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Widespread expression of olfactory cyclic nucleotide-gated channel genes in rat brain: implications for neuronal signalling.
Synapse. 1999 Apr; 32(1):1-12.S

Abstract

The cyclic nucleotides cAMP and cGMP are important intracellular messengers involved in a wide variety of signal transduction events in the nervous system. It has been proposed that cAMP/cGMP elicit some of their effects through direct gating of a novel class of Ca2+ -permeable ion channels that are termed cyclic nucleotide-gated (CNG) channels. Previous studies have identified the expression of a gene encoding one major CNG channel subtype, the olfactory receptor neuron alpha subunit, in the brain [El-Husseini et al. (1995) NeuroReport 6:1331-1335; Kingston et al. (1996a) Proc. Natl. Acad. Sci. U.S.A. 93:10440-10445; Bradley et al. (1997) J. Neurosci. 17:1993-2085]. We, therefore, proposed that the actions of cAMP/cGMP on neurons in the brain might occur through the activation of these CNG channels. To determine how widespread such a function might be, the regional and cellular distribution of the olfactory CNG channel alpha subunit has been examined in detail. Primers for multiple portions of the olfactory CNG channel were used in polymerase chain reaction (PCR) to amplify cDNA reverse-transcribed from several brain regions. The identities of PCR products were confirmed with Southern blots and by sequencing. In situ hybridization experiments demonstrated localization of CNG channel mRNA in discrete neuronal populations throughout the brain. In agreement with previous work, relatively strong hybridization signals are present in neuronal cell bodies of the cerebellum, olfactory bulb, cerebral cortex, and brainstem. Additionally, somewhat lesser signals are found in thalamus, hypothalamus, midbrain, and spinal cord while no hybridization signal was detectable in the caudate nucleus. This surprisingly wide distribution throughout the rat brain strengthens the hypothesis that CNG channels may influence numerous processes as downstream effectors of cyclic nucleotide cascades. Interestingly, the distribution of CNG channels is very similar to that of the nitric oxide/cGMP system, suggesting that one function of CNG channels in the brain could be to link diffusible messengers to elevated Ca2+ entry into neurons.

Authors+Show Affiliations

Kingston PA
Section of Neurobiology, Yale University School of Medicine, New Haven, Connecticut 06510, USA.
Zufall F
No affiliation info available
Barnstable CJ
No affiliation info available

MeSH

AnimalsBrainCerebellumCerebral CortexCyclic AMPCyclic GMPIon Channel GatingIon ChannelsOlfactory PathwaysOlfactory Receptor NeuronsProsencephalonRNA, MessengerRatsRats, Long-EvansRats, Sprague-DawleySpinal Cord

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

10188632

Citation

Kingston, P A., et al. "Widespread Expression of Olfactory Cyclic Nucleotide-gated Channel Genes in Rat Brain: Implications for Neuronal Signalling." Synapse (New York, N.Y.), vol. 32, no. 1, 1999, pp. 1-12.
Kingston PA, Zufall F, Barnstable CJ. Widespread expression of olfactory cyclic nucleotide-gated channel genes in rat brain: implications for neuronal signalling. Synapse. 1999;32(1):1-12.
Kingston, P. A., Zufall, F., & Barnstable, C. J. (1999). Widespread expression of olfactory cyclic nucleotide-gated channel genes in rat brain: implications for neuronal signalling. Synapse (New York, N.Y.), 32(1), 1-12.
Kingston PA, Zufall F, Barnstable CJ. Widespread Expression of Olfactory Cyclic Nucleotide-gated Channel Genes in Rat Brain: Implications for Neuronal Signalling. Synapse. 1999;32(1):1-12. PubMed PMID: 10188632.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Widespread expression of olfactory cyclic nucleotide-gated channel genes in rat brain: implications for neuronal signalling. AU - Kingston,P A, AU - Zufall,F, AU - Barnstable,C J, PY - 1999/4/3/pubmed PY - 2000/6/20/medline PY - 1999/4/3/entrez SP - 1 EP - 12 JF - Synapse (New York, N.Y.) JO - Synapse VL - 32 IS - 1 N2 - The cyclic nucleotides cAMP and cGMP are important intracellular messengers involved in a wide variety of signal transduction events in the nervous system. It has been proposed that cAMP/cGMP elicit some of their effects through direct gating of a novel class of Ca2+ -permeable ion channels that are termed cyclic nucleotide-gated (CNG) channels. Previous studies have identified the expression of a gene encoding one major CNG channel subtype, the olfactory receptor neuron alpha subunit, in the brain [El-Husseini et al. (1995) NeuroReport 6:1331-1335; Kingston et al. (1996a) Proc. Natl. Acad. Sci. U.S.A. 93:10440-10445; Bradley et al. (1997) J. Neurosci. 17:1993-2085]. We, therefore, proposed that the actions of cAMP/cGMP on neurons in the brain might occur through the activation of these CNG channels. To determine how widespread such a function might be, the regional and cellular distribution of the olfactory CNG channel alpha subunit has been examined in detail. Primers for multiple portions of the olfactory CNG channel were used in polymerase chain reaction (PCR) to amplify cDNA reverse-transcribed from several brain regions. The identities of PCR products were confirmed with Southern blots and by sequencing. In situ hybridization experiments demonstrated localization of CNG channel mRNA in discrete neuronal populations throughout the brain. In agreement with previous work, relatively strong hybridization signals are present in neuronal cell bodies of the cerebellum, olfactory bulb, cerebral cortex, and brainstem. Additionally, somewhat lesser signals are found in thalamus, hypothalamus, midbrain, and spinal cord while no hybridization signal was detectable in the caudate nucleus. This surprisingly wide distribution throughout the rat brain strengthens the hypothesis that CNG channels may influence numerous processes as downstream effectors of cyclic nucleotide cascades. Interestingly, the distribution of CNG channels is very similar to that of the nitric oxide/cGMP system, suggesting that one function of CNG channels in the brain could be to link diffusible messengers to elevated Ca2+ entry into neurons. SN - 0887-4476 UR - https://www.unboundmedicine.com/medline/citation/10188632/Widespread_expression_of_olfactory_cyclic_nucleotide_gated_channel_genes_in_rat_brain:_implications_for_neuronal_signalling_ L2 - https://doi.org/10.1002/(SICI)1098-2396(199904)32:1<1::AID-SYN1>3.0.CO;2-M DB - PRIME DP - Unbound Medicine ER -