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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 157 (1998), S. S102 
    ISSN: 1432-1076
    Keywords: Key words Homocysteine ; Atherosclerosis ; Redox thiol status ; Endothelium ; Nuclear factor κB ; Protein folding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Vascular disease associated with increased blood concentrations of homocysteine has been known for many years. However, the pathobiochemical mechanisms leading to vasculopathy are still unknown. Several attempts have been made to establish in vitro model systems for the evaluation of homocysteine specific effects in cultured cells. It was concluded from these experiments, that hyperhomocysteinemia has to be considered as a risk factor for atherosclerosis exerting its effects mainly by mechanisms involving oxidative damage. Here, we summarize the homocysteine induced cellular effects which may be due to alterations of the redox thiol status. Effects specific for homocysteine are demonstrated working on different levels of cellular processes involving protein folding and regulation of nuclear factor κB (NF-kB) controlled gene transcription, the latter opening a new perspective for a novel pathway by which homocysteine might enhance chronic inflammation of the endothelium and possibly contributes to the development of atherosclerosis.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Photochemistry and Photobiology A: Chemistry 56 (1991), S. 381-385 
    ISSN: 1010-6030
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Trends in Cell Biology 2 (1992), S. 227-231 
    ISSN: 0962-8924
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Brain and Language 27 (1986), S. 56-74 
    ISSN: 0093-934X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Linguistics and Literary Studies , Medicine , Psychology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-198X
    Keywords: Key words Rickets ; De Toni-Debré-Fanconi syndrome ; Lactaturia ; Mitochondriopathy ; Cytochrome c oxidase deficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  A 2-year-old boy who developed hypophosphatemic rickets without signs of muscular weakness or neurological disturbances is presented. Biochemical findings included hypophosphatemia, metabolic acidosis, hypouricemia, hyperphosphaturia, severe glucosuria, generalized hyperaminoaciduria, hypercalciuria, proteinuria with elevated excretion of IgG, transferrin, albumin and high levels of α-1-microglobulin. Urine concentration capacity and creatinine clearance were normal. Lactaturia without elevated levels of plasma lactate and a high urinary excretion of β-hydroxybutyrate were suggestive for mitochondriopathy. Partial deficiency of cytochrome c oxidase (complex IV of the respiratory chain) was found in skeletal muscle. A renal biopsy specimen demonstrated enlarged mitochondria with abnormal arborization and disorientation of the cristae in the proximal tubular cells. Reduced activity of mitochondrial cytochrome c oxidase in tubular cells could be demonstrated by ultracytochemistry. In conclusion, rickets due to the renal Fanconi syndrome can be the first clinical sign of mitochondrial cytopathies without extrarenal symptoms. Elevated excretion of lactate and ketone bodies in urine may serve as a diagnostic marker.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Monatsschrift Kinderheilkunde 145 (1997), S. 1307-1311 
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Marfan-Syndrom ; Echokardiographie ; Aortenektasie ; Mitralklappenrolaps ; β-Blocker-Therapie ; Key words Marfan’s syndrome ; Infancy ; Echocardiography ; Mitral valve prolaps ; Aortic ectasia ; β-blockers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Background: Cardiovascular involvement is frequent in Marfan’s syndrome and crucial for the prognosis in many cases. The aim of this study was to determine the frequency and severity of cardiovascular disorders in children and adolescents with Marfan’s Syndrome. Methods: Echocardiographic and colour doppler flow studies were performed in 44 patients with a mean age of 9,2 years (0,2–19,2). In addition to the standard M-mode measurements, the aortic diameter was determined at four discrete points (aortic valve anulus, aortic sinus, aorta ascendens, aortic arch) by two-dimensional echocardiography. The data were compared with the literature, and a control group of 80 healthy children with a mean age of 9,4 years (0,1–19,2). Results: 86% of the patients showed at least one pathologic echocardiographic abnormality: Aortic root ectasia was found in 84%, and mitral valve prolaps in 59%. Colour flow doppler detected mitral regurgitation in 25%. 7% of the patients showed aortic insufficiency, and 7% had tricuspid valve involvement. In patients with the Marfan syndrome left atrial diameter corrected for body surface area was significantly greater with 2,22±0,72 cm/m2 than in the control group with 1,15±0,38 cm/m2. Left ventricular enddiastolic diameter and fractional shortening showed no difference between the two groups. Conclusions: Even in childhood and adolescence severe cardiovascular changes can be found in Marfan’s syndrome. These patients should be regarded as a risk population needing close cardiologic follow-up. If aortic ectasia is detected a prophylactic medication with β-blockers is recommended.
    Notes: Zusammenfassung Hintergrund: Kardiovaskuläre Veränderungen stellen eine häufige Komplikation des Marfan-Syndroms dar und entscheiden in vielen Fällen über den Verlauf und die Prognose. Das Ziel der vorliegenden Untersuchung war, die Häufigkeit und Schwere kardiovaskulärer Veränderungen im Rahmen des Syndroms bei Kindern und Jugendlichen zu ermitteln. Methode: 44 Patienten in einem mittleren Alter von 9,2 Jahren (0,2–19,2 Jahre) wurden einer ausführlichen echokardiographischen und farbdopplersonographischen Untersuchung unterzogen. Der Aortendurchmesser wurde zusätzlich an 4 Meßpunkten im zweidimensionalen Echokardiogramm bestimmt. Als Vergleich dienten Referenzwerte aus der Literatur sowie 80 herzgesunde Kinder in einem mittleren Alter von 9,4 Jahren (0,1–19,2 Jahre). Ergebnisse: Bei 86% der Patienten fand sich mindestens ein pathologischer echokardiographischer Befund. Bei 84% bestand eine Ektasie der Aorta ascendens, überwiegend im Bereich der Aortenwurzel. Bei 59% konnte ein Mitralklappenprolaps nachgewiesen werden. In 25% der Fälle lag eine Mitralinsuffizienz vor. Eine Aorteninsuffizienz sowie Veränderungen an der Trikuspidalklappe bestanden in jeweils 7%. Bezogen auf die Körperoberfläche war der Durchmesser des linken Vorhofs bei den Patienten mit 2,22±0,72 cm/m2 gegenüber den Gesunden mit 1,15±0,38 cm/m2 signifikant erhöht, wogegen sich kein Unterschied im enddiastolischen Durchmesser sowie der Pumpleistung des linen Ventrikels zeigte. Schlußfolgerungen: Patienten mit Marfan-Syndrom weisen schon im Kindes- und Jugendlichenalter in einem erheblichen Ausmaß kardiovaskuläre Veränderungen auf. Sie sind als Risikopatienten zu betrachten und bedürfen regelmäßiger kardiologischer Verlaufskontrollen. Im Fall einer Aortenektasie sollte eine β-Blocker-Therapie eingeleitet werden.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inherited metabolic disease 23 (2000), S. 83-84 
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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