Genistein as a Chemo-modulatory Agent: Exploring its Potential in Chemosensitization and Combinatorial Therapeutic Strategies for Cancer Treatment

Genistein (GEN), a phytoestrogen primarily sourced from soy plants, is recognized for its anticancer properties attributed to its roles as a tyrosine kinase inhibitor, an estrogen receptor agonist, and its influence on various cancer hallmarks by modulating diverse signaling pathways. Recent research has highlighted the considerable potential of GEN in combating drug resistance in cancer cells. This attribute of GEN has been demonstrated by its capacity to modulate tyrosine kinases such as HER2, HER3, and EGFR which are implicated in tumorigenesis, as well as prosurvival signaling pathways including NF-κB and Akt/mTOR. Moreover, GEN impacts drug accumulation, AR-driven transcriptional regulation, ER signaling, and various genes that are involved in autophagy, pro/anti-apoptosis, DNA methylation, and histone acetylation. Further, GEN demonstrated efficacy in combinatorial therapy with various standard anticancer agents like 5-FU, cetuximab, cisplatin, clofarabine, doxorubicin, tamoxifen, TRAIL, trastuzumab, and other agents with anticancer activities such as capsaicin, curcumin, daidzein, lycopene, resveratrol, sulforaphane, etc., across a spectrum of cancers including the cancers of bone, brain, breast, cervix, colorectal, endometrium, esophagus, head and neck, leukemia, liver, lung, ovary, pancreas and stomach. Thus, further clinical validation of these potential combinations involving GEN is warranted to confirm the preclinical findings.