Linked Life Data

8110990

Source:http://linkedlifedata.com/resource/pubmed/id/8110990

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1994-3-25
pubmed:abstractText
To study the importance of estradiol concentrations in which tumors are growing to progression of tumor growth and cell kinetics, we have used a human tumor-nude mice model. In this model a human endometrial adenocarcinoma with estradiol independent but estradiol-responsive growth phenotype (i.e. the tumor was capable of growing in absence of estradiol but its growth could be stimulated by estradiol at the start of preparation phase) was examined. In the preparation phase pieces from this tumor were transplanted into nude mice, randomly divided into two groups, one with and one without estradiol treatment. After 18 months growth in these different hormone conditions the tumors were measured for p53 protein expression and pieces from both these groups were again transplanted into oophorectomized nude mice, each group being randomly allocated to two subgroups, one with and one without estradiol treatment (experimental phase). Tumor growth was measured during the experimental phase, whereas cell kinetic parameters and steroid receptor concentrations were analyzed after the experimental phase. Our findings indicate that progression of the growth phenotype is independent of estradiol conditions in which human endometrial adenocarcinomas are grown. Long-term growth in estradiol-poor conditions results in estradiol resistance of the cell cycle, probably accompanied by overexpression of the p53 protein. Tumor growth in estradiol-rich conditions, however, may protect, at least to some extent, the same tumor, which retains higher sensitivity of cell proliferation to estradiol and normal production of the p53 protein despite progressive changes in growth regulation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0258-851X
pubmed:author
pubmed:issnType
Print
pubmed:volume
7
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
451-6
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:articleTitle
Effect of estradiol on tumor growth, cell kinetics and p53 oncoprotein expression in human endometrial adenocarcinoma heterotransplanted into nude mice.
pubmed:affiliation
Department of Oncology, University Hospital, Lund, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't