Cited by 160Ion channel regulation and functionNeuroscience and Neuropharmacology ResearchNeural dynamics and brain function

Cortical HCN channels: Function, trafficking and plasticity

Open access
Shah, Mala M.·2014·The Journal of Physiology

Abstract

The hyperpolarization‐activated cyclic nucleotide‐gated (HCN) channels belong to the superfamily of voltage‐gated potassium ion channels. They are, however, activated by hyperpolarizing potentials and are permeable to cations. Four HCN subunits have been cloned, of which HCN1 and HCN2 subunits are predominantly expressed in the cortex. These subunits are principally located in pyramidal cell dendrites, although they are also found at lower concentrations in the somata of pyramidal neurons as well as other neuron subtypes. HCN channels are actively trafficked to dendrites by binding to the chaperone protein TRIP8b. Somato‐dendritic HCN channels in pyramidal neurons modulate spike firing and synaptic potential integration by influencing the membrane resistance and resting membrane potential. Intriguingly, HCN channels are present in certain cortical axons and synaptic terminals too. Here, they regulate synaptic transmission but the underlying mechanisms appear to vary considerably amongst different synaptic terminals. In conclusion, HCN channels are expressed in multiple neuronal subcellular compartments in the cortex, where they have a diverse and complex effect on neuronal excitability.

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Crossref · 10.1113/jphysiol.2013.270058

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  • Ih is tuned by cAMP and TRIP8b and cooperates with Kir2 and M-type K+ conductances to set effective gain.

    “Ih is tuned by cAMP and the auxiliary subunit tetratricopeptide repeat–containing Rab8b-interacting protein (TRIP8b), and it cooperates with inwardly rectifying potassium channel subfamily 2 (Kir2) and M-type K+ conductances to set effective gain [276,277,278].”

    From Synaptic Plasticity—Intrinsic Excitability and Antidepressant Discovery (2026) · cites this paper as [276]

    The dendritic and pre-synaptic HCN1 trafficking section says TRIP8b affects Ih activation and HCN sensitivity to cyclic nucleotides; the paper also says HCN subunits are modulated by cyclic nucleotides. The somato-dendritic HCN channel function section describes a conditional relationship between Ih and KV7/M-channels in EPSP summation. The reviewed passages do not establish cooperation with Kir2 channels or the claimed combined effect on effective gain (no page numbers provided). (LLM, conf=0.86)

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Authors
Shah, M. M.
Affiliations
UCL School of Pharmacy (GB)
Corresponding author
Shah, Mala M.
Venue
The Journal of Physiology
Publisher
Wiley
Published
2014-05-20
Volume
592
Issue
13
Pages
2711-2719
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W1548022409
Cited by
160
References
90
Citations by year
2026: 6 · 2025: 13 · 2024: 26 · 2023: 14 · 2022: 11 · 2021: 17 · 2020: 16 · 2019: 8 · 2018: 13 · 2017: 12 · 2016: 12 · 2015: 11 · 2014: 1
FWCI
1.13
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
Biotechnology and Biological Sciences Research Council (BB/L000679/1)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
HCN channels, HCN1, HCN2, TRIP8b, cortical pyramidal neurons, neuronal excitability, resting membrane potential, membrane resistance, synaptic transmission, synaptic terminals, axons, subcellular localization, synaptic plasticity
MeSH terms
Animals, Axonal Transport, Cerebral Cortex, Humans, Long-Term Potentiation, Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels

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