CAS |
208255-80-5 |
Chinese Name |
(2S)-N-[N-(3,5-二氟苯乙酰基)-L-丙氨酰]-2-苯基甘氨酸叔丁酯 |
English Name |
DAPT |
Synonyms |
GSI-IX;pelargonidin3-O-beta-D-glucoside;Callistephinchlo; |
Molecular Formula |
C23H26F2N2O4 |
Molecular Weight |
432.46 |
Solubility |
Soluble in DMSO ≥15mg/mL |
Purity |
HPLC≥98% |
Appearance |
White to off-white Solid |
Storage |
Powder:2-8℃,2 years;Insolvent(Mother Liquid):-20℃,6 months;-80℃,1 year |
MDL |
MFCD00055267 |
SMILES |
FC1=CC(F)=CC(CC(N[C@H](C(N[C@H](C(OC(C)(C)C)=O)C2=CC=CC=C2)=O)C)=O)=C1 |
InChIKey |
DWJXYEABWRJFSP-XOBRGWDASA-N |
InChI |
InChI=1S/C23H26F2N2O4/c1-14(26-19(28)12-15-10-17(24)13-18(25)11-15)21(29)27-20(16-8-6-5-7-9-16)22(30)31-23(2,3)4/h5-11,13-14,20H,12H2,1-4H3,(H,26,28)(H,27,29)/t14-,20-/m0/s1 |
PubChem CID |
5311272 |
Target Point |
Notch;γ-secretase;Autophagy;Apoptosis |
Passage |
Stem Cells;Neuronal Signaling;Autophagy;Apoptosis; |
Background |
DAPT is a potent gamma-secretase inhibitor that inhibits Notch 1 signaling and induces cell differentiation. It can also induce autophagy and apoptosis. It has neuroprotective activity. |
Biological Activity |
DAPT是 γ-分泌酶 (γ-secretase) 抑制剂,抑制总 Aβ 和 Aβ42 的 IC50 分别为 115 和 200 nM[5]。 |
IC50 |
115nM(Aβ),200nM(Aβ42)[5] |
In Vitro |
DAPT抑制Aβ产生超过90%,仅影响培养基中APPβ的适度降低。尽管通过DAPT处理APPβ减少了约30%,但这种效应不依赖于浓度,并且通过去除DAPT而逆转[1]。用递增浓度的DAPT(0,25,50和75μM)处理CNE-2细胞,48小时后γ-分泌酶产生的Notch1片段Val1744-NICD以剂量依赖性方式降低(P <0.01)。)。在50μM浓度下,DAPT几乎完全抑制了γ-分泌酶的激活[2]。 |
In Vivo |
向PDAPP小鼠(100mg/kg sc)施用DAPT,并在脑皮质中检查DAPT和Aβ的水平。治疗3小时后脑中达到490ng/g的峰值DAPT水平,并且在最初的18小时内持续大于100ng/g(~200nM)的水平。 DAPT的这些脑浓度超过其降低神经元培养物中Aβ的IC50(115 nM),并导致强大且持续的药效学效应[1]。 DAPT通过下调大鼠Notch 1和核因子κB的表达来保护脑免受脑缺血。蛋白质印迹分析还显示DAPT(0.03 mg/kg)组中Notch 1和NF-κB表达显著降低(与MCAO组相比,P <0.05)[3]。 |
Cell Experiment |
用APP751(HEK 293)基因转染的人胚肾细胞用于常规Aβ还原测定。将细胞接种在96孔板中,并使其在补充有10%热灭活的胎牛血清的Dulbecco改良的Eagle培养基(DMEM)中粘附过夜。将细胞在37℃下用DAPT(0,0.4,2,10,50和250nM)预处理2小时,吸出培养基并施加新的化合物溶液。在另外2小时的处理期后,取出条件培养基并通过对总Aβ特异的夹心ELISA(266-3D6)进行分析。相对于用0.1%DMSO处理的对照细胞测量Aβ产生的减少,并表示为抑制百分比。使用XLfit软件将来自至少六个剂量的一式两份的数据拟合至四参数逻辑模型以确定效力[1]。 |
Animal Experiment |
小鼠[1]过量表达APPV717F突变形式的淀粉样蛋白前体蛋白的三至四个月大的杂合PDAPP转基因小鼠。每个治疗组(n = 10)由相同数量的年龄匹配的雄性和雌性动物组成,其在治疗前禁食过夜。治疗组和对照组均以DAPT或单独的载体以10mL/kg的体积给药。处理组织并进行所有Aβ和APP测量。去除脑后,将来自一个半球的皮质匀浆,用5M胍,50mM Tris-pH 8.0提取,离心,并将上清液用于Aβ测量。来自另一个半球的皮质被快速冷冻以分析化合物水平。 Aβ水平表示为湿组织重量的ng/g,并且相对于来自媒介物处理的对照动物的组织的平均Aβ水平计算减少百分比。使用Mann-Whitney非参数统计分析数据以评估显著性。大鼠[3]使用雄性Sprague-Dawley大鼠(260-290g)。在MCAO后立即将DAPT溶液立体定向注射到侧脑室(LV)中。 LV的立体定向注射在前囟前后坐标-0.8mm,前外侧±1.5mm和前房-4.5mm处进行。将30只大鼠随机分配到3个手术组(每组10只大鼠):假手术组,接受等体积的PBS,不进行MCAO手术;在MCAO(MCAO)之后接受等体积PBS的MCAO组;在MCAO后接受DAPT为0.03 mg/kg的DAPT组和DAPT组。术后24小时评估第一神经功能,然后在术后48小时评估第二神经功能。同时测量并比较不同组之间的脑水含量和梗死体积。 |
Data Literature Source |
[1]. Dovey HF,et al. Functional gamma-secretase inhibitors reduce beta-amyloid peptide levels in brain. J Neurochem. 2001 Jan;76(1):173-81. [2]. Zhou JX,et al. γ-secretase inhibition combined with cisplatin enhances apoptosis of nasopharyngeal carcinoma cells.Exp Ther Med. 2012 Feb;3(2):357-361. [3]. Li S,et al. DAPT protects brain against cerebral ischemia by down-regulating the expression of Notch 1 and nuclear factor κB in rats. Neurol Sci. 2012 Dec;33(6):1257-64. [4]. Tanimizu N,et al. Intrahepatic bile ducts are developed through formation of homogeneous continuous luminal network and its dynamic rearrangement in mice. Hepatology. 2016 Jul;64(1):175-88. [5]. Michael T. Chang,et al. Notch Drives Proliferation And Radiation Resistance Of Cancer Stem Cells In Adenoid Cystic Carcinoma. Yale University. January 2016. [6]. Majumder S,et al. Shifts in podocyte histone H3K27me3 regulate mouse and human glomerular disease. J Clin Invest. 2018 Jan 2;128(1):483-499. [7]. Yixin Tao,et al. β-catenin activation in hair follicle dermal stem cells induces ectopic hair outgrowth and skin fibrosis. J Mol Cell Biol. 2018 May 16. |
Unit |
Bottle |
Specification |
5mg 10mM*1mL in DMSO 10mg |