18β-Glycyrrhetinic acid is the major bioactive component of Glycyrrhizae Radix and possesses anti-ulcerative, anti-inflammatory and antiproliferative properties.

18β-Glycyrrhetinic acid is the major bioactive component of Glycyrrhizae Radix and possesses anti-ulcerative, anti-inflammatory and antiproliferative properties. MTS assay demonstrates that 24 h treatment of 18β-Glycyrrhetinic acid suppresses cell proliferation in both cell lines in a dose-dependent manner. 18β-Glycyrrhetinic acid at 160 μM significantly decreases the percentage of viable cells to around 40.5±10.5% in A549 and 38.3±4.6% in NCI-H460 (p<0.01 respectively). When the cells are treated with 320 μM 18β-Glycyrrhetinic acid, a greater inhibitory effects on cell proliferation is shown, as the percentage of viable cells is below 30% compare with untreated controls (p<0.001). Treatment with 18β-Glycyrrhetinic acid at 160 μM and 320 μM decreases the levels of full-length PARP and increases the levels of cleaved-PARP^[1].

Shanghai Jinpan Biotech Co Ltd has not independently confirmed the accuracy of these methods. They are for reference only.

Rats in 18β-Glycyrrhetinic acid+Triptolide (TP) group which receive low-dose 18β-Glycyrrhetinic acid (50 mg/kg) have significant reductions in the three serum parameters when compare with TP rats. Rats in 18β-Glycyrrhetinic acid+TP group which receive the high-dose 18β-Glycyrrhetinic acid (100 mg/kg) have slightly lowered the levels of three liver enzymes, the reductions do not reach statistical significance compare with TP group. Contrastingly, preadministration of low-dose 18β-Glycyrrhetinic acid protects animals from TP-induced hepatic lesions. On the contrary, low-dose 18β-Glycyrrhetinic acid (50 mg/kg) markedly suppresses the release of the four cytokines above^[3].

Shanghai Jinpan Biotech Co Ltd has not independently confirmed the accuracy of these methods. They are for reference only.

470.68

C₃₀H₄₆O₄

471-53-4

18β-甘草次酸

Room temperature in continental US; may vary elsewhere.

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

In Vitro: 

DMSO : ≥ 250 mg/mL (531.15 mM)

* “≥” 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: ≥ 2.17 mg/mL (4.61 mM); Clear solution

  此方案可获得 ≥ 2.17 mg/mL (4.61 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 21.7 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% corn oil

  Solubility: ≥ 2.17 mg/mL (4.61 mM); Clear solution

  此方案可获得 ≥ 2.17 mg/mL (4.61 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 21.7 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

• [1]. Huang RY, et al. 18β-Glycyrrhetinic acid suppresses cell proliferation through inhibiting thromboxane synthase in non-small cell lung cancer. PLoS One. 2014 Apr 2;9(4):e93690.

  [2]. Zhou J, et al. 18β-glycyrrhetinic acid suppresses experimental autoimmune encephalomyelitis through inhibition of microglia activation and promotion of remyelination. Sci Rep. 2015 Sep 2;5:13713.

  [3]. Yang G, et al. Protective Effect of 18β-Glycyrrhetinic Acid against Triptolide-Induced Hepatotoxicity in Rats. Evid Based Complement Alternat Med. 2017;2017:3470320.

Primary microglia cultures are used in this study. For treatment assay, microglia are incubated with complete DMEM and stimulated with or without 100 ng/mL IFN-γ in the presence or absence of 18β-Glycyrrhetinic acid (25 μM and 50 μM) at 37°C in a humidified incubator with 5% CO₂. For cell migration assay, the isolated primary microglia that seeded in complete DMEM medium are stimulated with or without IFN-γ (100 ng/mL), and treated with different doses of 18β-Glycyrrhetinic acid, 24 h later, the microglia culture supernatants are collected and added to the lower chambers of Transwell inserts^[2].

Shanghai Jinpan Biotech Co Ltd has not independently confirmed the accuracy of these methods. They are for reference only.

Healthy Wistar rats (male, 200±20 g) are used and divided into five groups with 10 individuals for each group randomly. Animals in normal control (NC) group receive distilled water for 6 days and 0.5% CMC-Na for the last 3 days. Rats in Triptolide model group (TP), 18β-Glycyrrhetinic acid low-dose group (GAL+TP), and 18β-Glycyrrhetinic acid high-dose group (GAH+TP) receive distilled water, 18β-Glycyrrhetinic acid (50 mg/kg, p.o., dissolved in distilled water), or 18β-Glycyrrhetinic acid (100 mg/kg, p.o., dissolved in distilled water) for consecutive 6 days, respectively, and liver injury is induced by TP (2.4 mg/kg, p.o., suspended in 0.5% CMC-Na) for the last 3 days. Animals in the above three groups receive TP 6 hours after distilled water or 18β-Glycyrrhetinic acid treatment on the last 3 days^[3].

Shanghai Jinpan Biotech Co Ltd has not independently confirmed the accuracy of these methods. They are for reference only.

• [1]. Huang RY, et al. 18β-Glycyrrhetinic acid suppresses cell proliferation through inhibiting thromboxane synthase in non-small cell lung cancer. PLoS One. 2014 Apr 2;9(4):e93690.

  [2]. Zhou J, et al. 18β-glycyrrhetinic acid suppresses experimental autoimmune encephalomyelitis through inhibition of microglia activation and promotion of remyelination. Sci Rep. 2015 Sep 2;5:13713.

  [3]. Yang G, et al. Protective Effect of 18β-Glycyrrhetinic Acid against Triptolide-Induced Hepatotoxicity in Rats. Evid Based Complement Alternat Med. 2017;2017:3470320.