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  • 1995-1999  (3)
  • 1990-1994
  • 1900-1904
  • 1996  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 52 (1996), S. 449-454 
    ISSN: 1420-9071
    Keywords: Protein kinase (cAMP-dependent) ; protein phosphatases ; phosphofructokinase ; Ascaris lumbricoides ; evolution of proteins ; substrate specificity ; regulation of glycolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The glycolytic control enzyme phosphofructokinase from the parasitic nematodeAscaris lumbricodies is regulated by reversible phosphorylation. The enzyme is phosphorylated by an atypical cyclic adenosine monophosphate (cAMP)-dependent protein kinase whose substrate specificity deviates from that of the mammalian protein kinase. This variation is explained by structural peculiarities on the surface part of the catalytic groove of the protein kinase. Also, the protein phosphatases responsible for the reversal of phosphorylation appear to act specifically in glycolysis and are different from those participating in regulation of glycogenolysis.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Mathematische Zeitschrift 223 (1996), S. 27-45 
    ISSN: 0025-5874
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1435-2451
    Keywords: Trauma ; Wundheilung ; Granulozytenfunktion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wurde die Trauma-bedingte Auswirkung auf Migrationsparameter neutrophiler Granulozyten (PMN) und auf die PMN-Elastase-Freisetzung untersucht, mit dem Ziel, eine akute Entzündungsreaktion von Anbeginn an bis zur Erholungsphase im Verlauf zu kontrollieren. 15 Patienten, die sich einem unfallchirurgischen Eingriff, gefolgt von blander Wundheilung, unterzogen, dienten als Entzündungsmodell. Die Erfassung des PMN-Aktivierungsgrads erfolgte im Vollblut durch Messung ihrer Migrationsbereitschaft (TMI) und ihres Eindringvermögens (DC) in ein Membranfiltersystem, welches ein Chemotaxindepot (FMLP) beinhaltete. Kontrollkammern waren FMLP-frei und charakterisierten die Spontanmigration. Bei der gesunden Kontrollgruppe (n=64) nahm die Zahl der ins Filtersystem eingedrungenen PMN kontinuierlich von der oberflächlichsten bis zur tiefsten Schicht ab. FMLP beeinflußte die Mobilisierungsrßte der vom Blut ins Filtersystem eingewanderten PMN nicht, aber jene Zellen, die wanderten, drangen tiefer vor (p 〈 0.05). Nach dem Tauma war die spontane und FMLP-stimulierte DC erhöht (p〈0.05). Es war eine Tendenz, die PMN-Migrationsaktivität episodisch zu hemmen, bemerkbar. Eine Depression der unspezifischen Immunfunktion (niedrige TMI-Werte) fanden sich am 3. (p 〈 0.0001) und 12. postoperativen Tag (p 〈 0.01). Es bestand keine Korrelation zwischen den Migrationsparametern und dem Entzündungsmarker PMN-Elastase. Vorläufige Ergebnisse deuten darauf hin, daß die Analyse von PMN-Migrationsparametern im Vollblut-membranfilterassay ein wertvolles Attribut in der Verlaufskontrolle Trauma-assoziierter immunologischer Veränderungen repräsentieren könnte.
    Notes: Abstract We examined the effects of trauma on polymorphonuclear leucocyte (PMN) migratory parameters and PMN elastase release, with the aim of tracing an acute inflammatory reaction from its very beginning to the phase of recovery. Fifteen patients who underwent monotrauma surgery, followed by uneventful healing, served as inflammation model. PMN activation was studied by measuring their readiness to migrate (TMI) and their penetration potency (DC) in a whole blood membrane filter device, in which a chemoattractant depot (FMLP) was integrated. Control chambers lacking FMLP provided parameters of the spontaneous migration. In healthy controls (n = 64), the numbers of invading PMNs decreased continuously from the outermost layer towards the interior of the filter device. FMLP did not influence the mobilization rate of PMNs immigrant from the blood into the filter, but those cells that did migrate penetrated deeper (P 〈 0.05). After trauma, the spontaneous and FMLP-stimulated DC was increased (P〈0.05). Trauma also tended to inhibit PMN migratory activity episodically; depression of the unspecific immune function (low TMI values) was found on the 3rd (P〈0.0001) and 12th (P〈0.01) postsurgical days. There was no correlation between the migratory parameters and the inflammation parameter, PMN elastase release. Preliminary results indicate that analyses of PMN migratory parameters by a whole blood membrane filter assay could provide a valuable adjunct in monitoring trauma-associated immunologic changes.
    Type of Medium: Electronic Resource
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