L-685,458
mRNA synthesis
In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
Tyramide Signal Amplification (TSA)
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Phos Binding Reagent Acrylamide
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
Cell Counting Kit-8 (CCK-8)
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
SYBR Safe DNA Gel Stain
Safe and sensitive stain for visualization of DNA or RNA in agarose or acrylamide gels.
Inhibitor Cocktails
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
L-685,458是γ分泌酶的强效选择性抑制剂,IC50值为17 nM[1]。
γ分泌酶是切割许多I型膜蛋白的膜内裂解天冬氨酸蛋白酶之一,许多具有重要的生物学功能。γ分泌酶是多亚基蛋白酶,包含presenilin、nicastrin、APH-1(Anterior Pharynx- defective 1) 和 PEN-2。Presenilin包含嵌入在第六和第七跨膜结构域的Asp258和Asp385,并形成活性位点。作为膜整合蛋白酶复合体,γ分泌酶很难被纯化来研究其机理。γ分泌酶促进蛋白前体蛋白转变为Aβ。γ分泌酶被认为是阿尔茨海默氏病重要的药物靶标。γ-分泌酶还参与Notch的加工,其与癌症相关,如白血病。
L-685,458是一种过渡态类似物抑制剂。它是一个γ分泌酶的pan-抑制剂,减少Aβ(42)和Aβ(40)多肽的生成。体外细胞膜实验表明,与天冬氨酰、丝氨酸和半胱氨酸蛋白酶相比,L-685,458对γ分泌酶具有50倍的选择性或更大的抑制作用。在人原代神经元细胞中,L-685,458减少Aβ40 和Aβ42的生成, IC50值分别为115 nM和200 nM[2]。在过表达人APP751的HEK 293中使用ELISA测定分泌的总Aβ的含量,发现L-685458抑制γ分泌酶活性的IC50值约为5 nM。
在PDAPP中,100 mg/kg L-685458以剂量依赖的方式将皮质中总Aβ减少了50%,皮质中Aβ42也出现类似的减少。在人APPV717F突变转基因Tg2576小鼠中,L-685,458口服给药减少脑中Aβ的水平[3]。L-685458也抑制Notch信号,进而影响斑马鱼胚胎的胚胎发育[4]。
参考文献:
1. Shearman MS, Beher D, Clarke EE, Lewis HD, Harrison T, Hunt P, Nadin A, Smith AL, Stevenson G, Castro JL: L-685,458, an aspartyl protease transition state mimic, is a potent inhibitor of amyloid beta-protein precursor gamma-secretase activity. Biochemistry 2000, 39(30):8698-8704.
2.Dovey HF, John V, Anderson JP, Chen LZ, de Saint Andrieu P, Fang LY, Freedman SB, Folmer B, Goldbach E, Holsztynska EJ et al: Functional gamma-secretase inhibitors reduce beta-amyloid peptide levels in brain. J Neurochem 2001, 76(1):173-181.
3.Lanz TA, Himes CS, Pallante G, Adams L, Yamazaki S, Amore B, Merchant KM: The gamma-secretase inhibitor N-[N-(3,5-difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester reduces A beta levels in vivo in plasma and cerebrospinal fluid in young (plaque-free) and aged (plaque-bearing) Tg2576 mice. J Pharmacol Exp Ther 2003, 305(3):864-871.
4.Geling A, Steiner H, Willem M, Bally-Cuif L, Haass C: A gamma-secretase inhibitor blocks Notch signaling in vivo and causes a severe neurogenic phenotype in zebrafish. EMBO Rep 2002, 3(7):688-694.
Physical Appearance | White solid |
Storage | Store at -20°C |
M.Wt | 672.85 |
Cas No. | 292632-98-5 |
Formula | C39H52N4O6 |
Solubility | ≥33.65 mg/mL in DMSO; insoluble in H2O; insoluble in EtOH |
Chemical Name | tert-butyl N-[(2S,3R,5R)-6-[[(2S)-1-[[(2S)-1-amino-1-oxo-3-phenylpropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-5-benzyl-3-hydroxy-6-oxo-1-phenylhexan-2-yl]carbamate |
SDF | Download SDF |
Canonical SMILES | CC(C)CC(C(=O)NC(CC1=CC=CC=C1)C(=O)N)NC(=O)C(CC2=CC=CC=C2)CC(C(CC3=CC=CC=C3)NC(=O)OC(C)(C)C)O |
运输条件 | 蓝冰运输或根据您的需求运输。 |
一般建议 | 不同厂家不同批次产品溶解度各有差异,仅做参考。若实验所需浓度过大至产品溶解极限,请添加助溶剂助溶或自行调整浓度。溶液形式一般不宜长期储存,请尽快用完。 |
细胞实验 [1-4]: | |
细胞系 |
HeLa和SiHa细胞,SGHPL-5细胞 |
溶解方法 |
该化合物在DMSO中的溶解度大于10 mM。若获取更高浓度的溶液,可在37℃下孵育10分钟,随后在超声波浴中摇匀。-20℃以下可储存数月。 |
反应条件 |
48小时 |
应用 |
在HeLa和SiHa细胞中,L-685,458(8 μM)阻断Notch活化。在L-685,458处理的细胞中,Hes1核易位受阻,诱导大约6.63%的HeLa和9.03%的SiHa细胞凋亡。L-685,458(10 μM,3天)抑制Notch途径并引起卵母细胞在pachytene阶段的积累,减少能够达到双线期的卵母细胞数量。在SGHPL-5细胞中,L-685,458抑制了经典的notch活性。L-685,458显著增加BrdU标记的原代CTB细胞的量。L-685,458增加SGHPL-5细胞的迁移。L-685,458(10 μM,48小时)强烈增加非增殖性EVT的运动性。在WT小鼠和AD Tg小鼠原代神经元中,L-685,458(0.5 μM)减弱了异氟醚诱导的Tau-PS262水平的增加。 |
注意事项 |
由于实验环境的不同,实际溶解度可能与理论值略有不同,请测试室内所有化合物的溶解度。 |
References: [1]. Zhang P, Li H, Yang B, et al. Biological significance and therapeutic implication of resveratrol-inhibited Wnt, Notch and STAT3 signaling in cervical cancer cells[J]. Genes & cancer, 2014, 5(5-6): 154. [2]. Feng Y M, Liang G J, Pan B, et al. Notch pathway regulates female germ cell meiosis progression and early oogenesis events in fetal mouse[J]. Cell Cycle, 2014, 13(5): 782-791. [3]. Haider S, Meinhardt G, Velicky P, et al. Notch signaling plays a critical role in motility and differentiation of human first-trimester cytotrophoblasts[J]. Endocrinology, 2014, 155(1): 263-274. [4]. Dong Y, Wu X, Xu Z, et al. Anesthetic isoflurane increases phosphorylated tau levels mediated by caspase activation and Aβ generation[J]. PloS one, 2012, 7(6): e39386. |
质量控制和MSDS
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