Gypenoside XVII, a novel phytoestrogen belonging to the gypenosides, can activate estrogen receptors.

The ability of Gypenoside XVII (GP-17) to prevent Ox-LDL-induced cytotoxicity is detected by cell viability assays. Gypenoside XVII does not demonstrate any cytotoxicity in HUVECs. Gypenoside XVII can protect HUVECs against Ox-LDL-induced apoptosis. Gypenoside XVII dose-dependently mitigates the toxic effect of Ox-LDL on HUVEC viability. The viability of HUVECs is significantly higher than that of other groups at 50 μg/mL Gypenoside XVII ^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Body weights are measured as physical measures of hormone bioactivity. Mean body weights are significantly higher in every group compared to that of the control, but there is no significant difference in body weight between the different treatments during the 10-week feeding. The mouse plasma lipid levels are also measured at the end of 10 weeks of a high-fat diet. Circulating levels of total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C) are significantly increased in the treated groups of ApoE^-/- mice compared with those of the C57BL/6J control group; Gypenoside XVII (GP-17) and Probucol treatment substantially decreases both of these parameters relative to those of the ApoE^-/- model group^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

947.15

C₄₈H₈₂O₁₈

80321-69-3

七叶胆苷 XVII；绞股蓝皂苷 XVII

Room temperature in continental US; may vary elsewhere.

4deg;C, protect from light

*In solvent : -80deg;C, 6 months; -20deg;C, 1 month (protect from light)

DMSO : ≥ 100 mg/mL (105.58 mM)

H₂O : 41.67 mg/mL (44.00 mM; Need ultrasonic)

* “≥” means soluble, but saturation unknown.

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80°C, 6 months; -20°C, 1 month (protect from light)。-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液，再依次添加助溶剂：

——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用； 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

• 1.

  请依序添加每种溶剂：;10% DMSO ;; 40% PEG300 ;; 5% Tween-80 ;; 45% saline

  Solubility: ≥ 2.5 mg/mL (2.64 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (2.64 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；向上述体系中加入50 μL Tween-80，混合均匀；然后继续加入 450 μL生理盐水定容至 1 mL。

  将 0.9 g 氯化钠，完全溶解于 100 mL ddH₂O 中，得到澄清透明的生理盐水溶液

• 2.

  请依序添加每种溶剂：;10% DMSO ;; 90% (20% SBE-β-CD in saline)

  Solubility: ≥ 2.5 mg/mL (2.64 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (2.64 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液中，混合均匀。

  将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明
• 3.

  请依序添加每种溶剂：;10% DMSO ;; 90% corn oil

  Solubility: ≥ 2.5 mg/mL (2.64 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (2.64 mM，饱和度未知) 的澄清溶液，此方案不适用于实验周期在半个月以上的实验。

  以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

• [1]. Yang K, et al. Gypenoside XVII Prevents Atherosclerosis by Attenuating Endothelial Apoptosis and Oxidative Stress: Insight into the ERα-Mediated PI3K/Akt Pathway. Int J Mol Sci. 2017 Feb 9;18(2). pii: E77.

For the establishment of an Ox-LDL-induced apoptosis model and measurement of Gypenoside XVII’s protective effect, the HUVECs are seeded in 96-well plates at a density of 10⁵ cells per mL and grown for 24 h. Then, the HUVECs are pretreated with Gypenoside XVII (6.25, 12, 25, 50, 100 μg/mL) for 12 h in serum-free endothelial cell basal medium, followed by incubation with Ox-LDL (100 μg/mL, 24 h) which does not have Gypenoside XVII. After 24 h, the treated HUVECs are incubated with 5 mg/mL MTT in fresh medium for an additional 4 h. Absorbance is measured at 570 nm using a plate reader^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Mice^[1]
A total of 42 ApoE^-/- mice and 12 male C57BL/6J mice with the same age and body weight (approximately 20 g in body weight and 6 weeks old) are randomly divided into 4 groups (12 mice for each group) and orally administered the following once a: C57 control group (vehicle; 0.5% sodium carboxymethylcellulose, CMC-Na); ApoE^-/- model group (vehicle; 0.5% CMC-Na); ApoE^-/-+Gypenoside XVII group (Gypenoside XVII, 50 mg/kg via i.g. ); ApoE^-/-+probucol group (Probucol, 2 mg/kg via i.g.). Probucol is an antioxidant drug used as a positive control. After two weeks of acclimatization, all the mice are fed a high-fat diet including 0.3% cholesterol and 20% pork fat for 10 weeks. They are maintained in pathogen-free conditions at approximately 22±1°C on a 12 h light-dark cycle with free access to food and water. The body weights are determined every two weeks. After 10 weeks of the treatments, all animals are anesthetized with pentobarbital sodium and killed after being deprived of food overnight. Serum is immediately separated from blood samples by centrifugation at 3600 rpm for 15 min, and the tissue samples (heart and aorta) are rapidly removed and frozen in -8°C.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

• [1]. Yang K, et al. Gypenoside XVII Prevents Atherosclerosis by Attenuating Endothelial Apoptosis and Oxidative Stress: Insight into the ERα-Mediated PI3K/Akt Pathway. Int J Mol Sci. 2017 Feb 9;18(2). pii: E77.