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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 5 (1995), S. 176-180 
    ISSN: 1432-1084
    Keywords: Adverse reaction ; Contrast media ; Kidney ; Nephrotoxicity ; Urography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A small but significant proportion of patients given X-ray contrast agents subsequently experience a decline in renal function. Experimental studies in rats aimed at identifying the mechanism of renal effects show vacuolation of proximal convoluted tubules. This report documents that such vacuoles normally have a proteinaceous content and that14C-radiolabelled contrast agent (iodixanol) is specifically localised within the vacuolated tubules 24 h after administration. On the basis of the persistence of some large droplets in proximal tubules, a small percentage of the administered dose of X-ray contrast agent appears to be trapped intracellularly within large proteinaceous droplets (the vacuoles) and slowly released over several weeks. Enzyme histochemistry identifies contrast-medium-induced droplets as an abnormal population of lysosomes. We propose that in the absence of pre-existing renal impairment, this slowly reversing lysosomal abnormality of proximal tubules is within the kidney's functional reserve capacity.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 5 (1995), S. 176-180 
    ISSN: 1432-1084
    Keywords: Adverse reaction ; Contrast media ; Kidney ; Nephrotoxicity ; Urography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A small but significant proportion of patients given X-ray contrast agents subsequently experience a decline in renal function. Experimental studies in rats aimed at identifying the mechanism of renal effects show vacuolation of proximal convoluted tubules. This report documents that such vacuoles normally have a proteinaceous content and that 14C-radiolabelled contrast agent (iodixanol) is specifically localised within the vacuolated tubules 24 h after administration. On the basis of the persistence of some large droplets in proximal tubules, a small percentage of the administered dose of X-ray contrast agent appears to be trapped intracellularly within large proteinaceous droplets (the vacuoles) and slowly released over several weeks. Enzyme histochemistry identifies contrast-medium-induced droplets as an abnormal population of lysosomes. We propose that in the absence of pre-existing renal impairment, this slowly reversing lysosomal abnormality of proximal tubules is within the kidney's functional reserve capacity.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Comparative clinical pathology 4 (1994), S. 102-107 
    ISSN: 1433-2981
    Keywords: Antioxidant ; Butylated hydroxytoluene ; Thrombopoietin ; Thrombocytosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Inclusion of butylated hydroxytoluene (BHT) in the diet of rats, at a dose level of 3 g/kg/day for up to 14 or 21 days, caused modest, but persistent, increases in platelet count, microcytic red blood cell count and red blood cell glutathione (up to 144%, 280% and 197% of control values respectively). These changes were directly BHT-related but unrelated to its hepatotoxicity and independent of vitamin K status. Transient increases in red blood cell count, haematocrit and haemoglobin and transient decreases in reticulocyte, white blood cell and neutrophil counts were, however, related to the early but temporary reduction in food and water intake in the initial stages of feeding the BHT-containing diet. The apparent microcytosis was not accompanied by any other evidence of haemolytic anaemia and may, therefore, have arisen as an artifactual consequence of platelet abnormalities. The cause of the increased platelet phenomenon is not yet characterised but may be an adaptive response to a BHT-related platelet dysfunction and does not appear to be life threatening since an 8-fold increase in mean platelet count has been observed without any detectable adverse effect on thrombogenesis. It is suggested that BHT, given in high doses, could prove to be a useful tool in the identification and characterisation of thrombopoietin.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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