R. Levi

Publications228
h-index51
Citations12,314
Highly Influential Citations247
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International Union of Pharmacology. XIII. Classification of histamine receptors.
The classification of histamine receptors has to date been based on rigorous classical pharmacological analysis, and as yet, the classification of the three histamine receptors that have been defined… Expand
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Nitric oxide synthase in macula densa regulates glomerular capillary pressure.
Tubular-fluid reabsorption by specialized cells of the nephron at the junction of the ascending limb of the loop of Henle and the distal convoluted tubule, termed the macula densa, releases compounds… Expand
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Nitric Oxide-stimulated Guanine Nucleotide Exchange on p21ras(*)
The protooncogene p21ras, a monomeric G protein family member, plays a critical role in converting extracellular signals into intracellular biochemical events. Here, we report that nitric oxide (NO)… Expand
  • 349
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Identification of arginine as a precursor of endothelium-derived relaxing factor.
Nitric oxide (NO) is a major endothelium-derived relaxing factor (EDRF) released in response to vasodilating amines, peptides, proteins, ionophores, and nucleotides. EDRF is an important regulator of… Expand
  • 393
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Activated murine macrophages secrete a metabolite of arginine with the bioactivity of endothelium-derived relaxing factor and the chemical reactivity of nitric oxide
L-arginine-dependent synthesis of nitrite (NO2-) and nitrate (NO3-) by macrophages correlates with and is required for their execution of nonspecific cytotoxicity toward some tumor cells and… Expand
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NG-methyl-L-arginine, an inhibitor of L-arginine-derived nitric oxide synthesis, stimulates renal sympathetic nerve activity in vivo. A role for nitric oxide in the central regulation of sympathetic…
Continuous production of endothelium-derived nitric oxide (NO) in peripheral vessels has been shown to modulate vascular resistance and blood pressure. NO is also formed in the brain upon activation… Expand
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Histamine and cardiac arrhythmias.
Modification of the cardiac rhythm by histamine has been appreciated almost since the compound's isolation from ergot by Barger and Dale in 1910. The major arrhythmogenic actions of histamine are an… Expand
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Cardiac mast cell-derived renin promotes local angiotensin formation, norepinephrine release, and arrhythmias in ischemia/reperfusion.
Having identified renin in cardiac mast cells, we assessed whether its release leads to cardiac dysfunction. In Langendorff-perfused guinea pig hearts, mast cell degranulation with compound 48/80… Expand
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Role of CD39 (NTPDase-1) in thromboregulation, cerebroprotection, and cardioprotection.
Blood platelets maintain vascular integrity and promote primary and secondary hemostasis following interruption of vessel continuity. Biochemical or physical damage to coronary, carotid, or… Expand
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Reversal of endotoxin-mediated shock by NG-methyl-L-arginine, an inhibitor of nitric oxide synthesis.
Septic shock is a life-threatening condition that results from exposure to bacterial endotoxin. It is manifested by cardiovascular collapse and mediated by the release of cytokines such as tumor… Expand
  • 557
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