2,3,5,4'-tetrahydroxystilbene-2-O-β-D-glucoside induces autophagy of liver by activating PI3K/Akt and Erk pathway in prediabetic rats.

Abstract

BACKGROUND:

2,3,5,4'-tetrahydroxystilbene-2-O-β-D-glucoside (TSG) is an active compound derived from Polygonum multiflorum Thunb., a Chinese Taoist herbal medicine, which exerts lipid lowering, anti-cancer, anti-aging, anti-inflammatory and hepatoprotective effects. However, its role in protecting hepatocytes under pre-diabetic condition remains unclear.

METHODS:

In this study, we developed prediabetic SD rats by feeding high-fat and high-sugar diet. The body weight, blood lipid, blood glucose, and fasting insulin (FINS) and insulin resistance index (HOMA-IR) were detected and calculated to assess the potential risk of prediabetes. HE and Oil Red O staining was used, and blood level of biochemical index was detected to observe the liver injury. The autophagic cell death-associated signaling proteins, and the potential signaling factors p-Akt/Akt and p-Erk/Erk were detected using western blot to explore the potential effects of TSG on pre-diabetic liver and the underlying mechanisms.

RESULTS:

The results showed that the body weight in TSG-treated group was significantly decreased vs. the model group. The blood glucose, the level of FINS and HOMA-IR, TC and TG were decreased in TSG-treated group as well. Furthermore, TSG treatment significantly ameliorated lipid droplet accumulation, enhanced liver anti-oxidative response which may be associated with an increased activity of SOD and GSH-Px, and a decrease of LDLC and MDA. The autophagic cell death-associated proteins, p-AMPK, ATG12, LC3 II, and Beclin 1 were up-regulated in the TSG-treated group, while the upstream signaling pathway, PI3K/Akt and Erk, were activated.

CONCLUSIONS:

TSG induced liver autophagic cell death to protect liver from prediabetic injury by activating PI3K/Akt and Erk.

• Authors: Xuanbin Wang, Jing Zeng, Xiao Wang, Ju Li, Jin Chen, Ning Wang, Miao Zhang, Yibin Feng, Huailan Guo
• Journal: BMC complementary medicine and therapies (BMC Complement Med Ther) Vol. 20 Issue 1 Pg. 177 (Jun 08 2020) ISSN: 2662-7671 [Electronic] England
• PMID: 32513151 (Publication Type: Journal Article)

Chemical References

• Glucosides
• Stilbenes
• 2,3,5,4'-tetrahydroxystilbene 2-O-glucopyranoside
• Proto-Oncogene Proteins c-akt

Topics

• Animals
• Autophagy (drug effects)
• Fallopia multiflora (chemistry)
• Glucosides (pharmacology)
• Liver (drug effects)
• MAP Kinase Signaling System (drug effects)
• Male
• Molecular Structure
• Phosphatidylinositol 3-Kinases (metabolism)
• Prediabetic State (drug therapy)
• Proto-Oncogene Proteins c-akt (metabolism)
• Rats
• Rats, Sprague-Dawley
• Stilbenes (pharmacology)