Effect of some centrally administered putative amino acid neurotransmitters on carrageenan-induced paw oedema in rats

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Abstract
The possible modulatory effect of central amino acid neurotransmitters on carrageenan-induced paw inflammation has been investigated in rats. Eight putative amino acid neurotransmitters were administered intracerebroventricularly and their effect on the peripheral inflammation was noted. The inhibitory amino acid transmitters, GABA, glycine and taurine attenuated the peripheral oedema, while the excitatory amino acid transmitters, glutamic acid and aspartic acid had a pro-inflammatory effect. However, the other putative amino acid neurotransmitters, proline and alanine (inhibitory) and cysteic acid (excitatory) did not affect carrageenan-induced oedema.