TISSUE-PLASMINOGEN ACTIVATOR IS INDUCED AS AN IMMEDIATE EARLY GENE DURING SEIZURE, KINDLING AND LONG-TERM POTENTIATION

被引:656
|
作者
QIAN, Z
GILBERT, ME
COLICOS, MA
KANDEL, ER
KUHL, D
机构
[1] COLUMBIA UNIV COLL PHYS & SURG,HOWARD HUGHES MED INST,NEW YORK,NY 10032
[2] MANTECH ENVIRONM TECHNOL INC,RES TRIANGLE PK,NC 27709
关键词
D O I
10.1038/361453a0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
THE requirement of protein and messenger RNA synthesis for long-term memory1,2 suggests that neural activity induced by learning initiates a cascade of gene expression3. Here we use differential screening to identify five immediate-early genes induced by neuronal activity. One of these is tissue-plasminogen activator (tPA), an extracellular serine protease, which is induced with different spatial patterns in the brain by three activity-dependent events: (1) convulsive seizure increases expression of tPA in the whole brain; (2) stimulation of the perforant path produces an epileptiform after-discharge that ultimately leads to kindling increases the levels of tPA throughout the hippocampus bilaterally; and (3) brief high-frequency stimulation of the perforant path that produces long-term potentiation (LTP) causes an NMDA (N-methyl-D-aspartate) receptor-mediated increase in the levels of tPA mRNA which is restricted to the granule cells of the ipsilateral dentate gyrus. As release of tPA is correlated with morphological differentiation4-6, the increased expression of tPA may play a role in the structural changes that accompany activity-dependent plasticity7-10.
引用
收藏
页码:453 / 457
页数:5
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