alexa Histology surrounding cystotomy healing in a Sprague-Dawley rat model.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Tissue Science & Engineering

Author(s): Bilbao M, Spaniol A, Bearss J, Schellhase C, Shippey S,

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Abstract INTRODUCTION AND HYPOTHESIS: The purpose of this study was to histologically chronicle wound healing following cystotomy repair using a small animal model. METHODS: Thirty female Sprague-Dawley rats were included in this study. Twenty-eight rats underwent a vertical cystotomy in the bladder dome, which was repaired in a single continuous fashion. Two rats served as histological controls. Following cystotomy repair, groups of three to four rats were studied at single day intervals for 4 days, then at 2-day intervals until 10 days post-repair. The animal bladders were harvested and examined for inflammation, scar formation, and bladder healing. RESULTS: Thirty rat bladders were histologically examined. An inflammatory wound phase was observed during the first 4 days after wounding. Transition from acute to chronic inflammation was observed at day 2 with chronic inflammation persisting through day 10. Inflammation severity peaked 4 days post-wounding without regression through day 10. Evidence of proliferative phase wound healing was first observed 4 days post-wounding. CONCLUSION: Early increases in wound healing are due to inflammatory events such as fibrin plugging of the wound. Later developments after day 4 are due to wound proliferation, collagen deposition, and re-epithelialization. Additionally, wound healing in the rat bladder is observed on a continuum and not necessarily in discrete stages observed on precisely the same postoperative day in each animal. This article was published in Int Urogynecol J and referenced in Journal of Tissue Science & Engineering

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