tx9b00181_si_001.pdf (2.02 MB)
Quantitation of Lipid Peroxidation Product DNA Adducts in Human Prostate by Tandem Mass Spectrometry: A Method That Mitigates Artifacts
journal contribution
posted on 2019-08-16, 15:44 authored by Haoqing Chen, Sesha Krishnamachari, Jingshu Guo, Lihua Yao, Paari Murugan, Christopher J. Weight, Robert J. TureskyReactive oxygen species
(ROS) and chronic inflammation contribute
to DNA damage of many organs, including the prostate. ROS cause oxidative
damage to biomolecules, such as lipids, proteins, and nucleic acids,
resulting in the formation of toxic and mutagenic intermediates. Lipid
peroxidation (LPO) products covalently adduct to DNA and can lead
to mutations. The levels of LPO DNA adducts reported in humans range
widely. However, a large proportion of the DNA adducts may be attributed
to artifact formation during the steps of isolation and nuclease digestion
of DNA. We established a method that mitigates artifacts for most
LPO adducts during the processing of DNA. We have applied this methodology
to measure LPO DNA adducts in the genome of prostate cancer patients,
employing ultrahigh-performance liquid chromatography electrospray
ionization ion trap multistage mass spectrometry. Our preliminary
data show that DNA adducts of acrolein, 6-hydroxy-1,N2-propano-2′-deoxyguanosine (6-OH-PdG) and 8-hydroxy-1,N2-propano-2′-deoxyguanosine (8-OH-PdG)
(4–20 adducts per 107 nucleotides) are more prominent
than etheno (ε) adducts (<0.5 adducts per 108 nucleotides).
This analytical methodology will be used to examine the correlation
between oxidative stress, inflammation, and LPO adduct levels in patients
with benign prostatic hyperplasia and prostate cancer.
History
Usage metrics
Categories
Keywords
10 8 nucleotidesLPO DNA adductschromatography electrospray ionization ion trapMitigates Artifacts Reactive oxygen speciesproducts covalently adductTandem Mass SpectrometryDNA adductsROS cause oxidative damagemeasure LPO DNA adductsLPO adduct levelsLipid Peroxidation Product DNA Adductsprostate cancer patients10 7 nucleotides
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC