable tissue modified delivery systems depends significantly on their chemical, physical and biological properties. Irrespective of shape and defect geometry, injectable therapy has an unparalleled advantage in which intricate therapy sites can be effortlessly targeted with minimally invasive procedures. Using material testing, it was found that properties of stimuli-responsive hydrogel systems enhance cellular responses and cell distribution at any site prior to the transitional phase leading to gelation. The substantially hydrated nature allows significant simulation of the extracellular matrix (ECM), due to its similar structural properties. Significant current research strategies have been identified and reported to date by various institutions, with particular attention to thermo-responsive hydrogel delivery systems, and their pertinent focus for bone tissue engineering. Research on future perspective studies which have been proposed for evaluation, have also been reported in this review, directing considerable attention to the modification of delivering natural and synthetic polymers, to improve their biocompatibility and mechanical properties.
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Affiliation(s)
- Pariksha J Kondiah
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Yahya E Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Pierre P D Kondiah
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Thashree Marimuthu
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Pradeep Kumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Lisa C du Toit
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
| | - Viness Pillay
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa.
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Nakka R, Mungray AA. Biodegradable and biocompatible temperature sensitive triblock copolymer hydrogels as draw agents for forward osmosis. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2016.05.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Embolization biomaterial reinforced with nanotechnology for an in-situ release of anti-angiogenic agent in the treatment of hyper-vascularized tumors and arteriovenous malformations. Eur J Pharm Biopharm 2015; 96:396-408. [DOI: 10.1016/j.ejpb.2015.09.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 09/08/2015] [Accepted: 09/09/2015] [Indexed: 12/28/2022]
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Shih YH, Lin XZ, Yeh CH, Peng CL, Shieh MJ, Lin WJ, Luo TY. Preparation and therapeutic evaluation of (188)Re-thermogelling emulsion in rat model of hepatocellular carcinoma. Int J Nanomedicine 2014; 9:4191-201. [PMID: 25214783 PMCID: PMC4159399 DOI: 10.2147/ijn.s66346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Radiolabeled Lipiodol® (Guerbet, Villepinte, France) is routinely used in hepatoma therapy. The temperature-sensitive hydrogel polyethylene glycol-b-poly-DL-lactic acid-co-glycolic acid-b-polyethylene glycol triblock copolymer is used as an embolic agent and sustained drug release system. This study attempted to combine the polyethylene glycol-b-poly-DL-lactic acid-co-glycolic acid-b-polyethylene glycol hydrogel and radio-labeled Lipiodol to form a new radio-thermogelling emulsion, rhenium-188–N,N’-1,2-ethanediylbis-L-cysteine diethyl-ester dihydrochloride–Lipiodol/hydrogel (188Re-ELH). The therapeutic potential of 188Re-ELH was evaluated in a rodent hepatoma model. Rhenium-188 chelated with N,N’-1,2-ethanediylbis-L-cysteine diethyl-ester dihydrochloride was extracted with Lipiodol to obtain rhenium-188–N,N’-1,2-ethanediylbis-L-cysteine diethyl-ester dihydrochloride–Lipiodol (188Re-EL), which was blended with the hydrogel in equal volumes to develop 188Re-ELH. The 188Re-ELH phase stability was evaluated at different temperatures. Biodistribution patterns and micro-single-photon emission computed tomography/computed tomography images in Sprague Dawley rats implanted with the rat hepatoma cell line N1-S1 were observed after in situ tumoral injection of ~3.7 MBq 188Re-ELH. The therapeutic potential of 188Re-EL (48.58±3.86 MBq/0.1 mL, n=12) was evaluated in a 2-month survival study using the same animal model. The therapeutic effects of 188Re-ELH (25.52±4.64 MBq/0.1 mL, n=12) were evaluated and compared with those of 188Re-EL. The responses were assessed by changes in tumor size and survival rates. The 188Re-ELH emulsion was stable in the gel form at 25°C–35°C for >52 hours. Biodistribution data and micro-single-photon emission computed tomography/computed tomography images of the 188Re-ELH group indicated that most activity was selectively observed in hepatomas. Long-term 188Re-ELH studies have demonstrated protracted reductions in tumor volumes and positive effects on the survival rates (75%) of N1-S1 hepatoma-bearing rats. Conversely, the 2-month survival rate was 13% in the control sham group. Therapeutic responses differed significantly between the two groups (P<0.005). Thus, the hydrogel enhanced the injection stability of 188Re-EL in an animal hepatoma model. Given the synergistic results, direct 188Re-ELH intratumoral injection is a potential therapeutic alternative for hepatoma treatment.
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Affiliation(s)
- Ying-Hsia Shih
- Isotope Application Division, Institute of Nuclear Energy Research, Longtan, Taiwan ; Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Xi-Zhang Lin
- Department of Internal Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chung-Hsin Yeh
- Isotope Application Division, Institute of Nuclear Energy Research, Longtan, Taiwan
| | - Cheng-Liang Peng
- Isotope Application Division, Institute of Nuclear Energy Research, Longtan, Taiwan ; Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Ming-Jium Shieh
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan ; Department of Oncology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Wuu-Jyh Lin
- Isotope Application Division, Institute of Nuclear Energy Research, Longtan, Taiwan
| | - Tsai-Yueh Luo
- Isotope Application Division, Institute of Nuclear Energy Research, Longtan, Taiwan ; Institute of Radiological Science, Central Taiwan University of Science and Technology, Taichung, Taiwan
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14
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Wang K, Buschle-Diller G, Wu Y. Thermoresponsive hydrogels from BSA esterified with low molecular weight PEG. J Appl Polym Sci 2014. [DOI: 10.1002/app.40946] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Kai Wang
- Department of Polymer and Fiber Engineering; Auburn University; Auburn Alabama 36849-5327
| | - Gisela Buschle-Diller
- Department of Polymer and Fiber Engineering; Auburn University; Auburn Alabama 36849-5327
| | - Yonnie Wu
- Department of Chemistry and Biochemistry; Auburn University; Auburn Alabama 36849-5312
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Oh MH, Kim JS, Lee JY, Park TG, Nam YS. Radio-opaque theranostic nanoemulsions with synergistic anti-cancer activity of paclitaxel and Bcl-2 siRNA. RSC Adv 2013. [DOI: 10.1039/c3ra40883c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Liu Y, Sun J, Cao W, Yang J, Lian H, Li X, Sun Y, Wang Y, Wang S, He Z. Dual targeting folate-conjugated hyaluronic acid polymeric micelles for paclitaxel delivery. Int J Pharm 2011; 421:160-9. [PMID: 21945183 DOI: 10.1016/j.ijpharm.2011.09.006] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 09/04/2011] [Accepted: 09/11/2011] [Indexed: 12/18/2022]
Abstract
A series of novel self-assembled hyaluronic acid derivatives (HA-C(18)) grafted with hydrophobic octadecyl moiety and further dual targeting folic acid-conjugated HA-C(18) (FA-HA-C(18)) were synthesized. With the increase in the degree of substitution of octadecyl group from 12.7% to 19.3%, the critical micellar concentration of HA-C(18) copolymers decreased from 37.3 to 10.0 μg/mL. Paclitaxel (PTX) was successfully encapsulated into the hydrophobic cores of the HA-C(18) and FA-HA-C(18) micelles, with encapsulation efficiency as high as 97.3%. The physicochemical properties of the polymeric micelles were measured by DLS, TEM and DSC. Moreover, in vitro release behavior of PTX was investigated by dialysis bag method and PTX was released from micelles in a near zero-order sustained manner. In vitro antitumor activity tests suggested PTX-loaded HA-C(18) and FA-HA-C(18) micelles exhibited significantly higher cytotoxic activity against MCF-7 and A549 cells compared to Taxol at a lower PTX concentration. The cellular uptake experiments were conducted by quantitative assay of PTX cellular accumulation and confocal laser scanning microscopy imaging of coumarin-6 labeled HA-C(18) and FA-HA-C(18) micelles in folate receptor overexpressing MCF-7 cells. Folate and CD44 receptor competitive inhibition studies performed by fluorescence microscopy imaging suggested intracellular delivery of HA-C(18) and FA-HA-C(18) micelles were efficiently taken up via CD44 receptor-mediated endocytosis. The folate receptor-mediated endocytosis further enhanced internalized amounts of FA-HA-C(18) micelles in MCF-7 cells, as compared with HA-C(18) micelles. The internalization pathways of PTX-loaded HA-C(18) and FA-HA-C(18) micelles might include clathrin-mediated endocytosis, caveolae-mediated endocytosis and macropinocytosis. Therefore, the present study suggested that HA-C(18) and FA-HA-C(18) copolymers as biodegradable, biocompatible and cell-specific targetable nanostructure carriers, are promising nanosystems for cellular and intracellular targeting delivery of hydrophobic anticancer drugs.
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Affiliation(s)
- Yanhua Liu
- Department of Biopharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, China
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Mishra GP, Tamboli V, Mitra AK. Effect of hydrophobic and hydrophilic additives on sol-gel transition and release behavior of timolol maleate from polycaprolactone-based hydrogel. Colloid Polym Sci 2011; 289:1553-1562. [PMID: 21892247 DOI: 10.1007/s00396-011-2476-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The objective of this work was to delineate the effect of hydrophilic and hydrophobic polymeric additives on sol-gel transition and release profile of timolol maleate (TM) from poly (ethylene glycol)-poly (ε-caprolactone)- poly (ethylene glycol) (PEG-PCL-PEG)-based thermosensitive hydrogel. Polycaprolactone (hydrophobic additive) and polyvinyl alcohol (PVA) (hydrophilic additive) reduced critical gel concentration of PEG-PCL-PEG triblock polymer. The effect of PCL on sol-gel transition was more pronounced than PVA. However, with PCL no statistically significant difference in release profile was observed. The effect of PVA on release profile was more pronounced, which reduced the cumulative percentage release of TM from 86.4±0.8% to 73.7±1.8% over 316 h. Moreover, cytotoxicity of the hydrogel was also investigated utilizing rabbit primary corneal epithelial culture cells. No significant cytotoxicity of hydrogel alone or in presence of additives was observed. So, polymeric additive strategy serves as a valuable tool for optimizing TM release kinetics from PEG-PCL-PEG hydrogel matrix.
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Affiliation(s)
- Gyan P Mishra
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, 2464 Charlotte Street, Kansas City, MO 64108-2718, USA
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Guillot S, Tomšič M, Sagalowicz L, Leser ME, Glatter O. Internally self-assembled particles entrapped in thermoreversible hydrogels. J Colloid Interface Sci 2009; 330:175-9. [DOI: 10.1016/j.jcis.2008.10.065] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Revised: 10/15/2008] [Accepted: 10/16/2008] [Indexed: 11/15/2022]
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21
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Joo MK, Park MH, Choi BG, Jeong B. Reverse thermogelling biodegradable polymer aqueous solutions. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b902208b] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Horák D, Galibin IE, Adamyan AA, Sitnikov AV, Dan VN, Titova MI, Shafranov VV, Isakov YF, Gumargalieva KZ, Vinokurova TI. Poly(2-hydroxyethyl methacrylate) emboli with increased haemostatic effect for correction of haemorrhage of complex origin in endovascular surgery of children. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:1265-74. [PMID: 17705055 DOI: 10.1007/s10856-007-3236-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2006] [Accepted: 07/05/2007] [Indexed: 05/16/2023]
Abstract
Poly(2-hydroxyethyl methacrylate) (PHEMA) embolization particles with enhanced haemostatic properties were prepared by bulk or suspension polymerisation of 2-hydroxyethyl methacrylate (HEMA) followed by particle soaking in ethamsylate solution. The particles accelerated thrombus formation as evidenced by blood analysis of rabbits with implanted emboli. Usefulness of both spherical and cylindrical PHEMA particles with enhanced haemostatic effect was demonstrated on the embolization of arterial anastomosis, fistulas of the lower extremity and abdominal cavity, haemangioma and arteriovenous malformation of the head of several children.
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Affiliation(s)
- Daniel Horák
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, Prague 6, 162 06, Czech Republic.
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23
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Zhang C, Qu G, Sun Y, Wu X, Yao Z, Guo Q, Ding Q, Yuan S, Shen Z, Ping Q, Zhou H. Pharmacokinetics, biodistribution, efficacy and safety of N-octyl-O-sulfate chitosan micelles loaded with paclitaxel. Biomaterials 2008; 29:1233-41. [DOI: 10.1016/j.biomaterials.2007.11.029] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Accepted: 11/12/2007] [Indexed: 10/22/2022]
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Bae KH, Lee Y, Park TG. Oil-encapsulating PEO-PPO-PEO/PEG shell cross-linked nanocapsules for target-specific delivery of paclitaxel. Biomacromolecules 2007; 8:650-6. [PMID: 17291088 DOI: 10.1021/bm0608939] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PEO-PPO-PEO/PEG shell cross-linked nanocapsules encapsulating an oil phase in their nanoreservoir structure was developed as a target-specific carrier for a water-insoluble drug, paclitaxel. Oil-encapsulating PEO-PPO-PEO/PEG composite nanocapsules were synthesized by dissolving an oil (Lipiodol) and an amine-reactive PEO-PPO-PEO derivative in dichloromethane and subsequently dispersing in an aqueous solution containing amine-functionalized six-arm-branched poly(ethylene glycol) by ultrasonication. The resultant shell cross-linked nanocapsules had a unique core/shell architecture with an average size of 110.7 +/- 9.9 nm at 37 degrees C, as determined by dynamic light scattering and transmission electron microscopy. Paclitaxel could be effectively solubilized in the inner Lipiodol phase surrounded by a cross-linked PEO-PPO-PEO/PEG shell layer. The paclitaxel-loaded nanocapsules were further conjugated with folic acid to achieve folate receptor targeted delivery. Confocal microscopy and flow cytometric analysis revealed that folate-mediated targeting significantly enhanced the cellular uptake and apoptotic effect against folate receptor overexpressing cancer cells. The present study suggested that these novel nanomaterials encapsulating an oil reservoir could be potentially applied for cancer cell targeted delivery of various water-insoluble therapeutic and diagnostic agents.
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Affiliation(s)
- Ki Hyun Bae
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea
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Lapitsky Y, Kaler EW. Surfactant and polyelectrolyte gel particles for encapsulation and release of aromatic oils. SOFT MATTER 2006; 2:779-784. [PMID: 32680218 DOI: 10.1039/b607910e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Associative phase separation occurs when oppositely charged surfactants and polyelectrolytes are mixed in near-stoichiometric proportions. This behavior has been exploited in the production of gel particles that range between approximately 100 and 4000 µm in diameter. Here, we investigate their performance as materials for the encapsulation and release of the aromatic oil cymene. The gel particles ( 1500 µm in diameter) are prepared by dropwise addition of an oil-in-water suspension made of cymene droplets dispersed in a viscous solution of sodium dodecyl sulfate (SDS) and ,,-trimethylammonium derivatized hydroxyethyl cellulose (JR-400) to a gelling solution of excess SDS. The release of cymene into aqueous (5 wt.% SDS and 4 wt.% pentanol in water) and organic (isooctane) solutions is measured using UV-VIS spectroscopy and analyzed with the shrinking core model. The experimental data and model analysis indicate that the release rate is determined by the effective diffusivity and solubility of the oil in the aqueous gel matrix, both of which depend on the presence of surfactant in the receiving solution, and the swelling of the gel particle.
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Affiliation(s)
- Yakov Lapitsky
- Center for Molecular and Engineering Thermodynamics, Department of Chemical Engineering, University of Delaware, Newark, DE, USA.
| | - Eric W Kaler
- Center for Molecular and Engineering Thermodynamics, Department of Chemical Engineering, University of Delaware, Newark, DE, USA.
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. LJ, . WB, . WY. Thermo-sensitive Polymers for Controlled-release Drug Delivery Systems. INT J PHARMACOL 2006. [DOI: 10.3923/ijp.2006.513.519] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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