Platelet counts (PLT) were performed using a hemocytometer

(Neubauer chamber) with 10% ammonium oxalate (Merck, Darmstadt, Germany) as diluent. Blood smears stained with May-Grünwald Giemsa (BioClin/Quibasa, Belo Horizonte, Brazil) were prepared for direct examination of red blood cell morphology, platelet morphology and leukocyte differential counts under light microscopy. Reticulocyte counts (Retic) were also determined in blood smears with Brilliant Cresyl Blue (Laborclin, Paraná, Brazil) staining immediately after blood collection. Retic values were expressed as the % of total RBC counts. Blood coagulation parameters (activated partial thromboplastin time [aPTT] and fibrinogen Compound Library concentration [FBG]) were measured in plasma that

had been collected with trisodium citrate by following a previously described protocol (Berger et al., 2010a). All animals from the control and envenomed groups (at each sampling time) were necropsied and gross macroscopic Venetoclax alterations were examined. The kidneys, spleen, liver, heart, lungs, brain, cerebellum and skin (at the site of venom injection) were then carefully removed and fixed in a 10% neutral buffered formaldehyde solution. The tissues were dehydrated in gradual alcohol from 50% to 100%, cleared in xylene and embedded in paraffin. Subsequently, the samples were sectioned and stained with hematoxylin and eosin (H&E) for further analysis by light microscopy. The in vitro myotoxic activity assays were performed as previously described ( Melo and Suarez-Kurtz, 1988 and Fuly et al., 2003). Briefly, rats were anesthetized (as described above) and the extensor digitorum longus (EDL) muscles were carefully dissected, weighed and transferred to a bath chamber with a 2.5 mL capacity. The Thymidylate synthase muscles were superfused continuously with a physiological solution (135 mM NaCl; 5 mM KCl, 2 mM CaCl2; 1 mM MgCl2; 1 mM NaHPO4; 15 mM NaHCO3 and 11 mM dextrose, pH = 7.35) that was equilibrated

with 95% O2/5% CO2. During superfusion, different concentrations of the LOBE (40 and 80 μg/mL), or the LOBE (40 μg/mL) that had been previously incubated with ALS (800 μL), were added to the bath. Bothrops jararaca snake venom (Butantan Institute, São Paulo, Brazil), and Triton X-100 (Sigma–Aldrich, Saint Louis, MO, USA) were used as positive controls for muscle damage under the same conditions. Preincubation of the venom with antivenom was performed at room temperature 30 min prior to addition to the perfusion bath. Samples of the perfusate (0.4 mL) were collected at 30 min intervals over a total period of 120 min and replaced with fresh solution. The collected samples were stored at 4 °C and their creatine kinase (CK) activity was determined according to the procedure described above ( Subsection 2.5).