The effects temperature and anesthetic agents on ciliary function in murine respiratory epithelia

Christopher, Adam B., Ochoa, Sebastian, Krushansky, Evonne, Francis, Richard, Tian, Xin, Zahid, Maliha, Munoz, Ricardo, and Lo, Cecilia W. (2014) The effects temperature and anesthetic agents on ciliary function in murine respiratory epithelia. Frontiers in Pediatrics, 2. 111.

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Background: Mucus transport mediated by motile cilia in the airway is an important defense mechanism for prevention of respiratory infections. As cilia motility can be depressed by hypothermia or exposure to anesthetics, in this study, we investigated the individual and combined effects of dexmedetomidine (dex), fentanyl (fen), and/or isoflurane (iso) at physiologic and low temperatures on cilia motility in mouse tracheal airway epithelia. These anesthetic combinations and low temperature conditions are often used in the setting of cardiopulmonary bypass surgery, surgical repair of congenital heart disease, and cardiac intensive care.

Methods: C57BL/6J mouse tracheal epithelia were excised and cilia dynamics were captured by videomicroscopy following incubation at 15, 22-24, and 37 degrees C with different combinations of therapeutic concentrations of dex (10 nM), fen (10 nM), and iso (0.01 %). Airway ciliary motion was assessed and compared across conditions by measuring ciliary beat frequency and ciliary flow velocity. Statistical analysis was carried out using unpaired t-tests, analysis of variance, and multivariate linear regression.

Results:There was a linear correlation between cilia motility and temperature. Fen exerted cilia stimulatory effects, while dex and iso each had ciliodepressive effects. When added together, fen + iso, dex + iso, and dex+ fen + iso were all cilia inhibitory. In contrast fenl + dex did not significantly alter ciliary function.

Conclusion: We show that ciliary motility is stimulated by fen, but depressed by dex or iso. However, when used in combination, ciliary motility showed changes indicative of complex drug drug and drug temperature interactions not predicted by simple summation of their individual effects. Similar studies are needed to examine the human airway epithelia and its response to anesthetics.

Item ID: 60706
Item Type: Article (Research - C1)
ISSN: 2296-2360
Keywords: ciliary beat frequency, dexmedetomidine, fentanyl, isoflurane, hypothermia
Copyright Information: Copyright © 2014 Christopher, Ochoa, Krushansky, Francis, Tian, Zahid, Muñoz andLo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums ispermitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Date Deposited: 23 Oct 2019 12:36
FoR Codes: 06 BIOLOGICAL SCIENCES > 0606 Physiology > 060602 Animal Physiology - Cell @ 100%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920115 Respiratory System and Diseases (incl. Asthma) @ 100%
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