Effect of propranolol on capsular reaction around silicone implants in guinea pigs

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Abstract

PURPOSE: To evaluate the effect of propranolol on capsular architecture around silicone implants by measuring the inflammation, capsular thickness, and collagen fiber density, using a guinea pig experimental model. METHODS: Thirty six adult male guinea pigs randomly divided into two groups (n=18) were used. Each one received a silicone implant with textured-surface. The capsular tissue around implants from untreated or treated animals with the beta-adrenoceptor antagonist propranolol (10 mg/kg, dissolved in daily water) were analyzed for inflammation by histological scoring, capsular thickness by computerized histometry, and collagen fibers type I and Type III density by picrosirius polarization at different time points (7, 14 or 21 days after silicone implantation). RESULTS: Propranolol treatment reduced inflammation and impaired capsular thickness and delayed collagen maturation around the textured implant. CONCLUSION: Propranolol reduces the risk of developing capsular contracture around silicone implants with textured surface.

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De Mesquita, C. J. G., Guimarães, S. B., Leite Filho, J. A. D., Macie, F. S., De Carvalho Rocha, J. L., & Leite, J. A. D. (2015). Effect of propranolol on capsular reaction around silicone implants in guinea pigs. Acta Cirurgica Brasileira, 30(1), 24–33. https://doi.org/10.1590/S0102-86502015001000004

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