EFFECTS OF THE TREATMENT OF SOY ESTROGEN AND ISOFLAVONES ON THE TONGUE OF OVARIECTOMIZED RATS
DOI:
https://doi.org/10.18066/revistaunivap.v32i73.4608Keywords:
ovariectomy, estrogen replacement therapy, soy isoflavones, proliferative index, tongue epitheliumAbstract
The aim of the study was to analyze the effects of the hormone replacement therapy (HRT), of the treatment with soy isoflavone extract or the combined therapy on the thickness and the proliferative index of the tongue epithelium of ovariectomized rats. For the development of the research, 105 female rats were used, 84 of which were ovariectomized and 21 falsely operated (Sham). The ovariectomized rats were divided into four groups which received daily: Group OVX: filtered water; Group EST: 1.0mg/kg/day of β-estradiol 17-valerate; Group ISO: 15 mg/kg/day of soy isoflavone extract; and Group ASS: combined therapy. The treatment started on the day of the ovariectomy and continued until euthanasia, which occurred after 3, 5 and 8 weeks. The tongue was processed for routine histological analysis and immunohistochemistry of the proliferating cell nuclear antigen (PCNA). The thickness and the morphological aspects of the epithelium were evaluated. The tests ANOVA and Tukey demonstrated that the ovariectomy predominantly induced lower thickness and higher proliferative index. HRT presented some higher peaks of thickness. Soy extract demonstrated a higher proliferative index without statistical significance. The combined therapy presented a varied behavior. The effect of the treatments differed with the periods of the experiment and the evaluation of the local thickness. Only the proliferative index did not present significant differences.
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