Development of venetoclax with 2-hydroxypropyl-beta-cyclodextrin inclusion complex for improved bioavailability.

Cyclodextrin complexes loaded with venetoclax for improved solubility and therapeutic efficacy as repurposed drug. The venetoclax-cyclodextrin inclusion complex was prepared using kneading method. Primarily in-silico molecular docking study was performed to examine the possible interaction between venetoclax and hydroxypropyl-β-cyclodextrin (HP-β-CD) and extensively characterized. The in-vitro studies were performed using A-549 lung epithelial cancer cells. The in-vivo pharmaco-kinetic studies was performed on wistar rats. The aqueous solubility of venetoclax was increased upto 3.16 folds, as compared with pure venetoclax with entrapment efficiency (EE%) was determined 95.44 ± 0.3%. In-vitro cytotoxicity studies were carried on A-549 lung epithelial cancer cells, wherein BCL-2 receptors were highly over-expressed and IC 50 values for venetoclax and venetoclax- HP-β-CD complex was calculated at 24 and 48 hrs in the order of 1.241 µg/ml, 0.68 µg/ml and 0.757719 µg/ml, 0.6125 µg/mL, respectively. The oral bioavailability was increased 4.03 times compared to the pure drug. The venetoclax-HP-β-CD inclusion complexes showed the increased aqueous solubility with improved anticancer activities.Communicated by Ramaswamy H. Sarma.