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Giliomee J, du Toit LC, Kumar P, Klumperman B, Choonara YE. Evaluation of Composition Effects on the Physicochemical and Biological Properties of Polypeptide-Based Hydrogels for Potential Application in Wound Healing. Polymers (Basel) 2021; 13:polym13111828. [PMID: 34073003 PMCID: PMC8198873 DOI: 10.3390/polym13111828] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/27/2021] [Accepted: 05/27/2021] [Indexed: 11/22/2022] Open
Abstract
In this study, the effect of crosslinking and concentration on the properties of a new library of low-concentration poly(Lys60-ran-Ala40)-based hydrogels for potential application in wound healing was investigated in order to correlate the hydrogel composition with the desired physicochemical and biofunctional properties to expand the assortment of poly-l-lysine (PLL)-based hydrogels suitable for wound healing. Controlled ring-opening polymerization (ROP) and precise hydrogel compositions were used to customize the physicochemical and biofunctional properties of a library of new hydrogels comprising poly(l-lysine-ran-l-alanine) and four-arm poly(ethylene glycol) (P(KA)/4-PEG). The chemical composition and degree of crosslinking via free amine quantification were analyzed for the P(KA)/4-PEG hydrogels. In addition, the rheological properties, pore morphology, swelling behavior and degradation time were characterized. Subsequently, in vitro cell studies for evaluation of the cytotoxicity and cell adhesion were performed. The 4 wt% 1:1 functional molar ratio hydrogel with P(KA) concentrations as low as 0.65 wt% demonstrated low cytotoxicity and desirable cell adhesion towards fibroblasts and thus displayed a desirable combination of properties for wound healing application.
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Affiliation(s)
- Johnel Giliomee
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, Faculty of Health Sciences, School of Therapeutic Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa; (J.G.); (L.C.d.T.); (P.K.)
| | - Lisa C. du Toit
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, Faculty of Health Sciences, School of Therapeutic Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa; (J.G.); (L.C.d.T.); (P.K.)
| | - Pradeep Kumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, Faculty of Health Sciences, School of Therapeutic Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa; (J.G.); (L.C.d.T.); (P.K.)
| | - Bert Klumperman
- Department of Chemistry and Polymer Science, Faculty of Science, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa;
| | - Yahya E. Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, Faculty of Health Sciences, School of Therapeutic Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown 2193, South Africa; (J.G.); (L.C.d.T.); (P.K.)
- Correspondence: ; Tel.: +27-11-717-2052
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Updates on thermosensitive hydrogel for nasal, ocular and cutaneous delivery. Int J Pharm 2019; 559:86-101. [PMID: 30677480 DOI: 10.1016/j.ijpharm.2019.01.030] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/02/2019] [Accepted: 01/10/2019] [Indexed: 12/15/2022]
Abstract
Thermosensitive hydrogels are in situ gelling systems composed of hydrophilic homopolymers or block copolymers which remain as solutions at room temperature and form gels after administration into the body. Its application in advanced drug delivery has gained significant attention in recent years. The tunable characteristics of thermosensitive hydrogels make them versatile and capable of incorporating both hydrophilic and lipophilic compounds and macromolecules. The drug molecules can be included as free molecules or preformulated into nano- or micro-particles or liposomes. Although there were several reviews on the materials of thermosensitive hydrogels, the compatibility between the drug and thermosensitive material as well as its in vitro release mechanisms and in vivo performance have barely been investigated. The current review is proposed aiming to not only provide an update on the recent development in thermosensitive hydrogel formulations for nasal, ocular and cutaneous deliveries, but also identify the relationship between the drug characteristics and the loading strategies, and their impacts on the release mechanisms and the in vivo performance. Our current update for the first time highlights the essential features for successful development of in situ thermosensitive hydrogels to facilitate nasal, ocular or cutaneous drug deliveries.
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Wang Q, Sun C, Xu B, Tu J, Shen Y. Synthesis, physicochemical properties and ocular pharmacokinetics of thermosensitive in situ hydrogels for ganciclovir in cytomegalovirus retinitis treatment. Drug Deliv 2018; 25:59-69. [PMID: 29228826 PMCID: PMC6058567 DOI: 10.1080/10717544.2017.1413448] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Ganciclovir (GCV) is one of the most widely used antiviral drugs for the treatment of cytomegalovirus (CMV) retinitis. In this context, the aim of this study was to design in situ thermosensitive hydrogels for GCV ocular delivery by intravitreal injection to achieve sustained drug release behavior and improved ocular bioavailability in the treatment of CMV retinitis. A thermosensitive poly-(β-butyrolactone-co-lactic acid)-polyethylene glycol-poly (β-butyrolactone-co-lactic acid) (PBLA-PEG-PBLA) triblock copolymer was synthesized by ring-opening polymerization and characterization. The GCV-loaded PBLA-PEG-PBLA in situ hydrogels (15%, w/w) were then prepared with drug concentration at 2 mg·mL-1 and the gelation temperatures, rheological properties, in vitro degradation and syringeability of in situ hydrogels for intravitreal injection were also investigated. Membraneless dissolution model was used to explore drug release behavior of PBLA-PEG-PBLA in situ hydrogel. The results indicated that more than 45 and 85% of GCV can be released within 24 and 96 h, respectively, which was verified by a non-Fickian diffusion mechanism. In vivo ocular pharmacokinetics study showed that area under drug-time curve (AUC) and half-life of PBLA-PEG-PBLA in situ hydrogel was higher (AUC was 61.80 μg·mL-1·h (p < .01) and t1/2 was 10.29 h in aqueous humor; AUC was 1008.66 μg·mL-1·h (p < .01) and t1/2 was 13.26 h (p < .01) in vitreous) than GCV injection with extended therapeutic activity. Based on obtained results, it was concluded that the thermosenstive PBLA-PEG-PBLA in situ hydrogel is a promising carrier of GCV for intravitreal injection.
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Affiliation(s)
- Qiyue Wang
- a Center for Research Development and Evaluation of Pharmaceutical Excipients and Generic Drugs, Department of Pharmaceutics , China Pharmaceutical University , Nanjing , China
| | - Chunmeng Sun
- a Center for Research Development and Evaluation of Pharmaceutical Excipients and Generic Drugs, Department of Pharmaceutics , China Pharmaceutical University , Nanjing , China
| | - Bohui Xu
- b School of Pharmacy , Nantong University , Nantong , China
| | - Jiasheng Tu
- a Center for Research Development and Evaluation of Pharmaceutical Excipients and Generic Drugs, Department of Pharmaceutics , China Pharmaceutical University , Nanjing , China
| | - Yan Shen
- a Center for Research Development and Evaluation of Pharmaceutical Excipients and Generic Drugs, Department of Pharmaceutics , China Pharmaceutical University , Nanjing , China
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Wu J, Lu S, Zheng Z, Zhu L, Zhan X. Modification with polysialic acid–PEG copolymer as a new method for improving the therapeutic efficacy of proteins. Prep Biochem Biotechnol 2016; 46:788-797. [DOI: 10.1080/10826068.2015.1135463] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Jianrong Wu
- Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Shaozeng Lu
- Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Zhiyong Zheng
- Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Li Zhu
- Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiaobei Zhan
- Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
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Peng KT, Hsieh MY, Lin CT, Chen CF, Lee MS, Huang YY, Chang PJ. Treatment of critically sized femoral defects with recombinant BMP-2 delivered by a modified mPEG-PLGA biodegradable thermosensitive hydrogel. BMC Musculoskelet Disord 2016; 17:286. [PMID: 27421654 PMCID: PMC4946224 DOI: 10.1186/s12891-016-1131-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 06/23/2016] [Indexed: 11/23/2022] Open
Abstract
Background Reconstruction of a segmental fracture with massive bone loss is still a challenge for orthopaedic surgeons. The aim of our study was to develop a suitable biodegradable thermosensitive hydrogel system as a carrier for bone morphogenetic protein (BMP)-2 delivery in the treatment of critical-sized femoral defects. Methods A block copolymer composed of monomethoxypoly(ethylene glycol) (mPEG), poly(lactic-co-glycolic acid) (PLGA) and 2, 2’-Bis (2-oxazolin) (Box) was synthesized by ring opening polymerization. The synthesized block copolymer was characterized by 1H-NMR spectroscopy and gel permeation chromatography (GPC). Different biophysical and biochemical properties of the synthesized copolymer, including temperature-induced structure changes, degradation rate, pH changes during hydrolytic degradation, cell toxicity, and the release profile of BMP-2, were also evaluated and/or were compared with those of a well-characterized mPEG-PLGA copolymer. In animal testing, rabbits (n = 36) that received critically sized (10 mm) femoral defects were divided into 6 groups. These experimental groups included an untreated group, autograft, and groups treated with the synthesized copolymer carrying different concentrations of BMP-2 (0, 5, 10, and 20 μg/ml). Bone repair was evaluated using X-ray radiography, histological staining, micro-computed tomography (μCT), biomarker examination and biomechanical testing in a 12-week treatment period. Results A new thermosensitive mPEG-PLGA/Box/mPEG-PLGA block copolymer, or named as BOX copolymer, was successfully prepared. Compared to the reported mPEG-PLGA in vitro, the prepared BOX copolymer at the same weight percent concentrations exhibited wider temperature ranges of gelation, slower degradation rates, higher the pH values, as well as less cytotoxicity. Furthermore, the BMP-2 release from BOX hydrogel exhibited a near-linear release profile in vitro. In animal experiments, treatment of critical-sized bony defects with 25 wt% BOX hydrogel carrying BMP-2 effectively promoted fracture healing during the 12-week trial period and higher concentrations of BMP-2 treatment correlated with better bone quality. Most importantly, clinical outcome and bone healing in the BOX-hydrogel group with 20 μg/ml BMP-2 were nearly equivalent to those in the autograft group in a 12-week treatment course. Conclusion These data support that the use of BOX hydrogel (25 wt%) as a drug delivery system is a promising method in the treatment of large bone defects.
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Affiliation(s)
- Kuo-Ti Peng
- Division of Joint Reconstruction, Department of Orthopedic Surgery, Chang-Gung Memorial Hospital, Chiayi, Taiwan.,College of Medicine, Chang-Gung University, Taoyuan, Taiwan
| | - Meng-Yow Hsieh
- Institute of Biomedical Engineering, College of Engineering, College of Medicine, National Taiwan University, No. 1, Sec. 1, Jen-Ai Road, Taipei, Taiwan.,Biomedical Technology and Device Research Labs, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Carl T Lin
- Biomedical Technology and Device Research Labs, Industrial Technology Research Institute, Hsinchu, Taiwan.,Department of Chemical Engineering, National Tsing-Hua University, Hsinchu, Taiwan
| | - Chin-Fu Chen
- Biomedical Technology and Device Research Labs, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Mel S Lee
- Division of Joint Reconstruction, Department of Orthopedic Surgery, Chang-Gung Memorial Hospital, Chiayi, Taiwan.,College of Medicine, Chang-Gung University, Taoyuan, Taiwan
| | - Yi-You Huang
- Institute of Biomedical Engineering, College of Engineering, College of Medicine, National Taiwan University, No. 1, Sec. 1, Jen-Ai Road, Taipei, Taiwan.
| | - Pey-Jium Chang
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang-Gung University, Taoyuan, Taiwan. .,Department of Nephrology, Chang-Gung Memorial Hospital, Chiayi, Taiwan. .,Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang-Gung University, 6 West, Chia-Pu Road, Puzi City, Chiayi, 613, Taiwan.
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Ishii S, Kaneko J, Nagasaki Y. Development of a long-acting, protein-loaded, redox-active, injectable gel formed by a polyion complex for local protein therapeutics. Biomaterials 2016; 84:210-218. [PMID: 26828685 DOI: 10.1016/j.biomaterials.2016.01.029] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 01/09/2016] [Accepted: 01/15/2016] [Indexed: 11/20/2022]
Abstract
Although cancer immunotherapies are attracting much attention, it is difficult to develop bioactive proteins owing to the severe systemic toxicity. To overcome the issue, we designed new local protein delivery system by using a protein-loaded, redox-active, injectable gel (RIG), which is formed by a polyion complex (PIC) comprising three components, viz., cationic polyamine-poly(ethylene glycol)-polyamine triblock copolymer possessing ROS-scavenging moieties as side chains; anionic poly(acrylic acid); and a protein. The mixture formed the protein-loaded PIC flower micelles at room temperature, which immediately converted to a gel with high mechanical strength upon exposure to physiological conditions. Because the protein electrostatically interacts with the PIC gel network, RIG provided a sustained release of the protein without a significant initial burst, regardless of the types of proteins in vitro, and much longer retention of the protein at the local injection site in mice than that of the naked protein. Subcutaneous injections of IL-12@RIG in the vicinity of tumor tissue showed remarkable tumor growth inhibition in tumor-bearing mice, compared to that observed with injection of IL-12 alone, suppressing adverse events caused by IL-12-induced ROS. Our results indicate that RIG has potential as a platform technology for an injectable sustained-release carrier for proteins.
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Affiliation(s)
- Shiro Ishii
- Department of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573, Japan
| | - Junya Kaneko
- Department of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573, Japan
| | - Yukio Nagasaki
- Department of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573, Japan; Master's School of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573, Japan; Satellite Laboratory, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573, Japan.
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Gumel AM, Razaif-Mazinah MRM, Anis SNS, Annuar MSM. Poly (3-hydroxyalkanoates)-co-(6-hydroxyhexanoate) hydrogel promotes angiogenesis and collagen deposition during cutaneous wound healing in rats. ACTA ACUST UNITED AC 2015; 10:045001. [PMID: 26154416 DOI: 10.1088/1748-6041/10/4/045001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Wound management and healing in several physiological or pathological conditions, particularly when comorbidities are involved, usually proves to be difficult. This presents complications leading to socio-economic and public health burdens. The accelerative wound healing potential of biocompatible poly(3-hydroxyalkanoates)-co-(6-hydroxyhexanoate) (PHA-PCL) composite hydrogel is reported herein. The biosynthesized PHA-PCL macromer was cross-linked with PEGMA to give a hydrogel. Twenty-four rats weighing 200-250 g each were randomly assigned to four groups of six rats. Rats in group I (negative control) were dressed with sterilized gum acacia paste in 10% normal saline while PEGMA-alone hydrogel (PH) was used to dress group II (secondary control) rats. Group III rats were dressed with PHAs-PCL cross-linked PEGMA hydrogel (PPH). For the positive control (group IV), the rats were dressed with Intrasite(®) gel. Biochemical, histomorphometric and immunohistomorphometric analyses revealed a significant difference in area closure and re-epithelialization on days 7 and 14 in PPH or Intrasite(®) gel groups compared to gum acacia or PEGMA-alone groups. Furthermore, wounds dressed with PPH or Intrasite(®) gel showed evident collagen deposition, enhanced fibrosis and extensively organized angiogenesis on day 14 compared to the negative control group. While improvement in wound healing of the PH dressed group could be observed, there was no significant difference between the negative control group and the PH dressed group in any of the tests. The findings suggested that topical application of PPH accelerated the rats' wound healing process by improving angiogenesis attributed to the increased microvessel density (MVD) and expressions of VEGF-A in tissue samples. Thus, PPH has been demonstrated to be effective in the treatment of cutaneous wounds in rats, and could be a potential novel agent in the management and acceleration of wound healing in humans and animals.
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Affiliation(s)
- Ahmad Mohammed Gumel
- Institute of Biological Sciences, Faculty of Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Ishii S, Kaneko J, Nagasaki Y. Dual Stimuli-Responsive Redox-Active Injectable Gel by Polyion Complex Based Flower Micelles for Biomedical Applications. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00305] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shiro Ishii
- Department
of Materials Science, Graduate School of Pure and Applied
Sciences, ‡Master’s School of Medical Sciences, Graduate School of Comprehensive
Human Sciences, and §Satellite Laboratory, International Center for Materials Nanoarchitectonics
(WPI-MANA), National Institute for Materials Science (NIMS), University of Tsukuba, Tennoudai 1-1-1, Tsukuba 305-8573, Japan
| | - Junya Kaneko
- Department
of Materials Science, Graduate School of Pure and Applied
Sciences, ‡Master’s School of Medical Sciences, Graduate School of Comprehensive
Human Sciences, and §Satellite Laboratory, International Center for Materials Nanoarchitectonics
(WPI-MANA), National Institute for Materials Science (NIMS), University of Tsukuba, Tennoudai 1-1-1, Tsukuba 305-8573, Japan
| | - Yukio Nagasaki
- Department
of Materials Science, Graduate School of Pure and Applied
Sciences, ‡Master’s School of Medical Sciences, Graduate School of Comprehensive
Human Sciences, and §Satellite Laboratory, International Center for Materials Nanoarchitectonics
(WPI-MANA), National Institute for Materials Science (NIMS), University of Tsukuba, Tennoudai 1-1-1, Tsukuba 305-8573, Japan
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Alexander A, Saraf S, Saraf S. A comparative study of chitosan and poloxamer based thermosensitive hydrogel for the delivery of PEGylated melphalan conjugates. Drug Dev Ind Pharm 2015; 41:1954-61. [DOI: 10.3109/03639045.2015.1011167] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Xu Y, Shen Y, Ouahab A, Li C, Xiong Y, Tu J. Antitumor activity of TNF-α after intratumoral injection using an in situ thermosensitive hydrogel. Drug Dev Ind Pharm 2013; 41:369-74. [PMID: 24274583 DOI: 10.3109/03639045.2013.861480] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Local drug delivery strategies based on nanoparticles, gels, polymeric films, rods and wafers are increasingly used in cancer chemotherapy in order to enhance therapeutic effect and reduce systemic toxicity. Herein, a biodegradable and biocompatible in situ thermosensitive hydrogel was designed and employed to deliver tumor necrosis factor-α (TNF-α) locally by intratumoral injection. The triblock copolymer was synthesized by ring-opening polymerization (ROP) of β-butyrolactone (β-BL) and lactide (LA) in bulk using polyethylene glycol (PEG) as an initiator and Sn(Oct)2 as the catalyst, the polymer was characterized by NMR, gel permeation chromatography and differential scanning calorimetry. Blood and tumor pharmacokinetics and in vivo antitumor activity of TNF-α after intratumoral administration in hydrogel or solution with the same dose were evaluated on S180 tumor-bearing mice. Compared with TNF-α solution, TNF-α hydrogel exhibited a longer T1/2 (4-fold) and higher AUCtumor (19-fold), but Cmax was lower (0.5-fold), which means that the hydrogel formulation improved the efficacy with a lower systhemic exposure than the solution formation. In addition, TNF-α hydrogel improved the antitumor activity and survival due to lower systemic exposure than the solution. These results demonstrate that the in situ thermosensitive hydrogel-based local delivery system by intratumoral injection is well suited for the administration of TNF-α.
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Affiliation(s)
- Yourui Xu
- Department of Pharmaceutics, China Pharmaceutical University , Nanjing , China
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