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  • Title: Immunohistochemical localization of parathyroid hormone-related protein in canine mammary tumors.
    Author: Okada H, Nishijima Y, Yoshino T, Grone A, Capen CC, Rosol TJ.
    Journal: Vet Pathol; 1997 Jul; 34(4):356-9. PubMed ID: 9240847.
    Abstract:
    Parathyroid hormone-related protein (PTHrP) was localized immunohistochemically in 58 canine mammary tumors (31 malignant, 27 benign) and adjacent normal or hyperplastic mammary tissue. PTHrP immunoreactivity was significantly enhanced by pretreatment with microwave heating in normal and neoplastic tissues. Epithelial cells of hyperplastic and neoplastic mammary tissues, myoepithelial cells, and metaplastic osteoblasts in mammary tumors stained moderately to strongly positive for PTHrP No significant difference between staining intensity for PTHrP and histologic pattern of mammary tumors was found. The presence of PTHrP in normal and neoplastic canine mammary tissues supports a pathophysiological role for PTHrP as a paracrine or autocrine hormone in the mammary gland.
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