Lipidomic profiling of tryptophan hydroxylase 2 knockout mice reveals novel lipid biomarkers associated with serotonin deficiency

Analytical and Bioanalytical Chemistry
Rui WengHuwei Liu

Abstract

Serotonin is an important neurotransmitter that regulates a wide range of physiological, neuropsychological, and behavioral processes. Consequently, serotonin deficiency is involved in a wide variety of neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease, schizophrenia, and depression. The pathophysiological mechanisms underlying serotonin deficiency, particularly from a lipidomics perspective, remain poorly understood. This study therefore aimed to identify novel lipid biomarkers associated with serotonin deficiency by lipidomic profiling of tryptophan hydroxylase 2 knockout (Tph2-/-) mice. Using a high-throughput normal-/reversed-phase two-dimensional liquid chromatography-quadrupole time-of-flight mass spectrometry (NP/RP 2D LC-QToF-MS) method, 59 lipid biomarkers encompassing glycerophospholipids (glycerophosphocholines, lysoglycerophosphocholines, glycerophosphoethanolamines, lysoglycerophosphoethanolamines glycerophosphoinositols, and lysoglycerophosphoinositols), sphingolipids (sphingomyelins, ceramides, galactosylceramides, glucosylceramides, and lactosylceramides) and free fatty acids were identified. Systemic oxidative stress in the Tph2-/- mice was significantly elevated, and a correspondin...Continue Reading

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Citations

Oct 31, 2018·Frontiers in Psychiatry·Andreas WaltherClemens Kirschbaum
May 11, 2021·Frontiers in Cellular and Infection Microbiology·Yiying HuangLing Long

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