Cancer remains one of the leading causes of morbidity and mortality worldwide, necessitating the search for effective preventive and therapeutic strategies. Recent research has highlighted the significant role of dietary bioactive compounds in cancer prevention and treatment. Broccoli (Brassica oleracea), a member of the cruciferous vegetable family, has been extensively studied for its potent anticancer properties, primarily attributed to its high content of phytochemicals such as sulforaphane (SFN) and indole-3-carbinol (I3C).
Sulforaphane, an isothiocyanate derived from glucoraphanin, exhibits multiple anticancer mechanisms, including the induction of apoptosis, inhibition of cell proliferation, and modulation of oxidative stress and inflammation. It has also been shown to inhibit histone deacetylase (HDAC) activity, leading to epigenetic regulation of tumor-suppressor genes. Additionally, sulforaphane activates the nuclear factor erythroid 2-related factor 2 (Nrf2) pathway, enhancing detoxification and cellular defense mechanisms against oxidative damage [1].
Indole-3-carbinol, a derivative of glucobrassicin, exerts its anticancer effects by modulating estrogen metabolism, reducing pro-inflammatory cytokine production, and interfering with key signaling pathways involved in tumor progression. Upon ingestion, I3C undergoes conversion to 3,3′-diindolylmethane (DIM), which has been found to downregulate NF-κB and COX-2 expression, reducing chronic inflammation associated with cancer progression [2].
The synergistic action of SFN and I3C has been demonstrated in various preclinical studies, showing enhanced inhibition of tumor cell growth and increased apoptosis rates when used in combination. Research suggests that these compounds may be particularly effective in preventing hormone-dependent cancers, such as breast and prostate cancer, while also showing promising results against colorectal, lung, and pancreatic cancers.
Despite their promising therapeutic potential, challenges remain regarding the bioavailability and stability of these compounds, necessitating further research into optimized delivery methods and clinical applications [3]. This review aims to provide a comprehensive analysis of the molecular mechanisms by which sulforaphane and indole-3-carbinol exert their anticancer effects, the findings from experimental and clinical studies, and the future potential of these compounds in cancer prevention and treatment.