title: Period shift induction by intermittent stimulation in a Drosophila model of PER protein oscillations.
abstract: PER protein circadian oscillations in Drosophila have been described by Goldbeter according to a five-dimensional model that includes the possibility of genetic mutation described by changing one parameter, the maximum degradation rate of the PER protein. Assuming that, in a mutant Drosophila this parameter is unreachable, we modify another parameter, the translation rate between the mRNA and the nonphosphorylated form of PER protein, by periodic intermittent activation or inhibition. We show how such a modification, simulated in the model by a periodic, on/off, piecewise constant stimulation (which increases or decreases this parameter) allows the entrainment of oscillations exactly at, or close to, a desired period. In a different context, this suggests that some diseases may be corrected using pharmacological agents according to specific periodic delivery schedules.
authors.affiliation: Université Paris XI and INRIA Rocquencourt, Le Chesnay, France. Daniel.Claude@inria.fr
authors.forename: D
authors.initials: D
authors.lastname: Claude
authors.forename: J
authors.initials: J
authors.lastname: Clairambault
mesh_terms: D000818:Animals; D002940:Circadian Rhythm / Q000235:genetics / Q000502:physiology*; D004330:Drosophila / Q000235:genetics / Q000378:metabolism*; D029721:Drosophila Proteins; D019476:Insect Proteins / Q000235:genetics / Q000378:metabolism*; D008954:Models, Biological; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D056950:Period Circadian Proteins; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
chemical_list: D029721:Drosophila Proteins; D019476:Insect Proteins; D009687:Nuclear Proteins; C539040:PER protein, Drosophila; D056950:Period Circadian Proteins; D012333:RNA, Messenger