GAO Jingmiao,WANG Tingting,BIAO Yaning,et al.Broussonetiae Fructus Protects Against APAP-induced Liver Injury in Mice by Inhibiting Endoplasmic Reticulum Stress Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(16):66-73.
GAO Jingmiao,WANG Tingting,BIAO Yaning,et al.Broussonetiae Fructus Protects Against APAP-induced Liver Injury in Mice by Inhibiting Endoplasmic Reticulum Stress Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(16):66-73. DOI: 10.13422/j.cnki.syfjx.20221544.
Broussonetiae Fructus Protects Against APAP-induced Liver Injury in Mice by Inhibiting Endoplasmic Reticulum Stress Pathway
To explore the mechanism of Broussonetiae Fructus (BF) in preventing and treating drug-induced liver injury (DILI) induced by acetaminophen (APAP) through the endoplasmic reticulum stress pathway.
Method
2
Sixty C57BL/6N mice were randomly divided into normal group, model group, silybin group (3.4 g·kg
-1
), and high-, medium- and low-dose BF groups (3.0, 1.5, 0.75 g·kg
-1
), with 10 mice in each group. The DILI model was induced by intragastric administration of APAP at 800 mg·kg
-1
, and drugs were administered simultaneously for 10 consecutive days. The serum contents or activities of alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin (TBIL), and direct bilirubin (DBIL) were measured. Hematoxylin-eosin(HE) staining was performed to observe the pathological changes in liver tissues. The morphological changes in liver mitochondria were observed by transmission electron microscopy. The activities or content of superoxide dismutase (SOD), malondialdehyde (MDA), total antioxidant capacity (T-AOC), glutathione (GSH), glutathione disulfide (GSSG), glutathione peroxidase (GSH-Px), and adenosine triphosphate (ATP) in the serum and liver tissues were detected by the colorimetric method. The expression of reactive oxygen species (ROS) in liver tissues was detected by immunofluorescence. The gene expression of glucose-regulated protein 78 (GRP78), CCAAT/enhancer-binding protein homologous protein (CHOP), and c-Jun N-terminal kinase (JNK) in liver tissues was detected by Real-time quantitative polymerase chain reaction (PCR).
Result
2
Compared with the normal group, the model group showed increased serum activities or content of ALT, AST, TBIL, and DBIL (
P
<
0.01), increased MDA and GSSG contents (
P
<
0.01), decreased contents or activities of SOD, T-AOC, GSH, GSH-Px, and ATP (
P
<
0.01), swollen hepatocytes with inflammatory infiltration and lamellar necrosis, swollen and broken mitochondria of hepatocytes, and increased mRNA expression of GRP78, CHOP, and JNK (
P
<
0.01). Compared with the model group, the groups with drug intervention showed decreased serum content or activities of ALT, AST, TBIL, and DBIL (
P
<
0.05,
P
<
0.01), reduced MDA and GSSG contents(
P
<
0.05,
P
<
0.01), and increased contents or activities of SOD, T-AOC, GSH, GSH-Px, and ATP (
P
<
0.05,
P
<
0.01), improved swollen hepatocytes, inflammatory infiltration, and lamellar necrosis, recovered bilayer membrane structure in mitochondria of hepatocytes, and decreased mRNA expression of GRP78, CHOP, and JNK (
P
<
0.05,
P
<
0.01).
Conclusion
2
BF has preventive and therapeutic effects on APAP-induced DILI mice, and the mechanism may be related to the reduction of endoplasmic reticulum stress and oxidative stress level
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