Linked Life Data

2459910

Source:http://linkedlifedata.com/resource/pubmed/id/2459910

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1988-11-14
pubmed:abstractText
The diterpene forskolin which increases 3',5'-cyclic adenosine monophosphate concentrations (cAMP) in intact cells by directly activating the enzyme adenyl cyclase, was examined for its ability to alter bone resorption in fetal rat long bone cultures. After 48 h, forskolin inhibited resorption at 1.0 and 10 microM. However, after 120 h, it had a small stimulatory effect at 1.0 microM and no net effect on resorption at 10 microM. Isobutyl-methylxanthine (IBMX), which elevates cAMP levels in cells by inhibiting the enzyme 3',5'-cyclic adenosine monophosphate phosphodiesterase, produced a resorptive response which was slightly different from that of forskolin. After both 48 and 120 h, IBMX at 0.1 mM stimulated resorption while at 1.0 mM, it had only inhibitory effects. In bones which were stimulated to resorb with either parathyroid hormone or 1,25(OH)2 vitamin D, forskolin inhibited resorption. The inhibitory effects of forskolin on hormonally stimulated resorption were transient in cultures treated with 1.0 microM but were sustained with 10 microM. Inhibitory responses to forskolin did not appear to result from toxicity since they were completely reversed when forskolin was removed from the media. These results imply that agents which increases 3',5'-cyclic adenosine monophosphate concentrations in bone activate two resorptive pathways: one which is inhibitory and another which is stimulatory.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0884-0431
pubmed:author
pubmed:issnType
Print
pubmed:volume
1
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
313-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Forskolin has both stimulatory and inhibitory effects on bone resorption in fetal rat long bone cultures.
pubmed:affiliation
Division of Endocrinology and Metabolism, Newington Veterans Administration Medical Center, CT 06111.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.