title: The development of plasma pseudotargeted GC-MS metabolic profiling and its application in bladder cancer.
abstract: Bladder cancer (BC) is a fatal malignancy with considerable mortality. BC urinary metabolomics has been extensively investigated for biomarker discovery, but few BC blood metabolomic studies have been performed. Hence, a plasma pseudotargeted metabolomic method based on gas chromatography-mass spectrometry with selected ion monitoring (GC-MS-SIM) was developed to study metabolic alterations in BC. The analytical performance of the developed method was compared with that of a nontargeted method. The relative standard deviation (RSD) values of 89 and 70.7 % of the peaks obtained using the pseudotargeted and nontargeted methods, respectively, were less than 20 %. The Pearson correlations of 90.7 and 78.3 % of the peaks obtained using the pseudotargeted and nontargeted methods, respectively, exceeded 0.90 in the linearity evaluation. Compared with the nontargeted method, the signal-to-noise ratios (S/N) of 97.9 and 69.3 % of the peaks increased two- and fivefold, respectively. The developed method was fully validated, with good precision, recovery, and stability of the trimethylsilyl (TMS) derivatives. The method was applied to investigate BC. Significant increases in the contents of metabolites involved in, for example, the pentose phosphate pathway (PPP) and nucleotide and fatty acid synthesis were found in the high-grade (HG) BC group compared to the healthy control (HC) group. These differences imply that the activated PPP may regulate BC cell proliferation by promoting lipid and nucleotide biosynthesis and the detoxification of reactive oxygen species (ROS). These results illustrate that the plasma pseudotargeted method is a powerful tool for metabolic profiling. Graphical abstract The plasma pseudotargeted metabolic profiling suggested the metabolic alterations in bladder cancer (BC) and the significantly differential metabolites for BC discrimination.
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Urology, Shanghai Changhai Hospital, Secondary Military Medical University, Shanghai, 200433, China.
authors.forename: Ruixiang
authors.initials: R
authors.lastname: Song
authors.affiliation: Department of Urology, Shanghai Changhai Hospital, Secondary Military Medical University, Shanghai, 200433, China.
authors.forename: Zhensheng
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China. luxin001@dicp.ac.cn.
authors.forename: Xin
authors.initials: X
authors.lastname: Lu
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China.
authors.forename: Zhongda
authors.initials: Z
authors.lastname: Zeng
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China.
authors.forename: Chunxiu
authors.initials: C
authors.lastname: Hu
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Urology, Shanghai Changhai Hospital, Secondary Military Medical University, Shanghai, 200433, China.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Hou
authors.affiliation: Department of Urology, Shanghai Changhai Hospital, Secondary Military Medical University, Shanghai, 200433, China.
authors.forename: Yinghao
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Urology, Shanghai Changhai Hospital, Secondary Military Medical University, Shanghai, 200433, China. xuchuanliang@medmail.com.cn.
authors.forename: Chuanliang
authors.initials: C
authors.lastname: Xu
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, China.
authors.forename: Guowang
authors.initials: G
authors.lastname: Xu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D008297:Male; D055442:Metabolome; D055432:Metabolomics / Q000379:methods*; D008875:Middle Aged; D012680:Sensitivity and Specificity; D001749:Urinary Bladder Neoplasms / Q000097:blood* / Q000378:metabolism
keywords: Bladder cancer; Gas chromatography–mass spectrometry; Metabolic profiling; Metabolomics; Plasma; Pseudotargeted