Distinctive patterns of hyperplasia in transgenic mice with mouse mammary tumor virus transforming growth factor-α: Characterization of mammary gland and skin proliferations

S. A. Halter, P. Dempsey, Y. Matsui, M. K. Stokes, R. Graves-Deal, B. L.M. Hogan, R. J. Coffey

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95 Citations (Scopus)

Abstract

Eight lines of transgenic mice expressing a mouse mammary tumor virus (MMTV) human transforming growth factor-α (TGFα) fusion gene were established. Three lines with distinctive phenotypes are presented. All have proliferative changes of the mammary gland. One line has sebaceous gland hyperplasia of the skin. Five histologic patterns of mammary gland hyperplasia based on two of these lines were identified: cystic hyperplasia, solid hyperplasia, dysplasia, adenoma, and adenocarcinoma. Human TGFα mRNA and protein were produced in all patterns but appeared reduced in solid hyperplasia, dysplasia, and adenocarcinoma. TGFα immunoreactivity in the mammary tissue, cystic fluid, and serum did not show significant differences; hyperplasia developed in 65% of multiparous mice and 45% of virgin mice by 12 months of age. Adenocarcinoma developed in 40% of multiparous mice and 30% of virgin mice by 16 months of age. These transgenic lines may provide useful models of mammary and sebaceous gland hyperplasia analogous to human disease.

Original languageEnglish
Pages (from-to)1131-1146
Number of pages16
JournalAmerican Journal of Pathology
Volume140
Issue number5
Publication statusPublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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