Bile Acid Recycling Inhibitors for Treatment of Pediatric Cholestatic Liver Diseases

a cholestatic liver disease and bile acid recycling technology, which is applied in the direction of drug compositions, extracellular fluid disorders, metabolic disorders, etc., can solve the problems of inability to meet the needs of pediatric patients, inability to provide suitable pediatric patients, and high healthcare costs, so as to reduce the necrosis and/or damage of intestinal walls, reduce the intraenterocyte bile acid/salt, and inhibit the recycling of bile acid salts

Inactive Publication Date: 2013-05-02
LUMENA PHARMA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]In certain embodiments, methods provided herein comprise administering compounds that inhibit the ASBT or any recuperative bile salt transporter. In certain embodiments, use of the compounds provided herein reduces or inhibits recycling of bile acid salts in the gastrointestinal tract. In some embodiments, the methods provided herein reduce intraenterocyte bile acids/salts or reduce necrosis and/or damage to intestinal or hepatocellular architecture.
[0014]In certain embodiments, the methods described herein treat or ameliorate a pediatric cholestatic liver disease by increasing intraluminal concentrations of bile acids/salts, which are then excreted in the feces, thereby reducing overall bile acid and serum bile acid or hepatic bile acid load in an individual in need thereof. In certain embodiments, increasing intraluminal bile acid concentrations according to methods described herein provide protection and/or control of the integrity of an individual's liver and/or intestine that has been injured by cholest

Problems solved by technology

Pediatric cholestatic liver diseases affect a small percentage of children, but therapy results in significant healthcare costs each year.
Currently, many of the pediatric cholestatic liver diseases require invasive and costly treatments such as liver transplantation and surgery.
An effective and less invasive treatment that is suitable for the pediatric population is not available.
For example, oral administration of a solid dosage form of medication is p

Method used

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  • Bile Acid Recycling Inhibitors for Treatment of Pediatric Cholestatic Liver Diseases
  • Bile Acid Recycling Inhibitors for Treatment of Pediatric Cholestatic Liver Diseases
  • Bile Acid Recycling Inhibitors for Treatment of Pediatric Cholestatic Liver Diseases

Examples

Experimental program
Comparison scheme
Effect test

example 1

Synthesis of 1-phenethyl-1-((1,4-diazabicyclo[2.2.2]octanyl)pentyl)imidodicarbonimidic diamide, iodide salt

[0673]

Step 1: Synthesis of 5-(1,4-diazabicyclo[2.2.2]octanyl)-1-iodo pentane, iodide salt

[0674]

[0675]1,4-diazabicyclo[2.2.2]octane is suspended in THF. Diiodopentane is added dropwise and the mixture is refluxed overnight. The reaction mixture is filtered.

Step 2: Synthesis of N-phenethyl-5-(1,4-diazabicyclo[2.2.2]octanyl)-1-iodo pentane, iodide salt

[0676]

[0677]5-(1,4-diazabicyclo[2.2.2]octanyl)-1-iodo pentane, iodide salt is suspended in acetonitrile. Phenethylamine is added dropwise and the mixture is refluxed overnight. The reaction mixture is filtered.

Step 3: Synthesis of 1-phenethyl-1-((1,4-diazabicyclo[2.2.2]octanyl)pentyl)imidodicarbonimidic diamide, iodide salt

[0678]N-phenethyl-5-(1,4-diazabicyclo[2.2.2]octanyl)-1-iodo pentane, iodide salt is heated with dicyanodiamide in n-butanol for 4 h. The reaction mixture is concentrated under reduced pressure.

[0679]The compounds i...

example 2

In Vitro Assay for Inhibition of ASBT-Mediated Bile Acid Uptake

[0680]Baby hamster kidney (BHK) cells are transfected with cDNA of human ASBT. The cells are seeded in 96-well tissue culture plates at 60,000 cells / well. Assays are run within 24 hours of seeding.

[0681]On the day of the assay the cell monolayer is washed with 100 mL of assay buffer. The test compound is added to each well along with 6 mM [14C] taurocholate in assay buffer (final concentration of 3 mM [14C] taurocholate in each well). The cell cultures are incubated for 2 h at 37° C. The wells are washed with PBS. Scintillation counting fluid is added to each well, the cells are shaken for 30 minutes prior to measuring amount of radioactivity in each well. A test compound that has significant ASBT inhibitory activity provides an assay wherein low levels of radioactivity are observed in the cells.

example 3

In Vitro Assay for Secretion of GLP-2

[0682]Human NCI-H716 cells are used as a model for L-cells. Two days before each assay experiment, cells are seeded in 12-well culture plates coated with Matrigel® to induce cell adhesion. On the day of the assay, cells are washed with buffer. The cells are incubated for 2 hours with medium alone, or with test compound. The extracellular medium is assayed for the presence of GLP-2. Peptides in the medium are collected by reverse phase adsorption and the extracts are stored until assay. The presence of GLP-2 is assayed using ELISA. The detection of increased levels of GLP-2 in a well containing a test compound identifies the test compound as a compound that can enhance GLP-2 secretions from L-cells.

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Abstract

Provided herein are methods of treating or ameliorating a pediatric cholestatic liver disease by non-systemically administering to an individual in need thereof a therapeutically effective amount of a pediatric formulation comprising an Apical Sodium-dependent Bile Acid Transporter Inhibitor (ASBTI) or a pharmaceutically acceptable salt thereof. Also provided are methods for treating or ameliorating a pediatric liver disease, decreasing the levels of serum bile acids or hepatic bile acids, treating or ameliorating pruritis, reducing liver enzymes, or reducing bilirubin comprising non-systemically administering to an individual in need thereof a therapeutically effective amount of a pediatric formulation comprising an ASBTI or a pharmaceutically acceptable salt thereof.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit under 35 U.S.C. §119(e) of U.S. Provisional Application No. 61 / 553,094, filed Oct. 28, 2011, U.S. Provisional Application No. 61 / 607,487, filed Mar. 6, 2012, U.S. Provisional Application No. 61 / 607,503, filed Mar. 6, 2012, which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION[0002]Pediatric cholestatic liver diseases affect a small percentage of children, but therapy results in significant healthcare costs each year. Currently, many of the pediatric cholestatic liver diseases require invasive and costly treatments such as liver transplantation and surgery. An effective and less invasive treatment that is suitable for the pediatric population is not available.[0003]It is well understood and accepted that the therapeutic needs of children are sufficiently different than those of adults as to require specific studies of medications in children. For example, oral administr...

Claims

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Application Information

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IPC IPC(8): A61K31/554A61P1/16A61K31/4436A61K31/38A61K31/4995
CPCA61K31/41C07H15/26A61K31/4965A61K31/4985A61K31/5377A61K31/155A61K31/38A61K31/554A61K31/7042A61K31/4436A61K31/4995A61K45/06C07D281/10C07D337/08C07D409/10C07D487/08A61K31/495A61P1/10A61P1/14A61P1/16A61P1/18A61P13/02A61P17/04A61P35/00A61P3/06A61P43/00A61P7/00A61K9/0053A61K9/0056A61K9/1611A61K9/1617A61K9/1623A61K9/1635A61K9/2009A61K9/2013A61K9/2018A61K9/2027A61K9/2054A61K9/2059A61K9/2081
Inventor GEDULIN, BRONISLAVAGREY, MICHAELO'DONNELL, NIALL
Owner LUMENA PHARMA INC
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