**Background**
Colon cancer remains one of the most prevalent and lethal malignancies worldwide, characterized by uncontrolled cell proliferation and resistance to apoptosis. A key driver in the progression of this disease is the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling pathway. NF-κB is a pivotal transcription factor that regulates genes involved in inflammation, cell survival, and immune responses; its constitutive activation is frequently observed in various tumors, promoting tumor growth and metastasis. Consequently, targeting the NF-κB pathway has become a significant strategy for developing novel anticancer therapies. In this context, we will introduce a flavonoid-based inhibitor used in Tectochrysin Cancer research – Tectochrysin.
**Definition**
Tectochrysin is a major flavonoid isolated from Alpinia oxyphylla Miquel that acts as an inhibitor of NF-κB activity. According to the Tectochrysin description, it specifically binds to the p50 unit of the NF-κB complex to exert its biological effects.
**In Vitro and In Vivo Studies**
The Tectochrysin biological activity has been extensively evaluated in various cancer models. Tectochrysin in vitro studies demonstrate that the compound inhibits the phosphorylation of IκB, thereby concentration-dependently blocking the translocation of p50 and p65 into the nucleus. In colon cancer cell lines, Tectochrysin inhibits the growth of SW480 and HCT116 cells with IC50 values of 6.3 μg/mL and 8.4 μg/mL, respectively, after 24 hours of treatment (1, 5, 10 μg/mL). Morphological analysis indicates a reduction in cell size, and DAPI and TUNEL staining confirm the induction of apoptotic cell death, with apoptotic cell numbers increasing to 58% in SW480 and 54% in HCT116 cells upon treatment with 10 μg/mL. Notably, Tectochrysin is not cytotoxic to normal CCD-18co cells at the tested concentrations.
Further Tectochrysin In Vivo evaluations were conducted using HCT116 xenograft-bearing nude mice. Tectochrysin (NSC 80687) was administered i.p. twice per week for 3 weeks at a dose of 5 mg/kg. The results showed that the final tumor weights and volumes in the treated group were reduced to 57.9% and 46.4% of the vehicle group, respectively, without significant changes in the body weight of the mice. In conclusion, Tectochrysin is a potent NF-κB inhibitor that suppresses colon cancer cell growth and tumor progression by inducing apoptosis.
Keywords
Tectochrysin, 520-28-5, Techtochrysin, NSC 80687, NSC80687, NSC-80687, STAT, NF-κB, Nuclear factor-κB, Nuclear factor-kappaB, Inhibitor, inhibitor, inhibit
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