Journal of Capital Medical University ›› 2022, Vol. 43 ›› Issue (6): 893-898.doi: 10.3969/j.issn.1006-7795.2022.06.012

• New Progress of Rhinology Research • Previous Articles     Next Articles

Effect of baicalin on lipopolysaccharide-stimulated inflammatory response in human monocytes THP-1

Wang Ping1,2, Yang Jun1,2, Wang Xiangdong1,2, Zhang Luo1,2,3*   

  1. 1. Department of Otorhinolaryngology Head and Neck Surgery and Allergy, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China;
    2. Beijing Institute of Otorhinolaryngology, Beijing 100005, China;
    3. Research Unit of Diagnosis and Treatment of Chronic Nasal Diseases, Chinese Academy of Medical Sciences, Beijing 100005, China
  • Received:2022-09-06 Online:2022-12-21 Published:2022-11-30
  • Contact: *E-mail:dr.luozhang@139.com

Abstract: Objective To observe the effect of baicalin on the lipopolysaccharide (LPS)-stimulated inflammatory response in human monocytes THP-1. Methods LPS was used to induce the inflammatory response of human monocyte THP-1, and the relative expression levels of interleukin-1β (IL-1β), IL-6, IL-8, granulocyte-macrophage colony-stimulating factor (GM-CSF) and tumor necrosis factor-α (TNF-α) were detected by real-time quantitative polymerase chain reaction (RT-qPCR) method to optimize the stimulation concentration of LPS.The cytotoxic effects of baicalein were also detected using the lactate dehydrogenase assay kit to optimize the bacailin concentration. The LPS-induced inflammation model of human monocyte THP-1 was pretreated with baicalin at different concentrations, and the inhibition effect of baicalin on the increasing expression of IL-1β, IL-6, IL-8, GM-CSF and TNF-α induced by LPS was examined by RT-qPCR. Results Compared to the control, the LPS treatment of human monocytes THP-1 at 1 μg/mL for 24 h could significantly increase the expression of IL-1β, IL-6, IL-8, GM-CSF and TNF-α (P<0.05).Treatment with baicalin at 10, 30 and 100 μmol/L on human monocytes THP-1 for 24 h and 48 h showed no significant cell cytotoxicity. The baicalein at 30 μmol/L and 100 μmol/L could significantly inhibit the LPS-induced increasing expression of IL-1β, IL-6, IL-8, GM-CSF and TNF-α in human monocytes THP-1. Conclusion The baicalin could significantly inhibit LPS-induced inflammatory response in human monocytes THP-1.

Key words: baicalin, lipopolysaccharide, human monocytes, inflammatory response, cytokine

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