rebaudioside-a and Breast-Neoplasms

Hesperetin (HSP) has excellent biological activities with poor water solubility which limits its clinical development. In this study, we successfully prepared a novel, self-assembled micelle based on Rebaudioside A (RA) for oral delivery of HSP with improved bioavailability and therapeutic effects. We found that RA and HSP could be formylated into nanomicelles with particle sizes of 4.541 nm ± 0.048 nm. HSP was readily encapsulated into RA micelles and this improved its water solubility (to 12.74 mg/mL ± 0.28 mg/mL). The MTT results showed that RA-HSP enhanced the cytotoxicity, the clonal formation inhibitory activity, and cell migration inhibitory activity of HSP in human breast cancer MDA-MB-231 cells. The mechanism results showed that RA-HSP induced cell apoptosis by inducing the production of reactive oxygen species (ROS), destroying the mitochondrial membrane potential (MMP), and inhibiting the PI3K/Akt signaling pathway. Moreover, RA-HSP enhanced the anticancer activity, increased the oral bioavailability and tissue distribution of HSP in vivo. Moreover, the mechanism studies in vivo found that HSP inhibited PI3K/Akt signaling pathway with low side effects. These findings indicate that RA micelle formulations have great potential in oral drug delivery systems for the delivery of hydrophobic drugs.

Topics: Administration, Oral; Animals; Antineoplastic Agents, Phytogenic; Apoptosis; Biological Availability; Breast Neoplasms; Cell Line, Tumor; Cell Proliferation; Diterpenes, Kaurane; Drug Carriers; Drug Compounding; Drug Liberation; Female; Hesperidin; Humans; Membrane Potential, Mitochondrial; Mice; Micelles; Nanoparticles; Phosphatidylinositol 3-Kinases; Proto-Oncogene Proteins c-akt; Rats, Sprague-Dawley; Reactive Oxygen Species; Signal Transduction; Solubility; Tissue Distribution; Tumor Burden