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Aptamers as Reversible Sorting Ligands for Preparation of Cells in Their Native State.
Cell Chemical Biology ( IF 6.6 ) Pub Date : 2019-12-23 , DOI: 10.1016/j.chembiol.2019.12.004
Bethany Powell Gray 1 , Martin D Requena 1 , Michael D Nichols 2 , Bruce A Sullenger 3
Affiliation  

Although antibodies are routinely used to label and isolate a desired cell type from a more complex mixture of cells, via either fluorescence-activated cell sorting (FACS) or magnetic-activated cell sorting (MACS), such antibody labeling is not easily reversible. We describe an FACS and MACS compatible method to reversibly label and purify cells using aptamers. Magnetic beads loaded with the epidermal growth factor receptor (EGFR)-binding antagonistic aptamer E07 specifically isolated EGFR-expressing cells, and pure, label-free cells were recovered via treatment with an "antidote" oligonucleotide complementary to the aptamer. Additionally, while FACS sorting cells with E07 or EGFR antibody yielded EGFR(+) cells with impeded EGFR signaling, stripping off the aptamer via antidote treatment restored receptor function, returning cells to their native state, which was not possible with the antibody. The ability to reversibly label or isolate cells without compromising their function is a valuable, versatile tool with important implications for both the laboratory and clinic.

中文翻译:

适体作为可逆分选配体,用于制备天然状态的细胞。

尽管抗体通常用于通过荧光激活细胞分选(FACS)或磁激活细胞分选(MACS)从更复杂的细胞混合物中标记和分离所需的细胞类型,但这种抗体标记并不容易逆转。我们描述了FACS和MACS兼容的方法,以使用适体可逆地标记和纯化细胞。通过用与适体互补的“解毒剂”寡核苷酸进行处理,回收了载有表皮生长因子受体(EGFR)结合拮抗适体E07的磁珠,专门分离了表达EGFR的细胞,以及纯净,无标记的细胞。此外,虽然使用E07或EGFR抗体的FACS分选细胞产生的EGFR(+)细胞具有受阻的EGFR信号传导,但通过解毒剂处理剥离适体可恢复受体功能,使细胞恢复至天然状态,这是抗体无法实现的。可逆地标记或分离细胞而不损害其功能的能力是一种有价值的多功能工具,对实验室和临床都具有重要意义。
更新日期:2019-12-25
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