title: Effects of Obesity and Obesity-Related Molecules on Canine Mammary Gland Tumors.
abstract: Obesity can affect the clinical course of a number of diseases, including breast cancer in women and mammary gland tumors in female dogs, via the secretion of various cytokines and hormones. The objective of this study was to examine the expression patterns of obesity-related molecules such as aromatase, leptin, and insulin-like growth factor 1 receptor (IGF-1 R) in canine mammary carcinomas (CMCs) on the basis of the body condition score (BCS). Comparative analyses of the expression of these molecules, together with prognostic factors for CMCs, including hormone receptors (HRs; estrogen and progesterone receptors), lymphatic invasion, central necrosis of the tumor, and histologic grade, were performed on 56 CMCs. The mean age of CMC onset was lower in the overweight or obese group (8.7 ± 1.9 years) than in the lean or ideal body weight group (10.4 ± 2.7 years). The proportion of poorly differentiated (grade III) tumors was significantly higher in the overweight or obese female dogs. Aromatase expression was significantly higher in the overweight or obese group and was correlated with the expression of HRs (P = .025). These findings suggest that overweight or obese status might affect the development and behavior of CMCs by tumor-adipocyte interactions and increased HR-related tumor growth.
authors.affiliation: Department of Veterinary Pathology, Small Animal Tumor Diagnostic Center, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea.
authors.forename: H-Y
authors.initials: HY
authors.lastname: Lim
authors.affiliation: Department of Veterinary Pathology, Small Animal Tumor Diagnostic Center, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea.
authors.forename: K-S
authors.initials: KS
authors.lastname: Im
authors.affiliation: Department of Veterinary Pathology, Small Animal Tumor Diagnostic Center, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea.
authors.forename: N-H
authors.initials: NH
authors.lastname: Kim
authors.affiliation: Department of Veterinary Pathology, Small Animal Tumor Diagnostic Center, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea.
authors.forename: H-W
authors.initials: HW
authors.lastname: Kim
authors.affiliation: Department of Veterinary Pathology, Small Animal Tumor Diagnostic Center, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea.
authors.forename: J-I
authors.initials: JI
authors.lastname: Shin
authors.affiliation: College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Republic of Korea.
authors.forename: J-Y
authors.initials: JY
authors.lastname: Yhee
authors.affiliation: Department of Veterinary Pathology, Small Animal Tumor Diagnostic Center, College of Veterinary Medicine, Konkuk University, Gwangjin-gu, Seoul, Republic of Korea jsur@konkuk.ac.kr.
authors.forename: J-H
authors.initials: JH
authors.lastname: Sur
mesh_terms: D000818:Animals; D001141:Aromatase / Q000378:metabolism; D001943:Breast Neoplasms / Q000378:metabolism / Q000473:pathology / Q000662:veterinary*; D004285:Dogs; D005260:Female; D020738:Leptin / Q000378:metabolism; D008321:Mammary Glands, Animal / Q000378:metabolism; D015674:Mammary Neoplasms, Animal / Q000378:metabolism / Q000473:pathology*; D009765:Obesity / Q000662:veterinary*; D017526:Receptor, IGF Type 1 / Q000378:metabolism; D011960:Receptors, Estrogen / Q000378:metabolism; D011980:Receptors, Progesterone / Q000378:metabolism
chemical_list: D020738:Leptin; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D001141:Aromatase; D017526:Receptor, IGF Type 1
keywords: aromatase; canine; estrogen receptor; insulin-like growth factor 1 receptor; mammary gland tumor; obesity; progesterone receptor