Product IntroductionBioactivity英文名:
Brusatol描述: Brusatol (NSC-172924) 是一種從鴉膽子植物中分離出來的天然產物,抑制Nrf2通路,可使多種癌細胞對 Cisplatin 和其他化療藥物敏感。它可開發(fā)為輔助化療化合物,可增加細胞凋亡。
細胞實驗: CT-26 cells in logarithmic growth are seeded onto a 96-well plate at a density of 4×10^3 cells/well. After 24 h of incubation at 37°C, fresh medium containing a series of concentrations of Brusatol (0.05, 0.15, 0.45, 1.35, 4.05 and 12.15 μg/mL) and CDDP (0.05, 0.15, 0.45, 1.35, 4.05 and 12.15 μg/mL) is added at 100 μL/well; each concentration is used to treat six replicate wells. After 48 h of incubation at 37°C, the cells are further incubated with MTT (10 mg/mL) at 37°C for 4 h. The supernatant is then removed and the precipitate is dissolved with 100 μL DMSO. Absorbance is measured using a microplate reader at a wavelength of 490 nm. Cytotoxicity is expressed as the concentration of Brusatol and CDDP that inhibit cell growth by 50% (IC50 value). The inhibitory rate is calculated. The possible synergistic effect of Brusatol combined with CDDP is investigated by exposing CT-26 cells to various concentrations of each agent alone or in combination for 48 h [2].
動物實驗: Athymic nude mice are used. Mice 4-6 wk old are injected with A549 cells. Once the tumors reached 80 mm3 (for the two times five-time Cisplatin treatment regimen) or 280 mm3 (for the single five-time Cisplatin treatment regime), mice are randomly allocated into four groups and treated i.p. with DMSO, Cisplatin (2 mg/kg), Brusatol (2 mg/kg), or in combination every other day for a total of five times. After the initial five-time Cisplatin treatment regimen, treatment stops for 1 wk to allow mice to recover before the second five-time Cisplatin treatment regimen is repeated [3].
體外活性: Brusatol 通過一種不依賴于 Keap1、蛋白酶體和自噬蛋白降解系統的機制,引發(fā) Nrf2 的消耗。在小鼠 Hepa-1c1c7 肝癌細胞中,Brusatol 通過一種轉錄后機制迅速且短暫地引起 Nrf2 蛋白的消耗。Brusatol 也能抑制新鮮分離的原代人肝細胞中的 Nrf2 [1]。CT-26 細胞分別單獨或聯合應用不同濃度的 Brusatol(0.05、0.15、0.45、1.35、4.05 和 12.15 μg/mL)和 CDDP(0.05、0.15、0.45、1.35、4.05 和 12.15 μg/mL)處理 48 小時。經 Brusatol 和 CDDP 處理 48 小時后,CT-26 細胞的存活率呈劑量依賴性降低,其 IC50 值分別為 0.27±0.01 和 1.44±0.22 μg/mL。當 Brusatol 與 CDDP 以 1:1 的恒定濃度比聯合應用時,細胞生長抑制明顯增強,合用治療的 IC50 值為 0.19±0.02 μg/mL [2]。
體內活性: 裸鼠被注射A549細胞以誘導腫瘤生長,隨后進行一次每千克體重2 mg的Brusatol腹腔注射。在注射后24小時或48小時,將腫瘤組織分離出來。發(fā)現Nrf2蛋白水平在注射后24小時或48小時顯著降低,表明Brusatol能夠達到腫瘤組織并抑制Nrf2途徑。在第一次實驗中,一旦腫瘤體積達到平均230 mm3,將DMSO、Brusatol(每千克體重2 mg)、Cisplatin(每千克體重2 mg)或Cisplatin(每千克體重2 mg)與Brusatol(每千克體重2 mg)聯合治療通過腹腔注射,每隔一天一次,共五次。Cisplatin或Brusatol單獨使用未能顯著抑制腫瘤生長,而在聯合治療組中,腫瘤體積顯著減小[3]。
存儲條件: Powder: -20°C for 3 years | In solvent: -80°C for 1 year
溶解度: H2O : Insoluble
DMSO : 90 mg/mL (172.9 mM)
關鍵字:
Nrf2 |
oxygen |
CT-26 |
defense |
stress |
Keap1-Nrf2 |
Brusatol |
chemosensitization |
Toxicity |
NSC-172924 |
species |
radicals |
reactive |
Chemical |
response |
cisplatin |
synergistic effect |
Hepatocyte |
Keap1 |
antioxidant |
Cell |
Free |
Inhibitor |
inhibit |
NSC172924 |
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(-)-Epicatechin |
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BAY 87-2243相關庫:
Anti-Tumor Natural Product Library |
Terpene Natural Product Library |
Covalent Natural Product Library |
Ferroptosis Compound Library |
Human Metabolite Library |
Inhibitor Library |
Traditional Chinese Medicine Monomer Library |
Anti-Cancer Active Compound Library |
Antiparasitic Natural Product Library |
Covalent Inhibitor Librarybio-equip.com
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