Piperine, a natural alkaloid isolated from Piper nigrum L, inhibits P-glycoprotein and CYP3A4 activities with an IC₅₀ value of 61.94±0.054 μg/mL in HeLa cell.

Piperine has shown to possess in vitro cytotoxic activity and in silico studies. The IC₅₀ value is found to be 61.94±0.054 μg/mL and in silico studies, it has more number of hydrogen bonds with minimum binding and docking energy and may be considered as inhibitor of EGFR tyrosine kinase^[1]. Piperine has been found to have immunomodulatory, anti-oxidant, anti-asthmatic, anti-carcinogenic, anti-inflammatory, anti-ulcer, and anti-amoebic properties^[2]. Piperine could enhance the bioavailabilities of other drugs including rosuvastatin, peurarin and docetaxel (DOX) via inhibition of CYP3A and P-glycoprotein activity^[3].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

At the dose of 3.5 mg/kg, the bioavailability of piperine is calculated to be 25.36%. Its AUC_0→t is unproportionally increased with doses, indicating a potential non-linear pharmacokinetics profile of piperine. It is found that the AUC_0→t and C₀ of docetaxel and t1/2of piperine are significantly increased after their combination use, suggesting potential enhanced bioavailability of not only docetaxel but also piperine, which may lead to the overall enhanced pharmacological effects^[3]. The phosphorylation of I-κB, p65, p38, ERK, and JNK is inhibited by piperine in a dose-dependent manner, indicating that piperine may be a potential anti-inflammatory drug both in endometritis and in other S. aureus-induced diseases^[4].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

285.34

C₁₇H₁₉NO₃

94-62-2

胡椒碱；胡椒酰胺

Room temperature in continental US; may vary elsewhere.

DMSO : 50 mg/mL (175.23 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: ≥ 2.5 mg/mL (8.76 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (8.76 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 (8.76 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (8.76 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 (8.76 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (8.76 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]. Paarakh PM, et al. In vitro cytotoxic and in silico activity of piperine isolated from Piper nigrum fruits Linn. In Silico Pharmacol. 2015 Dec;3(1):9. Epub 2015 Oct 29.

  [2]. Meghwal M,et al. Piper nigrum and piperine: an update. Phytother Res. 2013 Aug;27(8):1121-30.

  [3]. Li C, et al. Non-linear pharmacokinetics of piperine and its herb-drug interactions with docetaxel in Sprague-Dawley rats. J Pharm Biomed Anal. 2016 Sep 5;128:286-93.

  [4]. Zhai WJ, et al. Piperine Plays an Anti-Inflammatory Role in Staphylococcus aureus Endometritis by Inhibiting Activation of NF-κB and MAPK Pathways in Mice. Evid Based Complement Alternat Med. 2016;2016:8597208.

Standard solution is prepared by dissolving 10 mg of piperine in 100 mL of methanol. The MTT assay is carried out to measure cell viability. Ten thousand cells in 100 μL of DMEM media are seeded in the wells of a 96-well plate. After 24 h, existing media is removed and 100 μL of various concentrations of piperine (20–100 μg/mL) are added and incubated for 48 h at 37 °C in a CO₂ incubator. Control cells are supplemented with 0.05 % DMSO vehicle. At the 48th hour of incubation, MTT (10 μL of 5 mg/mL) is added to the plate. The contents of the plate are pipetted out carefully, the formazan crystals formed are dissolved in 100 μL of DMSO, and the absorbance is measured at 550 nm in a microplate reader^[1].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

Rats: The stock solutions of piperine (PIP) and docetaxel (DOX)are prepared by dissolving appropriate amount of each authentic compound in DMSO separately at 1 mg/mL. The standard solutions containing both PIP and DOX are prepared by serial dilution of the stock solutions with 0.2% formic acid and acetonitrile (50:50, v/v) to yield concentrations of 25, 50, 100, 200, 400, 800, 1600, 3200, 6400, 12800 ng/mL. 25 Sprague-Dawley rats are divided into five groups receiving DOX(Group DOX 7 iv, 7 mg/kg, i.v.), PIP (Group PIP 35 po, 35 mg/kg,p.o.) and their combined administration (Group DOX+PIP) as well as PIP (Group PIP 3.5 po, 3.5 mg/kg, p.o.) and PIP (Group PIP 3.5 iv, 3.5 mg/kg, i.v.)^[3].

Mice: Piperine is dissolved in 5 mL of tris buffered saline (TBS) at concentrations corresponding to 25, 50, and 100 mg/kg, based on the weight of the mice. After 24 h of S. aureus infection in the uterus, the piperine solution is injected intraperitoneally three times every 6 h. A total of 60 female BALB/c mice are used in this study. All mice are maintained on a 12 h light/dark cycle and cafeteria feeding^[4].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

• [1]. Paarakh PM, et al. In vitro cytotoxic and in silico activity of piperine isolated from Piper nigrum fruits Linn. In Silico Pharmacol. 2015 Dec;3(1):9. Epub 2015 Oct 29.

  [2]. Meghwal M,et al. Piper nigrum and piperine: an update. Phytother Res. 2013 Aug;27(8):1121-30.

  [3]. Li C, et al. Non-linear pharmacokinetics of piperine and its herb-drug interactions with docetaxel in Sprague-Dawley rats. J Pharm Biomed Anal. 2016 Sep 5;128:286-93.

  [4]. Zhai WJ, et al. Piperine Plays an Anti-Inflammatory Role in Staphylococcus aureus Endometritis by Inhibiting Activation of NF-κB and MAPK Pathways in Mice. Evid Based Complement Alternat Med. 2016;2016:8597208.