ENLARGEMENT OF SYNAPTIC SIZE AS A COMPENSATIVE REACTION IN AGING AND DEMENTIA

被引：23

作者：

BERTONIFREDDARI, C ^{[1
]}

FATTORETTI, P ^{[1
]}

PIERONI, M ^{[1
]}

MEIERRUGE, W ^{[1
]}

ULRICH, J ^{[1
]}

机构：

[1] UNIV BASEL,INST PATHOL,CH-4051 BASEL,SWITZERLAND

来源：

PATHOLOGY RESEARCH AND PRACTICE | 1992年 / 188卷 / 4-5期

关键词：

DEMENTIA; SYNAPTIC SIZE; ALZHEIMERS DISEASE; AGING;

D O I：

10.1016/S0344-0338(11)80066-X

中图分类号：

R36 [病理学];

学科分类号：

100104 ;

摘要：

A quantitative investigation has been carried out on synaptic contact zones of dentate gyrus supragranular layer and cerebellar glomeruli in autoptic samples from adult, old and demented patients. During physiological aging and senile dementia, the synaptic average area was significantly increased as compared to adult values in both the CNS areas investigated. Conversely, the number of contacts and their total surface contact area per unit volume of tissue were decreased. Current literature reports that, in animal models, enlarged synapses undergo perforations and splitting to modify synaptic connectivity. As against these assumptions, the increased synaptic size observed in our study appears to represent a compensative reaction of old and demented CNS to counteract the reduction in number and in total contact area of the synaptic junctions.

引用

页码：612 / 615

页数：4

共 15 条

[1] PHYSIOLOGICAL COMPENSATION FOR LOSS OF AFFERENT SYNAPSES IN RAT HIPPOCAMPAL GRANULE CELLS DURING SENESCENCE [J].