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  • 1
    ISSN: 1432-1440
    Keywords: Key words Transforming growth factor-β ; Fibronectin ; Collagen type IV ; Glomerulosclerosis ; Glomerular epithelial cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The effect of transforming growth factor-β (TGF-β) was analyzed on the synthesis of fibronectin, collagen type IV, and urokinase plasminogen activator in human glomerular epithelial cells in culture. An increase in the abundance of specific mRNA was found for collagen type IV and fibronectin. Fibronectin protein synthesis was also increased in TGF-β treated cells; most of the de novo synthesized fibronectin was found as an unsoluble protein associated with extracellular matrix. In the same cells the amount of plasminogen activator mRNA was found leading also to a decreased surface expression of urokinase plasminogen activator. The data support the concept that by upregulating matrix protein synthesis and downregulating the plasminogen activator system, TGF-β favors the development of sclerosis.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Transforming growth factor-β ; Fibronectin ; Collagen type IV ; Glomerulosclerosis ; Glomerular epithelial cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect of transforming growth factor-β (TGF-β) was analyzed on the synthesis of fibronectin, collagen type IV, and urokinase plasminogen activator in human glomerular epithelial cells in culture. An increase in the abundance of specific mRNA was found for collagen type IV and fibronectin. Fibronectin protein synthesis was also increased in TGF-β treated cells; most of the de novo synthesized fibronectin was found as an unsoluble protein associated with extracellular matrix. In the same cells the amount of plasminogen activator mRNA was found leading also to a decreased surface expression of urokinase plasminogen activator. The data support the concept that by upregulating matrix protein synthesis and downregulating the plasminogen activator system, TGF-β favors the development of sclerosis.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Kardiologie 89 (2000), S. 698-701 
    ISSN: 1435-1285
    Keywords: Key words Thrombosis –¶thrombolysis – prosthetic valve ; Schlüsselwörter Thrombose – Thrombolyse – Klappenprothese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Eine 48-jährige Frau stellte sich mit zunehmender Dyspnoe aufgrund einer Thrombose einer Mitralkappenprothese vor. Bei der Patientin war 6 Jahre zuvor ein Mitralklappenersatz (St. Jude Medical) wegen einer Mitralstenose III durchgeführt worden. 3 Jahre später kam es zu einer Klappenthrombose, die einen Klappenaustausch (St. Jude Medical) erforderlich machte. Die transösophageale Echokardiographie zeigte jetzt vorhofseitig, auf der fixierten Kippscheibe, einen Thrombus und einen weiteren, frei flottierenden Thrombus (2,4×1,6cm) am linken Vorhofdach. Aufgrund der vorangegangenen Thorakotomien, entschloss man sich trotz des erhöhten Thromboembolierisikos zur Thrombolyse. Es erfolgte die Gabe einer reduzierten Urokinasedosis in Abhängigkeit vom Fibrinogenwert (Zielfibrinogen: 100mg/dl). Bereits nach 24 h zeigte sich eine Abnahme des mittleren diastolischen Mitralklappengradienten von 23 auf 11mmHg. Unter Fortführung der thrombolytischen Therapie wurde die Patientin beschwerdefrei und nach insgesamt 13 Tagen, war echokardiographisch eine normale Prothesenfunktion ohne Hinweis auf thrombotische Strukturen nachweisbar. Der Therapieverlauf dieser Patientin zeigt, dass eine vorsichtige thrombolytische Therapie über mehrere Tage, bei Patienten mit mäßig ausgeprägter klinischer Symptomatik, einen erfolgversprechenden Therapieansatz darstellen kann.
    Notes: Summary A 48-year-old woman presented with progressive dyspnea due to thrombosis of a mitral valve prosthesis. The patient had undergone mitral valve replacement (St.Jude Medical) six years prior to admission because of mitral stenosis (Class III); three years later the prosthesis had to be replaced (St.Jude Medical) because of valve thrombosis. At admission, transesophageal echocardiography showed a thrombus on the atrial side of the fixed valve leaflet and a thrombus (2.4×1.6cm) floating from the left atrial roof. Because of the previous thoracotomies, thrombolysis was initiated despite the mobile thrombus with the attendant risk of embolization. Urokinase was infused in a dose to maintain the fibrinogen level around 100mg/dl. After 24 h, the mean pressure gradient across the prosthetic mitral valve (measured by doppler echocardiography) had decreased from 23 to 11mmHg. After 13 days of this modified thrombolytic regimen, the clinical symptoms of the patient had resolved and echocardiography showed a normal function of the prosthetic mitral valve without evidence of residual thrombosis. This patient demonstrates that prolonged cautious thrombolysis can be effective for the treatment of prosthetic valve thrombosis in hemodynamically moderately compromised patients.
    Type of Medium: Electronic Resource
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