Stabilization of polynucleotide complexes

C - Chemistry – Metallurgy – 12 – N

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Details

C12N 15/87 (2006.01) A61K 9/127 (2006.01) A61K 9/19 (2006.01) A61K 31/70 (2006.01) A61K 35/12 (2006.01) A61K 47/26 (2006.01) A61K 47/48 (2006.01) A61K 48/00 (2006.01)

Patent

CA 2223921

Polynucleotide complexes are stabilized by adding a cryoprotectant compound and lyophilizing the resulting formulation. Cryoprotectant compounds comprise carbohydrates, preferably lactose and sucrose, but also glucose, maltodextrins, mannitol, sorbitol, trehalose, and others. Betaines prolines, and other amino acids may also be useful. Preferably, DNA complexes are cryoprotected with lactose at concentrations of about 1.25 % to about 10 % (w/vol). Conventional buffers may also be added to the mixture. The lyophilized formulations may be stored for extended periods of time and then rehydrated prior to use.

Des complexes de polynucléotides sont stabilisés par l'addition d'un composé cryoprotecteur et la lyophilisation de la formulation obtenue. Les composés cryoprotecteurs comprennent des glucides, de préférence le lactose et le saccharose, mais aussi le glucose, des maltodextrines, le mannitol, le sorbitol, le tréhalose et d'autres. Les bétaïnes, les prolines et d'autres acides aminés peuvent aussi être utiles. De préférence, les complexes d'ADN sont cryoprotégés au moyen de lactose à des concentrations d'environ 1,25 à environ 10 % (en poids par volume). Des tampons classiques peuvent aussi être ajoutés au mélange. Les formulations lyophilisées peuvent être stockées pendant de longues périodes puis réhydratées avant l'emploi.

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