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

ODC-polyamine system is involved in morphine analgesia.

alpha-Difluoromethylornithine (DFMO) directly infused into a brain-lateral ventricle (12.5, 25 and 50 micrograms/rat) dose- and time-dependently inhibited brain ODC activity. While having no influence per se on pain threshold, DFMO significantly inhibited the analgesic activity of morphine (15 mg/kg i.p.), this effect being obtained when brain ODC activity was reduced by at least 80%. On the other hand, DFMO had no influence on number and affinity of brain opiate binding sites. Morphine per se neither modified whole brain ODC activity nor significantly affected the ODC inhibitory effect of DFMO. In more discrete brain areas (midbrain, brainstem) morphine actually increased ODC activity. The present results indicate that brain ODC/polyamines system may play a role in the analgesic activity of opioids, probably at a post-receptorial level or through a non-opiate receptor-linked mechanism.[1]

References

  1. ODC-polyamine system is involved in morphine analgesia. Genedani, S., Bernardi, M., Tagliavini, S., Bertolini, A. Life Sci. (1989) [Pubmed]
 
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