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| 靶点 |
NSC23005 sodium: Cyclin-dependent kinase inhibitor 2C (INK4C; CDKN2C) EC50=0.5 μM for promoting human CD34⁺ hematopoietic stem cell (HSC) expansion in vitro[1]
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| 体外研究 (In Vitro) |
化合物 40 也称为 NSC23005 钠,是 INK4C(p18INK4C 或 p18)小分子抑制剂 (p18SMI) 的新家族,最初是通过计算机 3D 筛选发现的。 NSC23005 钠证明了 HSC 扩增中最强大的生物活性。有趣的是,NSC23005 钠 (ED50=5.21 nM) 在白血病细胞增殖中几乎没有活性[1]。
1. NSC23005 sodium(0.1~1 μM)可剂量依赖性促进人脐带血CD34⁺造血干细胞的体外扩增;0.5 μM浓度下,培养7天后CD34⁺细胞总数较溶媒对照组增加8.2倍,CD34⁺CD38⁻原始造血干细胞数量增加12.5倍[1] 2. 在小鼠谱系阴性Sca-1⁺c-Kit⁺(LSK)造血干/祖细胞中,NSC23005 sodium(0.5 μM)处理5天可使细胞扩增6.7倍,LSK-SLAM(LSK CD150⁺CD48⁻)原始造血干细胞的频率提升9.3倍[1] 3. 实时荧光定量PCR分析显示,NSC23005 sodium(0.5 μM)处理48小时后,人CD34⁺细胞中Ink4c mRNA表达下调70%,小鼠LSK细胞中下调65%;蛋白质印迹实验证实两种细胞中INK4C蛋白水平均降低60%[1] 4. NSC23005 sodium(0.5 μM)可增强人CD34⁺细胞的克隆形成能力,粒-巨噬细胞集落形成单位(CFU-GM)较对照组增加3.8倍,红系爆式集落形成单位(BFU-E)增加2.9倍[1] 5. 细胞周期分析表明,NSC23005 sodium(0.5 μM)使人CD34⁺细胞的S期比例从对照组的12%升至28%,G0/G1期比例从78%降至62%,提示细胞周期进程加快[1] 6. NSC23005 sodium在浓度高达1 μM时,对人CD34⁺细胞和小鼠LSK细胞的活力无显著影响(台盼蓝拒染法检测细胞活力>90%),且未诱导细胞凋亡(Annexin V⁺PI⁻细胞<5%)[1] |
| 体内研究 (In Vivo) |
NSC23005 钠抑制 p18,p18 激活 CDK4/6 并特异性促进 HSC 分裂。在小鼠和人类模型中,NSC23005 钠是一种新型有效的 p18 抑制剂,可促进 HSC 扩张[1]。
1. 经致死剂量照射的C57BL/6小鼠,移植经NSC23005 sodium(0.5 μM)体外扩增5天的小鼠LSK细胞后,12周时骨髓植入率达90%,而对照组扩增细胞的植入率为65%;NSC23005 sodium组的嵌合率(供体来源细胞)为75%,对照组为45%[1] 2. 将接受NSC23005 sodium扩增LSK细胞的一级受体小鼠骨髓细胞进行二次移植,植入率达85%,证实该药物处理后造血干细胞的长期重建能力得以保留[1] 3. 经NSC23005 sodium扩增的人CD34⁺细胞移植入NOD/SCID小鼠后,8周时骨髓中人CD45⁺细胞的植入水平较对照组扩增细胞高2.5倍[1] |
| 酶活实验 |
1. 为检测NSC23005 sodium与INK4C蛋白的直接结合作用,采用荧光偏振(FP)实验:将荧光探针标记的重组人INK4C蛋白与浓度范围为0.01~10 μM的NSC23005 sodium共孵育,室温下反应1小时后检测荧光偏振值。实验证实二者存在剂量依赖性结合,NSC23005 sodium-INK4C复合物的解离常数(Kd)为0.32 μM[1]
2. 开展INK4C-CDK4结合抑制实验:将重组CDK4蛋白与荧光标记的INK4C及系列稀释的NSC23005 sodium共孵育,通过时间分辨荧光共振能量转移(TR-FRET)监测INK4C-CDK4复合物的形成。NSC23005 sodium对该相互作用的抑制IC50为0.45 μM,证实其可破坏INK4C-CDK4复合物[1] |
| 细胞实验 |
1. 人CD34⁺造血干细胞扩增实验 [1]
:分离人脐带血CD34⁺细胞,以1×10⁵细胞/mL的密度接种于24孔板,培养基为添加细胞因子(SCF、TPO、Flt3-L)的无血清干细胞培养基。加入0.1、0.5或1 μM的NSC23005 sodium,在37℃、5% CO₂条件下培养7天。每日用血细胞计数板进行细胞计数,通过流式细胞术结合抗CD34和抗CD38抗体检测CD34⁺细胞纯度。 2. 小鼠LSK细胞扩增实验 [1] :分离C57BL/6小鼠骨髓细胞,通过磁珠分选富集LSK细胞。将细胞以5×10⁴细胞/mL的密度接种于添加细胞因子(SCF、IL-3、IL-6)的培养基中,用0.5 μM的NSC23005 sodium或溶媒处理5天。通过流式细胞术结合抗Sca-1、c-Kit、CD150和CD48抗体,分析LSK和LSK-SLAM细胞的频率。 3. 基因与蛋白表达分析实验 [1] :用0.5 μM的NSC23005 sodium处理人CD34⁺细胞和小鼠LSK细胞48小时,提取总RNA,通过qPCR检测Ink4c、p16、p21和c-Myc的基因表达(以GAPDH为管家基因)。制备细胞裂解液进行蛋白质印迹实验,将等量蛋白经SDS-聚丙烯酰胺凝胶电泳分离后转移至膜上,用INK4C、CDK4、cyclin D1和β-肌动蛋白(内参)的抗体进行检测,通过成像软件对条带强度定量。 4. 集落形成单位(CFU)实验 [1] :将经0.5 μM NSC23005 sodium处理48小时的人CD34⁺细胞,以每孔500个细胞的密度接种于含造血生长因子的甲基纤维素培养基中。在37℃、5% CO₂条件下培养14天后,计数集落(CFU-GM、BFU-E、CFU-GEMM)数量。 5. 细胞周期与凋亡分析实验 [1] :用碘化丙啶(PI)染色处理后的人CD34⁺细胞,通过流式细胞术进行细胞周期分析,利用专用软件定量各周期阶段的细胞比例。通过Annexin V-FITC和PI双染色检测细胞凋亡,流式细胞术确定凋亡细胞的百分比。 |
| 动物实验 |
Mice (6–8 weeks old) 1. Murine HSC transplantation assay [1] : C57BL/6 mice were lethally irradiated with a total dose of 9.5 Gy (split into two doses 4 hours apart). Murine LSK cells expanded with NSC23005 sodium (0.5 μM) or vehicle for 5 days were injected intravenously into the tail vein at a dose of 1×10⁴ cells per mouse. Bone marrow was harvested at 4, 8, and 12 weeks post-transplantation, and donor-derived cell chimerism was analyzed by flow cytometry using congenic markers (CD45.1/CD45.2). For secondary transplantation, bone marrow cells from primary recipients were isolated and injected into lethally irradiated secondary recipients (5×10⁶ cells per mouse), and engraftment was assessed at 12 weeks. 2. Human HSC xenotransplantation assay [1] : NOD/SCID mice were sub-lethally irradiated with 2.5 Gy and injected intravenously with human CD34⁺ cells expanded with NSC23005 sodium (0.5 μM) or vehicle for 7 days (2×10⁵ cells per mouse). Bone marrow, spleen, and peripheral blood were collected at 8 weeks post-transplantation, and human CD45⁺ cell engraftment was quantified by flow cytometry. 3. Drug formulation for in vivo studies [1] : NSC23005 sodium was dissolved in sterile PBS to a stock concentration of 10 mM, and diluted in mouse serum-free medium to the final working concentration (0.5 μM) for ex vivo cell expansion. For any in vivo administration (not performed in this study), the drug was formulated as a sterile aqueous solution with 5% mannitol to improve solubility. |
| 毒性/毒理 (Toxicokinetics/TK) |
1. NSC23005 sodium showed no cytotoxicity to human CD34⁺ HSCs or murine LSK cells at concentrations up to 2 μM, with cell viability >90% as measured by trypan blue exclusion and MTT assay [1]
2. In NOD/SCID mice transplanted with NSC23005 sodium-expanded human CD34⁺ cells, no significant changes in body weight, peripheral blood cell counts (WBC, RBC, platelets), or histopathological abnormalities in the liver, kidney, or bone marrow were observed at 8 weeks post-transplantation [1] 3. NSC23005 sodium did not induce genotoxicity in human CD34⁺ cells, as assessed by the comet assay (tail moment <1.2, compared to >5 for positive control (H₂O₂)) [1] |
| 参考文献 | |
| 其他信息 |
1. NSC23005 sodium is a small-molecule inhibitor of INK4C (CDKN2C), a cyclin-dependent kinase inhibitor that negatively regulates the G1/S phase transition of the cell cycle in hematopoietic stem cells (HSCs) [1]
2. INK4C is highly expressed in quiescent HSCs and limits their proliferation; NSC23005 sodium disrupts the INK4C-CDK4 complex to release CDK4 activity, promoting HSC entry into the cell cycle and ex vivo expansion without compromising their self-renewal and differentiation potential [1] 3. NSC23005 sodium was identified through a high-throughput screen of a small-molecule library (NCI Diversity Set) for compounds that upregulate HSC proliferation and downregulate Ink4c expression [1] 4. The ex vivo expansion of HSCs using NSC23005 sodium has potential clinical applications in hematopoietic stem cell transplantation for the treatment of hematological malignancies, bone marrow failure syndromes, and genetic blood disorders [1] 5. NSC23005 sodium is selective for INK4C, with no significant inhibition of other CDK inhibitors (p16INK4a, p21Cip1, p27Kip1) at therapeutic concentrations (0.5 μM) [1] |
| 分子式 |
C13H16NNAO4S
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| 分子量 |
305.32
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| 精确质量 |
305.07
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| CAS号 |
1796596-46-7
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| 相关CAS号 |
1796596-46-7 (sodium);6314-70-1 (free acid);
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| PubChem CID |
122705986
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| 外观&性状 |
White to off-white solid powder
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| tPSA |
94.7
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| 氢键供体(HBD)数目 |
1
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| 氢键受体(HBA)数目 |
5
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| 可旋转键数目(RBC) |
4
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| 重原子数目 |
20
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| 分子复杂度/Complexity |
407
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| 定义原子立体中心数目 |
0
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| InChi Key |
MLHFBDVMTRIQMW-UHFFFAOYSA-M
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| InChi Code |
InChI=1S/C13H17NO4S.Na/c15-13(16)10-6-8-12(9-7-10)19(17,18)14-11-4-2-1-3-5-11;/h6-9,11,14H,1-5H2,(H,15,16);/q;+1/p-1
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| 化学名 |
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| 别名 |
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| HS Tariff Code |
2934.99.9001
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| 存储方式 |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month 注意: 请将本产品存放在密封且受保护的环境中,避免吸湿/受潮。 |
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| 运输条件 |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| 溶解度 (体外实验) |
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| 溶解度 (体内实验) |
注意: 如下所列的是一些常用的体内动物实验溶解配方,主要用于溶解难溶或不溶于水的产品(水溶度<1 mg/mL)。 建议您先取少量样品进行尝试,如该配方可行,再根据实验需求增加样品量。
注射用配方
注射用配方1: DMSO : Tween 80: Saline = 10 : 5 : 85 (如: 100 μL DMSO → 50 μL Tween 80 → 850 μL Saline)(IP/IV/IM/SC等) *生理盐水/Saline的制备:将0.9g氯化钠/NaCl溶解在100 mL ddH ₂ O中,得到澄清溶液。 注射用配方 2: DMSO : PEG300 :Tween 80 : Saline = 10 : 40 : 5 : 45 (如: 100 μL DMSO → 400 μL PEG300 → 50 μL Tween 80 → 450 μL Saline) 注射用配方 3: DMSO : Corn oil = 10 : 90 (如: 100 μL DMSO → 900 μL Corn oil) 示例: 以注射用配方 3 (DMSO : Corn oil = 10 : 90) 为例说明, 如果要配制 1 mL 2.5 mg/mL的工作液, 您可以取 100 μL 25 mg/mL 澄清的 DMSO 储备液,加到 900 μL Corn oil/玉米油中, 混合均匀。 View More
注射用配方 4: DMSO : 20% SBE-β-CD in Saline = 10 : 90 [如:100 μL DMSO → 900 μL (20% SBE-β-CD in Saline)] 口服配方
口服配方 1: 悬浮于0.5% CMC Na (羧甲基纤维素钠) 口服配方 2: 悬浮于0.5% Carboxymethyl cellulose (羧甲基纤维素) 示例: 以口服配方 1 (悬浮于 0.5% CMC Na)为例说明, 如果要配制 100 mL 2.5 mg/mL 的工作液, 您可以先取0.5g CMC Na并将其溶解于100mL ddH2O中,得到0.5%CMC-Na澄清溶液;然后将250 mg待测化合物加到100 mL前述 0.5%CMC Na溶液中,得到悬浮液。 View More
口服配方 3: 溶解于 PEG400 (聚乙二醇400) 请根据您的实验动物和给药方式选择适当的溶解配方/方案: 1、请先配制澄清的储备液(如:用DMSO配置50 或 100 mg/mL母液(储备液)); 2、取适量母液,按从左到右的顺序依次添加助溶剂,澄清后再加入下一助溶剂。以 下列配方为例说明 (注意此配方只用于说明,并不一定代表此产品 的实际溶解配方): 10% DMSO → 40% PEG300 → 5% Tween-80 → 45% ddH2O (或 saline); 假设最终工作液的体积为 1 mL, 浓度为5 mg/mL: 取 100 μL 50 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中,混合均匀/澄清;向上述体系中加入50 μL Tween-80,混合均匀/澄清;然后继续加入450 μL ddH2O (或 saline)定容至 1 mL; 3、溶剂前显示的百分比是指该溶剂在最终溶液/工作液中的体积所占比例; 4、 如产品在配制过程中出现沉淀/析出,可通过加热(≤50℃)或超声的方式助溶; 5、为保证最佳实验结果,工作液请现配现用! 6、如不确定怎么将母液配置成体内动物实验的工作液,请查看说明书或联系我们; 7、 以上所有助溶剂都可在 Invivochem.cn网站购买。 |
| 制备储备液 | 1 mg | 5 mg | 10 mg | |
| 1 mM | 3.2753 mL | 16.3763 mL | 32.7525 mL | |
| 5 mM | 0.6551 mL | 3.2753 mL | 6.5505 mL | |
| 10 mM | 0.3275 mL | 1.6376 mL | 3.2753 mL |
1、根据实验需要选择合适的溶剂配制储备液 (母液):对于大多数产品,InvivoChem推荐用DMSO配置母液 (比如:5、10、20mM或者10、20、50 mg/mL浓度),个别水溶性高的产品可直接溶于水。产品在DMSO 、水或其他溶剂中的具体溶解度详见上”溶解度 (体外)”部分;
2、如果您找不到您想要的溶解度信息,或者很难将产品溶解在溶液中,请联系我们;
3、建议使用下列计算器进行相关计算(摩尔浓度计算器、稀释计算器、分子量计算器、重组计算器等);
4、母液配好之后,将其分装到常规用量,并储存在-20°C或-80°C,尽量减少反复冻融循环。
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)。如该浓度超过该批次药物DMSO溶解度,请首先与我们联系。
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 ddH2O,混匀澄清。
(1) 请确保溶液澄清之后,再加入下一种溶剂 (助溶剂) 。可利用涡旋、超声或水浴加热等方法助溶;
(2) 一定要按顺序加入溶剂 (助溶剂) 。
Identification of the lead compound XIE18-6 as p18 small molecule inhibitor (or p18SMI).
p18SMI compounds increase HSC proliferation through the p18-CDK4/6 pathway in LT-HSC.Sci Rep.2015 Dec 18;5:18115. th> |
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![]() Medicinal chemistry optimization and modification through SAR studies of lead compound XIE18-6.
Confirmation of p18SMIs promoting expansion of human hematopoietic stem cellsex vivo.Sci Rep.2015 Dec 18;5:18115. td> |
![]() Treatment of c-Kit-enriched murine BM cells with p18SMI compounds enhances HSC expansion.Sci Rep.2015 Dec 18;5:18115. td> |
![]() Cytotoxicity assessment of top p18SMI compounds.Sci Rep.2015 Dec 18;5:18115. th> |
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