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  • 1
    ISSN: 1040-452X
    Keywords: Flow cytometry ; Sperm sorting ; DNA staining ; Bovine Y specific probe ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Flow cytometry is a potential method for the separation of X and Y bearing spermatozoa, on the basis of their relative DNA content evaluated by the fluorescence emission intensity due to specific fluorochrome DNA staining. However, spermatozoa DNA is highly condensed and nuclei exhibit flat non spherical shape, which can produce artefacts impeding accurate analysis. In order to avoid these limitations, decondensation of DNA performed by enzymatic treatment and a modification of the flow cytometer that orients the spermatozoa relative to the laser beam are generally used. In this work, we describe alternative methods and materials for selection of (1) decondensed and thus dead spermatozoa without orientation, sorted on the basis of only the 10% spermatozoa containing the least DNA (expected Y) and the 10% spermatozoa containing the more DNA (expected X), or (2) native spermatozoa homogeneously oriented using a simultaneous measurement of Axial light loss (extinction) and Forward angle light scatter. For testing enrichment of each selected fraction we have worked out a molecular hybridization procedure using X and Y specific DNA probes. We analyse and sort bull spermatozoa on these basis: the purity obtained for these fractions is 80% without orientation after enzymatic treatment, and 70% on live spermatozoa “optically” oriented.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Ballonplatzhalter ; CCAM ; Pneumonektomie ; Pneumothorax ; Key words Balloon prothesis ; CCAM ; Pneumonectomy ; Pneumothorax
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The rarely occurring bilateral CCAM has a poor prognosis. Case Report: At birth boy E. presented with respiratory distress. His bilateral severe CCAM was misdiagnosed until the typical bullous x-ray pattern developed within the first few days of life. His condition deteriorated despite conservative treatment. Facing respiratory and cardiac decompensation he underwent unilateral pneumonectomy. The diagnosis was histologically confirmed. A refillable balloon was implanted to prevent mediastinal shifting. Boy E. stabilized gradually and came off both CPAP and supplementary oxygen. At age 1 y, during a course of severe pneumonia he died of sudden cardiac arrest. Discussion: According to the literature, bilateral severe CCAM unequivocally leads to death within days or weeks. In contrast, our patient improved gradually after surgery. But, CCAM bears an increased risk of cardial decompensation in infancy which surgery can reduce but not eliminate. For the time being, in cases of severe bilateral CCAM there is no effective treatment modality other than surgery.
    Notes: Zusammenfassung Folgen der seltenen beidseitigen pulmonalen CCAM sind hochgradige Ateminsuffizienz und rechtskardiale Belastung mit Dekompensation typischerweise innerhalb weniger Lebenstage. Fallbericht: Unser Patient fiel als Neugeborenes durch respiratorische Insuffizienz auf. Eine beidseitige CCAM wurde initial als Atemnotsyndrom verkannt. Auch nach zügiger Diagnosestellung drohte unter konservativer Therapie die respiratorische und kardiale Dekompensation, weshalb wir uns zur einseitigen Pneumonektomie mit Einlage eines Ballonplatzhalters entschlossen. Die Histologie bestätigte unsere radiologische Diagnose. Im weiteren Verlauf zeigte sich zunächst eine Stabilisierung; der Patient war zeitweilig ohne Atemhilfe oder supplementären Sauerstoff. Mit 1 Jahr kam es zum Sekundenherztod im Rahmen einer schweren Pneumonie. Entgegen der kurzfristig infausten Literaturprognose berichten wir von einem zunächst guten Behandlungserfolg. Diskussion: In Analogie zur bronchopulmunalen Dysplasie ist ein bis zum 3. Lebensjahr wesentlich erhöhtes Risiko der kardialen Dekompensation anzunehmen. Die Operation kann dieses Risiko nur mindern, nicht ausschließen. In Anbetracht des – wenngleich temporären – Operationserfolgs halten wir therapeutischen Nihilismus bei beidseitiger CCAM für unangebracht.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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