Albonetti M E, D'Udine B, Oliverio A
Neurosci Lett. 1985 Jun 24;57(3):233-6. doi: 10.1016/0304-3940(85)90496-3.
6-day-old mice pups were injected with D-amino acids (D-phenyl-alanine + D-leucine), and their ultrasonic distress vocalizations were measured. D-Amino acids, which exert opioid-like effects, reduce the number of ultrasonic calls without affecting the activity of the pups. This effect is reversed by naloxone, an opioid antagonist. The role of endogenous opioids in modulating early attachment is discussed.
给6日龄的小鼠幼崽注射D-氨基酸（D-苯丙氨酸+D-亮氨酸），并测量它们的超声波求救叫声。具有类阿片样作用的D-氨基酸可减少超声波叫声的数量，而不影响幼崽的活动。阿片拮抗剂纳洛酮可逆转这种作用。文中讨论了内源性阿片类物质在调节早期依恋中的作用。
