Phosphorothioate oligonucleotides separation in ion-pairing reversed-phase liquid chromatography: effect of temperature.

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    • Source:
      Publisher: Elsevier Country of Publication: Netherlands NLM ID: 9318488 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3778 (Electronic) Linking ISSN: 00219673 NLM ISO Abbreviation: J Chromatogr A Subsets: MEDLINE
    • Publication Information:
      Original Publication: Amsterdam ; New York : Elsevier, 1993-
    • Subject Terms:
    • Abstract:
      Analysis of diastereomers of phosphorothioate oligonucleotides in ion-pairing reversed-phase liquid chromatography is affected not only by the character and concentration of ion-pairing system, but also by the separation temperature. In this work, eight ion-pairing systems at two concentrations buffered with acetic acid were used with octadecyl column to investigate the effects of temperature (in the range from 20 °C to 90 °C) on retention, diastereomeric separation, resolution of mers of different length and resolution of oligonucleotides with different number of phosphorothioate linkages. It was observed that elevated temperature suppresses the diastereomeric separation and oligonucleotide peaks become narrower. This improves the resolution of n and n-1 mers at elevated temperature. Plots of ln k (k = retention factor) versus reciprocal absolute temperature show that for 100 mM ion-pairing systems the increase in temperature does not lead to simple decrease in oligonucleotides retention as generally observed in reversed-phase liquid chromatography. The aim of this work is to improve chromatographic method for analysis of phosphorothioate oligonucleotides.
      Competing Interests: Declaration of Competing Interest The authors declared no conflict of interest.
      (Copyright © 2022 Elsevier B.V. All rights reserved.)
    • Contributed Indexing:
      Keywords: Diastereomeric separation; Ion-pairing reversed-phase chromatography; Phosphorothioate oligonucleotides; Resolution; Temperature
    • Accession Number:
      0 (Phosphorothioate Oligonucleotides)
    • Publication Date:
      Date Created: 20220916 Date Completed: 20220923 Latest Revision: 20220923
    • Publication Date:
      20240829
    • Accession Number:
      10.1016/j.chroma.2022.463473
    • Accession Number:
      36113338