Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 97, Issue 21, Pages 11587-11592Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.97.21.11587
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Rab CDP dissociation inhibitor alpha (Rab GDl alpha) is a regulator of the Rab small G proteins implicated in neurotransmission, and mutations of Rab GDl alpha cause human X-linked mental retardation associated with epileptic seizures. In Rab GDl alpha-deficient mice, synaptic potentials in the CA1 region of the hippocampus displayed larger enhancement during repetitive stimulation, which was apparently opposite to the phenotype of Rab3A-deficient mice. Furthermore, the Rab GDl alpha-deficient mice showed hypersensitivity to bicuculline, an inducer of epileptic seizures. These results suggest that Rab GDl alpha plays a specialized role in Rab3A recycling to suppress hyperexcitability via modulation of presynaptic forms of plasticity.
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