Myricetin is a common plant-derived flavonoid with a wide range of activities including strong anti-oxidant, anticancer, antidiabetic and anti-inflammatory activities.

Myricetin exhibits the scavenging activity towards a number of radicals and ions. It displays poor activity (IC₅₀ value=1.4 mg/mL) in a superoxide dismutase (SOD)-like activity assay^[1]. It prevents cancer cell death via apoptosis via regulation of PI3K/Akt and MAPK signalling pathways^[2]. Myricetin exhibits antiphotoaging effects by quenching causative free radicals in the skin. Myricetin is able to suppress UVB-induced COX-2 expression in mouse skin epidermal JB6 P+ cells. It inhibits UVB-induced initiation of activator protein-1 and NF-κβ, as well as Fyn kinase activity^[1]. Myricetin inhibits viability of SKOV3 ovarian cancer cells in a dose-dependent manner. It induces DNA DSBs and ER stress, which leads to apoptosis in SKOV3 cells^[3]. Myricetin inhibits human Hsp70 by more than 80% with IC₅₀ values of 83, 11 and 12 μM, respectively^[4].

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

Treatment of orthotopic pancreatic tumors with myricetin results in tumor regression and decreases metastatic spread^[2]. Exposure to 150 μM myricetin causes 14%, 26%, 5% and 49% inhibition of rabbit platelet aggregation, induced by ADP, arachidonic acid, collagen and PAF, respectively^[5].

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

318.24

C₁₅H₁₀O₈

529-44-2

杨梅素；杨梅酮

Room temperature in continental US; may vary elsewhere.

DMSO : ≥ 31 mg/mL (97.41 mM)

Ethanol : 28.57 mg/mL (89.78 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。

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 (6.54 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (6.54 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 (6.54 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (6.54 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

• [1]. Semwal DK, et al. Myricetin: A Dietary Molecule with Diverse Biological Activities. Nutrients. 2016 Feb 16;8(2):90.

  [2]. Phillips PA, et al. Myricetin induces pancreatic cancer cell death via the induction of apoptosis and inhibition of thephosphatidylinositol 3-kinase (PI3K) signaling pathway. Cancer Lett. 2011 Sep 28;308(2):181-8.

  [3]. Xu Y, et al. Myricetin induces apoptosis via endoplasmic reticulum stress and DNA double-strand breaks in human ovarian cancer cells. Mol Med Rep. 2016 Mar;13(3):2094-100.

  [4]. Jinwal UK, et al. Chemical Manipulation of Hsp70 ATPase Activity Regulates Tau Stability. J Neurosci. 2009 Sep 30;29(39):12079-88.

  [5]. Tzeng SH, et al. Inhibition of platelet aggregation by some flavonoids. Thromb Res. 1991 Oct 1;64(1):91-100.

Pancreatic cancer cells (MIA PaCa-2, Panc-1 or S2-013) or normal pancreatic ductal cells (PDCs) are treated with myricetin (12.5–200 μM). Cell viability is determined using the Dojindo Cell Counting Kit-8. Cells are seeded onto a 96-well plate at 1×10⁴ cells per well and allowed to adhere overnight. After treatment with myricetin at various concentrations for 24 hours, 10 μL of the tetrazolium substrate is added to each well of the plate. Plates are incubated at 37°C for 1 hour, after which the absorbance at 450 nm is measured^[2].

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

Mice: Mice are given daily intraperitoneal injections of myricetin (30mg/kg in the MIA PaCa-2 model and 50mg/kg in the S2-013 model) or vehicle (DMSO) for 35 days (MIA PaCa-2 model) or 18 days (S2-013 model). Ultrasound measurements are performed at regular intervals to monitor tumor growth. At the end of the in vivo experiment, tumor size is measured using calipers and tumor volume is calculated^[2].

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

• [1]. Semwal DK, et al. Myricetin: A Dietary Molecule with Diverse Biological Activities. Nutrients. 2016 Feb 16;8(2):90.

  [2]. Phillips PA, et al. Myricetin induces pancreatic cancer cell death via the induction of apoptosis and inhibition of thephosphatidylinositol 3-kinase (PI3K) signaling pathway. Cancer Lett. 2011 Sep 28;308(2):181-8.

  [3]. Xu Y, et al. Myricetin induces apoptosis via endoplasmic reticulum stress and DNA double-strand breaks in human ovarian cancer cells. Mol Med Rep. 2016 Mar;13(3):2094-100.

  [4]. Jinwal UK, et al. Chemical Manipulation of Hsp70 ATPase Activity Regulates Tau Stability. J Neurosci. 2009 Sep 30;29(39):12079-88.

  [5]. Tzeng SH, et al. Inhibition of platelet aggregation by some flavonoids. Thromb Res. 1991 Oct 1;64(1):91-100.