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| 活性类型 | 活性值-log(M) | 作用机制 | 期刊 | 参考文献(PubMed IDs) |
|---|
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Seletalisib (UCB-5857)是新型的PI3Kδ小分子抑制剂,IC50为12 nM。它对PI3K具有显著的选择性,相对其他I型PI3K亚型,Seletalisib对PI3Kδ的选择性高24-303倍。
Information
Seletalisib (UCB-5857) is a novel small-molecule inhibitor ofPI3Kδwith an IC50 value of 12 nM and shows significant selectivity to PI3Kδ with respect to the other class I PI3K isoforms (between 24- and 303-fold).
Targets
PI3Kδ (Cell-free assay); PI3Kγ (Cell-free assay) 12 nM; 282 nM
In vitro
Seletalisib is a potent, ATP-competitive, and selective PI3Kδ inhibitor able to block protein kinase B (AKT) phosphorylation following activation of the B-cell receptor in a B-cell line. Moreover, seletalisib inhibited N-formyl peptide-stimulated but not phorbol myristate acetate–stimulated superoxide release from human neutrophils, consistent with a PI3Kδ-specific activity. Findings from cellular assays of adaptive immunity demonstrated that seletalisib blocks human T-cell production of several cytokines from activated T-cells. Additionally, seletalisib inhibited B-cell proliferation and cytokine release. In human whole blood assays, seletalisib inhibited CD69 expression upon B-cell activation and anti-IgE-mediated basophil degranulation. From 239 kinases screened, seletalisib at a concentration of 10 μM showed no inhibitory activity greater than 47% (MAP4K4) against non-PI3K kinase enzymes. Against nonkinase enzymes, seletalisib showed weak activities against phosphodiesterase (PDE)3A, PDE2A1, and PDE4D2, with inhibition varying between 32 and 74% at 10 μM. When screened at a concentration of 10 μM against 55 receptors and ion channels, the highest inhibitory activity of seletalisib observed was 20%. One receptor, neuropeptide Y receptor (Y1) showed 54% activation. In vitro receptor binding and enzyme assays across a broad range of target classes showed that seletalisib is selective for PI3Kδ. Seletalisib potently inhibited the phosphorylation of AKT following anti-IgM stimulation of the BCR on Ramos cells with an IC50 of 15 nM. When profiled in a wide range of primary cell assay systems, including fibroblasts, epithelial, endothelial and vascular smooth muscle cells, seletalisib showed significant activity only in those systems containing lymphocytes, demonstrating its functional selectivity towards PI3Kδ-expressing cells.
In vivo
Seletalisib shows dose-dependent inhibition in an in vivo rat model of anti-CD3-antibody-induced interleukin 2 release. Analysis of the relationship between inhibition of IL-2 release and seletalisib blood concentration, using combined data across experiments, demonstrated that seletalisib has potent in vivo effects with an estimated IC50 value of <10 nM. In first-in-man studies, mean seletalisib plasma concentration-time profiles increased with increasing dose after single and multiple dosing, with no major deviations from dose proportionality. There was no unexpected accumulation or loss of exposure after multiple dosing (time-independent pharmacokinetic (PK) profile) and apparent t1/2 values (approx. 20h) were supportive of once-daily dosing.
Cell Research(from reference)
Cell lines:Ramos B-cell line
Concentrations:0.1 nM-10 μM
Incubation Time:10 min
分类树(Taxonomy Tree)
| 界(kingdom) | 有机化合物 |
|---|---|
| 超类(Superclass) | 有机杂环化合物 |
| 类(Class) | 吡啶及其衍生物 |
| 亚类(Subclass) | 联吡啶和寡吡啶 |
| 中间层级节点(Intermediate Tree Nodes) | 暂无 |
| 直接上位类(Direct Parent) | 联吡啶和寡吡啶 |
| 其他上位类(Alternative Parents) | 氯喹啉类 吡啶并嘧啶 仲烷基芳胺 氨基嘧啶及其衍生物 吡啶衍生物 芳基氯化物 苯类化合物 咪唑内酰胺类 杂芳族化合物 氮杂环化合物 碳氢化合物衍生物 有机氟化物 烷基氟化物 有机氧化物 有机盐 有机氯化物 有机阳离子 |
| 分子骨架(Molecular Framework) | 芳香族杂多环化合物 |
| 取代基(Substituents) | 氟化烷基 - 烷基溴化物 - 氨基酸 - 氨基吡啶 - 芳香族杂多环化合物 - 芳基氯化物 - 芳基卤化物 - 氮杂环 - 苯基化合物 - 联吡啶 - 氯喹啉 - 卤喹啉 - 杂芳香族化合物 - 烃衍生物 - 咪唑内酰胺 - 有机铵盐 - 有机硝基化合物 - 有机氧化物 - 有机氧化合物 - 有机盐 - 有机氯化物 - 有机氟化物 - 有机卤化物 - 有机氮化合物 - 吡啶鎓 - 吡啶吡啶 - 嘧啶 - 喹啉胺 - 二级脂肪族/芳香族胺 - 醛基 |
| 描述(Description) | 该化合物属于双吡啶类和寡吡啶类有机化合物。这类化合物含有两个相互连接的吡啶环。 |
| 外部描述符(External Descriptors) | 暂无 |
| IC50 | PI3Kδ, IC50: 12 nM |
|---|---|
| ALogP | 4.436 |
| HBD Count | 1 |
| Rotatable Bond | 5 |
| 作用机制 | Action Type | target ID | Target Name | Target Type | Target Organism | Binding Site Name | 参考文献 |
|---|
H302: 吞食有害
H315: 引起皮肤刺激
H319: 引起严重眼睛刺激
H335: 可能引起呼吸道刺激
P261: 避免吸入灰尘/烟雾/气体/雾/蒸汽/喷雾
P280: 戴防护手套/穿防护服/戴防护眼罩/戴防护面具。
P301+P312: 如误吞咽:如感觉不适,呼叫急救中心/医生。
P302+P352: 如皮肤沾染:用水充分清洗。
P305+P351+P338: 如进入眼睛:用水小心冲洗几分钟。如戴隐形眼镜并可方便地取出,取出隐形眼镜。继续冲洗。