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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 124 (1991), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Endothelial leucocyte adhesion molecule-1 (ELAM-1) is a recently described endothelial surface glycoprotein which is inducible by interleukin 1 (IL-1). tumour necrosis factor-alpha (TNF-α) or bacterial lipopolysaccharide (LPS). Using an immunohistochemical technique and a monoclonal antibody (1.2B6) specific for ELAM-1 we have found marked vascular endothelial expression of ELAM-1 in many cutaneous inflammatory disorders, including allergic contact dermatitis, atopic dermatitis and psoriasis, and in dermal infiltrates associated with benign, premalignant and malignant keratinocyte proliferation. In normal skin, minimal levels of ELAM-1 expression were detected. In psoriasis, double immunoenzyme staining studies revealed a close spatial relationship between ELAM-1 expression and neutrophil margination, suggesting a functional link. Recombinant human interferon-7 (30 μg) injected intradermally in normal adult human volunteers did not substantially upregulate ELAM-1 in contrast to its marked effect on intercellular adhesion molecule-1 (ICAM-1) expression, indicating that this cytokine is probably not involved in ELAM-1 induction in vivo. These results indicate that ELAM-1 is widely induced in cutaneous inflammation with a time course of expression that is longer than that observed in vitro.As ELAM-1 acts as an adhesion ligand for neutrophils. and perhaps monocytes. the expression of this molecule in cutaneous lesions is likely to he an indication of the ability of vascular endothelium to recruit these cells from the circulation. Furthermore, the cytokine inducibility of ELAM-1 is indirect evidence for functional interactions between perivascular mononuclear cells, other resident cells and the blood vessel wall.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 38 (1993), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: EA-hy-926 is a cell line produced by hybridizing human umbilical vein endothelial cells (HUVEC) and the epithelial cell line A549. To establish whether EA-hy-926 could be used as a model for endothelial cells (EC) in leucocyte-EC adhesion interactions, the effect of interleukin-4 (IL-4), tumour necrosis factor (TNF) or interferon-γ (IFN) stimulation on their adhesiveness and expression of E-selectin, vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1) was compared with that of HUVEC and A549. Although HUVEC exhibited increased adhesiveness and adhesion molecule expression with IL-4, TNF or IFN, EA-hy-926 exhibited these responses only with TNF. CD11/CD 18-dependent binding accounted for a significant component of basal binding to HUVEC and EA-hy-926, but did not account for the increased binding of T cells, JY, J6, ICH-BJ or ICH-KM cell lines to TNF-stimulated monolayers. At least part of the CD1l/CD18-independent adhesion was attributable to VCAM-1 induction on HUVFC and FA-hy-926. TNF-stimulation also induced F-selectin expression on EA-hy-926 and HUVEC and an accompanying increase in neutrophil (PMN) binding. The EA-hy-926 cells used in this study, therefore, showed responses similar to HUVEC when stimulated with TNF but not when stimulated with IL-4 or IFN.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 25 (1996), S. 0 
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Differences in expression of intercellular adhesion molecule-1 (ICAM-1) and ICAM-1 mRNA levels were studied in cultured skin and oral keratinocytes before and after stimulation with different pro-inflammatory cytokines. Basal expression of ICAM-1 was undetectable on skin keratinocytes but oral keratinocytes expressed ICAM-1 at high levels. Interferon-gamma (IFN-γ) and tumor necrosis factor-alpha (TNF-α) increased ICAM-1 expression on both cell types, although TNF-α had a greater effect on oral than skin keratinocytes (P 〈 0.05) and IFN-γ was more effective than TNF-α on both cell types (P 〈 0.01). In combination, TNF-α and IFN-γ synergistically increased ICAM-1 expression on skin keratinocytes only, although ICAM-1 mRNA was synergistically increased in both cell types. IL-lα and IL-1β induced a small increase in ICAM-1 expression on oral keratinocytes but had no effect on skin keratinocytes.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1920
    Keywords: Key words Behçet's syndrome ; Magnetic resonance imaging ; Pulse sequences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We compared the sensitivity of a fluid-attenuated inversion-recovery (FLAIR) sequence with that of a conventional dual-echo spin-echo (SE) sequence) to brain lesions in 20 patients with Behçet's syndrome. They underwent 25 MRI examinations. The images were independently analysed for the number, type and anatomical location of lesions shown. There were 18 abnormal studies (13 initial and 5 follow-up). The FLAIR sequence detected significantly more lesions than the SE TE 80 (P 〈 0.05) and SE TE 20 (P 〈 0.01) sequences. It was particularly useful for demonstrating lesions in the juxtacortical white matter, which accounted for over half the lesions detected on the FLAIR images. Of patients presenting with nonspecific symptoms such as headache, seven had normal and five had abnormal studies. All patients presenting with focal neurological signs had abnormal imaging. We found supratentorial and, in particular, juxtacortical lesions to be more frequent than previously described.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 9 (1989), S. 33-37 
    ISSN: 1437-160X
    Keywords: T cells in SLE ; Lymphocytes, SLE ; Lymphocyte-endothelial interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To investigate the pathogenesis of the lymphopenia in systemic lupus erythematosus (SLE), we examined the adhesion of these T cells to endothelial cells (EC). T cells from 10 lymphopenic patients with active SLE showed significantly reduced adhesion to unstimulated and interleukin-1 (IL-1)-stimulated human EC monolayers when compared with T cells from age, sex, and race matched normal control individuals. Percentage decreases from control values (Δ) in the measured percentage of T cells adherent to unstimulated and IL-1-stimulated EC were 36.4% (P〈0.025) and 34.0% (P〈0.005), respectively. Percentage adhesion of phorbol ester-treated T cells of SLE patients was also reduced compared with similarly treated T cells of control patients; the decrease was 22.8% (P〈0.025). No abnormality was detected in the adhesion to EC of T cells from patients with asthma who were receiving corticosteroids, suggesting that the abnormality in the SLE T cells was related to the disease process itself. The reduced adhesion of the circulating T cells may be a consequence of the withdrawal from the blood of more strongly adherent cells in the course of the inflammatory response. The loss of strongly adherent lymphocytes may contribute to the lymphopenia of SLE.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Clinical rheumatology 3 (1984), S. 319-322 
    ISSN: 1434-9949
    Keywords: Synovial Fluid ; Cell Count
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have compared a rapid side-room testing strip and an automated cell counter with the conventional haemocytometer counting chamber as methods for assessing the synovial fluid cell count. The testing strip was shown to be very sensitive in detecting esterases derived from granulocytes, but to the experienced clinician it offered little clinical advantage over naked-eye judgement. The automated counter provides a fast and reliable alternative to the haemocytometer and in situations where an accurate cell count is required it could replace the haemocytometer.
    Type of Medium: Electronic Resource
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