Enhanced cellular uptake efficiency of DCM probes or SN38 conjugating with phenylboronic acids

Qiumeng Zhang, Rui Che, Wei Lu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

High-level of sialic acid (SA) expression on the surface of cancer cells is observed extremely common. Phenylboronic acids (PBAs) have a high affinity with SA. The cellular uptake efficiency could be enhanced by the strategy of introducing PBA fragments to the compounds. In this work, we synthesized five new probes with the Dicyanomethylene-4H-pyran (DCM) fluorophore, three of them conjugated with different phenylboronic acid fragments. By cellular uptake experiments, DLCB and DLAB showed enhanced cellular uptake abilities compared with DLN and DLO. These two effective phenylboronic acid fragments were then conjugated with SN-38 and the conjugates showed enhanced cellular uptake abilities by 3-fold or 7-fold compared with irinotecan. In summary, the strategy of introducing 4-carboxyphenylboronic acid and 3-amino-benzoxaborole groups shows great potential in drug delivery system. Moreover, the released linkers between boric acid and drugs deserve further studies.

Original languageEnglish
Article number115377
JournalBioorganic and Medicinal Chemistry
Volume28
Issue number7
DOIs
StatePublished - 1 Apr 2020

Keywords

  • Cellular uptake
  • Phenylboronic acid
  • Probe
  • SN38
  • Sialic acid

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