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Published on: February 26, 2017
MUC5AC concentrations in lung lavage fluids are associated with acute lung injury after cardiac surgery
Judith van Paassen1, Pieter S Hiemstra2, Abraham C van der Linden2
1Department of Intensive Care, Leiden University Medical Center, Albinusdreef 2, Leiden, B4-57, 2333 ZA, the Netherlands. j.van_paassen@lumc.nl.
Abstract:
Heart surgery may be complicated by acute lung injury and adult respiratory distress syndrome. Expression and release of mucins MUC5AC and MUC5B in the lungs has been reported to be increased in acute lung injury. The aim of our study was to [1] investigate the perioperative changes of MUC5AC, MUC5B and other biomarkers in mini-bronchoalveolar lavage (minBAL), and [2] relate these to clinical outcomes after cardiac surgery. In this prospective cohort study in 49 adult cardiac surgery patients pre- and post-surgery non-fiberscopic miniBAL fluids were analysed for MUC5AC, MUC5B, IL-8, human neutrophil elastase, and neutrophils. All measured biomarkers increased after surgery. Perioperative MUC5AC-change showed a significant negative association with postoperative P/F ratio (p = 0.018), and a positive association with ICU stay (p = 0.027). In conclusion, development of lung injury after cardiac surgery and prolonged ICU stay are associated with an early increase of MUC5AC as detected in mini-BAL.
Insights
Increased mucins MUC5AC and MUC5B in the lungs after cardiac surgery are linked to acute lung injury and longer intensive care unit (ICU) stays. Early detection of MUC5AC in mini-bronchoalveolar lavage may predict complications.
Area of Science:
- Pulmonary medicine
- Critical care medicine
- Biomarker research
Background:
- Acute lung injury (ALI) and adult respiratory distress syndrome (ARDS) are significant complications following cardiac surgery.
- Elevated expression of mucins MUC5AC and MUC5B has been observed in ALI.
- This study investigates perioperative changes in mucins and other biomarkers in mini-bronchoalveolar lavage (minBAL) after cardiac surgery.
Discussion:
- Perioperative analysis of minBAL fluid revealed increased levels of MUC5AC, MUC5B, IL-8, human neutrophil elastase, and neutrophils post-surgery.
- A significant negative association was found between perioperative MUC5AC change and postoperative P/F ratio (p=0.018).
- A positive association was observed between perioperative MUC5AC change and intensive care unit (ICU) stay (p=0.027).
Key Insights:
- Early perioperative increase in MUC5AC in minBAL is associated with poorer lung function (lower P/F ratio) after cardiac surgery.
- Elevated MUC5AC levels correlate with prolonged ICU admission, suggesting a role in post-cardiac surgery lung injury.
- These findings highlight MUC5AC as a potential early biomarker for lung complications in cardiac surgery patients.
Outlook:
- Further research could explore therapeutic strategies targeting MUC5AC to mitigate lung injury post-cardiac surgery.
- Investigating the precise mechanisms linking MUC5AC to lung injury and prolonged ICU stay is warranted.
- Validation of MUC5AC as a predictive biomarker in larger cohorts could improve patient management and outcomes.
