Hepatoprotective, Antihyperglycemic and Cytotoxic Activities ofJacaranda acutifolia Leaf Extract
Objective: Leaves methanol extract of Jacaranda acutifolia Humb. and Bonpl. (JA) family Bignoniaceae was subjected to phytochemical investigation as well as antioxidant, hepatoprotective, cytotoxic and antihyperglycemic activities evaluation. 
Key findings: Eight compounds were identified: luteolin-7-O-β-D-glucuronide, luteolin-7-O-β-D-glucoside, aesculetin, luteolin, verbascoside, luteolin-7-O-β-D-glucuronide methyl ester, apigenin-7-O-β-D-glucuronide methyl ester and apigenin. JA revealed a potent antioxidant activity In vitro superior to vitamin E (DPPH assay; EC50 of 0.43 mg/mL). A potential cytotoxic activity was produced against hepatocellular (HepG2) and cervical (HeLa) carcinoma cells with IC50 of 6.05 and 16.7 μg, respectively. Treatment with JA extract inhibited the rise in alanine aminotransferase and aspartate aminotransferase by 33.6% and 36.8% respectively, reduced thiobarbituric acid by 35.7% and decreased the tamoxifen-induced elevation in tumor necrosis factor alpha (TNF-α) level by 42.86%. JA extract elicited a significant decrease in fasting blood glucose by -59.26%. 
Conclusions: Jacaranda acutifolia could be a natural source for antioxidant, hepatoprotective supplements and could provide a basis for a potential cytotoxic agent. The compounds isolated are responsible at least in part for the observed effects.