Linked Life Data

2964490

Source:http://linkedlifedata.com/resource/pubmed/id/2964490

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1988-4-13
pubmed:abstractText
During chemical carcinogenesis Langerhans cells (LC) are depleted from the epidermis, disrupting the normal immunological functions of the skin. Tumor promotors but not initiators, have been shown to deplete adenosine triphosphatase (ATPase)-positive LC from the skin and therefore the cutaneous immune system may be impaired during tumor promotion but not initiation. The present study shows that the tumor promotor 12-O-tetradecanoylphorbol 13-acetate (TPA) but not the initiator urethane depletes Ia-positive LC from BALB/c murine ear epidermis, and beta-glucuronidase-positive LC from C57BL mouse tail skin. Sensitization with 2,4-dinitrofluorobenzene (DNFB) through urethane-treated skin resulted in a normal contact sensitivity response when the mice were challenged 5 days later. In contrast, tolerance resulted from sensitization through TPA-treated skin as a result of the generation of suppressor cells. In addition, TPA but not urethane-treated C57BL mouse tail skin survived for an extended time when grafted onto histoincompatible BALB/c mice. Therefore, impairment of the normal immunological functions of skin resulted from treatment with the tumor promotor TPA but not the tumor initiator urethane, which suggests that a loss of LC during tumor promotion may impair immunological protection against skin tumors.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0022-202X
pubmed:author
pubmed:issnType
Print
pubmed:volume
90
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
293-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Suppressor cell activation and enhanced skin allograft survival after tumor promotor but not initiator induced depletion of cutaneous Langerhans cells.
pubmed:affiliation
Department of Pathology, University of Tasmania, Hobart, Australia.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't