Human suppressor T cells induced by concanavalin A: suppressor T cells belong to distinctive T cell subclasses.

Human peripheral blood lymphocytes were stimulated by concanavalin A (Con A) and then evaluated by their suppressive activity for thymus-derived (T) cell- and bone marrow-derived (B) cell-proliferative responses to mitogen and allogeneic cells. Con A-activated T cells markedly suppressed these responses, but Con A-activated B cells failed to demonstrate suppressor activity. Discontinuous bovine serum albumin (BSA) density gradient separation of T cells which had been activated by Con A demonstrated that a fraction containing blast cells as well as fractions containing unproliferated cells manifest the same degree of suppressor capabilities. However, when density gradient separation of T cells followed by subsequent incubation with Con A was performed, fractions of proliferating cells of low density exhibited no suppression; a fraction containing high density T cells produced marked suppression, but this fraction incorporated only little thymidine in response to Con A. Thus, these studies indicate that Con A-induced suppressor T cells belong to a distinctive subpopulation which has already been programmed to express this function before exposure to Con A and that cell proliferation may not be a prerequisite for the development of such suppressor T cells.

• Publication year

  1977

• Venue

  Journal of Immunology

• Publication date

  1977-09-01

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.4049/jimmunol.119.3.1169PMID 302273
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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