Green tea catechins (GTCs)

Green tea catechins are a group of natural polyphenolic compounds derived from the leaves of the Camellia sinensis plant, with epigallocatechin gallate (EGCG) being the most abundant and biologically active constituent (Source: NIH NCCIH). While often discussed in therapeutic contexts, they are not biological targets themselves; rather, they are bioactive ligands that interact with a variety of cellular proteins, including enzymes, receptors, and transcription factors (Source: PubChem). Their biological utility is characterized by potent antioxidant, anti-inflammatory, and chemopreventive properties, which have been extensively studied for the prevention of cardiovascular disease and various cancers (Source: PubMed, PMID: 19103644). In clinical practice, a standardized mixture of these catechins is FDA-approved as a topical treatment (Sinecatechins) for external genital and perianal warts (Source: FDA, Veregen Label). However, high-dose oral consumption of green tea extracts has been associated with rare but clinically significant hepatotoxicity, and their low systemic bioavailability remains a primary challenge for broader pharmaceutical development (Source: LiverTox, NIH).

Other names

Green tea polyphenolsCamellia sinensis catechinsFlavan-3-olsTea flavonoids

Green tea catechins act as pleiotropic modulators rather than single-target agents. They inhibit enzymes such as dihydrofolate reductase (DHFR) and the 20S proteasome, bind to the 67-kDa laminin receptor (67LR), and modulate various signaling pathways including NF-κB, MAPK, and PI3K/Akt to exert anti-proliferative and anti-inflammatory effects (Source: PubMed, PMID: 28864167; PubChem CID 65064).