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    • 4. 发明公开
    • METHODS AND COMPOSITIONS FOR THE EXTRACTION AND AMPLIFICATION OF NUCLEIC ACID FROM A SAMPLE
    • 从样品中提取和扩增核酸的方法和组合物
    • EP3260556A1
    • 2017-12-27
    • EP17180962.7
    • 2007-05-30
    • Sequenom, Inc.
    • HOYAL-WRIGHTSON, Carolyn R.BRAUN, AndreasSCHMIDT, Karsten E.
    • C12Q1/68C12P19/34C12N15/10
    • C12N15/1006C12N15/1003C12N15/1013C12Q1/6806C12Q1/686
    • The present invention relates to a method for extracting low molecular weight nucleic acid from a sample comprising a mixture of low molecular weight nucleic acid and high molecular weight nucleic acid, which comprises:
      (a) mixing the sample, a salt and a solid support capable of reversibly binding nucleic acid, thereby forming a first binding solution, wherein the salt is present at a concentration at which the high molecular weight nucleic acid selectively adsorbs to the solid support;
      (b) separating the solid support from the first binding solution, thereby yielding a fraction separated from the solid support;
      (c) mixing the fraction separated from the solid support in (b) with additional salt, whereby the salt is present at a higher concentration than that of the first binding solution in (a);
      (d) introducing additional solid support to the mixture in (c), thereby forming a second binding solution, wherein the low molecular weight nucleic selectively adsorbs to the additional solid support; and
      (e) separating the additional solid support from the second binding solution, thereby extracting low molecular weight nucleic acid from the sample, wherein the low molecular weight nucleic acid comprises less than 1200 base pairs and the high molecular weight nucleic acid comprises 1200 or more base pairs.
    • 本发明涉及从包含低分子量核酸和高分子量核酸的混合物的样品中提取低分子量核酸的方法,其包括:(a)将样品,盐和固体载体 从而形成第一结合溶液,其中所述盐以所述高分子量核酸选择性吸附至所述固体支持物的浓度存在; (b)从第一结合溶液中分离固体载体,由此产生与固体载体分离的部分; (c)将(b)中与固体载体分离的部分与另外的盐混合,由此所述盐以比(a)中的第一结合溶液更高的浓度存在; (d)将额外的固体载体引入(c)中的混合物中,由此形成第二结合溶液,其中低分子量核酸选择性吸附到另外的固体载体上; 和(e)从第二种结合溶液中分离另外的固体支持物,从而从样品中提取低分子量核酸,其中低分子量核酸包含少于1200个碱基对,高分子量核酸包含1200个或更多个 碱基对。