Covalently attached complex of alpha-1-proteinase inhibitor with a water soluble polymer

Claim 2

A process for producing a covalently attached complex of alpha-1-proteinase inhibitor with a water soluble polymer having hydroxy groups pendant to the polymer backbone, which hydroxy groups and amino groups pendant to alpha-l-proteinase inhibitor are chemically reactive with a polyfunctional coupling compound, comprising the steps of: (a) contacting the water soluble polymer having hydroxy groups pendant to the polymer backbone, which hydroxy groups are chemically reactive with a polyfunctional coupling compound, with a polyfunctional coupling compound having functional groups which are reactive with said hydroxy groups in a chemical activation reaction to obtain an activated intermedicate which is reactive with amino groups pendant to the protein, alpha-1-proteinase inhibitor; and (b) contacting the activated intermediate from step (a) with alpha-1-proteinase inhibitor in a chemical coupling reaction to effect covalent attachment and to thereby obtain a covalently attached complex of alpha-1-proteinase inhibitor with the water soluble polymer; and, optionally, the further stept of: (c) isolating the covalently attached complex of alpha-I-proteinase inhibitor with the water soluble polymer obtained in step (b) from residual uncoupled alpha-I-proteinase inhibitor and water soluble polymer undesirable compounds in the chemical coupling reaction mixture.

Claim 3

A process according to claim 1 wherein the water soluble polymer having hydroxy groups pendant to the polymer backbone, which hydroxy groups are chemically reactive with a polyfunctional coupling compound, is selected from (a) dextran and dextran derivatives including dextran sulphate, p-aminoethyl cross-linked dextran, and carboxymethyl dextran; (b) cellulose and cellulose derivatives including methyl cellulose and carboxymethyl cellulose; (c) starch and dextrines derived from starch and dextrine derivatives; (d) polyalkylene glycols and derivatives thereof including polyethylene glycols and methoxy- polyethene glycols; (e) heparin; (f) polyvinyl alcohol; and (g) polyvinylpyrrolidone.

Claim 4

A process according to claim 3 wherein the polyfunctional coupling compound is selected from (a) a cyanogen halide wherein the halide is bromide, chloride or iodide; (b) cyanuric chloride (2,4,6-trichloro-s-1,3,5-triazine) and 2-amino-4,6-dichloro-s-1,3,5-triazine; (c) tolylene diisocyanate; (d) tolylene diisothiocyanate; and (e) 1,4-diaminobenzene combined with cyanogen bromide.

Claim 5

A process according to claim 3 including the further step of: (c) isolating the covalently attached complex of alpha-I-proteinase inhibitor with the water soluble polymer obtained in step (b) from residual uncoupled alpha-l-proteinase inhibitor and water soluble polymer undesirable compounds in the chemical coupling reaction mixture by means, effective to separate the complex from residual uncomplexed alpha-1-proteinase inhibitor and water soluble.polymer and undesirable compounds in the chemical coupling reaction mixture obtained in step (b), selected from ion exchange chromatography, affinity chromatography, dialysis, ultrafiltration and electrophoresis techniques.

Claim 6

A process according to claim 3 comprising the steps of: (a) contacting a water soluble polymer having hydroxy groups pendant to the polymer backbone, which hydroxy groups are chemically reactive with a polyfunctional coupling compound, selected from (i) dextran and dextran derivatives including dextran sulphate, p-aminoethyl cross-linked dextran, and carboxymethyl dextran, (ii) dextrines and dextrine derivatives, (iii) cellulose and cellulose derivatives including methyl cellulose and carboxymethyl cellulose, and (iv) polyethylene glycols and derivatives thereof including methoxypolyethylene glycols, with a polyfunctional coupling compound selected from (i) cyanogen bromide and (ii) cyanuric chloride (2,4,6-trichloro-s-1,3,5-triazine) and 2-amino-4,6-dichloro-s-1,3,5-triazine in a chemical activation reaction to obtain an activated intermediate which is reactive with amino groups pendant to the protein, alpha-1-proteinase inhibitor; and (b) contacting the activated intermediate from step (a) with alpha-1-proteinase inhibitor in a chemical coupling reaction to effect covalent attachment and to thereby obtain a covalently attached complex of alpha-1-proteinase inhibitor with the water soluble polymer; and, optionally, the further step of: (c) isolating the covalently attached complex of alpha-1-proteinase inhibitor with the water soluble polymer obtained in step (b) from residual uncoupled alpha-1-proteinase inhibitor, water soluble polymer and undesirable compounds in the chemical coupling reaction mixture by ion exchange chromatography and ultrafiltration techniques.

Claim 7

A process according to claim 5 wherein the water soluble polymer is selected from dextran and dextran derivatives and the polyfunctional coupling compound is yanogen bromide.

Claim 8

A covalently attached complex of alpha-1-proteinase inhibitor with a water soluble polymer produced by the process of claim 1, 4, 5 or 6.

Claim 9

A pharmaceutical preparation comprising a pharmaceutically acceptable and useful concentration of the complex of claim 7 and a pharmaceutically acceptable carrier.

Claim 10

A sterilized covalently attached complex of alpha-1-proteinase inhibitor with a water soluble polymer produced by sterilizing the complex produced by the process of claim 1, 3, 5 or 6 to render the complex non-viral infective.

Claim 11

A sterilized pharmaceutical preparation produced by sterilizing the pharmaceutical preparation of claim 8 to render the preparation non-viral infective.

Claim 12

A method for treating pulmonary emphysema and respiratory distress syndrome which comprises administering to a patient the pharmaceutical preparation of claim 8 or 10.

Claim 13

A process according to claim 1 comprising the further addition of about 1.0 to 300 mg of antioxidant catalase enzyme per g of dextran (i) in step (b) along with the alpha-1-proteinase inhibitor to obtain a covalently attached complex of alpha-1-proteinase inhibitor and water insoluble polymer and catalase, or (ii) following step (b) to obtain an ionic association of the covalently attached complex of alpha-I-proteinase inhibitor and the water soluble polymer with catalase.

Claim 14

A process according to claim 1 comprising the further addition of about 1.0 to 300 mg of antioxidant catalase enzyme per g of dextran (i) in step (b) along with the alpha-1-proteinase inhibitor to obtain a covalently attached complex of alpha-1-proteinase inhibitor and water insoluble polymer and catalase, or (ii) following step (b) to obtain an ionic association of the covalently attached complex of alpha-1-proteinase inhibitor and the water soluble polymer with catalase.

Claim 15

A process according to claim 5 comprising the further addition of about 1.0 to 300 mg of antioxidant catalase enzyme per g of dextran (i) in step (b) along with the alpha-1-proteinase inhibitor to obtain a covalently attached complex of alpha-1-proteinase inhibitor and water insoluble polymer and catalase, or (ii) following step (b) to obtain an ionic association of the covalently attached complex of alpha-1-proteinase inhibitor and the water soluble polymer with catalase.

Claim 16

A process according to claim 5 comprising the further addition of about 1.0 to 300 mg of antioxidant catalase enzyme per g of dextran (i) in step (b) along with the alpha-1-proteinase inhibitor to obtain a covalently attached complex of alpha-1-proteinase inhibitor and water insoluble polymer and catalase, or (ii) following step (b) to obtain an ionic association of the covalently attached complex of alpha-1-proteinase inhibitor and the water soluble polymer with catalase.

Claim 17

A process according to claim 6 comprising the further addition of about 100 mg of antioxidant beef liver catalase enzyme per g of dextran (i) in step (b) along with the alpha-1-proteinase inhibitor to obtain a covalently attached complex of alpha-1-proteinase inhibitor and water insoluble polymer and catalase, or (ii) following step (b) to obtain an ionic association of the covalently attached complex of alpha-1-prateinase inhibitor and the water soluble polymer with catalase.

Claim 18

A covalently attached complex of alpha-1-proteinase inhibitor, a water-soluble polymer, and antioxidant catalase produced according to claim 12, 13, 14, 15 or 16.

Claim 19

A pharmaceutical preparation comprising a pharmaceutically acceptable and useful concentration of the complex of claim 17 and a pharmaceutically acceptable carrier.