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  • Hair bulb papilla cells  (2)
  • Root sheath fibroblasts  (2)
  • Beeinflussung durch Serumcortisol  (1)
  • Benign aphthous disorders  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    HNO 46 (1998), S. 102-111 
    ISSN: 1433-0458
    Keywords: Schlüsselwörter Definitionen ; Benigne Aphthosen ; Morbus Behçet ; Hyperimmunogene Systemvaskulitis ; Differentialdiagnostik ; Therapie ; Prognose ; Key words Definitions ; Benign aphthous disorders ; Behçet’s disease ; Hyperimmune multisystem vasculitis ; Differential diagnoses ; Therapy ; Vital prognosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Recurrent aphthae (or aphthoses) are the most frequent inflammatory lesions of the oral mucosa. Aphthae can clearly be defined, but may also be barely discernible from aphthoid erosions and ulcers of heterogeneous origin. Although a subject of molecular research, the etiopathogenesis of oral aphthoses is still unknown. However, the clinical differentiation of a ”benign” type of aphthosis from a ”pernicious” one, such as Behçet’s disease (BD), is a diagnostic matter of great significance. BD has been found clinically in increasing numbers in central Europe and represents an (auto-)hyperimmune multisystem life-threatening vasculitis. In this disorder possible damage can occur to many visceral organs and/or the cerebrospinal system. The prognosis of BD may depend on the changing involvement of very different organs, as well as the early recognition of the disease per se. The most prominent feature is a multilesional aphthous stomatitis that is almost never absent during acute episodes of BD. Hence, the occurrence of this peculiar type of aphthosis strongly indicates an active BD. The plethora of other aphthoid lesions can be challenging to the diagnostic competence of all physicians and may confuse the correct recognition of the severity of the disease present. This review particularly details the wide range of diagnostic, therapeutic and prognostic aspects of the various oral aphthoses.
    Notes: Zusammenfassung Schubweise auftretende „idiopathische” Aphthen (bzw. Aphthosen) sind der häufigste entzündliche Läsionstyp der Mundschleimhaut. Aphthen sind nosologisch klar definiert, aber von heterogenen ähnlichen (aphthoiden) Erosionen und Ulzera oft schwer zu unterscheiden. Die Ätiopathogenese der oralen Aphthosen ist bisher ungeklärt, die Therapie daher symptomatisch. Für die klinische Primärdiagnostik hat die Unterscheidung „benigner” von „perniziösen”, den Morbus Behçet (MB) kennzeichnenden Aphthosen große praktische Bedeutung. Der auch in Mitteleuropa zunehmend häufiger auftretende MB verläuft als (auto-)hyperimmunogene Systemvaskulitis in ggf. lebensbedrohlichen Schüben mit Gefäßaffektionen viszeraler Organe und/oder des Zentralnervensystems. Die stets dubiöse Prognose des MB hängt nicht nur vom oft wechselhaften Organbefall, sondern auch von der rechtzeitigen Diagnose und Therapie ab. Leitbefund ist die im akuten Krankheitsschub auffallende multiläsionale „Stomatitis aphthosa”, deren diagnostische Assoziation mit den anderen Krankheitsmanifestationen die Voraussetzung adäquater Intensivtherapie bietet. Die Fülle aphthoider Pathomimien von „idiopathischen” Aphthosen fordert die Kompetenz des HNO-Arztes heraus. Daher werden differentialdiagnostische, therapeutische und prognostische Aspekte der verschiedenen oralen Aphthosen hervorgehoben.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 280 (1988), S. 185-186 
    ISSN: 1432-069X
    Keywords: Human hair bulb papilla cells ; Root sheath fibroblasts ; Dermal fibroblasts ; Chemoattractants ; Chemotactic response
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 271 (1981), S. 41-47 
    ISSN: 1432-069X
    Keywords: DNA synthesis activity of keratinocytes ; Diurnal rhythm of 3H-labeling index ; Influence of serum cortisol ; DNA-Syntheseaktivität der Keratinocyten ; Tagesrhythmik des 3H-Index ; Beeinflussung durch Serumcortisol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 12 gesunden männlichen Erwachsenen (Alter zwischen 20 und 27 Jahre) wurden zwei Langzeistudien über 48 und 66 h unter standardisierten äußeren Versuchsbedingungen durchgeführt, um Einblick in den tagesperiodischen Verlauf der Proliferationsaktivität der epidermalen Keratinocyten in Abhängigkeit vom Serumcortisolspiegel zu erhalten. Hierzu wurden in Stanzbiopsien der Haut der 3H-Thymidin-Markierungsindex in vitro mittels Autoradiographie und die Cortisolkonzentration im Venenblut mittels Radioimmunoassay alle 6 h bestimmt. Während der Cortisolspiegel typische circadiane Schwankungen während der gesamten Versuchszeit aufwies, ließen sich circadiane Schwankungen des epidermalen Markierungsindex erst ab 12 h nach Versuchsbeginn nachweisen. Als Ursache dieser zeitlichen Verzögerung wird eine initiale versuchsabhängige “Desynchronisation” im Zellcyclus der Keratinocyten diskutiert. Circadiane Maxima und Minima des Cortisolspiegels und der Proliferationsaktivität der Keratinocyten waren zueinander negative korreliert, wobei — unter den gewählten Zeitabständen des Versuchs — der Beginn des abendlichen Anstiegs der Proliferationsaktivität dem mitternächtlichen Tiefpunkt der Cortisolsekretion jeweils um 6 h vorausging. Die vor allem in den 66 h-Experimenten erhobenen proliferationskinetischen und hormonanalytischen Daten sprechen also nicht nur für eine — im Vergleich zu Versuchstieren schwächer ausgeprägte — tagesrhythmische Periodizität der epidermaen Proliferation, sondern auch für deren (wahrscheinlich indirekte) Regulation durch den endogenen Cortisolspiegel im Blut.
    Notes: Summary Performing two longitudinal studies over 48 and 66 h, respectively, in 12 healthy male adult volunteers the epidermal LI were measured by in vitro 3H-thymidine labeling technique every 6 h and serum cortisol levels simultaneously by RIA examination. While serum cortisol showed a circadian rhythm over the whole test period, a circadian rhythmic pattern of epidermal LI yet became evident 12 h after the onset of experiments. This initial time lag in appearance of LI periodicity may be due to some temporal desynchronization in the cell cycle of keratinocytes. Circadian peaks and minima of both cortisol and LI were found to be inversely correlated, with a time-shifting of 6 h according to the experimental conditions. The present results reveal strong evidence that circadian fluctuation of endogenous cortisol secretion does influence the regulation of epidermal DNA-synthesis in man.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-069X
    Keywords: Hair bulb papilla cells ; Hair root sheath fibroblasts ; Proliferation in vitro ; DNA flow cytometry ; Effect of different pharmacological agents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Comparative studies on growth kinetics of cultivated human hair bulb papilla cells (PCs) and hair root sheath fibroblasts (RSFs) yielded evidence of some pecularities of PCs in both proliferative behavior and morphological growth pattern. As the dermal papilla, essentially supporting the nutrition of matrix epithelium, can be considered a target tissue for agents influencing maintenance of hair growth, we studied the effects of epidermal growth factor (EGF), fibroblasts growth factor (FGF), minoxidil (Mino), and hydrocortisone (HC) on the proliferation of PCs and RSFs, both gained from dissected hair follicles of scalp biopsy specimens of two male adults and separately cultured in vitro. EGF and FGF proved to increase proliferation of both PCs and RSFs most, yet at a different intensity for each cell group. HC slowed proliferation, and Mino failed to influence growth of PCs and RSFs.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-069X
    Keywords: Hair bulb papilla cells ; Root sheath fibroblasts ; Cell culture ; Growth pattern ; DNA flow cytometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Dermal papillae isolated from anagen hair bulbs obtained from biopsy specimens from five subjects with normal hair pattern, and fibroblasts derived from the mesenchymal root sheaths (RSF) of the same hair follicles were separately grown in culture and the cellcycle distribution pattern on different days was analysed by applying DNA flow cytometry (FCM). Papilla cells (PC) exhibited distinctive morphological features by forming cell aggregates differing from RSF with respect to cell shape and growth pattern. They also proliferated remarkably more slowly than RSF. DNA-FCM analysis showed that both PC and RSF demonstrated synchronous fluctuations in the percentage of cells in G1/0, S and G2+M phases during the period of subculture.
    Type of Medium: Electronic Resource
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