التفاصيل البيبلوغرافية
| العنوان: |
Optimisation of the Microencapsulation of an Active Ingredient by Crosslinking and the Coating Method to Target Colon Diseases. |
| Alternate Title: |
Optimizacija mikrokapsulacije aktivnog sastojka umrežavanjem i metodom premazivanja za liječenje bolesti debelog crijeva. (Bosnian) |
| المؤلفون: |
Hammoudi, M., Atsamnia, D., Otmanine, K., Moumen, R., Oumouna, M. |
| المصدر: |
Kemija u Industriji; 2021, Vol. 70 Issue 5/6, p263-273, 11p |
| مصطلحات موضوعية: |
COLON diseases, MOLECULAR capsules, SODIUM alginate, BIOPOLYMERS, POLYMER solutions, MOLECULAR weights, MICROENCAPSULATION |
| Abstract (English): |
The aim of this study was to prepare microcapsules based on a natural polymer chitosan solution (high degree of deacetylation (DDA), low molecular weight (MW), and low viscosity)/sodium alginate in the presence of a crosslinking agent (glutaraldehyde), in order to encapsulate and vectorise the active principle towards the diseased organ (colon), without being diffused into other levels of the digestive tract, to increase the therapeutic effectiveness of treatment by chemotherapy and to reduce undesirable effects. The method of preparation of the microcapsules obtained from the sodium alginate/chitosan solution/active ingredients system was examined by conventional optical microscopy. In addition, an in vitro study was carried out on the active ingredients’ release profiles, depending on the pH simulating the gastric and intestinal media for the seven systems proposed. It should be mentioned that, in the basic medium (pH(colon) = 8), the release of the active ingredients is of the utmost importance. Nevertheless, control of this release can be improved by a crosslinking agent and the coating method. The dry [sodium alginate / chitosan solution / active ingredients + crosslinking 2 %] formulation coated with non-crosslinked chitosan (Formulation 7) is the standard formula that meets all the criteria from our earlier work, with a core release rate of 67 %. The PSD was unimodal, with sizes ranging from 750 µm to 900 µm. [ABSTRACT FROM AUTHOR] |
| Abstract (Bosnian): |
Cilj ove studije bio je pripremiti mikrokapsule na bazi prirodne polimerne otopine kitozana (visokog stupnja deacetiliranja (DDA), niske molekulske mase (MW) i niske viskoznosti)/natrijeva alginata u prisutnosti umreženog agensa (glutaraldehida), za inkapsuliranje i vektoriziranje aktivnog sastojka prema bolesnom organu (debelom crijevu), bez difuzije u druge razine probavnog trakta, kako bi se povećala terapijska učinkovitost liječenja kemoterapijom i smanjili neželjeni učinci. Metoda pripreme mikrokapsula dobivenih iz sustava natrijeva alginata/otopine kitozana/aktivnih sastojaka ispitana je uobičajenom optičkom mikroskopijom. Uz to, provedeno je istraživanje in vitro na profilima oslobađanja aktivnih sastojaka, ovisno o pH koji simulira želučani i crijevni medij za sedam predloženih sustava. Treba napomenuti da je u osnovnom mediju (pH(debelog crijeva) = 8) oslobađanje aktivnih sastojaka od najveće važnosti. Ipak, kontrola tog ispuštanja može se poboljšati sredstvom za umrežavanje i metodom premazivanja. Suha formulacija [otopina natrijeva alginata/kitozana/aktivnih sastojaka + umreženog 2 %] presvučena neumreženim kitozanom (formulacija 7) standardna je formula koja udovoljava svim kriterijima iz našeg ranijeg rada s brzinom otpuštanja jezgre od 67 %. PSD je bio unimodalan s veličinama koje su se kretale od 750 µm do 900 µm. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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