Article (Scientific journals)
Rapid regulation of pain by estrogens synthesized in spinal dorsal horn neurons
Evrard, H. C.; Balthazart, Jacques
2004In Journal of Neuroscience, 24 (33), p. 7225-7229
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Keywords :
aromatase inhibitor; estrogens; rapid effects; nongenomic effects; membrane estrogen receptor; bird
Abstract :
[en] In addition to exerting genomic actions via nuclear receptors within hours to days, estrogens also regulate neuronal activity much faster (within seconds) by activating neuronal membrane receptors coupled to intracellular second-messenger pathways. To date, the origin of estrogens inducing rapid effects in the brain remains unclear, although it is often ascribed to the gonads. We report here that an acute blockade of the endogenous synthesis of estrogens in the quail spinal dorsal horn markedly reduced, within 1 min, the behavioral responsiveness to a thermal painful stimulus. Similar rapid effects in the opposite direction were induced by estradiol. This finding identifies a new paracrine and nongenomic mechanism for the regulation of pain by estrogens. Such regulation was assumed previously to result only from slow genomic actions of estrogens arising from the ovaries. Also, quite importantly, this finding suggests that the numerous rapid nongenomic effects of estrogens in the CNS could depend on their immediate local production by the enzyme aromatase, independently from the gonads.
Disciplines :
Neurosciences & behavior
Author, co-author :
Evrard, H. C.
Balthazart, Jacques  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biologie de la différenciation sexuelle du cerveau
Language :
English
Title :
Rapid regulation of pain by estrogens synthesized in spinal dorsal horn neurons
Publication date :
18 August 2004
Journal title :
Journal of Neuroscience
ISSN :
0270-6474
eISSN :
1529-2401
Publisher :
Soc Neuroscience, Washington, United States - Washington
Volume :
24
Issue :
33
Pages :
7225-7229
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 April 2009

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