Core-shell nanoparticulate formulation of gemcitabine: lyophilization, stability studies, and in vivo evaluation

Drug Delivery and Translational Research
Deepak ChitkaraNeeraj Kumar

Abstract

Core-shell nanoparticulate formulation of gemcitabine was prepared by incorporating gemcitabine in a hydrophilic bovine serum albumin (BSA) core surrounded by hydrophobic poly(DL-lactic acid-co-glycolic acid) (PLGA) shell with a particle size of 243 nm and encapsulation efficiency of 40.5 %. Prepared formulations were lyophilized, wherein several cryoprotectants were screened for product attributes such as cake appearance, reconstitution with water, and size constancy. Trehalose was screened as a lyoprotectant, which showed stability for 6 months at 5 °C and 25 °C/60 % relative humidity (RH) conditions. However, an increase in particle size was observed at accelerated conditions (40 °C/75 % RH). In vitro evaluation of these nano-formulations in MCF-7 breast cancer cells showed enhanced cellular uptake (90 %) as compared to GEMCITE® uptake (51 %) in 6 h along with reduced IC50 value at 72 h (16 μM versus 30 μM). In vivo studies in Sprague Dawley rats showed C max, t 1/2, and area under the curve (AUC) at 2.55 μg/ml, 13.6 h, and 28,322.5 μg/l/h, respectively, whereas GEMCITE® at the same dose showed significantly lower corresponding values at 1.94 μg/ml, 6.89 h, and 13,967 μg/l/h. In the same study, AUC and C max of inactive meta...Continue Reading

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Jul 13, 2016·European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences·Vaibhav KharePrem N Gupta

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