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Characterization of the hyperpolarization-activated chloride current in dissociated rat sympathetic neurons.

Publication ,  Journal Article
Clark, S; Jordt, SE; Jentsch, TJ; Mathie, A
Published in: J Physiol
February 1, 1998

1. Dissociated rat superior cervical ganglion (SCG) neurons have been shown to possess a hyperpolarization-activated inwardly rectifying chloride current. The current was not altered by changes in external potassium concentration, replacing external cations with NMDG (N-methyl-D-glucamine) or by addition of 10 mM caesium or barium ions. 2. The reversal potential of the current was altered by changing external anions. The anion selectivity of the current was Cl- > Br- > I- > cyclamate. All substituted permeant anions also blocked the current. 3. The current was blocked by DIDS (4,4'-diisothiocyanatostilbene-2,2'-disulphonic acid), 9AC (anthracene-9-carboxylic acid) and NPPB (5-nitro-2-(3-phenylpropylamino)benzoic acid) but was unaffected by SITS (4-acetamido-4'-isothiocyanatostilbene- 2,2'-disulphonic acid) and niflumic acid. The effective blockers were voltage dependent; DIDS and NPPB were more effective at depolarized potentials while 9AC was more effective at hyperpolarized potentials. 4. The current was enhanced by extracellular acidification and reduced by extracellular alkalinization. Reducing external osmolarity was without effect in conventional whole-cell recording but enhanced current amplitude in those perforated-patch recordings where little current was evident in control external solution. 5. The current in SCG neurons was blocked by external cadmium and zinc. ClC-2 chloride currents expressed in Xenopus oocytes were also sensitive to block by these divalent ions and by DIDS but the sensitivity of ClC-2 to block by cadmium ions was lower than that of the current in SCG neurons. 6. Reverse transcriptase-polymerase chain reaction (RT-PCR) experiments showed the presence of mRNA for ClC-2 in SCG neurons but not in rat cerebellar granule cells which do not possess a hyperpolarization-activated Cl- current. 7. The data suggest that ClC-2 may be functionally expressed in rat SCG neurons. This current may play a role in regulating the internal chloride concentration in these neurons and hence their response to activation of GABAA receptors.

Duke Scholars

Published In

J Physiol

DOI

ISSN

0022-3751

Publication Date

February 1, 1998

Volume

506 ( Pt 3)

Issue

Pt 3

Start / End Page

665 / 678

Location

England

Related Subject Headings

  • Zinc
  • Sympathetic Nervous System
  • Superior Cervical Ganglion
  • Rats, Sprague-Dawley
  • Rats
  • RNA
  • Polymerase Chain Reaction
  • Physiology
  • Patch-Clamp Techniques
  • Oocytes
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Clark, S., Jordt, S. E., Jentsch, T. J., & Mathie, A. (1998). Characterization of the hyperpolarization-activated chloride current in dissociated rat sympathetic neurons. J Physiol, 506 ( Pt 3)(Pt 3), 665–678. https://doi.org/10.1111/j.1469-7793.1998.665bv.x
Clark, S., S. E. Jordt, T. J. Jentsch, and A. Mathie. “Characterization of the hyperpolarization-activated chloride current in dissociated rat sympathetic neurons.J Physiol 506 ( Pt 3), no. Pt 3 (February 1, 1998): 665–78. https://doi.org/10.1111/j.1469-7793.1998.665bv.x.
Clark S, Jordt SE, Jentsch TJ, Mathie A. Characterization of the hyperpolarization-activated chloride current in dissociated rat sympathetic neurons. J Physiol. 1998 Feb 1;506 ( Pt 3)(Pt 3):665–78.
Clark, S., et al. “Characterization of the hyperpolarization-activated chloride current in dissociated rat sympathetic neurons.J Physiol, vol. 506 ( Pt 3), no. Pt 3, Feb. 1998, pp. 665–78. Pubmed, doi:10.1111/j.1469-7793.1998.665bv.x.
Clark S, Jordt SE, Jentsch TJ, Mathie A. Characterization of the hyperpolarization-activated chloride current in dissociated rat sympathetic neurons. J Physiol. 1998 Feb 1;506 ( Pt 3)(Pt 3):665–678.
Journal cover image

Published In

J Physiol

DOI

ISSN

0022-3751

Publication Date

February 1, 1998

Volume

506 ( Pt 3)

Issue

Pt 3

Start / End Page

665 / 678

Location

England

Related Subject Headings

  • Zinc
  • Sympathetic Nervous System
  • Superior Cervical Ganglion
  • Rats, Sprague-Dawley
  • Rats
  • RNA
  • Polymerase Chain Reaction
  • Physiology
  • Patch-Clamp Techniques
  • Oocytes