Title : Prevention of D-GalN/LPS-induced ALI by 18β-glycyrrhetinic acid through PXR-mediated inhibition of autophagy degradation.

Pub. Date : 2021 May 13

PMID : 33986260






9 Functional Relationships(s)
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1 We hypothesized that GA significantly alleivates D-GalN/LPS-induced ALI, which involved in PXR-mediated autophagy and lysosome biogenesis. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus
2 Simultaneously, GA markedly activates PXR, even reversing the D-GalN/LPS-induced reduction of PXR and its downstream genes. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus
3 Simultaneously, GA markedly activates PXR, even reversing the D-GalN/LPS-induced reduction of PXR and its downstream genes. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus
4 In contrast, GA has a weak protective effect in pharmacological inhibition of PXR and PXR-null mice, which significantly affected apoptosis- and autophagy-related genes. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus
5 In contrast, GA has a weak protective effect in pharmacological inhibition of PXR and PXR-null mice, which significantly affected apoptosis- and autophagy-related genes. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus
6 PXR knockout interferes with the stability of autophagosomes and lysosomes, preventing GA reducing the expression of lysosomal genes such as Cst B and TPP1, and suppressing autophagy flow. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus
7 Therefore, we believe that GA increases autophagy by inhibiting autophagosome-lysosome fusion and blocked autophagy flux via activation of PXR. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus
8 In conclusion, our results show that GA activates PXR to regulate autophagy and lysosome biogenesis, represented by inhibiting autophagosome-lysosome fusion and stabilization of lysosome. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus
9 These results identify a new mechanism by which GA-dependent PXR activation reduces D-GalN/LPS-induced acute liver injury. 18alpha-glycyrrhetinic acid nuclear receptor subfamily 1, group I, member 2 Mus musculus