NOVEL FORMULATION OF FUSION PROTEIN

1 . A pharmaceutical liquid formulation comprising:

a. high concentration of a pharmacologically active fusion protein;

b. a histidine buffer;

c. a suitable amino acid;

d. a stabilizer;

e. a surfactant; and

f. pH selected from about 6.5 to about 7.5;

2 . The pharmaceutical formulation according to claim 1 , wherein the concentration of the pharmacologically active fusion protein is at least 100 mg/ml.

3 . The pharmaceutical formulation according to claim 2 , wherein the concentration of pharmacologically active fusion protein is about 50 mg/0.4 ml, about 87.5 mg/0.7 ml, or about 125 mg/ml.

4 - 5 . (canceled)

6 . The pharmaceutical formulation according to claim 1 , wherein the histidine buffer is present from about 100 mM to about 200 mM.

7 . (canceled)

8 . The pharmaceutical formulation according to claim 1 , wherein the concentration of the suitable amino acid is selected from about 10 mM to about 200 mM; and

wherein the suitable amino acid is selected from arginine, lysine, glycine, and proline, and a suitable salt thereof.

9 - 11 . (canceled)

12 . The pharmaceutical formulation according to claim 8 , wherein the suitable amino acid is lysine; and wherein the concentration of the suitable amino acid is about 10 mM to about 100 mM.

13 . The pharmaceutical formulation according to claim 12 , wherein the suitable amino acid is lysine; and wherein the concentration of the suitable amino acid is about 50 mM.

14 . The pharmaceutical formulation according to claim 1 , wherein the stabilizer selected from sugar e and cyclodextrin.

15 . The pharmaceutical formulation according to claim 14 , wherein the sugar concentration is lower than concentration of the pharmacologically active fusion protein.

16 . The pharmaceutical formulation according to claim 14 , wherein the sugar is sucrose.

17 . The pharmaceutical formulation according to claim 16 , wherein the ratio of the pharmacologically active fusion protein to sucrose is not more than 1:0.9, 1:0.8, 1:0.7, 1:0.6, or 1:0.5.

18 . The pharmaceutical formulation according to claim 14 , wherein the concentration of sucrose is from about 110 mg/mL to about 120 mg/mL.

19 . (canceled)

20 . The pharmaceutical formulation according to claim 1 , wherein the surfactant is selected from polysorbate and poloxamer 188.

21 . (canceled)

22 . The pharmaceutical formulation according to claim 20 , wherein the surfactant is Poloxamer 188; and wherein the concentration of the surfactant is from about 1 mg/mL to 10 mg/mL.

23 . The pharmaceutical formulation according to claim 22 , wherein the surfactant is Poloxamer 188; and wherein the concentration of the surfactant is from about 5 mg/mL to 8 mg/mL.

24 . The pharmaceutical formulation according to claim 1 , wherein the pH of the pharmaceutical liquid formulation is about pH 6.8, about pH 6.9, about pH 7.0, about pH 7.1, about pH 7.2, about pH 7.3, or about pH 7.4.

25 . (canceled)

26 . The pharmaceutical formulation according to claim 1 , wherein the pharmacologically active fusion protein comprises a receptor selected from CTLA4, TNFR, VEGF, HER-2, and PCSK9 fused with constant region of IgG1.

27 . The pharmaceutical formulation according to claim 1 , wherein the pharmacologically active fusion protein is CTLA4-Ig fusion protein.

28 . (canceled)

29 . The stable pharmaceutical liquid formulation according to claim 1 , wherein the pharmaceutical liquid formulation comprises:

a. high concentration of the pharmacologically active fusion protein;

b. the histidine buffer;

c. lysine;

d. sucrose;

e. poloxamer 188; and

f. pH of about pH 6.8, about pH 6.9, about pH 7.0, about pH 7.1, about pH 7.2, about pH 7.3, or about pH 7.4.

30 . (canceled)

31 . A stable pharmaceutical liquid formulation of fusion protein comprising:

a. high concentration of pharmacologically active fusion protein;

b. histidine buffer;

c. optionally suitable amino acid;

d. sucrose;

e. poloxamer 188 and;

f. pH of about pH 6.8, about pH 6.9, about pH 7.0, about pH 7.1, about pH 7.2, about pH 7.3, or about pH 7.4.

32 . A drug delivery device comprising a pharmaceutical liquid formulation according to claim 1 .

33 . (canceled)

34 . The pharmaceutical liquid formulation according to claim 1 , wherein the kinematic viscosity of the pharmaceutical liquid formulation is about 7 cps, about 8 cps, about 9 cps, about 10 cps, about 11 cps, about 12 cps, about 13 cps, about 14 cps, or about 15 cps.

35 . (canceled)

36 . The pharmaceutical liquid formulation according to claim 1 , wherein the osmolality of the pharmaceutical liquid formulation is about 700 mOsm/kg, about 710 mOsm/kg, about 720 mOsm/kg, about 730 mOsm/kg, about 740 mOsm/kg, about 750 mOsm/kg, about 760 mOsm/kg, about 770 mOsm/kg, about 780 mOsm/kg, about 790 mOsm/kg, about 800 mOsm/kg, about 810 mOsm/kg, about 820 mOsm/kg, about 830 mOsm/kg, about 840 mOsm/kg, about 850 mOsm/kg, about 860 mOsm/kg, about 870 mOsm/kg, about 890 mOsm/kg, or about 900 mOsm/kg.

37 . The pharmaceutical liquid formulation according to claim 1 , wherein the pharmaceutical liquid formulation comprises reduced amount of low molecular weight (LMW) impurities compared to pharmacologically active fusion protein formulated with phosphate buffer.

38 . The pharmaceutical liquid formulation according to claim 1 , wherein the pharmaceutical liquid formulation is essentially free of histidine amino acid.

39 . The pharmaceutical liquid formulation according to claim 1 , wherein the pharmaceutical liquid formulation comprises reduced amount of high molecular weight (HMW) impurities compared to the pharmacologically active fusion protein formulated with phosphate buffer.

40 . The pharmaceutical liquid formulation according to claim 1 , wherein the pharmaceutical liquid formulation comprises monomer more than 95%, 96%, 97%, 98% analysed by SEC-HPLC or CE-SDS; wherein low molecular weight (LMW) impurities in an amount below 10% or 9% or 8% or 7% or 6% or 5% or 4% or 3% or 2% or 1% when stored at 25° C. for 4 weeks analysed by SEC-HPLC or CE-SDS; and wherein high molecular weight (HMW) impurities in an amount below 10% or 9% or 8% or 7% or 6% or 5% or 4% or 3% or 2% or 1% when stored at 25° C. for 4 weeks analysed by SEC-HPLC or CE-SDS.