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Lab Anim Res. 2018 Sep;34(3):92-100. doi: 10.5625/lar.2018.34.3.92. Epub 2018 Sep 27.

Protective effect of water extract of guibi-tang against pulmonary inflammation induced by cigarette smoke and lipopolysaccharide.

Author information

1
College of Veterinary Medicine (BK21 Plus Project Team), Chonnam National University, Gwangju, Korea.
2
K-herb Research Center, Korea Institute of Oriental Medicine, Daejeon, Korea.

Abstract

Water extract of guibi-tang (GB), a traditional Chinese, Japanese, and Korean herbal medicine, is used to treat memory impairment, insomnia, and peptic ulcers. The aim of this study was to investigate the protective effects of GB on pulmonary inflammation induced by cigarette smoke (CS) and lipopolysaccharide (LPS). C57BL/6 mice were used to develop a pulmonary inflammation model by exposing them to CS for 1 h per day for 7 days. LPS was intranasally administered to mice under mild anesthesia on day 5. GB was administered 1 h before CS exposure at doses of 50 or 100 mg/kg for 7 days. Our results showed that GB suppressed the CS and LPS induced elevation in inflammatory cell counts in the bronchoalveolar lavage fluid (BALF), with significant reductions in protein, tumor necrosis factor (TNF)-α, and interleukin (IL)-6 levels. Histological studies revealed that GB decreased the inflammatory cell infiltration into lung tissue caused by CS- and LPS-exposure. GB also significantly decreased the CS and LPS-induced expression of inducible nitric oxide synthase (iNOS) in the lung tissue. Taken together, GB effectively attenuated airway inflammation caused by CS and LPS. These results indicate that GB is a potential therapeutic herbal formula for pulmonary inflammatory disease.

KEYWORDS:

Guibi-water extract; airway inflammation; cigarette smoke; inducible nitric oxide synthase

Conflict of interest statement

Conflict of interests: The authors declare that there is no financial conflict of interests to publish these results.

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