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Pulmonary inflammatory response and immunomodulation to multiple trauma and hemorrhagic shock in pigs
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Pulmonary inflammatory response and immunomodulation to multiple trauma and hemorrhagic shock in pigs
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Journal Article
Pulmonary inflammatory response and immunomodulation to multiple trauma and hemorrhagic shock in pigs
2022
Overview
Patients suffering from severe trauma experience substantial immunological stress. Lung injury is a known risk factor for the development of posttraumatic complications, but information on the long-term course of the pulmonary inflammatory response and treatment with mild hypothermia are scarce.
To investigate the pulmonary inflammatory response to multiple trauma and hemorrhagic shock in a porcine model of combined trauma and to assess the immunomodulatory properties of mild hypothermia.
Following induction of trauma (blunt chest trauma, liver laceration, tibia fracture), two degrees of hemorrhagic shock (45 and 50%) over 90 (n = 30) and 120 min. (n = 20) were induced. Animals were randomized to hypothermia (33°C) or normothermia (38°C). We evaluated bronchoalveolar lavage (BAL) fluid and tissue levels of cytokines and investigated changes in microRNA- and gene-expression as well as tissue apoptosis.
We observed a significant induction of Interleukin (IL) 1β, IL-6, IL-8, and Cyclooxygenase-2 mRNA in lung tissue. Likewise, an increased IL-6 protein concentration could be detected in BAL-fluid, with a slight decrease of IL-6 protein in animals treated with hypothermia. Lower IL-10 protein levels in normothermia and higher IL-10 protein concentrations in hypothermia accompanied this trend. Tissue apoptosis increased after trauma. However, intervention with hypothermia did not result in a meaningful reduction of pro-inflammatory biomarkers or tissue apoptosis.
We observed signs of a time-dependent pulmonary inflammation and apoptosis at the site of severe trauma, and to a lower extent in the trauma-distant lung. Intervention with mild hypothermia had no considerable effect during 48 hours following trauma.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Animals
/ Blood
/ Bronchus
/ Injuries
/ Lavage
/ Lung
/ Lungs
/ Medicine and Health Sciences
/ miRNA
/ mRNA
/ Multiple organ dysfunction syndrome
/ Multiple Trauma - complications
/ Proteins
/ RNA
/ Shock, Hemorrhagic - therapy
/ Swine
/ Thoracic Injuries - complications
/ Tibia
/ Tissues
/ Trauma
