Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1986-3-26
pubmed:abstractText
Parechymal cells (PC) were prepared by digestion of perfused, lavaged rat lung in a mixture of collagenase and DNase, and harvested on a discontinuous percoll gradient. The process yielded on average 1.0 X 10(8) viable cells/gram tissue. PC were pulsed with soluble antigen, and tested for their capacity to trigger antigen-specific activation of immune T-cells in vitro, or to replace adherent accessory cells necessary for Concanavalin A (Con A)-induced T-cell proliferation. Unfractionated PC exhibited only minor antigen-presenting cell (APC) activity. However, removal of adherent or FcR-positive cells unmasked substantial APC activity. Subsequent experiments indicated that the majority of the APC banded at the top of the percoll gradient (density less than 1.048 g/ml). The same cell preparations substituted for adherent accessory cells in Con A- activation of T cells, suggesting capacity to secrete soluble factors such as interleukin-1 (IL-1) as well to present antigen. The PC preparation also contained T-cells, which were refractory to Con A stimulation unless endogenous adherent cells were first removed. Collectively, these data suggest the presence of non-adherent, FcR-negative, low density accessory cells in the lung parenchyma, capable of both APC activity and soluble factor production. Their T-cell-activation functions appear to be down regulated by endogenous adherent, FcR-positive cells. It is speculated that the accessory cells in these lung preparations may be dendritic cells, the activity of which is subject to inhibition by macrophages.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-110886, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-2982730, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-322558, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-4587740, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6160094, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6191873, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6221713, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6228577, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6339811, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6372559, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6457150, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6609653, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6849552, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6854208, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6968911, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-6970172, http://linkedlifedata.com/resource/pubmed/commentcorrection/3878750-7406333
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0009-9104
pubmed:author
pubmed:issnType
Print
pubmed:volume
62
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
586-93
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
T cell activation by antigen-presenting cells from lung tissue digests: suppression by endogenous macrophages.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't