2. Metabolic Enzyme/Protease Membrane Transporter/Ion Channel MAPK/ERK Pathway Stem Cell/Wnt
  3. PAI-1 Potassium Channel ERK JNK
  4. Loureirin B

Loureirin B  (Synonyms: 龙血素 B)

目录号: HY-N1504 纯度: 99.16%
COA 产品使用指南

摩尔计算器

Loureirin B 是从剑叶龙血树中分离到的黄酮类化合物，为 PAI-1 的抑制剂，IC50 值为 26.10 μM；Loureirin B 同时可以抑制 KATP，以及 ERK、JNK 的磷酸化，具有抗糖尿病的功效。

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Loureirin B Chemical Structure

Loureirin B Chemical Structure

CAS No. : 119425-90-0

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规格 价格 是否有货 数量
10 mM * 1 mL in DMSO ￥1650
In-stock
1 mg ￥600
In-stock
5 mg ￥1500
In-stock
10 mg ￥2200
In-stock
50 mg   询价  
100 mg   询价  

* Please select Quantity before adding items.

Customer Review

Other Forms of Loureirin B:

Loureirin B 相关抗体

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  • 生物活性

  • 实验参考方法

  • 纯度 & 产品资料

  • 参考文献

生物活性

Loureirin B, a flavonoid extracted from Dracaena cochinchinensis, is an inhibitor of plasminogen activator inhibitor-1 (PAI-1), with an IC50 of 26.10 μM; Loureirin B also inhibits KATP, the phosphorylation of ERK and JNK, and has anti-diabetic activity.

IC50 & Target[1][2][4]

PAI-1

26.1 μM (IC50)

KATP

 

ERK

 

JNK

 

体外研究
(In Vitro)

Loureirin B enhances the relative mRNA level of Pdx-1 and MafA. Loureirin B (1, 0.1, and 0.01 µM) increases insulin secretion in Ins-1 cells. Loureirin B (0.01 µM) almost causes no toxicity on cells. Loureirin B improves the level of expressions of MafA and Pdx-1 and ATP level. Loureirin B inhibits the KATP current but increases the [Ca2+]i level in Ins-1 cells[1]. Loureirin B inhibits the expression of Col1 and FN, as well as the TGF-β1-mediated up regulation of p-JNK. Loureirin B also inhibits the up regulation of p-ERK that is induced by TGF-β1. Moreover, Loureirin B inhibits the contraction of TGF-β1-stimulated fibroblasts through the down regulation of p-ERK and p-JNK. However, Loureirin B does not suppress the up regulation of p-p38 that is induced by TGF-β1[2]. Loureirin B downregulates both mRNA and protein levels of type I collagen, type III collagen and α-smooth muscle actin in a dose dependent manner in HS fibroblasts. Loureirin B also suppresses fibroblast proliferative activity and redistributes cell cycle, but does not affect cell apoptosis[3].

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

Loureirin B 相关抗体:
体内研究
(In Vivo)

Loureirin B significantly improves the arrangement and deposition of collagen fibres, decreases protein levels of ColI, ColIII and α-SMA and suppresses myofibroblast differentiation and scar proliferative activity, in a rabbit ear scar model. Loureirin B effectively inhibits TGF-β1-induced upregulation of ColI, ColIII and α-SMA levels, myofibroblast differentiation and the activation of Smad2 and Smad3, in NS fibroblasts[3].

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

316.35

Formula

C18H20O5
CAS 号
性状

固体

颜色

White to off-white

中文名称

龙血素 B
结构分类
初始来源
运输条件

Room temperature in continental US; may vary elsewhere.
储存方式
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
溶解性数据
细胞实验： 

DMSO 中的溶解度 : ≥ 150 mg/mL (474.16 mM; 吸湿的 DMSO 对产品的溶解度有显著影响，请使用新开封的 DMSO)

* "≥" means soluble, but saturation unknown.

配制储备液
浓度 溶剂体积 质量 1 mg 5 mg 10 mg
1 mM 3.1611 mL 15.8053 mL 31.6106 mL
5 mM 0.6322 mL 3.1611 mL 6.3221 mL
查看完整储备液配制表

* 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, 2 years; -20°C, 1 year。-80°C储存时，请在2年内使用， -20°C储存时，请在1年内使用。

  • 摩尔计算器

  • 稀释计算器

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

质量
=
浓度
×
体积
×
分子量 *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

浓度 (start)

C1

×
体积 (start)

V1

=
浓度 (final)

C2

×
体积 (final)

V2

动物实验：

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

  • 方案 一

    请依序添加每种溶剂： 10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.5 mg/mL (7.90 mM); 澄清溶液

    此方案可获得 ≥ 2.5 mg/mL（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；再向上述体系中加入 50 μL Tween-80，混合均匀；然后再继续加入 450 μL 生理盐水 定容至 1 mL。

    生理盐水的配制：将 0.9 g 氯化钠，溶解于 ddH₂O 并定容至 100 mL，可以得到澄清透明的生理盐水溶液。
  • 方案 二

    请依序添加每种溶剂： 10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: ≥ 2.5 mg/mL (7.90 mM); 澄清溶液

    此方案可获得 ≥ 2.5 mg/mL（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。

    20% SBE-β-CD in Saline 的配制（4°C，储存一周）：2 g SBE-β-CD（磺丁基醚 β-环糊精）粉末定容于 10 mL 的生理盐水中，完全溶解至澄清透明。
动物溶解方案计算器
请输入动物实验的基本信息：

给药剂量

mg/kg

动物的平均体重

g

每只动物的给药体积

μL

动物数量

只
由于实验过程有损耗，建议您多配一只动物的量
请输入您的动物体内配方组成：
%
DMSO +
% 
+
%
Tween-80 +
%
Saline
如果您的动物是免疫缺陷鼠或者体弱鼠，建议 DMSO 中的在最后工作液体系中的占比尽量不超过 2%。
方案所需 助溶剂 包括：DMSO， ，均可在 MCE 网站选购。 ，Tween 80，均可在 MCE 网站选购。
计算结果
工作液所需浓度 : mg/mL
储备液配制方法 : mg 药物溶于 μL  DMSO（母液浓度为 mg/mL）。
您所需的储备液浓度超过该产品的实测溶解度，以下方案仅供参考，如有需要，请与 MCE 中国技术支持联系。
动物实验体内工作液的配制方法 : 取 μL DMSO 储备液，加入 μL 。 μL ，混合均匀至澄清，再加 μL Tween 80，混合均匀至澄清，再加 μL 生理盐水。
连续给药周期超过半月以上，请谨慎选择该方案。
请确保第一步储备液溶解至澄清状态，从左到右依次添加助溶剂。您可采用超声加热 （超声清洗仪，建议频次 20-40 kHz），涡旋吹打等方式辅助溶解。
纯度 & 产品资料

纯度: 99.16%

COA (283 KB) LCMS (266 KB)

产品使用指南 (1538 KB)
参考文献
Cell Assay
[1]

Ins-1 cells are seeded onto 96-well plates and cultured for 48 h to approximately 80-90% confluence. Then, the cells are starved in a 2% FBS/DMEM for 12 h. Control group is cultured in medium without loureirin B, while the positive control group is received fresh medium with glimepiride. After the treatment of loureirin B and glimepiride for 4 and 8 h, the cell viability is measured by Cell Counting Kit-8 (CCK-8).

MCE has not independently confirmed the accuracy of these methods. They are for reference only.
Animal Administration
[3]

For short, 10 adult New Zealand white male rabbits (2.0-2.5 kg b.w./each) are acclimated and housed under the standard 12-h light: 12-h dark cycle with free access of water and SPF basal diet. Rabbit is first anaesthetized with 1% pentobarbital (1.5 mg/kg b.w.), and then, a dermal punch biopsy (10×4 mm) is created down to bare cartilage on the ventral surface of each ear to outline a full-thickness wound. Four punch wounds are made on each ear of the eight rabbits. A dissecting microscope is used to ensure the complete removal of epidermis, dermis and perichondrium in each wound. Forty-eight hours after surgery, wounded rabbits are randomLy divided into two groups with each being subcutaneously injected with DMSO solution (0.125% in PBS, 0.25 mL/kg b.w.) on the left ear or loureirin B solution (25 μg/mL in PBS, 0.25 mL/kg b.w.) on the right ear once every other day for total six times. Two rabbits are used for pilot experiment, four rabbits are sacrificed 14 days after injury (n = 4), and the rest four are sacrificed 28 days after injury (n=4). Two of the four scar tissues on the same ear are processed for Western blot, and the other two are used for Masson staining.

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

Loureirin B 相关分类

完整储备液配制表

* 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, 2 years; -20°C, 1 year。-80°C储存时，请在2年内使用， -20°C储存时，请在1年内使用。

可选溶剂 浓度 溶剂体积 质量 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 3.1611 mL 15.8053 mL 31.6106 mL 79.0264 mL
5 mM 0.6322 mL 3.1611 mL 6.3221 mL 15.8053 mL
10 mM 0.3161 mL 1.5805 mL 3.1611 mL 7.9026 mL
15 mM 0.2107 mL 1.0537 mL 2.1074 mL 5.2684 mL
20 mM 0.1581 mL 0.7903 mL 1.5805 mL 3.9513 mL
25 mM 0.1264 mL 0.6322 mL 1.2644 mL 3.1611 mL
30 mM 0.1054 mL 0.5268 mL 1.0537 mL 2.6342 mL
40 mM 0.0790 mL 0.3951 mL 0.7903 mL 1.9757 mL
50 mM 0.0632 mL 0.3161 mL 0.6322 mL 1.5805 mL
60 mM 0.0527 mL 0.2634 mL 0.5268 mL 1.3171 mL
80 mM 0.0395 mL 0.1976 mL 0.3951 mL 0.9878 mL
100 mM 0.0316 mL 0.1581 mL 0.3161 mL 0.7903 mL
Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Loureirin B119425-90-0龙血素 BPAI-1Potassium ChannelERKJNKPlasminogen activator inhibitor-1KcsAExtracellular signal regulated kinasesc-Jun N-terminal kinaseInhibitorinhibitorinhibit

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