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2012 | 66 | 2 | 13–19
Article title

Effect of chlorpheniramine and cimetidine, a histamine H1 and H2 antagonist on (3H)glucose uptake in the brain of adult rats lesioned with 5,7-dihydroxytryptamine as neonates

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PL
Wpływ chlorfeniraminy i cymetydyny, antagonistów receptorów histaminowych H1 i H2 na wychwyt (3H)glukozy w mózgu dorosłych szczurów po podaniu noworodkom 5,7-dihydroksytryptaminy
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EN
Abstracts
EN
BACKGROUND The aim of the study was to examine eff ect of chlorpheniramine (hista- mine H1 receptor antagonist) and cimetidine (histamine H2 receptor an- tagonist) on (3H)glucose uptake in the brain of adult rats lesioned with 5,7-dihydroxytryptamine (neurotoxin for the central serotoninergic sys- tem) as neonates. MATERIAL AND METHODS Male 3-days old Wistar rats were injected with serotoninergic neurons neurotoxin 5,7-dihydroxytryptamine, 75 μg icv. Control rats were injected with saline 10 μg icv. At 8 weeks level of 5-HT and 5-HIAA was estimat- ed in the striatum, frontal cortex and hippocampus of the brain. Other 8 weeks old animals of control and 5,7-DHT lesioned as neonates were injected with S(+)chlorpheniramine (H1 receptor antagonist) 10.0 mg/kg ip or with cimetidine (H2 receptor antagonist) 5.0 mg/kg ip. Control rats were injected with saline 1.0 ml/kg ip. 60 minutes later 6-(3H)-D-glucose was applied in a dose of 500 μCi/kg ip and 15 minutes later all rats were decapitated and their brains were excised, placed on the ice and sample of frontal cortex, striatum, hippocampus, thalamus with hypothalamus, pons and cerebellum were separated and weighted. Then in the examined tissues radioactivity was measured in liquid scintillation counter and ex- pressed in DPM/100 mg of wet tissue. RESULTS 5,7-DHT decreased signifi cantly the level of 5-HT and 5-HIAA in all examined tissues in the brain of adult rats. In rats neonatally lesioned with 5,7-DHT radioactivity signifi cantly increased as compare to the control. Chlorpheniramine prevent signifi cantly that eff ect in the frontal cortex and cimetidine in the frontal cortex, hippocampus and cerebellum. CONCLUSION From above we conclude that in the brain of mammalians the metabolic link between histaminergic and serotoninergic system exist in regulation of energetic prcesses connected with glucose metabolism.
PL
WSTĘP Celem pracy było zbadanie wpływu chlorfeniraminy, antagonisty receptora histaminowego H1 i cymetydyny, antagonisty receptora histaminowego H2 na wychwyt (3H)glukozy w mózgu dorosłych szczurów z lezją (zniszczenie) ośrodkowego układu serotoninergicznego wywołaną podaniem noworodkom neurotoksyny 5,7-dihydroksytryptaminy. MATERIAŁ I METODY Trzydniowe noworodki płci męskiej szczepu Wistar otrzymały do bocznej komory mózgu (icv) 75 μg 5,7-dihydroksytryptaminy (5,7-DHT), neurotoksynę układu serotoninergicznego. Zwierzęta kontrolne otrzymały icv 10 μl 0,9% roztworu NaCl. Po osiągnięciu 8 tygodni życia zwierzęta dekapitowano i w korze czołowej, prążkowiu oraz zakręcie hipokampa oznaczono zawartość 5-HT i 5-HIAA metodą HPLC/ED. Osobnej grupie badanej i kontrolnej podano S(+)chlorfeniraminę 10,0 mg/kg ip (antagonista receptora histaminowego H1) lub cymetydynę 5,0 mg/kg ip (antagonista receptora histaminowego H2). Zwierzęta kontrolne obu grup otrzymały 0,9% roztwór NaCl 1,0 ml/kg ip. Po 60 minutach wszystkie szczury otrzymały 6-(3H)-D-glukozę 500 μCi/kg ip. Po dalszych 15 minutach zwierzęta dekapitowano, wyjmowano z czaszki mózg, separowano z niego korę czołową, prążkowie, hipokamp, wzgórze z podwzgórzem, most i móżdżek, w których oznaczono radioaktywność przy użyciu licznika scyntylacyjnego. Wyniki wyrażono w DPM (Desintegrations Per Minute) na 100 mg świeżej tkanki. WYNIKI 5,7-DHT podany noworodkom znamiennie obniżył zawartość 5-HT i 5-HIAA w badanych fragmentach mózgu dorosłych szczurów. U zwierząt z lezją ośrodkowego układu serotoninergicznego we wszystkich badanych częściach mózgu wykazano znamienny wzrost wychwytu (3H)glukozy. Badani antagoniści receptorów histaminowych nie wpływali na wychwyt (3H)glukozy w mózgu zwierząt grupy kontrolnej, natomiast chlorfeniramina zapobiegała wychwytowi glukozy tylko w korze mózgowej, a cymetydyna w korze mózgowej, hipokampie i móżdżku zwierząt z lezją ośrodkowego układu serotoninergicznego wywołaną podaniem noworodkom 5,7-DHT. WNIOSKI Wyniki wskazują na metaboliczne powiązania w mózgu ssaków między układem serotoninergicznym i histaminergicznym.
Discipline
Publisher

Year
Volume
66
Issue
2
Pages
13–19
Physical description
Contributors
  • Chair and Department of Medicine and Environmental Epidemiology School of Medicine with the Division of Dentistry in Zabrze Medical University of Silesia in Katowice ul. Jordana 19 41-808 Zabrze, Poland tel./fax 32 27 22 847, jjosko@sum.edu.pl
author
  • Chair and Department of Medicine and Environmental Epidemiology
  • Department of Pharmacology
  • Department of Pharmacology
  • Department of Histology and Embriology School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia in Katowice
author
  • Department of Pharmacology
  • Department of Histology and Embriology School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia in Katowice
author
  • Department of Histology and Embriology School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia in Katowice
author
  • Department of Pharmacology, High School of Strategic Planning in Dąbrowa Górnicza
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bwmeta1.element.psjd-6f6cc20c-109e-46ed-a090-1125be76c827
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