Toll-Like Receptor 4 Expression in Human Breast Implant Capsules: Localization and Correlation with Estrogen Receptors

Plastic and Reconstructive Surgery
Francesco SegretoPaolo Persichetti

Abstract

Capsular contracture is the most common complication following breast augmentation and reconstruction. Myofibroblasts, which are specialized fibroblasts with contractile activity, are involved in its pathogenesis. Toll-like receptor 4 stimulation in fibroblasts induces transcription of genes involved in extracellular matrix remodeling and tissue repair; furthermore, it enhances sensitivity to transforming growth factor-β1 and promotes transition to myofibroblasts. 17β-Estradiol, by binding to its main receptors, α and/or β, increases the expression of toll-like receptor 4 and the production of proinflammatory mediators by macrophages; moreover, it promotes extracellular matrix production and myofibroblasts contraction and differentiation. The aim of the study was to investigate the expression of toll-like receptor 4 in breast implant capsules and its relationship with estrogen receptors. The study enrolled 30 women who underwent expander removal following breast reconstruction. Specimens were stained with hematoxylin and eosin, Masson trichrome, immunohistochemistry, and immunofluorescence for toll-like receptor 4, α-smooth muscle actin (a marker of myofibroblasts), estrogen receptor-α, and estrogen receptor-β. Toll-like recept...Continue Reading

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Citations

Apr 3, 2018·Plastic and Reconstructive Surgery·Francesco SegretoPaolo Persichetti
Jun 17, 2016·Plastic and Reconstructive Surgery·Francesco SegretoPaolo Persichetti
Feb 26, 2020·Plastic and Reconstructive Surgery·Giuseppe A G LombardoFerdinando Nicoletti

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