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A Novel Fluorescent Probe Diphenyl-1-pyrenylphosphine to Follow Lipid Peroxidation in Cell Membranes

Overview
Journal FEBS Lett
Specialty Biochemistry
Date 2000 Jun 6
PMID 10838073
Citations 49
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Abstract

Diphenyl-1-pyrenylphosphine (DPPP) was tested whether it could be used as a fluorescent probe to monitor lipid peroxidation in cell membranes. DPPP reacted with organic hydroperoxides and hydrogen peroxide stoichiometrically to give DPPP oxide (DPPP = O). DPPP incorporated into phosphatidylcholine liposomal membranes and polymorphonuclear leukocytes (PMNs) reacted with methyl linoleate hydroperoxide rapidly but not with hydrogen peroxide nor with tert-butyl hydroperoxide. This novel method revealed that lipid peroxidation proceeded within membranes of PMNs stimulated with phorbol 12-myristate 13-acetate, which is known to produce several kinds of free radicals. It was found that DPPP is a suitable fluorescent probe to monitor lipid peroxidation within cell membranes specifically.

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