ArticleAmerican journal of physiology. Regulatory, integrative and comparative physiology2012
8-OH-DPAT abolishes the pulmonary C-fiber-mediated apneic response to fentanyl largely via acting on 5HT1A receptors in the nucleus tractus solitarius.
Article in American journal of physiology. Regulatory, integrative and comparative physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed, 24 citations in OpenAlex.
- Dermorphin blocks apneic response to intravenous bolus injection of fentanyl.Toxicology and applied pharmacology · 2026Article
- Effects of Intravenous Bolus Injection of Fentanyl on Phrenic Nerve Activity and Its Response to Hypoxia and Hypercapnia.Journal of pharmacy and pharmacology research · 2026Article
- Cardiorespiratory failure and sudden death induced by carfentanil exposure: Involvement of central mu1 opioid receptors.Toxicology and applied pharmacology · 2025Article
- Roles of peripheral and central µAmerican journal of physiology. Lung cellular and molecular physiology · 2025Article
- Sudden Death Induced by Acute Inhalation of Aerosolized Carfentanil.Archives of clinical and biomedical research · 2025Article
- Intravenous bolus injection of fentanyl triggers an immediate central and upper airway obstructive apnea via activating vagal sensory afferents.Journal of applied physiology (Bethesda, Md. : 1985) · 2024Article
- Cardiorespiratory failure induced by inhalation of aerosolized fentanyl in anesthetized rats.Respiratory physiology & neurobiology · 2024Article
- Impact of Serotonergic 5HTInternational journal of molecular sciences · 2024Article
- Apneic response to fentanyl in adult rats: Role of laryngeal afferents.Physiological reports · 2024Article
- L-cysteine ethylester reverses the adverse effects of morphine on breathing and arterial blood-gas chemistry while minimally affecting antinociception in unanesthetized rats.Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2024Article
- Tropine exacerbates the ventilatory depressant actions of fentanyl in freely-moving rats.Frontiers in pharmacology · 2024Article
- D-Cysteine Ethyl Ester Reverses the Deleterious Effects of Morphine on Breathing and Arterial Blood-Gas Chemistry in Freely-Moving Rats.Frontiers in pharmacology · 2022Article
- S-Nitroso-L-Cysteine Stereoselectively Blunts the Deleterious Effects of Fentanyl on Breathing While Augmenting Antinociception in Freely-Moving Rats.Frontiers in pharmacology · 2022Article
- L-cysteine methyl ester overcomes the deleterious effects of morphine on ventilatory parameters and arterial blood-gas chemistry in unanesthetized rats.Frontiers in pharmacology · 2022Article
- Neuronal mechanisms underlying opioid-induced respiratory depression: our current understanding.Journal of neurophysiology · 2021Review
- Depressed GABA and glutamate synaptic signaling by 5-HT1A receptors in the nucleus tractus solitarii and their role in cardiorespiratory function.Journal of neurophysiology · 2014Article
- Isoflurane inhibits bronchopulmonary C-fiber-mediated apneic response to phenylbiguanide by depressing 5-HT3 receptor function in anesthetized rats.Neuroscience letters · 2013Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
Intravenous bolus injection of morphine causes a vagal-mediated brief apnea (∼3 s), while continuous injection, via action upon central μ-opioid receptor (MOR), arrests ventilation (>20 s) that is eliminated by stimulating central 5-hydroxytryptamine 1A receptors (5HT(1A)Rs). Bronchopulmonary C-fibers (PCFs) are essential for triggering a brief apnea, and their afferents terminate at the caudomedial region of the nucleus tractus solitarius (mNTS) that densely expresses 5HT(1A)Rs. Thus we asked whether the vagal-mediated apneic response to MOR agonists was PCF dependent, and if so, whether this apnea was abolished by systemic administration of 8-hydroxy-2-(di-n-propylamino)tetral (8-OH-DPAT) largely through action upon mNTS 5HT(1A)Rs. Right atrial bolus injection of fentanyl (5.0 μg/kg, a MOR agonist) was performed in the anesthetized and spontaneously breathing rats before and after: 1) selective blockade of PCFs' conduction and subsequent bivagotomy; 2) intravenous administration of 5HT(1A)R agonist 8-OH-DPAT; 3) intra-mNTS injection of 8-OH-DPAT; and 4) intra-mNTS injection of 5HT(1A)R antagonist WAY-100635 followed by 8-OH-DPAT (iv). We found the following: First, fentanyl evoked an immediate apnea (2.5 ± 0.4 s, ∼6-fold longer than the baseline expiratory duration, T(E)), which was abolished by either blocking PCFs' conduction or bivagotomy. Second, this apnea was prevented by systemic 8-OH-DPAT challenge. Third, intra-mNTS injection of 8-OH-DPAT greatly attenuated the apnea by 64%. Finally, intra-mNTS microinjection of WAY-100635 significantly attenuated (58%) the apneic blockade by 8-OH-DPAT (iv). We conclude that the vagal-mediated apneic response to MOR activation depends on PCFs, which is fully antagonized by systemic 8-OH-DPAT challenge largely via acting on mNTS 5HT(1A)Rs.
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