INTERLEUKIN J Biomechanics 110319 inc Figs.pdf (473.02 kB)
Download file

An in vitro investigation of the inflammatory response to the strain amplitudes which occur during high frequency oscillation ventilation and conventional mechanical ventilation.

Download (473.02 kB)
journal contribution
posted on 26.04.2019, 14:05 by C Harris, SD Thorpe, S Rushwan, W Wang, CL Thompson, JL Peacock, MM Knight, B Gooptu, A Greenough
Children randomised in the neonatal period to high frequency oscillatory ventilation (HFOV) or conventional mechanical ventilation (CMV) in the United Kingdom Oscillation study (UKOS) had superior lung function at 11 to 14 years of age. During HFOV, much smaller tidal volumes, but a higher mean airway distending pressure is delivered, hence, a possible explanation for a volume dependent effect on long term lung function could be an increase in inflammation in response to higher tidal volumes and strains. We tested that hypothesis by assessing interleukin-6 (IL-6) and -8 (IL-8) release from A549 alveolar analogue cells following biaxial mechanical strain applied at 0.5 Hz occurring during conditions mimicking strain during CMV (5-20% strain) and conditions mimicking strain during HFOV (17.5% ± 2.5% strain) for up to 4 h. Cyclic strain of 5-20%, occurring during CMV, increased levels of both IL-6 and IL-8 compared to unstrained controls, while 17.5% ± 2.5% strain, occurring during HFOV, was associated with significantly lower levels of IL-6 (46.31 ± 2.66 versus 56.79 ± 3.73 pg/mL) and IL-8 (1340.2 ± 74.9 versus 2522 ± 248 pg/mL) secretion compared to conditions occurring during CMV at four hours. These results may provide a possible explanation for the superior lung function in 11-14-year-old children who had been supported in the neonatal period by HFOV.

Funding

The research was supported by the National Institute for Health Research (NIHR) Biomedical Research Centre based at Guy’s and St Thomas’ NHS Foundation Trust and King’s College London.

History

Citation

Journal of Biomechanics, 2019

Author affiliation

/Organisation/COLLEGE OF LIFE SCIENCES/School of Medicine/Department of Infection, Immunity and Inflammation

Version

AM (Accepted Manuscript)

Published in

Journal of Biomechanics

Publisher

Elsevier, American Society of Biomechanics, Australian and New Zealand Society of Biomechanics, European Society of Biomechanics, International Society of Biomechanics, Japanese Society for Clinical Biomechanics and Related Research

eissn

1873-2380

Acceptance date

13/03/2019

Copyright date

2019

Publisher version

https://www.sciencedirect.com/science/article/pii/S0021929019302040?via=ihub

Notes

The file associated with this record is under embargo until 12 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.

Language

en