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000201333 1001_ $$0P:(DE-HGF)0$$aGrison, Alice$$b0
000201333 245__ $$aMesencephalic dopaminergic neurons express a repertoire of olfactory receptors and respond to odorant-like molecules
000201333 260__ $$aLondon$$bBioMed Central$$c2014
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000201333 520__ $$aBackgroundThe mesencephalic dopaminergic (mDA) cell system is composed of two major groups of projecting cells in the Substantia Nigra (SN) (A9 neurons) and the Ventral Tegmental Area (VTA) (A10 cells). Selective degeneration of A9 neurons occurs in Parkinson’s disease (PD) while abnormal function of A10 cells has been linked to schizophrenia, attention deficit and addiction. The molecular basis that underlies selective vulnerability of A9 and A10 neurons is presently unknown.ResultsBy taking advantage of transgenic labeling, laser capture microdissection coupled to nano Cap-Analysis of Gene Expression (nanoCAGE) technology on isolated A9 and A10 cells, we found that a subset of Olfactory Receptors (OR)s is expressed in mDA neurons. Gene expression analysis was integrated with the FANTOM5 Helicos CAGE sequencing datasets, showing the presence of these ORs in selected tissues and brain areas outside of the olfactory epithelium. OR expression in the mesencephalon was validated by RT-PCR and in situ hybridization. By screening 16 potential ligands on 5 mDA ORs recombinantly expressed in an heterologous in vitro system, we identified carvone enantiomers as agonists at Olfr287 and able to evoke an intracellular Ca2+ increase in solitary mDA neurons. ORs were found expressed in human SN and down-regulated in PD post mortem brains.ConclusionsOur study indicates that mDA neurons express ORs and respond to odor-like molecules providing new opportunities for pharmacological intervention in disease.
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000201333 7001_ $$0P:(DE-HGF)0$$aZucchelli, Silvia$$b1
000201333 7001_ $$0P:(DE-HGF)0$$aUrzì, Alice$$b2
000201333 7001_ $$0P:(DE-HGF)0$$aZamparo, Ilaria$$b3
000201333 7001_ $$0P:(DE-HGF)0$$aLazarevic, Dejan$$b4
000201333 7001_ $$0P:(DE-HGF)0$$aPascarella, Giovanni$$b5
000201333 7001_ $$0P:(DE-HGF)0$$aRoncaglia, Paola$$b6
000201333 7001_ $$0P:(DE-HGF)0$$aGiorgetti, Alejandro$$b7
000201333 7001_ $$0P:(DE-HGF)0$$aGarcia-Esparcia, Paula$$b8
000201333 7001_ $$0P:(DE-HGF)0$$aVlachouli, Christina$$b9
000201333 7001_ $$0P:(DE-HGF)0$$aSimone, Roberto$$b10
000201333 7001_ $$0P:(DE-HGF)0$$aPersichetti, Francesca$$b11
000201333 7001_ $$0P:(DE-HGF)0$$aForrest, Alistair RR$$b12
000201333 7001_ $$0P:(DE-HGF)0$$aHayashizaki, Yoshihide$$b13
000201333 7001_ $$0P:(DE-Juel1)145614$$aCarloni, Paolo$$b14$$ufzj
000201333 7001_ $$0P:(DE-HGF)0$$aFerrer, Isidro$$b15
000201333 7001_ $$0P:(DE-HGF)0$$aLodovichi, Claudia$$b16
000201333 7001_ $$0P:(DE-HGF)0$$aPlessy, Charles$$b17
000201333 7001_ $$0P:(DE-HGF)0$$aCarninci, Piero$$b18$$eCorresponding Author
000201333 7001_ $$0P:(DE-HGF)0$$aGustincich, Stefano$$b19$$eCorresponding Author
000201333 773__ $$0PERI:(DE-600)2041499-7$$a10.1186/1471-2164-15-729$$gVol. 15, no. 1, p. 729 -$$n1$$p729 -$$tBMC genomics$$v15$$x1471-2164$$y2014
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