Poseltinib
(Synonyms: HM71224; LY3337641) 目录号 : GC60298
Poseltinib (HM71224, LY3337641) shows a highly selective inhibition for Bruton’s tyrosine kinase (BTK) with IC50 of 1.95 nM, in which the selectivity toward other BMX, TEC and TXK are 0.3, 2.3 and 2.4 fold, respectively.
Cas No.:1353552-97-2
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
- View current batch:
- Purity: >98.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Poseltinib (HM71224, LY3337641) shows a highly selective inhibition for Bruton’s tyrosine kinase (BTK) with IC50 of 1.95 nM, in which the selectivity toward other BMX, TEC and TXK are 0.3, 2.3 and 2.4 fold, respectively.
[1] Kim YY, et al. Arthritis Res Ther. 2017 Sep 26;19(1):211.
| Cas No. | 1353552-97-2 | SDF | |
| 别名 | HM71224; LY3337641 | ||
| Canonical SMILES | O=C(C=C)NC1=CC=CC(OC2=C(OC=C3)C3=NC(NC4=CC=C(N5CCN(C)CC5)C=C4)=N2)=C1 | ||
| 分子式 | C26H26N6O3 | 分子量 | 470.52 |
| 溶解度 | DMSO : 100 mg/mL (212.53 mM; Need ultrasonic) | 储存条件 | |
| General tips | 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 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。 为了提高溶解度，请将管子加热至37℃，然后在超声波浴中震荡一段时间。 |
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| Shipping Condition | 评估样品解决方案：配备蓝冰进行发货。所有其他可用尺寸：配备RT，或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 2.1253 mL | 10.6265 mL | 21.2531 mL |
| 5 mM | 0.4251 mL | 2.1253 mL | 4.2506 mL |
| 10 mM | 0.2125 mL | 1.0627 mL | 2.1253 mL |
| 第一步：请输入基本实验信息（考虑到实验过程中的损耗，建议多配一只动物的药量） | ||||||||||
| 给药剂量 | mg/kg |  |
动物平均体重 | g | |
每只动物给药体积 | ul | |
动物数量 | 只 |
| 第二步：请输入动物体内配方组成（配方适用于不溶于水的药物；不同批次药物配方比例不同，请联系GLPBIO为您提供正确的澄清溶液配方） | ||||||||||
| % DMSO % % Tween 80 % saline | ||||||||||
| 计算重置 | ||||||||||
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，
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 saline，混匀澄清。
1. 首先保证母液是澄清的；
2.
一定要按照顺序依次将溶剂加入，进行下一步操作之前必须保证上一步操作得到的是澄清的溶液，可采用涡旋、超声或水浴加热等物理方法助溶。
3. 以上所有助溶剂都可在 GlpBio 网站选购。
Safety and Efficacy of Poseltinib, Bruton's Tyrosine Kinase Inhibitor, in Patients With Rheumatoid Arthritis: A Randomized, Double-blind, Placebo-controlled, 2-part Phase II Study
J Rheumatol 2021 Jul;48(7):969-976.PMID:33323529DOI:10.3899/jrheum.200893.
Objective: To evaluate the efficacy and safety of Poseltinib (formerly LY3337641/HM71224), an irreversible covalent inhibitor of Bruton's tyrosine kinase in a 2-part, phase II trial (RAjuvenate; ClinicalTrials.gov: NCT02628028) in adults with active rheumatoid arthritis (RA). Methods: In Part A, 36 patients with mildly active RA were randomized 1:1:1:1 to oral Poseltinib 5, 10, or 30 mg or placebo once daily for 4 weeks to assess safety and tolerability. No safety signals precluded moving to Part B, where 250 patients with moderate-to-severe RA were randomized 1:1:1:1 to oral Poseltinib 5 mg (n = 63), 10 mg (n = 62), or 30 mg (n = 63), or placebo (n = 62) once daily for 12 weeks. Parts A and B permitted stable doses of background disease-modifying antirheumatic drugs. The primary endpoint in Part B was proportion of patients achieving 20% improvement in American College of Rheumatology criteria (ACR20) at Week 12. Logistic regression compared each Poseltinib dose to placebo for primary and secondary endpoints. Nonresponder imputation was used for missing data. Results: After interim analysis showed low likelihood of demonstrating significant efficacy, the sponsor discontinued Part B of the study. One hundred and eighty-nine (76%) patients completed 12 weeks in Part B; 61 discontinued study treatment (27 [44%] due to study termination by sponsor). There was no statistically significant difference in ACR20 response between any dose of Poseltinib and placebo at Week 12 (P > 0.05 for all comparisons). Five serious adverse events occurred (n = 2, placebo; n = 3, 30 mg); there was 1 death due to a fall. Conclusion: While no safety findings precluded continuation, the study was terminated after interim data demonstrated low likelihood of benefit in RA.
Target modulation and pharmacokinetics/pharmacodynamics translation of the BTK inhibitor Poseltinib for model-informed phase II dose selection
Sci Rep 2021 Sep 21;11(1):18671.PMID:34548595DOI:10.1038/s41598-021-98255-7.
The selective Bruton tyrosine kinase (BTK) inhibitor Poseltinib has been shown to inhibit the BCR signal transduction pathway and cytokine production in B cells (Park et al. Arthritis Res. Ther. 18, 91, https://doi.org/10.1186/s13075-016-0988-z , 2016). This study describes the translation of nonclinical research studies to a phase I clinical trial in healthy volunteers in which pharmacokinetics (PKs) and pharmacodynamics (PDs) were evaluated for dose determination. The BTK protein kinase inhibitory effects of Poseltinib in human peripheral blood mononuclear cells (PBMCs) and in rats with collagen-induced arthritis (CIA) were evaluated. High-dimensional phosphorylation analysis was conducted on human immune cells such as B cells, CD8 + memory cells, CD4 + memory cells, NK cells, neutrophils, and monocytes, to map the impact of Poseltinib on BTK/PLC and AKT signaling pathways. PK and PD profiles were evaluated in a first-in-human study in healthy donors, and a PK/PD model was established based on BTK occupancy. Poseltinib bound to the BTK protein and modulated BTK phosphorylation in human PBMCs. High-dimensional phosphorylation analysis of 94 nodes showed that Poseltinib had the highest impact on anti-IgM + CD40L stimulated B cells, however, lower impacts on anti-CD3/CD-28 stimulated T cells, IL-2 stimulated CD4 + T cells and NK cells, M-CSF stimulated monocytes, or LPS-induced granulocytes. In anti-IgM + CD40L stimulated B cells, Poseltinib inhibited the phosphorylation of BTK, AKT, and PLCγ2. Moreover, Poseltinib dose dependently improved arthritis disease severity in CIA rat model. In a clinical phase I trial for healthy volunteers, Poseltinib exhibited dose-dependent and persistent BTK occupancy in PBMCs of all poseltinib-administrated patients in the study. More than 80% of BTK occupancy at 40 mg dosing was maintained for up to 48 h after the first dose. A first-in-human healthy volunteer study of Poseltinib established target engagement with circulating BTK protein. Desirable PK and PD properties were observed, and a modeling approach was used for rational dose selection for subsequent trials. Poseltinib was confirmed as a potential BTK inhibitor for the treatment of autoimmune diseases.Trial registration: This article includes the results of a clinical intervention on human participants [NCT01765478].
Discovery of a potent BTK and IKZF1/3 triple degrader through reversible covalent BTK PROTAC development
Curr Res Chem Biol 2022;2:100029.PMID:36712232DOI:10.1016/j.crchbi.2022.100029.
Building on our previous work on ibrutinib-based reversible covalent Bruton's tyrosine kinase (BTK) PROTACs, we explored a different irreversible BTK inhibitor Poseltinib as the BTK binder for PROTAC development. Different from ibrutinib, converting the irreversible cysteine reacting acrylamide group of Poseltinib to a reversible covalent cyano-acrylamide group dramatically decreases the binding affinity to BTK by over 700 folds. Interestingly, one of the reversible covalent BTK PROTACs based on Poseltinib with a rigid linker, dubbed as PS-RC-1, is highly potent (IC50 = ~10 nM) in Mino cells but not in other mantle cell lymphoma (MCL) cell lines, such as Jeko-1 and Rec-R cells. We showed that PS-RC-1 potently induces degradation of IKZF1 and IKZF3 but not BTK or GSPT1, accounting for its toxicity in Mino cells. We further decreased the molecular size of PS-RC-1 by shrinking the BTK binding moiety and developed PS-2 as a potent BTK and IKZF1/3 triple degrader with high specificity.