Naslov
Circadian modulation of dopamine receptor responsiveness in Drosophila melanogaster

Autori
Andretic, Rozi ; Hirsh, J.

Izvornik
Proceedings of the National Academy of Sciences of the United States of America (0027-8424) 97 (2000), 4; 1873-1878

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
period clock gene ; biogenic-amines ; nervous-system ; decapitated Drosophila ; immunoreactive neurons ; callinectes-sapidus ; malpighian tubules ; molecular analysis ; mosaic analysis ; messenger-RNA

Sažetak
We investigated the circadian function of Drosophila dopamine receptors by using a behaviorally active decapitated preparation that allows for direct application of drugs to the nerve cord. Quinpirole, a D2-like dopamine receptor agonist, induces reflexive locomotion in decapitated flies. We show that the amount of locomotion induced changes as a function of the time of day, with the highest responsiveness to quinpirole during the subjective night. Furthermore, dopamine receptor responsiveness is under circadian control and depends on the normal function of the period gene. The head pacemaker is at least partly dispensable for the circadian modulation of quinpirole-induced locomotion, because changes in agonist responsiveness persist in decapitated flies that are aged for 12 h, This finding suggests a role for the period- dependent molecular oscillators in the body in the modulation of amine receptor responsiveness.

Izvorni jezik
Engleski

POVEZANOST RADA