Glial cells maintain synaptic structure and function and promote development of the neuromuscular junction in vivo.

Abstract:

:To investigate the in vivo role of glial cells in synaptic function, maintenance, and development, we have developed an approach to selectively ablate perisynaptic Schwann cells (PSCs), the glial cells at the neuromuscular junction (NMJ), en masse from live frog muscles. In adults, following acute PSC ablation, synaptic structure and function were not altered. However, 1 week after PSC ablation, presynaptic function decreased by approximately half, while postsynaptic function was unchanged. Retraction of nerve terminals increased over 10-fold at PSC-ablated NMJs. Furthermore, nerve-evoked muscle twitch tension was reduced. In tadpoles, repeated in vivo observations revealed that PSC processes lead nerve terminal growth. In the absence of PSCs, growth and addition of synapses was dramatically reduced, and existing synapses underwent widespread retraction. Our findings provide in vivo evidence that glial cells maintain presynaptic structure and function at adult synapses and are vital for the growth and stability of developing synapses.

journal_name

Neuron

journal_title

Neuron

authors

Reddy LV,Koirala S,Sugiura Y,Herrera AA,Ko CP

doi

10.1016/s0896-6273(03)00682-2

subject

Has Abstract

pub_date

2003-10-30 00:00:00

pages

563-80

issue

3

eissn

0896-6273

issn

1097-4199

pii

S0896627303006822

journal_volume

40

pub_type

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