Pifithrin-μ
(Synonyms: NSC 303580) 目录号 : GC11065
Inhibitor of p53-mediated apoptosis
Cas No.:64984-31-2
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
- View current batch:
- Purity: >98.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
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Cell experiment: |
The cell viability is determined by the Cell Counting Kit-8 assay. Briefly, A549 and H460 cells are incubated in 96-well plates at a density of 5 × 103 per 100 µL of culture medium overnight. After treated with indicated concentration of Pifithrin-μ for 24 and 48 h, 10 µL of tetrazolium substrate are added to each well of the plate. After incubation at 37°C for 1 h, the absorbance is recorded at a wavelength of 450 nm using a microplate reader. Each experiment is determined in triplicate and repeated at least three times[2]. |
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Animal experiment: |
Mice[2]A549 cells (1 × 107) are suspended in Matrigel and inoculated subcutaneously into the mice. Twelve mice bearing evident tumors are arbitrarily assigned to PBS control group and Pifithrin-μ treatment groups (six mice per group). When tumors reach a size of ∼5×5 mm2, mice are treated with either a single of intraperitoneal injection of Pifithrin-μ (20 mg/kg) or PBS every two days. After 3-week treatment, mice are euthanized with carbon dioxide. Tumor burdens are evaluated by measuring body weight, tumor weight, and tumor volume. Tumor volume is determined as 0.5 × length × width2. Tumor samples are collected and fixed in 10% neutral buffered formalin. Hematoxylin and eosin staining and immunohistochemistry for histological analysis of tumor samples are measured[2]. |
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References: [1]. Strom E, et al. Small-molecule inhibitor of p53 binding to mitochondria protects mice from gamma radiation. Nat Chem Biol. 2006 Sep;2(9):474-9. Epub 2006 Jul 23. |
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Pifithrin-μ is a potent inhibitor of p53 binding and p53-mediated apoptosis with Kd value of 0.82 mM in vitro[1].
The p53 is encoded in humans by the TP53 gene. The molecular mass of p53 is 53 KD. The p53 has the function of regulating the cell cycle, thus, it functions as preventing cancer, a tumor suppressor. The p53 plays an important role in apoptosis, inhibition of angiogenesis and genomic stability by activating DNA repair proteins, arresting cell growth though holding the cell cycle and initiating apoptosis. p53 becomes activated in response to DNA damage, osmotic shock, oxidative stress or other myriad stressors. Activated p53 activates the expression of several genes by binding DNA including p21. p21 binds to the G1-S/CDK complexes which is an important molecules for the G1/S transition, then causes cell cycle arrest. The increasing amount of p53 may be a solution for prevention of tumors spreading or treatment of them[1].
Pifithrin-μis a cell-permeable inhibitor of p53-binding and p53-mediated apoptosis. Pifithrin-μdirectly inhibits that p53 binds to mitochondria. Pifithrin-μ also inhibits p53 binds to Bcl-2 and Bcl-xL proteins. PFT-μbinds both Bcl-xL and p53 with Kd = 0.80 mM and 0.82 mM respectively.[1] Pifithrin-μ reduces apoptosis which triggered by nutlin-3 in ML-1 cells at 25μM [2]. Pifithrin-μ also selectively inhibits heat shock protein 70 (HSP 70) activity.
Pre-treatment with Pifithrin-μcan rescue primary thymocytes from γ-irradiation or DNA damaging agents in mice.[2]
References:
[1]. Hagn F, Klein C, Demmer O, Marchenko N, Vaseva A, Moll UM, Kessler H: BclxL changes conformation upon binding to wild-type but not mutant p53 DNA binding domain. J Biol Chem 2010, 285(5):3439-3450.
[2]. Vaseva AV, Marchenko ND, Moll UM: The transcription-independent mitochondrial p53 program is a major contributor to nutlin-induced apoptosis in tumor cells. Cell Cycle 2009, 8(11):1711-1719.
| Cas No. | 64984-31-2 | SDF | |
| 别名 | NSC 303580 | ||
| 化学名 | 2-phenylethynesulfonamide | ||
| Canonical SMILES | C1=CC=C(C=C1)C#CS(=O)(=O)N | ||
| 分子式 | C8H7NO2S | 分子量 | 181.21 |
| 溶解度 | ≥ 18.1mg/mL in DMSO, ≥ 93.8 mg/mL in EtOH | 储存条件 | Store at -20°C,stored under nitrogen |
| 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。 |
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| 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 | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 5.5185 mL | 27.5923 mL | 55.1846 mL |
| 5 mM | 1.1037 mL | 5.5185 mL | 11.0369 mL |
| 10 mM | 0.5518 mL | 2.7592 mL | 5.5185 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。