Linked Life Data

1543651

Source:http://linkedlifedata.com/resource/pubmed/id/1543651

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-4-13
pubmed:abstractText
Polyclonal activation of human peripheral blood lymphocytes (PBLs) in vitro by preparations of Streptococcus pyogenes Su strain (OK-432) and other heat-killed strains was investigated. The streptococcal preparations tested induce a proliferative response of PBLs via interleukin-2 (IL-2)-independent pathways. The proliferative response is accompanied by the generation of lymphoblastic cells (LBCs), which consist of heterologous lymphocyte populations: CD4+ helper type of T cells, and CD4-CD8- double-negative (DN) lymphocytes, including both CD3+ TcR gamma + T cells and CD2+CD3- immature type of T or non-T cell type of lymphocytes. Almost all the LBCs express Leu19, TfR (transferrin receptor), LFA-1 and CD38 (OKT10) antigens, which are expressed on activated T cells, NK cells and some other lymphocytes. The proliferative response of human PBLs is also accompanied by the generation of potent cytotoxic activity against NK-sensitive and -resistant targets. C-dependent cytolysis and cell sorting experiments of OK-432-activated LBCs revealed that both CD3+ and CD3- types of CD4-CD8- DN lymphocytes, but not CD4+ helper T cells, may be major populations responsible for the cytotoxicity induced. On the other hand, CD4-CD8- T cells may be required for the proliferation of PBLs and generation of cytotoxic effector cells. These results suggest that the OK-432 and other streptococcal preparations stimulate the human PBLs in vitro to induce the proliferation/activation of CD4+ T cells, mediating the following generation of DN cytotoxic effector lymphocytes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0921-299X
pubmed:author
pubmed:issnType
Print
pubmed:volume
4
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
53-63
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Polyclonal activation of human lymphocytes and induction of cytotoxic lymphocytes by streptococcal preparations.
pubmed:affiliation
Department of Microbiology, Tohoku University, School of Dentistry, Sendai, Japan.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't