Linked Life Data

9771934

Source:http://linkedlifedata.com/resource/pubmed/id/9771934

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1998-10-22
pubmed:abstractText
Prenatal exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) was investigated for its potential to predispose to breast cancer. Analysis of mammary gland differentiation and cell proliferation were used as biomarkers. Timed pregnant Sprague-Dawley CD rats were gavaged with 1 microg TCDD/kg on day 15 post-conception. Control animals were treated with the same volume of vehicle (sesame oil) on the same schedule. Mammary gland differentiation studies revealed that prenatal TCDD treatment, as compared with sesame oil treatment, resulted in significantly more terminal end buds and fewer lobules II in 50-day-old offspring, but no significant alterations to mammary gland differentiation in 21-day-old offspring. Terminal end buds are the most susceptible terminal ductal structures and lobules the least susceptible to carcinogenesis. Prenatal TCDD treatment did not alter labeling index in the mammary terminal ductal structures of 21- and 50-day-old rats, but the total proliferative compartment in terminal end buds of 50-day-old rats was larger. Prenatal TCDD treatment resulted in an increased number of chemically induced mammary adenocarcinomas in rats. TCDD delayed time of vaginal opening and caused disruption to the estrous cycle. Alteration to mammary gland differentiation (increased number of terminal end buds) is correlated with increased susceptibility to mammary cancer from prenatal exposure to TCDD.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0143-3334
pubmed:author
pubmed:issnType
Print
pubmed:volume
19
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1623-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Prenatal TCDD and predisposition to mammary cancer in the rat.
pubmed:affiliation
Department of Pharmacology and Toxicology, UAB Comprehensive Cancer Center, University of Alabama at Birmingham, 35294, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.