2026-10-11T02:23:36Z https://www.scidb.cn/oai

10.57760/sciencedb.17046 2024-03-19T11:35:03Z

2024-03-19 Distinctive Lipid Characteristics of Colorectal Cancer Revealed through Non-Targeted Lipidomics Analysis of Tongue Coating doi:10.57760/sciencedb.17046 en Tongue coating was used as a sample in this study.Samples were obtained in the morning on an empty stomach. Prior to tongue coating collection, participants rinsed their mouths with sterile water, then used a sterile cotton swab to collect tongue coating. The cotton swab head was placed into a 1ml cryotube containing sterile water for rinsing, then discarded after. The cryotube was swiftly quenched in liquid nitrogen and then stored at -80℃.Lipidomic analyses utilized an Ultimate 3000 UHPLC system coupled with Q-Exactive Plus mass spectrometer (Thermo Fisher Scientific,USA). A reversed-phase CSH C18 column (2.1 mm × 100 mm, 1.7 μm, Waters) was maintained at 45℃. Samples, re-suspended in 2-isopropanol: acetonitrile: water (30:65:5, v/v/v), were injected (2 μL). In positive ion mode, mobile phase A was acetonitrile: water (60:40, v/v) with 10 mM ammonium formate and 0.1% formic acid, and B was 2-propanol: acetonitrile (90:10, v/v) with 10 mM ammonium formate and 0.1% formic acid. In negative ion mode, A was acetonitrile: water (60:40, v/v) with 10 mM ammonium formate, and B was 2-propanol: acetonitrile (90:10, v/v) with 10 mM ammonium formate. The flow rate was set to 0.4 mL/min with the following gradient: 0 min, 15% B; 2 min, 30% B; 3 min, 48% B; 14.5 min, 82% B; and 15 min, 99% B. The sample temperature was maintained at 10 ℃. Operational parameters: sheath gas pressure 40, auxiliary gas flow 15, sweep gas flow 0, spray voltage 3.2 kV (positive) and -3.5 kV (negative), capillary temperature 320 ℃, Aux gas heater temperature 350 ℃.  Data were acquired in the data-dependent acquisition mode, with each cycle comprising an MS1 at 70,000 resolution and an MS/MS scan at 17,500 resolution (120-1200 m/z range). The normalized collision energy was 20/30/40, and dynamic exclusion was 8 s. Acquisition was conducted in positive and negative ion modes separately. Automatic gain control targets were 1e6 for MS1 and 1e5 for MS/MS. Samples were randomly analyzed, with interspersed quality control (QC) samples analyzed after every 8 samples during lipidomic analysis. Raw data were collected using Xcalibur (V4.1,Thermo Fisher Scientific,USA). colorectal cancer; Tongue coating; lipidomics; Adenoma-Carcinoma Sequence Progression Qubo Chen Fengye Lin Wanhua Li Xiangyu Gu Ying Chen Hairong Su Lu Zhang Wen Zheng Xuan Zeng Xinyi Lu Chuyang Wang Weicheng Chen Beiping Zhang Haiyan Zhang Meng Gong PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset http://www.doi.org/10.1021/acs.jproteome.4c00063 Science Data Bank