ABSTRACT
Abstract Creating experimental models for obtaining stem cells from adipose tissue is necessary to elucidate their peculiar features. Objective: This study proposed a reliable reproducible and consistent experimental model for obtaining mesenchymal stem cells from adipose tissue. Material and Method: Lines of New Zealand rabbits, Wistar rats and CaviaPorcellus guinea pigs (4 animals per species) were used. Fatty tissue mesenchymal stem cells were removed from dorsal, epididymal and inguinal regions. Percentage viable cells and percentage cells expanded and submitted to chondrogenic differentiation were compared by animal species and collection site. Results: Chondrogenic differentiation occurred in a similar manner across all samples, independently of animal species or collection site. Among samples assessed, the inguinal region of rats yielded the highest percentage of viable and expanded cells. Conclusion: A reliable, reproducible and consistent model for obtaining mesenchymal stem cells was produced. Of the several variables analysed, the best results were obtained from the inguinal region of the rat.