Quantitative analysis of phosphatidylcholines and phosphatidylethanolamines in urine of patients with breast cancer by nanoflow liquid chromatography/ tandem mass spectrometry

Hanna Kim, Hye Kyeong Min, Gu Kong, Myeong Hee Moon

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Phosphatidylcholines (PCs) and phosphatidylethanolamines (PEs) from urine of patients with breast cancer were qualitatively and quantitatively analyzed by nanoflow liquid chromatography-electrospray ionization tandem mass spectrometry (nLC-ESI-MS-MS). Urinary phospholipids (PLs) were extracted from three different categories of patients (non-cancer controls and breast cancer patients before and after surgery) by first lyophilizing only 1 mL of urine sample to enrich PLs. Next, nLC-ESI-MS-MS analysis of intact urinary phospholipids was performed, resulting in structural identification of 21 PCs and 12 PEs, followed by quantitative analysis using a multiple standard addition method. This study demonstrated that nLC-ESI-MS-MS can be powerfully utilized for the study of relative changes in the contents and concentration of urinary PCs and PEs from breast cancer patients: total concentration of PCs and PEs of patient sample increased to (144∈±∈9)% and (171∈±∈11)%, respectively, compared to control sample but they decreased significantly following surgery.

Original languageEnglish
Pages (from-to)1649-1656
Number of pages8
JournalAnalytical and Bioanalytical Chemistry
Issue number6-7
Publication statusPublished - 2009 Mar 1


All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry

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