Anti-analgesic and anti-amnesic effect of complement C3a |
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Authors: | Jinsmaa Y Takahashi M Takahashi M Yoshikawa M |
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Institution: | Research Institute for Food Science, Kyoto University, Uji, Japan. |
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Abstract: | In the present study, we found that complement C3a exerted central effects after intracerebroventricular administration in mice. At doses of 3 and 10 pmol/mouse, the peptide showed an antagonistic effect on analgesia induced by morphine and U-50488H, known to be mu- and kappa-opioid receptor agonists, respectively. Moreover, complement C3a improved scopolamine- and ischemia-induced amnesia at a dose of 10 pmol/mouse. Anti-analgesia was not observed by C3a des-Arg at 10 pmol/mouse. The present findings suggest that complement C3a may act as a peptide with anti-opioid activity in the central nervous system. |
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