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Claims for Patent: 7,208,141

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Claims for Patent: 7,208,141

Title:Inhalable aztreonam aerosol for treatment and prevention of pulmonary bacterial infections
Abstract:A method and a composition for treatment of pulmonary bacterial infections caused by gram-negative bacteria suitable for treatment of infection caused by Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, Pseudomonas aeruginosa, Haemophilus influenzae, Proteus mirabilis, Enterobacter species, Serratia marcescens as well as those caused by Burkholderia cepacia, Stenotrophomonas maltophilia, Alcaligenes xylosoxidans, and multidrug resistant Pseudomonas aeruginosa, using a concentrated formulation of aztreonam, or a pharmaceutically acceptable salt thereof, delivered as an aerosol or dry powder formulation.
Inventor(s): Montgomery; Alan Bruce (Seattle, WA)
Assignee: Corus Pharma, Inc. (Seattle, WA)
Application Number:10/654,815
Patent Claims: 1. An inhalable aerosol comprising from about 1 to about 250 mg of purified aztreonam or a pharmaceutically acceptable salt thereof in a dry powder form dissolved in a saline solution per one dose, said aerosol suitable for treatment of pulmonary bacterial infections caused by gram-negative bacteria Burkholderia cepacia, Stenotrophomonas maltophilia, Alcaligenes xylosoxidans, and multidrug resistant Pseudomonas aeruginosa, wherein said pharmaceutically acceptable salt is selected from the group consisting of acetate, adipate, alginate, citrate, aspartate, benzoate, benzenesulfonate, bisulfate, bytyrate, camphorate, camphorsulfonate, digluconate, cyclopentanepropionate, dodecylsulfate, ethanesulfonate, glucoheptanoate, glycerophosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethanesulfonate, lysinate, maleate, methanesulfonate, nicotinate, 2-napthalenesulfonate, oxalate, pamoate, pectinate, persulfate, 3-phenylpropionate, picrate, pivalate, propionate, succinate, tartrate, thiocyanate, p-toluenesulfonate and undecanoate.

2. The aerosol of claim 1 comprising from about 1 to about 200 mg or aztreonam or the pharmaceutically acceptable salt thereof per one dose is administered once, two, three or four times a day, with a proviso that when said aerosol is administered more than three times a day, the total dose of aztreonam or the salt thereof does not exceeds 750 mg a day.

3. The aerosol of claim 2 wherein the pharmaceutically acceptable salt is lysinate.

4. The aerosol of claim 3 wherein aztreonam or the salt thereof is dissolved in from about 1 to about 5 ml of an aerosolable solution comprising at least 0.09% of sodium chloride, or an equivalent amount of bromine, iodine or bicarbonate salt.

5. The aerosol of claim 4 wherein said aerosolable solution is a normal saline comprising 0.9% of sodium chloride or diluted saline comprising from about 0.1 to about 0.45% sodium chloride.

6. The aerosol of claim 5 wherein the aerosolable solution has a pH from about 4.5 to about 7.5.

7. The aerosol of claim 6 wherein the aerosolable solution has a pH from about 5.5 to about 7.

8. The aerosol of claim 7 nebulized into an aerosol having a particle size with a mass medium average diameter from about 1 to about 5 .mu..

9. The aerosol of claim 8 wherein aztreonam or the salt thereof are provided in the dry powder form suitable for dissolving in the diluted saline to form an isotonic solution, each the powder and the saline supplied separately and mixed before aerosolization.

10. The aerosol of claim 4 wherein the aerosolable solution is an aqueous solution of the bicarbonate salt.

11. A method for treatment of pulmonary infections caused by gram-negative bacteria Burkholderia cepacia, Stenotrophomonas maltophilia, Alcaligenes xylosoxidans, and multidrug resistant Pseudornonas aeruginosa, said method comprising steps: a. preparing an aztreonam aerosol comprising from about 1 to about 250 mg of purified aztreonam or a pharmaceutically acceptable salt thereof in a dry powder form, wherein said pharmaceutically acceptable salt is selected from the group consisting of acetate, adipate, alginate, citrate, aspartate, benzoate, benzenesulfonate, bisulfate, bytyrate, camphorate, camphorsulfonate, digluconate, cyclopentanepropionate, dodecylsulfate, ethanesulfonate, glucoheptanoate, glycerophosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethanesul fonate, lysinate, maleate, methanesulfonate, nicotinate, 2-napthalenesulfonate, oxalate, pamoate, pectinate, persulfate, 3-phenylpropionate, picrate, pivalate, propionate, succinate, tartrate, thiocyanate, p-toluenesulfonate and undecanoate, said aztreonam or salt dry powder dissolved in from about 1 to about 5 ml of solution containing from about 0.1 to about 0.9% of chloride or an equivalent thereof; and b. delivering said aztreonam or aztreonam salt aerosol to the lung endobronchial space of airways of a patient in need thereof by nebulization of said aerosol into aerosol particles having a mass medium average diameter between about 1 and about 5.mu..

12. The method of claim 11 wherein said aerosol is administered one to twelve times a day, provided that a total daily dose of aztreonam is not higher than 750 mg.

13. The method of claim 12 wherein aztreonam pharmaceutically acceptable salt is lysinate.

14. The method of claim 13 wherein the aztreonam aerosol comprises from about 2 to about 500 mg of aztreonam or a pharmaceutically acceptable salt thereof, dissolved in from about 1 to about 5 ml of solution containing from about 0.09 to about 0.9%, w/v, of sodium chloride or an equivalent amount of bromine, iodine or bicarbonate salt.

15. The method of claim 14 wherein said aerosol has pH between about 4.5 and 7.5 and saline solution contains from about 0.1 to about 0.45% of chloride.

16. The method of claim 13 wherein said aerosol has pH between about 5.5 and 7.

17. The method of claim 16 wherein said aerosol is delivered by a jet, electronic, ultrasonic or atomization nebulizer.

18. The method of claim 17 comprising administration of from about 10 to about 100 mg of aztreonam in the aerosol one to four times a day delivered by the electronic nebulizer.

19. The method of claim 18 comprising administration of from about 10 to about 100 mg of aztreonam in the aerosol one to four times a day.

20. The method of claim 11 wherein a delivered dose of aztreonam or the pharmaceutically acceptable salt thereof into the lung endobronchial space of airways during one administration is at least 25 mg of aztreonam or the salt thereof.

21. The method of claim 11 suitable for treatment of infections caused by the gram-negative bacteria in patients with cystic fibrosis, bronchiectasis, or in the patients on ventilators with pneumonia.

22. A method of treatment for pulmonary infections caused by gram-negative bacteria Burkholderia cepacia, Stenotrophomonas maltophilia, Alcaligenes xylosoxidans, and multidrug resistant Pseudomonas aeruginosa, said method comprising steps: a. preparing an inhalable aztreonam aerosol consisting of from about 1 to about 200 mg of purified aztreonam base, or a pharmaceutically acceptable salt thereof selected from the group consisting of acetate, adipate, alginate, aspartate, benzoate, benzenesulfonate, bisulfate, butyrate, camphorate, camphorsulfonate, chloride, citrate, cyclopentanepropionate, digluconate, dodecylsulfate, ethanesulfonate, glucoheptanoate, glycerophosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2 -hydroxyethanesulfonate, lactate, lysinate, maleate, methanesulfonate, nicotinate, 2-napthalenesulfonate, oxalate, pamoate, pectinate, persulfate, 3-phenylpropionate, picrate, pivalate, phosphate, propionate, succinate, sulphate, tartrate, thiocyanate, p-toluenesulfonate and undecanoate, said aztreonam or the salt thereof dissolved in from about 1 to about 5 ml of an aqueous solution having pH from 5.5 to 7.0; and b. delivering said inhalable aztreonam aerosol to the lung endobronchial space of airways of a patient in need thereof by a jet, electronic, ultrasonic or atomization nebulizer in an aerosol having particle sizes between 1 and 5 microns.

23. The method of claim 22 wherein said aztreonam salt is lysinate and the aqueous solution is a normal or diluted saline comprising from 0.225% to 0.9% of sodium chloride.

24. The method of claim 23 wherein the inhalable aztreonam aerosol is delivered one to twelve times a day, provided that if said aerosol is delivered more then twice a day, a total dose of aztreonam is not higher than 500 mg a day.

25. The method of claim 24 wherein said aztreonam aerosol comprises from about 1 to about 100 mg of the aztreonam per one dosage.

26. The method of claim 25 said aztreonam aerosol comprises from about 10 to about 50 mg of the aztreonam per one dosage.

27. The method of claim 26 wherein said aztreonam aerosol is delivered once, twice, three or four times a day.

28. The method of claim 27 wherein said aerosol is delivered by the jet nebulizer.

29. The method of claim 27 wherein said aerosol is delivered by the electronic nebulizer.

30. The method of claim 22 wherein a delivered dose of aztreonam or the pharmaceutically acceptable salt thereof into the lung endobronchial space of airways during one administration is at least 25 mg of aztreonam or the salt thereof.
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