Impaired glial glutamate transport in a mouse tuberous sclerosis epilepsy model.

Abstract:

:Excessive astrocytosis in cortical tubers in tuberous sclerosis complex (TSC) suggests that astrocytes may be important for epileptogenesis in TSC. We previously demonstrated that astrocyte-specific Tsc1 gene inactivation in mice (Tsc1 cKO mice) results in progressive epilepsy. Here, we report that glutamate transporter expression and function is impaired in Tsc1 cKO astrocytes. Tsc1 cKO mice exhibit decreased GLT-1 and GLAST protein expression. Electrophysiological assays demonstrate a functional decrease in glutamate transport currents of Tsc1 cKO astrocytes in hippocampal slices and astrocyte cultures. These findings suggest that Tsc1 inactivation in astrocytes causes dysfunctional glutamate homeostasis, leading to seizure development in TSC.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Wong M,Ess KC,Uhlmann EJ,Jansen LA,Li W,Crino PB,Mennerick S,Yamada KA,Gutmann DH

doi

10.1002/ana.10648

keywords:

subject

Has Abstract

pub_date

2003-08-01 00:00:00

pages

251-6

issue

2

eissn

0364-5134

issn

1531-8249

journal_volume

54

pub_type

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