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In vitro: EDOS101 inhibits HDAC activity in rat peripheral blood mononuclear cells (PBMCs) in a cellular assay by approximately 90% one hour after dosing with 10mg/kg i.v. HDAC inhibition in PBMCs could not be increased with higher doses up to 50mg/kg. EDO-S101 triggers apoptosis and shows strong antitumor activity in HL60 and Daudi cells. Initial in vitro experiments in HL60 cells shows an activation of the intrinsic pathway of apoptosis with cleavage of caspases 3, 9 and PARP and a marked reduction of anti-apoptotic proteins XIAP and Mcl-1. In vivo: Intracellular HDAC inhibition of EDO-S101, which occurs rapidly after dosing is at maximum activity already at the lowest dose of 10mg/kg and lasts for about 12-16 hours. Exposure to EDO-S101 causes a strong DNA repair response evidenced by activation of pH2AX and p53 in tumors taken from mice bearing subcutaneous human Burkitt’s lymphoma. Tumors of BL rapidly shrink or are completely eradicated after i.v. administration of EDO-S101.
| Cell Experiment | |
|---|---|
| Cell lines | human MM cell lines |
| Preparation method | MM1S cells were incubated for 48 h with increasing doses of EDO-S101, together with IL-6 at 1 nM or IGF-1 at 10 nM, and proliferation of MM cells was assessed by MTT assay. |
| Concentrations | |
| Incubation time | 48 h |
| Animal Experiment | |
|---|---|
| Animal models | Mice |
| Formulation | |
| Dosages | 60 mg/kg |
| Administration | i.v. |
| Molecular Weight | 415.36 |
| Formula | C19H28Cl2N4O2 |
| CAS Number | 1236199-60-2 |
| Solubility (25°C) | 30 mg/mL in DMSO |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
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| Givinostat hydrochloride monohydrate
ITF2357 (Givinostat, Gavinostat) is a histone deacetylase inhibitor. The IC50 values for maize HDAC preparations HD2, HD-1B and HD-1A are 10, 7.5 and 16 nM respectively. |
| Niltubacin
Niltubacin, as an inactive derivative of Tubacin, is a highly potent and selective, reversible cell-permeable inhibitor of HDAC6. |
| Tubacin
Tubacin (Tubulin Acetylation Inducer) is a highly potent and selective, reversible cell-permeable inhibitor of HDAC6 with IC50 of 0.004µM. |
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