Abstract

Bovine cutaneous fibropapillomas are benign skin tumours characterized by epithelial and dermal proliferation and induced by Bovine papillomaviruses (BPVs). Cyclooxygenase (COX) 1 and 2 are enzymes involved in pathological conditions, such as inflammation and epithelial carcinogenesis. Here we investigated biochemically and immunohistochemically COX-2 expression in bovine cutaneous fibropapillomas. Eight of twelve fibropapillomas (67%) showed COX-2 positive immunosignal mostly in the cytoplasm of the basal cell layer, while the normal skin did not stain. Biochemical analysis confirmed the expression of COX-2 in tumour samples. This study shows COX-2 expression in cutaneous fibropapillomas, suggesting a contribution in epithelial tumour development.

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