A pH-Responsive Glycyrrhetinic-Acid-Modified Small-Molecule Conjugate for NIR Imaging of Hepatocellular Carcinoma (HCC)

Hardev Singh, Ja Yun Lim, Amit Sharma, Dae Wui Yoon, Ji Hyeon Kim, Zhigang Yang, Junle Qu, Jinkwan Kim, Seung Gwan Lee, Jong Seung Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We report a glycyrrhetinic-acid (GA)-decorated small-molecule conjugate for pH-triggered near-infrared (NIR) fluorescence imaging of hepatocellular carcinoma (HCC). Our in vitro studies demonstrated that the conjugate, referred to as NIR-GA, was efficiently taken up by liver cancer cell lines such as HepG2 and Huh7 through an endocytic pathway mediated by GA receptors. As suggested by co-localization studies, NIR-GA mainly localized in the lysosome, where the acidic pH results in the activation of the fluorescent dye through H + -triggered spirolactam ring opening to give strong fluorescence in the NIR region.

Original languageEnglish
Pages (from-to)614-620
Number of pages7
JournalChemBioChem
Volume20
Issue number4
DOIs
Publication statusPublished - 2019 Feb 15

Keywords

  • fluorescent probes
  • glycyrrhetinic acid
  • hepatocellular carcinoma
  • imaging agents
  • natural products

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Organic Chemistry

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