L-Cysteinesulfinic acid modulates cardiovascular function in the periaqueductal gray area of rat.
L-Cysteinesulfinic acid (CSA) involvement in modulating periaqueductal gray (PAG) pressor neurons has been evaluated in the rat. Intra-PAG CSA induced an increase in mean blood pressure partially antagonized by (2S)-alpha-ethylglutamic acid (EGA), a group II metabotropic glutamate receptors (mGluRs) antagonist. Conversely, the NMDA antagonist, DL-AP5, or the mGluRs antagonists, (+)-MCPG, UPF523, or (RS)-alpha-methylserine-O-phosphate (MSOP), were devoid of any activity on the CSA effect. These data show that the excitatory amino acid CSA, probably by stimulating an mGluR, contributes with glutamate in modulating cardiovascular function at the PAG matter.
Institute of Pharmacology and Toxicology, Faculty of Medicine and Surgery, II University of Naples, Italy.
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Maione
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Leyva
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Palazzo
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Stella
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Rossi
D000818:Animals; D001794:Blood Pressure / Q000187:drug effects*; D003545:Cysteine / Q000031:analogs & derivatives* / Q000494:pharmacology; D004347:Drug Interactions; D018690:Excitatory Amino Acid Agonists / Q000494:pharmacology; D018691:Excitatory Amino Acid Antagonists / Q000494:pharmacology; D006321:Heart / Q000187:drug effects; D008297:Male; D008845:Microinjections; D018377:Neurotransmitter Agents / Q000494:pharmacology*; D010487:Periaqueductal Gray / Q000187:drug effects* / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley
D018690:Excitatory Amino Acid Agonists; D018691:Excitatory Amino Acid Antagonists; D018377:Neurotransmitter Agents; D003545:Cysteine; C013461:cysteine sulfinic acid