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  • 1
    ISSN: 1432-0533
    Keywords: Calcium binding proteins ; Global cerebral ischemia ; Immunocytochemistry ; Selective vulnerability ; Thalamic reticular nucleus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The thalamic reticular nucleus (NRT) is one of the most vulnerable structures to selective neuronal damage both in human cardiac arrest patients and in experimental rodent global cerebral ischemia models. The detailed distribution of neuronal injury within the NRT was examined following 10-min cardiac arrest in the rat with conventional Nissl staining, 45Ca autoradiography and immunocytochemistry of the calcium binding proteins parvalbumin (PV) and calretinin (CR). While Nissl staining was almost unable to show the exact boundary of the nucleus and of the lesion, immunocytochemistry of PV proved to be the most useful index of the exact location and extent of neuronal loss in the NRT after ischemia. Calcium autoradiography was a sensitive method for detecting the lesion, and showed a similar distribution to the loss of PV staining, but did not give optimal spatial resolution. Quantitative analysis of PV staining at 7 days of recirculation demonstrated cell loss restricted to the lateral aspect of the middle segment of the NRT, identical with the distribution of large fusiform neurons in the somatosensory component of the nucleus. CR-positive neurons in the NRT were completely spared, although not all surviving neurons contained CR. These studies provide the first detailed characterization of the distribution of vulnerable neurons within the NRT after experimental ischemia and suggest that immunocytochemistry of PV is a useful tool for quantitative analysis of the lesion for use in further experiments to elucidate the mechanisms of selective vulnerability of the NRT.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Key words Calcium binding proteins ; Global ; cerebral ischemia ; Immunocytochemistry ; Selective ; vulnerability ; Thalamic reticular nucleus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The thalamic reticular nucleus (NRT) is one of the most vulnerable structures to selective neuronal damage both in human cardiac arrest patients and in experimental rodent global cerebral ischemia models. The detailed distribution of neuronal injury within the NRT was examined following 10-min cardiac arrest in the rat with conventional Nissl staining, 45Ca autoradiography and immunocytochemistry of the calcium binding proteins parvalbumin (PV) and calretinin (CR). While Nissl staining was almost unable to show the exact boundary of the nucleus and of the lesion, immunocytochemistry of PV proved to be the most useful index of the exact location and extent of neuronal loss in the NRT after ischemia. Calcium autoradiography was a sensitive method for detecting the lesion, and showed a similar distribution to the loss of PV staining, but did not give optimal spatial resolution. Quantitative analysis of PV staining at 7 days of recirculation demonstrated cell loss restricted to the lateral aspect of the middle segment of the NRT, identical with the distribution of large fusiform neurons in the somatosensory component of the nucleus. CR-positive neurons in the NRT were completely spared, although not all surviving neurons contained CR. These studies provide the first detailed characterization of the distribution of vulnerable neurons within the NRT after experimental ischemia and suggest that immunocytochemistry of PV is a useful tool for quantitative analysis of the lesion for use in further experiments to elucidate the mechanisms of selective vulnerability of the NRT.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 10 (1968), S. 117-122 
    ISSN: 1432-0533
    Keywords: Blood-brain barrier ; Vascular permeability ; Development of BBB ; Fluorescein labeled protein transfer ; Fluorescence microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wurde eine Untersuchung der Permeabilität der Hirngefäße für Albumin im Verlaufe der Entwicklung durchgeführt. Fluorescenz-markiertes Rinder-Serumalbumin wurde in eine Schwanzvene von neugeborenen, jungen und erwachsenen Ratten sowie in die Umbilicalarterie von Embryonen zwischen dem 15. und 21. Schwangerschaftstag injiziert. Die Verteilung der markierten Substanz wurde fluorescenzmikroskopisch nachgewiesen. In den Gehirnen embryonaler und postnataler Ratten war das fluorescenzmarkierte Albumin streng auf das Lumen der Blutgefäße beschränkt, während im subeutanen Gewebe eine erhebliche extravasale Passage nachgewiesen werden konnte. Die Befunde sprechen dafür, daß bei Rattenembryonen die Hirngefäße zumindest ab dem 15. Schwangerschaftstag für Albumin undurchlässig sind.
    Notes: Summary A study was made on the permeability of cerebral blood vessels to albumin during development. Fluorescent labeled bovine serum albumin was injected into a tail vein of newborn, young and adult rats and into the umbilical artery of embryos from the fifteenth to the twenty-first day of pregnancy. The distribution of the tracer was ascertained by means of fluorescence microscopy. In the brains of the embryos and postnatal rats the fluorescent albumin was strictly confined to the lumen of the blood vessels, while considerable extravascular passage was observed in subcutaneous tissue. The results indicate that in rat embryos the cerebral blood vessels are impermeable to albumin at least as early as the fifteenth day after fertilization.
    Type of Medium: Electronic Resource
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