Effects of catecholamines and purines on luminescence in the brittlestar Amphipholis squamata (Echinodermata)
De Bremaeker, N.; Baguet, F.; Mallefet, J. (2000). Effects of catecholamines and purines on luminescence in the brittlestar Amphipholis squamata (Echinodermata). J. Exp. Biol. 203(13): 2015-2023
In: The Journal of Experimental Biology. Cambridge University Press: London. ISSN 0022-0949; e-ISSN 1477-9145, meer
The effects of catecholamines (dopamine, adrenaline, noradrenaline and its derivatives), 5-hydroxytryptamine and purines (adenosine, ATP and their derivatives) on the acetylcholine-induced luminescence of isolated arms and dissociated photocytes of the luminescent ophiuroid Amphipholis squamata were tested. The results showed that catecholamines and 5-hydroxytryptamine (10-5 to 10-3 mol l-1) had a strong dose-dependent inhibitory effect on acetylcholine-induced luminescence. In contrast, purines (10-4 and 10-3 mol l-1) triggered luminescence in the absence of acetylcholine and/or potentiated acetylcholine-induced luminescence. The results with specific purinergic agonists and antagonists indicated the involvement of P-1- and P-2-like purinoceptors in the control of luminescence.
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