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  • 1
    ISSN: 1435-1463
    Keywords: Hypoxia ; gangliosides ; dopamine ; striatum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Neonatal rats were injected with a mixture of bovine brain gangliosides (30 mg/kg body weight, s.c.) immediately before the exposure to hypoxia (pO2=10kPa, 10hrs daily) from the 2nd to the 11th day of life. At the age of 2–3 months the potential protective or restitutive effect of gangliosides on the radiolabelled dopamine release from striatal slices and on the conditioned avoidance learning was studied. No change in the content and the pattern of gangliosides of the rat striata was found after exposure to hypoxia and ganglioside administration, respectively. Both hypoxia exposure and ganglioside treatment of controls increased the dopamine release whereas hypoxic animals treated with gangliosides showed a diminished release. Hypoxia-induced impaired conditioned avoidance learning was improved by ganglioside treatment. The changed release of dopamine and the altered behavioural performance after ganglioside treatment alone indicate the necessity of a very cautious application of gangliosides to the developing brain.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 39 (1994), S. 2315-2319 
    ISSN: 1573-2568
    Keywords: d-lactic acid ; volatile fatty acids ; short bowel syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In patients with short bowel syndrome (SBS), the carbohydrate overload to the colon may disturb the normal pattern of colonic fermentation with production ofd-lactic acid and subsequent development of a metabolicd-lactic acidosis. We measuredd-lactic acid in blood, urine, and feces, as well as the composition of fecal water and fecal reducing substances from 11 patients with SBS, comparing the results with those from normal subjects. The fecal water from patients with SBS was characterized by low pH, potassium, and volatile fatty acids, high osmotic gap, and high concentration ofl- andd-lactic acid. Five of 11 had abnormal amounts of fecal reducing substances. Fecald-lactic acid was increased in nine of 11 patients. However, none of these patients showedd-lactic acid in urine, and only one had a very low concentration in plasma. These results show thatd-lactic acid was overproduced in the colon of most of the patients with SBS. However, other factors such as absorption or impairedd-lactic acid metabolism may be necessary for a plasmatic increase ofd-lactic acid.
    Type of Medium: Electronic Resource
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