In the examples set forth herein, nucleic acid extraction materials are capable of selectively extracting cell free nucleic acids, including cell free DNA, directly from whole blood samples or plasma. Also included are methods of making and using the nucleic acid extraction materials. One example of a nucleic acid extraction material includes a substrate. This example of the nucleic acid extraction material also includes a polycation bonded to at least a portion of a surface of the substrate. In this example, the polycation consists of a polymer of a quaternized monomer selected from the group consisting of a quaternized 1-vinylimidazole monomer and a quaternized dimethylaminoethyl methacrylate monomer, or a copolymer of a neutral monomer and the quaternized monomer.
在本文所述的例子中,核酸提取材料能够选择性地直接从全血或血浆样本中提取游离细胞核酸,包括游离细胞 DNA。此外,还包括制造和使用核酸提取材料的方法。核酸提取材料的一个例子包括一种基质。本例核酸提取材料还包括至少与基底表面的一部分结合的聚阳离子。在本例中,聚阳离子由季
铵化单体的聚合物组成,该单体选自由季
铵化
1-乙烯基咪唑单体和季
铵化甲基
丙烯酸二甲胺基乙酯单体组成的组,或者由中性单体和季
铵化单体的共聚物组成。