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Claims for Patent: 8,748,573

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Claims for Patent: 8,748,573

Title:Formulations comprising linaclotide
Abstract: The present invention relates to stable compositions comprising linaclotide, as well as to various methods and processes for the preparation and use of the compositions.
Inventor(s): Fretzen; Angelika (Somerville, MA), Witowski; Steven (Melrose, MA), Grossi; Alfredo (Somerville, MA), Zhao; Hong (Somerville, MA), Dedhiya; Mahendra (Pomona, NY), Mo; Yun (Commack, NY)
Assignee: Ironwood Pharmaceuticals, Inc. (Cambridge, MA)
Application Number:12/851,330
Patent Claims: 1. A method of treating chronic constipation or constipation-predominant irritable bowel syndrome in a patient in need thereof, comprising administering to the patient an oral, solid pharmaceutical dosage form comprising: between 100 .mu.g and 300 .mu.g of a peptide consisting of the amino acid sequence Cys.sub.1 Cys.sub.2 Glu.sub.3 Tyr.sub.4 Cys.sub.5 Cys.sub.6 Asn.sub.7 Pro.sub.8 Ala.sub.9 Cys.sub.10 Thr.sub.11 Gly.sub.12 Cys.sub.13 Tyr.sub.14 (SEQ ID NO:1) or a pharmaceutically acceptable salt thereof, wherein the peptide includes disulfide bonds between Cys.sub.1 and Cys.sub.6, Cys.sub.2 and Cys.sub.10, and Cys.sub.5 and Cys.sub.13; leucine in a molar ratio of leucine to the peptide between 40:1 and 20:1; and Ca.sup.2+ or a salt thereof in a molar ratio of Ca.sup.2+ the peptide between 70:1 and 50:1.

2. The method of claim 1, wherein the oral, solid pharmaceutical dosage form further comprises a polymer selected from polyvinyl pyrrolidone, polyvinyl alcohol, hydroxylpropyl methyl cellulose and mixtures thereof in an amount between 0.01 wt. % and 2 wt. % relative to the total weight of the oral dosage form.

3. A method of treating chronic constipation or constipation-predominant irritable bowel syndrome in a patient in need thereof, comprising administering to the patient an oral, solid pharmaceutical dosage form comprising a peptide consisting of the amino acid sequence Cys.sub.1 Cys.sub.2 Glu.sub.3 Tyr.sub.4 Cys.sub.5 Cys.sub.6 Asn.sub.7 Pro.sub.8 Ala.sub.9 Cys.sub.10 Thr.sub.11 Gly.sub.12 Cys.sub.13 Tyr.sub.14 (SEQ ID NO:1) or a pharmaceutically acceptable salt thereof, wherein the peptide includes disulfide bonds between Cys.sub.1 and Cys.sub.6, Cys.sub.2 and Cys.sub.10, and Cys.sub.5 and Cys.sub.13 in an amount between 0.2% by weight and 0.4% by weight, leucine in an amount between 0.5% by weight and 0.8% by weight, and a Ca.sup.2+ salt in an amount between 1.4% by weight and 1.65% by weight relative to the total weight of the oral dosage form.

4. The method of claim 3, wherein the leucine is present in the oral pharmaceutical dosage form in an amount between 0.6% by weight and 0.75% by weight, and the Ca.sup.2+ salt is present in the oral pharmaceutical dosage form in an amount between in an amount between 1.45% by weight and 1.65% by weight relative to the total weight of the oral dosage form.

5. The method of claim 3, wherein the amino acid is leucine and wherein the Ca.sup.2+ salt is in the form of calcium chloride.

6. The method of claim 1, wherein the amino acid is leucine and wherein Ca.sup.2+ is in the form of calcium chloride.

7. The method of claim 3, wherein the oral, solid pharmaceutical dosage form further comprises a polymer selected from polyvinyl pyrrolidone, polyvinyl alcohol, hydroxylpropyl methyl cellulose and mixtures thereof in an amount between 0.01 and 2 wt. % relative to the total weight of the oral dosage form.

8. The method of claim 1, wherein the Ca.sup.2+ or salt thereof and leucine are present in a molar ratio of at least 1.5:1.

9. The method of claim 1, wherein the dosage form further comprises a hydrolysis product of linaclotide at a concentration between 0.1 and 4 wt. %.

10. The method of claim 3, wherein the dosage form further comprises a hydrolysis product of linaclotide at a concentration between 0.1 and 4 wt. %.
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