Interferon tau mutants and methods for making them

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/00 (2006.01) A61K 38/21 (2006.01) C07K 14/555 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2382425

The present invention is directed to the field of animal and human health, and more particularly to pharmacological uses of analogs or mutants of interferon- tau (IFN-.tau.) that differ from native IFN-.tau. because of substitutions of amino acids near the amino terminus of the IFN-.tau. molecule that impart improved biological activity. The IFN-.tau. mutants described in this disclosure have low toxicity, retain the same or slightly reduced antiviral activity compared with highly effective IFN-alpha, and have enhanced antiproliferative activity compared to native IFN-tau, making them useful in treating viral infections, cancer, and immune system diseases including autoimmune diseases. The present invention is also directed to a method for making novel recombinant proteins, especially interferons, interleukins, and cytokines, polypeptide hormones and other biopharmaceuticals that have improved biological activity over known proteins and/or lower toxicity and/or increased stability.

L'invention concerne le domaine de la santé humaine et animale, et plus particulièrement les usages pharmacologiques d'analogues ou de mutants de l'interféron-tau (IFN-.tau.) qui diffère de l'IFN-.tau. natif, du fait des substitutions d'acides aminés proches de la terminaison amino de la molécule d'IFN-.tau. qui assure une activité biologique améliorée. Les mutants d'IFN-.tau. décrits possèdent une faible toxicité, présentent la même activité antivirale que le très efficace IFN-alpha ou une activité légèrement réduite par rapport à celui-ci, et développent une activité antiproliférative accrue par rapport à l'activité de l'IFN-tau natif, ce qui les rend utiles pour traiter les infections virales, le cancer, et les maladies du système immunitaire notamment les maladies auto-immunes. L'invention concerne également une technique permettant de préparer de nouvelles protéines de recombinaiso, en particulier des interférons, des interleukines, des cytokines, des hormones polypeptides et d'autres produits biopharmaceutiques possédant une activité biologique améliorée sur les protéines connues, et/ou une faible toxicité, et/ou une stabilité accrue.

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