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Dang PA, Palomino-Durand C, Elsafi Mabrouk M, Marquaille P, Odier C, Norvez S, Pauthe E, Corté L. Rational formulation design of injectable thermosensitive chitosan-based hydrogels for cell encapsulation and delivery. Carbohydr Polym 2022; 277:118836. [PMID: 34893253 DOI: 10.1016/j.carbpol.2021.118836] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 09/12/2021] [Accepted: 10/27/2021] [Indexed: 11/26/2022]
Abstract
This work reports a rational design of injectable thermosensitive chitosan systems for cell encapsulation and delivery. Using mixtures of two phosphate salts, beta-glycerophosphate and ammonium hydrogen phosphate, we demonstrate that the pH and the osmolarity can be adjusted separately by varying the molar ratios between the salts and the d-glucosamine monomers. We found the existence of a critical temperature above which gelation time decays following a power-law. This gelation kinetics can be finely tuned through the pH and salt-glucosamine ratios. Formulations having physiological pH and osmolarity were produced for chitosan concentrations ranging from 0.4 to 0.9 wt%. They remain liquid for more than 2 h at 20 °C and form a macroporous gel within 2 min at 37 °C. In vitro encapsulation of pre-osteoblastic cells and gingival fibroblasts showed homogeneous cell distribution and good cell viability up to 24 h. Such an approach provides a valuable platform to design thermosensitive cell-laden systems.
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Affiliation(s)
- Phuong Anh Dang
- Molecular, Macromolecular Chemistry and Materials, C3M, ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75005 Paris, France; Équipe de Recherche sur les Relations Matrice Extracellulaire-Cellule, ERRMECe, CY Cergy Paris Université, Maison Internationale de la Recherche, 1 rue Descartes, 95000 Neuville-sur-Oise, France
| | - Carla Palomino-Durand
- Équipe de Recherche sur les Relations Matrice Extracellulaire-Cellule, ERRMECe, CY Cergy Paris Université, Maison Internationale de la Recherche, 1 rue Descartes, 95000 Neuville-sur-Oise, France
| | - Mohamed Elsafi Mabrouk
- Molecular, Macromolecular Chemistry and Materials, C3M, ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75005 Paris, France
| | - Pierre Marquaille
- Molecular, Macromolecular Chemistry and Materials, C3M, ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75005 Paris, France
| | - Clément Odier
- Molecular, Macromolecular Chemistry and Materials, C3M, ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75005 Paris, France
| | - Sophie Norvez
- Molecular, Macromolecular Chemistry and Materials, C3M, ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75005 Paris, France
| | - Emmanuel Pauthe
- Équipe de Recherche sur les Relations Matrice Extracellulaire-Cellule, ERRMECe, CY Cergy Paris Université, Maison Internationale de la Recherche, 1 rue Descartes, 95000 Neuville-sur-Oise, France
| | - Laurent Corté
- Molecular, Macromolecular Chemistry and Materials, C3M, ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75005 Paris, France; Centre des Matériaux, MINES ParisTech, CNRS, PSL University, 63-65 rue Henri-Auguste Desbruères, 91003 Evry, France.
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Abdelrahman TA, Motawea A, El-Dahhan MS, Abdelghani GM. Chitosan-dipotassium orthophosphate lyophilizate: a novel in situ thermogel carrier system of allogeneic platelet lysate growth factors. Drug Deliv 2022; 29:413-426. [PMID: 35098833 PMCID: PMC8812773 DOI: 10.1080/10717544.2022.2030429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The clinical success of platelet-rich plasma (PRP) is constrained by its limited mechanical strength, rapid disintegration by lytic enzymes, and the consequent short-term release of bioactive growth factors (GFs). Recently, attempts to formulate PRP and other hemoderivatives, such as platelet lysate (PL) have been underway. The current study aimed to formulate allogeneic freeze-dried human platelet lysate (HPL) onto lyophilized chitosan - dipotassium hydrogen orthophosphate (CS/DHO) thermo-sensitive scaffolds. A systemic approach was employed to optimize freeze-drying (FD) procedures targeting predefined critical quality attributes (CQAs). Thermal behavior, vibrational spectroscopy, morphological and moisture content analyses were used to detect possible protein destabilization during formulation and suboptimal cake properties. The effect of CS/DHO concentrations on thermo-responsiveness and release kinetics were investigated. Finally, six-months stability and cytotoxicity studies were carried out. An optimized lyophilizate was attainable with residual moisture of less than 5% and thermoresponsive to 33 °C in less than 3 min. HPL proteins were sustainedly released over five days in a pH-sensitive manner. The stability study indicated plausible physical and biochemical stability. Cell viability testing supported the cytocompatibility of the system. Finally, the lyophilizate variant of CS/DHO thermogel overcomes limited storage stability previously posed as a challenge in freshly prepared thermogels. The developed system overcomes the drawbacks of currently used PRP treatment and provides a novel GF-rich scaffold for wound repair.
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Affiliation(s)
- Toaa A Abdelrahman
- Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Amira Motawea
- Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Marwa S El-Dahhan
- Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Galal M Abdelghani
- Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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3
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Insights in the rheological properties of PLGA-PEG-PLGA aqueous dispersions: Structural properties and temperature-dependent behaviour. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Characterization of insect chitosan films from Tenebrio molitor and Brachystola magna and its comparison with commercial chitosan of different molecular weights. Int J Biol Macromol 2020; 160:953-963. [DOI: 10.1016/j.ijbiomac.2020.05.255] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 05/25/2020] [Accepted: 05/28/2020] [Indexed: 12/25/2022]
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Modification of Chitosan for the Generation of Functional Derivatives. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9071321] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Today, chitosan (CS) is probably considered as a biofunctional polysaccharide with the most notable growth and potential for applications in various fields. The progress in chitin chemistry and the need to replace additives and non-natural polymers with functional natural-based polymers have opened many new opportunities for CS and its derivatives. Thanks to the specific reactive groups of CS and easy chemical modifications, a wide range of physico-chemical and biological properties can be obtained from this ubiquitous polysaccharide that is composed of β-(1,4)-2-acetamido-2-deoxy-d-glucose repeating units. This review is presented to share insights into multiple native/modified CSs and chitooligosaccharides (COS) associated with their functional properties. An overview will be given on bioadhesive applications, antimicrobial activities, adsorption, and chelation in the wine industry, as well as developments in medical fields or biodegradability.
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Hejjaji EMA, Smith AM, Morris GA. Evaluation of the mucoadhesive properties of chitosan nanoparticles prepared using different chitosan to tripolyphosphate (CS:TPP) ratios. Int J Biol Macromol 2018; 120:1610-1617. [PMID: 30282010 DOI: 10.1016/j.ijbiomac.2018.09.185] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 09/03/2018] [Accepted: 09/28/2018] [Indexed: 12/17/2022]
Abstract
Mucoadhesive molecules such as chitosan, can allow targeting of a particular tissue to prolong residence time and subsequently improve bioavailability. The purpose of this study was to investigate chitosan-tripolyphosphate (CS:TPP) nanoparticles and to evaluate the interaction between nanoparticles of different CS:TPP ratios with mucin using viscosity, particle size analysis and ζ-potential. For all CS:TPP ratios examined, a minimum value of viscosity was reached for a 3:1 CS:TPP ratio, however chitosan nanoparticles at this ratio were not stable (<+30 mV), whereas a CS:TPP ratio of 4:1 displayed the strongest interaction. This suggests a minimum CS:TPP ratio of 4:1 is required to produce stable nanoparticles able to form strong interactions, which is consistent with a greater mucin binding efficiencies at CS:TPP ratios of 4:1 and higher, which were quantified using a colorimetric assay. Further analysis of similar systems could lead potentially to tuneable chitosan nanoparticles for specific applications.
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Affiliation(s)
- Ezzeddin M A Hejjaji
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK; Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK
| | - Alan M Smith
- Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK
| | - Gordon A Morris
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield HD1 3DH, UK.
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Skwarczynska A, Kaminska M, Owczarz P, Bartoszek N, Walkowiak B, Modrzejewska Z. The structural (FTIR, XRD, and XPS) and biological studies of thermosensitive chitosan chloride gels with β-glycerophosphate disodium. J Appl Polym Sci 2018. [DOI: 10.1002/app.46459] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Agata Skwarczynska
- Department of Civil, Environmental Engineering and Architecture; Rzeszow University of Technology, Powstancow Warszawy 6; Rzeszow 35-959 Poland
| | - Marta Kaminska
- Institute of Materials Science and Engineering, Lodz University of Technology, Stefanowskiego 1/15; Lodz 90-924 Poland
| | - Piotr Owczarz
- Faculty of Process and Environmental Engineering; Lodz University of Technology, Wolczanska 175; Lodz 90-924 Poland
| | - Nina Bartoszek
- BioNanoPark Laboratories of Lodz Regional Park of Science and Technology, Dubois 144; Lodz 93-465 Poland
| | - Bogdan Walkowiak
- Institute of Materials Science and Engineering, Lodz University of Technology, Stefanowskiego 1/15; Lodz 90-924 Poland
- BioNanoPark Laboratories of Lodz Regional Park of Science and Technology, Dubois 144; Lodz 93-465 Poland
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Perinelli DR, Campana R, Skouras A, Bonacucina G, Cespi M, Mastrotto F, Baffone W, Casettari L. Chitosan Loaded into a Hydrogel Delivery System as a Strategy to Treat Vaginal Co-Infection. Pharmaceutics 2018; 10:pharmaceutics10010023. [PMID: 29401648 PMCID: PMC5874836 DOI: 10.3390/pharmaceutics10010023] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 01/27/2018] [Accepted: 02/01/2018] [Indexed: 12/31/2022] Open
Abstract
Polymeric hydrogels are common dosage forms designed for the topical administration of antimicrobial drugs to treat vaginal infections. One of the major advantages of using chitosan in these formulations is related to the intrinsic and broad antimicrobial activity exerted on bacteria and fungi by this natural polymer. Most vaginal yeast infections are caused by the pathogenic fungus Candida albicans. However, despite the anti-Candida activity towards and strains susceptibility to low molecular weight chitosan being documented, no information is available regarding the antimicrobial efficacy of mixed hydrogels in which chitosan is dispersed in a polymeric matrix. Therefore, the aim of the study is to evaluate the anti-Candida activity against eight different albicans and non-albicans strains of a mixed hydroxypropyl methylcellulose (HPMC)/chitosan hydrogel. Importantly, chitosan was dispersed in HPMC matrix either assembled in nanoparticles or in a monomolecular state to eventually correlate any variation in terms of rheological and mucoadhesive properties, as well as anti-Candida activity, with the chitosan form. Hydrogels containing 1% w/w chitosan, either as free polymer chain or assembled in nanoparticles, showed an improved mucoadhesiveness and an anti-Candida effect against all tested albicans and non-albicans strains. Overall, the results demonstrate the feasibility of preparing HPMC/CS mixed hydrogels intended for the prevention and treatment of Candida infections after vaginal administration.
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Affiliation(s)
- Diego R Perinelli
- School of Pharmacy, University of Camerino, Via Gentile III da Varano, 62032 Camerino (MC), Italy.
| | - Raffaella Campana
- Department of Biomolecular Sciences, University of Urbino, Piazza del Rinascimento n° 6, 61029 Urbino (PU), Italy.
| | - Athanasios Skouras
- Department of Biomolecular Sciences, University of Urbino, Piazza del Rinascimento n° 6, 61029 Urbino (PU), Italy.
| | - Giulia Bonacucina
- School of Pharmacy, University of Camerino, Via Gentile III da Varano, 62032 Camerino (MC), Italy.
| | - Marco Cespi
- School of Pharmacy, University of Camerino, Via Gentile III da Varano, 62032 Camerino (MC), Italy.
| | - Francesca Mastrotto
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via F. Marzolo n° 5, 35131 Padova (PD), Italy.
| | - Wally Baffone
- Department of Biomolecular Sciences, University of Urbino, Piazza del Rinascimento n° 6, 61029 Urbino (PU), Italy.
| | - Luca Casettari
- Department of Biomolecular Sciences, University of Urbino, Piazza del Rinascimento n° 6, 61029 Urbino (PU), Italy.
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Abdel-Fattah WI, El Ashry SH, Ali GW, Hamid MAA, El-Din AG, El-Ashry B. Regeneration of periapical lesions post-endodontic treatment and periapical surgeries in experimental animals utilizing thermo-responsive nano-β-tricalcium phosphate/chitosan hydrogel: a proof of concept. Biomed Mater 2017; 12:045007. [PMID: 28677589 DOI: 10.1088/1748-605x/aa6f26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Using phosphate nanoparticles/polymeric hydrogels presents an interesting approach, especially concerning the reduced particle migration and enhanced biocompatibility. The current work aims to achieve a proof of concept for the development of a thermo-sensitive nano β-tricalcium phosphate (β-TCP)/chitosan (Cs)/glycerophosphate (Gl)/glyoxal (Gly) hydrogel to be applied in periapical surgeries post endodontic treatment. Physicochemical characterization using x-ray powder diffraction, Fourier transform infrared, TEM and SEM was performed. Bone formation efficiency of the achieved β-TCP/Cs/Gl/Gly hydrogel was followed. The composite gels were tested in vivo in dogs in comparison with the commercially available and surgically applied Klipdent-PL® up to three months. Radiographic examinations were performed. Histological evaluations were achieved through histomorphological criteria being apical cementum surface, bone tissue resorption, apical PDL thickness, the intensity of inflammatory reaction and osseous repair. The cytotoxicity results proved the safety of the developed hydrogel. The thermo-sensitive hydrogel possessed comparable enhanced biocompatibility with anti-inflammatory activity. New bone formation was clearly enhanced in the infected teeth. Therefore, it can be directly applied in specific non-invasive dental surgeries.
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Affiliation(s)
- Wafa I Abdel-Fattah
- Emeritus, Refractories, Ceramics, Building Materials Dept.: Biomaterials Group, National Research Centre, Egypt
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Kiilll CP, Barud HDS, Santagneli SH, Ribeiro SJL, Silva AM, Tercjak A, Gutierrez J, Pironi AM, Gremião MPD. Synthesis and factorial design applied to a novel chitosan/sodium polyphosphate nanoparticles via ionotropic gelation as an RGD delivery system. Carbohydr Polym 2017; 157:1695-1702. [DOI: 10.1016/j.carbpol.2016.11.053] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 11/18/2016] [Accepted: 11/18/2016] [Indexed: 02/07/2023]
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12
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Rheological properties of gallic acid-grafted-chitosans with different substitution degrees. Lebensm Wiss Technol 2016. [DOI: 10.1016/j.lwt.2016.08.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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13
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Composite chitosan-transfersomal vesicles for improved transnasal permeation and bioavailability of verapamil. Int J Biol Macromol 2016; 93:591-599. [PMID: 27620464 DOI: 10.1016/j.ijbiomac.2016.09.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 09/05/2016] [Accepted: 09/07/2016] [Indexed: 11/20/2022]
Abstract
The creation of composite systems has become an emerging field in drug delivery. Chitosan has demonstrated several pharmaceutical advantages, especially in intranasal delivery. In this manuscript, a comparative study was conducted between regular vesicles (transfersomes and penetration enhancer vesicles) and composite vesicles (chitosan containing transfersomes and penetration enhancer vesicles) loaded with a model antihypertensive drug; verapamil hydrochloride VRP. Composite vesicles displayed larger particle size than regular vesicles owing to the coating potential of chitosan on the vesicular bilayer as displayed by transmission electron microscopy, with an increased viscosity of composite vesicles and a shift in the zeta potential values from negative to positive. The entrapment efficiency of VRP in the vesicles ranged from 24 to 64%, with best physical stability displayed with transfersomal vesicles prepared using sodium deoxycholate. Chitosan slowed the in vitro release of VRP from the selected formulation but managed to achieve high penetrability across sheep nasal mucosa as displayed by confocal laser microscopy. The chitosan composite transfersomal formulation exhibited absolute bioavailability of 81.83% compared to the oral solution which displayed only 13.04%. Findings of this manuscript highly recommend chitosan as a promising functional additive in vesicular formulations to improve the intranasal delivery of drugs with low oral bioavailability.
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Hirun N, Tantishaiyakul V, Sangfai T, Rugmai S, Soontaranon S. Nano-structure, phase transition and morphology of gallic acid and xyloglucan hydrogel. Polym Bull (Berl) 2016. [DOI: 10.1007/s00289-016-1604-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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15
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Arunkumar P, Indulekha S, Vijayalakshmi S, Srivastava R. Poly (caprolactone) microparticles and chitosan thermogels based injectable formulation of etoricoxib for the potential treatment of osteoarthritis. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 61:534-44. [PMID: 26838881 DOI: 10.1016/j.msec.2015.12.039] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/19/2015] [Accepted: 12/16/2015] [Indexed: 01/29/2023]
Abstract
This study aimed to evaluate Poly (caprolactone) microparticles (MPs) loaded composite injectable Chitosan gel (CICGs) as a dual purpose (visco-supplement and intra articular drug delivery depot) therapeutic agent for the treatment of Osteoarthritis. Etoricoxib (COX-2 inhibitor), a highly hydrophobic drug was chosen as a model drug for the study. When administered orally, Etoricoxib poses severe cardiovascular toxicity issues. So, we have attempted to deliver this drug intra-articularly, which could retain the drug longer in the joint region and thus could ameliorate these toxicity issues. CICGs were prepared by dispersing MPs in the chitosan-Ammonium hydrogen phosphate solution and incubated at 37 °C. Rheology studies proved that gels were stable and had visco-elastic properties comparable to that of existing visco-supplements. The in vitro drug release profiles of CICGs were found to be more controlled when compared to MPs and bare chitosan gel (BCGs). In vitro and in vivo biocompatibility studies proved that the gels were biocompatible. In vivo synovial drug clearance studies proved that CICGs had a better drug retention capacity than BCGs and MPs. In vivo fluorescence imaging results confirmed that CICGs could stay longer in the joint region when compared to BCGs and MPs. Thus this novel CICGs could be a potential dual purpose gel for the treatment of diseased joint regions especially for Osteoarthritis.
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Affiliation(s)
- P Arunkumar
- Centre for Research in Nanotechnology and Science (CRNTS), Indian Institute of Technology, Bombay, India
| | - S Indulekha
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, India
| | - S Vijayalakshmi
- Centre for Research in Nanotechnology and Science (CRNTS), Indian Institute of Technology, Bombay, India
| | - R Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, India.
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Ning X, Zhao C, Pang J, Ding Z, Wang Y, Xu K, Chen H, Li B, Luo QI. Experimental study of temperature-sensitive chitosan/β-glycerophosphate embolic material in embolizing the basicranial rete mirabile in swines. Exp Ther Med 2015; 10:316-322. [PMID: 26170955 DOI: 10.3892/etm.2015.2479] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 02/19/2015] [Indexed: 12/20/2022] Open
Abstract
The aim of the present study was to evaluate the feasibility of the non-adhesive temperature-sensitive liquid embolic material, chitosan/β-glycerophosphate (C/GP), in embolizing the basicranial rete mirabile (REM) in a swine model of cerebral arteriovenous malformation (cAVM). A total of 24 domestic swines were used as the experimental animals, among which 12 pigs underwent direct embolization of one side of the REM, while the other 12 pigs underwent embolization of the bilateral REM following anastomosis of the carotid artery and jugular vein. A super-selective microcatheter was introduced into the REM during the embolization procedure, and the C/GP hydrogel was injected until an image of the REM disappeared in the angiography examination. Further angiography examinations were performed after 2 and 6 weeks, and histological examination of the REM was performed after 6 weeks. Of the 24 domestic swines, 23 cases underwent successful thrombosis. Convulsions occurred in one case and that pig died during the embolization procedure. Following embolization, the angiography observations revealed that the embolized REM was no longer able to be developed, and adhesion of the microcatheter tip with the embolic agent did not occur. In addition, no apparent revascularization was observed in the angiography examinations performed at weeks 2 and 6. Therefore, the current preliminary study indicated that use of the non-adhesive temperature-sensitive embolic material was feasible for the embolization of cAVM; thus, C/GP may be used as an ideal embolic material for the treatment of cAVM.
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Affiliation(s)
- Xianbin Ning
- Department of Neurosurgery, The Affiliated Hospital of Beihua University, Jilin City, Jilin 132011, P.R. China
| | - Changfu Zhao
- Department of Neurosurgery, The Affiliated Hospital of Beihua University, Jilin City, Jilin 132011, P.R. China
| | - Jinfeng Pang
- Department of Neurosurgery, The Affiliated Hospital of Beihua University, Jilin City, Jilin 132011, P.R. China
| | - Zhaoyi Ding
- Department of Neurosurgery, The Affiliated Hospital of Beihua University, Jilin City, Jilin 132011, P.R. China
| | - Yubo Wang
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Kan Xu
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Hao Chen
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Bingwei Li
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Q I Luo
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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Dang QF, Yan JQ, Lin H, Liu CS, Chen XG, Ji QX, Li J, Liu Y. Biological evaluation of chitosan-basedin situ-forming hydrogel with low phase transition temperature. J Appl Polym Sci 2014. [DOI: 10.1002/app.41594] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qi Feng Dang
- Ocean University of China; Qingdao 266003 People's Republic of China
| | - Jing Quan Yan
- Ocean University of China; Qingdao 266003 People's Republic of China
| | - Hong Lin
- Ocean University of China; Qingdao 266003 People's Republic of China
| | - Cheng Sheng Liu
- Ocean University of China; Qingdao 266003 People's Republic of China
| | - Xi Guang Chen
- Ocean University of China; Qingdao 266003 People's Republic of China
| | - Qiu Xia Ji
- The Affiliated Hospital of Medical College, Qingdao University; Qingdao 266001 People's Republic of China
| | - Jing Li
- Ocean University of China; Qingdao 266003 People's Republic of China
| | - Ya Liu
- Ocean University of China; Qingdao 266003 People's Republic of China
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Influence of unmodified and β-glycerophosphate cross-linked chitosan on anti-Candida activity of clotrimazole in semi-solid delivery systems. Int J Mol Sci 2014; 15:17765-77. [PMID: 25272230 PMCID: PMC4227188 DOI: 10.3390/ijms151017765] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/01/2014] [Accepted: 09/15/2014] [Indexed: 12/03/2022] Open
Abstract
The combination of an antifungal agent and drug carrier with adjunctive antimicrobial properties represents novel strategy of complex therapy in pharmaceutical technology. The goal of this study was to investigate the unmodified and ion cross-linked chitosan’s influence on anti-Candida activity of clotrimazole used as a model drug in hydrogels. It was particularly crucial to explore whether the chitosans’ structure modification by β-glycerophosphate altered its antifungal properties. Antifungal studies (performed by plate diffusion method according to CLSI reference protocol) revealed that hydrogels obtained with chitosan/β-glycerophosphate displayed lower anti-Candida effect, probably as a result of weakened polycationic properties of chitosan in the presence of ion cross-linker. Designed chitosan hydrogels with clotrimazole were found to be more efficient against tested Candida strains and showed more favorable drug release profile compared to commercially available product. These observations indicate that novel chitosan formulations may be considered as promising semi-solid delivery system of clotrimazole.
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Supper S, Anton N, Boisclair J, Seidel N, Riemenschnitter M, Curdy C, Vandamme T. Chitosan/glucose 1-phosphate as new stable in situ forming depot system for controlled drug delivery. Eur J Pharm Biopharm 2014; 88:361-73. [PMID: 24859306 DOI: 10.1016/j.ejpb.2014.05.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 05/10/2014] [Accepted: 05/14/2014] [Indexed: 10/25/2022]
Abstract
Chitosan (CS)-based thermosensitive solutions that turn into semi-solid hydrogels upon injection at body temperature have increasingly drawn attention over the last decades as an attractive new type of in situ forming depot (ISFD) drug delivery system. Despite the great potential of the standard CS/β-glycerophosphate (β-GP) thermogelling solutions, their lack of stability over time at room temperature as well as at refrigerated conditions renders them unsuitable as ready-to-use drug product. In the present study, we investigated Glucose-1-Phosphate (G1-P) as an alternative gelling agent for improving the stability of CS-based ISFD solutions. The in vitro release performance of CS/G1-P formulations was assessed using several model compounds. Furthermore, the local tolerance of subcutaneously implanted CS/G1-P hydrogels was investigated by histological examination over three weeks. The thermogelling potential of CS/G1-P solutions, determined by rheology, is dependent on the polymer molecular weight (Mw) and concentration as well as on the G1-P concentration. Differential scanning calorimetry (DSC) measurements confirmed that sol/gel transition takes place at around body temperature and is not fully thermo-reversible. The long term storage stability was evaluated through the appearance, pH, viscosity and gelation time at 37°C of the solution. The results emphasized an enhanced stability of the CS/G1-P system compared to the standard CS/β-GP. CS solution with 0.40 mmol/g G1-P is stable for at least 9 months at 2-8°C, versus less than 1 month when using β-GP as gelling agent. Furthermore, the solution is easy to inject, as evidenced from injectability evaluation using 23-30 G needles. In vitro release experiments showed a sustained release over days to weeks for hydrophilic model compounds, demonstrating thereby that CS/G1-P may be suitable for the prolonged delivery of drugs. The inflammatory reaction observed in the tissue surrounding the hydrogel in rats was a typical foreign body reaction, similar to the one observed for CS/β-GP hydrogels. These features confirm the potential of CS/G1-P solutions as an injectable ready-to-use in situ forming hydrogel.
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Affiliation(s)
- Stephanie Supper
- Novartis Pharma AG, Basel, Switzerland; University of Strasbourg, Faculty of Pharmacy, Illkirch Cedex, France; CNRS UMR 7199, Laboratoire de Conception et Application de Molécules Bioactives, équipe de Pharmacie Biogalénique, Illkirch Cedex, France
| | - Nicolas Anton
- University of Strasbourg, Faculty of Pharmacy, Illkirch Cedex, France; CNRS UMR 7199, Laboratoire de Conception et Application de Molécules Bioactives, équipe de Pharmacie Biogalénique, Illkirch Cedex, France.
| | | | | | | | | | - Thierry Vandamme
- University of Strasbourg, Faculty of Pharmacy, Illkirch Cedex, France; CNRS UMR 7199, Laboratoire de Conception et Application de Molécules Bioactives, équipe de Pharmacie Biogalénique, Illkirch Cedex, France
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Supper S, Anton N, Seidel N, Riemenschnitter M, Curdy C, Vandamme T. Thermosensitive chitosan/glycerophosphate-based hydrogel and its derivatives in pharmaceutical and biomedical applications. Expert Opin Drug Deliv 2013; 11:249-67. [PMID: 24304097 DOI: 10.1517/17425247.2014.867326] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
INTRODUCTION Thermogelling chitosan (CS)/glycerophosphate (GP) solutions have been reported as a new type of parenteral in situ forming depot system. These free-flowing solutions at ambient temperature turn into semi-solid hydrogels after parenteral administration. AREAS COVERED Formulation parameters such as CS physico-chemical characteristics, CS/gelling agent ratio or pH of the system, were acknowledged as key parameters affecting the solution stability, the sol/gel transition behavior and/or the final hydrogel structure. We discuss also the use of the standard CS/GP thermogels for various biomedical applications, including drug delivery and tissue engineering. Furthermore, this manuscript reviews the different strategies implemented to improve the hydrogel characteristics such as combination with carrier particles, replacement of GP, addition of a second polymer and chemical modification of CS. EXPERT OPINION The recent advances in the formulation of CS-based thermogelling systems already overcame several challenges faced by the standard CS/GP system. Dispersion of drug-loaded carrier particles into the thermogels allowed achieving prolonged release profiles for low molecular weight drugs; incorporation of an additional polymer enabled to strengthen the network, while the use of chemically modified CS led to enhanced pH sensitivity or biodegradability of the matrix.
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Affiliation(s)
- Stephanie Supper
- Novartis Pharma AG, Technical Research & Development (TRD) , Basel, 4002 , Switzerland
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Supper S, Anton N, Seidel N, Riemenschnitter M, Schoch C, Vandamme T. Rheological study of chitosan/polyol-phosphate systems: influence of the polyol part on the thermo-induced gelation mechanism. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:10229-10237. [PMID: 23865795 DOI: 10.1021/la401993q] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Thermo-sensitive gelling systems, like chitosan/polyol-phosphate, are candidates with a high potential for the design of biodegradable drug delivery systems, notably for in situ forming depots. They consist of stable and low viscosity aqueous solutions, liquid at room temperature, which turn into a gel state upon an increase of temperature (e.g., after subcutaneous administration). This technology enables a sustained release of potentially encapsulated active substances. Despite these thermo-gelling solutions being widely studied for the development of parenteral drug delivery systems, most commonly using β-glycerophosphate (β-GP) as gelling agent, the mechanism inducing the gelation and the role of the polyol part in this mechanism has not been clearly elucidated. To investigate the mechanism of the gelation process, comprehensive rheological studies were performed, comparing different chitosan/polyol-phosphate systems varying in the chemical structure of the polyol parts of the gelling agents. As reference, β-GP was compared to glucose-1-phosphate (G1-P) and glucose-6-phosphate (G6-P) and to a polyol-free phosphate salt, Na2HPO4, as well. Frequency sweep experiments at different temperatures or different gelling agent concentrations, temperature, and time sweep tests were performed as complementary experimental approaches. The results disclosed significant trends with widespread implications, establishing a relationship between the chemical structure of the polyol part and the macroscopic gelling behavior of the solutions, that is, transition temperature, gelation time, and gel strength. The new results presented in this study show that increasing the size of the polyol part prevents the interactions between the chitosan chains, strongly influencing the gelling process.
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Affiliation(s)
- Stephanie Supper
- Novartis Pharma AG, Technical Research & Development (TRD), CH-4002 Basel, Switzerland
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