title: Ki67/KIT double immunohistochemical staining in cutaneous mast cell tumors from Boxer dogs.
abstract: Cutaneous mast cell tumors (MCTs) are among the most frequent malignant tumors in dogs and Boxer breed dogs have a higher incidence of this disease. Ki67 staining and KIT staining are widely used to predict natural behavior in canine MCT but no previous study has evaluated double staining of these proteins as a prognostic factor. Based on biological behavior predictors in canine MCT, the purpose of this study was to determine the Ki67 proliferative index in KIT positive cells using double stain immunohistochemistry technique. Sixty-nine MCTs from Boxer dogs were selected and a tissue microarray was constructed for the double stained immunohistochemistry. Double positivity (Ki67(+)/KIT(+)) was observed in 20/69 (29%) MCT, with a mean of 9.06 double positive cells per tissue core (range 0.48%-43.97%) and Ki67(-)/KIT(+) animals had a longer survival time than Ki67(+)/KIT(+) animals (p=0.03).
authors.affiliation: Veterinary Clinic Department, School of Veterinary Medicine and Animal Science, Univ Estadual Paulista, UNESP, Botucatu, SP, Brazil.
authors.forename: Carlos Eduardo
authors.initials: CE
authors.lastname: Fonseca-Alves
authors.affiliation: Veterinary Clinic Department, School of Veterinary Medicine and Animal Science, Univ Estadual Paulista, UNESP, Botucatu, SP, Brazil.
authors.forename: Daniel Diola
authors.initials: DD
authors.lastname: Bento
authors.affiliation: Veterinary Clinic Department, School of Veterinary Medicine and Animal Science, Univ Estadual Paulista, UNESP, Botucatu, SP, Brazil.
authors.forename: Rafael
authors.initials: R
authors.lastname: Torres-Neto
authors.affiliation: Laboratório Werner & Werner Curitiba, PR, Brazil.
authors.forename: Juliana
authors.initials: J
authors.lastname: Werner
authors.affiliation: VCA Veterinary Care Referral Center, Albuquerque, NM, USA.
authors.forename: Barbara
authors.initials: B
authors.lastname: Kitchell
authors.affiliation: Veterinary Clinic Department, School of Veterinary Medicine and Animal Science, Univ Estadual Paulista, UNESP, Botucatu, SP, Brazil. Electronic address: renee@fmvz.unesp.br.
authors.forename: Renée
authors.initials: R
authors.lastname: Laufer-Amorim
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000378:metabolism* / Q000401:mortality; D004285:Dogs; D015972:Gene Expression Regulation, Neoplastic; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000235:genetics / Q000378:metabolism*; D034801:Mastocytoma / Q000378:metabolism / Q000401:mortality / Q000662:veterinary*; D011379:Prognosis; D019009:Proto-Oncogene Proteins c-kit / Q000235:genetics / Q000378:metabolism*; D013194:Staining and Labeling
chemical_list: D019394:Ki-67 Antigen; D019009:Proto-Oncogene Proteins c-kit
keywords: Boxer; Canine; Double immunohistochemistry; Mast cell tumor; Prognostic markers