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  • 1
    Electronic Resource
    Electronic Resource
    Possible occurrence of amitotic cell division during haemopoiesis in the Urodeles (1995)
    Springer
    Comparative clinical pathology 5 (1995), S. 183-188 
    Details
    ISSN: 1433-2981
    Keywords: Amitosis ; Haemopoiesis ; Liver ; Urodeles ; Morpho-cytochemistry ; Erythrocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The liver haemopoietic activity of three species of Urodeles (Triturus carnifex, Triturus alpestris and Speleomantes ambrosii) was examined by morphocytochemical approaches (light and electron microscopy, anti-BrdU immunocytochemistry, flow cytometry). The proliferation of haemopoietic cells, detected by the anti-BrdU labelling index, was accompanied by absence of mitotic cell division and the appearance of cells showing features of amitosis (e.g. nuclear constrictions with bundles of electron-dense chromatin) sometime positive to the anti-BrdU immuno-gold reaction. The possible unbalanced segregation of chromatin during the direct division of the nucleus was detected by flow cytometric measurement in terms of heterogeneous relative DNA content in peripheral blood cells. The presence in the bloodstream samples of cells (erythrocytes) with replicating DNA, nuclear constrictions and binucleations is also consistent with a situation of direct nuclear division.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00368042
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  • 2
    Electronic Resource
    Electronic Resource
    Changes of haemopoietic activity and characteristics of circulating blood cells in Triturus carnifex and Triturus alpestris during the winter period (1993)
    Springer
    Comparative clinical pathology 3 (1993), S. 159-163 
    Details
    ISSN: 1433-2981
    Keywords: Apoptosis ; Blood cells ; Hepatic haemopoiesis ; Hibernation ; Urodeles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Morphocytochemical correlation between proliferation (BrdU uptake) of the haemopoietic liver subcapsular tissue and peripheral blood cell characteristics was performed during active (summer) and hibernating (winter) periods in two Urodele species: Triturus carnifex and Triturus alpestris. The significant decrease of the haemopoietic cell proliferation during the hibernation was accompanied by some modifications both at erythrocyte and leucocyte level. This situation was primarily characterised by a hypofunctionality and ageing of these cells with the disappearance of immature elements from the circulation and cell loss by apoptotic mechanisms. The results indicate that the condition of low metabolism during the winter period in these Urodeles involved deep changes in the physiology of haemopoietic tissue and blood circulating cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186100
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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