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Zapytanie: D”HLER
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Tytuł oryginału: Influence of the corticotropin releasing hormone (CRH) on the brain-blood barrier permeability in cerebral ischemia in rats.
Autorzy: Hendryk S[tanisław], Jędrzejowska-Szypułka H., Jośko J., Jarząb B., D”hler K. D.
Źródło: J. Physiol. Pharmacol. 2002: 53 (1) s.85-94, il., tab., bibliogr. 36 poz.
Sygnatura GBL: 302,092

Hasła klasyfikacyjne GBL:
  • neurologia

    Typ dokumentu:
  • praca doświadczalna
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • zwierzęta
  • szczury
  • płeć męska

    Streszczenie angielskie: The increase in the blood-brain barrier (BBB) permeability and a developing cerebral oedema due to the ischemic infarction appear a few hours, and intensity during a few days, after closing the carotid arteries. It fails to be clear, however, what causes the increase in the microvessels damage, and whether the damage is a secondary result of the vasoactive substances released by the neurones and glia cells damaged by the ischemia. CRH, which plays an essential role in integrative the nervous, endocrine, and immunological systems, has a positive effect on the decrease in the permeability of the BBB damaged by various physical and chemical factors. Therefore, the examination of the CRH role in the cerebral ischemia may prove useful for explaining the processes taking place in the foci of the cerebral infarction and their environment. The experiment was carried out on rats which, 20 minutes before closing of both internal carotid arteries, was administered 10 ćg CRH to cerebrospinal fluid via cisterna magna of the brain. The BBB permeability was measured 30 minutes, 3 hours, 3 days, and 7 days after closing the arteries. The experiment has shown the CRH protective effect on the BBB and its consequent effect on the decrease in the BBB permeability which appeares in the 3 hours after closing the arteries (p 0.05), and is high significant during the chronic phase of the cerebral ischemia (p 0.03). It can be thus concluded that CRH, by affecting directly the endothelium of the cerebral vesels, decreases the endothelial damage in the acute phase of the ischemia. The decrease is noted to be more significant in the chronic phase of the ischemia...

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