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Hormone interactions confer specific proliferative and histomorphogenic responses in the porcine mammary gland.

Abstract：

:Mammary gland growth and morphogenesis are regulated by interactions between hormones as much as by their individual actions. The effect of these interactions on the mammary gland phenotype in species other than rodents is relatively undefined. We investigated the individual and combined effects of estrogen (E), progestin (P), and prolactin (PRL) on mammary gland development in gilts. Pigs were shown to have a ductal-lobular parenchyma that underwent hormone-stimulated progression of terminal ductal lobular unit (TDLU) morphogenesis similar to that in the human breast. Ovariectomy plus hypoprolactinemia abolished mammary gland growth. Estrogen alone stimulated mammary epithelial cell proliferation, terminal bud formation, and the progression of TDLU1 structures to a TDLU2 morphotype. Maximal epithelial cell proliferation, DNA content, parenchymal area, and morphological development of the porcine mammary gland were realized following treatment with E+PRL or E+P+PRL. In contrast, P alone did not promote epithelial cell proliferation, TDLU type progression, mammary gland growth, or morphogenesis. These data indicate that interactions between E and PRL are the main determinants of growth and morphogenesis in the porcine mammary gland.

journal_name

Domest Anim Endocrinol

journal_title

Domestic animal endocrinology

authors

Horigan KC,Trott JF,Barndollar AS,Scudder JM,Blauwiekel RM,Hovey RC

doi

10.1016/j.domaniend.2009.04.002

subject

Has Abstract

pub_date

2009-08-01 00:00:00

pages

124-38

issue

2

eissn

0739-7240

issn

1879-0054

pii

S0739-7240(09)00036-8

journal_volume

37

pub_type

杂志文章

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