Presence of nicotinic, purinergic and dopaminergic receptors and the TASK-1 K+-channel in the mouse carotid body.
We have characterized the mouse carotid body (CB) with special attention to nicotinic, purinergic and dopaminergic receptors as well as the TASK-1 K(+)-channel. Mouse CB sections were stained immunohistochemically and visualized using fluorescent and confocal microscopy. The CB type 1 cells contained the alpha3 (n=8), alpha4 (n=7), alpha7 (n=4) and beta2 (n=3) nicotinic acetylcholine receptor (nAChR) subunits, the ATP-receptors P2X(2) (n=15) and P2X(3) (n=9), the dopamine D(2) receptor (n=9) and the TASK-1 K(+)-channel (n=7). Here we report the presence of alpha3, alpha4, alpha7 and beta2 nAChR subunits, the D(2) receptor and the TASK-1 K(+)-channel in the mouse CB. Also, we confirm the presence of the P2X(2) and P2X(3) receptors in mouse CB. Thus, we have localized nicotinergic, purinergic and dopaminergic receptors and the TASK-1 K(+)-channel on a protein level in one species. Our data are in line with the theory that the CB chemoreceptor cell hosts an orchestra of receptor systems that ultimately modulate the response to hypoxia.
Kåhlin
Jessica
J
Department of Anesthesiology and Intensive Care Medicine, Karolinska University Hospital, Stockholm, Sweden. jessica.kahlin@karolinska.se
Eriksson
Lars I
LI
Ebberyd
Anette
A
Fagerlund
Malin Jonsson
MJ
D000818:Animals; D002344:Carotid Body / Q000378:metabolism*; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D007150:Immunohistochemistry; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018613:Microscopy, Confocal; D009419:Nerve Tissue Proteins / Q000378:metabolism*; D016900:Neurofilament Proteins / Q000378:metabolism; D024683:Potassium Channels, Tandem Pore Domain / Q000378:metabolism*; D011954:Receptors, Dopamine / Q000187:drug effects / Q000378:metabolism*; D011978:Receptors, Nicotinic / Q000187:drug effects / Q000378:metabolism*; D011983:Receptors, Purinergic / Q000187:drug effects / Q000378:metabolism*; D018048:Receptors, Purinergic P2 / Q000187:drug effects / Q000378:metabolism; D058469:Receptors, Purinergic P2X; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014404:Tubulin / Q000378:metabolism; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism
D005904:Glial Fibrillary Acidic Protein; D009419:Nerve Tissue Proteins; D016900:Neurofilament Proteins; D024683:Potassium Channels, Tandem Pore Domain; D011954:Receptors, Dopamine; D011978:Receptors, Nicotinic; D011983:Receptors, Purinergic; D018048:Receptors, Purinergic P2; D058469:Receptors, Purinergic P2X; D014404:Tubulin; C420132:potassium channel subfamily K member 3; D014446:Tyrosine 3-Monooxygenase