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  • 1
    Electronic Resource
    Electronic Resource
    Recognition of Human Renal Cell Carcinoma and Melanoma by HLA-A2-Restricted Cytotoxic T Lymphocytes is Mediated by Shared Peptide Epitopes and Up-Regulated by Interferon-γ (1996)
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Scandinavian journal of immunology 44 (1996), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Cytotoxic T lymphocytes (CTL) have previously been isolated from peripheral blood of patients with renal cell carcinoma (RCC). The CD8-positive CTL line MZ1257-CTL-5 (CTL-5) has been shown to lyse autologous cultured RCC cells in an HLA-A2 restricted fashion. Allogeneic, HLA-A2-matched RCC and melanoma cell lines were also lysed by CTL-5, suggesting that melanoma and renal cancer share antigenic determinants. The aim of the study was to determine whether RCC and melanoma share peptide epitopes that are recognized by CTL-5 in the context of HLA-A2 molecules. Peptides were acid-eluted from various cell lines, separated by reversed phase high performance liquid chromatography (RP-HPLC), and assessed for their ability to reconstitute the CTL-5-defined epitope by pulsing the peptides on HLA-A2 positive antigen-processing mutant cell line CEM × 721.174.T2 (T2). Peptides eluted from allogeneic HLA-A2-matched RCC and melanoma cell lines exhibited the CTL-5-defined epitope in the same HPLC fractions as peptides derived from the autologous RCC line. Renal cancer and melanoma cells preincubated with interferon-γ (IFN-γ) resulted in an additional peak of reconstitution activity in both cell types. This second lytic peak was also observed when high amounts of autologous RCC cells were used for peptide preparation without IFN-γ pretreatment, indicating that IFN-γ increases the amount of MHC class I/peptide complexes per cell, rather than inducing a neo-epitope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3083.1996.d01-304.x
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  • 2
    Electronic Resource
    Electronic Resource
    Bacteria-Specific T-Cell Clones are Selective in their Reactivity Towards Different Enterobacteria or H. pylori and Increased in Inflammatory Bowel Disease (1996)
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Scandinavian journal of immunology 44 (1996), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In the present study the authors investigated the T-cell response to different enterobacteria or Helicobacter pylori and tested the hypothesis that the frequency of bacteria-specific T cells is increased in the intestine of patients with active inflammatory bowel disease (IBD), i.e. Crohn’s disease (CD) and ulcerative colitis (UC). The analysis of a large panel of T-cell clones (Tc) (n = 888) from peripheral blood, non-inflamed and inflamed intestine from IBD patients and control individuals shows that both peripheral blood and intestinal T-cell clones were selectively stimulated by either Salmonella typhimurium Yersinia enterocolitica 03, Escherichia coli or Helcobacter pylori sonicates, that only 〈 3% of all bacteria-reactive Tc were crossreactive and that proliferation to bacterial sonicates was inhibited by anti-MHC class II antibody. In addition, bacteria-specific Tc from IBD patients were more frequently isolated from inflamed intestine than from peripheral blood (P = 0.0039) or non-inflamed intestine. These data, from a large number of T-cell clones, are the first systematic analysis describing the response of individual T cells towards different bacterial species (ssp.). They show that T cells with specificity for distinct antigens or superantigens that are characteristic for a defined bacteria ssp. are present in normal, and increased in inflamed, IBD-intestine. These bacteria-specific Tc may play a role in IBD pathogenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3083.1996.d01-273.x
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  • 3
    Electronic Resource
    Electronic Resource
    HLA-B27-Restricted Cytotoxic T Lymphocyte Responses to Arthritogenic Enterobacteria or Self-Antigens are Dominated by Closely Related TCRBV Gene Segments. A Study in Patients with Reactive Arthritis (1996)
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Scandinavian journal of immunology 43 (1996), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Identification of the T-cell receptors (TCR) used by synovial cytotoxic T lymphocytes (CTL) of patients with reactive arthritis (ReA) may be crucial to better understanding the pathogenetic mechanism underlying the HLA-B27 association ofspondylarthropathies. The authors, therefore, sequenced 25 TCRB chains from HLA-B27-restricted CD8+ CTL clones and two clonal lines specific for self- or Yersinia enterocolitica antigen isolated from synovial fluids of 3HLA-B27+ patients with ReA and PBL of one healthy HLA-B27+ individual. Fourteen non-HLA-B27-restricted CTL served as controls. Both autoreactive and Y. enterocolitica specific HLA-B27-restricted CTL used a highlylimited set of VB genes with preferential rearrangement of three closely related VB families (VB 13,14,17), suggesting that these families contain a preferred site for contact with the HLA-B27 molecule. In addition, the presence of limited TCRBJ usage,limited heterogeneity in CDR3 sequences and dominant clones from individual donors among these CTL indicate that TCRB chain usage is further restricted by a limited set of peptides bound to the HLA-B27 molecule. Limited TCR usage by SF CTL of ReA patients may lay a basis for therapeutical manipulation of the T-cell response in the spondylarthropathies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3083.1996.d01-16.x
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  • 4
    Electronic Resource
    Electronic Resource
    New cell lines of gastric and pancreatic cancer: distinct morphology, growth characteristics, expression of epithelial and immunoregulatory antigens (1995)
    Springer
    Virchows Archiv 426 (1995), S. 375-384 
    Details
    ISSN: 1432-2307
    Keywords: Stomach neoplasms ; Pancreatic neoplasms ; Cell differentiation ; Histocompatibility antigens ; Interferon gamma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two new cell lines from stomach cancers and one from a pancreatic carcinoma are presented. MZ-GC-1 was established from a hepatic metastasis of a well differentiated gastric adenocarcinoma. MZ-GC-2 was derived from ascites induced by a poorly differentiated gastric adenocarcinoma. MZ-PC-1 originated from the pleural effusion of a moderately well differentiated pancreatic ductal adenocarcinoma. MZ-GC-1 cells were adherent and partially polarized, connected tightly via desmosomes. In contrast MZ-GC-2 cells consisted of slightly adherent or floating subpopulations and displayed no desmosomes. MZ-PC-1 cells were adherent and showed polarized growth, connected by apical junctional complexes. Cell doubling times were 7 days for MZ-GC-1 and 45 h for MZ-GC-2 and MZ-PC-1 cells. MZ-GC-2 and MZ-PC-1 gave rise to nude mouse tumours, resembling the original lesions. Chromosome analysis of the cell lines revealed a high range of numerical abnormalities. Each cell line had cytokeratin patterns fitting well to typical in vivo patterns. Furthermore the cell lines expressed a panel of antigens typical for gastrointestinal epithelia. Unique for MZ-PC-1 were high amounts of secreted Ca19-9. γ-Interferon enhanced HLA-class I antigens up to twofold and induced ICAM-1 expression on each cell line. HLA-class II antigens were differentially enhanced by γ-interferon. Due to their distinct characteristics the three tumour cell lines may be useful models in the investigation of the cell biology and immunogenicity of gastrointestinal tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191347
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  • 5
    Electronic Resource
    Electronic Resource
    Chirurgie bei Hepatitis (1998)
    Springer
    Der Chirurg 69 (1998), S. 522-529 
    Details
    ISSN: 1433-0385
    Keywords: Key words: Viral hepatitis ; Liver function ; Liver cirrhosis ; Immunprophylaxis ; Treatment of viral hepatitis. ; Schlüsselwörter: Virushepatitis ; Leberfunktion ; Lebercirrhose ; Immunprophylaxe ; Behandlung der Virushepatitis.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. Virushepatitiden gehören weltweit zu den wichtigsten Infektionskrankheiten. Allein über 300 Millionen chronische HBsAg-Träger und etwa die gleiche Anzahl chronischer Hepatitis-C-Virusträger werden geschätzt. Nach der Tuberkulose steht die Virushepatitis in der Statistik der infektiös bedingten Berufskrankheiten an zweiter Stelle. Insbesondere Teile Asiens, Afrikas, Lateinamerikas sowie der Mittelmeerraum und der Nahe Osten werden zu den Hochendemiegebieten der Virushepatitis gezählt. Aufgrund der immunologischen und molekularen Differenzierung sind heute die Virushepatitiden von A bis E einschließlich G weitgehend charakterisiert. Während die enteral übertragene Hepatitis A und E nur akute und in seltenen Fällen fulminante Verläufe induzieren, sind die Hepatitis B, ihre Koinfektion und Superinfektion mit Hepatitis Delta und die Hepatitis C insbesondere durch chronische Verläufe von großer medizinischer Bedeutung. Diese Erkrankungen können als Spätfolge in eine Lebercirrhose mit all ihren Komplikationen, einschließlich des primären Leberzellcarcinoms übergehen. Die für die Chirurgie besonderen Aspekte der Virushepatitis sollen diskutiert werden.
    Notes: Summary. Viral hepatitis belongs to the most important infectious diseases worldwide. More than 300 million chronic HBsAg carriers and chronic HCV carriers exist, respectively. High endemic areas of viral hepatitis are Asia, Africa, Latin America and the Near, Middle and Far East. Viral hepatitis is also very important in health care workers. Today viral hepatitis can be differentiated from type A to type E (G) based on immunological and molecular assays. While enterally transmitted hepatitis type A and type E only induce acute and rare fulminant disease, hepatitis type B, C and D often induce chronic progressive disease including liver cirrhosis with typical complications due to the portal hypertension and with a high rate of association with the development of primary liver cancer (HCC). This review focusses on viral hepatitis-related surgical problems, including liver transplantation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001040050449
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  • 6
    Electronic Resource
    Electronic Resource
    Semiquantitative assessment of pre-core stop-codon mutant and wildtype hepatitis B virus during the course of chronic hepatitis B using a new PCR-based assay (1996)
    Springer
    Archives of virology 141 (1996), S. 2091-2101 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In most patients with chronic hepatitis B positive for antibodies (anti-HBe) to HBe antigen (HBeAg), a pre-core mutant hepatitis B virus (HBV) with a point-mutation at nt. 1896 can be isolated. Clinical significance of the mutant virus in chronic hepatitis B is not proven yet, and screening of large numbers of sera during different clinical courses of numerous patients is necessary. We therefore aimed to develop a fast and reliable assay, that allows to discriminate wildtype from nt. 1896 G → A mutant HBV and to determine the ratio of mutant and wildtype HBV in patients' sera. A mutation specific polymerase chain reaction (ms PCR) with new primers served to distinguish nt. 1896 G → A mutant from wildtype HBV. This msPCR proved to be more sensitive and specific than similar assays described previously. When compared to a dilution series of a cloned HBV-DNA standard, the amount of wildtype and nt. 1896 G → A mutant HBV could be determined semiquantitatively. 102 to 107 copies of each HBV-DNA (equivalent to 105 to 1010 copies of HBV-DNA/ml patients' serum) could be amplified with steadily increasing signals. MsPCR proved to be specific as 107 copies did not give an amplification signal if they did not match the respective primer pair used. In a mixed population of mutant and wildtype virus, msPCR allows to detect even a low amount of the minor HBV strain (0.1–0.01%, of the viral population) and to determine the ratio of wildtype and mutant HBV. MsPCR is as fast and convenient to perform as an unmodified PCR. It requires careful performance to avoid contamination but no specific equipment. Clinical usefulness of msPCR was demonstrated when the ratio of wildtype to mutant HBV was determined in 86 sera collected during 3 to 7.5 years follow up of 9 patients suffering from anti-HBe positive chronic hepatitis B. We conclude that this assay conveniently allows to study patients with chronic hepatitis B in order to detect and follow-up the emergence of pre-core stop-codon mutant HBV in correlation to the clinical course.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01718217
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  • 7
    Electronic Resource
    Electronic Resource
    Autoimmune findings resembling connective tissue disease in a patient with castleman's disease (1997)
    Springer
    Clinical rheumatology 16 (1997), S. 87-92 
    Details
    ISSN: 1434-9949
    Keywords: Multicentric Castleman's Disease ; Autoimmune Features ; Collagen Disease ; Interleukin-6 ; POEMS-Syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Multicentric angiofollicular lymphnode hyperplasia (multicentric Castleman's disease) may be associated with acute phase reaction and several autoimmune features. Since lymphadenopathy is a common feature in connective tissue disease, a clear distinction between the different disease entities may be difficult. We describe a 26-year-old male patient with predominant cervical lymphadenopathy, hepatosplenomegaly and polyserositis, diagnosed as collagen disease. He showed several autoimmune features including autoimmune haemolytic anaemia, cryoglobulinaemia, positive antinuclear and anti smooth muscle antibodies, serum immune complexes and a sensorimotor polyneuropathy. Under immunosuppressive therapy with prednisolone and azathioprine, only partial remission was achieved. Repeated lymph node biopsy together with the clinical features led to the diagnosis of multicentric Castleman's disease in this patient nine years later. Interleukin-6 seems to play an important role in the pathogenesis of clinical and serum biochemical features in patients with Castleman's disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02238769
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