Crystallized oxalate decarboxylase and methods of use
Pharmaceutical compositions comprising spray-dried oxalate decarboxylase crystals are disclosed. Methods to treat a disorder associated with elevated oxalate concentration using compositions comprising spray-dried oxalate decarboxylase crystals are also disclosed.
1. A method of reducing oxalate concentration in the plasma of a subject, the method comprising administering to the subject at least one capsule comprising crystals of spray-dried oxalate decarboxylase comprising the amino acid sequence of SEQ ID NO:1, wherein the thiol moiety at Cys383 is protected by a thiol protecting group, and wherein the crystals have a Hausner ratio of about 1.00 to about 1.59, thereby to reduce oxalate concentration in the plasma of the subject.
2. The method of claim 1 , wherein the capsule further comprises an excipient.
3. The method of claim 2 , wherein the excipient is a sugar.
4. The method of claim 3 , wherein the sugar is a disaccharide or a monosaccharide.
5. The method of claim 4 , wherein the sugar is selected from trehalose, sucrose, and glucose.
6. The method of claim 5 , wherein the sugar is trehalose.
7. The method of claim 1 , wherein the crystals have a Hausner ratio of about 1.00 to about 1.34.
8. The method of claim 7 , wherein the crystals have a Hausner ratio of about 1.00 to about 1.25.
9. The method of claim 8 , wherein the crystals have a Hausner ratio of about 1.00 to about 1.18.
10. The method of claim 9 , wherein the crystals have a Hausner ratio of about 1.12 to about 1.18.
11. The method of claim 8 , wherein the crystals have a Hausner ratio of about 1.19 to about 1.25.
12. The method of claim 7 , wherein the crystals have a Hausner ratio of about 1.26 to about 1.34.
13. The method of claim 1 , wherein the crystals have a Hausner ratio of about 1.34.
14. The method of claim 1 , wherein the capsule comprises at least 5,000 U of oxalate decarboxylase crystals.
15. The method of claim 1 , wherein the capsule comprises at least 3,000 U of oxalate decarboxylase crystals.