Plasma and gastric juice substance P (SP), vasoactive intestinal peptide (VIP) and leu-enkephalin (LEK) were measured by radioimmunoassay kit.
血浆和胃液物质P（sP）、血管活性肠肽（VIP）和亮脑啡肽（LEK）均用放射免疫法测定。
2
Objective: To explore the leu-enkephalin (L-ENK) levels in the plasma and CSF of patients with cerebral hemorrhage, and the effect of naloxone on the levels.
目的：探讨脑出血患者血浆和脑脊液中亮氨酸脑啡肽(L - ENK)的含量变化以及纳络酮对其影响。
3
Objective To investigate the effect of conditioned taste aversion (CTA) acquisition and retention on the expression of endogenous leu-enkephalin (LEK) in rats.