Detection of doxorubicin-induced apoptosis of leukemic T-lymphocytes by laser tweezers Raman spectroscopy

Tobias J. Moritz, Douglas S. Taylor, Denise M. Krol, John Fritch, James W Chan

Research output: Contribution to journalArticle

44 Scopus citations

Abstract

Laser tweezers Raman spectroscopy (LTRS) was used to acquire the Raman spectra of leukemic T lymphocytes exposed to the chemotherapy drug doxorubicin at different time points over 72 hours. Changes observed in the Raman spectra were dependent on drug exposure time and concentration. The sequence of spectral changes includes an intensity increase in lipid Raman peaks, followed by an intensity increase in DNA Raman peaks, and finally changes in DNA and protein (phenylalanine) Raman vibrations. These Raman signatures are consistent with vesicle formation, cell membrane blebbing, chromatin condensation, and the cytoplasm of dead cells during the different stages of drug-induced apoptosis. These results suggest the potential of LTRS as a real-time single cell tool for monitoring apoptosis, evaluating the efficacy of chemotherapeutic treatments, or pharmaceutical testing.

Original languageEnglish (US)
Pages (from-to)1138-1147
Number of pages10
JournalBiomedical Optics Express
Volume1
Issue number4
DOIs
StatePublished - Nov 1 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Biotechnology

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