Inhibitors of interleukin-1beta converting enzyme
a technology of interleukin-1beta and converting enzyme, which is applied in the direction of antibacterial agents, peptide/protein ingredients, dipeptides, etc., can solve the problems of poor oral absorption, poor cellular penetration and cellular activity, and unsatisfactory pharmacologic properties, so as to improve cellular potency, inhibit the activity of the enzyme, and treat or prevent diseases
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example 1
Inhibition of ICE
[1757] We obtained inhibition constants (Ki) and IC50 values for compounds of this invention using the three methods described below:
1. Enzyme Assay with UV-Visible Substrate
[1758] This assay is run using an Succinyl-Tyr-Val-Ala-Asp-pNitroanilide substrate. Synthesis of analogous substrates is described by L. A. Reiter (Int. J. Peptide Protein Res. 43, 87-96 (1994)). The assay mixture contains: [1759] 65 μl buffer (10 mM Tris, 1 mM DTT, 0.1% CHAPS @pH 8.1) [1760] 10 μl ICE (50 nM final concentration to give a rate of ˜1 mOD / min) [1761] 5 μl DMSO / Inhibitor mixture [1762] 20 μl 400 μM Substrate (80 μM final concentration) [1763] 100 μl total reaction volume
[1764] The visible ICE assay is run in a 96-well microtiter plate. Buffer, ICE and DMSO (if inhibitor is present) are added to the wells in the order listed. The components are left to incubate at room temperature for 15 minutes starting at the time that all components are present in all wells. The microtiter p...
example 2
Pharmacokinetic Studies in the Mouse
[1784] Peptidyl ICE inhibitors are cleared rapidly with clearance rates greater than 100 μ / min / kg. Compounds with lower clearance rates have improved pharmacokinetic properties relative to peptidyl ICE inhibitors.
[1785] We obtained the rate of clearance in the mouse (μ / min / kg) for several compounds of this invention using the method described below:
Sample Preparation and Dosing
[1786] Compounds were dissolved in sterile TRIS solution (0.02M or 0.05M) at a concentration of 2.5 mg / ml. Where necessary to ensure a complete solution, the sample was first dissolved in a minimum of dimethylacetamide (maximum of 5% of total solution volume) then diluted with the TRIS solution.
[1787] The drug solution was administered to CD-1 mice (Charles River Laboratories—26-31 g) via the tail vein at a dose volume of 10 ml / kg giving a drug dose of 25 mg / kg.
[1788] Mice were dosed in groups of 5 for each timepoint (generally from 2 minutes to 2 hours) then at the a...
example 3
[1798] Peptidyl ICE inhibitors are cleared rapidly with clearance rates greater than 80 ml / min / kg. Compounds with lower clearance rates have improved pharmacokinetic properties relative to peptidyl ICE inhibitors.
[1799] We obtained the rate of clearance in the rat (ml / min / kg) for several compounds of this invention using the method described below:
[1800] Cannulations of the jugular and carotid vessels of rats under anesthesia were performed one day prior to the pharmacokinetic study. M. J. Free, R. A. Jaffee; ‘Cannulation techniques for the collection blood and other bodily fluids’; in: Animal Models; p. 480-495; N. J. Alexander, Ed.; Academic Press; (1978). Drug (10 mg / mL) was administered via the jugular vein in a vehicle usually consisting of: propylene glycol / saline, containing 100 mM sodium bicarbonate in a 1:1 ratio. Animals were dosed with 10-20 mg drug / kg and blood samples were drawn at 0, 2, 5, 7, 10, 15, 20, 30, 60, and 90 minutes from an indw...
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