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Updated: Aug 29, 2025

Utilizing the Precision-Cut Lung Slice to Study the Contractile Regulation of Airway and Intrapulmonary Arterial Smooth Muscle
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Airway Smooth Muscles Contractions in Metabolic Syndrome.

Yu G Birulina1, V V Ivanov2, E E Buiko2

  • 1Siberian State Medical University, Ministry of Health of the Russian Federation, Tomsk, Russia. birulina20@yandex.ru.

Bulletin of Experimental Biology and Medicine
|September 4, 2022
PubMed
Summary

Metabolic syndrome in rats altered airway smooth muscle responses, increasing constriction to carbacholine and decreasing dilation to salbutamol. These changes were linked to airway inflammation and tissue remodeling.

Keywords:
bronchopulmonary systemmetabolic syndromesmooth muscles

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Area of Science:

  • Physiology
  • Pharmacology
  • Pathology

Background:

  • Metabolic syndrome is a cluster of conditions that increase the risk of heart disease, stroke, and diabetes.
  • Airway smooth muscle (ASM) function is critical for regulating airflow, and its dysfunction is implicated in respiratory diseases.

Purpose of the Study:

  • To investigate the effects of metabolic syndrome on the contractile responses of isolated rat airway smooth muscle.
  • To determine the role of the bronchial epithelium in these altered responses.

Main Methods:

  • Metabolic syndrome was induced in rats using a high-fat and high-carbohydrate diet.
  • Contractile responses of isolated airway smooth muscle segments were measured.
  • The effects of carbachol (cholinergic activator) and salbutamol (β2-adrenoreceptor activator) were assessed.

Main Results:

  • Metabolic syndrome significantly increased the bronchoconstrictor action of carbachol.
  • Metabolic syndrome decreased the bronchodilatory effect of salbutamol.
  • These agonist effects were dependent on the presence of the bronchial epithelium.
  • Airway smooth muscle dysfunction was associated with bronchial epithelium destruction, inflammation, and adipose tissue hypertrophy.

Conclusions:

  • Metabolic syndrome disrupts normal airway smooth muscle contractility and relaxation.
  • The bronchial epithelium plays a crucial role in mediating these metabolic syndrome-induced airway smooth muscle alterations.
  • These findings suggest a link between metabolic derangements and airway pathophysiology.