L-Eflornithine monohydrochloride
Names
[ CAS No. ]:
69955-42-6
[ Name ]:
L-Eflornithine monohydrochloride
Biological Activity
[Description]:
L-Eflornithine monohydrochloride (L-DFMO monohydrochloride) is an enantiomer of Eflornithine. 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[1].
[Related Catalog]:
[Target]
KD:1.3±0.3 µM (Ornithine decarboxylase, ODC)[1]
[In Vitro]
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. 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[1]. 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[2]. The L-Eflornithine also appears to be more potent in cultured T.brucei gambiense parasites[2].
[In Vivo]
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. The typical oral clearances of L-Eflornithine and D-eflornithine are 17.4 and 8.23 liters/h, respectively[2].
[References]
[Related Small Molecules]
Captisol
|
Cyclosporin A
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H2DCFDA
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0MPTP hydrochloride
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GW4869
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Etomoxir
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TD139
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Mitoquinone mesylate
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GSK2795039
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JC-1
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BAPTA-AM
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AP 20187
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Setanaxib (GKT137831)
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D-Luciferin
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Crotaline
Chemical & Physical Properties
[ Molecular Formula ]:
C6H13ClF2N2O2
[ Molecular Weight ]:
218.63