Domatinostat
(Synonyms: (2E)-N-(2-氨基苯基)-3-[1-[[4-(1-甲基-1H-吡唑-4-基)苯基]磺酰基]-1H-吡咯-3-基]-2-丙烯酰胺,4SC-202 free base) 目录号 : GC35893
Domatinostat (4SC-202) is a selective class I HDAC inhibitor with IC50 of 1.20 μM, 1.12 μM, and 0.57 μM for HDAC1, HDAC2, and HDAC3, respectively. Also displays inhibitory activity against Lysine specific demethylase 1 (LSD1). Phase 1.
Cas No.:910462-43-0
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
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- SDS (Safety Data Sheet)
- Datasheet
Domatinostat (4SC-202) is a selective class I HDAC inhibitor with IC50 of 1.20 μM, 1.12 μM, and 0.57 μM for HDAC1, HDAC2, and HDAC3, respectively. Also displays inhibitory activity against Lysine specific demethylase 1 (LSD1). Phase 1.
In HeLa cells, 4SC-202 induces hyperacetylation of histone H3 with EC50 of 1.1 μM. 4SC-202 induces a G2/M cell cycle arrest by interfering with the normal development of the mitotic spindle and causing collapsed spindle apparatus and multiple nucleation centres. In addition, 4SC-202 shows a broad anti-proliferative activity towards human cancer cell lines with a mean IC50 of 0.7 μM. [1]
In vivo, 4SC-202 has a high oral bioavailability, and shows high metabolic stability and a low plasma clearance. 4SC-202 (120 mg/kg p.o.) shows pronounced and robust anti-tumor activity in both A549 NSCLC xenograft and RKO27 colon carcinoma model. [1]
[1] Henning SW, et al. 22nd EORTC-NCI-AACR symposium. 2010. Abstract # 178. [2] Zhijun H, et al. Tumour Biol. 2016, 37(8):10257-67.
| Cas No. | 910462-43-0 | SDF | |
| 别名 | (2E)-N-(2-氨基苯基)-3-[1-[[4-(1-甲基-1H-吡唑-4-基)苯基]磺酰基]-1H-吡咯-3-基]-2-丙烯酰胺,4SC-202 free base | ||
| Canonical SMILES | O=C(NC1=CC=CC=C1N)/C=C/C2=CN(S(=O)(C3=CC=C(C4=CN(C)N=C4)C=C3)=O)C=C2 | ||
| 分子式 | C23H21N5O3S | 分子量 | 447.51 |
| 溶解度 | DMSO: ≥ 58 mg/mL (129.61 mM) | 储存条件 | Store at -20°C |
| 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 | 2.2346 mL | 11.1729 mL | 22.3459 mL |
| 5 mM | 0.4469 mL | 2.2346 mL | 4.4692 mL |
| 10 mM | 0.2235 mL | 1.1173 mL | 2.2346 mL |
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| 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 |
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| % DMSO % % Tween 80 % saline | ||||||||||
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2.
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HDAC class I inhibitor Domatinostat sensitizes pancreatic cancer to chemotherapy by targeting cancer stem cell compartment via FOXM1 modulation
J Exp Clin Cancer Res 2022 Mar 3;41(1):83.PMID:35241126DOI:10.1186/s13046-022-02295-4.
Background: Pancreatic ductal adenocarcinoma (PDAC) represents an unmet clinical need due to the very poor prognosis and the lack of effective therapy. Here we investigated the potential of Domatinostat (4SC-202), a new class I histone deacetylase (HDAC) inhibitor, currently in clinical development, to sensitize PDAC to first line standard gemcitabine (G)/taxol (T) doublet chemotherapy treatment. Methods: Synergistic anti-tumor effect of the combined treatment was assessed in PANC1, ASPC1 and PANC28 PDAC cell lines in vitro as well as on tumor spheroids and microtissues, by evaluating combination index (CI), apoptosis, clonogenic capability. The data were confirmed in vivo xenograft models of PANC28 and PANC1 cells in athymic mice. Cancer stem cells (CSC) targeting was studied by mRNA and protein expression of CSC markers, by limiting dilution assay, and by flow cytometric and immunofluorescent evaluation of CSC mitochondrial and cellular oxidative stress. Mechanistic role of forkhead box M1 (FOXM1) and downstream targets was evaluated in FOXM1-overexpressing PDAC cells. Results: We showed that Domatinostat sensitized in vitro and in vivo models of PDAC to chemotherapeutics commonly used in PDAC patients management and particularly to GT doublet, by targeting CSC compartment through the induction of mitochondrial and cellular oxidative stress. Mechanistically, we showed that Domatinostat hampers the expression and function of FOXM1, a transcription factor playing a crucial role in stemness, oxidative stress modulation and DNA repair. Domatinostat reduced FOXM1 protein levels by downregulating mRNA expression and inducing proteasome-mediated protein degradation thus preventing nuclear translocation correlated with a reduction of FOXM1 target genes. Furthermore, by overexpressing FOXM1 in PDAC cells we significantly reduced domatinostat-inducing oxidative mitochondrial and cellular stress and abolished GT sensitization, both in adherent and spheroid cells, confirming FOXM1 crucial role in the mechanisms described. Finally, we found a correlation of FOXM1 expression with poor progression free survival in PDAC chemotherapy-treated patients. Conclusions: Overall, we suggest a novel therapeutic strategy based on Domatinostat to improve efficacy and to overcome resistance of commonly used chemotherapeutics in PDAC that warrant further clinical evaluation.
Domatinostat favors the immunotherapy response by modulating the tumor immune microenvironment (TIME)
J Immunother Cancer 2019 Nov 8;7(1):294.PMID:31703604DOI:10.1186/s40425-019-0745-3.
Background: The efficacy of PD-(L)1 blockade depends on the composition of the tumor immune microenvironment (TIME) and is generally higher in tumors with pre-existing cytotoxic T cells (CTL) than in those with low CTL numbers. Nonetheless, a significant proportion of patients with pre-existing immunity fail to respond, indicating a therapeutic potential for combining PD-(L)1 blockade with additional immunomodulatory agents in both CTL-high and -low immune phenotypes. Here, we evaluated Domatinostat (4SC-202), a class I-selective histone deacetylase (HDAC) inhibitor, for its effect on the TIME and its antitumoral efficacy using syngeneic mouse models with CTL-high or CTL-low tumors. Methods: Domatinostat was evaluated in PD-1 blockade-insensitive CTL-low (CT26) and CTL-high (C38) syngeneic models alone and in combination with different immune-inhibitory and -stimulatory approaches. Effects on the immunophenotype were assessed via flow cytometry and RNA-seq analyses. The changes in RNA-seq-based immune signatures determined in a murine setting were investigated in patient samples from the first-dose cohort of the SENSITIZE trial (NCT03278665) evaluating Domatinostat combined with pembrolizumab in advanced-stage melanoma patients refractory/nonresponding to PD-1 blockade. Results: Domatinostat increased the expression of antigen-presenting machinery (APM) genes and MHC class I and II molecules, along with CTL infiltration, in tumors of both immune phenotypes. In combination with PD-(L)1 blockade, Domatinostat augmented antitumor effects substantially above the effects of single-agent therapies, displaying greater benefit in tumors with pre-existing CTLs. In this setting, the combination of Domatinostat with agonistic anti-4-1BB or both PD-1 and LAG3 blockade further increased the antitumor efficacy. In CTL-low tumors, Domatinostat enhanced the expression of genes known to reinforce immune responses against tumors. Specifically, Domatinostat increased the expression of Ifng and genes associated with responses to pembrolizumab and nivolumab. Clinically, these findings were confirmed in patients with advanced melanoma treated with Domatinostat for 14 days, who demonstrated elevated expression of APM and MHC genes, the IFNG gene, and the IFN-γ and pembrolizumab response signatures in individual tumor samples. Conclusion: In summary, these data suggest a promising potential of Domatinostat in combination with immunotherapy to improve the outcome of refractory cancer patients.
HDAC Class I Inhibitor Domatinostat Preferentially Targets Glioma Stem Cells over Their Differentiated Progeny
Int J Mol Sci 2022 Jul 22;23(15):8084.PMID:35897656DOI:10.3390/ijms23158084.
Cancer stem cells (CSCs) are in general characterized by higher resistance to cell death and cancer therapies than non-stem differentiated cancer cells. However, we and others have recently revealed using glioma stem cells (GSCs) as a model that, unexpectedly, CSCs have specific vulnerabilities that make them more sensitive to certain drugs compared with their differentiated counterparts. We aimed in this study to discover novel drugs targeting such Achilles' heels of GSCs as anti-GSC drug candidates to be used for the treatment of glioblastoma, the most therapy-resistant form of brain tumors. Here we report that Domatinostat (4SC-202), a class I HDAC inhibitor, is one such candidate. At concentrations where it showed no or minimal growth inhibitory effect on differentiated GSCs and normal cells, Domatinostat effectively inhibited the growth of GSCs mainly by inducing apoptosis. Furthermore, GSCs that survived Domatinostat treatment lost their self-renewal capacity. These results suggested that Domatinostat is a unique drug that selectively eliminates GSCs not only physically by inducing cell death but also functionally by inhibiting their self-renewal. Our findings also imply that class I HDACs and/or LSD1, another target of Domatinostat, may possibly have a specific role in the maintenance of GSCs and therefore could be an attractive target in the development of anti-GSC therapies.
The HDAC Inhibitor Domatinostat Promotes Cell-Cycle Arrest, Induces Apoptosis, and Increases Immunogenicity of Merkel Cell Carcinoma Cells
J Invest Dermatol 2021 Apr;141(4):903-912.e4.PMID:33002502DOI:10.1016/j.jid.2020.08.023.
Merkel cell carcinoma (MCC) is a rare, highly aggressive skin cancer for which immune modulation by immune checkpoint inhibitors shows remarkable response rates. However, primary or secondary resistance to immunotherapy prevents benefits in a significant proportion of patients. For MCC, one immune escape mechanism is insufficient for recognition by T cells owing to the downregulation of major histocompatibility complex I surface expression. Histone deacetylase inhibitors have been demonstrated to epigenetically reverse the low major histocompatibility complex I expression caused by the downregulation of the antigen-processing machinery. Domatinostat, an orally available small-molecule inhibitor targeting histone deacetylase class I, is currently in clinical evaluation to overcome resistance to immunotherapy. In this study, we present preclinical data on Domatinostat's efficacy and mode of action in MCC. Single-cell RNA sequencing revealed a distinct gene expression signature of antigen processing and presentation, cell-cycle arrest, and execution phase of apoptosis on treatment. Accordingly, functional assays showed that Domatinostat induced G2M arrest and apoptosis. In the surviving cells, antigen-processing machinery component gene transcription and translation were upregulated, consequently resulting in increased major histocompatibility complex I surface expression. Altogether, Domatinostat not only exerts direct antitumoral effects but also restores HLA class I surface expression on MCC cells, therefore, restoring surviving MCC cells' susceptibility to recognition and elimination by cognate cytotoxic T cells.
Phase I study of Domatinostat (4SC-202), a class I histone deacetylase inhibitor in patients with advanced hematological malignancies
Eur J Haematol 2019 Feb;102(2):163-173.PMID:30347469DOI:10.1111/ejh.13188.
Objectives: Domatinostat (4SC-202) is a selective class I histone deacetylase inhibitor (HDACi). This phase I study investigated safety, tolerability, pharmacokinetics (PK), pharmacodynamics, and antitumor activity in patients with advanced hematological malignancies. Methods: Domatinostat was administered orally once (QD) or twice daily (BID) on days 1-14 with 7 days off or continuously days 1-21 in a 3 + 3 design at 7 dose levels from 25 to 400 mg total daily dose (TDD). Twenty-four patients were treated with Domatinostat. Results: No formal maximum tolerated dose (MTD) was determined. One dose-limiting toxicity (DLT, grade 4 hypercalcemia) occurred during 200 mg BID continuous treatment. Six patients were reported with ≥ grade 3 treatment-related adverse events (TRAE; grade 3 hematological in three patients, grade 3 and grade 4 liver enzyme increase in 2 patients, grade 4 pulmonary embolism, and grade 4 hypercalcemia in one patient each). Higher grade hepatic TRAE occurred in the 200 mg BID continuous treatment cohort. Out of 24 patients, 1 achieved a complete response, 1 achieved a partial response, and 18 had stable disease as best response. Conclusion: Administration of Domatinostat was safe, well tolerated with signs of antitumor activity. Four hundred milligram TDD in a 200 mg BID schedule (14 + 7) is the recommended phase II dose for monotherapy.