Regulation of GABAA-receptor surface expression with special reference to the involvement of GABARAP (GABAA receptor-associated protein) and PRIP (phospholipase C-related, but catalytically inactive protein)

Takashi Kanematsu, Akiko Mizokami, Keiko Watanabe, Masato Hirata

Research output: Contribution to journalReview article

35 Citations (Scopus)

Abstract

GABAA receptors are heteropentameric ligand-gated chloride channels composed of a variety of subunits, including α1 - 6, β1 - 3, γ1 - 3, δ, ε, θ, and π, and play a key role in controlling inhibitory neuronal activity. Modification of the efficacy of the synaptic strength is produced by changes in both the number of neuronal surface receptors and pentameric molecular assembly, leading to differences of sensitivity to neurotransmitters and neuromimetic drugs. Therefore, it is important to understand the molecular mechanisms regulating the so-called "life cycle of GABAA receptors" including sequential pentameric assembly at the site synthesized, intracellular transport through the Golgi apparatus and the cytoplasm, insertion into the cell membrane, functional modulation at the cell surface, and finally internalization, followed by either recycling back to the surface membrane or lysosomal degradation. This review is focused on events related to the surface expression of the receptor containing the γ2 subunit and clathrin /AP2 complex-mediated phospho-regulated endocytosis of the receptor, with special reference to the function of novel GABAA receptor modulators, GABARAP (GABAA receptor-associated protein) and PRIP (phospholipase C-related, but catalytically inactive protein).

Original languageEnglish
Pages (from-to)285-292
Number of pages8
JournalJournal of Pharmacological Sciences
Volume104
Issue number4
DOIs
Publication statusPublished - Sep 13 2007

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All Science Journal Classification (ASJC) codes

  • Molecular Medicine
  • Pharmacology

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