TY - JOUR
T1 - Hydroxyethyl starch reduces high stretch ventilation-augmented lung injury via vascular endothelial growth factor
AU - Li, Li Fu
AU - Huang, Chung Chi
AU - Liu, Yung Yang
AU - Lin, Horng Chyuan
AU - Kao, Kuo Chin
AU - Yang, Cheng Ta
AU - Liao, Shuen Kuei
PY - 2011/5
Y1 - 2011/5
N2 - Disruption of epithelial and endothelial barriers found in patients with acute lung injury often results in the need for the support of mechanical ventilation. High tidal volume (VT) mechanical ventilation can increase lung damage through lung inflammation, but the mechanisms are unclear. We hypothesized that a colloid supply with hydroxyethyl starch would decrease neutrophil infiltration, lung edema, and vascular endothelial growth factor (VEGF) production in mice exposed to high VT mechanical ventilation. Male C57BL/6 mice, weighing 20 g to 25 g, were exposed to high VT (30 mL/kg) mechanical ventilation with room air for 1 h to 5 h and infused with 15 mL/kg/h normal saline or hydroxyethyl starch intravenously at the beginning and every 30 min during ventilation. Evans blue dye, lung wet-to-dry weight ratio, histopathologic grading of lung tissue, myeloperoxidase, and inflammatory cytokine were measured to establish the extent of lung injury. Knockdown of VEGF by short interfering RNA (siRNA) was used to explore the role of VEGF. High VT ventilation induced the increases of microvascular permeability, neutrophil influx, expressions of VEGF mRNA and VEGF, production of VEGF protein, positive staining of VEGF in epithelium, and apoptotic epithelial cell death. Lung injury induced by high VT ventilation was attenuated with the supply of hydroxyethyl starch and pharmacologic inhibition of VEGF expression by siRNA. We conclude that hydroxyethyl starch reduces high V T mechanical ventilation-induced lung injury and neutrophil infiltration through an inhibition of VEGF expression.
AB - Disruption of epithelial and endothelial barriers found in patients with acute lung injury often results in the need for the support of mechanical ventilation. High tidal volume (VT) mechanical ventilation can increase lung damage through lung inflammation, but the mechanisms are unclear. We hypothesized that a colloid supply with hydroxyethyl starch would decrease neutrophil infiltration, lung edema, and vascular endothelial growth factor (VEGF) production in mice exposed to high VT mechanical ventilation. Male C57BL/6 mice, weighing 20 g to 25 g, were exposed to high VT (30 mL/kg) mechanical ventilation with room air for 1 h to 5 h and infused with 15 mL/kg/h normal saline or hydroxyethyl starch intravenously at the beginning and every 30 min during ventilation. Evans blue dye, lung wet-to-dry weight ratio, histopathologic grading of lung tissue, myeloperoxidase, and inflammatory cytokine were measured to establish the extent of lung injury. Knockdown of VEGF by short interfering RNA (siRNA) was used to explore the role of VEGF. High VT ventilation induced the increases of microvascular permeability, neutrophil influx, expressions of VEGF mRNA and VEGF, production of VEGF protein, positive staining of VEGF in epithelium, and apoptotic epithelial cell death. Lung injury induced by high VT ventilation was attenuated with the supply of hydroxyethyl starch and pharmacologic inhibition of VEGF expression by siRNA. We conclude that hydroxyethyl starch reduces high V T mechanical ventilation-induced lung injury and neutrophil infiltration through an inhibition of VEGF expression.
UR - http://www.scopus.com/inward/record.url?scp=79954490754&partnerID=8YFLogxK
U2 - 10.1016/j.trsl.2010.12.009
DO - 10.1016/j.trsl.2010.12.009
M3 - 文章
C2 - 21497777
AN - SCOPUS:79954490754
SN - 1931-5244
VL - 157
SP - 293
EP - 305
JO - Translational Research
JF - Translational Research
IS - 5
ER -