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  • 1
    Electronic Resource
    Electronic Resource
    Early detection of IgA specific antibodies in HIV-1 infected children by peptide-ELISA and peptide time-resolved fluoro-immunoassay (1993)
    Springer
    European journal of pediatrics 152 (1993), S. 484-489 
    Details
    ISSN: 1432-1076
    Keywords: Mother-to-child transmission ; HIV-1 ; IgA antibodies ; Peptide-ELISA ; Time-resolved fluoro-immunoassay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The presence of specific IgA antibodies in sera from 25 infants born to HIV-1 seropositive mothers was investigated by peptide-ELISA and peptide time-resolved fluoro-immunoassay (TR-FIA). The infants had been monitored at different times after birth for clinical signs and/or symptoms of HIV-1 infection and for detection of HIV-1 in lymphocyte cultures. Serum samples had also been tested for HIV-1 IgG antibodies by commercial ELISA and Western blot and for p24 antigen. Eleven of 25 children were then identified as infected. IgA detection was performed after rProtein G treatment to remove interfering IgG. In the infected group, IgA specific antibodies to a synthetic peptide representing a highly conserved region of the transmembrane glycoprotein gp41 (env: 594–613) were detected in 27 (73%) out of 37 serum samples (9 of 11 children) by the peptide-ELISA test. IgA specific antibodies to the same peptide were found in 30 (81%) sera (9 of 11 children) by the peptide-TR-FIA. Specific HIV-1 IgA antibodies were detected as early as 2 months of age in serum samples from five out of seven children (71% sensitivity) using peptide-ELISA and from six out of seven (86% sensitivity) by peptide-TR-FIA. Conversely, IgA specific antibodies to HIV-1 were absent in two infected children as well as in the sera of all uninfected children tested during the follow up period. Since maternal IgA does not cross the placenta, IgA detection in the serum of the infant is indicative of HIV-1 infection. Indeed, the early demonstration of HIV-1 IgA antibodies in infected infants shows that both peptide-ELISA and peptide-TR-FIA can be used for an early diagnosis of HIV-1 infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01955055
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  • 2
    Electronic Resource
    Electronic Resource
    T Cell V-Gene Usage in Man in Some Normal and Abnormal Situations (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 636 (1991), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1991.tb33433.x
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  • 3
    Electronic Resource
    Electronic Resource
    DNA hybridization assays for detection of malarial sporozoites in mosquitoes
    Amsterdam : Elsevier
    Parasitology Today 3 (1987), S. 380 
    Details
    ISSN: 0169-4758
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0169-4758(87)90250-X
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  • 4
    Electronic Resource
    Electronic Resource
    Rapid quantitation of membrane antigens (1975)
    [s.l.] : Nature Publishing Group
    Nature 254 (1975), S. 67-69 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Use of 125I-protein A for rat, mouse and human cell typing Rat Mouse Human target Sera c.p.m. target Sera c.p.m. target* Seraf c.p.m. Lewis DA-〉Le 7,400 H-2 b k-^b 4,676 2, 5, 12, 19 1 282 (Le) Le-^DA 340 2, 5, 12, 19 7 183 2, 5, 12, 19 2 1,538 DA DA-〉Le 541 H-2k ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/254067a0
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  • 5
    Electronic Resource
    Electronic Resource
    Isolation of Lymphoid Cells with Active Surface Receptor Sites (1971)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Microbiology 25 (1971), S. 291-308 
    Details
    ISSN: 0066-4227
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.mi.25.100171.001451
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  • 6
    Electronic Resource
    Electronic Resource
    Immunohistology of skin pathergy reaction in Behçet's disease (1995)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 132 (1995), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary The immunophenotypic characteristics of the skin pathergy reaction (SPR) at 48 h in Behçet's disease (BD) were investigated in 12 patients with BD and in five controls. The findings in 11 positive and one negative SPR lesions of patients with BD were evaluated in comparison with those of normal adjacent skin and with the negative pathergy biopsies from the controls. Positive SPR biopsies showed variable epidermal thickening and cell vacuolization, as well as subcorneal pustule formation. In the SPR dermis, a variable dense focal mononuclear cell (MNC) infiltrate was seen around vessels and skin appendages, extending into the deep dermis. The MNC infiltrate was predominantly composed of T lymphocytes and monocytes/macrophages. The majority of the T lymphocytes were CD4+, and almost all expressed CD45RO. Approximately half of the infiltrating cells strongly expressed HLA-DR. Neutrophils constituted less than 5% of the infiltrating cells, but were present as clusters of elastase-positive cells at the needle-prick sites. Vessels within the lesion showed marked congestion and endothelial swelling. The endothelial cells expressed ICAM-1 strongly, and E-selectin moderately. VCAM-1 was not expressed on endothelial cells. The basal and mid-epidermal layers of keratinocytes expressed HLA-DR and ICAM-1 strongly, particularly so in areas close to the dermal MNC infiltrates. In negative pathergy biopsies, there were increased numbers of neutrophils and a few small clusters of macrophages and T lymphocytes only at the needle-prick site, and the endothelial cells of vessels close to these areas expressed E-selectin weakly. The immunohistological findings of the SPR appear to indicate an augmented antigen-independent non-specific induction phase of the inflammatory response. Absence of VCAM-1 expression by endothelial cells suggests that direct epidermal injury is the cause of the cutaneous inflammation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.1995.tb16946.x
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  • 7
    Electronic Resource
    Electronic Resource
    0KT3-Induced Cytokine mRNA Expression in Human Peripheral Blood Mononuclear Cells Measured by Polymerase Chain Reaction (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 36 (1992), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The kinetic profile of cytokine gene expression in normal human peripheral mononuclear cells (MNC) activated by an anti-CD3 monoclonal antibody was studied. The presence or absence of 10 different cytokine mRNA were measured in a polymerase chain reaction (PCR) assisted mRNA amplification assay. Afler 2 h of stimulation the mRNA for interleukin-lα (IL-lα). interleukin-2 (IL-2). interleukin-3 (IL-3). tumour necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) were detectable and remained present during the whole time period studied (22 h). lnterleukin-6 (IL-6) and granulocyte macrophage colony stimulating factor (GM-CSF) were detected after 4 h. while interleukin-1O (IL-1O) mRNA did not appear until after 7 h: they all remained expressed at 22 h. A transient expression of interleukin-4 (IL-4) mRNA was observed between 4 and 7 h of stimulation. No gene expression of granulocyte colony stimulating factor (G-CSF) was detected at any time. These results show that anti-CD3 stimulation of MNC leads to a rapid sequential induction of different cytokine mRNA. some with a very transient expression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1992.tb03135.x
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  • 8
    Electronic Resource
    Electronic Resource
    Abnormal T-Cell Expansion and V-Gene Usage in Myasthenia Gravis Patients (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 34 (1991), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To determine the extent of V-gene heterogeneity of blood T lymphocytes in patients suffering from Myasthenia Gravis (MG), we used eight recently available monoclonal antibodies (MoAb), directed against different Vα and Vβ gene products of the variable part of the T-cell receptor (TCR), covering approximately 25% of the α/β T cells in normal peripheral blood (PBL) of healthy individuals. Using a two-colour immunofluorescence method, we could calculate the expression of α/β V segments within the two major T-cell subsets, CD4-/CD8+ and CD4+/CD8- lymphocytes. Twenty-seven per cent (4/15) of the MG patients had T cells showing signs of abnormal expansion. Furthermore, among these expanded T cells, a restricted Vβ12 gene expansion could be seen, in three out of four patients. No correlation between TCR V-gene usage and HLA haplotypes (HLA-A, -B, -DR and -DQ) could be seen. Our data suggest that the majority of MG patients have abnormally expanded T-cell clones. The relevance of these findings is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1991.tb01533.x
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  • 9
    Electronic Resource
    Electronic Resource
    A Monoclonal Antibody, H2, Defines a New Surface Antigen Expressed on Human Lymphocytes (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 30 (1989), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have previously described a monoclonal antibody (MoAb), H2, which recognized a tumour-unique antigen on a human T-cell chronic lymphatic leukaemia (T-CLL, CD3,4+). However further characterization of H2 has revealed a reactivity with the majority of T lymphocytes and a minority of B lymphocytes, some malignant T cells and a few cell lines of leukaemia or of hematopoietic tumour origin. The molecular weight of the antigen (80,000) precipitated by the MoAb H2 from the cell lines NALM-6 and Reh corresponded to that previously found. When PBL were stimulated with PHA, IL-2, or Con A a reduced reactivity of H2 could be seen. The MoAb H2 was submitted to the Fourth International Conference on Human Leucocyte Differentiation Antigens, Vienna, 1989. H2 did not cluster in any of the 78 flusters of differentiation (CD 1–78) discussed at the conference, indicating its unique reactivity. This suggests that we have defined a new antigen on lymphocytes with a possible role along the resting proliferating axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1989.tb02464.x
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  • 10
    Electronic Resource
    Electronic Resource
    Nearly Identical T-Cell Receptor V-Gene Usage at Birth in Two Cohorts of Distinctly Different Ethnic Origin: Influence of Environment in the Final Maturation in the Adult (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 36 (1992), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have previously analysed the T-cell receptor (TCR) V-gene usage in peripheral blood T lymphocytes from a group of healthy Scandinavians, and described a biased representation (i.e. a statistically significant higher median representation) for some of the TCR V genes towards the CD4+ subpopulation. In a subsequent study the usage of the same V genes was analysed in single positive (CD4+CD8− and CD4−CD8+) human thymocytes, and a similar type of skewness was noted. These observations might be explained by an influence of the specificity of the TCR of thymocytes on the maturation into the CD4+ or the CD8+ lineage. Such a model would assume an interaction between a common determinant on the major histocompatibility complex (MHC) class I or class II molecules, or with a peptide that is preferentially presented by either of the two molecules, and the TCR on the maturing thymocyte. To investigate the possible influence of a different genetic background and environment on skewed TCR V-gene representation, we have in this study analysed the TCR V-gene usage in peripheral blood and umbilical cord blood lymphocytes obtained from Asians, with a different ethnic and environmental background from our previous Scandinavian subjects. In the umbilical cord blood lymphocytes the TCR V-gene usage was close to identical between the two different ethnic groups in both CD4+ and CD8+ subpopulations. Analysing the peripheral blood lymphocyte (PBL) TCR V-gene usage, we found that three of the four monoclonal antibodies (MoAb) with a biased reactivity towards the CD4+ subpopulation in the Scandinavian group also showed a similar skewed reactivity in this study. Thus, the majority of the TCR V genes were used in a similar way. Some minor but definite disrepancies could be detected when comparing ICR V-gene usage in adult individuals from these two different ethnic groups. These differences could be inferred to be due to selective peripheral expansion through environmental pressure of T cells utilizing a specific Vβ gene segment.We conclude that a striking preservation of biased TCR V-gene usage does exist in humans of distinctly different ethnic origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1992.tb02942.x
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