Comparison of drug release from poly(lactide-co-glycolide) microspheres and novel fibre formulations

Christopher S J Campbell, M Begona Delgado-Charro, Olivier Camus, Semali Perera

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Abstract

Intraperitoneal cisplatin delivery has recently been shown to benefit ovarian cancer patients. Cisplatin-containing poly(lactide-co-glycolide) (PLGA) microspheres have been proposed for cisplatin delivery. The drug loading of cisplatin containing microspheres produced elsewhere is 3 10 %w. Similar microspheres are reported here with a mean diameter of 38.8 μm, and a drug loading of 11.7 %w, but using ethyl acetate as a safer solvent. In addition, novel formulations of cisplatin-containing solid and hollow PLGA 65:35 (lactide:glycolide) fibres were prepared and are reported here for the first time. PLGA hollow fibres were produced by phase inversion with a high drug loading of 27 %w. Mechanistic mathematical models were applied to the cisplatin release profiles to allow quantitative comparison of microsphere, solid fibre and hollow fibre formulations. The diffusion coefficient of cisplatin eluting from a typical batch of PLGA microspheres was 4.8×10 13 cm2 s-1; this low diffusivity of cisplatin in microspheres was caused by the low porosity of the polymer matrix. The diffusion coefficients of cisplatin eluting from a batch of PLGA solid fibres and hollow fibres were 6.1×10 10 and 3.3×10 10 cm2 s-1, respectively. These fibres allowed the controlled release of high doses of cisplatin over four days and may represent an improvement in slow release technology for treatment of ovarian cancer.

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Polyglactin 910
Microspheres
Cisplatin
Fibers
Pharmaceutical Preparations
Polymer matrix
Porosity
Mathematical models
polylactic acid-polyglycolic acid copolymer

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Comparison of drug release from poly(lactide-co-glycolide) microspheres and novel fibre formulations. / Campbell, Christopher S J; Delgado-Charro, M Begona; Camus, Olivier; Perera, Semali.

In: Journal of Biomaterials Applications, Vol. 30, No. 8, 01.03.2016, p. 1142-1153.

Research output: Contribution to journalArticle

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abstract = "Intraperitoneal cisplatin delivery has recently been shown to benefit ovarian cancer patients. Cisplatin-containing poly(lactide-co-glycolide) (PLGA) microspheres have been proposed for cisplatin delivery. The drug loading of cisplatin containing microspheres produced elsewhere is 3 10 {\%}w. Similar microspheres are reported here with a mean diameter of 38.8 μm, and a drug loading of 11.7 {\%}w, but using ethyl acetate as a safer solvent. In addition, novel formulations of cisplatin-containing solid and hollow PLGA 65:35 (lactide:glycolide) fibres were prepared and are reported here for the first time. PLGA hollow fibres were produced by phase inversion with a high drug loading of 27 {\%}w. Mechanistic mathematical models were applied to the cisplatin release profiles to allow quantitative comparison of microsphere, solid fibre and hollow fibre formulations. The diffusion coefficient of cisplatin eluting from a typical batch of PLGA microspheres was 4.8×10 13 cm2 s-1; this low diffusivity of cisplatin in microspheres was caused by the low porosity of the polymer matrix. The diffusion coefficients of cisplatin eluting from a batch of PLGA solid fibres and hollow fibres were 6.1×10 10 and 3.3×10 10 cm2 s-1, respectively. These fibres allowed the controlled release of high doses of cisplatin over four days and may represent an improvement in slow release technology for treatment of ovarian cancer.",
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