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  • 1
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Guillain-Barré-Syndrom ; N.-suralis-Biospie ; EMG ; Key words Guillain-Barré syndrome ; N. suralis biopsy ; EMG
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary We report three patients with severe Guillain-Barré syndrome (GBS). On clinical examination, no sensory deficit was elicited. Electromyography (EMG) and motor nerve conduction velocity (NCV) studies were indicative of an axonal lesion. In two patients, we found total peripheral conduction block without volitional EMG activity. Sensory NCV and cortical median nerve evoked potentials remained normal. Sural nerve biopsy revealed unequivocal alterations of sensory nerve fibers, some in the form of primary demyelination. Therefore, these cases must bei classified as combined motor-sensory syndromes despite the clinical and electrophysiological findings. Although total denervation of the extremity muscles occurred, causing tetraparalysis, this manifestation appears to be attributable to the secondary axonal variant. In contrast to positive reports in literature, immunomodulatory treatment proved ineffective in all three cases.
    Notes: Zusammenfassung Wir beobachteten 3 Patientinnen mit schwer verlaufendem Guillain-Barré-Syndrom (GBS). Bei klinischer Untersuchung waren keine sensiblen Störungen zu eruieren. EMG und motorische Elektroneurographie sprachen für eine axonale Läsion. Bei 2 Patientinnen bestand ein kompletter Leitungsblock motorischer Fasern, dabei war im EMG keine Willküraktivität nachweisbar. Sensible Nervenleitgeschwindigkeiten und kortikale Medianus-SEP blieben auch im Verlauf unauffällig. Die Biopsie des N. suralis konnte aber jeweils eine eindeutige leichte Beteiligung sensibler Nervenfasern, z. T. in Form von primärer Demyelinisierung, belegen. Somit handelt es sich bei diesen Fällen trotz der klinischen und elektrophysiologischen Befunde um gemischt motorisch-sensible Läsionen. Obwohl es im Verlauf zu einer kompletten Denervierung der Extremitätenmuskulatur mit Tetraparalyse kam, sind sie offenbar eher einer sekundär axonalen Variante zuzurechnen. Im Gegensatz zu positiven Literaturberichten blieb die immunmodulierende Therapie in allen 3 Fällen wirkungslos.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 85 (1993), S. 644-648 
    ISSN: 1432-2242
    Keywords: Sorghum bicolor ; Post-anthesis drought tolerance ; Charcoal rot resistance ; Breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Nonsenescence is a delayed leaf and plant death resistance mechanism in sorghum that circumvents the detrimental effects of reduced soil moisture combined with high temperatures during post-anthesis growth. This drought-tolerance mechanism is often equated with charcoal rot resistance, a widespread root and stalk disease of great destructive potential. Therefore, the inheritance of charcoal rot resistance was investigated directly, by exposure of sorghum to Macrophomina phaseolina, the causal organism, and indirectly, by determination of the inheritance of nonsenescence. Sorghum families derived from diallel crosses between two nonsenescent, resistant inbreds (B35, SC599-11E) and two senescent, susceptible inbreds (BTx378, BTx623) were evaluated in 1989 at College Station and at Lubbock, Texas, under controlled and field conditions. We determined that nonsenescence was regulated by dominant and recessive epistatic interactions between two nonsenescence-inducing loci and a third locus with modifying effects. The same conclusion was reached for charcoal rot resistance. The presence of different genetic mechanisms within SC599-11E for nonsenescence and charcoal rot resistance verifies that these two forms of resistance are not different manifestations of a single trait, i.e., they are not to be equated with each other. We conclude that nonsenescence alone cannot account for, and should not be used as the sole breeding criterion for, resistance to charcoal rot in sorghum.
    Type of Medium: Electronic Resource
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