Blood sample were

collected into sodium citrate-coated vials, plasma was Regorafenib concentration separated for coagulation parameters, such as prothrombin time (PT), activated partial thromboplastin time (APTT), fibrinogen (FIB) and thrombin time (TT), using a semi-automated coagulation analyzer (STA-4, Stago Co., Ltd.). The blood biochemical parameters including alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), total protein (TP), albumin (ALB), urea nitrogen (BUN), creatinine (CRE), total cholesterol (TCHO), glucose (GLU), total bilirubin (TBIL), triglyceride (TG), creatine kinase (CK), lactate dehydrogenase (LDH) and uric acid (UA) were determined using an automatic biochemistry meter (SELECRTA-E, Vital Scientific). K+, Na+, Cl- and Ca2+ were determined using the ion-selective electrode method with an AC980 electrolyte analysis instrument (Audicom Medical Instruments Co., Ltd.). After blood collection, the

animals were sacrificed and the organs, including brain, spinal cord, pituitary, sternum, thymus, thyroid, parathyroid, esophagus, salivary glands, stomach, small/large intestines, liver, pancreas, kidneys, adrenals, spleen, heart, trachea, lungs, aorta, testes, epididymis, uterus, ovaries, female mammary gland, prostate, urinary bladder, lymph nodes, sciatic nerve and caudal vein (injection site) were isolated for histological ABT-888 cell line examination. We also determined the absolute and relative organ weights (based on terminal body weights) for the brain, heart, liver, spleen, kidneys, lungs. The relative organ weights were calculated as follows:Relative organ weight=Absolute organ weight (g)/Body weight (g) × 100%. (1) For the histological examination,

all organs and tissues were fixed in 10% formalin, dehydrated with varying grades of alcohol, embedded in paraffin, cut into standard thick sections and Atorvastatin stained with hematoxylin-eosin dye for microscopic observation. All data are expressed as the mean ± standard error of the mean (S.E.M) and comparisons among different groups were performed by analysis of variance using an ANOVA test and DAS 1.0 statistical software. The LD50 value was determined according to the Bliss method (Bliss, 1938). The mortality as well as the acute toxicity increased progressively as the dose increased from 41 to 100 mg/kg (Table 1). All the animals in 100 mg/kg group died about 15s after administration. The main behavioral signs of toxicity observed were righting reflex disappearance, asthenia and locomotor activity reduction. The dying mice presented abdominal breathing, spasticity of hind limbs, tics and urinary incontinence. Histological investigation showed different degrees of degeneration in liver cells, protein-like substance in glomerulus sac and edema or acute haemorrhage in lungs.