Antitumor Effects and Mechanism of n-butanol Fraction from Aril of Torreya grandis in H22 Mice

BACKGROUND To determine the antitumor effects and its mechanism of n-butanol fraction from aril of Torreya grandis (BFAT) on H22 mice models of liver cancer. MATERIALS AND METHODS Sixty ICR male mice were used to establish H22 mice models of liver cancer and then randomly divided into six groups, the normal control group, the model control group, the positive group (cyclophosphamide [CTX]), the BFAT-treated group (high, 4 g/kg, medium, 2 g/kg, and low, 1 g/kg). The animals were sacrificed 15 days after oral administration, and tumors were taken out for the tumor weights and antitumor rates, while thymus and spleen were taken for thymus index and spleen index. Blood in eyeball was collected for the determination of aspartate aminotransferase (AST), alanine aminotransferase (ALT), albumin (Alb), malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase enzyme (GSH-Px), tumor necrosis factor-α (TNF-α), interleukin-2 (IL-2), transforming growth factor-β1 (TGF-β1), and IL-10 in serum. Sections of tumor tissue were prepared, and morphological changes in tumor tissue cells were observed using hematoxylin and eosin staining technique. RESULTS Compared with the model control group, the tumor inhibition rate of the high-dose administered group is 60.15%, which is quite closed to the effect of CTX. Moreover, the tumor weight is decreased, the indexes of spleen, thymus were increased significantly. Furthermore, the administration of BFAT significantly enhanced the activities of TNF-α, IL-2, SOD, and GSH-Px and reduced the levels of AST, ALT, MDA, Alb, TGF-β1, and IL-10 (P < 0.01). CONCLUSIONS The results demonstrated that n-butanol fraction from aril of T. grandis showed out antitumor activity without obviously liver damage through potentiating immunologic function and antioxidant activity of tumor-bearing mice and which may become one potential as anticancer drug alternatives or supplements. SUMMARY High and medium groups could significant elevate the thymus and spleen indexes and the interleukin-2 and tumor necrosis factor-α level in serum of H22 micen-butanol fraction from aril of Torreya grandis (BFAT) could ameliorate the levels of aspartate aminotransferase, alanine aminotransferase and albumin to almost normal, and increase the concentrations of superoxide dismutase and glutathione peroxidase enzyme, decrease the malondialdehyde level in serum of mice significantlyBFAT may indirectly play the role of antitumor activity through improving immunologic functionBFAT had potent antitumor properties without obviously liver damage. Abbreviations used: DDP: Cisplatin; CTX: Cyclophosphamide; AST: Aspartate aminotransferase; ALT: Alanine aminotransferase; Alb: Albumin; MDA: Malondialdehyde; SOD: Superoxide dismutase; GSH-Px: Glutathione peroxide enzyme; TNF-α: Tumor necrosis factor-α; IL-2: Interleukin-2; TGF-β1: Transforming growth factor-β1; IL-10: Interleukin-10; HE: Hematoxylin and eosin; PBS: Phosphate-buffered saline; PFAT: Petroleum ether fraction from aril of Torreya grandis; EFAT: Ethyl acetate fraction from aril of Torreya grandis; BFAT: N-butanol fraction from aril of Torreya grandis.