Formulations for a tight junction effector
Enteric compositions comprising one or more tight junction agonists and/or one or more tight junction antagonists are provided. Compositions of the invention may comprise a delayed-release coating disposed over a tight junction agonist and/or tight junction antagonist layer which may be disposed over an inert core. Delayed-release coatings may be substantially stable in gastric fluid and substantially unstable in intestinal fluid, thus providing for substantial release of the tight junction agonist and/or antagonist from the composition in the duodenum or jejunum of the small intestine.
1. An oral dosage composition comprising an effective amount of Larazotide acetate (AT1001), and comprising first delayed-release particles capable of releasing Larazotide acetate in the duodenum of a patient, and second delayed-release particles capable of releasing Larazotide acetate in the jejunum of a patient,
wherein:
the first delayed-release particles comprise:
a first core particle;
a coat comprising Larazotide acetate over the first core particle; and
a delayed-release coating outside the coat comprising Larazotide acetate, the delayed-release coating comprising a co-polymer of acrylate or methacrylate, and being stable in simulated gastric fluid and releasing at least 70% of the Larazotide acetate in the first delayed-release particles by about 60 minutes of exposure to simulated intestinal fluid having a pH of greater than 5; and
the second delayed-release particles comprise:
a second core particle;
a coat comprising Larazotide acetate over the second core particles; and
a delayed-release coating outside the coat comprising Larazotide acetate, the delayed-release coating comprising a co-polymer of acrylate or methacrylate, and being stable in simulated gastric fluid and releasing at least 70% of the Larazotide acetate in the second delayed-release particles by about 30 and about 90 minutes of exposure to simulated intestinal fluid having a pH of greater than 5.
2. The composition of claim 1 , wherein the first and second core particles have an average size of from 15 to 40 mesh.
3. The composition of claim 1 , wherein the core particle material comprises an oxide, cellulose, a polymer, an inorganic salt, or a sugar.
4. The composition of claim 1 , wherein the core particle material is a sugar.
5. The composition of claim 1 , wherein the delayed-release coatings comprise polymethacrylate.
6. The composition of claim 5 , wherein the polymethacrylate is a 1:1 copolymer of polymethacrylic acid and ethyl acrylate.
7. The composition of claim 1 , further comprising a sealing coat disposed over the coats comprising Larazotide acetate.
8. The composition of claim 7 , wherein the sealing coat comprises sugar, polyethylene glycol, polyvinylpyrrolidone, polyvinyl alcohol, polyvinyl acetate, hydroxypropyl cellulose, methylcellulose, ethylcellulose, and/or hydroxypropylmethylcellulose (HPMC).
9. The composition of claim 7 , wherein the sealing coat comprises HPMC.
10. The composition of claim 1 , further comprising a top coat around the outside of the first delayed-release particles and the second delayed-release particles.
11. The composition of claim 10 , wherein the top coat comprises sugar, polyethylene glycol, polyvinylpyrrolidone, polyvinyl alcohol, polyvinyl acetate, hydroxypropyl cellulose, methylcellulose, ethylcellulose, and/or hydroxypropylmethylcellulose (HPMC).
12. The composition of claim 10 , wherein the sealing coat comprises HPMC.
13. The composition of claim 1 , wherein the coats comprising Larazotide acetate further comprise a pharmaceutically-acceptable binder.
14. The composition of claim 13 , wherein the binder comprises a natural sugar, starch, gelatin, corn sweetener, gum, carboxymethylcellulose, polyvinyl pyrrolidone, hydroxypropyl cellulose, hydroxyethyl cellulose, ethylcellulose, polymethacrylate, polyethylene glycol, or wax.
15. The composition of claim 13 , wherein the binder comprises sugar.
16. The composition of claim 1 , wherein the delayed-release coatings further comprise talc.
17. The composition of claim 1 , further comprising an inert processing aid and/or plasticizer.
18. The composition of claim 17 , wherein the inert processing aid comprises silicon dioxide, talc, and/or magnesium stearate.
19. The composition of claim 17 , wherein the plasticizer comprises citric acid ester, triacetin, phthalic acid ester, dibutyl sebacate, cetyl alcohol, polyethylene glycol, and/or polysorbate.
20. The composition of claim 1 , wherein the composition is a capsule.
21. The composition of claim 9 , wherein:
the delayed-release coating of the first delayed-release particle comprises a 1:1 methacrylic acid-ethyl acrylate copolymer, and is about 20% of the weight of the first particle having the coat comprising Larazotide acetate over the first particle; and
the delayed-release coating of the second delayed-release particle comprises a 1:1 methacrylic acid-ethyl acrylate copolymer, and is about 70% of the weight of the second particle having the coat comprising Larazotide acetate over the second particle.
22. The composition of claim 1 , wherein the simulated gastric fluid and simulated intestinal fluid do not contain enzymes.
23. The composition of claim 21 , wherein the composition comprises the Larazotide acetate at from 0.1% to about 6% based on the total weight of the composition.
24. The composition of claim 1 , wherein the simulated gastric fluid has a pH of about 1.2.
25. The composition of claim 24 , wherein less than 10% of the Larazotide acetate is released in the presence of simulated gastric fluid in approximately 60 minutes.
26. An oral dosage composition comprising a population of delayed-release particles containing Larazotide acetate (AT1001), the population of delayed release particles consisting of first delayed-release particles capable of releasing Larazotide acetate in the duodenum of a patient, and second delayed-release particles capable of releasing Larazotide acetate in the jejunum of a patient,
wherein:
the first delayed-release particles comprise:
a first core particle;
a coat comprising Larazotide acetate over the first core particle; and
a delayed-release coating outside the coat comprising Larazotide acetate, the delayed-release coating comprising a co-polymer of acrylate or methacrylate, and being stable in simulated gastric fluid and releasing at least 70% of the Larazotide acetate in the first delayed-release particles by about 60 minutes of exposure to simulated intestinal fluid having a pH of greater than 5; and
the second delayed-release particles comprise:
a second core particle;
a coat comprising Larazotide acetate over the second core particles; and
a delayed-release coating outside the coat comprising Larazotide acetate, the delayed-release coating comprising a co-polymer of acrylate or methacrylate, and being stable in simulated gastric fluid and releasing at least 70% of the Larazotide acetate in the second delayed-release particles by about 30 and about 90 minutes of exposure to simulated intestinal fluid having a pH of greater than 5.
27. The oral dosage composition of claim 1 , wherein the simulated intestinal fluid has a pH of 6.8.
28. The oral dosage composition of claim 26 , wherein the simulated intestinal fluid has a pH of 6.8.