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PMID |
Sentence |
1 |
1386485
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The blocking activity of recombinant soluble CD4 (sCD4) and phosphonoformate (foscarnet) varied with the number of gp120 molecules and number of active RNA polymerase molecules per virion, respectively.
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2 |
1674549
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Quantitative infectivity assays were used to study how the blocking activity of soluble CD4 (sCD4) is affected by sCD4 concentration, target cell density, and viral stock age.
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3 |
2190604
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Sensitive enzyme-linked immunosorbent assay-based methods are described for monitoring the binding of envelope glycoproteins from HIV-1 and HIV-2 to soluble CD4 (sCD4).
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4 |
2190605
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Consistent with this finding, MGS gp120 binds to soluble CD4 (sCD4) with an affinity 50-100-fold lower than that of Celltech gp120.
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5 |
7685660
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CD2 binds specifically to the surface glycoprotein LFA-3.
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6 |
7685660
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CD2/LFA-3 adhesion is the basis for the formation of rosettes between T cells and sheep erythrocytes (SRBC) which bear the sheep homologue of LFA-3.
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7 |
7685660
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More importantly, CD2/LFA-3 adhesion functions in the immune system to augment T cell activation; it initiates conjugate formation between participating T cells and antigen-presenting cells (APC).
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8 |
7685660
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We investigated the effects of soluble forms of CD2 (sCD2), produced in either baculovirus or CHO expression systems, on the rosetting of T cells with SRBC and on the activation of T cells by antigen plus major histocompatibility complex (MHC) molecules.
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9 |
7685660
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These findings are consistent with the notion that the CD2/LFA-3 interaction augments antigen-specific T cell functions.
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10 |
7685660
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The use of a CD2 "decoy" molecule rather than anti-CD2 or anti-LFA-3 antibodies to block the CD2/LFA-3 interaction rules out secondary antibody effects, via the Fc portion, as the basis for inhibition of T cell activation and directly stresses the importance of this adhesion interaction in T cell responses.
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11 |
9363590
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Serial plasma collected from the volunteers from day 0 (before infection) to day 17 after infection were examined for levels of soluble interleukin-2 receptor (sIL-2R), soluble CD4 (sCD4), soluble CD8 (sCD8), interleukin-2 (IL-2) and interferon gamma (INF gamma).
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12 |
9363590
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Elevation of the levels of sIL-2R, IFN gamma, sCD4 and IL-2 became obvious during the period of viremia and was followed by a later increase in the level of sCD8.
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13 |
9363590
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T cells are activated in vivo by dengue virus infection ii. activation of CD4+ T cells occurs during the period of viremia iii. activation of CD8+ T cells follows CD4+ T cell activation.
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14 |
9363590
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Serial plasma collected from the volunteers from day 0 (before infection) to day 17 after infection were examined for levels of soluble interleukin-2 receptor (sIL-2R), soluble CD4 (sCD4), soluble CD8 (sCD8), interleukin-2 (IL-2) and interferon gamma (INF gamma).
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15 |
9363590
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Elevation of the levels of sIL-2R, IFN gamma, sCD4 and IL-2 became obvious during the period of viremia and was followed by a later increase in the level of sCD8.
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16 |
9363590
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T cells are activated in vivo by dengue virus infection ii. activation of CD4+ T cells occurs during the period of viremia iii. activation of CD8+ T cells follows CD4+ T cell activation.
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17 |
9882391
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We have characterized sera from healthy volunteers immunized with a monomeric recombinant gp120 (rgp120) derived from a CCR5/CXCR4 (R5X4)-using subtype B isolate of human immunodeficiency virus type (HIV-1), HIV-1W61D, in comparison to sera from long-term HIV-1-infected individuals, using homologous reagents.
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18 |
9882391
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Sera from vaccinees and HIV-1 positive subjects had similar binding titers to native monomeric rgp120W61D and showed a similar titer of antibodies inhibiting the binding of soluble CD4 (sCD4) to rgp120W61D.
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19 |
11602749
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Human immunodeficiency virus (HIV) fusion and entry involves sequential interactions between the viral envelope protein, gp120, cell surface CD4, and a G-protein-coupled coreceptor.
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20 |
11602749
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In this study, we examined the disposition of these features during the fusion of HeLa cells expressing either HIV(HXB2) envelope (Env cells) or CXCR4 and CD4 (target cells).
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21 |
11602749
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Analyses of cells arrested by cooling to 4( degrees )C revealed that antibodies against the CD4-induced coreceptor-binding domain, i.e., 17b, 48d, and CG10, faintly react with Env cells even in the absence of target cell or soluble CD4 (sCD4) interactions.
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22 |
11805109
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Soluble CD4 (sCD4), the first drug in this class, failed to suppress viral replication in vivo.
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23 |
12768015
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In sharp contrast, 4KG5 binding to gp120 is inhibited by soluble CD4 (sCD4) and by all other (n = 14) anti-CD4bs MAbs tested. 4KG5 is unable to recognize gp120 in which either V1, V2, or V3 has been deleted, and MAbs against the V2 or V3 loops inhibit the binding of 4KG5 to gp120.
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24 |
14554091
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It has been previously established that soluble CD4 (sCD4) interaction leads to shedding of gp120 from viral particles, and that gp120 may also be easily lost from virions during incubation or particle purification procedures.
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25 |
15308718
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For enhanced selection of broadly cross-reactive antibodies, soluble HIV-1 envelope glycoproteins (Envs proteins) from two isolates complexed with two-domain soluble CD4 (sCD4) were alternated during panning of a phage-displayed human antibody library; these two Env proteins (89.6 and IIIB gp140s), and one additional Env (JR-FL gp120) alone and complexed with sCD4 were used for screening.
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26 |
15320988
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Thus, in addition to interactions with the gp41 HR-1 region, the fusion inhibitor peptide DP178 binds to triggered soluble HIV-1 recombinant gp120 following its interaction with sCD4 or CD4 mimic mAb A32.
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27 |
15464849
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In this study, DNA vaccines were constructed to express a fusion protein of the soluble human CD4 (sCD4) and the gp120 subunit of the HIV-1 envelope.
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28 |
15867093
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Here, we show that the chemokine coreceptor binding site of HIV-1 from clade A, B, C, D, F, G, and H and circulating recombinant form (CRF)01, CRF02, and CRF11, elicits high titers of CD4-induced (CD4i) antibody during natural human infection and that these antibodies bind and neutralize viruses as divergent as HIV-2 in the presence of soluble CD4 (sCD4). 178 out of 189 (94%) HIV-1-infected patients had CD4i antibodies that neutralized sCD4-pretreated HIV-2 in titers (50% inhibitory concentration) as high as 1:143,000.
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29 |
18804254
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In the presence of soluble CD4 (sCD4), the breadth of V3-mediated neutralization was increased; up to 80% and 77% of the subtype B and C viruses respectively were sensitive to V3-mediated neutralization.
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30 |
20709110
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We have previously identified and characterized a human engineered antibody domain (eAd), m36, which exhibits potent broadly neutralizing activity against HIV-1 by targeting a highly conserved CD4 binding-induced (CD4i) structure on the viral envelope glycoprotein (Env) gp120. m36 has very small size (∼15kDa) but is highly specific and is likely to be safe in long-term use thus representing a novel class of potentially promising HIV-1 inhibitors.
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31 |
20709110
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We next fused m36 and its mutants with the first two domains (soluble CD4, sCD4) of the human CD4 using a polypeptide linker.
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32 |
21715496
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Soluble forms of the HIV-1 receptor CD4 (sCD4) have been extensively characterized for more than 2 decades as promising inhibitors and components of vaccine immunogens.
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33 |
23183895
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The result showed that, in contrast to little neutralization by the F425A1g8 IgG1 in the absence of sCD4, the IgA1 variant of the Ab displayed significant independent neutralization activity against a range of HIV clade B isolates in the absence of sCD4.
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