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Hanusrichterova J, Kolomaznik M, Barosova R, Adamcakova J, Mokra D, Mokry J, Skovierova H, Kelly MM, de Heuvel E, Wiehler S, Proud D, Shen H, Mukherjee PG, Amrein MW, Calkovska A. Pulmonary surfactant and prostaglandin E 2 in airway smooth muscle relaxation of human and male guinea pigs. Physiol Rep 2024; 12:e70026. [PMID: 39245804 PMCID: PMC11381196 DOI: 10.14814/phy2.70026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 08/12/2024] [Accepted: 08/22/2024] [Indexed: 09/10/2024] Open
Abstract
Pulmonary surfactant serves as a barrier to respiratory epithelium but can also regulate airway smooth muscle (ASM) tone. Surfactant (SF) relaxes contracted ASM, similar to β2-agonists, anticholinergics, nitric oxide, and prostanoids. The exact mechanism of surfactant relaxation and whether surfactant relaxes hyperresponsive ASM remains unknown. Based on previous research, relaxation requires an intact epithelium and prostanoid synthesis. We sought to examine the mechanisms by which surfactant causes ASM relaxation. Organ bath measurements of isometric tension of ASM of guinea pigs in response to exogenous surfactant revealed that surfactant reduces tension of healthy and hyperresponsive tracheal tissue. The relaxant effect of surfactant was reduced if prostanoid synthesis was inhibited and/or if prostaglandin E2-related EP2 receptors were antagonized. Atomic force microscopy revealed that human ASM cells stiffen during contraction and soften during relaxation. Surfactant softened ASM cells, similarly to the known bronchodilator prostaglandin E2 (PGE2) and the cell softening was abolished when EP4 receptors for PGE2 were antagonized. Elevated levels of PGE2 were found in cultures of normal human bronchial epithelial cells exposed to pulmonary surfactant. We conclude that prostaglandin E2 and its EP2 and EP4 receptors are likely involved in the relaxant effect of pulmonary surfactant in airways.
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Grants
- APVV-17-0250 Agentúra na Podporu Výskumu a Vývoja (APVV)
- VEGA 1/0055/19 Vedecká Grantová Agentúra MŠVVaŠ SR a SAV (VEGA)
- 26246 Ministerstvo školstva, vedy, výskumu a športu SR | Agentúra Ministerstva Školstva, Vedy, Výskumu a Športu SR (Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic for the Structural Funds of EU)
- 34237 Ministerstvo školstva, vedy, výskumu a športu SR | Agentúra Ministerstva Školstva, Vedy, Výskumu a Športu SR (Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic for the Structural Funds of EU)
- University of Calgary (U of C)
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Affiliation(s)
- J Hanusrichterova
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - M Kolomaznik
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - R Barosova
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - J Adamcakova
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - D Mokra
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - J Mokry
- Department of Pharmacology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - H Skovierova
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - M M Kelly
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - E de Heuvel
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - S Wiehler
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - D Proud
- Department of Physiology and Pharmacology and Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - H Shen
- Department of Mathematics and Statistics, Faculty of Science, University of Calgary, Calgary, Alberta, Canada
| | - P G Mukherjee
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - M W Amrein
- Department of Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - A Calkovska
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
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Chen Z, Liu Y, Huang W. Alveolar macrophage modulation via the gut-lung axis in lung diseases. Front Immunol 2023; 14:1279677. [PMID: 38077401 PMCID: PMC10702770 DOI: 10.3389/fimmu.2023.1279677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 11/06/2023] [Indexed: 12/18/2023] Open
Abstract
Several studies have demonstrated great potential implications for the gut-lung axis in lung disease etiology and treatment. The gut environment can be influenced by diet, metabolites, microbiotal composition, primary diseases, and medical interventions. These changes modulate the functions of alveolar macrophages (AMs) to shape the pulmonary immune response, which greatly impacts lung health. The immune modulation of AMs is implicated in the pathogenesis of various lung diseases. However, the mechanism of the gut-lung axis in lung diseases has not yet been determined. This mini-review aimed to shed light on the critical nature of communication between the gut and AMs during the development of pulmonary infection, injury, allergy, and malignancy. A better understanding of their crosstalk may provide new insights into future therapeutic strategies targeting the gut-AM interaction.
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Affiliation(s)
| | | | - Weizhe Huang
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Shantou University Medical College, Shantou, China
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