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Dhanani J, Roberts JA, Monsel A, Torres A, Kollef M, Rouby JJ. Understanding the nebulisation of antibiotics: the key role of lung microdialysis studies. Crit Care 2024; 28:49. [PMID: 38373973 PMCID: PMC10875779 DOI: 10.1186/s13054-024-04828-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 02/10/2024] [Indexed: 02/21/2024] Open
Abstract
BACKGROUND Nebulisation of antibiotics is a promising treatment for ventilator-associated pneumonia (VAP) caused by multidrug-resistant organisms. Ensuring effective antibiotic concentrations at the site of infection in the interstitial space fluid is crucial for clinical outcomes. Current assessment methods, such as epithelial lining fluid and tissue homogenates, have limitations in providing longitudinal pharmacokinetic data. MAIN BODY Lung microdialysis, an invasive research technique predominantly used in animals, involves inserting probes into lung parenchyma to measure antibiotic concentrations in interstitial space fluid. Lung microdialysis offers unique advantages, such as continuous sampling, regional assessment of antibiotic lung concentrations and avoidance of bronchial contamination. However, it also has inherent limitations including the cost of probes and assay development, the need for probe calibration and limited applicability to certain antibiotics. As a research tool in VAP, lung microdialysis necessitates specialist techniques and resource-intensive experimental designs involving large animals undergoing prolonged mechanical ventilation. However, its potential impact on advancing our understanding of nebulised antibiotics for VAP is substantial. The technique may enable the investigation of various factors influencing antibiotic lung pharmacokinetics, including drug types, delivery devices, ventilator settings, interfaces and disease conditions. Combining in vivo pharmacokinetics with in vitro pharmacodynamic simulations can become feasible, providing insights to inform nebulised antibiotic dose optimisation regimens. Specifically, it may aid in understanding and optimising the nebulisation of polymyxins, effective against multidrug-resistant Gram-negative bacteria. Furthermore, lung microdialysis holds promise in exploring novel nebulisation therapies, including repurposed antibiotic formulations, bacteriophages and immunomodulators. The technique's potential to monitor dynamic biochemical changes in pneumonia, such as cytokines, metabolites and inflammation/infection markers, opens avenues for developing theranostic tools tailored to critically ill patients with VAP. CONCLUSION In summary, lung microdialysis can be a potential transformative tool, offering real-time insights into nebulised antibiotic pharmacokinetics. Its potential to inform optimal dosing regimen development based on precise target site concentrations and contribute to development of theranostic tools positions it as key player in advancing treatment strategies for VAP caused by multidrug-resistant organisms. The establishment of international research networks, exemplified by LUMINA (lung microdialysis applied to nebulised antibiotics), signifies a proactive step towards addressing complexities and promoting multicentre experimental studies in the future.
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Affiliation(s)
- Jayesh Dhanani
- Faculty of Medicine, University of Queensland Centre for Clinical Research, Brisbane, Australia.
- Department of Intensive Care Medicine, Royal Brisbane and Women's Hospital, Brisbane, Australia.
| | - Jason A Roberts
- Faculty of Medicine, University of Queensland Centre for Clinical Research, Brisbane, Australia
- Department of Intensive Care Medicine, Royal Brisbane and Women's Hospital, Brisbane, Australia
- Herston Infectious Diseases Institute (HeIDI), Metro North Health, Brisbane, Australia
- Division of Anaesthesiology Critical Care Emergency and Pain Medicine, Nîmes University Hospital, University of Montpellier, Nîmes, France
| | - Antoine Monsel
- Unité Mixte de Recherche (UMR)-S 959, Immunology-Immunopathology-Immunotherapy, Paris, Institut National de la Santé et de la Recherche Médicale (INSERM), Hôpital Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
- Sorbonne University, GRC 29, Assistance Publique Hôpitaux de Paris (AP-HP), DMU DREAM, Multidisciplinary Intensive Care Unit, Department of Anaesthesiology and Critical Care, Pitié-Salpêtrière Hospital, Paris, France
| | - Antoni Torres
- Department of Pneumology, Institut Clinic del Tórax, Hospital Clinic of Barcelona - Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), SGR 911- Ciber de Enfermedades Respiratorias (Ciberes), University of Barcelona, Barcelona, Spain
| | - Marin Kollef
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Jean-Jacques Rouby
- Sorbonne University, GRC 29, Assistance Publique Hôpitaux de Paris (AP-HP), DMU DREAM, Multidisciplinary Intensive Care Unit, Department of Anaesthesiology and Critical Care, Pitié-Salpêtrière Hospital, Paris, France
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