Arecor Limited

Barry Kingston Derham

Jan Jezek

Guy Casy

Nikki Royle

Karolina Zapadka

The present invention provides an aqueous solution comprising an antibody protein at a concentration of at least about 10 mg/mL and an oligomer of ethyleneimine, wherein the number of repeating units of ethyleneimine (n) in the oligomer is in the range of n=2-12.

Stabilized aqueous antibody compositions

The invention relates to the discovery that the addition of aromatic carboxylate ions inhibit protein instability caused by aromatic preservatives. Thus, the invention relates to compositions, preferably aqueous compositions, comprising a protein, an aromatic preservative and aromatic carboxylate ions. The proteins remain stable and suitable for storage at ambient temperatures or lower, even in aqueous form. Preferably, the aqueous composition comprises a protein, a phenolic preservative and benzoate ions, wherein the pH of the composition is at least 1 unit greater than the pKof benzoic acid. The invention also provides methods of reducing protein degradation by aromatic preservatives in an aqueous formulation of a protein susceptible to such degradation, comprising the step of adding aromatic carboxylate ions to the formulation wherein the formulation is maintained at a pH that is at least 1 unit greater than the pKof the corresponding aromatic carboxylic acid.

Protein formulations with increased stability

The present invention provides an aqueous solution comprising an antibody protein at a concentration of at least about 10 mg/mL and an oligomer of ethyleneimine, wherein the number of repeating units of ethyleneimine (n) in the oligomer is in the range n=2-12.

There is provided according to the invention an aqueous composition having pH between 4 and 7 comprising (i) glucagon at a concentration of 0.05% w/v or more and (ii) a cationic surfactant selected from benzalkonium salts and benzethonium salts as solubilizing agent in an amount sufficient to dissolve the glucagon in the composition.

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Cambridge, United Kingdom

Barry Kingston Derham