Cited by 131Vagus Nerve Stimulation ResearchNeuropeptides and Animal PhysiologyTrauma, Hemostasis, Coagulopathy, Resuscitation

Adrenocorticotropin reverses hemorrhagic shock in anesthetized rats through the rapid activation of a vagal anti-inflammatory pathway

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GUARINI, S·2004·Cardiovascular Research

Abstract

OBJECTIVE: Several melanocortin peptides have a prompt and sustained resuscitating effect in conditions of hemorrhagic shock. The transcription nuclear factor kappaB (NF-kappaB) triggers a potentially lethal systemic inflammatory response, with marked production of tumor necrosis factor-alpha (TNF-alpha), in hemorrhagic shock. Here we investigated whether the hemorrhagic shock reversal produced by the melanocortin ACTH-(1-24) (adrenocorticotropin) depends on the activation of the recently recognized, vagus nerve-mediated, brain "cholinergic anti-inflammatory pathway". METHODS AND RESULTS: Anesthetized rats were stepwise bled until mean arterial pressure (MAP) stabilized at 20-25 mm Hg. The severe hypovolemia was incompatible with survival, and all saline-treated animals died within 30 min. In rats intravenously (i.v.) treated with ACTH-(1-24), neural efferent activity along vagus nerve (monitored by means of a standard system for extracellular recordings) was markedly increased, and the restoration of cardiovascular and respiratory functions was associated with blunted NF-kappaB activity and with decreased TNF-alpha mRNA liver content and TNF-alpha plasma levels. Bilateral cervical vagotomy, pretreatment with the melanocortin MC(4) receptor antagonist HS014, atropine sulfate or chlorisondamine, but not with atropine methylbromide, prevented the life-saving effect of ACTH-(1-24) and the associated effects on NF-kappaB activity and TNF-alpha levels. HS014 and atropine sulfate prevented, too, the ACTH-(1-24)-induced increase in neural efferent vagal activity, and accelerated the evolution of shock in saline-treated rats. CONCLUSIONS: The present data show, for the first time, that the melanocortin ACTH-(1-24) suppresses the NF-kappaB-dependent systemic inflammatory response triggered by hemorrhage, and reverses shock condition, by brain activation (in real-time) of the "cholinergic anti-inflammatory pathway", this pathway seeming to be melanocortin-dependent.

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Crossref · 10.1016/j.cardiores.2004.03.029

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  • Administration of ACTH 1-24 significantly increases vagus nerve activity in rats.

    “Another approach to stimulating efferent activity in the cholinergic antiinflammatory pathway in this model is by administration of adrenocorticotropic hormone (ACTH 1-24 ), which significantly increased vagus nerve activity in rats.”
  • ACTH 1-24 activates proximal neural networks that increase efferent activity in the cholinergic antiinflammatory pathway to suppress cytokine-mediated damage.

    “Bilateral vagotomy ablated the protective effects of ACTH 1-24 in hemorrhagic shock, providing evidence that ACTH 1-24 activates proximal neural networks that increase efferent activity in the cholinergic antiinflammatory pathway to suppress cytokine-mediated damage (40).”
  • Hemorrhagic shock reversal is mediated via CNS POMC-MC4Rs.

    “In addition, previous studies also showed that hemorrhagic shock reversal is mediated via CNS POMC-MC4Rs and may involve activation of efferent vagal cholinergic pathways [74].”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [74]

  • Hemorrhagic shock reversal may involve activation of efferent vagal cholinergic pathways.

    “In addition, previous studies also showed that hemorrhagic shock reversal is mediated via CNS POMC-MC4Rs and may involve activation of efferent vagal cholinergic pathways [74].”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [74]

  • Microinjections of α-MSH in the nucleus ambiguus exert excitatory effects on parasympathetic preganglionic neurons via activation of MC4R, resulting in increased vagal input to the heart and bradycardia responses.

    “For instance, microinjections of α-MSH in the nucleus ambiguus (nAMB) exerted excitatory effects on parasympathetic preganglionic neurons via activation of MC4R, resulting in increased vagal input to the heart and bradycardia responses [74–76].”

    From Role of the brain melanocortins in blood pressure regulation (2017) · cites this paper as [74]

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Authors
GUARINI, S.
Affiliations
University of Modena and Reggio Emilia (IT)
Corresponding author
GUARINI, S
Venue
Cardiovascular Research
Published
2004-08
Volume
63
Issue
2
Pages
357-365
ISSN
0008-6363 (ISSN-L)
OpenAlex
W2122677936
Cited by
131
References
42
Citations by year
2026: 2 · 2025: 1 · 2024: 3 · 2023: 2 · 2022: 1 · 2021: 3 · 2020: 5 · 2019: 4 · 2018: 6 · 2017: 7 · 2016: 4 · 2015: 9 · 2014: 7 · 2013: 7 · 2012: 12
FWCI
5.01
Type
journal article
Language
en
Open access
Locations
  • Cardiovascular Research (publishedVersion)
  • PubMed (publishedVersion)
  • IRIS UNIMORE (University of Modena and Reggio Emilia) (submittedVersion, cc-by)
Funders
  • Ministero dell’Istruzione, dell’Università e della Ricerca
  • National Institutes of Health
Topics
  • Life Sciences › Neuroscience › Neurology › Vagus Nerve Stimulation Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Critical Care and Intensive Care Medicine › Trauma, Hemostasis, Coagulopathy, Resuscitation
Keywords
ACTH, ACTH1-24, hemorrhagic shock, cholinergic anti-inflammatory pathway, vagus nerve, NF-κB, TNF-α, systemic inflammatory response, vagotomy, hypovolemia, resuscitation
MeSH terms
Acute Disease, Animals, Atropine, Chlorisondamine, Cosyntropin, Female, Liver, Male, Receptors, Nicotinic, RNA, Messenger, Shock, Hemorrhagic, Tumor Necrosis Factor-alpha, Vagus Nerve, NF-kappa B, Rats, Wistar, Reverse Transcriptase Polymerase Chain Reaction, I-kappa B Proteins, Electrophoretic Mobility Shift Assay, Rats

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