using specific radioimmunoassays ( rias ) , we measured trh immunoreactivity ( trh-ir ) and trh-gly-ir concentrations in blood , hypothalamus , anterior and posterior pituitary , and thyroid in euthyroid , hypothyroid and thyroxine ( t4 ) -treated 250 g male sprague-dawley rats .
C0020676
hypothyroid
C0040165
thyroxine