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Expression of mammalian gamma-aminobutyric acid receptors with distinct pharmacology in Xenopus oocytes.
Open accessAbstract
Gamma-Aminobutyric acid (GABA), the major inhibitory neurotransmitter in mammalian brain, is known to interact with two classes of GABA receptors denoted GABAA and GABAB. Using Xenopus oocytes, we compared the electrical and pharmacological properties of GABA receptors expressed by poly(A)+ RNA isolated from mammalian brain and retina. RNA from cerebral cortex expressed GABA responses with features characteristic of currents mediated by GABAA receptors. In contrast, RNA from retina expressed responses mediated by GABAA receptors and, in addition, GABA responses that were insensitive to the GABAA antagonist bicuculline and the GABAB agonist baclofen and showed no modulation by barbiturates or benzodiazepines. The bicuculline/baclofen-insensitive GABA response was a Cl- current that was blocked by picrotoxin but showed little desensitization or outward rectification. Our results suggest that mammalian retina contains RNAs encoding GABA receptors with distinct pharmacology.
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Metadata
- Authors
- Polenzani, L., Woodward, R. M., & Miledi, R.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 1991-05-15
- Volume
- 88
- Issue
- 10
- Pages
- 4318-4322
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2017795547
- Cited by
- 204
- References
- 0
- FWCI
- 3.42
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Expression of mammalian gamma-aminobutyric acid receptors with distinct pharmacology in Xenopus oocytes. https://app.cochat.ai/papers/10.1073/pnas.88.10.4318
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- Polenzani, L., Woodward, R. M., & Miledi, R. (1991). Expression of mammalian gamma-aminobutyric acid receptors with distinct pharmacology in Xenopus oocytes. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.88.10.4318
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