Linked Life Data

6239656

Source:http://linkedlifedata.com/resource/pubmed/id/6239656

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1985-2-11
pubmed:abstractText
In the present study the tissue distribution of [3H]methotrexate was studied after intravenous injection of [3H]methotrexate-containing liposomes in normal and macrophage-depleted mice. Elimination of macrophages was performed by treatment with dichloromethylene diphosphonate- (DMDP)-containing liposomes. After thorough elimination of the macrophages from spleen and liver, by two intravenous injections of DMDP liposomes 6 and 4 days before tissue distribution studies, we found dramatic changes in the localization pattern of [3H]methotrexate liposomes in the blood, due to a decreased uptake of [3H]methotrexate liposomes by the DMDP liposome-treated liver. Because of the absence of these macrophages that are able to clear the blood of liposomes, and because of the resulting higher blood level of liposomes, we found an enhanced uptake of [3H]methotrexate liposomes by the spleen. It may be concluded that, in the spleen, apart from uptake of liposomes by macrophages, at least one other mechanism is responsible for the clearance of liposomes from the circulation. When comparing cholesterol-rich with cholesterol-poor liposomes, we found basically the same results, although uptake of cholesterol-rich liposomes by macrophages was smaller than that of cholesterol-poor liposomes, as found in several other studies. We suggest that pretreatment with DMDP liposomes can help to maintain a high level of intravenous-injected liposome-entrapped material in the blood, which otherwise would be removed by macrophages.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
802
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
428-34
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
The effect of elimination of macrophages on the tissue distribution of liposomes containing [3H]methotrexate.
pubmed:publicationType
Journal Article