Laboratory Medicine ›› 2021, Vol. 36 ›› Issue (5): 504-509.DOI: 10.3969/j.issn.1673-8640.2021.05.009

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Influence of intestinal flora on serum inflammatory factors in patients with chronic urticaria

REN Yuan1, ZHANG Min2, YIN Xiang3, ZENG Qianwen4()   

  1. 1. Plastic Surgery,Army Characteristic Medical Center(Daping Hospital),Chongqing 400042,China
    2. Department of Dermatology,the First Affiliated Hospital of Army Military Medical University,Chongqing 400038,China
    3. Spine Surgery,Army Characteristic Medical Center(Daping Hospital),Chongqing 400042,China
    4. Department of Dermatology,Army Characteristic Medical Center (Daping Hospital),Chongqing 400042,China
  • Received:2020-03-18 Online:2021-05-30 Published:2021-05-30
  • Contact: ZENG Qianwen

Abstract:

Objective To investigate the influence of intestinal flora on serum inflammatory factors in patients with chronic urticaria. Methods Totally,60 patients with chronic urticaria and 60 healthy subjects were enrolled,and fasting venous blood and stool samples were collected. Gene 16S rDNA real-time fluorescence quantitative polymerase chain reaction(PCR) was used to determine the levels of Faecalibacterium prausnitzii,Clostridium leptum,Bifidobacterium and Lactobacillus. Gas chromatography was used to determine intestinal short chain fatty acid. Serum Toll-like receptor 4(TLR4),nuclear factor(NF)-κB,tumor necrosis factor-alpha(TNF-α) and interleukin-6(IL-6) were determined by enzyme-linked immunosorbent assay(ELISA). Spearman correlation analysis was used to analyze the relationship between intestinal flora,short chain fatty acid and serum TLR4,NF-κB,TNF-α and IL-6. Results Compared with the control group,the levels of Faecalibacterium prausnitzii,Clostridium leptum,Lactobacillus and butyric acid in the intestine of patients with chronic urticaria were decreased(P<0.05). Serum TLR4,NF-κB,TNF-α and IL-6 levels were increased(P<0.05). Correlation analysis showed that Faecalibacterium prausnitzii,Clostridium leptum,Lactobacillus and butyric acid were negatively correlated with serum TLR4,NF-κB,TNF-α and IL-6(P<0.05). Conclusions The increase of serum inflammatory factors in patients with chronic urticaria may be related to the decrease of intestinal butyric acid-producing bacteria,leading to a decrease in intestinal butyric acid levels and up-regulation of TLR4/NF-κB signaling pathway.

Key words: Intestinal flora, Short chain fatty acid, Toll-like receptor 4, Tumor necrosis factor-alpha, Interleukin-6, Chronic urticaria

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