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  • Field evaluation  (2)
  • Acute phase proteins  (1)
  • Anti-N-artige Antikörper  (1)
  • 1
    ISSN: 1432-1238
    Keywords: Key words Hypoxia ; Ischemia ; Acute phase proteins ; Cardiac arrest ; Infections
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: Inflammation and hypoxia are frequently associated, but their interaction is poorly understood. In vitro studies have shown that hypoxia stimulates the genes of acute phase proteins (APP) and cytokines known to induce APP. We decided to determine kinetics and potential determinants of an acute phase response after cardiac arrest and to assess whether isolated moderate hypoxia can induce APP in humans in vivo. Design: Prospective, observational study in patients and human experiment. Setting: Tertiary care university hospital. Patients and participants: 22 patients after primarily successful cardiopulmonary resuscitation (CPR) and 7 healthy volunteers. Interventions: None in patients; exposure of volunteers to simulated altitude (460 torr/6 h). Results: Following CPR, type-1 APP (C-reactive protein, α1-acidglycoprotein, serum amyloid A) and type-2 APP (haptoglobin, α1-antitrypsin) increased consistently within 1–2 days and the ’negative' APP transferrin was downregulated. This APP response occurred irrespective of the cause of arrest, the estimated time of anoxia, clinical course or patient outcome and was not different in patients with and without infectious complications. Exposure of healthy volunteers to less severe but more prolonged hypoxia did not induce APP, although a time dependent increase of serum erythropoietin (EPO) was measurable under these conditions, indicating the activation of oxygen dependent gene expression. Conclusions: (i) A marked acute phase response occurs regularly after cardiac arrest, but within the complexity of this situation the severity of hypoxia is not a predominant determinant of this response. (ii) Despite in vitro evidence for similarities in the oxygen dependent regulation of APP and EPO production, the oxygen sensitivity of these proteins in vivo is different. (iii) Measurements of APP are not revealing regarding infectious complications in the early phase after CPR.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 57 (1979), S. 673-679 
    ISSN: 1432-1440
    Keywords: Formaldehyd ; Anti-N-artige Antikörper ; Immunhämolyse ; Hämodialyse ; renale Anämie ; Formaldehyde ; Anti-N-like antibodies ; Immunohaemolysis ; Haemodialysis ; Renal anaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary During reuse of formaldehyde sterilized Kiil-dialysers, red cell survival, measured by means of51Cr t/2, was significantly reduced (p〈0.001) in 16 patients with anti-N-like positive sera, when compared with 19 antibody negative control patients (Mean±SD: 16.5±2.7 versus 22.4±3.1 days.) In antibody negative patients (n=10) replacement of form-aldehyde sterilized dialysers by ethylene-oxide sterilized disposable dialysers resulted in a significant increase (p〈0.002) of51Cr t/2 (Mean±SD, days: Kiil-dialyser 16.3±1.9; disposable dialyser 20.3±3.5). This improvement took place, although antibody titres persisted during the51Cr-measurements and declined thereafter only slowly. In antibody negative patients (n=6) red cell survival did not increase, when formaldehyde as a sterilant was avoided. In antibody positive patients mean haematocrit rose significantly (p〈0.05), whereas in none of the antibody negative patients a definite change of haematocrit occurred. The data demonstrate, that formaldehyde sterilisation of dialysers may cause antibody-mediated haemolysis contributing to the extent of renal anaemia. This immunohaemolysis may be corrected, in spite of continuing antibody persistance, when formaldehyde exposure is totally avoided, or possibly when minimized.
    Notes: Zusammenfassung Während der Wiederverwendung Formaldehyd-sterilisierter Kiil-Dialysatoren war die mit51Cr bestimmte Erythrocytenüberlebenszeit bei 16 Patienten mit Anti-N-artigen Antikörpern significant (p〈0,001) kürzer als bei 19 Antikörper-negativen Kontrollpatienten (MW±SD: 16,5±2,7 bzw. 22,4±3,1 Tage). Bei Antikörper-positiven Patienten (n=10) führte das Umsetzen von Formaldehyd-sterilisierten Kiil-Dialysatoren auf Ethylenoxid-sterilisierte Einmaldialysatoren vergleichbarer Effektivität zu einem sofortigen, signifikanten (p〈0,002) Anstieg der Erythrocytenüberlebenszeit (MW±SD: 16,3±1,9 Tage, Kiil-Dialysator; 20,3±3,5 Tage Einmaldialysator). Die Antikörper-Titer blieben während der Messung der Erythrocytenüberlebenszeit unverändert, danach fielen sie im Verlauf von Monaten langsam ab. Bei Antikörper-negativen Kontrollpatienten (n=6) führte das Umsetzen von Formaldehyd-sterilisierten Kiil-Dialysatoren auf die Ethylenoxid-sterilisierten Einmaldialysatoren nicht zum Anstieg der Erythrocytenüberlebenszeit. Bei den Antikörper-positiven Patienten stieg der mittlere Hämatokritwert nach dem Umsetzen signifikant (p〈0,05) an, dagegen kam es nach dem Umsetzen bei keinem der Antikörper-negativen Patienten zu einer gerichteten Veränderung der Hämatokritwerte. Die Untersuchungen belegen, daß die Formaldehyd-Sterilisation von Dialysatoren zu einer Antikörper-vermittelten Hämolyse führen kann, die zum Ausmaß der renalen Anämie dieser Patienten beiträgt. Diese Immunhämolyse kann, auch bei Persistenz der Anti-N-artigen Antikörper, zumindest teilweise verhindert werden, wenn eine weitere Formaldehyd-Exposition des Patienten vermieden wird.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 88 (1994), S. 147-152 
    ISSN: 1432-2242
    Keywords: Solanum tuberosum ; Somatic hybrids ; Field evaluation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tetraploid somatic hybrids, derived from ten different fusion combinations, were grown in the field to study the inheritance of quantitatively-controlled agronomic traits. The data from two seasons showed that the heterosis in yield varied between 70% and 230% compared to the mid-parent value of the dihaploid fusion clones. The relative yield of the hybrids compared to two standard varieties (= 100%) ranged from 47% to 106%. Despite large differences in yield between the single hybrids of the same fusion combination, no significant differences could be detected between the hybrids. The analysis of the yield components revealed that the heterosis was mainly due to a highly increased tuber weight, whereas the tuber number was in general intermediate to that of the parent clones. In three combinations, the starch content of the hybrids was 15–20% higher than the midparent value and in the others it was intermediate. Fusion of clones with long oval tubers and with round or round-oval ones showed the round/round-oval form was dominant. Fusion combinations of tuber flesh colour indicated that in most cases yellow was dominant to white, while red skin colour was dominant over yellow.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 89 (1994), S. 873-878 
    ISSN: 1432-2242
    Keywords: Potato ; Somatic fusion ; Cytoplasm Starch ; Variability ; Field evaluation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nuclear and cytoplasmic composition of five different fusion combinations, consisting of up to 50 hybrid regenerants each, was characterized by RFLP analysis. Simultaneously, the hybrid clones of four fusion combinations were evaluated in field experiments for yield and starch content. Predominantly complete chloroplast segregation was found with a 1∶1 ratio, in all but one fusion combination. Mitochondria, in contrast revealed up to 75% recombination, as proven by the partial addition of parental banding patterns and the altered assignment of the same genotypes with different probes. Newly occuring DNA bands were also indicative of rearrangements in the mitochondrial genome. Correlations between RFLP data and field parameters were calculated. Deviating RFLP patterns of the nuclear genome did not influence yield parameters. Also the assignment of hybrids to different chloroplast genotypes did not affect yield or starch content. However, mitochondrial types could be distinguished with respect to starch content and tuber yield. The more thorough analysis of mitochondrial composition, with different probes homologous to coding regions, revealed a relationship between the homogeneity of the mt genome and the yield level.
    Type of Medium: Electronic Resource
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