We are analyzing https://link.springer.com/article/10.1007/bf00966863.

Title:
Possible role of cGMP in excitatory amino acid induced cytotoxicity in cultured cerebral cortical neurons | Neurochemical Research
Description:
Using cultured cerebral cortical neurons at mature stages (9 days in culture, d.i.c.) it was demonstrated that glutamate, NMDA (N-methyl-D-aspartate) and to a lesser extent KA (kainate) increase the intracellular cGMP concentration ([cGMP]i) whereas no such effect was observed after exposure of the cells of QA (quisqualate) and AMPA (2-amino-3-(3-hydroxy-5-methylisoxazol-4-yl)propionate). No effect of glutamate, NMDA and KA was observed in immature neurons (2 d.i.c.). The pharmacology of these cGMP responses was investigated using the glutamate antagonists APV (2-amino-5-phosphonovalerate) with selectivity for NMDA receptors, CNQX (6-cyano-7-nitro-quinoxaline-2,3-dione) with selectivity for non-NMDA receptors and the novel KA selective antagonists AMOA (2-amino-3-[3-(carboxymethoxy)-5-methylisoxazol-4-yl]propionate) and AMNH (2-amino-3-[2-(3-hydroxy-5-methylisoxazol-4-yl)methyl-5-methyl-3-oxoisoxazolin-4-yl]propionate). In addition, the cytotoxicity of glutamate, NMDA and KA was studied and found to be enhanced by addition of the non-metabolizable cGMP analogue 8-Br-cGMP. On the contrary, the toxicity of QA and AMPA was not affected by 8-Br-cGMP. Pertussis toxin augmented the toxicity elicited by glutamate, NMDA, KA and QA but not that induced by AMPA. On the other hand, only glutamate and KA induced toxicity was potentiated by cholera toxin, which also enhanced the stimulatory effect of glutamate and NMDA but not that of KA on the cellular cGMP content. The toxicity as well as the effects on intracellular cGMP levels could be antagonized by the specific excitatory amino acid (EAA) antagonists. These results suggest that the mechanisms by which the various excitatory amino acids exert cytotoxicity are different, and that increased cGMP levels may participate in the mediation of glutamate, NMDA or KA induced toxicity but less likely in QA and AMPA mediated toxicity. Furthermore, G-proteins or other pertussis or cholera toxin sensitive entities seem to be involved in the cytotoxic action of all excitatory amino acids except AMPA.
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Keywords {🔍}

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Topics {✒️}

n-methyl-d-aspartate receptor n-methyl-d-aspartate methyl-5-methyl-3-oxoisoxazolin-4-yl]propionate pertussis toxin augmented endothelium-derived relaxing factor cholera toxin month download article/chapter excitatory amino acids kainic acid neurotoxicity amino acid antagonists guanine nucleotide-binding protein gaba metabolising enzymes amino acid-induced distinct gtp-binding proteins hypoxic-ischemic brain damage neurotransmitter amino acids chemotactic peptide-stimulated formation cell signalling g-proteins g-protein activation glutamate antagonists apv increased cgmp levels check access related subjects instant access glutamate neurotoxicity full article pdf cultured cerebellar neurons receptor-generated signals gtp-binding proteins mouse cortical neurons privacy choices/manage cookies martinus nijhoff publishing rat cortical neurons glutamate receptor activation kainate receptor linked receptor-effector coupling cerebellar granule cells differentiated human leukemic cyclic gmp accumulation dibutyryl cyclic gmp psychotomimetic-induced hyperactivity cyclic gmp responses ca2+-mediated glutamate-induced45ca+ uptake cyclic gmp synthesis 3-hydroxy-5-methylisoxazol-4-yl 5-methylisoxazol-4-yl]propionate cerebral guanylate cyclase distinct pharmacological profile

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         headline:Possible role of cGMP in excitatory amino acid induced cytotoxicity in cultured cerebral cortical neurons
         description:Using cultured cerebral cortical neurons at mature stages (9 days in culture, d.i.c.) it was demonstrated that glutamate, NMDA (N-methyl-D-aspartate) and to a lesser extent KA (kainate) increase the intracellular cGMP concentration ([cGMP]i) whereas no such effect was observed after exposure of the cells of QA (quisqualate) and AMPA (2-amino-3-(3-hydroxy-5-methylisoxazol-4-yl)propionate). No effect of glutamate, NMDA and KA was observed in immature neurons (2 d.i.c.). The pharmacology of these cGMP responses was investigated using the glutamate antagonists APV (2-amino-5-phosphonovalerate) with selectivity for NMDA receptors, CNQX (6-cyano-7-nitro-quinoxaline-2,3-dione) with selectivity for non-NMDA receptors and the novel KA selective antagonists AMOA (2-amino-3-[3-(carboxymethoxy)-5-methylisoxazol-4-yl]propionate) and AMNH (2-amino-3-[2-(3-hydroxy-5-methylisoxazol-4-yl)methyl-5-methyl-3-oxoisoxazolin-4-yl]propionate). In addition, the cytotoxicity of glutamate, NMDA and KA was studied and found to be enhanced by addition of the non-metabolizable cGMP analogue 8-Br-cGMP. On the contrary, the toxicity of QA and AMPA was not affected by 8-Br-cGMP. Pertussis toxin augmented the toxicity elicited by glutamate, NMDA, KA and QA but not that induced by AMPA. On the other hand, only glutamate and KA induced toxicity was potentiated by cholera toxin, which also enhanced the stimulatory effect of glutamate and NMDA but not that of KA on the cellular cGMP content. The toxicity as well as the effects on intracellular cGMP levels could be antagonized by the specific excitatory amino acid (EAA) antagonists. These results suggest that the mechanisms by which the various excitatory amino acids exert cytotoxicity are different, and that increased cGMP levels may participate in the mediation of glutamate, NMDA or KA induced toxicity but less likely in QA and AMPA mediated toxicity. Furthermore, G-proteins or other pertussis or cholera toxin sensitive entities seem to be involved in the cytotoxic action of all excitatory amino acids except AMPA.
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      headline:Possible role of cGMP in excitatory amino acid induced cytotoxicity in cultured cerebral cortical neurons
      description:Using cultured cerebral cortical neurons at mature stages (9 days in culture, d.i.c.) it was demonstrated that glutamate, NMDA (N-methyl-D-aspartate) and to a lesser extent KA (kainate) increase the intracellular cGMP concentration ([cGMP]i) whereas no such effect was observed after exposure of the cells of QA (quisqualate) and AMPA (2-amino-3-(3-hydroxy-5-methylisoxazol-4-yl)propionate). No effect of glutamate, NMDA and KA was observed in immature neurons (2 d.i.c.). The pharmacology of these cGMP responses was investigated using the glutamate antagonists APV (2-amino-5-phosphonovalerate) with selectivity for NMDA receptors, CNQX (6-cyano-7-nitro-quinoxaline-2,3-dione) with selectivity for non-NMDA receptors and the novel KA selective antagonists AMOA (2-amino-3-[3-(carboxymethoxy)-5-methylisoxazol-4-yl]propionate) and AMNH (2-amino-3-[2-(3-hydroxy-5-methylisoxazol-4-yl)methyl-5-methyl-3-oxoisoxazolin-4-yl]propionate). In addition, the cytotoxicity of glutamate, NMDA and KA was studied and found to be enhanced by addition of the non-metabolizable cGMP analogue 8-Br-cGMP. On the contrary, the toxicity of QA and AMPA was not affected by 8-Br-cGMP. Pertussis toxin augmented the toxicity elicited by glutamate, NMDA, KA and QA but not that induced by AMPA. On the other hand, only glutamate and KA induced toxicity was potentiated by cholera toxin, which also enhanced the stimulatory effect of glutamate and NMDA but not that of KA on the cellular cGMP content. The toxicity as well as the effects on intracellular cGMP levels could be antagonized by the specific excitatory amino acid (EAA) antagonists. These results suggest that the mechanisms by which the various excitatory amino acids exert cytotoxicity are different, and that increased cGMP levels may participate in the mediation of glutamate, NMDA or KA induced toxicity but less likely in QA and AMPA mediated toxicity. Furthermore, G-proteins or other pertussis or cholera toxin sensitive entities seem to be involved in the cytotoxic action of all excitatory amino acids except AMPA.
      datePublished:
      dateModified:
      pageStart:35
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         Neurons
         cGMP
         neurotoxicity
         G-proteins
         excitatory amino acids
         excitatory amino acid antagonists
         cholera toxin
         pertussis toxin
         Neurosciences
         Neurochemistry
         Biochemistry
         general
         Cell Biology
         Neurology
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