LDN-57444 是一种可逆的，竞争性的，定向位点的泛素

LDN-57444 

LDN-57444 是一种可逆的，竞争性的，定向位点的泛素 C 末端水解酶 L1 (UCH-L1) 抑制剂，IC₅₀ 和 K_i 值分别为 0.88 μM 和 0.40 μM；LDN-57444 同时可抑制 UCH-L3 的活性，IC₅₀ 值为 25 μM。

美国medchemexpress（MCE)浙江省一级代理:杭州昊鑫生物科技股份有限公司
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生物活性    
LDN-57444 is a reversible, competitive and site-directed inhibitor of ubiquitin C-terminal hydrolase L1 (UCH-L1), with an IC50 of 0.88 μM and a Ki of 0.40 μM; LDN-57444 also suppresses UCH-L3 activity, with an IC50 of 25 μM.

IC50 & Target    
IC50: 0.88 μM (UCH-L1), 25 μM (UCH-L3)[1]
Ki: 0.40 μM (UCH-L1)[1]

体外研究(In Vitro)    
LDN-57444 is a reversible, competitive inhibitor of UCH-L1, with an IC50 of 0.88 μM, and also suppresses UCH-L3 activity, with an IC50 of 25 μM[1]. LDN-57444 (LDN, 5 μM for 1 hr) inhibits 70% of Uch activity in hippocampal slices of the mouse brain. LDN-57444 (5 μM for 2 hr) does not reduce potentiation further in APP/PS1 slices or in wt slices exposed to 200 nM Aβ[2]. LDN-57444 (25-100 μM) inhibits ubiquitin-proteasome activity dose-dependently in SK-N-SH cells. LDN-57444 (50 μM) also induces apoptotic cell death, causes the endoplasmic reticulum stress and results in expression of spliced XBP-1(XBP-1s, 48KD) in SK-N-SH cells[3].

体内研究(In Vivo)    
LDN-57444 (0.4 mg/kg, i.p.) blocks the beneficial effect of V-Uch-L1, and worsens contextual conditioning performance as the mice are exposed to the context at 1, 7, 14, and 21 days after training[2].

分子量    
397.64

性状    
Solid

Formula    
C17H11Cl3N2O3

CAS 号    
668467-91-2

运输条件    
Room temperature in continental US; may vary elsewhere.

储存方式    
Powder    -20°C    3 years
4°C    2 years
In solvent    -80°C    6 months
-20°C    1 month
溶解性数据    
In Vitro: 
DMSO : 25 mg/mL (62.87 mM; Need ultrasonic)

配制储备液    
浓度溶剂体积质量    1 mg    5 mg    10 mg
1 mM    2.5148 mL    12.5742 mL    25.1484 mL
5 mM    0.5030 mL    2.5148 mL    5.0297 mL
10 mM    0.2515 mL    1.2574 mL    2.5148 mL
*
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, 6 months; -20°C, 1 month。-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。

In Vivo:
请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液，再依次添加助溶剂：

——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用； 以下溶剂前显示的百分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

1.
请依序添加每种溶剂： 10% DMSO    90% corn oil

Solubility: ≥ 2.5 mg/mL (6.29 mM); Clear solution
 

参考文献

[1]. Liu Y, et al. Discovery of inhibitors that elucidate the role of UCH-L1 activity in the H1299 lung cancer cell line. Chem Biol. 2003 Sep;10(9):837-46.  [Content Brief] [2]. Gong B, et al. Ubiquitin hydrolase Uch-L1 rescues beta-amyloid-induced decreases in synaptic function and contextual memory. Cell. 2006 Aug 25;126(4):775-88.  [Content Brief] [3]. Tan YY, et al. Endoplasmic reticulum stress contributes to the cell death induced by UCH-L1 inhibitor. Mol Cell Biochem. 2008 Nov;318(1-2):109-15.  [Content Brief]