Linked Life Data

8579128

Source:http://linkedlifedata.com/resource/pubmed/id/8579128

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1996-3-11
pubmed:abstractText
Dendritic cells (DCs) have emerged as the dominant antigen-presenting cells (APCs) of the lung, playing a vital role in the induction of cell-mediated immunity to inhaled antigens. We have previously demonstrated that an airway challenge with the soluble antigen hen egg lysozyme yields rapid acquisition of specific antigen-presenting cell activity by purified pulmonary DCs and a cell-mediated immune response in the lung upon secondary challenge. To examine how a particulate antigen leads to a cell-mediated response in vivo, graded concentrations of heat-killed Listeria (HKL) were injected intratracheally into Lewis rats. The bacteria were rapidly ingested by lung macrophages and polymorphonuclear leukocytes. The ability of purified pulmonary DCs pulsed in vivo by an airway challenge with HKL to subsequently stimulate HKL-specific responses ex vivo showed a threshold response, requiring a dose in excess of 10(9) organisms/rat. By contrast, all dosages of HKL yielded specific sensitization of lymphocytes in the draining bilar nodes. Pulmonary DCs purified from rats after a secondary in vivo airway challenge with HKL at day 14 were ineffective antigen-presenting cells except at high dosages of antigen. The generation of cell-mediated pulmonary inflammation paralleled the antigen-presenting cell activity of pulmonary DCs and was observed only at high antigen dosages. Hen egg lysozyme immobilized onto polystyrene beads and injected intratracheally yielded comparable results to those observed with HKL. We suggest that a pulmonary cellular immune response is generated to an inhaled particulate antigen when the protective phagocytic capacities of the lung are exceeded and antigen is able to interact directly with interstitial DCs. The diversion of particulate antigens by pulmonary phagocytes may help to limit undesirable pulmonary inflammation while allowing the generation of antigen-specific immune lymphocytes in vivo.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-1592426, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-1694226, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-1740664, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-1900424, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-1910679, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-1910813, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-1919019, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-2033368, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-2162904, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-2191684, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-2492172, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-3162253, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-3497747, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-3499375, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-3511172, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-3516464, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-4071052, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-4589990, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-6211498, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-6228577, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-6731584, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-7688024, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-7699319, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8145044, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8206508, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8217188, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8250693, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8379358, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8379386, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8393477, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8425582, http://linkedlifedata.com/resource/pubmed/commentcorrection/8579128-8426110
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0002-9440
pubmed:author
pubmed:issnType
Print
pubmed:volume
148
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
657-66
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Sequestration of inhaled particulate antigens by lung phagocytes. A mechanism for the effective inhibition of pulmonary cell-mediated immunity.
pubmed:affiliation
Department of Pathology, Massachusetts General Hospital, Boston 02114, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.