Histidine-tagged shiga toxins, toxoids, and protein fusions...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/31 (2006.01) A61K 39/40 (2006.01) A61K 48/00 (2006.01) C07K 14/245 (2006.01) C07K 14/25 (2006.01) C07K 16/12 (2006.01) C12N 15/62 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2265887

The present invention describes the isolation and purification of biologically and immunologically active histidine-tagged Shiga toxins (His-tagged), a toxin associated with HC and the potentially life-threatening sequela HUS transmitted by strains of pathogenic bacteria. The present invention describes how his-tagging greatly simplifies and expedites purifying Shiga toxins, and describes an improved method for such purification. One aspect of the invention is obtaining and using Shiga toxoids that are immunoreactive but not toxic. Another aspect of the invention is obtaining and using fusion proteins of His-tagged Shiga toxins or toxoids. Yet another aspect of the invention is obtaining and using antibodies to His-gagged Shiga toxins, toxoids, or Shiga toxin/toxoid fusion proteins.

L'invention concerne l'isolement et la purification de toxines Shiga à activité biologique et immunologique, marquées par l'histine, une toxine associée à la colite hémorragique et à des séquelles du syndrome hémolytique et urémique potentiellement mortelles transmis par des souches de bactéries pathogènes. L'invention décrit comment ce marquage par l'histidine simplifie et accélère grandement la purification des toxines Shiga ainsi qu'un procédé amélioré pour effectuer ladite purification. L'un des aspects de l'invention porte sur l'obtention et l'utilisation de toxoïdes Shiga immunoréactifs mais non toxiques. Un autre aspect de l'invention porte sur la production et l'utilisation de protéines fusionnées à des toxines ou toxoïdes Shiga marqués par l'histine. L'invention porte en outre sur la production et sur l'utilisation d'anticorps anti toxines ou toxoïdes Shiga marqués par l'histine ou anti protéines fusionnées à des toxines ou toxoïdes Shiga.

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