The experimental animals were exposed to Pb acetate at 50 mg/kg (Sigma-Aldrich, St. Louis, MO, USA) [17 (link)] from the 35th day to the 90th postnatal day by intragastric gavage. The control group received distilled water (H2Odest.), in the same volume as the exposed group. Gavage administration was used by our group in different models of exposure to toxicants [57 (link),58 (link),59 (link)]. The animals were weekly weighed for dose adjustment and verification of possible changes in body mass due to metal effects.
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