Delphinidin 3-O-β-rutinoside chloride

29372310

Purpose: Increasing evidence suggests the potential use of natural antioxidant compounds in the prevention/treatment of osteoporosis. This study was undertaken to investigate the effects of purified delphinidin-3-rutinoside (D3R), isolated from Solanum melongena L., on osteoblast viability and differentiation in basal conditions and its ability to protect MC3T3-E1 cells against oxidative damage induced by tert-butyl hydroperoxide (t-BHP). Methods: MC3T3-E1 osteoblastic cells were treated with D3R (10-11-10-5 M for 24 h), followed by treatment with t-BHP (250 ?M for 3 h). To test cell viability, MTT test was performed. Apoptotic cells were stained with Hoechst-33258 dye. Cytoskeleton rearrangement was stained with FICT-labelled phalloidin. Intracellular ROS production was measured using dichlorofluorescein CM-DCFA. The reduced glutathione to oxidized glutathione ratio (GSH/GSSG) contents was measured according to the OPT fluorimetric assay. Results: D3R (10-9 M) significantly increases viability of MC3T3-E1 cells and promotes osteoblast differentiation by increasing the expression of type I collagen, alkaline phosphatase and osteocalcin. Pre-treatment with D3R (10-9 M) significantly prevented t-BHP-induced osteoblastic dysfunction and changes in the cytoskeleton organization by decreasing intracellular ROS and preventing the reduction in GSH/GSSG. D3R did not significantly modify the expression of Osteoprotegerin/RANKL system activated by t-BHP suggesting a lack of effect of D3R on osteoblast/osteoclast crosstalk. D3R protective effects against t-BHP-induced osteoblastic dysfunction were mediated by the PI3K/Akt pathway since they were completely prevented by LY294002, a PI3K/Akt specific inhibitor. Conclusions: These findings indicate that D3R protects MC3T3-E1 cells from oxidative damage and suggest the potential utility of dietary D3R supplement to prevent osteoblast dysfunction in age-related osteoporosis.

Delphinidin-3-rutinoside; Functional food component; Osteoblastic MC3T3-E1 cells; Oxidative stress.

Potential of delphinidin-3-rutinoside extracted from Solanum melongena L. as promoter of osteoblastic MC3T3-E1 function and antagonist of oxidative damage

Lavinia Casati 1, Francesca Pagani 1, Marta Fibiani 2, Roberto Lo Scalzo 2, Valeria Sibilia 3

2019 Apr;

25442541

In this study, we compared the scavenging ROS of anthocyanins from Chinese eggplant var. Niu Jiao Qie and other delphinidin derivatives with different glycosylation patterns in HT-29 and HCT-116 cell lines. The eggplant anthocyanins were isolated and identified using LC-MSn and (1)H/(13)C NMR as delphinidin-3-[(4"-trans-p-coumaroyl)-rhamnosyl (1 → 6)glucoside]-5-glucoside, also known as nasunin. Delphinidin derivatives with glycosylation only on C3 (delphinidin-3-glucoside, 3-sambubioside, or 3-rutinoside) exhibited greater effects on ROS reduction as compared to delphinidin derivatives that have glycosylation on C3 and C5 (delphinidin-3,5-diglucoside>delphinidin-3-rutinoside-5-glucoside). Nasunin has glycosylation on C3 and C5 and an acyl group (p-coumaric acid), demonstrated the least effect on ROS reduction. Meanwhile, their ROS reduction activities were consistent with glutathione reductase protein expression levels in HT-29. Although not potent in ROS reduction, nasunin and its deacylated derivatives protected cells from DNA damage in a dose-dependent manner. Taken together, our results suggest that the anthocyanins isolated from Chinese eggplant var. Niu Jiao Qie and other delphinidin have antioxidant activities in colon cancer cells and also protect cells from DNA damage.

Antioxidants; Delphinidin derivatives; Glycosylation; HCT-116; HT-29.

Effect of glycosylation patterns of Chinese eggplant anthocyanins and other derivatives on antioxidant effectiveness in human colon cell lines

Pu Jing 1, Bingjun Qian 2, Shujuan Zhao 2, Xin Qi 3, Ludan Ye 2, M Monica Giusti 4, Xingya Wang 5

2015 Apr 1;