TY - JOUR
T1 - Structural mass spectrometry analysis of lipid changes in a Drosophila epilepsy model brain
AU - Kliman, Michal
AU - Vijayakrishnan, Niranjana
AU - Wang, Lily
AU - Tapp, John T.
AU - Broadie, Kendal
AU - McLean, John A.
PY - 2010
Y1 - 2010
N2 - Phosphatidylethanolamine (PtdEtn) is one of the most abundant phospholipids in many animal cell types. The Drosophila easily shocked (eas2) mutant, used as an epilepsy model, is null for the PtdEtn biosynthetic enzyme, ethanolamine kinase. This mutant displays bang sensitive paralysis, and was previously shown to have decreased levels of PtdEtn. We have developed a highly selective and sensitive measurement strategy using ion mobility-mass spectrometry for the relative quantitation of intact phospholipid species directly from isolated brain tissue of eas mutants. Over 1200 distinct lipid signals are observed and within this population 38, including PtdEtn, phosphatidylinositol (PtdIns) and phosphatidylcholine (PtdCho) species are identified to have changed significantly (p < 0.03) between mutant and control tissue. This method has revealed for the first time the structural complexity and biosynthetic interconnectedness of specific PtdEtn and PtdIns lipid species within tissue, and provides great molecular detail compared to traditionally used detection techniques.
AB - Phosphatidylethanolamine (PtdEtn) is one of the most abundant phospholipids in many animal cell types. The Drosophila easily shocked (eas2) mutant, used as an epilepsy model, is null for the PtdEtn biosynthetic enzyme, ethanolamine kinase. This mutant displays bang sensitive paralysis, and was previously shown to have decreased levels of PtdEtn. We have developed a highly selective and sensitive measurement strategy using ion mobility-mass spectrometry for the relative quantitation of intact phospholipid species directly from isolated brain tissue of eas mutants. Over 1200 distinct lipid signals are observed and within this population 38, including PtdEtn, phosphatidylinositol (PtdIns) and phosphatidylcholine (PtdCho) species are identified to have changed significantly (p < 0.03) between mutant and control tissue. This method has revealed for the first time the structural complexity and biosynthetic interconnectedness of specific PtdEtn and PtdIns lipid species within tissue, and provides great molecular detail compared to traditionally used detection techniques.
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U2 - 10.1039/b927494d
DO - 10.1039/b927494d
M3 - Article
C2 - 20379606
AN - SCOPUS:77952521680
VL - 6
SP - 958
EP - 966
JO - Molecular BioSystems
JF - Molecular BioSystems
SN - 1742-206X
IS - 6
ER -