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2016 | 70 | 89–94
Article title

Cardiovascular effects of histamine H3 receptor antagonist JNJ 5207852 in haemorrhagic shock in rats

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Title variants
PL
Efekty sercowo-naczyniowe działania antagonisty receptorów histaminowych H3 JNJ 5207852 we wstrząsie krwotocznym u szczurów
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Abstracts
EN
INTRODUCTION: Histamine H3 receptors are widely distributed in the central and peripheral nervous system, including postganglionic adrenergic endings. They act mainly as presynaptic auto- and heteroceptors and are responsible for regulating the synthesis and release of histamine and other neurotransmitters/neuromodulators. The aim of the study was to examine the cardiovascular effects of the histamine H3 receptor blockade in the sympathoinhibitory phase of haemorrhagic shock. MATERIAL AND METHODS: Studies were carried out on male Wistar rats anaesthetized with ketamine/xylazine (100 mg/kg + 10 mg/kg, intraperitoneally), subjected to irreversible haemorrhagic shock (0% survival at 2 h) with a mean arterial pressure (MAP) of 20–25 mmHg. At 5 min of critical hypotension, the rats were injected intravenously with H3 receptor antagonist JNJ 5207852 or saline. RESULTS: Haemorrhage led to a decrease in pulse pressure (PP) and heart rate (HR). JNJ 5207852 (1 and 5 mg/kg) evoked long-lasting rises in MAP, PP and HR, with an improvement in survival at 2 h (5 mg/kg). Chemical sympathectomy with 6-hydroxydopamine (50 mg/kg for three consecutive days) inhibited cardiovascular changes evoked by JNJ 5207852 and decreased to 0% the survival rate at 2 h in rats treated with JNJ 5207852 (5 mg/kg). CONCLUSIONS: Histamine H3 receptor antagonist JNJ 5207852 induces the resuscitating effect in haemorrhage-shocked rats, and the mechanism responsible is associated with the activity of postganglionic sympathetic neurons.
PL
WSTĘP: Receptory histaminowe H3 występują w ośrodkowym i obwodowym układzie nerwowym, w tym na zakończeniach pozazwojowych układu współczulnego. Działają głównie jako presynaptyczne auto- i heteroreceptory, są odpowiedzialne za regulację syntezy oraz wydzielania histaminy i innych neurotransmiterów/neuromodulatorów. Celem pracy było zbadanie wpływu zablokowania receptorów H3 na czynność układu krążenia podczas fazy hamowania aktywności układu współczulnego w modelu wstrząsu krwotocznego u szczurów. MATERIAŁ I METODY: Badania przeprowadzono u szczurów samców szczepu Wistar, w znieczuleniu ogólnym przy użyciu ketaminy i ksylazyny (100 mg/kg + 10 mg/kg dootrzewnowo), u których wywołano nieodwracalny wstrząs krwotoczny ze średnim ciśnieniem tętniczym (MAP) 20-25 mmHg (wskaźnik przeżycia 2 h: 0%). W 5 min krytycznej hipotensji zwierzętom podawano dożylnie antagonistę receptorów H3 JNJ 5207852 bądź 0,9% roztwór NaCl. WYNIKI: Krwotok prowadził do obniżenia ciśnienia tętna (PP) i częstości rytmu serca (HR). JNJ 5207852 (1 i 5 mg/kg) wywoływał długotrwałe wzrosty MAP, PP i HR, a także zwiększenie do 100% wskaźnika przeżycia 2 h (5 mg/kg). Chemiczna sympatektomia wykonana przy użyciu 6-hydroksydopaminy (50 mg/kg przez trzy kolejne dni) hamowała zmiany MAP, PP i HR wywoływane przez JNJ 5207852 (5 mg/kg) i zmniejszała do 0% wskaźnik przeżycia 2 h. WNIOSKI: Antagonista receptorów histaminowych H3 JNJ 5207852 wywołuje efekt resuscytacyjny u szczurów we wstrząsie krwotocznym, a jego mechanizm działania związany jest z aktywnością pozazwojowych neuronów układu współczulnego.
Discipline
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Year
Volume
70
Pages
89–94
Physical description
Contributors
author
  • Katedra i Zakład Podstawowych Nauk Medycznych Wydziału Zdrowia Publicznego w Bytomiu Śląskiego Uniwersytetu Medycznego w Katowicach, ul. Piekarska 18, 41-902 Bytom, tel. +48 32 397 65 45, jjochem@poczta.onet.pl
author
  • Department of Basic Medical Sciences, School of Public Health in Bytom, Medical University of Silesia
  • Department of Basic Medical Sciences, School of Public Health in Bytom, Medical University of Silesia
author
  • Department of Basic Medical Sciences, School of Public Health in Bytom, Medical University of Silesia
  • Department of Basic Medical Sciences, School of Public Health in Bytom, Medical University of Silesia
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bwmeta1.element.psjd-1cdeb39c-e7ca-4d18-9a67-935021c0bd6c
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