Linked Life Data

3040776

Source:http://linkedlifedata.com/resource/pubmed/id/3040776

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1987-10-7
pubmed:abstractText
Since fibronectin is a secretory product of immature rat granulosa cells in culture and may contribute to the follicular microenvironment in vivo, we have studied the effects of this adhesion factor on follicle-stimulating hormone (FSH)-dependent differentiation in short-term (2-3-day) cultures and on growth and protein synthesis in long-term (12-day) cultures. In comparison with cells plated on tissue culture plastic, those plated on an optimal fibronectin-coated substratum showed much greater cell spreading. There were no short-term effects of this morphological change on FSH-stimulation of cyclic AMP production, apparent activities of aromatase or cholesterol side-chain cleavage enzymes, or acquisition of luteinizing hormone (LH) responsiveness in cultured cells. However, progesterone metabolism to 20 alpha-hydroxypregnan-4-en-3-one was increased. Only cultures on fibronectin showed increases between days 3 and 9 in protein (2.5-fold) and DNA (1.4-fold) contents. Cells cultured on fibronectin also showed greater uptake and incorporation of [3H]leucine in comparison with cells cultured on plastic. FSH treatment caused cell aggregation and rounding and delayed the increase in protein content of cells cultured on fibronectin. The results presented demonstrate that the principal direct effect of fibronectin-mediated adhesion on rat granulosa cells is to enhance cell maintenance and growth, while having no generalized action on FSH-dependent differentiation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0021-9541
pubmed:author
pubmed:issnType
Print
pubmed:volume
132
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
226-36
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Fibronectin stimulates growth but not follicle-stimulating hormone-dependent differentiation of rat granulosa cells in vitro.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't