Methods for Imaging and Detecting Modification of Proteins by Reactive Lipid Species
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Biology
General Medicine
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Products of lipid peroxidation are generated in a wide range of pathologies associated with oxidative stress and inflammation. Many oxidized lipids contain reactive functional groups that can modify proteins, change their structure and function, and affect cell signaling. However, intracellular localization and protein adducts of reactive lipids have been difficult to detect, and the methods of detection rely largely on antibodies raised against specific lipid-protein adducts. As an alternative approach to monitoring oxidized lipids in cultured cells, we have tagged the lipid peroxidation substrate arachidonic acid and an electrophilic lipid, 15-deoxy-Delta(12,14)-prostaglandin-J2 (15d-PGJ2), with either biotin or the fluorophore BODIPY. Tagged arachidonic acid can be used in combination with conditions of oxidant stress or inflammation to assess the subcellular localization and protein modification by oxidized lipids generated in situ. Furthermore, we show that reactive lipid oxidation products such as 15d-PGJ2 can also be labeled and used in fluorescence and Western blotting applications. This article describes the synthesis, purification, and selected application of these tagged lipids in vitro.
Porter N, Xu L, Pratt D Chemistry (Basel). 2022; 2(2):390-417.
PMID: 35372835 PMC: 8976181. DOI: 10.3390/chemistry2020025.
Fuloria S, Subramaniyan V, Karupiah S, Kumari U, Sathasivam K, Unnikrishnan Meenakshi D Antioxidants (Basel). 2020; 9(11).
PMID: 33147856 PMC: 7692604. DOI: 10.3390/antiox9111075.
Karuppagounder S, Alin L, Chen Y, Brand D, Bourassa M, Dietrich K Ann Neurol. 2018; 84(6):854-872.
PMID: 30294906 PMC: 6519209. DOI: 10.1002/ana.25356.
Redox Signaling by Reactive Electrophiles and Oxidants.
Parvez S, Long M, Poganik J, Aye Y Chem Rev. 2018; 118(18):8798-8888.
PMID: 30148624 PMC: 6158072. DOI: 10.1021/acs.chemrev.7b00698.
Mitochondrial health, the epigenome and healthspan.
Aon M, Cortassa S, Juhaszova M, Sollott S Clin Sci (Lond). 2016; 130(15):1285-305.
PMID: 27358026 PMC: 5066813. DOI: 10.1042/CS20160002.