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Rahmatpour A, Alizadeh AH. Biofilm hydrogel derived from physical crosslinking (self-assembly) of xanthan gum and chitosan for removing Cd 2+, Ni 2+, and Cu 2+ from aqueous solution. Int J Biol Macromol 2024; 266:131394. [PMID: 38582469 DOI: 10.1016/j.ijbiomac.2024.131394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 02/20/2024] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
This study aimed to fabricate a series of biodegradable hydrogel films by gelating/physically crosslinking a blend of xanthan gum (XG) and chitosan (CS) in various combinations using a facile, green, and low cost solution casting technique. The adsorption of Cd2+, Cu2+ and Ni2+ by the XG/CS biofilm in aqueous solution was studied in batch experiments to determine how the pH of the solution, contact time, dosage of adsorbent, initial metal ion concentration and ionic strength affect its adsorption. A highly pH-dependent adsorption process was observed for three metal ions. A maximum amount of Cd2+, Ni2+, and Cu2+ ions was adsorbable with 50 mg of the adsorbent at pH 6.0 for an initial metal concentration of 50 mg.L-1. An empirical pseudo-second-order model seems to fit the kinetic experimental data reasonably well. It was found that the Langmuir model correlated better with equilibrium isotherm when compared with the Freundlich model. For Cd2+, Ni2+, and Cu2+ ions at 25 °C, the maximum monolayer adsorption capacity was 152.33, 144.79, and 139.71 mg.g-1, respectively. Furthermore, the biofilm was capable of regenerating, allowing metal ions to adsorb and desorb for five consecutive cycles. Therefore, the developed biodegradable film offers the potential for remediation of specified metal ions.
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Affiliation(s)
- Ali Rahmatpour
- Polymer Chemistry Research Laboratory, Faculty of Chemistry and Petroleum Science, Shahid Beheshti University, P. O. Box 1983969411, Tehran, Iran.
| | - Amir Hossein Alizadeh
- Polymer Chemistry Research Laboratory, Faculty of Chemistry and Petroleum Science, Shahid Beheshti University, P. O. Box 1983969411, Tehran, Iran
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Zhang Z, Cao Q, Xia Y, Cui C, Qi Y, Zhang Q, Wu Y, Liu J, Liu W. Combination of biodegradable hydrogel and antioxidant bioadhesive for treatment of breast cancer recurrence and radiation skin injury. Bioact Mater 2024; 31:408-421. [PMID: 37692912 PMCID: PMC10482898 DOI: 10.1016/j.bioactmat.2023.08.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/08/2023] [Accepted: 08/28/2023] [Indexed: 09/12/2023] Open
Abstract
Postoperative radiotherapy is the standard method for inhibition of breast cancer recurrence and metastasis, whereas radiation resistant and ineluctable skin radiation injury are still key problems encountered in the prognosis of breast cancer. Herein, we design an internally implantable biodegradable hydrogel and extracutaneously applicable antioxidant bioadhesive to concurrently prevent postoperative tumor recurrence and radioactive skin injury after adjuvant radiotherapy. The biodegradable silk fibroin/perfluorocarbon hydrogel loading doxorubicin (DOX) formed by consecutive ultrasonication-induced β-sheets-crosslinked amphiphilic silk fibroin/perfluorocarbon/DOX nanoemulsion, exhibits continuous release of oxygen in physiological environment to improve hypoxia and sensitivity of radiotherapy, as well as simultaneous release of DOX to finally achieve effective anti-cancer effect. A stretchable bioadhesive is fabricated by copolymerization of α-thioctic acid and N, N-diacryloyl-l-lysine, and gold nanorods and gallic acid are loaded into the bioadhesive to afford gentle photothermal therapy and antioxidant functions. The near-infrared light-induced controlled release of gallic acid and mild photothermal therapy can efficiently eliminate excess free radicals generated by radiotherapy and promote radioactive wound healing. Ultimately, in vivo animal studies substantiate the efficacy of our methodology, wherein the post-tumor resection administration of hydrogel and concomitant application of an antioxidant bioadhesive patch effectively inhibit tumor recurrence and attenuate the progression of skin radiation damage.
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Affiliation(s)
- Zhuodan Zhang
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Qiannan Cao
- Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Yi Xia
- Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Chunyan Cui
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Ying Qi
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Qian Zhang
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Yuanhao Wu
- Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Jianfeng Liu
- Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Wenguang Liu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
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Kolya H, Kang CW. Synthesis of starch-based smart hydrogel derived from rice-cooked wastewater for agricultural use. Int J Biol Macromol 2023; 226:1477-1489. [PMID: 36442572 DOI: 10.1016/j.ijbiomac.2022.11.260] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 11/10/2022] [Accepted: 11/24/2022] [Indexed: 11/27/2022]
Abstract
The synthesis of biodegradable hydrogel based on naturally available macromolecules is an important area of research. We synthesized new hydrogel using rice-cooked wastewater (starch), acrylamide, and 2-acrylamido-2-methylpropansulfonic acid in an aqueous medium. The synthesis approach is facile, low-cost, eco-friendly, and novel. The synthesized materials were characterized by scanning electron microscope, X-ray diffraction, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and Thermogravimetric analysis. The hydrogel exhibited maximum tap water absorbency (158.3 g/g) at pH 7, saline water absorbency (50 g/g), urea solution absorbency (141.2 g/g) at 24 h, and excellent water retention capability (47 wt% at 70 °C, 12 h, and 89 wt% at 30 °C, 24 h). Chili plants, mung beans, and pea seeds germinated and grew well in the hydrogel and hydrogel-mixed soil, respectively. The biodegradability study shows 34.6 % at 120 days in soil and 6.5 % at 30 days in the open air. These findings could entice agricultural development in dry soil.
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Affiliation(s)
- Haradhan Kolya
- Department of Housing Environmental Design, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea; Research Institute of Human Ecology, College of Human Ecology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
| | - Chun-Won Kang
- Department of Housing Environmental Design, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea; Research Institute of Human Ecology, College of Human Ecology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
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Nakano T, Yamanaka H, Sakamoto M, Aiki Y, Yanase N, Hori R, Katayama Y, Tsuge I, Saito S, Morimoto N. Adjustable biodegradability of low-swelling hydrogels prepared from recombinant peptides based on human collagen type 1. J Biomater Appl 2022; 37:881-890. [PMID: 36007126 DOI: 10.1177/08853282221123452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
An ideal hydrogel for tissue engineering and regenerative therapy is cytocompatible, biocompatible, and has low-swelling characteristics. Recently, a novel low-swelling hydrogel with a homogenous structure was developed by crosslinking a recombinant peptide, modeled on human collagen type 1 (RCPhC1), with a four-arm polyethylene glycol (tetra-PEG). Here, we hypothesized that the biodegradability of the RCPhC1 hydrogel was adjustable by altering its initial polymer concentration. Three types of RCPhC1 hydrogels were prepared using the initial polymer at different concentrations, and their morphology, swelling ratio, collagenase degradability, cytocompatibility, biocompatibility, and biodegradability were compared. The results revealed a low swelling ratio. The higher the concentration of the initial polymer, the longer it took for it to be degraded by collagenase. The average cell viability ratio was over 92% when using the direct contact method, which suggests that the hydrogels have excellent cytocompatibility. No death, tumorigenesis, exposure of the implants, or skin necrosis associated with the subcutaneous implantation of the hydrogels was found in mice in vivo. Moreover, histological evaluation revealed the formation of a thin fibrous capsule, which suggests an acceptable biocompatibility. Furthermore, as hypothesized, it was confirmed that the biodegradability can be adjusted by changing the initial polymer concentration. Collectively, the ability to fine-tune the biodegradability of RCPhC1 hydrogels demonstrates their potential for use in various clinical applications.
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Affiliation(s)
- Takashi Nakano
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, 38049Kyoto University, Kyoto, Japan
| | - Hiroki Yamanaka
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, 38049Kyoto University, Kyoto, Japan
| | - Michiharu Sakamoto
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, 38049Kyoto University, Kyoto, Japan
| | - Yasuhiro Aiki
- Bio Science & Engineering Laboratory, 34778FUJIFILM Corporation, Kanagawa, Japan
| | - Naoto Yanase
- Analysis Technology Center, 612992FUJIFILM Corporation, Kanagawa, Japan
| | - Ritsuko Hori
- Analysis Technology Center, 612992FUJIFILM Corporation, Kanagawa, Japan
| | - Yasuhiro Katayama
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, 38049Kyoto University, Kyoto, Japan
| | - Itaru Tsuge
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, 38049Kyoto University, Kyoto, Japan
| | - Susumu Saito
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, 38049Kyoto University, Kyoto, Japan
| | - Naoki Morimoto
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, 38049Kyoto University, Kyoto, Japan
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Panyakorn T, Makeudom A, Kangvonkit P, Pattamapun K, Wanachantararak P, Charumanee S, Krisanaprakornkit S. Efficacy of double antibiotics in hydroxypropyl methylcellulose for bactericidal activity against Enterococcus faecalis and Streptococcus gordonii in biofilm. Arch Oral Biol 2021; 129:105210. [PMID: 34293645 DOI: 10.1016/j.archoralbio.2021.105210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/09/2021] [Accepted: 07/14/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE This study aimed to investigate the efficacy of double antibiotics, including ciprofloxacin and metronidazole, in a new vehicle, hydroxypropyl methylcellulose (HPMC), against Enterococcus faecalis and Streptococcus gordonii grown in biofilm. DESIGN Human mandibular premolars were prepared and divided into four groups: (i) negative control, (ii) positive control, (iii) infected with E. faecalis and S. gordonii for 21 days and intracanally medicated with double antibiotics in HPMC, and (iv) infected with E. faecalis and S. gordonii for 21 days and intracanally medicated with calcium hydroxide (UltraCal™). The efficacy of medication for 14 or 28 days was determined by bacterial cultures and RT-qPCR for absolute quantities of E. faecalis and S. gordonii cDNA and for relative mRNA expressions of pbp5 and gtfG genes. RESULTS There were significant decreases in the mean colony forming units and mean cDNA amounts of E. faecalis and S. gordonii in group (iii) on days 14 and 28 compared to those in group (ii) (p < 0.01). However, the mean cDNA amounts of E. faecalis and S. gordonii in group (iv) were found to be significantly increased on day 28 (p < 0.05). The mRNA expression of gtfG was significantly decreased in groups (iii) and (iv) on days 14 and 28, whereas that of pbp5 was significantly increased in group (iv) on days 14 and 28 (p < 0.01). CONCLUSION Double antibiotics in HPMC gel showed an in vitro efficacy against E. faecalis and S. gordonii grown in biofilm, suggesting its clinical application as an intracanal medicament for both primary and persistent infections.
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Affiliation(s)
- Theeraphop Panyakorn
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Anupong Makeudom
- School of Dentistry, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Paisan Kangvonkit
- School of Dentistry, Mae Fah Luang University, Chiang Rai, 57100, Thailand
| | - Kassara Pattamapun
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, 50200, Thailand
| | | | - Suporn Charumanee
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Suttichai Krisanaprakornkit
- Center of Excellence in Oral and Maxillofacial Biology, Department of Oral Biology and Diagnostic Sciences, Faculty of Dentistry, Chiang Mai University, Chiang Mai, 50200, Thailand.
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Shah SA, Sohail M, Khan SA, Kousar M. Improved drug delivery and accelerated diabetic wound healing by chondroitin sulfate grafted alginate-based thermoreversible hydrogels. Mater Sci Eng C Mater Biol Appl 2021; 126:112169. [PMID: 34082970 DOI: 10.1016/j.msec.2021.112169] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/20/2021] [Accepted: 05/03/2021] [Indexed: 12/16/2022]
Abstract
Injectable hydrogels with multifunctional tunable properties comprising biocompatibility, anti-oxidative, anti-bacterial, and/or anti-infection are highly preferred to efficiently promote diabetic wound repair and its development remains a challenge. In this study, we report chondroitin sulphate (CS) and sodium alginate (SA)-based injectable hydrogel using solvent casting method loaded with curcumin that could potentiate reepithelization, increase angiogenesis, and collagen deposition at wound microenvironment to endorse healing cascade. The physical interaction and self-assembly of chondroitin sulfate grafted alginate (CS-Alg-g-PF127) hydrogel were confirmed using nuclear magnetic resonance (1H NMR) and Fourier transformed infrared spectroscopy (FT-IR), and cytocompatibility was confirmed by fibroblast viability assay. The Masson's trichrome (MT) and hematoxylin and eosin (H&E) results revealed that blank chondroitin sulfate grafted alginate (CS-Alg-g-PF127) and CUR loaded CS-Alg-g-PF127 hydrogel had promising tissue regenerative ability, and showing enhanced wound healing compared to other treatment groups. The controlled release of CUR from injectable hydrogel was evaluated by drug release studies and pharmacokinetic profile (PK) using high-performance liquid chromatography (HPLC) that exhibited the mean residence time (MRT) and area under the curve (AUC) was increased up to 16.18 h and 203.64 ± 30.1 μg/mL*h, respectively. Cytotoxicity analysis of the injectable hydrogels using 3 T3-L1 fibroblasts cells and in vivo toxicity evaluated by subcutaneous injection for 24 h followed by histological examination, confirmed good biocompatibility of CUR loaded CS-Alg-g-PF127 hydrogel. Interestingly, the results of in vivo wound healing by injectable hydrogel showed the upregulation of fibroblasts-like cells, collagen deposition, and differentiated keratinocytes stimulating dermo-epidermal junction, which might endorse that they are potential candidates for excisional wound healing models.
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Affiliation(s)
- Syed Ahmed Shah
- Department of Pharmacy, COMSATS University, Islamabad, Abbottabad Campus, 22010, Pakistan
| | - Muhammad Sohail
- Department of Pharmacy, COMSATS University, Islamabad, Abbottabad Campus, 22010, Pakistan.
| | - Shujaat Ali Khan
- Department of Pharmacy, COMSATS University, Islamabad, Abbottabad Campus, 22010, Pakistan
| | - Mubeen Kousar
- Department of Pharmacy, COMSATS University, Islamabad, Abbottabad Campus, 22010, Pakistan
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Wen Y, Li XY, Li ZY, Wang ML, Chen PP, Liu Y, Zhang XZ, Jiang XJ. Intra-myocardial Delivery of a Novel Thermosensitive Hydrogel Inhibits Post-infarct Heart Failure After Degradation in Rat. J Cardiovasc Transl Res 2020; 13:677-685. [PMID: 32020504 DOI: 10.1007/s12265-019-09941-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 11/25/2019] [Indexed: 12/21/2022]
Abstract
Whether intra-myocardial delivery of hydrogel can prevent post-infarct heart failure (HF) in a long follow-up period, especially after it is degraded, remains unclear. In this study, Dex-PCL-HEMA/PNIPAAm (DPHP) hydrogel was delivered into peri-infarct myocardium of rat when coronary artery was ligated, while PBS was employed as control. Twelve weeks later, compared with control, left ventricle remodeling was attenuated and cardiac function was preserved; serum brain natriuretic peptide, cardiac aldosterone, and pulmonary congestion were suppressed in hydrogel group. Pro-fibrogenic mRNA increased in infarct area while decreased in remote zone, as well as hypertrophic mRNA. These data proves DPHP hydrogel suppresses ventricular remodeling and HF by promoting fibrotic healing in infarct area and inhibiting reactive fibrosis and hypertrophy in remote zone. Timely intra-myocardial hydrogel implantation is an effective strategy to inhibit post-infarct cardiac remodeling and have a long-term beneficial effect even after it has been biodegraded.
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Affiliation(s)
- Ying Wen
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, People's Republic of China.,Cardiovascular Research Institute, Wuhan University, Wuhan, People's Republic of China.,Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, People's Republic of China
| | - Xiao-Yan Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, People's Republic of China.,Cardiovascular Research Institute, Wuhan University, Wuhan, People's Republic of China
| | - Ze-Yong Li
- Key Laboratory of Biomedical Polymers of Ministry of Education, Department of Chemistry, Wuhan University, Wuhan, Hubei, People's Republic of China
| | - Meng-Long Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, People's Republic of China.,Cardiovascular Research Institute, Wuhan University, Wuhan, People's Republic of China
| | - Pan-Pan Chen
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, People's Republic of China.,Cardiovascular Research Institute, Wuhan University, Wuhan, People's Republic of China.,People's Hospital of Fangcheng County, Nanyang, Henan, China
| | - Yang Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, People's Republic of China.,Cardiovascular Research Institute, Wuhan University, Wuhan, People's Republic of China
| | - Xian-Zheng Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education, Department of Chemistry, Wuhan University, Wuhan, Hubei, People's Republic of China
| | - Xue-Jun Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei, People's Republic of China. .,Cardiovascular Research Institute, Wuhan University, Wuhan, People's Republic of China.
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Wooster TJ, Acquistapace S, Mettraux C, Donato L, Dekkers BL. Hierarchically structured phase separated biopolymer hydrogels create tailorable delayed burst release during gastrointestinal digestion. J Colloid Interface Sci 2019; 553:308-319. [PMID: 31212230 DOI: 10.1016/j.jcis.2019.06.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 06/09/2019] [Accepted: 06/11/2019] [Indexed: 12/14/2022]
Abstract
The on demand delivery of novel peptide actives, traditional pharmaceuticals, nutrients and/or vitamins is a ever present challenge due to the digestive and metabolic degradation of the active and the delivery vehicle. Biodegradable biopolymer hydrogels have long held promise as candidates for creating tailored release profiles due to the ability to control gel porosity. The present study describes the creation of novel hierarchical biopolymer hydrogels for the controlled release of lipids/lipophilic actives pharmaceutical ingredients (APIs), and mathematically describes the mechanisms that affect the timing of release. The creation of phase separated protein/polysaccharide core (6.6 wt% gelatin, 40 wt% Oil in water emulsion) shell structures (7 g/L xanthan with 70-140 g/L β-lactoglobulin) altered enzyme mass transport processes. This core shell structure enabled the creation of a tailorable burst release of API during gastrointestinal digestion where there is a delay in the onset of release, without affecting the kinetics of release. The timing of the delay could be readily programmed (with release of between 60 and 240 min) by controlling either the thickness or protein concentration (between 70 g/L and 140 g/L β-lactoglobulin) of the outer mixed biopolymer hydrogel shell (7 g/L xanthan with 70-140 g/L β-lactoglobulin). Enzyme diffusion measurements demonstrated that surface erosion was the main degradation mechanism. A kinetic model was created to describe the delayed burst release behaviour of APIs encapsulated within the core, and successfully predicted the influence of shell thickness and shell protein density on the timing of gastro-intestinal release (in vitro). Our work highlights the creation of a novel family of core-shell hydrogel oral dosage forms capable of programmable delivery of lipids/lipophilic APIs. These findings could have considerable implications for the delivery of peptides, poorly soluble drugs, or the programmed delivery of lipids within the gastrointestinal tract.
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Affiliation(s)
- T J Wooster
- Nestec S.A., Nestlé Research Centre, Vers-chez-les-Blanc, CH 1000, Switzerland.
| | - S Acquistapace
- Nestec S.A., Nestlé Research Centre, Vers-chez-les-Blanc, CH 1000, Switzerland
| | - C Mettraux
- Nestec S.A., Nestlé Research Centre, Vers-chez-les-Blanc, CH 1000, Switzerland
| | - L Donato
- Nestec S.A., Nestlé Research Centre, Vers-chez-les-Blanc, CH 1000, Switzerland
| | - B L Dekkers
- Nestec S.A., Nestlé Research Centre, Vers-chez-les-Blanc, CH 1000, Switzerland
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Esaki S, Katsumi S, Hamajima Y, Nakamura Y, Murakami S. Transplantation of Olfactory Stem Cells with Biodegradable Hydrogel Accelerates Facial Nerve Regeneration After Crush Injury. Stem Cells Transl Med 2018; 8:169-178. [PMID: 30417987 PMCID: PMC6344901 DOI: 10.1002/sctm.15-0399] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 07/21/2018] [Accepted: 08/20/2018] [Indexed: 01/12/2023] Open
Abstract
Olfactory mucosa contains neural stem cells, called olfactory stem cells (OSCs), which produce trophic support required for promoting axonal regeneration after nerve injury. However, the local tissue environment can reduce the viability/function of transplanted cells when placed directly on the injury. Although gelatin hydrogels have been shown to aid cell survival during transplantation, such OSC‐hydrogel combinations have not been extensively tested, particularly during recovery from facial nerve palsy. In this study, OSCs were isolated from the olfactory mucosae of newborn mice and were shown to express neural stem cell markers before differentiation, as well as cell‐type specific markers after differentiation, confirming their multipotency. The OSCs also secrete growth factors and various cytokines that promote nerve regeneration. To test the effects of OSC transplantation in vivo, Medgel, a biodegradable hydrogel sponge, was applied to retain OSCs around the injury site and to lessen the detrimental effects of the local environment in an established facial nerve palsy mouse model. When OSCs were transplanted into the injury site, accelerated recovery was observed for 1 week. When OSCs were transplanted with Medgel, a higher level and duration of accelerated recovery was observed. OSCs in Medgel also increased peripheral nerve function and increased the number of regenerated nerve fibers. These results suggest that OSCs implanted with Medgel accelerate and enhance recovery from facial palsy in mice. Because human OSCs can be easily obtained from olfactory mucosa biopsies with limited risk, this OSC‐Medgel combination is a candidate treatment option for accelerating recovery after facial nerve injury. stem cells translational medicine2019;8:169&10
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Affiliation(s)
- Shinichi Esaki
- Department of Otolaryngology, Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan.,Department of Virology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sachiyo Katsumi
- Department of Otolaryngology, Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan
| | - Yuki Hamajima
- Department of Otolaryngology, Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan
| | - Yoshihisa Nakamura
- Department of Otolaryngology, Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan
| | - Shingo Murakami
- Department of Otolaryngology, Head & Neck Surgery, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan
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Zhang L, Zheng GJ, Guo YT, Zhou L, Du J, He H. Preparation of novel biodegradable pHEMA hydrogel for a tissue engineering scaffold by microwave-assisted polymerization. ASIAN PAC J TROP MED 2014; 7:136-40. [PMID: 24461527 DOI: 10.1016/s1995-7645(14)60009-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 12/15/2013] [Accepted: 01/15/2014] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVE To prepare a novel biodegradable poly(2-hydroxyethylmethacrilate) (pHEMA) hydrogel as tissue engineering scaffold. METHODS The pHEMA hydrogel was synthesized by microwave-assisted polymerization using 2-hydroxyethyl methacrylate (HEMA) as the raw material, potassium persulfate as the initiator, and PCLX as the cross-linking additive. The hydrogels was characterized with FTIR and NMR spectroscopy. The physical and chemical properties of the prepared hydrogel were evaluated, and its degradation performance was tested. The cytotoxicity of the optimum composite hydrogel was measured by an MTT assay to confirm the feasibility of its use in tissue engineering. RESULTS The optimum conditions under which the hydrogel was prepared by microwave-assisted polymerization are as follows: 1.5 g cross-linking additive, 0.3 g initiator, reaction temperature of 80 °C, and microwave power of 800 W. Degradation studies showed good degradation profiles with 75% in 17 days. Additionally, the hydrogels did not elicit any cytotoxic response in in vitro cytotoxic assays. CONCLUSION A biodegradable pHEMA hydrogel was successfully prepared by microwave-assisted polymerization, as confirmed from FTIR and NMR results. The hydrogel shows promising applications in tissue engineering, and its healing ability and biocompatibility will be evaluated in detail in the future.
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Affiliation(s)
- Li Zhang
- Department of Orthodontics, Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Gen-Jian Zheng
- Department of Stomatology, The Affiliated Hospital of Hainan Medical College, Hainan Medical University, Haikou 570102, China.
| | - Ya-Tong Guo
- College of Materials and Chemical Engineering, Hainan University, Haikou 571100, China
| | - Lan Zhou
- Department of Stomatology, The Affiliated Hospital of Hainan Medical College, Hainan Medical University, Haikou 570102, China
| | - Jie Du
- College of Materials and Chemical Engineering, Hainan University, Haikou 571100, China
| | - Hong He
- Department of Orthodontics, Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China.
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Kono H. Characterization and properties of carboxymethyl cellulose hydrogels crosslinked by polyethylene glycol. Carbohydr Polym 2014; 106:84-93. [PMID: 24721054 DOI: 10.1016/j.carbpol.2014.02.020] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 01/31/2014] [Accepted: 02/05/2014] [Indexed: 10/25/2022]
Abstract
Novel hydrogels were prepared from carboxymethyl cellulose (CMC) sodium salt by crosslinking with polyethylene glycol diglycidyl ether (PEGDE). The detailed structures of the hydrogels were determined via FTIR and solid-state NMR spectroscopic analyses. Increasing the feed ratio of PEGDE to CMC in the reaction mixture led to an increase in the crosslinking degree, which enhanced the physical strength of the hydrogels. The hydrogels exhibited enzyme degradability, and after 3 days of incubation with cellulase, 62-28 wt% of the CMC in the hydrogel was degraded under the conditions employed in this study. In addition, the hydrogels exhibited protein adsorption and release abilities, and the amounts of proteins adsorbed on the hydrogels and the release profile of the proteins depended on the protein sizes and crosslinking degree of the hydrogels. These unique properties might enable the use of CMC-based hydrogels as drug delivery system carriers for protein-based drugs if the biological safety of the hydrogel can be verified.
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Affiliation(s)
- Hiroyuki Kono
- Department of Science and Engineering for Materials, Tomakomai National College of Technology, Nishikioka 443, Tomakomai, Hokkaido 059 1275, Japan.
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