Open AccessEffects of Ketamine on Icam‐1 Expression during Lipopolysaccharide Induced Acute Lung Injury in Rats
Author(s) -
Hong S,
Kim J,
Jeong S,
Park K,
Song D,
Baik T,
Kim J,
Cho B,
Lee S
Publication year - 2011
Publication title -
hong kong journal of emergency medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 12
eISSN - 2309-5407
pISSN - 1024-9079
DOI - 10.1177/102490791101800605
Subject(s) - bronchoalveolar lavage , medicine , ketamine , lipopolysaccharide , icam 1 , saline , intraperitoneal injection , lung , intercellular adhesion molecule 1 , pharmacology , anesthesia , inflammation , cell adhesion molecule , immunology
Intercellular adhesion molecule‐1 (ICAM‐1) serves very important roles in lung injury, and increases in ICAM‐1 are associated with severity of lung injury. We intended to examine whether ketamine could have favourable effects on ICAM‐1 expression in lipopolysaccharide (LPS)‐induced acute lung injury in the rat. Methods The acute lung injury was induced by instilling LPS into the tracheas of 72 anaesthetised rats. The animals were divided into four groups including a sham group with intratracheal saline, an LPS group with intratracheal LPS and intraperitoneal saline, and two ketamine treatment groups with intratracheal LPS and treated with 1 mg/kg or 10 mg/kg doses of intraperitoneal ketamine hydrochloride. Half of the animals were sacrificed at three hours and the remaining animals were sacrificed at six hours. Real time PCR was performed on the lung tissues obtained. Concentration of the soluble ICAM‐1 was measured in the bronchoalveolar lavage fluid. Expression of ICAM‐1 was measured. Results The transcriptional activity of ICAM‐1 mRNA increased 9.92 fold in the LPS group compared to the sham group but decreased by 84.1% and 83.3%, respectively, in the 1 and 10 mg/kg ketamine treatment groups. The concentration of soluble ICAM‐1 in bronchoalveolar lavage fluid increased 2.23 fold in the LPS group compared to the sham group while decreasing by 75.0% and 74.5% respectively in the 1 mg/kg and 10 mg/kg ketamine treatment groups. The intensity of immunohistochemical staining for ICAM‐1 was also decreased in both ketamine treatment groups. Conclusion Ketamine attenuates ICAM‐1 expression during acute lung injury in rats. (Hong Kong j.emerg.med. 2011;18:397‐405)