Dataset Information

Analysis of Acrylamide in Dried Blood Spots of Lung Cancer Patients by Ultrahigh-Performance Liquid Chromatography Tandem Mass Spectrometry.

ABSTRACT: Acrylamide (AA) is a carcinogenic substance found in food, cigarette smoke and in an environment exposed to acrylamide. This study aims to analyze AA levels in dried blood spot (DBS) samples of lung cancer patients with smoking record, without smoking record, and also in the negative blank. Analysis of AA levels was determined by liquid chromatography tandem mass spectrometry (LC-MS/MS) and DBS extraction using protein precipitation techniques. Mass detection was done using positive electron spray ionization (ESI) and multiple reaction monitoring (MRM) type with m/z values of 71.99?>?55.23 for acrylamide and m/z 260.16?>?116.04 for propranolol as the internal standard. AA levels in lung cancer patients with smoking record is in the range of 4.670??g/mL to 11.986??g/mL. AA levels in lung cancer patients without smoking record is in the range of 2.041??g/mL to 12.702??g/mL. Data on AA levels on negative blanks is in the range of 2.72??g/mL to 3.51??g/mL. The results of the independent sample t-test (p > 0.05) showed that AA levels in patients with smoking record and those without smoking record did not differ significantly. Then, the Mann-Whitney test was performed between the lung cancer group and the negative blank group and a significant difference was found between the two groups (p < 0.05).

SUBMITTER: Harahap Y

PROVIDER: S-EPMC7254088 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Analysis of Acrylamide in Dried Blood Spots of Lung Cancer Patients by Ultrahigh-Performance Liquid Chromatography Tandem Mass Spectrometry.

Harahap Yahdiana Y Elysia Camilla C Starlin Zenshiny Z Jayusman Achmad Mulawarman AM

International journal of analytical chemistry 20200519

Acrylamide (AA) is a carcinogenic substance found in food, cigarette smoke and in an environment exposed to acrylamide. This study aims to analyze AA levels in dried blood spot (DBS) samples of lung cancer patients with smoking record, without smoking record, and also in the negative blank. Analysis of AA levels was determined by liquid chromatography tandem mass spectrometry (LC-MS/MS) and DBS extraction using protein precipitation techniques. Mass detection was done using positive electron spr ...[more]

PMID: 32508924

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Project description:Improvements in sample preparation, separation, and mass spectrometry continue to expand the coverage in LC-MS based lipidomics. While longer columns packed with smaller particles in theory give higher separation performance compared to shorter columns, the implementation of this technology above commercial limits has been sparse due to difficulties in packing long columns and successfully operating instruments at ultrahigh pressures. In this work, a liquid chromatograph that operates up to 35 kpsi was investigated for the separation and identification of lipid species from human plasma. Capillary columns between 15-50 cm long were packed with 1.7 µm BEH C18 particles and evaluated for their ability to separate lipid isomers and complex lipid extracts from human plasma. Putative lipid class identifications were assigned using accurate mass and relative retention time data of the eluting peaks. Our findings indicate that longer columns packed and operated at 35 kpsi outperform shorter columns packed and run at lower pressures in terms of peak capacity and numbers of features identified. Packing columns with relatively high concentration slurries (200 mg/mL) while sonicating the column resulted in 6-34% increase in peak capacity for 50 cm columns compared to lower slurry concentrations and no sonication. For a given analysis time, 50 cm long columns operated at 35 kpsi provided a 20-95% increase in chromatographic peak capacity compared with 15 cm columns operated at 15 kpsi. Analysis times up to 4 h were evaluated, generating peak capacities up to 410 ± 5 (n = 3, measured at 4σ) and identifying 480 ± 85 lipids (n = 2). Importantly, the results also show a correlation between the peak capacity and the number of lipids identified from a human plasma extract. This correlation indicates that ionization suppression is a limiting factor in obtaining sufficient signal for identification by mass spectrometry. The result also shows that the higher resolution obtained by shallow gradients overcomes possible signal reduction due to broader, more dilute peaks in long gradients for improving detection of lipids in LC-MS. Lastly, longer columns operated at shallow gradients allowed for the best separation of both regional and geometrical isomers. These results demonstrate a system that enables the advantages of using longer columns packed and run at ultrahigh pressure for improving lipid separations and lipidome coverage.

Dataset Information

Analysis of Acrylamide in Dried Blood Spots of Lung Cancer Patients by Ultrahigh-Performance Liquid Chromatography Tandem Mass Spectrometry.

Publications

Analysis of Acrylamide in Dried Blood Spots of Lung Cancer Patients by Ultrahigh-Performance Liquid Chromatography Tandem Mass Spectrometry.

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