Presynaptic release of ATP from superior cervical ganglion of rats modulated by various receptors.
OBJECTIVE
To determine whether adenosine 5'-triphosphate (ATP) is released from the superior cervical ganglion (SCG) of rats and whether the release is regulated by presynaptic mechanism.


METHODS
Using the luciferin-luciferase technique.


RESULTS
Electric stimulation evoked the release of ATP from the rat SCG. Adenosine (100 mumol.L-1), P1(A1) purinoceptor agonist N6-cyclopentyladenosine (0.1 mumol.L-1), the muscarinic agonist oxotremorine (1 mumol.L-1), and 5-hydroxytryptamine (100 mumol.L-1) decreased the evoked release of ATP from the rat SCG. On the contrary, P1(A1) purinoceptor antagonist 8-cyclopentyl-1,3-dipropylxanthine (10 nmol.L-1), P2 purinoceptor antagonist pyridoxal-5-phosphate-6-azophenyl-2',4-disulphonic acid (10 mumol.L-1), muscarinic antagonist atropine (1 mumol.L-1), alpha 2 adrenoceptor antagonist yohimbine (3 mumol.L-1), D2 dopamine receptor antagonist sulpiride (20 mumol.L-1), and histamine (100 mumol.L-1) increased the evoked release of ATP from the rat SCG.


CONCLUSIONS
ATP is released from the rat SCG and the release of ATP can be presynaptically modulated by P1(A1), P2, muscarinic, alpha adrenergic, D2, 5-HT, and H1 receptor agonists and antagonists.
Liang
S D
SD
Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary. dsrjxmc@public.nc.jx.cn
Vizi
E S
ES
D000241:Adenosine / Q000031:analogs & derivatives / Q000494:pharmacology; D000255:Adenosine Triphosphate / Q000378:metabolism*; D000317:Adrenergic alpha-Antagonists / Q000494:pharmacology; D000818:Animals; D018492:Dopamine Antagonists / Q000494:pharmacology; D005260:Female; D008297:Male; D018721:Muscarinic Agonists / Q000494:pharmacology; D010095:Oxotremorine / Q000494:pharmacology; D058906:Purinergic P1 Receptor Agonists; D058915:Purinergic P1 Receptor Antagonists; D051381:Rats; D018047:Receptors, Purinergic P1; D013469:Sulpiride / Q000494:pharmacology; D017783:Superior Cervical Ganglion / Q000378:metabolism*; D015016:Yohimbine / Q000494:pharmacology
D000317:Adrenergic alpha-Antagonists; D018492:Dopamine Antagonists; D018721:Muscarinic Agonists; D058906:Purinergic P1 Receptor Agonists; D058915:Purinergic P1 Receptor Antagonists; D018047:Receptors, Purinergic P1; D015016:Yohimbine; C048599:N(6)-cyclopentyladenosine; D010095:Oxotremorine; D013469:Sulpiride; D000255:Adenosine Triphosphate; D000241:Adenosine