the effect in vivo of the plasma proteins in human serum on the transport of [ 3h ] testosterone ( t ) , [ 3h ] -dihydrotestosterone ( dht ) , and [ 3h ] estradiol ( e2 ) through the brain capillary wall , i.e. , the blood-brain barrier , was studied in anesthetized rats using a tissue-sampling-single-injection technique , in the absence of plasma proteins , approximately 90 % of plasma t , dht , or e2 was transported into brain on a single pass after a bolus carotid injection of labeled hormone .
C0229671
serum
C0032105
plasma