Biologically active material conjugated with biocompatible polymer with 1:1 complex, preparation method thereof and pharmaceutical composition comprising the same

1 . A conjugate of biocompatible polymer-biologically active material, wherein the activated biocompatible polymer is conjugated to a carboxyl group of biologically active material at a molar ratio of 1:1.

2 . The conjugate according to claim 1 , wherein the biocompatible polymer is selected from the group consisting of polyethylene glycol, polypropylene glycol, polyoxyethylene, polytrimethylene glycol, polylactic acid and derivatives thereof, polyacrylic acid and derivatives thereof, poly(amino acid), polyurethane, polyphosphazene, poly(L-lysine), polyalkylene oxide, polysaccharide, dextran, polyvinyl pyrrolidone, polyvinyl alcohol, polyacryl amide, and copolymers thereof.

3 . The conjugate according to claim 1 , wherein the biologically active material is selected from the group consisting of α-, β-, γ-interferon, parathyroid hormone, asparaginase, arginase, arginine deiminase, adenosine deaminase, superoxide dismutase, endotoxinase, catalase, chymotrypsin, lipase, uricase, adenosine diphosphatase, tyrosinase, glucose oxidase, glucosidase, galactosidase, glucouronidase, hemoglobin, blood factors VII, VIII and IX, immunoglobulin, cytokine, granulocyte colony stimulating factor, granulocyte macrophage colony stimulating factor, platelet derived growth factor, lectin, ricin, tumor necrosis factor, transforming growth factor, epidermal growth factor, calcitonin, insulin, synthetic enkephalin, interleukin, erythropoietin, growth hormone releasing peptide, luteal hormone-releasing hormone and derivatives thereof, hypothalamic releasing factors, calcitonin gene related peptides, thyroid stimulating hormone and thymic humoral factor.

4 . The conjugate according to claim 1 , wherein the biologically active material is interferon, G-CSF, or parathyroid hormone.

5 . A pharmaceutical composition comprising a pharmaceutically acceptable amount of the conjugate according to claim 1 and a pharmaceutically acceptable carrier.

6 . A method of preparation of a conjugate of biocompatible polymer-biologically active material, wherein an activated biocompatible polymer is conjugated to a carboxyl group of the biologically active material at a molar ratio of 1:1, comprising the step of conjugating the biologically active material to the activated biocompatible polymer with the stepwise addition of a coupling reagent, wherein the molar ratio of the biologically active material to the activated biocompatible polymer is 1:1 to 1:20, the ratio of the biologically active material to the coupling reagent is 1:1 to 1:50, and pH is in the range of 2 to 5.

7 . The method according to claim 6 , wherein the biocompatible polymer is activated with a reactive functional group which is able to react with a carboxylic acid and/or a reactive carbonyl group.

8 . The method according to claim 6 , wherein the biocompatible polymer is selected from the group consisting of polyethylene glycol, polypropylene glycol, polyoxyethylene, polytrimethylene glycol, polylactic acid and derivatives thereof, polyacrylic acid and derivatives thereof, poly(amino acid), polyurethane, polyphosphazene, poly(L-lysine), polyalkylene oxide, polysaccharide, dextran, polyvinyl pyrrolidone, polyvinyl alcohol, polyacryl amide, and copolymers thereof.

9 . The method according to claim 6 , wherein the biologically active material is selected from the group consisting of α-, β-, γ-interferon, parathyroid hormone, asparaginase, arginase, arginine deiminase, adenosine deaminase, superoxide dismutase, endotoxinase, catalase, chymotrypsin, lipase, uricase, adenosine diphosphatase, tyrosinase, glucose oxidase, glucosidase, galactosidase, glucouronidase, hemoglobin, blood factors VII, VIII and IX, immunoglobulin, cytokine, granulocyte colony stimulating factor, granulocyte macrophage colony stimulating factor, platelet derived growth factor, lectin, ricin, tumor necrosis factor, transforming growth factor, epidermal growth factor, calcitonin, insulin, synthetic enkephalin, interleukin, erythropoietin, growth hormone releasing peptide, luteal hormone-releasing hormone and derivatives thereof, hypothalamic releasing factors, calcitonin gene related peptides, thyroid stimulating hormone and thymic humoral factor.

10 . The conjugate of biocompatible polymer-biologically active material prepared according to claim 6 , wherein the biocompatible polymer is conjugated to a carboxyl group of the biologically active material at a molar ratio of 1:1.

11 . The conjugate of biocompatible polymer-biologically active material, wherein the biocompatible polymer is conjugated to the C-terminus of the biologically active material at a molar ratio of 1:1.

12 . The conjugate according to claim 11 , wherein the biocompatible polymer is selected from the group consisting of polyethylene glycol, polypropylene glycol, polyoxyethylene, polytrimethylene glycol, polylactic acid and derivatives thereof, polyacrylic acid and derivatives thereof, poly(amino acid), polyurethane, polyphosphazene, poly(L-lysine), polyalkylene oxide, polysaccharide, dextran, polyvinyl pyrrolidone, polyvinyl alcohol, polyacryl amide, and copolymers thereof.

13 . The conjugate according to claim 11 , wherein the biologically active material is selected from the group consisting of α-, β-, γ-interferon, parathyroid hormone, asparaginase, arginase, arginine deiminase, adenosine deaminase, superoxide dismutase, endotoxinase, catalase, chymotrypsin, lipase, uricase, adenosine diphosphatase, tyrosinase, glucose oxidase, glucosidase, galactosidase, glucouronidase, hemoglobin, blood factors VII, VIII and IX, immunoglobulin, cytokine, granulocyte colony stimulating factor, granulocyte macrophage colony stimulating factor, platelet derived growth factor, lectin, ricin, tumor necrosis factor, transforming growth factor, epidermal growth factor, calcitonin, insulin, synthetic enkephalin, interleukin, erythropoietin, growth hormone releasing peptide, luteal hormone-releasing hormone and derivatives thereof, hypothalamic releasing factors, calcitonin gene related peptides, thyroid stimulating hormone and thymic humoral factor.

14 . The conjugate according to claim 13 , wherein the biologically active material is interferon, G-CSF, or parathyroid hormone.

15 . A pharmaceutical composition comprising a pharmaceutically acceptable amount of the conjugate according to claim 11 and a pharmaceutically acceptable carrier.

16 . A method of preparation of a conjugate of biocompatible polymer-biologically active material, wherein an activated biocompatible polymer is conjugated at the C-terminus of the biologically active material with a molar ratio of 1:1, comprising the step of conjugating the biologically active material to the activated biocompatible polymer with stepwise addition of a coupling reagent, wherein the molar ratio of the biologically active material to the activated the biocompatible polymer is 1:1 to 1:20, the ratio of the biologically active material to the coupling reagent is 1:1 to 1:50, and pH is in the range of 2 to 5.

17 . The method according to claim 16 , wherein the biocompatible polymer is activated with a reactive functional group which is able to react with the a carboxylic acid and/or a reactive carbonyl group.

18 . The conjugate according to claim 16 , wherein the biocompatible polymer is selected from the group consisting of polyethylene glycol, polypropylene glycol, polyoxyethylene, polytrimethylene glycol, polylactic acid and derivatives thereof, polyacrylic acid and derivatives thereof, poly(amino acid), polyurethane, polyphosphazene, poly(L-lysine), polyalkylene oxide, polysaccharide, dextran, polyvinyl pyrrolidone, polyvinyl alcohol, polyacryl amide, and copolymers thereof.

19 . The conjugate according to claim 16 , wherein the biologically active material is selected from the group consisting of α-, β-, γ-interferon, parathyroid hormone, asparaginase, arginase, arginine deiminase, adenosine deaminase, superoxide dismutase, endotoxinase, catalase, chymotrypsin, lipase, uricase, adenosine diphosphatase, tyrosinase, glucose oxidase, glucosidase, galactosidase, glucouronidase, hemoglobin, blood factors VII, VIII and IX, immunoglobulin, cytokine, granulocyte colony stimulating factor, granulocyte macrophage colony stimulating factor, platelet derived growth factor, lectin, ricin, tumor necrosis factor, transforming growth factor, epidermal growth factor, calcitonin, insulin, synthetic enkephalin, interleukin, erythropoietin, growth hormone releasing peptide, luteal hormone-releasing hormone and derivatives thereof, hypothalamic releasing factors, calcitonin gene related peptides, thyroid stimulating hormone and thymic humoral factor.

20 . The conjugate of biocompatible polymer-biologically active material prepared according to claim 16 , wherein the biocompatible polymer is conjugated to the C-terminus of the biologically active material at a molar ratio of 1:1.