Ratiometric Raman imaging reveals the new anti-cancer potential of lipid targeting drugs

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Abstract

De novo lipid synthesis is upregulated in cancer cells and inhibiting these pathways has displayed anti-tumour activity. Here we use Raman spectroscopy, focusing solely on high wavenumber spectra, to detect changes in lipid composition in single cells in response to drugs targeting de novo lipid synthesis. Unexpectedly, the beta - blocker propranolol showed selectively towards cancerous PC3 compared to non-cancerous PNT2 prostate cells, demonstrating the potential of this approach to identify new anti-cancer drug leads. A unique and simple ratiometric approach for intracellular lipid investigation is reported using statistical analysis to create phenotypic ‘barcodes’, a globally applicable strategy for Raman drug-cell studies. High wavenumber spectral analysis is compatible with low cost glass substrates, easily translatable into the cytological work stream. The analytical strength of this technique could have a significant impact on cancer treatment through vastly improved understanding of cancer cell metabolism, and thus guide drug design and enhance personalised medicine strategies.
Original languageEnglish
Pages (from-to)6935-6943
Number of pages9
JournalChemical Science
Volume9
Issue number34
Early online date31 Jul 2018
DOIs
Publication statusPublished - 14 Sep 2018

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Keywords

  • Raman spectroscopy
  • cancer
  • lipid metabolism
  • ratiometric analysis

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