Linked Life Data

6432902

Source:http://linkedlifedata.com/resource/pubmed/id/6432902

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1984-10-15
pubmed:abstractText
Phorbol esters with tumor promoter activity enhance the spontaneous cytotoxicity of human lymphocytes against a variety of target cell lines, with an efficiency that correlates with their potency as tumor promoters or skin irritants. Analysis of surface marker expression of the lymphocytes cytotoxic after treatment with phorbol ester identified the cytotoxic cell subset as that containing natural killer cells. Although gamma-interferon (IFN gamma) is produced by T cells treated with phorbol esters, IFN gamma is probably not the mediator of enhancement of natural killer cell activity, because anti-IFN gamma antibodies failed to block this enhancement. Spontaneous cell-mediated cytotoxicity is inhibited when phorbol esters are present during the cytotoxic assay, but is enhanced when the effector cells are pretreated with these agents. On the other hand, antibody-dependent cytotoxicity mediated by lymphocytes is inhibited by phorbol ester pretreatment of the effector cells or by phorbol esters present during the cytotoxic assay. Treatment of lymphocytes with phorbol esters at 37 degrees C, but not at 4 degrees C, completely abrogates in 1 to 2 hr the expression of the receptor for the Fc fragment of IgG, as detected by rosette formation with IgG-sensitized erythrocytes and by reactivity with anti-Fc receptor antibodies. The inhibition of antibody-dependent cytotoxicity by phorbol esters is probably secondary to their effect on the Fc receptor.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:volume
133
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1869-77
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Phorbol esters enhance spontaneous cytotoxicity of human lymphocytes, abrogate Fc receptor expression, and inhibit antibody-dependent lymphocyte-mediated cytotoxicity.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.