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  • 1
    ISSN: 1432-1440
    Keywords: Muskeldystrophie vom Duchenne-Typ ; Membrandefekt ; Capping ; Konduktorinnen ; Duchenne muscular dystrophy ; Membrane defect ; Capping ; Carrier detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Recent results showed that Duchenne muscular dystrophy is probably associated with a generalized membrane defect. The capping phenomenon in lymphocytes indicates normal intramembrane protein mobility and disturbances of this phenomenon are is believed to reflect membrane alterations. We have investigated capping in lymphocytes from 19 patients with Duchenne muscular dystrophy, 13 carriers, 8 patients' sisters, 14 patients' aunts and 52 normal controls. All 19 patients showed a reduction in capping both with fluorescein conjugated polyvalent goat antiserum (mean±SD=18.5±5.2%) and with fluorescein labeled Concanavalin A (mean±SD=10.8±3.2%) as compared to controls. Normal persons (n=52) have a mean of 50.2±9.9% (SD) capping with polyvalent anti-immunoglobulin (range: 32–72.5%) and 25.6±3.6% with F-Con A (range: 18.5–31.5%). 12 of the 13 mothers, as well as 5 of the 8 patients' sisters, also exhibited decreased lymphocyte capping to the same extent as the patients. Creatine kinase activity (CK) was elevated only in 4 mothers and 2 of the sisters. Our results indicate that this method might be of value in detecting carriers and can yield less false negative results as the CK-activity test.
    Notes: Zusammenfassung Es liegen Hinweise dafür vor, daß der progressiven Muskeldystrophie vom Duchenne-Typ (DMD) ein generalisierter Membrandefekt zugrunde liegt. Eine Möglichkeit zum Nachweis einer gestörten Membranfunktion stellt die Untersuchung des Capping-Phänomens von Lymphozyten dar. Es handelt sich dabei um eine fluoreszenzmikroskopisch erfaßbare Umverteilung der Oberflächen-Rezeptoren nach Antigenkontakt. Wir haben das Capping-Phänomen bei 19 Patienten und Angehörigen von 13 Familien mit DMD untersucht und dabei folgende Ergebnisse gewonnen: Lymphozyten von Kontrollpersonen zeigten mit Fluorescein markiertem Antiserum gegen Immunglobuline mit 50,2±9,9% (Mittelwert±SD) ein positives Capping-Phänomen und mit Fluorescein markiertem Concanavalin A (F-Con A) 25,6±3,6% (Mittelwert±SD). Demgegenüber war bei Patienten mit DMD, bei denen stark erhöhte Kreatin-Phosphokinase Werte (CK) gefunden wurden, das Capping-Phänomen mit Antiserum auf durchschnittlich 18,5±5,2% (Mittelwert±SD) vermindert und mit F-Con A auf 10,8±3,2% (Mittelwert±SD). Bei 12 der 13 Mütter, sowie bei 5 der 8 Schwestern der Patienten wurde ein vermindertes Capping in demselben Ausmaß wie bei den Patienten nachgewiesen. CK-Aktivität war jedoch nur bei 4 Mütter und 2 Schwestern pathologisch erhöht. Unser Ergebnis unterstützt die Hypothese, daß die Muskeldystrophie vom Duchenne-Typ mit einem generalisierten Membrandefekt einhergeht. Dieser Defekt läßt sich mittels Capping außerdem auch bei sonst “stummen” Konduktorinnen nachweisen. Diese Methode könnte sich bei der genetischen Beratung als wertvoll erweisen, da sie nach den bisherigen Ergebnissen weniger falsch negative Resultate liefert, als die alleinige Bestimmung der CK-Aktivität im Serum.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1076
    Keywords: Duchenne muscular dystrophy ; Membrane defect ; Capping ; Carrier detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract There has been considerable interest in capping of lymphocytes in patients with Duchenne muscular dystrophy (DMD). However, the results from different authors are controversial. We have investigated cap formation in thirteen families with DMD, using a method standardized in our laboratory, and could establish diminished capping in all 12 patients and in 12 of the 13 mothers. By examining cap formation simultaneously with whole polyvalent antiserum, with F(ab)2 fragment of polyvalent antiserum, and with monospecific antisera we could also confirm this observation of defective capping in 7 patients and 4 carriers, as compared to 9 control subjects likewise examined. We have indications that treatment of the lymphocytes under unfavourable conditions e.g. preincubation in buffer solution might accentuate the decrease of lymphocyte capping in patients and carriers.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 146 (1987), S. 363-364 
    ISSN: 1432-1076
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1076
    Keywords: Mitochondria ; NADH dehydrogenase ; Retinal vessels ; Optic nerve ; Seizures, newborn
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A newborn male with mitochondrial complex I deficiency suffered from neonatal epileptic seizures, which later developed into infantile spasms. The infant was blind due to aplasia of the retinal vessels and hypoplasia of the optic nerve. There was congenital lactic acidosis, which persisted in later life. The boy was microcephalic and retarded. Muscular hypotonia later shifted to spasticity. Succinic acid was increased in urine. We assume that the aplasia of the retinal vessels is due to damage of the retinal ganglion cells caused by the mitochondrial disease in the first 3 to 4 months of pregnancy.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 883 (1986), S. 598-603 
    ISSN: 0304-4165
    Keywords: (Muscle) ; Adenylate kinase ; Duchenne muscular dystrophy
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0090-6980
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Nonketotische Hyperglyzinämie ; Dextromethorphan ; Key words Nonketotic hyperglycinemia ; Dextromethorphan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Patients: We report on four infants with nonketotic hyperglycinemia, three with a neonatal form and one with the milder infantile form. Despite early diagnosis and persistent therapy including dextromethorphan and sodium benzoate, two infants with the neonatal form deteriorated progressively and died at the age of 16 and 50 months, respectively, only one survived severely retarded with seizures, opisthotonus and spastic quadriplegia. The serum concentrations of glycine decreased following sodium benzoate treatment but cerebrospinal fluid/serum glycine ratio remained elevated with no improvement in clinical outcome. The patient with the infantile form has been treated for over three years with dextromethorphan, and is now a severely retarded child without seizure activity and continuous psychomotor development. Discussion: Symptomatic therapy including grand mal anticonvulsive drugs may be considered in neonatal hyperglycinemia as there are irreversible prenatal brain damage and a lack of therapeutic success. Its positive tendency in our infantile case suggests that dextromethorphan therapy may provide a better outcome only in infantile forms. Since no effective treatment is available, prenatal diagnosis in families at risk is of paramount importance.
    Notes: Zusammenfassung Patienten: Wir berichten über Therapie und Verlauf bei 4 Patienten mit nonketotischer Hyperglyzinämie, 3 Mädchen mit neonataler und 1 Junge mit infantiler Form. Trotz früher Diagnosestellung und Mehrfachtherapie inklusive Dextromethorphan und Na-Benzoat kam es bei 2 Mädchen mit neonataler Form zu einem therapierefraktären Verlauf und zum Exitus im Alter von 16 bzw. 50 Monaten, die 3. Patientin überlebte mit schwerster psychomotorischer Retardierung, Opisthotonus, Tetraspastik und Anfallsleiden. Na-Benzoat führte zwar zu einer Absenkung der Glyzinkonzentration (bei stets pathologischer Liquor-Serum-Glyzin-Ratio), konnte den deletären Verlauf jedoch nicht beeinflussen. Der Patient mit der infantilen Form ist schwer psychomotorisch retardiert, zeigt aber unter Dextromethorphan seit nunmehr über 3 Jahren stete Entwicklungsfortschritte und Anfallsfreiheit. Diskussion: Bei der neonatalen nonketotischen Hyperglyzinämie kann derzeit nur eine symptomatische Therapie inklusive eines Grand-mal-Schutzes empfohlen werden, da die Hirnläsion bereits intrauterin erworben und keine effektive Therapie bekannt ist, bei der infantilen Form ist ein Therapieansatz mit Dextromethorphan gerechtfertigt. Eine Pränataldiagnose in „Risikofamilien” ist unverzichtbar.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Child's nervous system 9 (1993), S. 328-330 
    ISSN: 1433-0350
    Keywords: Meningomyelocele ; Tethered cord ; Somatosensory evoked potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Progressive neurological deterioration may occur after meningomyelocele repair. Magnetic resonance imaging almost invariably demonstrates a conus medullaris in an abnormally low position, whether neurological symptoms develop or not. Surgery of a secondary tethered cord is indicated when progression of neurological symptoms is documented. We performed a longitudinal study of posterior tibial nerve somatosensory evoked potentials (SSEPs) in children and adolescents after neonatal meningomyelocele repair. All patients were able to walk. Declining or negative posterior tibial nerve SSEPs were recorded in 15 patients; 14 of these had clinical signs of a secondary tethered cord. After surgery of the tethered cord, the SSEPs improved in 8 of 10 patients. Posterior tibial nerve SSEPs may contribute to the diagnosis of secondary tethered cord. After untethering, the evoked potentials demonstrate recovery of spinal cord function and might help to delineate prognosis.
    Type of Medium: Electronic Resource
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