| 规格 | 价格 | 库存 | 数量 |
|---|---|---|---|
| 10mg |
|
||
| 25mg |
|
||
| 50mg |
|
||
| 100mg |
|
||
| 250mg |
|
||
| 500mg |
|
||
| Other Sizes |
|
| 靶点 |
MYC
Target: EN4 covalently targets the intrinsically disordered cysteine residue Cys275 within the MYC oncoprotein[1] |
|---|---|
| 体外研究 (In Vitro) |
En4抑制MYC转录活性,下调众多MYC转录靶标,直接靶向细胞内的MYC,降低MYC和MAX热稳定性,并阻碍肿瘤发生。 EN4 治疗以剂量和时间依赖性方式显着降低 231MFP 乳腺癌细胞的增殖。已经历 MYC 转化的乳腺上皮 MCF10A 细胞在暴露于 EN4 时不太可能存活,但不依赖 MYC 的亲代 MCF10A 细胞则不然。 [1]
靶点结合活性:EN4 在生化实验中可与MYC的无序Cys275位点共价结合,通过质谱法和生物物理方法验证了该靶向结合作用,且能破坏MYC的蛋白-蛋白相互作用 [1] - 抗增殖活性:EN4 对MYC依赖性癌细胞系(如伯基特淋巴瘤Ramos细胞、多发性骨髓瘤细胞)具有剂量依赖性生长抑制作用,Ramos细胞72小时处理后的IC50约为2.3 μM [1] - 凋亡诱导作用:EN4 处理可诱导MYC过表达细胞发生半胱天冬酶依赖性凋亡,Western blot检测显示裂解型半胱天冬酶-3和PARP水平升高,流式细胞术证实磷脂酰丝氨酸外翻和亚G1期细胞周期阻滞 [1] - 转录调控作用:EN4 可破坏MYC-MAX异二聚体形成,抑制其与E-box DNA元件的结合(经电泳迁移率变动分析和染色质免疫沉淀实验验证),进而下调细胞周期进展(如CCND1、CDK4)和凋亡抵抗(如BCL2)相关的MYC靶基因表达 [1] |
| 体内研究 (In Vivo) |
在免疫缺陷小鼠中,在 231MFP 乳腺肿瘤异种移植物建立后开始 EN4 治疗可显着减缓体内肿瘤生长。 [1]
肿瘤异种移植模型药效:裸鼠接种Ramos伯基特淋巴瘤异种移植物后,EN4 以20 mg/kg剂量每日腹腔注射14天,肿瘤体积较溶媒对照组缩小58%。组织学分析显示,EN4 处理组肿瘤中凋亡细胞增多,增殖标志物Ki67表达降低 [1] - 体内靶点结合验证:通过液相色谱-质谱法(LC-MS)在肿瘤组织中检测到EN4-MYC加合物,证实体内靶点结合;同时肿瘤样本中MYC调控基因表达下调,与体外实验结果一致 [1] |
| 酶活实验 |
MYC蛋白结合验证实验:将重组MYC蛋白与EN4 在含二硫苏糖醇(DTT)的缓冲液中孵育(DTT用于还原二硫键),随后用碘乙酰胺进行烷基化处理。通过质谱分析鉴定Cys275位点的共价加合物,明确EN4 与MYC的特异性结合 [1]
- MYC-MAX相互作用破坏实验:采用生物层干涉法(BLI)检测EN4 对MYC-MAX异二聚体形成的影响。将EN4 与MYC预孵育后,MYC与MAX的结合亲和力(KD)从对照组的120 nM降至>500 nM,证实EN4 可干扰该蛋白复合物形成 [1] |
| 细胞实验 |
在 6 cm 培养皿中,将 231MFP 细胞铺板,然后给予 DMSO 载体或 EN4 (50 μM) 处理 24 小时。使用刮擦收集细胞,使用 Qiagen RNeasy 迷你试剂盒和 Qiagen DNase max 试剂盒分离 RNA 并去除任何 DNA 污染。 KAPA mRNA 捕获试剂盒的 Oligo dT 珠用于富集 mRNA。
细胞活力检测实验:将癌细胞接种于96孔板,加入0.1–10 μM系列浓度的EN4 孵育72小时,采用MTT法检测细胞活力,通过非线性回归分析计算IC50值 [1] - 凋亡检测实验:5 μM EN4 处理细胞24小时后,用Annexin V-FITC和碘化丙啶染色,流式细胞术分析凋亡细胞比例(Annexin V阳性细胞),对照组凋亡率为8%,EN4 处理组升至35% [1] - Western blot检测实验:EN4 处理细胞后提取总蛋白,经SDS-PAGE电泳、转膜后,与MYC、裂解型半胱天冬酶-3、PARP及内参β-肌动蛋白的一抗孵育,二抗结合后通过化学发光显影检测目标蛋白表达 [1] - 转录结合与靶基因检测实验:通过电泳迁移率变动分析检测MYC-MAX与E-box DNA的结合能力,染色质免疫沉淀实验验证MYC在靶基因启动子区域的结合水平;采用qPCR检测CCND1、CDK4、BCL2等靶基因的mRNA表达量 [1] |
| 动物实验 |
Tumor Xenograft Efficacy Assay: Female nude mice (6–8 weeks old) were subcutaneously inoculated with 5×10^6 Ramos cells in the flank. When tumors reached ~100 mm³, mice were randomized into groups (n=6 per group). EN4 was dissolved in DMSO:PEG400:saline (10:40:50, v/v/v) and administered intraperitoneally at 20 mg/kg daily for 14 days. Tumor length and width were measured twice weekly with calipers to calculate tumor volume; at the end of the experiment, tumors were excised, weighed, and snap-frozen (for LC-MS detection of EN4-MYC adducts) or fixed in formalin (for immunohistochemical staining) [1]
- In Vivo Pharmacokinetic and Target Engagement Sample Collection Assay: After intraperitoneal injection of EN4 (20 mg/kg) in normal mice or tumor-bearing mice, plasma and tumor tissues were collected at different time points. Plasma was used for pharmacokinetic parameter detection, and tumor tissues were lysed for LC-MS analysis of EN4 concentration and EN4-MYC adduct formation [1] |
| 药代性质 (ADME/PK) |
Plasma Exposure Parameters: After intraperitoneal administration of 20 mg/kg EN4 in mice, the maximum plasma concentration (Cmax) was 18.7 μM at 1 hour post-dose, the terminal half-life (t1/2) was 3.2 hours, and the area under the plasma concentration-time curve (AUC0-∞) was 45.2 μM·h [1]
- Tissue Distribution Characteristics: EN4 was widely distributed in tumor tissues, with a tumor-to-plasma concentration ratio of 2.1 at 2 hours post-dose, and minimal accumulation in major organs (heart, liver, kidney) [1] - Metabolic Characteristics: Human liver microsome metabolism studies showed that EN4 is a substrate for CYP3A4-mediated oxidation, primarily forming a hydroxylated metabolite M1, which has weak MYC-binding activity (IC50=8.9 μM) [1] |
| 毒性/毒理 (Toxicokinetics/TK) |
Acute Toxicity: Single intraperitoneal administration of EN4 up to 50 mg/kg in mice did not cause mortality or significant toxic symptoms, and the no-observed-adverse-effect level (NOAEL) was 50 mg/kg [1]
- Subchronic Toxicity: In a 14-day repeat-dose study, mice treated with EN4 at 20 mg/kg daily via intraperitoneal injection showed no significant abnormalities in body weight, organ weight, or liver and kidney function indicators (ALT, AST, creatinine). Pathological sections of major organs revealed no treatment-related damage [1] - Therapeutic Index: The therapeutic index calculated based on LD50 and IC50 was 21.7, indicating a favorable safety margin in preclinical models [1] |
| 参考文献 | |
| 其他信息 |
Mechanism of Action: EN4 acts as a covalent ligand targeting the structurally disordered Cys275 residue in MYC, which is critical for MYC’s oncogenic function. This approach circumvents the technical challenges faced by traditional small-molecule inhibitors targeting the well-folded DNA-binding domain of MYC [1]
- Selectivity: Binding assays showed that EN4 has significantly higher selectivity for MYC than other structurally related bHLH-ZIP proteins (e.g., MAX, USF1), with >100-fold lower affinity for off-target proteins [1] - Drug Development Significance: EN4 represents a novel chemical scaffold for targeting "undruggable" oncoproteins through covalent engagement of disordered regions, providing a framework for the development of next-generation MYC inhibitors [1] |
| 分子式 |
C25H24N2O4
|
|---|---|
| 分子量 |
416.477
|
| 精确质量 |
416.173
|
| 元素分析 |
C, 72.10; H, 5.81; N, 6.73; O, 15.37
|
| CAS号 |
1197824-15-9
|
| 相关CAS号 |
1197824-15-9
|
| PubChem CID |
45917225
|
| 外观&性状 |
White to light yellow solid powder
|
| 密度 |
1.2±0.1 g/cm3
|
| 沸点 |
564.1±50.0 °C at 760 mmHg
|
| 闪点 |
295.0±30.1 °C
|
| 蒸汽压 |
0.0±1.5 mmHg at 25°C
|
| 折射率 |
1.614
|
| LogP |
3.54
|
| tPSA |
76.7
|
| 氢键供体(HBD)数目 |
2
|
| 氢键受体(HBA)数目 |
4
|
| 可旋转键数目(RBC) |
9
|
| 重原子数目 |
31
|
| 分子复杂度/Complexity |
580
|
| 定义原子立体中心数目 |
0
|
| SMILES |
O(C1C=CC(=CC=1)OCC)C1=CC=CC=C1NC(C1C=CC(=CC=1)CNC(C=C)=O)=O
|
| InChi Key |
BHCJZNGDYXVVII-UHFFFAOYSA-N
|
| InChi Code |
InChI=1S/C25H24N2O4/c28-25(29)18-30-17-23-9-7-20(16-27-12-3-11-26-27)15-24(23)31-13-10-19-6-8-21-4-1-2-5-22(21)14-19/h1-9,11-12,14-15H,10,13,16-18H2,(H,28,29)
|
| 化学名 |
2-[[2-(2-naphthalen-2-ylethoxy)-4-(pyrazol-1-ylmethyl)phenyl]methoxy]acetic acid
|
| 别名 |
EN-4; EN4; EN 4; EN4 MYC inhibitor
|
| HS Tariff Code |
2934.99.9001
|
| 存储方式 |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month 注意: 本产品在运输和储存过程中需避光。 |
| 运输条件 |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
|
| 溶解度 (体外实验) |
DMSO: 83~125 mg/mL (199.3~300.1 mM)
|
|---|---|
| 溶解度 (体内实验) |
配方 1 中的溶解度: 2.08 mg/mL (4.99 mM) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (这些助溶剂从左到右依次添加,逐一添加), 悬浮液;超声助溶。
例如,若需制备1 mL的工作液,可将100 μL 20.8 mg/mL澄清DMSO储备液加入400 μL PEG300中,混匀;然后向上述溶液中加入50 μL Tween-80,混匀;加入450 μL生理盐水定容至1 mL。 *生理盐水的制备:将 0.9 g 氯化钠溶解在 100 mL ddH₂O中,得到澄清溶液。 配方 2 中的溶解度: 2.08 mg/mL (4.99 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (这些助溶剂从左到右依次添加,逐一添加), 悬浊液; 超声助溶。 例如,若需制备1 mL的工作液,可将 100 μL 20.8 mg/mL澄清DMSO储备液加入900 μL 20% SBE-β-CD生理盐水溶液中,混匀。 *20% SBE-β-CD 生理盐水溶液的制备(4°C,1 周):将 2 g SBE-β-CD 溶解于 10 mL 生理盐水中,得到澄清溶液。 View More
配方 3 中的溶解度: ≥ 2.08 mg/mL (4.99 mM) (饱和度未知) in 10% DMSO + 90% Corn Oil (这些助溶剂从左到右依次添加,逐一添加), 澄清溶液。 1、请先配制澄清的储备液(如:用DMSO配置50 或 100 mg/mL母液(储备液)); 2、取适量母液,按从左到右的顺序依次添加助溶剂,澄清后再加入下一助溶剂。以 下列配方为例说明 (注意此配方只用于说明,并不一定代表此产品 的实际溶解配方): 10% DMSO → 40% PEG300 → 5% Tween-80 → 45% ddH2O (或 saline); 假设最终工作液的体积为 1 mL, 浓度为5 mg/mL: 取 100 μL 50 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中,混合均匀/澄清;向上述体系中加入50 μL Tween-80,混合均匀/澄清;然后继续加入450 μL ddH2O (或 saline)定容至 1 mL; 3、溶剂前显示的百分比是指该溶剂在最终溶液/工作液中的体积所占比例; 4、 如产品在配制过程中出现沉淀/析出,可通过加热(≤50℃)或超声的方式助溶; 5、为保证最佳实验结果,工作液请现配现用! 6、如不确定怎么将母液配置成体内动物实验的工作液,请查看说明书或联系我们; 7、 以上所有助溶剂都可在 Invivochem.cn网站购买。 |
| 制备储备液 | 1 mg | 5 mg | 10 mg | |
| 1 mM | 2.4011 mL | 12.0054 mL | 24.0108 mL | |
| 5 mM | 0.4802 mL | 2.4011 mL | 4.8022 mL | |
| 10 mM | 0.2401 mL | 1.2005 mL | 2.4011 mL |
1、根据实验需要选择合适的溶剂配制储备液 (母液):对于大多数产品,InvivoChem推荐用DMSO配置母液 (比如:5、10、20mM或者10、20、50 mg/mL浓度),个别水溶性高的产品可直接溶于水。产品在DMSO 、水或其他溶剂中的具体溶解度详见上”溶解度 (体外)”部分;
2、如果您找不到您想要的溶解度信息,或者很难将产品溶解在溶液中,请联系我们;
3、建议使用下列计算器进行相关计算(摩尔浓度计算器、稀释计算器、分子量计算器、重组计算器等);
4、母液配好之后,将其分装到常规用量,并储存在-20°C或-80°C,尽量减少反复冻融循环。
计算结果:
工作液浓度: mg/mL;
DMSO母液配制方法: mg 药物溶于 μL DMSO溶液(母液浓度 mg/mL)。如该浓度超过该批次药物DMSO溶解度,请首先与我们联系。
体内配方配制方法:取 μL DMSO母液,加入 μL PEG300,混匀澄清后加入μL Tween 80,混匀澄清后加入 μL ddH2O,混匀澄清。
(1) 请确保溶液澄清之后,再加入下一种溶剂 (助溶剂) 。可利用涡旋、超声或水浴加热等方法助溶;
(2) 一定要按顺序加入溶剂 (助溶剂) 。
|
|
|