Calcium Overload in Selectively Vulnerable Neurons of the Hippocampus during and after Ischemia: An Electron Microscopy Study in the Rat

Calcium Overload in Selectively Vulnerable Neurons of the Hippocampus during and after Ischemia: An Electron Microscopy Study in the Rat
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缺血期间和之后海马选择性脆弱神经元的钙超载:大鼠电子显微镜研究

DOI:
--
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发表时间:
1984
影响因子:
6.3
通讯作者:
B. Meldrum
B. Meldrum
中科院分区:
医学1区
文献类型:
--
作者:
R. Simon;T. Griffiths;M. Evans;J. H. Swan;B. Meldrum

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用光镜和电镜观察了大鼠前脑缺血30分钟和再灌注30或120分钟后海马的细胞病理学变化。已证明使用草酸盐/焦锑酸盐程序的钙的精细结构定位。再灌注30分钟后,被认为是缺血典型的细胞变化(星形胶质细胞突起肿胀、线粒体膨胀、细胞质浓缩,“缺血性细胞变化”)最为显著。此时,在锥体和肺门神经元中肿胀的线粒体中可见焦锑酸钙致密沉积。再灌注120分钟后,发生了实质性的恢复;大多数线粒体表现正常,几乎没有钙沉积。然而,少数选择性脆弱的神经元(门和锥体神经元)显示密集凝聚(缺血性细胞变化),有多个含钙沉积的空泡。过多的钙离子进入和线粒体钙超载的作用,在再灌注期间,在确定选择性脆弱的神经元的死亡进行了讨论。
Light and electron microscopy has been used to study the cytopathological changes in the rat hippocampus directly after a 30-min period of forebrain ischemia and after 30 or 120 min of reperfusion. The fine structural localization of calcium has been demonstrated using the oxalate/pyroantimonate procedure. Cellular changes considered typical of ischemia (swelling of astrocytic processes, distention of mitochondria, condensation of cytoplasm, “ischemic cell change”) are most prominent after 30 min of reperfusion. At this time, dense calcium pyroantimonate deposits are evident in swollen mitochondria in pyramidal and hilar neurons. After 120 min of reperfusion, substantial restitution has occurred; most mitochondria appear normal and there are few calcium deposits. However, a small number of selectively vulnerable neurons (hilar and pyramidal neurons) show dense condensation (ischemic cell change) with multiple vacuoles containing calcium deposits. The role of excessive calcium entry and mitochondrial calcium overload during the reperfusion period in determining the death of selectively vulnerable neurons is discussed.
DOI: --
发表时间: 1982-05
期刊: Pathologie-biologie
影响因子: --
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T. Wieloch;B. Siesjö
通讯作者: T. Wieloch;B. Siesjö
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DOI: --
发表时间: 1983
期刊: Research publications - Association for Research in Nervous and Mental Disease
影响因子: --
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DOI: 10.1016/0024-3205(82)90473-8
发表时间: 1982
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影响因子: 6.1
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发表时间: 1983
期刊: Stroke
影响因子: 8.3
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通讯作者: Reivich,M