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dc.contributor.authorYang, S.*
dc.contributor.authorYin, X.*
dc.contributor.authorWang, C.*
dc.contributor.authorLi, H.*
dc.contributor.authorHe, Y.*
dc.contributor.authorXiao, T.*
dc.contributor.authorSun, L.*
dc.contributor.authorLi, J.*
dc.contributor.authorYork, Peter*
dc.contributor.authorHe, J.*
dc.contributor.authorZhang, J.*
dc.date.accessioned2016-11-23T17:56:33Z
dc.date.available2016-11-23T17:56:33Z
dc.date.issued2014
dc.identifier.citationYang S, Yin X, Wang C et al (2014) Release behaviour of single pellets and internal fine 3D structural features co-define the in vitro drug release profile. AAPS Journal. 16(4): 860-871.
dc.identifier.urihttp://hdl.handle.net/10454/10557
dc.descriptionNo
dc.description.abstractMulti-pellet formulations are advantageous for the controlled release of drugs over single-unit dosage forms. To understand the diffusion controlled drug release mechanism, the pellet structure and drug release from a single pellet (not at dose level) were studied using synchrotron radiation X-ray computed microtomography (SR-muCT) and a sensitive LC/MS/MS method. The purpose of this article is to introduce a powerful, non-invasive and quantitative technique for studying individual pellet microstructures and to investigate the relationship between the microstructure and drug release from single pellets. The data from the single pellet dissolution measurements demonstrated that the release profile of capsules containing approximately 1,000 pellets per unit dose was the summation of the release profiles of the individual pellets. The release profiles of single tamsulosin hydrochloride (TSH) pellets formed three groups when a cluster analysis was performed, and the dissolution rate of the individual pellets correlated well with the combined effects of the drug loading, volume and surface area of the pellets (R(2) = 0.9429). In addition, the void microstructures within the pellet were critical during drug release. Therefore, SR-muCT is a powerful tool for quantitatively elucidating the three-dimensional microstructure of the individual pellets; because the microstructure controls drug release, it is an important parameter in the quality control of multi-pellet formulations.
dc.language.isoen
dc.subjectCapsules
dc.subjectChemistry
dc.subjectChromatography
dc.subjectImage processing
dc.subjectImaging
dc.subjectKinetics
dc.subjectMass spectrometry
dc.subjectSolubility
dc.subjectSynchrotrons
dc.subjectX-ray microtomography
dc.titleRelease behaviour of single pellets and internal fine 3D structural features co-define the in vitro drug release profile
dc.status.refereedYes
dc.typeArticle
dc.type.versionNo full-text in the repository
dc.identifier.doihttps://doi.org/10.1208/s12248-014-9611-x
dc.openaccess.statusclosedAccess


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