Bioactive sphingolipid profile in a xenograft mouse model of head and neck squamous cell carcinoma

• Published in: PloS one Vol. 14; no. 4; p. e0215770
• Main Authors: Bai, Aiping, Liu, Xiang, Bielawski, Jacek, Hannun, Yusuf A
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 19.04.2019; Public Library of Science (PLoS)
• Subjects: Animals; Apoptosis; Biochemistry; Biological activity; Biological markers; Biomarkers; Bladder; Bladder cancer; Blood; Blood lipids; Blood plasma; Brain; Brain tumors; Cancer; Cancer therapies; Carcinoma; Carcinoma, Squamous Cell - metabolism; Carcinoma, Squamous Cell - pathology; Cell cycle; Cell Line, Tumor; Ceramide; Ceramides; Ceramides - metabolism; Chromatography; Chromatography, High Pressure Liquid - methods; Disease Models, Animal; EDTA; Head; Head & neck cancer; Head and neck cancer; Head and Neck Neoplasms - metabolism; Head and Neck Neoplasms - pathology; Heart; Humans; Kidneys; Kinases; Laboratory rats; Lipids; Liver; Lungs; Lysophospholipids - metabolism; Mass spectrometry; Medical research; Membrane lipids; Metabolism; Mice, Nude; Molecular biology; Phosphates; Phospholipids; Plant lipids; Proteins; Quantitative analysis; Scientific imaging; Sphinganine; Sphingolipids; Sphingolipids - metabolism; Sphingosine; Sphingosine - analogs & derivatives; Sphingosine - metabolism; Sphingosine 1-phosphate; Spleen; Squamous cell carcinoma; Statistical analysis; Tandem Mass Spectrometry - methods; Therapeutic applications; Tissues; Transplantation, Heterologous; Tumor cells; Tumors; Xenografts; Xenotransplantation; United States > US; South Carolina
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0215770

The purpose of this study was to determine the profile of bioactive sphingolipids in xenograft mouse tissues of head and neck squamous cell carcinoma. We utilized UHPLC-MS/MS to determine the profile of full set of ceramides, sphingosine, and sphingosine 1-phosphate in this xenograft mouse model. The tissues isolated and investigated were from brain, lung, heart, liver, spleen, kidney, bladder, tumors and blood. With the exception of equal volume of blood plasma (100ul), all tissues were studied with the same amount of protein (800ug). Results demonstrated that brain contained the highest level of ceramide and kidney had the highest level of sphingosine, whereas sphingosine 1-phosphate and dihydrosphingosine 1-phosphate were heavily presented in the blood. Brain also comprised the highest level of phospholipids. As for the species, several ceramides, usually present in very low amounts in cultured tumor cells, showed relatively high levels in certain tissues. This study highlights levels of bioactive sphingolipids profiles in xenograft mouse model of head and neck squamous cell carcinoma, and provides resources to investigate potential therapeutic targets and biomarkers that target bioactive sphingolipids metabolism pathways.