Compositions for stabilizing DNA, RNA, and proteins in blood and other biological samples during shipping and storage at ambient temperatures
First Claim
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1. A composition for stable storage of nucleic acid and polypeptide molecules in a biological sample at room temperature, comprising:
- (a) an imidazolium salt comprising;
i) a compound selected from the group consisting of;
1-benzyl-3-hexylimidazolium,1-methyl-3-carboxyethylimidazolium,1-hexyl-3-methylimidazolium,1-decyl-3-methylimidazolium, and1-(2-hydroxyethyl)-3-methylimidazolium; and
ii) a pharmaceutically acceptable anion;
(b) two or all three of;
(i) at least one precipitating agent,(ii) at least one lower alcohol, wherein the lower alcohol is a straight or branched carbon chain alcohol of no more than 8 carbons, and(iii) at least one chaotrope;
(c) a chelating agent, a reducing agent, or a combination thereof;
(d) one or more pH buffers; and
(e) water,wherein the composition is an aqueous solution and the imidazolium salt of (a) is present in the composition at a concentration of about 0.1% to about 10% (w/v).
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Abstract
Compositions and methods are disclosed for substantially liquid, gel, suspension, slurry, semisolid and/or colloid storage of biological samples following admixture with the herein disclosed storage composition, permitting substantial recovery of biological activity following storage without refrigeration. In certain embodiments, unfractionated blood or tissue samples may be stored without refrigeration for weeks, months or years in a form that permits recovery of intact DNA, RNA or protein components following the storage period.
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14 Claims
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1. A composition for stable storage of nucleic acid and polypeptide molecules in a biological sample at room temperature, comprising:
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(a) an imidazolium salt comprising; i) a compound selected from the group consisting of; 1-benzyl-3-hexylimidazolium, 1-methyl-3-carboxyethylimidazolium, 1-hexyl-3-methylimidazolium, 1-decyl-3-methylimidazolium, and 1-(2-hydroxyethyl)-3-methylimidazolium; and ii) a pharmaceutically acceptable anion; (b) two or all three of; (i) at least one precipitating agent, (ii) at least one lower alcohol, wherein the lower alcohol is a straight or branched carbon chain alcohol of no more than 8 carbons, and (iii) at least one chaotrope; (c) a chelating agent, a reducing agent, or a combination thereof; (d) one or more pH buffers; and (e) water, wherein the composition is an aqueous solution and the imidazolium salt of (a) is present in the composition at a concentration of about 0.1% to about 10% (w/v). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification