Antihypertensive nano-ceuticales based on chitosan biopolymer: Physico-chemical evaluation and release kinetics

Publication date: 20 May 2016 Source:Carbohydrate Polymers, Volume 142 Author(s): Taskeen Niaz, Saima Shabbir, Shahid Manzoor, Asma Rehman, Abdur Rahman, Habib Nasir, Muhammad Imran Prime risk factor behind cardiovascular associated mortality and morbidity is hypertension. The main challenge with antihypertensive (AHT) drug therapy is their extreme hydrophobic nature and very low oral bio-availability; which result into higher dosage/frequency and associated side effects of drugs. The main objective of this study was to fabricate AHT nano-ceuticals in hydrophilic carriers of natural origin to improve drugs′ solubility, protection and sustained release. AHT nano-carrier systems (NCS) encapsulating captopril, amlodipine and valsartan were fabricated using chitosan (CS) polymer by ionic gelation assisted ultra-sonication method. Drug encapsulation efficiencies of 92±1.6%, 91±0.9% and 87±0.5% were observed for captopril, valsartan and amlodipine respectively. Scanning electron microscopy (SEM) based analysis had revealed that captopril loaded polymeric NCS were regular, smooth and without any agglomeration. FTIR analyses of drug loaded and empty NCS demonstrated that drugs were molecularly dispersed inside the nanoparticles via week hydrogen bonding. Captopril and valsartan have demonstrated grafting reaction with NH group of chitosan. Zeta sizer results had confirmed that average size of chitosan nanoparticles was below 100nm. Encapsulation of captopril ha...
Source: Carbohydrate Polymers - Category: Biomedical Science Source Type: research