Gentiopicroside, a naturally occurring iridoid glycoside, inhibits P450 activity, with an IC₅₀ and a K_i of 61 µM and 22.8 µM for CYP2A6; Gentiopicroside has antianti-inflammatoryand antioxidative effects.

IC50: 61 µM (CYP2A6)^[1]
Ki: 22.8 µM (CYP2A6)^[1]

Gentiopicroside inhibits P450 activity, with an IC₅₀ and a K_i of 61 µM and 8.12 µM for CYP2A6, also slightly inhibits CYP2E1 activity with an IC₅₀ of 1.6 mM, but shows no inhibition on CYP1A2 and CYP3A4^[1]. Gentiopicroside (12.5, 25 and 50 μM) inhibits RANKL-induced osteoclast formation from mouse bone marrow macrophages (BMMs) in a dose-dependent manner, blocks the expression of osteoclast-related proteins, prevents receptor activator of nuclear factor-κB ligand (RANKL)-triggered JNK and NF-κB activation. Gentiopicroside (50 μM) also inhibits RANKL-induced bone resorption^[3].

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

Gentiopicroside (20, 40, and 80 mg/kg, p.o.) significantly reduces gastric ulcerindex in mice. Gentiopicroside (20, 40, and 80 mg/kg) also ovbiously decreases the levels of HSP-70, TNF-α, IL-6, MDA and increases ncreased GSH level and SOD activity. In addition, Gentiopicroside normalizes EGF and VEGF level in mice^[2].

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

356.32

C₁₆H₂₀O₉

20831-76-9

龙胆苦苷；龙胆苦甙

Room temperature in continental US; may vary elsewhere.

Powder	-20deg;C	3 years
	4deg;C	2 years
In solvent	-80deg;C	6 months
	-20deg;C	1 month

In Vitro:;

DMSO : ≥ 100 mg/mL (280.65 mM)

H₂O : 100 mg/mL (280.65 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。-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。

In Vivo:

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: ≥ 2.08 mg/mL (5.84 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (5.84 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 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: ≥ 2.08 mg/mL (5.84 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (5.84 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 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: ≥ 2.08 mg/mL (5.84 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (5.84 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 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

• [1]. Deng Y, et al. In vitro inhibition and induction of human liver cytochrome P450 enzymes by gentiopicroside: potent effect on CYP2A6. Drug Metab Pharmacokinet. 2013;28(4):339-44. Epub 2013 Feb 19.

  [2]. Yang Y, et al. Protective effect of gentiopicroside from Gentiana macrophylla Pall. in ethanol-induced gastric mucosal injury in mice. Phytother Res. 2018 Feb;32(2):259-266.

  [3]. Chen F, et al. Gentiopicroside inhibits RANKL-induced osteoclastogenesis by regulating NF-κB and JNK signaling pathways. Biomed Pharmacother. 2018 Apr;100:142-146.

Cell viability is evaluated using the CCK-8 assay. In brief, bone marrow macrophages (BMMs) (1 × 10⁴ cells/well) are placed in a 96-well plate and cultured with various concentrations of Gentiopicroside (12.5, 25 and 50  μM) for 48  h in the presence of M-CSF (30  ng/mL) and RANKL (100  ng/mL). Then, 10  μL of the CCK-8 solution is added to each well and the mixture is incubated for 4  h at 37 °C. The absorbance is evaluated at 450  nm using a microplate reader^[3].

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

Mice^[2]
Mice are ran-domLy divided into six groups with 10 animals each. Drug is given by intragastric administration once a day for three consecutive days. Mice in the normal control group and the ethanol control group (negative control) receive saline at a dose of 2.5 mL/kg; Mice in the cimetidine control group (positive control) receive cimetidine at a dose of 100 mg/kg; mice in three Gentiopicroside investigative groups receive different doses of Gentiopicroside (20, 40, and 80 mg/kg), respectively; On the third day, except that mice in the normal control group receive saline, mice in other groups receive 70% ethanol at a dose of 0.01 mL/g by oral1 hr after the last intragastric administration. One hour after the induction, animals are euthanized under anesthesia by cervical dislocation, removed and cut the stomach longitudinally. The stomach are opened along the greater curvature and rinsed slightly with ice-cold saline to remove the gastric contents, and then the severity of gastric mucosal injury is evaluated by gastric ulcer index. Subsequently, each animal’sstomach is cut into two moieties, with one moiety of stomach stored at −80°C for biochemical assessment and the other moiety immersed in 4% paraformaldehyde solution for histopathological examinations^[2].

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

• [1]. Deng Y, et al. In vitro inhibition and induction of human liver cytochrome P450 enzymes by gentiopicroside: potent effect on CYP2A6. Drug Metab Pharmacokinet. 2013;28(4):339-44. Epub 2013 Feb 19.

  [2]. Yang Y, et al. Protective effect of gentiopicroside from Gentiana macrophylla Pall. in ethanol-induced gastric mucosal injury in mice. Phytother Res. 2018 Feb;32(2):259-266.

  [3]. Chen F, et al. Gentiopicroside inhibits RANKL-induced osteoclastogenesis by regulating NF-κB and JNK signaling pathways. Biomed Pharmacother. 2018 Apr;100:142-146.