1996
DOI: 10.1023/a:1016035229961
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Abstract: This study provides the first visual observation of the morphological changes of the GLIADEL(R) wafer during erosion of the polyanhydride matrix and release of the drug substance BCNU. The observations in this study support the conclusion that BCNU release from a polyanhydride wafer is controlled both by diffusion of the drug and erosion of the polymer matrix.

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Cited by 98 publications
(26 citation statements)
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“…Combined properties of aliphatic and aromatic polyanhydride have been used to get the copolymer with improved mechanical characteristics and adjustable erosion times. The most successful polyanhydride is a copolymer of P(CPP:SA) and has been reported to erode at a constant rate [2,95] . Erosion velocity of P(CPP:SA) decreases with increasing CPP content.…”
Section: In Vitro Degradation and Erosion Of Polyanhydridesmentioning
confidence: 99%
See 1 more Smart Citation
“…Combined properties of aliphatic and aromatic polyanhydride have been used to get the copolymer with improved mechanical characteristics and adjustable erosion times. The most successful polyanhydride is a copolymer of P(CPP:SA) and has been reported to erode at a constant rate [2,95] . Erosion velocity of P(CPP:SA) decreases with increasing CPP content.…”
Section: In Vitro Degradation and Erosion Of Polyanhydridesmentioning
confidence: 99%
“…Aliphatic monomers such as SA will most likely participate in the β -oxidation pathway yielding acetyl -coA which could be used in a typical biosynthetic pathway, while aromatic monomers are eliminated without further metabolic transformation [111] . Dang et al studied surface erosion of Gliadel wafers during in vivo degradation in rat brain as well as during in vitro degradation in phosphate -buffered saline [2] . Morphological changes of the wafer during erosion were studied and SEM was used to present a visual proof of the erosion process.…”
Section: In Vivo Degradation and Elimination Of Polyanhydridesmentioning
confidence: 99%
“…A degradação destes sistemas depende de sua MM e ocorre praticamente por erosão, obedecendo a cinética de ordem zero para os princípios ativos incorporados [67,68] . A sua eliminação do organismo requer a degradação do polímero em moléculas solúveis em água, que são posteriormente excretadas [69] . Os polianidridos são compostos, em geral, por monômeros de um diácido hidrossolúvel, cuja eliminação por dissolução é lenta [70] .…”
Section: Polianidridos Alifáticosunclassified
“…First, a large open wound is required to administer drugs inside the body. For example, Gliadel wafers® are discshaped polymer wafers with 1.4 cm in diameter and 1 mm in thickness which are approved by FDA for brain cancer treatment [1]. Smaller depots, for example, millirods with 1.6 mm in diameter required a 14-gauge tissue biopsy needle for the implantation [2].…”
Section: Introductionmentioning
confidence: 99%