Evaluation of the toxicokinetics and apoptotic potential of ethanol extract from Echinodorus macrophyllus leaves in vivo. 
This study evaluates the toxicological, genotoxic, mutagenic and apoptotic potential of an in vivo assay from Echinodorus macrophyllus extract (EEM).  The acute toxicity test used 02 groups (n = 5) of female Wistar rats: negative control group (saline) and experimental group (2000 mg/kg b.w.  EEM), both orally administered (gavage) at single doses and monitored for 14 days.  To assess the genotoxic, mutagenic and apoptotic potential, 50 male Swiss mice were divided into 5 groups (n = 10): Group I: negative control (saline solution 0.1 ml/10 g b.w.);  Group II: positive control (cyclophosphamide 100 mg/kg b.w.)  intraperitoneally administered; groups III-V received EEM at 500, 1000 and 2000 mg/kg b.w.,  respectively.  Groups I, III-V received oral administrations (gavage).  The results showed that there was no acute lethality or any signs of acute toxicity, indicating that LD50 is greater than 2000 mg/kg b.w.  The groups treated with EEM showed no genotoxic or mutagenic activity and did not induce apoptosis in the liver and kidney.  Therefore, EEM showed no acute toxicity and at doses of 500, 1000 and 2000 mg/kg b.w.  absence of genotoxicity, mutagenicity and no apoptotic events were observed.