Importance of inserting a control group in assays using laboratory animals
DOI:
https://doi.org/10.22239/2317-269x.01433Keywords:
Laboratory Animals; Wistar Rats; Animal Experimentation; Reference Values; Control GroupAbstract
Introduction: The use of laboratory animals is essential in areas where they cannot yet becompletely replaced, such as toxicology. In studies that use, for comparison purposes, only data provided by the clinical analysis laboratories, in an attempt to reduce the number of animals in an experiment, there is the risk of using information that does not correspond
to reality. Objective: Discuss the use of control groups in animals’experiments. Method: This article compared the hematological and biochemical values of rats of the Wistar strain, obtained in three breeding facilities in different Brazilian states, with the results of animals from the Institute of Science and Technology in Biomodels of the Oswaldo Cruz Foundation, Rio de Janeiro, aiming at the discussion about decision-making on the inclusion of a control group in acute oral toxicity trials. Results: Few parameters showed no statistical differences, such as red blood cells in females (two references), hemoglobin in females (one reference) and males (one reference), hematocrit in males (two references) and mean corpuscular hemoglobin in females (two references), leukocytes in males (a reference); creatinine and ALT in all females. Conclusions: It is concluded that the use of the control group is necessary, when values analyzed preliminarily differ from those considered as references of the species
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