Designing idiosyncratic hmPCL-siRNA nanoformulated capsules for silencing and cancer therapy

In this work, we have designed a siRNA-nanoformulation with mesoporous polycaprolactone (hmPCL) for silencing and cancer therapy. Average hollow core size of hmPCL nanocapsules used for nanoformulation is similar to 180 nm with shell thickness of 10-20 nm and mesopore size of similar to 5-10 nm in diameter. Idiosyncratic capsules are biocompatible which has been confirmed with normal lymphocyte, K562 leukaemia cancer cells and on HepG2/EGFP cancer cells. In 1 mg of hmPCL capsules up to 400 ng of siRNA can be loaded. This nanoformulation enables to tune the dose dependent delivery up to similar to 93.25% (373 ng) siRNA during therapy. hmPCL-siRNA nanoformulation mediated siRNA transfection on HepG2 cancer cells has been investigated and exhibited 32% silencing activity within 24 h of post transfection. Obtained results directed us that the hmPCL-siRNA nanoformulation could be an efficient tool in siRNA mediated therapy for knocking down the infected cells. (C) 2015 Elsevier Inc. All rights reserved.