CEREBELLAR PURKINJE-CELLS FROM THE LURCHER MUTANT AND WILD-TYPE MOUSE GROWN IN-VITRO - A LIGHT AND ELECTRON-MICROSCOPE STUDY

被引：8

作者：

DOUGHTY, ML

PATTERSON, L

CADDY, KWT

机构：

[1] Department of Physiology, University College London, London

来源：

JOURNAL OF COMPARATIVE NEUROLOGY | 1995年 / 357卷 / 01期

基金：

英国惠康基金;

关键词：

EXPLANT; CALBINDIN-D; SYNAPSE; AFFERENT; INTERNEURON;

D O I：

10.1002/cne.903570114

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Lurcher is an autosomal semidominant murine mutation. Lurcher heterozygotes (+/Lc) lose all their cerebellar Purkinje cells by adulthood. Explants from 2 days postnatal (P2) wild-type (+/+) and +/Lc cerebellar cortex were grown in vitro to investigate the role of local neuronal environment and afferent input on the degenerating +/Lc Purkinje cell. In Lurcher explants, Purkinje cells were maintained for up to 25 days in vitro. No significant difference was observed between +/+ and +/Lc Purkinje cell numbers from 10 to 20 days in vitro, as revealed by calbindin-D immunoreactivity. Growing file explants in association with +/+ explants resulted in no significant difference in Purkinje cell survival (10-20 days in vitro). Image analysis of the gross morphology of calbindin-D-immunostained Purkinje cells from +/+ and +/Lc explants grown in vitro revealed a significant decrease in the total area and dendritic lengths of +/Lc Purkinje cells (15 and 20 days in vitro). The fine structure of +/Lc and +/+ Purkinje cells was examined under the electron microscope (10-25 days in vitro). No difference in ultrastructure was observed between +/Lc and +/+ Purkinje cells grown in vitro, and many features similar to normal Purkinje cell development in vivo were present. These included monosynaptic parallel fibre synapses with Purkinje cell dendritic spines, other interneuron synapses with Purkinje cell dendrites and soma, astroglial investment, and minimal extracellular space in the neuropil. Unusual features observed included a persistence of the perisomatic spines in some Purkinje cells, an absence of Nissl bodies in the Purkinje cell perikaryon, naked Purkinje cell dendritic spines, and occasional heterologous synapses. The results are discussed in the light of previous chimeric analysis of the Lurcher mutation, and a hypothesis is put forward to explain the survival of +/Lc Purkinje cells in vitro. (C) 1995 Wiley-Liss, Inc.

引用

页码：161 / 179

页数：19

共 57 条

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