ZHAO Ruizhu,HUA Zhengyang,WANG Yuhang,et al.Mechanism of Huanglian Jiedutang in Inhibiting Activation of NLRP3 Inflammasomes and Ameliorating Acute Liver Injury in Septic Mice[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(22):27-34.
ZHAO Ruizhu,HUA Zhengyang,WANG Yuhang,et al.Mechanism of Huanglian Jiedutang in Inhibiting Activation of NLRP3 Inflammasomes and Ameliorating Acute Liver Injury in Septic Mice[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(22):27-34.DOI: 10.13422/j.cnki.syfjx.20240838.
Mechanism of Huanglian Jiedutang in Inhibiting Activation of NLRP3 Inflammasomes and Ameliorating Acute Liver Injury in Septic Mice增强出版
To explore the mechanism of Huanglian Jiedutang in inhibiting the pyroptosis mediated by NOD-like receptor protein 3 (NLRP3) inflammasomes and alleviating the acute liver injury (ALI) induced by lipopolysaccharide (LPS) in the mouse model of sepsis.
Method
2
Fifty-four male C57BL/6 mice were randomized into blank, model, low- (3.08 g·kg
-1
), medium- (6.15 g·kg
-1
), and high-dose (12.30 g·kg
-1
) Huanglian Jiedutang, and positive control (dexamethasone) groups (
n
=9). The mice were administrated with Huanglian Jiedutang at different doses by gavage for 7 days, and then LPS (15 mg·kg
-1
) was injected intraperitoneally for the modeling of sepsis. In the positive control group, dexamethasone (0.05 g·kg
-1
) was injected intraperitoneally 1.5 h after modeling, and the mouse sepsis score (MSS) was recorded 12 h after modeling. The mice were sacrificed for the collection of blood and liver tissue samples. The levels of alanine transaminase (ALT) and aspartate transaminase (AST) were measured by a biochemical analyzer. The levels of tumor necrosis factor (TNF)-
α
, interleukin (IL)-6, IL-1
β
, and IL-18 in the serum were measured by enzyme-linked immunosorbent assay kits. Hematoxylin-eosin staining was used to observe the pathological changes in the liver tissue. The content of NLRP3 was observed by the immunofluorescence assay. The expression of apoptosis-associated speck-like protein containing CARD (ASC) was detected by immunohistochemistry. The protein levels of NLRP3, ASC, Caspase-1, and gasdermin D (GSDMD) in the liver tissue were determined by Western blot. Real-time quantitative polymerase chain reaction(Real-time PCR) was employed to determine the mRNA levels of GSDMD, Caspase-1, IL-1
β
, and IL-18.
Result
2
Compared with the blank group, the model group showed elevated levels of ALT and AST (
P
<
0.01) and risen levels of inflammatory cytokines in the serum (
P
<
0.01). In addition, the modeling resulted in edema and necrosis in the liver, and up-regulated the protein levels of GSDMD, NLRP3, ASC, and Caspase-1 (
P
<
0.01) and t
he mRNA levels of GSDMD, Caspase-1, IL-1
β
, and IL-18 (
P
<
0.01). Compared with the model group, the drug intervention groups showed reduced content of inflammatory cytokines (
P
<
0.01), alleviated pathological damage in the liver tissue, and down-regulated protein levels of GSDMD, NLRP3, ASC, and Caspase-1 (
P
<
0.05,
P
<
0.01) and mRNA levels of GSDMD, Caspase-1, IL-1
β
,
and IL-18 (
P
<
0.05,
P
<
0.01) in the liver tissue.
Conclusion
2
Huanglian Jiedutang can inhibit pyroptosis and reduce inflammation by inhibiting the activation of NLRP3 inflammasomes, thus demonstrating a therapeutic effect on acute liver injury in the mouse model of sepsis induced by LPS.
关键词
Keywords
references
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