内啡肽和单胺类介质在脑缺血时的动态变化

The change of endogenous opiate peptides and monoamines in cerebral tissue after cerebral ischemia

建立大白鼠全脑缺血动物模型，用ＲＩＡ法及荧光分光光度计检测了缺血脑组织匀浆的ＬＥＫ、β－ＥＰ．ＤｙｎＡ１－１３及 ５－ＨＴ和 ５－ＨＩＡＡ的含量，ＬＥＫ在脑组织缺血 ６０ ｍｉｎ时含量略下降，但无统计学意义；β－ＥＰ在脑组织缺血 ３０ ｍｉｎ时显著下降（Ｐ＜０． ０５），缺血 ６０ ｍｉｎ时下降非常显著（Ｐ＜０． ０１）；ＤｙｎＡ１－１３和 ５－ＨＩＡＡ含量在缺血 ６０ ｍｉｎ时明显上升，而 ５－ＨＴ含量则显著下降。上述结果提示内啡肽和单胺类介质均参与了缺血性脑损伤的病理过程。

Rats were used to establish an animal model of cerebral ischemia and the change of endogenous opiate peptides (LEK, β-EP, DynA1-13) and monoamines (5-HT, 5-HIAA) levels in the ischemia cerebral tissue were measured. The main findings were as follows: The levels of LEK reduced slightly in cerebral ischemia for 60 minutes, but the levels of DynA1-13 and 5-HIAA increased obviously in cerebral ischemia for 60 minutes. At the same time the levels of β-EP and 5-HT decreased obviously. The results suggest that the endogenous opiate peptides and monomines play a possible role in the development of cerebral ischemic damage.