BCL2 and neoplasm: Despite receiving half of the overall dose compared to the free drugs, the combined doxorubicin/ piperlongumine-chitosan nanoparticles treatment was the most efficient in reducing tumor volume; down-regulating Cyclin D1, and BCL2; as well as the Beclin-1, and Cyclophilin A genes modulating growth, apoptosis, autophagy, and metastasis, respectively; up-regulating the Glutathione peroxidase expression as a defense mechanism protecting from oxidative damage.