Isovitexin is a flavonoid isolated from rice hulls of Oryza sativa, possesses anti-inflammatory and anti-oxidant activities; Isovitexin acts like a JNK1/2 inhibitor and inhibits the activation of NF-κB.

Isovitexin protects against LPS-induced oxidative damage by suppressing intracellular ROS generation, and also attenuates the effect of H₂O₂ on cell viability. Isovitexin (0-100 μg/mL) with LPS (2 μg/mL) is not cytotoxic to RAW 264.7 cells, but 200 μg/mL Isovitexin shows significant cytotoxicity. Isovitexin (25, 50 μg/mL) inhibits LPS-induced increases in TNF-α, IL-6, iNOS, and COX-2 levels. Isovitexin (25, 50 μg/mL) also suppresses the IκBα phosphorylation and degradation in RAW 264.7 cells, and such an effect is consistent with that of JNK1/2 inhibitor^[1].

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

Isovitexin (50 and 100 mg/kg, i.p.) causes less severe histopathological changes in the lung sections, and reduces inflammatory cell count in LPS-induced mice. Isovitexin (50 and 100 mg/kg, i.p.) protects against LPS-induced inflammation and oxidative stress in LPS-induced ALI mice by decreasing TNF-α and IL-6 production, ROS generation, and MPO and MDA content, increasing SOD and GSH levels and effectively inhibiting the protein expression of iNOS and COX-2^[1]. Isovitexin (25, 50, 100 mg/kg) dose-dependently reduces the survival rate of LPS/D-gal induced hepatic injury in mice. Isovitexin also inhibits NF-κB activation and up-regulates Nrf2 and HO-1 induced by LPS/D-gal in mice^[2].

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

432.38

C₂₁H₂₀O₁₀

38953-85-4

异牡荆黄素

Room temperature in continental US; may vary elsewhere.

DMSO : 25 mg/mL (57.82 mM; Need ultrasonic)

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。

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 (4.81 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (4.81 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 (4.81 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (4.81 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 (4.81 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (4.81 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]. Lv H, et al. Isovitexin Exerts Anti-Inflammatory and Anti-Oxidant Activities on Lipopolysaccharide-Induced Acute Lung Injury by Inhibiting MAPK and NF-κB and Activating HO-1/Nrf2 Pathways. Int J Biol Sci. 2016 Jan 1;12(1):72-86.

  [2]. Hu JJ, et al. Isovitexin alleviates liver injury induced by lipopolysaccharide/d-galactosamine by activating Nrf2 and inhibiting NF-κB activation. Microb Pathog. 2018 Mar 29;119:86-92.

Cell viability is determined by an MTT assay. RAW 264.7 cells are plated in 96-well plates (1 × 10⁴ cells/well) and incubated with various concentrations of Isovitexin (final concentration: 0-200 μg/mL) and LPS (2 μg/mL) for 24 h. In addition, the cells are pretreated with IV (25 or 50 μg/mL) for 1 h, followed by the addition of H₂O₂ (300 μM). After 24 h, MTT (5 mg/mL) is added to the cells, which are then incubated for another 4 h^[1].

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

Mice^[1]
To create an ALI model, mice are randomLy divided into six groups: control (saline), Isovitexin only (100 mg/kg, dissolved in 0.5% DMSO), LPS only (0.5 mg/kg, dissolved in saline), LPS (0.5 mg/kg) + Isovitexin (50 or 100 mg/kg), and LPS (0.5 mg/kg) + dexamethasone (Dex, 5 mg/kg dissolved in saline). Isovitexin or Dex (5 mg/kg) are administered Isovitexin. After exposure to Isovitexin or Dex for 1 h, the mice are anesthetized with diethyl ether, and LPS is administered intranasally (i.n.) to induce lung injury. After LPS administration for 12 h, the animals are euthanized. Accordingly, bronchoalveolar lavage fluid (BALF) and lung tissue samples are harvested to measure cytokine levels; ROS generation; SOD, GSH, MDA and MPO activity; and COX-2, iNOS, HO-1, and Nrf2 protein expression^[1].

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

• [1]. Lv H, et al. Isovitexin Exerts Anti-Inflammatory and Anti-Oxidant Activities on Lipopolysaccharide-Induced Acute Lung Injury by Inhibiting MAPK and NF-κB and Activating HO-1/Nrf2 Pathways. Int J Biol Sci. 2016 Jan 1;12(1):72-86.

  [2]. Hu JJ, et al. Isovitexin alleviates liver injury induced by lipopolysaccharide/d-galactosamine by activating Nrf2 and inhibiting NF-κB activation. Microb Pathog. 2018 Mar 29;119:86-92.