Document Detail


Regulatory responses in contact sensitivity: afferent suppressor T cells inhibit the activation of efferent suppressor T cells.
MedLine Citation:
PMID:  1824829     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Two types of suppressor cells regulate the contact sensitivity (CS) response to picryl chloride (PCL). Afferent suppressor T cells (Ts-aff) inhibit the generation of CS responses to PCL, while efferent suppressor T cells (Ts-eff) inhibit the activity of Th 1 cells that mediate CS reaction. Intravenous injection of mice with TNP-substituted peritoneal exudate cells (TNP-PEC) induces Ts-eff cells that block the adoptive transfer of contact sensitivity. The induction of Ts-eff cells is prevented by the presence of Ts-aff cells, which in turn are induced by the injection of TNP-PEC coupled with antibodies of the IgG2a and IgG2b isotype (TNP-PEC-Ab). If an animal is injected with TNP-PEC prior to or simultaneously with TNP-PEC-Ab, it generates only Ts-aff cells, while if it is injected with TNP-PEC alone or TNP-PEC prior to TNP-PEC-Ab, it generates Ts-eff cells. Ts-aff cells effect only the generation of Ts-eff cells, as the addition of Ts-eff cells to assays for Ts-eff cells has no inhibitory effect on the suppressive effects of Ts-eff cells in adoptive transfer. Our experiments show that Ts-aff cells induced by TNP-PEC-Ab are phenotypically either Lyt 1+2- or Lyt 1-2+, but only the latter inhibit the generation of Ts-eff cells in vivo. The Ts-aff cells that inhibit Ts-eff activity adhere to the lectin Vicia villosa (VV), while Ts-eff cells are VV nonadherent. In addition, Ts-aff cells can prevent the generation of Ts-eff to linked haptens presented on the same PEC. It appears that a cascade of Ts cell interactions are involved in the regulation of CS responses.
Authors:
W Ptak; C A Janeway; J Marcinkiewicz; P M Flood
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Cellular immunology     Volume:  132     ISSN:  0008-8749     ISO Abbreviation:  Cell. Immunol.     Publication Date:  1991 Feb 
Date Detail:
Created Date:  1991-02-22     Completed Date:  1991-02-22     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  1246405     Medline TA:  Cell Immunol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  400-10     Citation Subset:  IM    
Affiliation:
Department of Immunology, Copernicus Medical School, Cracow, Poland.
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MeSH Terms
Descriptor/Qualifier:
Animals
Antigens, Ly / analysis
Dermatitis, Contact / immunology*
Lymphocyte Activation*
Male
Mice
Mice, Inbred CBA
Oxazolone / immunology
T-Lymphocytes, Regulatory / immunology*
Trinitrobenzenes / immunology*
Grant Support
ID/Acronym/Agency:
05-115-N//PHS HHS; CA16359/CA/NCI NIH HHS; CA29606/CA/NCI NIH HHS
Chemical
Reg. No./Substance:
0/Antigens, Ly; 0/Trinitrobenzenes; 15646-46-5/Oxazolone

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