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Related Concept Videos

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Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain. Thus, pain helps the...
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Related Experiment Video

Updated: Jul 9, 2026

Increased Recovery Time and Decreased LPS Administration to Study the Vagus Nerve Stimulation Mechanisms in Limited Inflammatory Responses
06:43

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Neuroeffector mechanisms: the interface between inflammation and neuronal responses

P J Barnes1

  • 1Department of Thoracic Medicine, National Heart and Lung Institute, London, United Kingdom.

The Journal of Allergy and Clinical Immunology
|November 1, 1996
PubMed
Summary

Airway neural control, including cholinergic and non-adrenergic non-cholinergic (NANC) pathways, is complexly linked to inflammation in asthma. Sensory nerves may also contribute to asthma symptoms and inflammation, particularly in severe cases.

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Area of Science:

  • Respiratory Medicine
  • Neuroscience
  • Immunology

Background:

  • Airway neural control significantly impacts asthma pathophysiology.
  • Inflammation can alter neural pathways, affecting bronchomotor tone and symptoms.
  • Cholinergic, adrenergic, and non-adrenergic non-cholinergic (NANC) systems play roles in airway function.

Purpose of the Study:

  • To explore the intricate relationship between airway inflammation and neural control mechanisms in asthma.
  • To investigate the roles of different neural pathways (cholinergic, adrenergic, NANC, sensory) in asthma severity and exacerbations.

Main Methods:

  • Review and synthesis of existing literature on airway neuroinflammation in asthma.
  • Analysis of the functional impact of inflammatory mediators on neural signaling.
  • Examination of proposed abnormalities in neural control in different asthma phenotypes.

Main Results:

  • Cholinergic neurotransmission is a primary driver of bronchoconstriction and may be enhanced by inflammation, explaining anticholinergic drug efficacy in acute asthma.
  • Adrenergic control abnormalities, potentially inflammation-induced, may indirectly affect airway tone.
  • Defects in NANC bronchodilation and altered sensory nerve activation (lowered threshold, axon reflex) are implicated in severe asthma and neurogenic inflammation.

Conclusions:

  • Neural control mechanisms are significantly dysregulated in asthma due to inflammation.
  • Cholinergic pathways are crucial in asthma exacerbations, while NANC and sensory nerve dysfunction may drive severe disease.
  • Understanding these neuro-inflammatory interactions is key for developing targeted asthma therapies.