ArticleDNA and cell biology2013
Novel role of KT5720 on regulating hyperpolarization-activated cyclic nucleotide-gated channel activity and dorsal root ganglion neuron excitability.
Article in DNA and cell biology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 19 citations in OpenAlex.
- Clonidine protects rat hippocampal and cortical neurons from oxygen-glucose deprivation and reoxygenation-induced injury through HCN Channels.Scientific reports · 2026Article
- Blockage of HCN Channels Inhibits the Function of P2X Receptors in Rat Dorsal Root Ganglion Neurons.Neurochemical research · 2022Article
- Involvement of Protein Kinase A in Oxytocin Neuronal Activity in Rat Dams with Pup Deprivation.Neurochemical research · 2021Article
- Physiology and Therapeutic Potential of SK, H, and M Medium AfterHyperPolarization Ion Channels.Frontiers in molecular neuroscience · 2021Review
- Noradrenaline Modulates the Membrane Potential and Holding Current of Medial Prefrontal Cortex Pyramidal Neurons via βFrontiers in cellular neuroscience · 2017Article
- Peripheral Neuropathy Induces HCN Channel Dysfunction in Pyramidal Neurons of the Medial Prefrontal Cortex.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2015Article
- HCN channels--modulators of cardiac and neuronal excitability.International journal of molecular sciences · 2015Review
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels are expressed in dorsal root ganglion (DRG) neurons, which are involved in diverse mechanisms that regulate DRG functions. Protein kinase A (PKA) is an essential kinase that plays a key role in almost all types of cells; it regulates the ion channel activity, the intracellular Ca(2+) concentration, as well as modulates cellular signals transduction. Nevertheless, the effect of PKA inhibition on the HCN channel activity in DRG neuron remains to be elucidated. Here we investigated the impact of PKA inhibition on the HCN channel activity and DRG neurons excitability. Our patch-clamp experiments both under whole-cell and single-channel conditions demonstrated that PKA inhibition with KT5720, a cell membrane permeable PKA-specific inhibitor, significantly attenuated HCN channel currents. Current clamp recording on freshly isolated DRG neurons showed KT5720 reduced overshoot amplitude and enhanced the threshold of the action potential. Moreover, our live-cell Ca(2+) imaging experiments illustrated KT5720 markedly reduced the intracellular Ca(2+) level. Collectively, this is the first report that addresses KT5720 attenuates the HCN channel activity and intracellular Ca(2+), thus reducing DRG neurons excitability. Therefore, our data strongly suggest that PKA is a potential target for curing HCN and DRG neuron relevant diseases.
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