HLM006474
目录号 : GC36236
An E2F inhibitor
Cas No.:353519-63-8
Sample solution is provided at 25 µL, 10mM.
;)
,-1-7$$$37316672.jpg');)
;)
;)
$$$36806353.jpg');)
;33(7)%EF%BC%9A546-561$$$37156877.jpg');)
;)
;)
;)
%201124-1138.$$$35908550.jpg');)
%20766-780.$$$37100057.jpg');)
%20418-432.$$$36893736.jpg');)
%EF%BC%9A-240-255.$$$35108512.jpg');)
533-545$$$36543525.jpg');)
%201-13.$$$36600053.jpg');)
;)
Quality Control & SDS
- View current batch:
- Purity: >98.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Cell experiment: | The antiproliferative activity of compounds and their combinations is evaluated using a high-throughput CellTiter-Blue cell viability assay. For the assays, 1000 cells in 24 µL are plated in 384-well plates and incubated overnight at 37°C, 5% CO2. The next day, the drugs are diluted in media and 6 µL of these dilutions added to appropriate wells using an automated pipetting station. Four replicate wells are used for each drug concentration. The cells are incubated with the drug for 120 hours, at which time, 5 µL CellTiter-Blue reagent is added. Cell viability is assessed by the ability of the remaining treated cells to bioreduce resazurin to resorufin (579 nm Ex/584 nm Em). Fluorescence is read with a Synergy HT microplate reader. IC50s are determined using a sigmoidal equilibrium model regression using XLfit version 4.3.2 and is defined as the concentration of drug required for a 50% reduction in growth/viability. For 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) cell viability assays, CellTiter 96 AQueous One Solution is added according to vendor instructions to cells for 2 hours following treatment with drug at the noted dose for 72 hours. All experiments are performed in triplicate and repeated at least three times[2]. |
References: [1]. Ma Y, et al. A small-molecule E2F inhibitor blocks growth in a melanoma culture model. Cancer Res. 2008 Aug 1;68(15):6292-9. | |
HLM006474 is a non-selective inhibitor of the transcription factor E2F (IC50 = 29.8 ?M for E2F4).1 It inhibits DNA binding to E2F1, E2F2, and E2F4 in A375 melanoma cells when used at a concentration of 40 ?M. HLM006474 (40 ?M) decreases protein levels of E2F4 and cyclin D3 and induces apoptosis in A375 cells. It also induces apoptosis in MDA-MB-231, but not MCF-7, cells and inhibits the growth of cancer cells in a panel of 17 lung cancer cell lines (IC50s = 15.5-75.1 ?M).1,2 HLM006474 reduces tumor growth in retinoblastoma-prone Chx10Cre;Rbfl/fl;p107-/- mice and in an A375 mouse xenograft model when administered at a dose of 100 mg/kg and 2 mg per mouse, respectively.3,4
1.Ma, Y., Kurtyaka, C.A., Boyapalle, S., et al.A small-molecule E2F inhibitor blocks growth in a melanoma culture modelCancer Res.68(15)6292-6299(2008) 2.Kurtyaka, C.A., Chen, L., and Cress, W.D.E2F inhibition synergizes with paclitaxel in lung cancer cell linesPLoS One9(5)e96357(2014) 3.Sangwan, M., McCurdy, S.R., Livne-Bar, I., et al.Established and new mouse models reveal E2f1 and Cdk2 dependency of retinoblastoma, and expose effective strategies to block tumor initiationOncogene31(48)5019-5028(2012) 4.Rouaud, F., Hamouda-Tekaya, N., Cerezo, M., et al.E2F1 inhibition mediates cell death of metastatic melanomaCell Death Dis.9(5)527(2018)
| Cas No. | 353519-63-8 | SDF | |
| Canonical SMILES | OC(C1=NC(C)=CC=C1C=C2)=C2C(NC3=NC=CC=C3)C(C=C4C)=CC=C4OCC | ||
| 分子式 | C25H25N3O2 | 分子量 | 399.48 |
| 溶解度 | DMSO: 25 mg/mL (62.58 mM); Water: < 0.1 mg/mL (insoluble) | 储存条件 | Store at -20°C |
| General tips | 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 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。 为了提高溶解度，请将管子加热至37℃，然后在超声波浴中震荡一段时间。 |
||
| Shipping Condition | 评估样品解决方案：配备蓝冰进行发货。所有其他可用尺寸：配备RT，或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
 |
1 mg | 5 mg | 10 mg |
| 1 mM | 2.5033 mL | 12.5163 mL | 25.0325 mL |
| 5 mM | 0.5007 mL | 2.5033 mL | 5.0065 mL |
| 10 mM | 0.2503 mL | 1.2516 mL | 2.5033 mL |
| 第一步：请输入基本实验信息（考虑到实验过程中的损耗，建议多配一只动物的药量） | ||||||||||
| 给药剂量 | mg/kg |  |
动物平均体重 | g | |
每只动物给药体积 | ul | |
动物数量 | 只 |
| 第二步：请输入动物体内配方组成（配方适用于不溶于水的药物；不同批次药物配方比例不同，请联系GLPBIO为您提供正确的澄清溶液配方） | ||||||||||
| % DMSO % % Tween 80 % saline | ||||||||||
| 计算重置 | ||||||||||
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，
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 saline，混匀澄清。
1. 首先保证母液是澄清的；
2.
一定要按照顺序依次将溶剂加入，进行下一步操作之前必须保证上一步操作得到的是澄清的溶液，可采用涡旋、超声或水浴加热等物理方法助溶。
3. 以上所有助溶剂都可在 GlpBio 网站选购。
Improved synthesis, resolution, absolute configuration determination and biological evaluation of HLM006474 enantiomers
Bioorg Med Chem Lett 2019 Feb 1;29(3):380-382.PMID:30578036DOI:10.1016/j.bmcl.2018.12.037.
An improved green synthesis of the E2F inhibitor HLM0066474 is described, using solvent-free and microwave irradiation conditions. The two enantiomers are separated using semi-preparative separation on Chiralpak ID and their absolute configuration is determined by vibrational circular dichroism (VCD) analysis. Biological evaluation of both enantiomers on E2F1 transcriptional activity reveals that the (+)-R, but not the (-)-S enantiomer is biologically active in repressing E2F1 transcriptional activity.
E2F inhibition synergizes with paclitaxel in lung cancer cell lines
PLoS One 2014 May 15;9(5):e96357.PMID:24831239DOI:10.1371/journal.pone.0096357.
The CDK/Rb/E2F pathway is commonly disrupted in lung cancer, and thus, it is predicted that blocking the E2F pathway would have therapeutic potential. To test this hypothesis, we have examined the activity of HLM006474 (a small molecule pan-E2F inhibitor) in lung cancer cell lines as a single agent and in combination with other compounds. HLM006474 reduces the viability of both SCLC and NSCLC lines with a biological IC50 that varies between 15 and 75 µM, but with no significant difference between the groups. Combination of HLM006474 with cisplatin and gemcitabine demonstrate little synergy; however, HLM006474 synergizes with paclitaxel. Surprisingly, we discovered that brief treatment of cells with HLM006474 led to an increase of E2F3 protein levels (due to de-repression of these promoter sites). Since paclitaxel sensitivity has been shown to correlate with E2F3 levels, we hypothesized that HLM006474 synergy with paclitaxel may be mediated by transient induction of E2F3. To test this, H1299 cells were depleted of E2F3a and E2F3b with siRNA and treated with paclitaxel. Assays of proliferation showed that both siRNAs significantly reduced paclitaxel sensitivity, as expected. Taken together, these results suggest that HLM006474 may have efficacy in lung cancer and may be useful in combination with taxanes.
A small-molecule E2F inhibitor blocks growth in a melanoma culture model
Cancer Res 2008 Aug 1;68(15):6292-9.PMID:18676853DOI:10.1158/0008-5472.CAN-08-0121.
HLM006474 was identified using a computer-based virtual screen and the known crystal structure of the DNA-bound E2F4/DP2 heterodimer. Treatment of multiple cell lines with HLM006474 resulted in the loss of intracellular E2F4 DNA-binding activity as measured by electrophoretic mobility shift assay within hours. Overnight exposure to HLM006474 resulted in down-regulation of total E2F4 protein as well as known E2F targets. The effects of HLM006474 treatment on different cell lines varied but included a reduction in cell proliferation and an increase in apoptosis. HLM006474 induced apoptosis in a manner distinct from cisplatin and doxorubicin. E2F4-null mouse embryonic fibroblasts were less sensitive than wild-type counterparts to the apoptosis-inducing activity of the compound, revealing its biological specificity. A375 cells were extremely sensitive to the apoptosis-inducing activity of the compound in two-dimensional culture, and HLM006474 was a potent inhibitor of melanocytes proliferation and subsequent invasion in a three-dimensional tissue culture model system. Together, these results suggest that interference with E2F activity using small molecules may have clinical application in cancer therapy.
Inhibition of Skp2 sensitizes lung cancer cells to paclitaxel
Onco Targets Ther 2017 Jan 18;10:439-446.PMID:28176922DOI:10.2147/OTT.S125789.
S-phase kinase-associated protein 2 (Skp2) is an E3 ubiquitin ligase and plays an important role in the control of cell cycle progression. Skp2 is upregulated in several cancers, including lung cancers, but the role of Skp2 in the tumorigenesis and anticancer drug resistance in human lung cancer remains to be determined. We report here that Skp2 positively regulated mitotic arrest deficient 2 (MAD2) expression and that inhibition of Skp2 sensitizes human lung cancer cells to paclitaxel. Knockdown of Skp2 by small interfering RNA (siRNA) decreased Mad2 messenger RNA (mRNA) and protein levels in A549 and NCI-H1975 cells, accompanied with upregulation of p27 but decrease of the phosphorylation of retinoblastoma (Rb). In contrast, ectopic overexpression of Skp2 increased Mad2 mRNA and protein levels and phosphorylation of Rb, while it decreased p27. Pharmacological inhibition of CDK1/2 by flavopiridol or E2F1 with HLM006474 led to downregulation of Mad2 expression and prevented the increase of Mad2 expression by Skp2. Most importantly, pharmacological inhibition of Skp2 sensitized A549 and NCI-H1299 cells to paclitaxel. Our results demonstrated that SKP2 positively regulates the gene expression of MAD2 through p27-CDKs-E2F1 signaling pathway and that inhibition of Skp2 sensitizes A549 and NCI-H1299 cells to paclitaxel, suggesting that small molecule inhibitors of Skp2 are potential agents for the treatment of lung cancer with upregulation of Skp2.
Established and new mouse models reveal E2f1 and Cdk2 dependency of retinoblastoma, and expose effective strategies to block tumor initiation
Oncogene 2012 Nov 29;31(48):5019-28.PMID:22286767DOI:10.1038/onc.2011.654.
RB(+/-) individuals develop retinoblastoma and, subsequently, many other tumors. The Rb relatives p107 and p130 protect the tumor-resistant Rb(-/-) mouse retina. Determining the mechanism underlying this tumor suppressor function may expose novel strategies to block Rb pathway cancers. p107/p130 are best known as E2f inhibitors, but here we implicate E2f-independent Cdk2 inhibition as the critical p107 tumor suppressor function in vivo. Like p107 loss, deleting p27 or inactivating its Cdk inhibitor (CKI) function (p27(CK-)) cooperated with Rb loss to induce retinoblastoma. Genetically, p107 behaved like a CKI because inactivating Rb and one allele each of p27 and p107 was tumorigenic. Although Rb loss induced canonical E2f targets, unexpectedly p107 loss did not further induce these genes, but instead caused post-transcriptional Skp2 induction and Cdk2 activation. Strikingly, Cdk2 activity correlated with tumor penetrance across all the retinoblastoma models. Therefore, Rb restrains E2f, but p107 inhibits cross talk to Cdk. While removing either E2f2 or E2f3 genes had little effect, removing only one E2f1 allele blocked tumorigenesis. More importantly, exposing retinoblastoma-prone fetuses to small molecule inhibitors of E2f (HLM006474) or Cdk (R547) for merely 1 week dramatically inhibited subsequent tumorigenesis in adult mice. Protection was achieved without disrupting normal proliferation. Thus, exquisite sensitivity of the cell-of-origin to E2f and Cdk activity can be exploited to prevent Rb pathway-induced cancer in vivo without perturbing normal cell division. These data suggest that E2f inhibitors, never before tested in vivo, or CKIs, largely disappointing as therapeutics, may be effective preventive agents.