Abstract：
:1. The present study was aimed to determine whether propranolol improves contractile function of the ischaemic/reperfused heart through protection of the mitochondrial function during ischaemia. 2. Isolated perfused rat hearts were subjected to 35-min ischaemia followed by 60-min reperfusion. Pre-treatment with propranolol at the concentrations of 10 to 100 microM for the final 3 min of pre-ischaemia resulted in the improvement of ischaemia/reperfusion-induced contractile dysfunction, release of creatine kinase (CK) into perfusate, and decrease in myocardial high-energy phosphates. Propranolol also attenuated ischaemia-induced accumulation in Na+, suggesting that cytosolic sodium overload during ischaemia was prevented by propranolol. 3. The mitochondrial oxygen consumption rate of skinned bundles from the perfused heart decreased at the end of ischaemia and it further decreased at the end of reperfusion. These decreases were cancelled by treatment with propranolol. A release of cytochrome c from the perfused heart was observed during ischaemia, and this release was suppressed by treatment with propranolol. 4. To elucidate the direct effect of propranolol on mitochondria, the mitochondria were isolated from normal hearts and their activities were determined in the presence of various concentrations of Na+ and propranolol. The addition of sodium lactate, which mimicked sodium overload in the ischaemic heart, reduced the state 3 respiration, whereas this reduction was not attenuated by the presence of propranolol. 5. These results suggest that cardioprotection of propranolol may be exerted via attenuating Na+ influx into cardiac cells followed by prevention of the mitochondrial dysfunction in the ischaemic heart, leading to improvement of energy production of the heart during reperfusion.
journal_name
Br J Pharmacoljournal_title
British journal of pharmacologyauthors
Iwai T,Tanonaka K,Kasahara S,Inoue R,Takeo Sdoi
10.1038/sj.bjp.0704724subject
Has Abstractpub_date
2002-06-01 00:00:00pages
472-80issue
3eissn
0007-1188issn
1476-5381journal_volume
136pub_type
杂志文章abstract：:1. To characterize the muscarinic receptors on human pulmonary veins associated with the acetylcholine (ACh)-induced relaxation, isolated venous and arterial preparations were pre-contracted with noradrenaline (10 microM) and were subsequently challenged with ACh in the absence or presence of selective muscarinic anta...
journal_title：British journal of pharmacology
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doi：10.1038/sj.bjp.0703301
更新日期：2000-05-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1989.tb12668.x
更新日期：1989-12-01 00:00:00
abstract：:1 The concentrations of p- and m-tyramine were measured in the caudate nucleus of the rat brain following subcutaneous injection of reserpine or intraventricular injection of 6-hydroxydopamine, beta-Phenylethylamine was analysed in the hypothalamus after reserpine. 2 Endogenous levels of p-tyramine and m-tyramine in t...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1977.tb06996.x
更新日期：1977-01-01 00:00:00
abstract：:The effects of several anticonvulsant drugs on sodium-dependent high affinity choline uptake (HACU) in mouse hippocampal synaptosomes was investigated. HACU was measured in vitro after in vivo administration of the drug to mice. HACU was inhibited by drugs which have in common the ability to facilitate gamma-aminobuty...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/bph.12500
更新日期：2014-03-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1977.tb09738.x
更新日期：1977-09-01 00:00:00
abstract：:1. The effect of the myorelaxant drugs baclofen, diazepam and tizanidine have been compared on in vitro preparations of baby rat spinal cord and adult rat superior cervical ganglion. 2. Dorsal root-elicited long duration (time to half decay 9.71 +/- 0.29 s.e. mean, n = 31) ipsilateral ventral root reflexes (DR-VRP), m...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1992.tb12794.x
更新日期：1992-10-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1038/sj.bjp.0701914
更新日期：1998-07-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1968.tb07957.x
更新日期：1968-09-01 00:00:00
abstract：:To establish that bradykinin is formed in the heart we measured bradykinin in the venous effluent from rat isolated hearts perfused with Krebs-Henseleit buffer. In addition, we examined the effect on bradykinin outflow of the angiotensin converting enzyme (ACE) inhibitor, ramiprilat. From rat isolated normoxic hearts ...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1993.tb12797.x
更新日期：1993-02-01 00:00:00
abstract：:1. In order to assess the role of different ionic currents in hypoxia-induced action potential shortening, we investigated the effects of blockers of voltage-dependent and ATP-sensitive K(+)-channel on the membrane potential of hypoxic rabbit hearts and papillary muscles. The response to blocking of the inward rectifi...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1992.tb14436.x
更新日期：1992-08-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.2009.00387.x
更新日期：2009-11-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1038/sj.bjp.0704023
更新日期：2001-04-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1978.tb07798.x
更新日期：1978-07-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1990.tb15860.x
更新日期：1990-07-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1038/sj.bjp.0701575
更新日期：1998-01-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1994.tb13121.x
更新日期：1994-06-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1993.tb12869.x
更新日期：1993-03-01 00:00:00
abstract：:1. The novel bradykinin antagonist, HOE 140, completely blocked the fall in rabbit blood pressure caused, not only by i.v. bradykinin, but also by i.v. kallikrein. This shows that both the effects of exogenously administered bradykinin and those of endogenously released kinins are antagonized by HOE 140. 2. Acute panc...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1992.tb12751.x
更新日期：1992-10-01 00:00:00
abstract：:1 Very highly purified (greater than 100,000 u/mg) slow reacting substance of anaphylaxis (SRS-A) has been prepared by reversed phase high pressure liquid chromatographic (HPLC) techniques. 2 High resolution liquid chromatography suggests that SRS-A may exist in at least three distinct forms which are possible tautome...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1980.tb10696.x
更新日期：1980-01-01 00:00:00
abstract：:1. The effects of cromakalim (BRL 34915) on the smooth muscle cells of guinea-pig mesenteric artery and vein were investigated with microelectrode and tension recording methods. 2. Cromakalim (greater than 10 microM) produced membrane hyperpolarization with an increase in ionic conductance. The hyperpolarization occur...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1988.tb11707.x
更新日期：1988-11-01 00:00:00
abstract：:1. This study compares a cyclo-oxygenase inhibitor (aspirin), a 5-HT2 antagonist (ZM170809) and a combined thromboxane synthase inhibitor/receptor antagonist (ZD1542) as adjuncts to tissue plasminogen activator (rt-PA). 2. Application of an anodal current (332 +/- 4.1 microA) to the stenosed left circumflex coronary a...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1994.tb13063.x
更新日期：1994-05-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1038/sj.bjp.0704122
更新日期：2001-06-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1038/sj.bjp.0702672
更新日期：1999-07-01 00:00:00
abstract：BACKGROUND AND PURPOSE:Next to its broad antimicrobial spectrum, the therapeutic advantages of the fluoroquinolone antimicrobial drug Danofloxacin-Mesylate (DM) are attributed to its rapid distribution to the major target tissues such as lungs, intestines and the mammary gland in animals. Previous analyses revealed tha...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1038/sj.bjp.0706974
更新日期：2007-02-01 00:00:00
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journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1973.tb08358.x
更新日期：1973-07-01 00:00:00
abstract：:The effects of high (20 mM) concentrations of caffeine were studied on the transmembrane voltage and currents in rat single ventricular myocytes by the whole cell configuration of the patch clamp technique. Rapid application of caffeine released Ca2+ from the sarcoplasmic reticulum and induced a Ni(2+)-sensitive trans...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1993.tb13702.x
更新日期：1993-08-01 00:00:00
abstract：:1. In the zymosan rat air pouch model of inflammation we have assessed the time dependence of phospholipase A2 (PLA2) accumulation in the inflammatory exudates as well as cell migration, myeloperoxidase activity, prostaglandin E2 (PGE2) and leukotriene B4 (LTB4) levels. 2. A significant increase in PLA2 activity was d...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1996.tb15353.x
更新日期：1996-04-01 00:00:00
abstract：:1. Intravenous administration of leukotriene C4 (LTC4) and LTD4 (1-10 nmol kg-1) caused a dose-dependent increase in secretion of glandular-kallikrein in the bronchial washings of guinea-pigs, as measured by cleavage of a synthetic substrate and the formation of kinin. LTC4 was more potent than LTD4 and pilocarpine wa...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1992.tb09031.x
更新日期：1992-03-01 00:00:00
abstract：:1. A series of analogues of angiotensin II (AT(II)) has been used in the present experiments to characterize receptors for AT(II) in intestinal (rat stomach strip, rat colon) and vascular (rabbit aorta) smooth muscles. Two types of compounds have been chosen: (a) agonists with reduced potency, in which 4-Tyr, 6-His or...
journal_title：British journal of pharmacology
pub_type： 杂志文章
doi：10.1111/j.1476-5381.1973.tb06915.x
更新日期：1973-06-01 00:00:00
