Enterically coated cysteamine, cystamine and derivatives thereof
The disclosure provides oral cysteamine and cystamine formulations useful for treating cystinosis and neurodegenerative diseases and disorders. The formulations provide controlled release compositions that improve quality of life and reduced side-effects.
1. An enterically-coated composition comprising:
a core of cysteamine bitartrate and cystamine or a pharmaceutically-acceptable salt thereof, mixed with one or more pharmaceutically-acceptable binders; and
an enteric coating which encases the core, wherein the enteric coating begins to dissolve in an aqueous solution at a pH between about 4.5 to about 5.5.
2. The composition of claim 1 , wherein the composition is in the form of a tablet or granules.
3. The composition of claim 2 , wherein the granules are loaded into a capsule.
4. The composition of claim 1 , wherein the enteric coating comprises a compound selected from the group consisting of polymerized gelatin, shellac, methacrylic acid copolymer type CNF, cellulose butyrate phthalate, cellulose hydrogen phthalate, cellulose proprionate phthalate, polyvinyl acetate phthalate (PVAP), cellulose acetate phthalate (CAP), cellulose acetate trimellitate (CAT), hydroxypropyl methylcellulose phthalate, hydroxypropyl methylcellulose acetate, dioxypropyl methylcellulose succinate, carboxymethyl ethylcellulose (CMEC), hydroxypropyl methylcellulose acetate succinate (HPMCAS), and acrylic acid polymers and copolymers formed from methyl acrylate, ethyl acrylate, methyl methacrylate and/or ethyl methacrylate with copolymers of acrylic and methacrylic acid esters.
5. The composition of claim 4 , wherein the enteric coating comprises a methacrylic acid ester.
6. The composition of claim 1 , wherein the composition is formulated for oral administration.
7. A method of treating a subject with nephropathic cystinosis comprising administering a composition of claim 1 twice per day.
8. The method of claim 7 , wherein each administration comprises an amount of cysteamine bitartrate that would yield a dose of 100 to 1000 mg cysteamine free base.
9. The method of claim 7 , wherein administration maintains white blood-cell cystine concentration at less than 1 nmol ½cystine/mg protein.
10. The method of claim 8 , wherein the total daily dose of cysteamine free base is about 1.35 g/m 2 body surface area.
11. A method of lowering the cystine content of cells in patients having nephropathic cystinosis comprising administering a composition of claim 1 .
12. The method of claim 11 , wherein each administration comprises an amount of cysteamine bitartrate that would yield a dose of 100 to 1000 mg cysteamine free base.
13. The method of claim 11 , wherein administration maintains white blood-cell cysteine concentration at less than 1 nmol ½cystine/mg protein.
14. The method of claim 12 , wherein the total daily dose of cysteamine free base is about 1.35 g/m 2 body surface area.