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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 142 (2000), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Pseudoscleroderma as a paraneoplastic syndrome is a rare disease. We report here a patient with lung cancer (undifferentiated squamous cell carcinoma), who developed acrosclerosis. Using in situ hybridization, marked expression of α1(I)-collagen and connective tissue growth factor (CTGF) mRNA was found in fibroblasts scattered throughout the dermis. However, transforming growth factor (TGF)-β1 expression was not detected. The pattern of CTGF gene expression and collagen synthesis was similar to that in systemic scleroderma. The absence of TGF-β1 mRNA could indicate that tumour-derived factors induce the expression of CTGF.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 143 (2000), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 135 (1996), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Proteoglycans are macromolecules displaying structural roles as well as regulatory functions in the maintenance of the extracellular matrix. Biglycan/PG-I and decorin/PG-II are two small proteoglycans that are structurally related but differ considerably in their localization in vivo and behaviour in vitro. Decorin and, to a minor extent, biglycan, can be located at the surface of type I collagen fibrils and have been shown to influence collagen fibrillogenesis. However, the physiological role of biglycan in the dermis is not known. Biopsies obtained from keloids were bisected and processed for total RNA extraction and immunohistochemistry. Northern blot analysis of total RNA obtained from keloids with high growth tendency in vivo showed a marked induction of biglycan and collagen α1(I) mRNA expression in comparison with total RNA obtained from normal skin or keloids with little growth tendency. In contrast, decorin mRNA expression remained largely unaltered. Studying these biopsies by immunohistochemistry, decorin expression in the dermis was unaltered comparing normal and keloid tissue, whereas a markedly increased staining for biglycan was observed in the keloid tissue, which was most pronounced in the nodular formations, and was a characteristie feature of keloids. The altered expression of biglycan in keloid tissue might be involved in the abnormal regulation of extracellular matrix deposition either through the binding of growth factors or by influencing the three-dimensional organization of collagen fibres or associated molecules.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary To elucidate the mechanisms involved in the development of cutaneous fibrosis in scleredema adultorum. we studied a patient with long-standing scleredema who had no history of diabetes mellitus or preceding febrile illness. Histological examination of a biopsy specimen from involved forearm skin demonstrated marked thickening of the dermis and accumulation of mucin between collagen bundles. Increased levels of type I collagen mRNA. as evidenced by positive in situ hybridization signals with an α1(I) procollagen cDNA were found in numerous fibroblasts throughout the dermis. The expression of several genes coding for proteins involved in the maintenance of connective tissue was examined by determining in vitro protein production and mRNA levels in fibroblasts from the affected skin. Total protein production, glucosamine incorporation and collagen synthesis, were elevated by 44–97% in scleredema fibroblasts, compared with fibroblasts from two healthy individuals. Levels of mRNAs for α1(I) and α1(III) procollagens and fibronectin were elevated in scleredema fibroblasts, whereas mRNA levels for the tissue inhibitor of metalloproteinase were unaltered compared with control cultures. The results suggest that fibroblasts from the involved skin in non-diabetic patients with scleredema may exhibit a biosynthetically activated phenotype, which persists for several years. These alterations are likely to be involved in the development of the cutaneous induration and thickening which is characteristic of this disease.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 180 (1991), S. 673-680 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 180 (1991), S. 673-680 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Der Hautarzt 48 (1997), S. 253-257 
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Juvenile hyaline Fibromatose ; Chromosomenanalyse ; Elektronenmikroskopie ; Key words Juvenile hyaline fibromatosis ; Chromosome-analysis ; Electronmicroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Juvenile hyaline fibromatosis is a rare autosomal recessive connective tissue disease first described in 1873 by Murray. Major diagnostic criteria are multiple cutaneous tumors and gingival hypertrophy; minor criteria include contractures, osteolytic lesions and a positive family history. After a normal perinatal period at the age of 6 months our 24 year old patient developed gingival hypertrophy. During the first months of life several skin coloured nodules had been noticed on the neck and in the perianal area. At the age of 15 months, these nodules began to appear more rapidly, both spontaneously and posttraumatically. The patient showed normal development, but the lesions progressed. By the age of 15 years, the patient had extensive deformities and was unable to walk and move by himself. Both his sisters and the unrelated parents had no lesions. Essential for the diagnosis are the clinical picture and the histology. Electron microscopy is helpful to support the diagnosis. Defective connective tissue proteins such as chondroitin, collagen and mucopolysaccharides are probably the pathological defect. A therapy is so far unknown.
    Notes: Zusammenfassung Die juvenile hyaline Fibromatose ist eine sehr seltene erstmals 1873 von Murray beschriebene Bindegewebserkrankung mit autosomal rezessivem Erbgang. Diagnostische Hauptkriterien sind das Auftreten von multiplen kutanen Tumoren und Gingivahypertrophie, Nebenkriterien stellen die Entwicklung von Gelenkkontrakturen, osteolytischen Läsionen und das familiäre Vorkommen dar. Bei unserem 24jährigen Patienten zeigte sich nach unauffälliger Geburt und Neugeborenenperiode im Alter von 6 Monaten im Zusammenhang mit der Dentition eine Gingivahypertrophie. In den ersten Lebensmonaten fielen kleine hautfarbene Knötchen im Nacken sowie perianal auf, die nachfolgend ab dem 15. Lebensmonat verstärkt sowohl spontan, aber vornehmlich posttraumatisch, auftraten. Im weiteren Verlauf zeigte sich bei normaler geistiger Entwicklung eine deutliche Progredienz der Hautveränderungen mit nachfolgenden multiplen schwersten Deformationen der Extremitäten sowie Gelenksteifigkeit und Bewegungseinschränkungen, so daß ab dem 15. Lebensjahr eine selbständige Fortbewegung kaum mehr möglich war. Beide Geschwister und die nicht blutsverwandten Eltern des Patienten haben keinerlei auffällige Hautveränderungen. Wegweisend für die Diagnosesicherung sind Klinik und Histologie. Die elektronenmikroskopischen Befunde können wertvolle Zusatzinformationen liefern und die Diagnose bestätigen. Aufgrund einer gestörten Bildung von Bindegewebsproteinen kommt es zu Ablagerungen von Chondroitin, Kollagen und Mukopolysacchariden in den fibroblastären Zellen und im dermalen Bindegewebe. Eine wirksame Therapie der Haut- und Gelenksveränderungen existiert nicht.
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