Powder: -20°C for 3 years | In solvent: -80°C for 1 year
L-Eflornithine is an irreversible ornithine decarboxylase (ODC) inhibitor with a KD of 1.3±0.3 μM, and a Kinact of 0.15±0.03 min-1. L-Eflornithine monohydrochloride (L-DFMO monohydrochloride) is an enantiomer of Eflornithine.
Description | L-Eflornithine is an irreversible ornithine decarboxylase (ODC) inhibitor with a KD of 1.3±0.3 μM, and a Kinact of 0.15±0.03 min-1. L-Eflornithine monohydrochloride (L-DFMO monohydrochloride) is an enantiomer of Eflornithine. |
Targets&IC50 | Ornithine decarboxylase,ODC:(kd)1.3±0.3 µM |
In vitro | Treatment of human colon tumour-derived HCT116 cells with either L-Eflornithine or D- Eflornithine decreases the cellular polyamine contents in a concentration-dependent manner. The enantiomers display different potencies in vitro, with the L-enantiomer having up to a 20-fold higher affinity for the target enzyme ornithine decarboxylase. ?The L-Eflornithine also appears to be more potent in cultured T.brucei gambiense parasites.Eflornithine (D/L-DFMO) is an inhibitor of ODC, the first enzyme in eukaryotic polyamine biosynthesis.?Both enantiomers of Eflornithine (DFMO) irreversibly inactivate ODC.?Both Eflornithine enantiomers (L-Eflornithine and D-Eflornithine) suppress ODC activity in a time- and concentration-dependent manner.?The inhibitor dissociation constant (KD) values for the formation of enzyme-inhibitor complexes are 28.3±3.4, 1.3±0.3 and 2.2±0.4 μM respectively for D-Eflornithine, L-Eflornithine and Eflornithine.?The inhibitor inactivation constants (Kinact) for the irreversible step were 0.25±0.03, 0.15±0.03 and 0.15±0.03 min-1 respectively for D-Eflornithine, L-Eflornithine and Eflornithine. |
In vivo | The typical oral clearances of L-Eflornithine and D-eflornithine are 17.4 and 8.23 liters/h, respectively.The more potent L-Eflornithine is present at much lower concentrations in both plasma and cerebrospinal fluid (CSF) than those of the D-Eflornithine.?The plasma concentrations of L-Eflornithine are on average 52% of the D-enantiomer concentrations. |
Synonyms | L-α-difluoromethylornithine monohydrochloride, L-RMI71782 monohydrochloride, L-DFMO monohydrochloride |
Molecular Weight | 218.63 |
Formula | C6H13ClF2N2O2 |
CAS No. | 69955-42-6 |
Powder: -20°C for 3 years | In solvent: -80°C for 1 year
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L-Eflornithine monohydrochloride 69955-42-6 Others L-a-difluoromethylornithine Monohydrochloride L-Eflornithine L-RMI-71782 L-RMI71782 Monohydrochloride L-RMI 71782 L-α-difluoromethylornithine monohydrochloride L-RMI-71782 Monohydrochloride L-a-difluoromethylornithine LEflornithine monohydrochloride L-RMI71782 monohydrochloride L-DFMO Monohydrochloride L-RMI71782 L-α-difluoromethylornithine Monohydrochloride L-Eflornithine Monohydrochloride L-RMI 71782 Monohydrochloride L-DFMO monohydrochloride L Eflornithine monohydrochloride L-alpha-difluoromethylornithine Monohydrochloride L-α-difluoromethylornithine L-alpha-difluoromethylornithine L-DFMO inhibitor inhibit