Sepsis is a life-threatening medical condition.
Salidroside, a substance isolated from Rhodiola rosea, possesses
antioxidant and anti-inflammatory properties. The effect and mechanism of
salidroside on
sepsis-induced
acute lung injury still remains to be well clarified. Here, we investigated the effect and mechanism of
salidroside on septic mouse models and explored the role of
salidroside-upregulated
SIRT1.
Salidroside inhibited the inflammatory responses and
HMGB1 productions in bacterial
lipopolysaccharide (LPS)-treated macrophages and mice.
Salidroside could also reverse the decreased
SIRT1 protein expression in LPS-treated macrophages and mice.
Salidroside also alleviated the
sepsis-induced lung
edema, lipid peroxidation, and histopathological changes and the mortality, and improved the lung PaO2/FiO2 ratio in cecal
ligation and
puncture (CLP)-induced septic mice.
Salidroside significantly decreased the serum TNF-α,
IL-6, NO, and
HMGB1 productions, pulmonary inducible
NO synthase (iNOS) and phosphorylated NF-κB-p65
protein expressions, and pulmonary
HMGB1 nuclear translocation in CLP septic mice. Moreover,
sepsis decreased the
SIRT1 protein expression in the lungs of CLP septic mice.
Salidroside significantly upregulated the
SIRT1 expression and inhibited the inflammatory responses in CLP septic mouse lungs. These results suggest that
salidroside protects against
sepsis-induced
acute lung injury and mortality, which might be through the SIRT1-mediated repression of NF-κB activation and
HMGB1 nucleocytoplasmic translocation.