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PMID |
Sentence |
1 |
7622182
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The outer surface lipoprotein A of Borrelia burgdorferi provides direct and indirect augmenting/co-stimulatory signals for the activation of CD4+ and CD8+ T cells.
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2 |
7622182
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Naive CD4+ and CD8+ T cells require two distinct signals to proliferate and to express effector functions [1].
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3 |
7622182
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The major co-stimulatory molecules for CD4+ T cells seem to be B7 [3], B7.2 [4,5], and heat-stable antigen (HSA) [6].
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4 |
7622182
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These molecules are expressed on a variety of naive and/or activated APC and bind to CD28 and CTLA-4 and possibly other, as yet undefined, TCRs [3,7].
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5 |
15688403
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We have comparatively evaluated the proliferative response of CTL induced in metastatic melanoma patients upon immunization against Melan-A/MART-1(27-35) tumor associated antigen (TAA) to IL-2, IL-7 or IL-15 cytokines, sharing a receptor common gamma-chain (c gamma-c cytokines).
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6 |
15688403
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All clones were able to kill tumor cell lines expressing HLA-A0201 and Melan-A/MART-1, and displayed phenotypic characteristics of effector/memory (CD45RA-/CCR7-) or CD45RA+/CCR7- effector cells in intermediate to late developmental stage (CD28-/CD276+/-) CTL.
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7 |
15688403
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Proliferative responses could be elicited or enhanced by IL-2 and IL-15, but not IL-7, in the absence or in the presence of T-cell receptor (TCR) triggering, respectively.
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8 |
15688403
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Accordingly, only IL-2 and IL-15 were able to promote the survival of the CTL clones under investigation.
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9 |
15688403
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CD8+ cells from one of the patients treated were obtained 6 months after the last vaccine boost and were cultured in the presence of Melan-A/MART-1(27-35) and each of the 3 cytokines under investigation.
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10 |
15688403
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Consistent with data from CTL clones, expansion of Melan-A/MART-1(27-35) tetramer positive cells was only observed in the presence of IL-2 or IL-15 but not IL-7.
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11 |
15688403
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Instead, when CD8+ cells from the same patient were sampled shortly (14 days) after an additional vaccination only IL-2 was able to promote the expansion of Melan-A/MART-1(27-35) tetramer positive cells.
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12 |
20544273
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Identification of immunodominant HLA-B7-restricted CD8+ cytotoxic T cell epitopes derived from mammaglobin-A expressed on human breast cancers.
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13 |
20544273
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Defining CD8(+) CTL responses to HLA class I-restricted MGBA-derived epitopes assumes significance in the context of our ongoing efforts to clinically translate vaccine strategies targeting MGBA for prevention and/or treatment of human breast cancers.
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14 |
20544273
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Further, two CD8(+) CTL cell lines generated in vitro against T2.B7 cells individually loaded with MGBA-derived candidate epitopes showed significant cytotoxic activity against MGBA B7.1, B7.3, B7.6, and B7.7.
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15 |
23716685
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HHLA2 is a member of the B7 family and inhibits human CD4 and CD8 T-cell function.
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16 |
23716685
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Here we describe HERV-H LTR-associating protein 2 (HHLA2) as a member of the B7 family that shares 10-18% amino acid identity and 23-33% similarity to other human B7 proteins and phylogenetically forms a subfamily with B7x and B7-H3 within the family.
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17 |
23716685
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HHLA2 is expressed in humans but not in mice, which is unique within the B7 and CD28 families.
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18 |
23716685
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HHLA2 does not interact with other known members of the CD28 family or the B7 family, but does bind a putative receptor that is constitutively expressed not only on resting and activated CD4 and CD8 T cells but also on antigen-presenting cells.
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19 |
23716685
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HHLA2 inhibits proliferation of both CD4 and CD8 T cells in the presence of T-cell receptor signaling.
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20 |
23716685
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In addition, HHLA2 significantly reduces cytokine production by T cells including IFN-γ, TNF-α, IL-5, IL-10, IL-13, IL-17A, and IL-22.
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21 |
23716685
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Thus, we have identified a unique B7 pathway that is able to inhibit human CD4 and CD8 T-cell proliferation and cytokine production.
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