title: Increased unsaturation of lipids in cytoplasmic lipid droplets in DAOY cancer cells in response to cisplatin treatment.
abstract: Increases in1H nuclear magnetic resonance spectroscopy (NMR) visible lipids are a well-documented sign of treatment response in cancers. Lipids in cytoplasmic lipid droplets (LDs) are the main contributors to the NMR lipid signals. Two human primitive neuroectodermal tumour cell lines with different sensitivities to cisplatin treatment were studied. Increases in NMR visible saturated and unsaturated lipids in cisplatin treated DAOY cells were associated with the accumulation of LDs prior to DNA fragmentation due to apoptosis. An increase in unsaturated fatty acids (UFAs) was detected in isolated LDs from DAOY cells, in contrast to a slight decrease in UFAs in lipid extracts from whole cells. Oleic acid and linoleic acid were identified as the accumulating UFAs in LDs by heteronuclear single quantum coherence spectroscopy (HSQC).1H NMR lipids in non-responding PFSK-1 cells were unchanged by exposure to 10 μM cisplatin. These findings support the potential of NMR detectable UFAs to serve as a non-invasive marker of tumour cell response to treatment.
authors.affiliation: Cancer Sciences, University of Birmingham, Birmingham, NH UK ; Birmingham Children's Hospital NHS Foundation Trust, Birmingham, NH UK.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Pan
authors.forename: Martin
authors.initials: M
authors.lastname: Wilson
authors.forename: Carmel
authors.initials: C
authors.lastname: McConville
authors.forename: Theodoros N
authors.initials: TN
authors.lastname: Arvanitis
authors.forename: Julian L
authors.initials: JL
authors.lastname: Griffin
authors.forename: Risto A
authors.initials: RA
authors.lastname: Kauppinen
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Peet
keywords: 1H NMR; Cisplatin; Isolation; Lipid droplets