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  • 1
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Papulöse Muzinose ; Lichen myxoedematosus ; Mucopolysaccharide ; Angiome ; Plasmapherese ; Key words Papular Mucinosis ; Lichen myxoedematosus ; Mucopolysaccharides ; Angioma ; Plasmapheresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A 23 year old female patient presented with a 14 year history of cutaneous mucinosis. Her hands showed indurated edema with acrocyanosis and severe reduction in motility, while her face was red, edematous and revealed numerous small angiomas. In the sacral region, she had a large elevated skin colored plaque. On the basis of clinical findings, histology and further laboratory tests the disease was classified as papular mucinosis (lichen myxoedematosus). In view of the severe suffering of the young patient and an unsuccessful previous therapy with chloroquine, we decided to employ plasmapheresis as a single therapy. After the first treatment course there was an improvement in her skin condition. After a total of four plasmapheresis courses over a period of 18 months (total exchange volume of 38,4 l) there was an objective flattening of the plaques and reduction of the finger swelling. This case demonstrates that monotherapy of plasmapheresis is an effective mode of treatment for cutaneous mucinosis, a disease which is extremely difficult to treat.
    Notes: Zusammenfassung Eine 23jährige Patientin stellte sich mit einer seit dem 9. Lebensjahr bekannten kutanen Muzinose vor. Die Hände zeigten teigige Schwellungen und Akrozyanose und starke Bewegungseinschränkung, das Gesicht wies zahlreiche Angiome und Ödeme auf, in der Sakralregion war ein dicker hautfarbener Plaque vorhanden. Nach Hautbefund, Histologie und weiteren klinischen Befunden wurde die Erkrankung als papulöse Muzinose (Lichen myxoedematosus) eingeordnet. Wegen des starken Leidensdruckes der noch jungen Patientin und eines bereits erfolglos durchgeführten Therapieversuches mit Chloroquin entschieden wir uns für den therapeutischen Einsatz der Plasmapherese ohne Begleittherapie. Bereits nach dem ersten Behandlungszyklus zeigte sich ein gebesserter Haut- und Allgemeinzustand. Nach insgesamt 4 Zyklen über einen Zeitraum von 18 Monaten (Gesamtaustausch ca. 38,4 l) war ein objektiver Rückgang der Plaques und insbesondere der Fingerschwellungen erkennbar. Die Plasmapherese ist eine effektive Behandlung für schwere Formen der kutanen Muzinose, die ansonsten therapeutisch schwer zugänglich ist.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2048
    Keywords: Carotenoids ; Chlorophylls ; Herbicides ; Phytochrome ; Plastid development ; Ribulosebisphosphate carboxylase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Treatment of the mustard (Sinapis alba L.) seedling with the herbicide SAN 9789 inhibits synthesis of colored carotenoids and interferes with the formation of plastid membrane lipids without affecting growth and morphogenesis significantly. In farred light, which is hardly absorbed by chlorophyll, development of plastid ultrastructure, synthesis of ribulosebisphosphate carboxylase and synthesis of chlorophyll are not affected by SAN 9789. It is concluded that normal phytochrome actions on plastid structural development, protein and chlorophyll syntheses are not affected by the absence of carotenoids provided that there is no significant light absorption in chlorophyll. The findings show that the inhibition of synthesis of one set of plastid membrane components (the carotenoids) does not stop synthesis of other components such as chlorophyll and does not halt membrane assembly. Supplementary experiments with the closely related compound SAN 9785, which affects the amount and composition of plastid lipids but not carotenoid and chlorophyll syntheses, suggest that the effect of the herbicide SAN 9789 is due exclusively to its inhibition of synthesis of colored carotenoids. In the presence of SAN 9789 white or red light at high fluence rate causes photodestruction of chlorophyll and ribulosebisphosphate carboxylase and photodecomposition of thylakoids. These effects are interpreted as resulting exclusively from the self-photooxidation and photosensitizing action of chlorophyll once the protection by carotenoids of chlorophyll against self- and sensitized photooxidation is lost.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Planta 148 (1980), S. 279-286 
    ISSN: 1432-2048
    Keywords: Carotenoids ; Chlorophylls ; Light control ; Phytochrome ; Plastid development ; Sinapis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Carotenoid accumulation in the cotyledons of the mustard seedling (Sinapis alba L.) is controlled by light. Besides the stimulatory function of phytochrome in carotenogenesis the experiments reveal the significance of chlorophyll accumulation for the accumulation of larger amounts of acrotenoids. A specific blue light effect was not found. The data suggest that light exerts its control over carotenoid biogenesis through two separate mechanisms: A phytochrome regulation of enzyme levels before a postulated pool of free carotenoids, and a regulation by chlorophyll draining the pool by complex-formation.
    Type of Medium: Electronic Resource
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