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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Effects of some anxiogenic agents on rat brain monoamine oxidase (MAO) A and B inhibitory (tribulin) activity.

Anxiogenic agents, yohimbine, pentylenetetrazole (PTZ), quinine, bufotenine, flumazenil and isatin were administered (ip) to rats at doses known to induce anxiety in this species. All the drugs exhibited anxiogenic response on the elevated plus-maze and induced a parallel increase in endogenous brain monoamine oxidase (MAO) inhibitory (tribulin) activity. The intensity of the drug-induced anxiety was fairly well correlated with the magnitude of increase in the MAO A inhibitory component of tribulin but not so with its MAO B inhibitory component. Thus, in the doses used, the degree of anxiogenic activity was PTZ > yohimbine > bufotenine > quinine > isatin > flumazenil, in terms of % entries on the open arms of the maze, whereas the magnitude of endogenous MAO A inhibition was PTZ > yohimbine > bufotenine > quinine > flumazenil > isatin. The results indicate that the MAO A inhibitory component of tribulin, rather than its MAO B inhibitory component, may be responsible for the postulated function of tribulin as an endogenous marker of anxiety.[1]

References

  1. Effects of some anxiogenic agents on rat brain monoamine oxidase (MAO) A and B inhibitory (tribulin) activity. Bhattacharya, S.K., Chakrabarti, A., Sandler, M., Glover, V. Indian J. Exp. Biol. (1996) [Pubmed]
 
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