(CHEN,JI) Primaryciliaarethe?cellularantennae?thatdetectvariousextracellularsignalsincludinghormones.Defectsin primaryciliacauseabroadspectrumofhumandiseasesincludingobesity.Thetype3adenylylcyclase(AC3) isthemajoradenylylcyclaseandakeyenzymemediatingthecAMPsignalpathwayinolfactorysensorycilia andinprimaryciliathroughoutthecentralnervoussystem(CNS).AC3inolfactorysensoryciliaisessentialfor theolfactorysignaltransductionandlossofAC3leadstoanosmia(lossofsmell).Moreover,multiplegenetic evidencehasdemonstratedthatdefectsinAC3areassociatedwithobesityanddepression.Nevertheless,the functionalmechanismsofAC3,andthesignalingtransductionpathwayinprimaryciliaintheCNSremaintobe elucidated.Becauseolfactorysensoryciliaandneuronalprimaryciliaarestructurallyrelatedandsharea commonintraflagellarproteintransportsystem,wehypothesizethatthecAMPsignalingintheprimaryciliaof CNSneuronsresemblesthatinolfactorysensoryciliaandalterationofthissignalinginneuronalprimarycilia impactsobesityanddepression.Totestthishypothesis,wewillfirstusefluorescentnanoparticlesinco- immnunostainingexperimentsandtakeamassspectrometrybasedproteomicapproachtoidentifysignal proteinsthattransducethecAMPsignalingintheprimaryciliaofCNSneurons.Wewillnextgenetically engineeralight-activatedadenylylcyclaseintoprimaryciliatoenableoptogeneticmanipulationofcAMPlevel inneuronalprimarycilia.WewillalsodeterminehowcAMPinneuronalprimaryciliamodulateneuronal functions.Inaddition,wewillfurtheridentifywhichneuronalensembleswithlossofAC3leadstoobesityand depressionusingtissue-specificAC3knockoutmice.Completionofthisprojectwillidentifymolecular componentsthatmediateciliarycAMPsignaltransduction,generateusefultoolsforciliumresearch,and providenovelinsightsintothe(patho-)physiologicalrolesofAC3inobesityanddepression.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Exploratory Grants (P20)
Project #
5P20GM113131-04
Application #
9937770
Study Section
Special Emphasis Panel (ZGM1)
Project Start
Project End
Budget Start
2020-06-01
Budget End
2021-05-31
Support Year
4
Fiscal Year
2020
Total Cost
Indirect Cost
Name
University of New Hampshire
Department
Type
DUNS #
111089470
City
Durham
State
NH
Country
United States
Zip Code
03824
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