Crosslinked poly(allylamine) polymer pharmaceutical compositions
Pharmaceutical compositions for and methods of treating an animal, including a human, and methods of preparing such compositions. The pharmaceutical compositions contain crosslinked amine polymers and may be used, for example, to treat diseases or other metabolic conditions in which removal of a target species from the gastrointestinal tract would provide physiological benefits.
1. A crosslinked poly(allylamine) polymer in bead form consisting essentially of (i) 20-25 mol % residue of N,N′-diallyl-1,3-diaminopropane or a salt thereof, (ii) 50-60 mol % residue of 2-Propen-1-ylamine or a salt thereof, and (iii) 20-25 mol % residue of 1,2-dichloroethane wherein (i) the crosslinked poly(allylamine) polymer comprises sp 2 allyl carbon atoms and has a swelling ratio of less than 2 and (ii) the sp 2 allyl carbons comprised by the poly(allylamine) polymer constitute less than 1.0% of the total number of carbon atoms comprised by the crosslinked poly(allylamine) polymer.
2. The crosslinked poly(allylamine) polymer of claim 1 wherein sp 2 allyl carbons comprised by the crosslinked poly(allylamine) polymer constitute less than 0.9% of the total number of carbon atoms comprised by the crosslinked poly(allylamine) polymer.
3. The crosslinked poly(allylamine) polymer of claim 1 wherein sp 2 allyl carbons comprised by the crosslinked poly(allylamine) polymer constitute less than 0.8% of the total number of carbon atoms comprised by the crosslinked poly(allylamine) polymer.
4. The crosslinked poly(allylamine) polymer of claim 1 wherein the crosslinked poly(allylamine) polymer has a stability profile such that upon storage in a sealed enclosure at 25° C. for 12 months the crosslinked poly(allylamine) polymer contains less than 20 ppm H 2 C═CHCH 2 NH 2 as an impurity.
5. The crosslinked poly(allylamine) polymer of claim 1 wherein the crosslinked poly(allylamine) polymer contains less than 5 ppm H 2 C═CHCH 2 NH 2 as an impurity.
6. The crosslinked poly(allylamine) polymer of any of claims 1 and 2 - 5 wherein the crosslinked poly(allylamine) polymer is characterized by a chloride ion binding capacity of at least 3 mEq/g in a SIB assay wherein, in the SIB assay, the crosslinked poly(allylamine) polymer is combined with a SIB buffer consisting of 36 mM NaCl, 20 mM NaH 2 PO 4 and 50 mM 2-(N-morpholino)ethanesulfonic acid (MES) buffered to pH 5.5 at a concentration of 2.5 mg/ml (25 mg dry mass of the crosslinked poly(allylamine) polymer) in 10 mL of the buffer, and the combination is incubated at 37° C. for 1 hour with agitation on an orbital shaker at 200 to 300 rotations per minute.
7. The crosslinked poly(allylamine) polymer of any of claims 1 and 2 - 5 wherein the crosslinked poly(allylamine) polymer is characterized by a chloride to phosphate ion binding ratio of at least 2:1, respectively, in a SIB assay wherein, in the SIB assay, the crosslinked poly(allylamine) polymer is combined with a SIB buffer consisting of 36 mM NaCl, 20 mM NaH 2 PO 4 and 50 mM 2-(N-morpholino)ethanesulfonic acid (MES) buffered to pH 5.5 at a concentration of 2.5 mg/ml (25 mg dry mass of the crosslinked poly(allylamine) polymer) in 10 mL of the buffer, and the combination is incubated at 37° C. for 1 hour with agitation on an orbital shaker at 200 to 300 rotations per minute.
8. The crosslinked poly(allylamine) polymer of claim 6 wherein the crosslinked poly(allylamine) polymer is characterized by a proton-binding capacity and a chloride binding capacity of at least 10 mEq/g in a SGF assay wherein, in the SGF assay, the crosslinked poly(allylamine) polymer is combined with a SGF buffer consisting of 35 mM NaCl and 63 mM HCl at pH 1.2 at a concentration of 2.5 mg/ml (25 mg dry mass of the crosslinked poly(allylamine) polymer) in 10 mL of the SGF buffer, and the combination is incubated at 37° C. for 12-16 hours with agitation on a rotisserie mixer.
9. The crosslinked poly(allylamine) polymer of claim 7 wherein the crosslinked poly(allylamine) polymer is characterized by a proton-binding capacity and a chloride binding capacity of at least 10 mEq/g in a SGF assay wherein, in the SGF assay, the crosslinked poly(allylamine) polymer is combined with a SGF buffer consisting of 35 mM NaCl and 63 mM HCl at pH 1.2 at a concentration of 2.5 mg/ml (25 mg dry mass of the crosslinked poly(allylamine) polymer) in 10 mL of the SGF buffer, and the combination is incubated at 37° C. for 12-16 hours with agitation on a rotisserie mixer.
10. The crosslinked poly(allylamine) polymer of any of claims 1 and 2 - 5 wherein the crosslinked poly(allylamine) polymer is characterized by (i) a chloride ion binding capacity of at least 4 mEq/g in a SIB assay wherein, in the SIB assay, the crosslinked poly(allylamine) polymer is combined with a SIB buffer consisting of 36 mM NaCl, 20 mM NaH 2 PO 4 and 50 mM 2-(N-morpholino)ethanesulfonic acid (MES) buffered to pH 5.5 at a concentration of 2.5 mg/ml (25 mg dry mass of the crosslinked poly(allylamine) polymer) in 10 mL of the buffer, and the combination is incubated at 37° C. for 1 hour with agitation on an orbital shaker at 200 to 300 rotations per minute, and (ii) a proton-binding capacity and a chloride binding capacity of at least 10 mEq/g in a SGF assay wherein, in the SGF assay, the crosslinked poly(allylamine) polymer is combined with a SGF buffer consisting of 35 mM NaCl and 63 mM HCl at pH 1.2 at a concentration of 2.5 mg/ml (25 mg dry mass of the crosslinked poly(allylamine) polymer) in 10 mL of the SGF buffer, and the combination is incubated at 37° C. for 12-16 hours with agitation on a rotisserie mixer.