Linked Life Data

9598869

Source:http://linkedlifedata.com/resource/pubmed/id/9598869

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1998-8-13
pubmed:abstractText
The purpose of this work was to examine the mammary glands of adult, ovariectomized female cynomolgus macaques (Macaca fascicularis) in a long-term study of the effects of hormone treatments on chronic disease. Treatments included conjugated equine estrogens (CEE), medroxyprogesterone acetate (MPA), CEE+MPA, and tamoxifen. Doses were scaled from those given women. Treatments were given in the diet for three years, followed by necropsy and tissue collection. Endpoints evaluated included glandular histology, histomorphometry, and immunohistochemical detection of the proliferation marker Ki-67, estrogen receptor (ER), and progesterone receptor (PR) in mammary epithelial cells. Major findings were as follows: CEE induced PR expression and focal to diffuse lobuloalveolar proliferation. Proliferation was increased by the addition of MPA, but was not induced by MPA alone. Tamoxifen induced ER and PR but not Ki-67 expression or glandular hyperplasia. Neoplasms were not seen. These findings indicate that progestogens may exacerbate, not antagonize mammary gland proliferation induced by estrogen replacement therapy, and that tamoxifen has both estrogen agonist and antagonist effects on sex steroid receptor expression in the normal primate breast.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0167-6806
pubmed:author
pubmed:issnType
Print
pubmed:volume
48
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
221-9
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Effects of conjugated estrogens, medroxyprogesterone acetate, and tamoxifen on the mammary glands of macaques.
pubmed:affiliation
Department of Comparative Medicine, Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, North Carolina 27157-1040, USA. jmcline@cpm.bgsm.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't