ABSTRACT
Abstract Objective: Myofibroblasts have been associated with the development of several pathologic fibrotic conditions. This longitudinal study aims to assess the proliferative and antiapoptotic effects of cyclosporin, nifedipine and phenytoin on gingival connective tissue cells of nonhuman primate, as well as to analyze a possible role of myofibroblasts in gingival overgrowth. Materials and Methods: Gingival samples from the right superior canine area were obtained from 12 male monkeys ( Sapajus spp ) to comprise the control group. After one week, the animals were randomly assigned to three groups, which received daily oral doses of cyclosporin, nifedipine or phenytoin for 120 days. Gingival samples were collected from the left superior canine area of two animals of each group at 52 and 120 days. Histological sections were stained with hematoxylin and eosin, and immunoreacted against α-SMA, Ki- 67 and bcl-2. Results: α-SMA immunoreaction was negative in the control and experimental groups. Similarly, no difference between groups concerning immunostaining against Ki-67 and bcl-2 was observed in connective tissue cells. Conclusion: Based on this methodology, it may be concluded that gingival overgrowths induced by cyclosporin, nifedipine and phenytoin are not associated with neither myofibroblast transdifferentiation, proliferation nor apoptosis of gingival connective cells in monkeys.
Subject(s)
Animals , Male , Phenytoin/pharmacology , Nifedipine/pharmacology , Cyclosporine/pharmacology , Cell Transdifferentiation/drug effects , Myofibroblasts/drug effects , Gingiva/cytology , Biopsy , Immunohistochemistry , Random Allocation , Longitudinal Studies , Actins/analysis , Haplorhini , Apoptosis/drug effects , Gingival Overgrowth/chemically induced , Gingival Overgrowth/pathology , Ki-67 Antigen/analysis , Ki-67 Antigen/drug effects , Genes, bcl-2/drug effects , Cell Proliferation/drug effects , Myofibroblasts/cytology , Gingiva/drug effectsABSTRACT
A Hiperplasia Estromal Pseudoangiomatosa (PASH) é uma doença benigna caracterizada pela proliferação excessiva de fibroblastos e miofibroblastos, podendo levar a um crescimento mamário importante. A apresentação é rara, em especial ocasionando necessidade de mastectomia em pacientes jovens. O estudo apresentou o relato de caso raro de uma paciente de 11 anos de idade, com hipertrofia mamária de rápida progressão, com necessidade de mastectomia e posteriormente mamoplastia de aumento para completa reinserção social.
Pseudoangiomatous stromal hyperplasia is a benign disease characterized by excessive proliferation of fibroblasts and myofibroblasts, which can lead to significant breast growth. The presentation is rare, especially among young women and cases requiring mastectomy. This report describes a rare case of an 11-year-old female patient with rapidly progressing mammary hypertrophy, who needed mastectomy and then mammoplasty for complete social integration.