Linked Life Data

2616743

Source:http://linkedlifedata.com/resource/pubmed/id/2616743

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1990-2-27
pubmed:abstractText
On Day 0, young adult female F344 rats were adrenalectomized and intrasplenically implanted with a pituitary gland and capsule containing estrone. All were thereafter given 2.5 mg deoxycorticosterone per week and the choice of saline or tap water. This treatment yields high prolactin levels and glucocorticoid deficiency (Prl+/Glc-). On Day +48, total recoverable mammary DNA was increased by more than sevenfold, tritiated thymidine uptake by nearly fourfold, and total mammary clonogens by about fivefold. Irradiation with 4, 40, and 80 cGy X rays on Day +48 increased total mammary carcinomas per rat day at risk linearly with dose, and 40 and 80 cGy significantly decreased first carcinoma latency. A dose of 40 cGy X rays on Day -1 yielded tumor latencies and frequencies insignificantly different from unirradiated controls and significantly different from the dose on Day +48. Total carcinomas per rat day at risk were better fit by a function of dose to the power 0.4 than by a linear function after exposure to 1, 10, and 20 cGy fission neutrons, and 10 and 20 cGy significantly shortened the time to appearance of the first cancer. In contrast to results with X rays, 10 cGy neutrons on Day -1 yielded tumor frequencies and latencies insignificantly different from 10 cGy neutrons on Day +48. The carcinogenic action of X rays was thus influenced by total clonogen numbers and/or proliferation rates; that of neutrons was not.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0033-7587
pubmed:author
pubmed:issnType
Print
pubmed:volume
120
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
323-38
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Clonogenic cells and rat mammary cancer: effects of hormones, X rays, and fission neutrons.
pubmed:affiliation
Department of Human Oncology, University of Wisconsin Clinical Cancer Center, Madison 53792.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.