Date of Publication
1-2022
Document Type
Master's Thesis
Degree Name
Master of Science in Chemistry
Subject Categories
Chemistry
College
College of Science
Department/Unit
Chemistry
Thesis Advisor
Drexel H. Camacho
Defense Panel Chair
Emmanuel V. Garcia
Defense Panel Member
Virgilio D. Ebajo, Jr.
Pamela Raye M. Tadeo
Abstract/Summary
Quercetin is an important drug that exhibits antioxidant, anti-cancer, anti-inflammatory, and antiviral effects that has been also used in treating cardiovascular diseases. However, its insolubility, low bioavailability, short biological half-life, and instability pose a problem in delivering it to the body. To improve its bioavailability, this work encapsulates quercetin in metal-alginate matrices consisting of Ca2+, Zn2+ and a combination of the two ions for a site-specific and controlled release. Quercetin-loaded hydrogels were formed via a dropwise addition of quercetin-alginate mixture into the metal bath to afford a yellow-colored spherical hydrogel. Successful encapsulation of quercetin was confirmed by FTIR, TGA, DSC, SEM-EDS, and UV-vis with encapsulation efficiency as high as 92.57±0.31% for the bimetal-alginate system. The drug release profile in physiological pH simulating gastric (pH 1.2) and intestinal (pH 8.2) conditions revealed that most of the drug remains in the hydrogel protected from the harsh acidic condition of the stomach and preferential full release at simulated intestinal fluid (SIF) was observed. The bimetal-alginate matrix showed the most controlled release of drug in SIF. The study reveals the potential of the drug delivery system for efficient oral therapy of quercetin, ensuring a controlled and targeted release in simulated intestinal conditions where absorption into the bloodstream occurs
Abstract Format
html
Language
English
Format
Electronic
Physical Description
xii, [100 leaves]
Keywords
Quercetin; Drug delivery systems; Alginates; Colloids
Recommended Citation
Fajardo, T. C. (2022). Characterization of encapsulated quercetin in metal alginate hydrogels for drug delivery system. Retrieved from https://animorepository.dlsu.edu.ph/etdm_chem/3
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Embargo Period
2-24-2023