REN Qiu-yue,YAO Rong-fei,YANG Rong-lu,et al.Mechanism of Didangtang Against Inflammatory Cascade Triggered by Foam Cell Pyroptosis in High-glucose Environment[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(11):8-15.
REN Qiu-yue,YAO Rong-fei,YANG Rong-lu,et al.Mechanism of Didangtang Against Inflammatory Cascade Triggered by Foam Cell Pyroptosis in High-glucose Environment[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(11):8-15. DOI: 10.13422/j.cnki.syfjx.20220604.
Mechanism of Didangtang Against Inflammatory Cascade Triggered by Foam Cell Pyroptosis in High-glucose Environment
To explore the mechanism of Didangtang (DDT) against the inflammatory cascade triggered by foam cell pyroptosis in high-glucose environment.
Method
2
Oxidized low density lipoprotein (ox-LDL, 100 mg·L
-1
) was used to induce pyroptosis of foam cells. The control group (5.5 mmol·L
-1
glucose), foam cell group (100 mg·L
-1
ox-LDL), high-glucose group (33.3 mmol·L
-1
glucose), DDT group (10% DDT-containing serum), and NOD-like receptor family pyrin domain-containing 3 (NLRP3) inhibitor group (MCC950, 10 nmmol·L
-1
) were designed. The cell membrane damage was observed by lactate dehydrogenase (LDH) release assay. The expression of cysteinyl aspartate-specific proteinase-1 (Caspase-1) was detected by immunofluorescence method, and expression of key proteins NLRP3, Caspase-1, gastermin D (GSDMD), interleukin-1
β
(IL-1
β
), and interleukin-18 (IL-18) in the pyroptosis pathway was determined by Western blot. The release of IL-18 and IL-1
β
, monocyte chemoattractant protein-1 (MCP-1), and tumor necrosis factor
α
(TNF-
α
) in cell supernatant was measured by enzyme-linked immunosorbent assay (ELISA).
Result
2
The expression of NLRP3, Caspase-1, and GSDMD was up-regulated (
P
<
0.01) and the release of IL-1
β
, IL-18, MCP-1, IL-1
α
, and TNF-
α
was increased (
P
<
0.01) in foam cell group compared with those in the control group. The expression of NLRP3, Caspase-1, and GSDMD was higher (
P
<
0.01) and the release of inflammatory factors was more (
P
<
0.01) in the high-glucose group than in the foam cell group. DDT and MCC950 can inhibit expression of NLRP3, Caspase-1, GSDMD and reduce the release of IL-1
β
, IL-18, MCP-1, IL-1
α
, and TNF-
α
.
Conclusion
2
DDT can suppress the pyroptosis of foam cells induced by NLRP3/Caspase-1 pathway in high-glucose environment and thereby alleviate the inflammatory cascade.
关键词
Keywords
references
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