Abstract
Ginsenoside Rd is a protopanaxadiol abundant in Panax ginseng and Panax notoginseng. It has been reported that ginsenoside Rd possesses various health benefits, such as anti-diabetic, anti-tumor and anti-inflammatory. This work explored the effects of ginsenoside Rd on hyperglycemia and gut microbiota in streptozotocin-induced diabetic rats. Results showed that 5-week ginsenoside Rd (20 mg/kg) treatment significantly improved hyperglycemia in diabetic rats. Besides, ginsenoside Rd promoted glycogen synthesis via activating Akt pathway. It also inhibited hepatic gluconeogenesis, which was associated with inhibiting phosphoenolpyruvate carboxykinase and glucose-6-phosphatase. We further found that ginsenoside Rd treatment increased the diversity of gut microbiota, increased the abundance of beneficial bacteria, such as SMB53, rc4-4 and Ruminococcus, and reduced the abundance of conditional pathogenic bacteria. These results indicated that ginsenoside Rd has the potential for diabetic intervention.
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