ArticleCardiovascular research2022
Impaired Kv7 channel activity in the central amygdala contributes to elevated sympathetic outflow in hypertension.
Article in Cardiovascular research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 23 citations in OpenAlex.
- The Rostral Ventrolateral Medulla Input to Central Amygdala Regulates Anxiety-Like Behaviors in Mice for Chronic Light Exposure.CNS neuroscience & therapeutics · 2026Article
- PDZD8 Dysregulation Mediates RVLM Neuronal Hyperexcitation Via Activation of CaMolecular neurobiology · 2025Article
- Evaluation of Small-Molecule Candidates as Modulators of M-Type KInternational journal of molecular sciences · 2025Review
- Amygdala-hypothalamus-brainstem circuits underlying cardiovascular responses associated with the limits of high-intensity endurance exercise.Frontiers in physiology · 2025Review
- Acetic Acid: An Underestimated Metabolite in Ethanol-Induced Changes in Regulating Cardiovascular Function.Antioxidants (Basel, Switzerland) · 2024Review
- The central mechanisms of electroacupuncture at LR3 in the treatment of spontaneous hypertension: a PET and mRNA transcriptome study.Frontiers in cardiovascular medicine · 2024Article
- A neural perspective on the treatment of hypertension: the neurological network excitation and inhibition (E/I) imbalance in hypertension.Frontiers in cardiovascular medicine · 2024Review
- Corticotropin-releasing hormone neurons in the central nucleus of amygdala are required for chronic stress-induced hypertension.Cardiovascular research · 2023Article
- Hypothalamic Corticotropin-Releasing Hormone Contributes to Hypertension in Spontaneously Hypertensive Rats.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2023Article
- Ethanol Metabolite, Acetate, Increases Excitability of the Central Nucleus of Amygdala Neurons through Activation of NMDA Receptors.ACS chemical neuroscience · 2023Article
- Genetic Knockout of TRPM2 Increases Neuronal Excitability of Hippocampal Neurons by Inhibiting Kv7 Channel in Epilepsy.Molecular neurobiology · 2022Article
- Resveratrol in the Hypothalamic Paraventricular Nucleus Attenuates Hypertension by Regulation of ROS and Neurotransmitters.Nutrients · 2022Article
- Evidence for Dual Activation ofInternational journal of molecular sciences · 2022Article
- Involvement of TRPC5 channels, inwardly rectifying KThe Journal of physiology · 2021Article
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Authors and funding
11 authors at 3 institutions in 1 country.
Funding
Abstract
aimsElevated sympathetic outflow is associated with primary hypertension. However, the mechanisms involved in heightened sympathetic outflow in hypertension are unclear. The central amygdala (CeA) regulates autonomic components of emotions through projections to the brainstem. The neuronal Kv7 channel is a non-inactivating voltage-dependent K+ channel encoded by KCNQ2/3 genes involved in stabilizing the neuronal membrane potential and regulating neuronal excitability. In this study, we investigated if altered Kv7 channel activity in the CeA contributes to heightened sympathetic outflow in hypertension. METHODS AND
resultsThe mRNA and protein expression levels of Kv7.2/Kv7.3 in the CeA were significantly reduced in spontaneously hypertensive rats (SHRs) compared with Wistar-Kyoto (WKY) rats. Lowering blood pressure with coeliac ganglionectomy in SHRs did not alter Kv7.2 and Kv7.3 channel expression levels in the CeA. Fluospheres were injected into the rostral ventrolateral medulla (RVLM) to retrogradely label CeA neurons projecting to the RVLM (CeA-RVLM neurons). Kv7 channel currents recorded from CeA-RVLM neurons in brain slices were much smaller in SHRs than in WKY rats. Furthermore, the basal firing activity of CeA-RVLM neurons was significantly greater in SHRs than in WKY rats. Bath application of specific Kv7 channel blocker 10, 10-bis (4-pyridinylmethyl)-9(10H)-anthracnose (XE-991) increased the excitability of CeA-RVLM neurons in WKY rats, but not in SHRs. Microinjection of XE-991 into the CeA increased arterial blood pressure (ABP) and renal sympathetic nerve activity (RSNA), while microinjection of Kv7 channel opener QO-58 decreased ABP and RSNA, in anaesthetized WKY rats but not SHRs.
conclusionsOur findings suggest that diminished Kv7 channel activity in the CeA contributes to elevated sympathetic outflow in primary hypertension. This novel information provides new mechanistic insight into the pathogenesis of neurogenic hypertension.
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