Anticancer Potential of Wogonin: A Comprehensive Treatise

Wogonin (5,7-dihydroxy-8-methoxyflavone) is a natural flavonoid predominantly isolated in the roots of Scutellaria baicalensis Georgi. It has been recognized as an active phytochemical with specific therapeutic potential and significant pharmacological effects, especially in cancer research. Nevertheless, increasing preclinical data both in vitro and in vivo demonstrate its effectiveness against a broad spectrum of cancers, including breast, ovarian, lung, gastric, colorectal, prostate, renal, glioblastoma, and hematological types. Wogonin exerts its anticancer effects through a complex mechanism that involves the induction of programmed cell death (apoptosis), autophagic modulation, and cell cycle arrest. It also suppresses angiogenesis of tumors, epithelial-mesenchymal transition (EMT), invasion, metastasis, and multidrug resistance effects. The effects are supported by the compound's ability to regulate a variety of oncogenic and tumor-suppressive signaling pathways, particularly PI3K/Akt, STAT3, NF-kB, MAPK, AMPK, and Wnt/beta-catenin. It modulates apoptosis-related proteins (Bax, Bcl-2, PARP, caspases) and transcription factors. Wogonin has been shown to enhance the antitumor effects of established chemotherapeutic agents, and it works synergistically with these drugs in multiple cancer models, with the added benefits of reduced systemic toxicity. Nevertheless, it has poor oral bioavailability and water solubility, which limits its clinical application. Recent advances in nanocarriers and liposomal delivery systems show promise in overcoming pharmacokinetic challenges. This review consolidates available pharmacological, mechanistic, and pharmacokinetic evidence of wogonin, highlights its potential in combination therapies, and identifies research gaps and formulation strategies necessary for advancing this candidate towards clinical development as a novel anticancer agent.