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Recombinant plasma gelsolin infusion attenuates burn-induced pulmonary microvascular dysfunction
Patricia A Rothenbach1, Benny Dahl, Jason J Schwartz
1Department of Surgery, University of Texas Sourthwestern Medical School and the Vererans Affairs North Texas Health Care System, Dallas, TX 75216, USA. rturna@lsuhsc.edu
Summary
Plasma gelsolin levels drop significantly after burn injury, contributing to lung injury. Supplementing with gelsolin can prevent this pulmonary microvascular dysfunction, offering a potential therapeutic strategy.
Area of Science:
- Biochemistry
- Physiology
- Trauma Research
Background:
- Reduced plasma gelsolin and Gc-globulin correlate with human pulmonary failure post-injury.
- Plasma gelsolin is an extracellular actin-binding protein with a potential role in inflammatory responses.
Purpose of the Study:
- To investigate the role of plasma gelsolin in the pathophysiology of inflammation-induced lung injury.
- To determine if plasma gelsolin levels decrease early after burn injury.
- To assess if intravenous gelsolin infusion prevents burn-induced pulmonary microvascular dysfunction.
Main Methods:
- Adult Sprague-Dawley rats underwent thermal injury (Burn) or sham procedures.
- Plasma gelsolin and Gc-globulin concentrations were measured via Western blotting.
- Pulmonary microvascular permeability was assessed using an isolated, perfused lung model after gelsolin or albumin administration.
Main Results:
- Burn-injured rats showed a rapid decrease in plasma gelsolin to 10% of normal levels within 12 hours, persisting for 6 days.
- Gc-globulin levels also decreased, but transiently and to a lesser extent.
- Intravenous recombinant human gelsolin administration prevented the burn-induced increase in pulmonary microvascular permeability.
Conclusions:
- Plasma gelsolin depletion is implicated in the pathophysiology of pulmonary microvascular dysfunction following burn injury.
- Gelsolin infusion demonstrates a protective effect against burn-induced lung injury.
- These findings support the therapeutic potential of gelsolin in managing inflammatory lung injury.