Evidence map›Paper›PMID 9660886›Full record

ArticleThe Journal of physiology1998

Hyperpolarization-activated cationic currents (Ih) in neurones of the trigeminal mesencephalic nucleus of the rat.

B S Khakh, G Henderson

Open access · greenAbstract read
In one paragraph

Article in The Journal of physiology, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
1.4field-weighted citation impact, top 18% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 64 citations in OpenAlex.

  1. Review
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  6. Effects of acidic pH on voltage-gated ion channels in rat trigeminal mesencephalic nucleus neurons.The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology · 2017
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  13. Electrophysiological properties of octopus neurons of the cat cochlear nucleus: an in vitro study.Journal of the Association for Research in Otolaryngology : JARO · 2009
    Article
  14. Review
  15. Participation of sodium currents in burst generation and control of membrane excitability in mesencephalic trigeminal neurons.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2006
    Article
  16. Article
  17. cAMP-mediated mechanisms for pain sensitization during opioid withdrawal.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2005
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

B S KhakhDepartment of Pharmacology, School of Medical Sciences, University Walk, University of Bristol, Bristol BS8 1TD, UK. balkhakh@cco.caltech.edu
G Henderson
University of Bristol · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

1. We studied the voltage-dependent current activated by membrane hyperpolarization in sensory proprioceptive trigeminal mesencephalic nucleus (MNV) neurones. 2. Membrane hyperpolarization (from -62 to -132 mV in 10 mV steps) activated slowly activating and non-inactivating inward currents. The hyperpolarization-activated currents could be described by activation curves with a half-maximal activation potential (V ) of -93 mV, slope (k) of 8.4 mV, and maximally activated currents (Imax) of around 1 nA. The reversal potential of the hyperpolarization-activated currents was -57 mV. 3. Extracellular Cs+ blocked hyperpolarization-activated currents rapidly and reversibly in a concentration-dependent manner with an IC50 of 100 microM and Hill slope of 0.8. ZD7288 (1 microM; 4-(N-ethyl-N-phenylamino)-1,2-dimethyl-6-(methylamino) pyridinium chloride), the compound developed as an inhibitor of the cardiac hyperpolarization-activated current (If), also blocked the hyperpolarization-activated currents in MNV neurones. Extracellular Ba2+ (1 mM) did not affect hyperpolarization-activated currents. We tested whether the hyperpolarization-activated currents contribute to the somatic membrane properties of MNV neurones by performing some experiments using current-clamp recording. In such experiments application of Cs+ (1 mM) produced no effect on neuronal resting membrane potentials. 4. During the course of our experiments we noticed that activating ATP-gated non-selective cation channels (P2X receptors) caused an inhibition of Ih associated with a V shift of 10 mV in the hyperpolarizing direction. This P2X receptor-mediated inhibition of Ih was blocked in recordings made with the rapid calcium chelator BAPTA (11 mM) in the pipette solution. 5. We conclude that the current activated by membrane hyperpolarization in MNV neurones is Ih on the basis of its similarity to Ih observed in other neuronal preparations. Activation of Ih can account for the anomalous time-dependent inward rectification that has previously been described in MNV neurones.

Indexed as

AnimalsElectric StimulationElectrophysiologyFemaleIn Vitro TechniquesIon ChannelsMaleMembrane PotentialsMesencephalonNeuronsPatch-Clamp TechniquesPurinergic P2 Receptor AgonistsPurinergic P2 Receptor AntagonistsRatsRats, WistarReceptors, Purinergic P2Ion ChannelsPurinergic P2 Receptor AgonistsPurinergic P2 Receptor AntagonistsReceptors, Purinergic P2

Identifiers

PMID9660886
PMCPMC2231081
OpenAlexW2022005689

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.