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Marianecci C, Petralito S, Rinaldi F, Hanieh PN, Carafa M. Some recent advances on liposomal and niosomal vesicular carriers. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2015.10.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Topical curcumin-loaded hydrogels obtained using galactomannan from Schizolobium parahybae and xanthan. Carbohydr Polym 2015; 116:229-36. [DOI: 10.1016/j.carbpol.2014.07.043] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 07/16/2014] [Accepted: 07/19/2014] [Indexed: 12/12/2022]
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Coviello T, Trotta AM, Marianecci C, Carafa M, Di Marzio L, Rinaldi F, Di Meo C, Alhaique F, Matricardi P. Gel-embedded niosomes: preparation, characterization and release studies of a new system for topical drug delivery. Colloids Surf B Biointerfaces 2014; 125:291-9. [PMID: 25524220 DOI: 10.1016/j.colsurfb.2014.10.060] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 08/10/2014] [Accepted: 10/19/2014] [Indexed: 10/24/2022]
Abstract
In the present paper physical gels, prepared with two polysaccharides, Xanthan and Locust Bean Gum, and loaded with non-ionic surfactant vesicles, are described. The vesicles, composed by Tween20 and cholesterol or by Tween85 and Span20, were loaded with Monoammonium glycyrrhizinate for release experiments. Size and zeta (ζ)-potential of the vesicles were evaluated and the new systems were characterized by rheological and dynamo-mechanical measurements. For an appropriate comparison, a Carbopol gel and a commercial gel for topical applications were also tested. The new formulations showed mechanical properties comparable with those of the commercial product indicating their suitability for topical applications. In vitro release experiments showed that the polysaccharide network protects the integrity of the vesicles and leads to their slow release without disruption of the aggregated structures. Furthermore, being the vesicles composed of molecules possessing enhancing properties, the permeation of the loaded drugs topically delivered can be improved. Thus, the new systems combine the advantages of matrices for a modified release (polymeric component) and those of an easier permeability across the skin (vesicle components). Finally, shelf live experiments indicated that the tested gel/vesicle formulations were stable over 1 year with no need of preservatives.
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Affiliation(s)
- T Coviello
- Department of Drug Chemistry and Technologies, "Sapienza", University of Rome, Rome, Italy
| | - A M Trotta
- Department of Drug Chemistry and Technologies, "Sapienza", University of Rome, Rome, Italy
| | - C Marianecci
- Department of Drug Chemistry and Technologies, "Sapienza", University of Rome, Rome, Italy
| | - M Carafa
- Department of Drug Chemistry and Technologies, "Sapienza", University of Rome, Rome, Italy.
| | - L Di Marzio
- Department of Pharmacy, University of Chieti "G. D'Annunzio", Chieti, Italy
| | - F Rinaldi
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00185 Rome, Italy
| | - C Di Meo
- Department of Drug Chemistry and Technologies, "Sapienza", University of Rome, Rome, Italy
| | - F Alhaique
- Department of Drug Chemistry and Technologies, "Sapienza", University of Rome, Rome, Italy
| | - P Matricardi
- Department of Drug Chemistry and Technologies, "Sapienza", University of Rome, Rome, Italy
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Effect of xanthan structure on its interaction with locust bean gum: Toward prediction of rheological properties. Food Hydrocoll 2013. [DOI: 10.1016/j.foodhyd.2013.01.012] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Koop HS, Da-lozzo EJ, de Freitas RA, Franco CR, Mitchell DA, Silveira JL. Rheological Characterization of a Xanthan–Galactomannan Hydrogel Loaded with Lipophilic Substances. J Pharm Sci 2012; 101:2457-67. [DOI: 10.1002/jps.23178] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 04/02/2012] [Accepted: 04/13/2012] [Indexed: 11/11/2022]
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Sandolo C, Bulone D, Mangione MR, Margheritelli S, Di Meo C, Alhaique F, Matricardi P, Coviello T. Synergistic interaction of Locust Bean Gum and Xanthan investigated by rheology and light scattering. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.05.044] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Advancements in non-starch polysaccharides research for frozen foods and microencapsulation of probiotics. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s11705-009-0254-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Brand T, Nolis P, Richter S, Berger S. NMR study of the gelation of a designed gelator. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2008; 46:545-549. [PMID: 18324740 DOI: 10.1002/mrc.2211] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The gelation of a designed gelator was investigated by different NMR methods, which showed a clear thermal hysteresis. Two very simple approaches for the NMR determination of the gelation point are suggested. One involves the observation of the NMR integral, and the other records the ratio of the diffusion coefficients between the gelator and the solvent. Differential behavior of the gelator protons are interpreted as a hint that a part of the gelator molecule might still be flexible as in the dissolved state.
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Affiliation(s)
- Torsten Brand
- Institute of Analytical Chemistry, University of Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
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Functional biopolymers produced by biochemical technology considering applications in food engineering. KOREAN J CHEM ENG 2007. [DOI: 10.1007/s11814-007-0047-1] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sandolo C, Coviello T, Matricardi P, Alhaique F. Characterization of polysaccharide hydrogels for modified drug delivery. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2007; 36:693-700. [PMID: 17429620 DOI: 10.1007/s00249-007-0158-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2006] [Revised: 03/06/2007] [Accepted: 03/15/2007] [Indexed: 11/29/2022]
Abstract
Hydrogels are hydrophilic macromolecular networks that are capable of retaining a large amount of water. A precise description of these systems is actually quite complex and the practical use of hydrogels for drug delivery and biomedical applications is often not supported by a well-defined knowledge of the overall structure of the polymeric network. In this paper, we report the characterization of two different systems: a chemical network based on Guar Gum (GG) and a physical gel prepared with Xanthan (Xanth) and Locust Bean Gum (LBG). The dynamo-mechanical properties of the gels were analysed: the cohesiveness and the adhesion of the networks were strongly dependent on time, temperature, and composition. The kinetics of the chemical crosslinking was followed by means of rheological measurements, i.e. recording the mechanical spectra of the gelling system, and the power law exponent at the gel point was evaluated. Furthermore, the networks, loaded with model drugs with different steric hindrance, were used as matrices for tablets and the rate of release of such model drugs was studied. The diffusion of the guest molecules was deeply dependent on their dimensions; in the case of Xanth-LBG tablets the release profiles were almost independent from the different cohesion properties of the starting hydrogel composition.
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Affiliation(s)
- C Sandolo
- Faculty of Pharmacy, University of Rome La Sapienza, Piazzale A. Moro 5, Rome, Italy
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Liu R, Gao X, Oppermann W. Dynamic light scattering studies on random cross-linking of polystyrene in semi-dilute solution. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.10.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Brand T, Richter S, Berger S. Diffusion NMR as a New Method for the Determination of the Gel Point of Gelatin. J Phys Chem B 2006; 110:15853-7. [PMID: 16898736 DOI: 10.1021/jp062960z] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The gelation of gelatin has been investigated using pulsed field gradient (PFG) NMR. For the first time, diffusion results have been used to determine the gelation point, which is indicated by a minimum in the self-diffusion coefficient of the free polymer fraction vs temperature. Biexponential analysis of the diffusion decay data allowing the diffusion of free and network-bound gelatin to be determined separately has been applied to provide an extended insight into the gelation process. Low-amplitude oscillatory shear rheology and time-resolved dynamic light scattering (DLS) as classical polymer characterization methods were applied as control experiments. All three methods yielded a gelation temperature of 24-25 degrees C for the cooling regime. Hysteresis effects could also be observed.
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Affiliation(s)
- Torsten Brand
- Institute of Analytical Chemistry, University of Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
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