Dynamic rheological measurements and drug release kinetics in swollen scleroglucan matrices

The structure of scleroglucan gel matrices was characterized by dynamic rheological studies. The results were compared with the release kinetics of theophylline in analogous samples using a Franz diffusion cell, fitting the drug release data with a semi-empirical power law. Dynamic rheology gave inf...

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Autor principal: François, Nora Judith
Otros Autores: Rojas, A.M, Daraio, Marta Edit, Bernik, D.L
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Elsevier 2003
Acceso en línea:Registro en Scopus
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024 7 |2 scopus  |a 2-s2.0-0038783259 
024 7 |2 cas  |a scleroglucan, 39464-87-4; theophylline, 58-55-9, 5967-84-0, 8055-07-0, 8061-56-1, 99007-19-9 
030 |a JCREE 
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100 1 |a François, Nora Judith 
245 1 0 |a Dynamic rheological measurements and drug release kinetics in swollen scleroglucan matrices 
260 |b Elsevier  |c 2003 
270 1 0 |m Bernik, D.L.; Inst. Quim. Fis. Mat., Ambiente y E., INQUIMAE, Universidad de Buenos Aires, 3er Piso, C1428EHA Buenos Aires, Argentina; email: dbernik@qi.fcen.uba.ar 
504 |a De Nooy, E.J., Rori, V., Masci, G., Dentini, M., Crescenzi, V., Synthesis and preliminary characterization of charged derivatives and hydrogels from scleroglucan (2000) Carbohydrate Res., 324, pp. 116-126. , and Refs. therein 
504 |a Norisuye, T., Yanaki, T., Fujita, H., Dynamics during thermoreversible gelation of the polysaccharide Schizophyllan (1980) J. Polym. Sci. Polym. Phys. Ed., 18, pp. 547-558 
504 |a Daraio, M.E., François, N.J., Bernik, D.L., Correlation between gel structural properties and drug release pattern in scleroglucan matrices (2003) Drug Delivery, 10 (2), pp. 79-85 
504 |a Ridell, A., Evertsson, H., Nilsson, S., Sundelöf, L.O., Amphiphilic association of ibuprofen and two nonionic cellulose derivatives in aqueous solution (1999) J. Pharm. Sci., 88, pp. 1175-1181 
504 |a Paulson, M., Edsman, K., Controlled drug release from gels using lipophilic interactions of charged substances with surfactants and polymers (2002) J. Colloid Interface Sci., 248, pp. 194-200 
504 |a Alhaique, F., Carafa, M., Coviello, T., Murtas, E., Riccieri, F.M., Santucci, E., Release from a polysaccharide matrix: Effect of the molecular weight of the drug (1993) Acta Technol. Legis Med., 4, pp. 21-30 
504 |a Möckel, J., (1990) Mechanismus Kontinuierlicher und Gepulster Arzneistoffreisetzung aus Hydrokolloidmatrices, , Ph.D. Thesis, Heinrich-Heine Universität, Düseldorf, Germany 
504 |a Bonferoni, M.C., Rossi, S., Tamayo, M., Pedraz, J.L., Domínguez-Gil, A., Caramella, C., On the employement of λ-carrageenan in a matrix system. II. λ-Carrageenan and hydroxypropylmethylcellulose mixtures (1994) J. Control. Release, 30, pp. 175-182 
504 |a Grassi, M., Lapasin, R., Pricl, S., A study of the rheological behavior of scleroglucan weak gel systems (1996) Carbohydrate Polym., 29, pp. 169-181 
504 |a Suggett, A., Water, B., (1975) A Comprehensive Treatise, 4, p. 531. , Franks F. New York: Plenum 
504 |a Amsden, B., Solute diffusion within hydrogels. Mechanisms and models (1998) Macromolecules, 31, pp. 8382-8395 
504 |a Ritger, P.L., Peppas, N.A., A simple equation for description of solute release. II. Fickian and anomalous release from swellable devices (1987) J. Control. Release, 5, pp. 37-42 
504 |a Doublier, J.L., Launay, B., Cuvelier, G., Viscoelastic properties of food gels (1992) Viscoelastic Properties of Foods, , M.A. Rao, & J.F. Steffe. Oxford: Elsevier. Ch. 14 
504 |a Frangou, S.A., Morris, E.R., Rees, D.A., Richardson, R.K., Ross-Murphy, S.B., Molecular origin of xhantan solution rheology: Effects of urea on chain conformation and interactions (1982) J. Polym. Sci.: Polym. Lett. Ed., 20, pp. 531-538 
504 |a Ikeda, S., Nishimari, K., 'Weak gel'-type rheological properties of nonaggregated k-carrageenan helices (2001) J. Agric. Food Chem., 49, pp. 4436-4441 
504 |a Harrison, Franks, G.V., Tirtaatmadja, V., Boger, D.V., Suspensions and polymers - Common links in rheology (1999) Korea-Australia Rheol. J., 11, pp. 197-218 
504 |a Stauffer, D., Coniglio, A., Adam, M., Gelation and critical phenomena (1982) Adv. Polym. Sci., 44, pp. 103-158 
504 |a Axelos, M.A.V., Lefebvre, J., Qiu, C.-G., Rao, M.A., Rheology of pectin dispersions and gels (1991) The Chemistry and Technology of Pectin, , R.H. Walter. San Diego, CA: Academic Press. Ch. 11 
504 |a Schramm, G., (1994) A Practical Approach to Rheology and Rheometry, p. 130. , Germany: Gebrueder Haake Gmbh 
504 |a Barreiro-Iglesias, R., Alvarez-Lorenzo, C., Concheiro, A., Incorporation of small quantities of surfactants as a way to improve the rheological and diffusional behavior of carbopol gels (2001) J. Control. Release, 77, pp. 59-75 
506 |2 openaire  |e Política editorial 
520 3 |a The structure of scleroglucan gel matrices was characterized by dynamic rheological studies. The results were compared with the release kinetics of theophylline in analogous samples using a Franz diffusion cell, fitting the drug release data with a semi-empirical power law. Dynamic rheology gave information about the viscous and elastic components (loss and storage moduli, respectively) of the gel which could influence the drug-release profiles. Scleroglucan gels showed two structural transitions within the gel regime that coincided with changes in the release pattern. It was found that the introduction of 0.4% (w/w) of theophylline decreased the loss and storage moduli in the 2% (w/w) scleroglucan gels by 50%. The influence of the same wt.% theophylline in other gels was strongly dependent on the gel concentration. These results demonstrated the value of rheological studies to detect matrix structural changes produced by the inclusion of drugs which may modify the drug-release profile. © 2003 Elsevier B.V. All rights reserved.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires, UBACyT I007 
536 |a Detalles de la financiación: D.L. Bernik is Member of the National Research Council, CONICET. The research was supported by University of Buenos Aires, grant UBACyT I007 and FOMEC. The authors thank Professor Lı́a Gerschenson for useful discussions. 
593 |a Lab. de Quim. de Sist. Heterogeneos, Facultad de Ingeniería, Universidad de Buenos Aires, Paseo Colón 850, C1063ACV Buenos Aires, Argentina 
593 |a Departamento de Industrias, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina 
593 |a Inst. Quim. Fis. Mat., Ambiente y E., INQUIMAE, Universidad de Buenos Aires, 3er Piso, C1428EHA Buenos Aires, Argentina 
690 1 0 |a DRUG RELEASE 
690 1 0 |a DYNAMIC RHEOLOGY 
690 1 0 |a HYDROPHILIC MATRICES 
690 1 0 |a SCLEROGLUCAN 
690 1 0 |a ELASTICITY 
690 1 0 |a GELS 
690 1 0 |a REACTION KINETICS 
690 1 0 |a RHEOLOGY 
690 1 0 |a VISCOSITY 
690 1 0 |a FRANZ DIFFUSION CELLS 
690 1 0 |a CONTROLLED DRUG DELIVERY 
690 1 0 |a SCLEROGLUCAN 
690 1 0 |a THEOPHYLLINE 
690 1 0 |a ARTICLE 
690 1 0 |a DRUG RELEASE 
690 1 0 |a DRUG STRUCTURE 
690 1 0 |a ELASTICITY 
690 1 0 |a FLOW KINETICS 
690 1 0 |a GEL 
690 1 0 |a PRIORITY JOURNAL 
690 1 0 |a VISCOSITY 
700 1 |a Rojas, A.M. 
700 1 |a Daraio, Marta Edit 
700 1 |a Bernik, D.L. 
773 0 |d Elsevier, 2003  |g v. 90  |h pp. 355-362  |k n. 3  |p J. Control. Release  |x 01683659  |w (AR-BaUEN)CENRE-5509  |t Journal of Controlled Release 
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