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Catecolamină

Structura catechinei
Dopamină
Noradrenalină (norepinefrină)
Adrenalină (epinefrină)

O catecolamină (CA) este un compus organic monoaminic, cu grupa amină legată de un catecol (catechină).[1] Cele mai importante catecolamine sunt: dopamina, adrenalina și noradrenalina.

Catecolaminele sunt derivate de la aminoacidul numit tirozină, care la rândul său se introduce în organism prin alimentație sau se obține prin biosinteză, pornind de la fenilalanină.[2] Procesul metabolic de obținere al tirozinei din fenilalanină are loc în prezența unei enzime numită fenilalanin-hidroxilază. Apoi, prin diferite reacții chimice, L-tirozina se transformă în levodopa, un precursor important pentru obținerea dopaminei.[3]

  1. ^ Fitzgerald, P. A. (). „Chapter 11. Adrenal Medulla and Paraganglia”. În Gardner, D. G.; Shoback, D. Greenspan’s Basic & Clinical Endocrinology (ed. 9th). New York: McGraw-Hill. Accesat în . 
  2. ^ Purves, D.; Augustine, G. J.; Fitzpatrick, D.; Hall, W. C.; LaMantia, A. S.; McNamara, J. O.; White, L. E., ed. (). Neuroscience (ed. 4th). Sinauer Associates. pp. 137–8. ISBN 978-0-87893-697-7. 
  3. ^ Joh, T. H.; Hwang, O. (). „Dopamine Beta-Hydroxylase: Biochemistry and Molecular Biology”. Annals of the New York Academy of Sciences. 493: 342–350. doi:10.1111/j.1749-6632.1987.tb27217.x. PMID 3473965. 
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Catecolamină
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