Linked Life Data

299854

Source:http://linkedlifedata.com/resource/pubmed/id/299854

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1977-3-15
pubmed:abstractText
Leukocytes separated initially by Ficoll-Triosil sedimentation from the peripheral blood of 62 healthy donors and 64 patients with a variety of cancers were tested for cytotoxicity against cells from a single human foetal lung, by means of a microplate technique based on visual enumeration of surviving target cells. Under these conditions cytotoxicity was primarily observed to be a function of the granulocyte content of the preparations, which was extremely variable (range 0-60%). When the influence of these cells was greatly diminished through depletion by adherence, residual cytotoxicity was still detectable in the majority of samples tested. Complete abrogation of this cytotoxicity by pretreatment with carrageenan implicated cells of the monocyte-macrophage series, which persisted as a small minority (about 2%) in the already depleted effector cell populations. However some cytotoxicity could also be demonstrated in populations, purified by passage through columns containing nylon fibre or Degalan-coated (human Ig-anti Ig) beads, which consisted almost exclusively (about 98%) of lymphocytes, mainly of thymus (T)-dependent type (greater than or equal to 80%). Under these conditions and those in which T-cells were concentrated by formation of spontaneous E rosettes, cytotoxicity appeared to decline with T cell enrichment, suggesting that the cytolytic effects were attributable to cells of the non T-compartment which were present to a variable extent in the different T-cell-enriched populations. Although the absolute identity of these cells was not established, the experiments illustrate potential sources of non-specific cytotoxicity among different effector cell populations against target cells expressing antigens to which the majority of leukocyte donors--in health or disease--were presumably non-sensitized. As such these data have several implications for the interpretation of in vitro cytotoxicity tests against human neoplasms.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0020-7136
pubmed:author
pubmed:issnType
Print
pubmed:volume
19
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
34-42
pubmed:dateRevised
2007-7-24
pubmed:meshHeading
pubmed:year
1977
pubmed:articleTitle
Reactivity of peripheral blood leukocytes against human foetal cells. II. Cytotoxic potential of preparations enriched or depleted of different leukocyte populations.
pubmed:publicationType
Journal Article