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Noradrenergic control of skin colour

This study revealed that a crucial factor for the observed difference in skin colour between wild and (non-carotenoid fed) reared red porgy is due to differences in the expression of cerebral alpha 2 and beta adrenoceptors between wild and cultured fish. In most cases, down regulation of á2 and â adrenoceptors found in cultured teleost brain is possibly related to stress mechanisms due to the specific cultured environmental conditions.

However, specific differences in hypothalamic (TA) and thalamic (TPp) areas, known to participate in the melanin-concentrating hormone system, indicate a possible role of central adrenoceptors in plasticity mechanisms of functional brain circuits regulating colour alterations.

Parts of the results are of scientific interest exclusively between partners for the present and TIP will help partners to clarify and detail our strategy in future project applications. Development of know how and methodologies for determining noradrenergic neurotransmitter receptors and their function in pagrus skin and brain.

Reported by

University of Crete
71409 Heraklion
Greece
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