STAT3 and liver cancer: Furthermore, it has been described that quercetin-derived inhibition of liver cancer cell growth could be mediated by the disruption of different pathways, including protein kinase B (Akt)/mammalian target of rapamycin (mTOR) [23,24], mitogen-activated protein kinase kinase 1 (MEK1)/extracellular signal-regulated kinase 1/2 (ERK1/2) [27,38] and Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) signaling routes [22].