The effects of valproic acid on skin healing: experimental study in rats
ABSTRACT Purpose: To recognize the effects of valproic acid (VPA), an epigenetic drug, on the skin healing process. Methods: Sixty male Wistar rats were divided into two groups: the experiment treated with VPA (100 mg/kg/day); and the control, with 0.9% sodium chloride by gavage. Skin healing was st...
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Published in | Acta Cirúrgica Brasileira Vol. 37; no. 4 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia
01.01.2022
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Subjects | |
Online Access | Get full text |
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Summary: | ABSTRACT Purpose: To recognize the effects of valproic acid (VPA), an epigenetic drug, on the skin healing process. Methods: Sixty male Wistar rats were divided into two groups: the experiment treated with VPA (100 mg/kg/day); and the control, with 0.9% sodium chloride by gavage. Skin healing was studied in three moments (the third, the seventh, and the 14th day), evaluating the parameters: inflammatory reaction and its intensity (anti-LCA), angiogenesis (anti-CD34), collagen I and III (anti-collagen I, anti-collagen III and Picrosirius-red F3BA) and myofibroblasts (anti-alpha-AMS). Results: The inflammatory reaction was acute or sub-acute in both groups on the third day. On the seventh and the 14th day, chronic predominated in the control (p=0.006), and sub-acute in the experiment (p=0.020). There was a greater number of leukocytes in the group treated only on the third day (p=0.036). The number of vessels was lower in the treated group at the three times (p3=0.002, p7<0.001, and p14=0.027). Myofibroblasts were rare in the third day and moderate quantity in the remaining periods. Collagen I density was higher in the control at the three times (p<0.001) and collagen III in the treated group (p<0.001). Conclusions: VPA led to a more intense inflammatory reaction, decreased angiogenesis and collagen deposition, especially type I collagen. |
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Bibliography: | Conflict of interest: Nothing to declare. Authors’ contribution: Conception and design the study: Biondo-Simões MLP; Acquisition, analysis and interpretation of data: Biondo-Simões R, and Biondo-Simões MLP; Analysis and interpretation of data: Ioshii SO; Technical procedures: Biondo-Simões R, Biondo-Simões MLP, Robes RR, and Dall’Antonia MO; Histological examinations: Ioshii SO; Manuscript writing: Biondo-Simões R; Critical revision: Biondo-Simões MLP; Final approval of the version to be published: Biondo-Simões MLP. |
ISSN: | 0102-8650 1678-2674 |
DOI: | 10.1590/acb370403 |