T-cell receptor

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Effects of HIV-1 peptides on T-cell receptor variable beta chain families

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Abstract

Superantigens (SAGs) selectively stimulate expansion and then deletion of specific T cell antigen receptor (TCR) variable beta chain (Vbeta) families. We investigated six synthetically produced HIV-1-related peptides for evidence of SAG activity: three derived all or in part from the transmembrane gp41 protein and three from the genetic sequence of the tRNA binding region.… Read more

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Mitogen-induced modulation of CD3, CD4, and CD8

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Abstract

It is not clear whether CD3 contacts CD4 or CD8 directly, nor have the regulation and interregulation of expression of these three receptor molecules been determined. We explored these issues by first stimulating human peripheral blood lymphocytes in vitro with three well-characterized T-cell receptor-directed mitogens (phytohemagglutinin [PHA], concanavalin A [ConA], and anti-CD3 monoclonal antibody [anti-CD3]) and then using multiparameter flow cytometric techniques to investigate modulation of surface (sur) and cytoplasmic (c) CD3, CD4, and CD8.… Read more

Illustration(s) pertain to the topic addressed in this publication, not the specific research or data presented in the publication

Kawasaki disease and the T-cell antigen receptor

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Abstract

We investigated the evidence for an infectious etiology of Kawasaki disease (KD), an acute vasculitis of unknown etiology, by assessing the effects of KD on the T cell antigen receptor variable beta region families (V beta). Using 3-color flow cytometry, we studied KD patients pre- and post-intravenous gamma globulin (IVIG) therapy and at > 40 days post therapy, additionally comparing them to matched pediatric control patients (PCC) and their own healthy parents (one parent/KD child).… Read more

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Immunoregulatory changes in Kawasaki disease

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Abstract

Kawasaki disease (KD) is an acute vasculitis of unknown etiology, occurring in young children and treated with intravenous gamma globulin (IVIG) to prevent significant cardiac morbidity and mortality. We studied KD patients pre- and post-IVIG therapy and at >40 days posttherapy, additionally comparing them with matched pediatric control patients and parents.… Read more

Illustration(s) pertain to the topic addressed in this publication, not the specific research or data presented in the publication

HIV antigens and T-cell receptor variable beta chain families

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Abstract

The authors investigated whether the human immunodeficiency virus (HIV) has restrictive effects on the variable region of the beta chain (V beta) of the T-cell antigen receptor (TCR), by in vitro cultivation of non-HIV-infected peripheral blood lymphocytes with one of six HIV antigens or heat-inactivated whole virus (HIV-HI).… Read more

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Detection of a novel binding site for T cell derived antigen binding proteins on thymic epithelial cell surfaces

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Abstract

The presence of helper T cells that do not recognize major histocompatibility complex encoded antigenic determinants but rather are specific for self idiotypic determinants led us to search for a mechanism by which such cells might be influenced by idiotype expressed on the surfaces of thymic epithelial cells.… Read more

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How T lymphocytes recognize antigen

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Abstract

One of the most intriguing problems in immunology during the years since the discovery of T cells as an entity has been the nature and specificity of their receptors. The study of the antigen-binding receptors in T cells has been plagued by a number of technical difficulties that are just now being solved.… Read more

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T lymphocytes responding to Mls-locus antigens are Lyt-1+, 2- and I-A restricted

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Abstract

We have investigated primary and secondary responses of mouse splenic T cells to strong mixed lymphocyte stimulating antigens controlled by the Mls locus using MHC-identical mixtures of cells. Our studies show that strong primary Mls-locus specific responses involve recognition of self I-A antigens, since BUdR and light suicide or F1 into parent radiation bone-marrow chimeras both demonstrate a preference of unprimed F1 T cells to respond to Mls-locus antigens associated with one parent’s MHC antigens.… Read more