[Daily cyclic changes in thyroid cAMP in chickens (Gallus domesticus)].
48 White Leghorn cockereles (age: 4 weeks) were examined for daily alterations of thyroidal and plasma cAMP-concentrations by means of a radioimmunoassay. In the morning and in the evening the thyroidal cAMP-concentration was elevated. This elevation was accompanied by a decrease of thyroid-weight. Alterations of blood cAMP-concentration were without recognizable effect on thyroid function. It is assumed that mediated by the effect of the second messenger more thyreoglobulin is released at these times.
D000818:Animals; D002645:Chickens; D002940:Circadian Rhythm; D000242:Cyclic AMP / Q000097:blood / Q000378:metabolism*; D008297:Male; D013961:Thyroid Gland / Q000378:metabolism*
D000242:Cyclic AMP
Tageszyklische Anderungen der thyreoidalen cAMP-Konzentration bei Hähnchen (Gallus domesticus).