Preclinical and Molecular Docking Insights into the Chemopreventive Role of Fenugreek Seed Extract in a Murine Model of Colorectal Cancer

Abstract

Background/Objectives: Colorectal cancer (CRC) remains a leading cause of cancer-related mortality, necessitating the development of effective preventive strategies. Fenugreek (Trigonella foenum-graecum) possesses well-documented pharmacological properties; however, its chemopreventive potential in colorectal cancer (CRC) remains unexplored. This study evaluates the efficacy of methanolic fenugreek seed extract (FSE) in an azoxymethane (AOM)-induced murine colorectal cancer (CRC) model, focusing on the modulation of oxidative stress, regulation of biomarkers, induction of apoptosis, and maintenance of epithelial integrity. Methods: FSE was extracted using cold maceration (yield: 24%) and analyzed by gas chromatography–mass spectrometry (GC-MS), identifying 13 bioactive compounds, including benzene, 1,3-dimethyl-; 1,3-cyclopentadiene, 5-(1-methylethylidene)-; o-Xylene; benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-; and benzene, 1,2,3-trimethyl-. All 13 compounds identified were matched with the NIST library with high confidence. Molecular docking was used to assess the interactions of FSE bioactives with E-cadherin–β-catenin complexes. Swiss albino mice received an FSE pre-treatment before AOM induction and continued this treatment three times weekly for 21 weeks. Key assessments included survival analysis, body weight changes, serum biomarker levels (GGT, 5′-NT, LDH), antioxidant enzyme activities (SOD, CAT, GPx1, MDA), reactive oxygen species (ROS) quantification, apoptosis detection via flow cytometry, and immunofluorescence-based evaluation of E-cadherin dynamics. Results: FSE improved survival rates, mitigated AOM-induced weight loss, and dose-dependently reduced serum biomarker levels. Antioxidant enzyme activity was restored, while MDA levels declined. A dose-dependent increase in ROS facilitated apoptosis, as confirmed by flow cytometry (16.7% in the low-dose FSE group and 34.5% in the high-dose FSE group). Immunofluorescence studies revealed that FSE-mediated restoration of E-cadherin localization counteracted AOM-induced epithelial disruptions. Conclusions: FSE exhibits potent chemopreventive potential against CRC by modulating oxidative stress, regulating key biomarkers, inducing apoptosis, and restoring epithelial integrity. These findings support further investigations into its clinical relevance for CRC prevention.