title: Determination of the lipid peroxidation product (E)-4-hydroxy-2-nonenal in clinical samples by gas chromatography--negative-ion chemical ionisation mass spectrometry of the O-pentafluorobenzyl oxime.
abstract: (E)-4-Hydroxy-2-nonenal (HNE) is a highly reactive product of the free radical-stimulated lipid peroxidation of phospholipid-bound arachidonic acid in cellular membranes. We describe a sensitive and specific method for the determination of HNE in clinical samples. The method is based on the formation of the O-pentafluorobenzyl (O-PFB) oxime derivative of HNE, which is then extracted and cleaned up by solid-phase extraction. The HNE O-PFB oxime is then analysed without further derivatisation by capillary column gas chromatography-negative ion chemical ionisation mass spectrometry (GC-NICI-MS) using selected-ion monitoring. Concentrations down to the pmol range were achieved using deuterated HNE as an internal standard. The method was used to determine HNE in the cerebrospinal fluid and plasma of patients with Parkinson's disease, the plasma of patients with HIV-1 infection and AIDS and in inflamed mucosal biopsy specimens from patients with inflammatory bowel disease.
authors.affiliation: The Australian National University, The John Curtin School of Medical Research, The Canberra Hospital, Garran.
authors.forename: M L
authors.initials: ML
authors.lastname: Selley
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000097:blood; D000328:Adult; D000368:Aged; D000447:Aldehydes / Q000032:analysis* / Q000097:blood / Q000134:cerebrospinal fluid; D002849:Chromatography, Gas; D005260:Female; D006801:Humans; D006898:Hydroxylamines; D007202:Indicators and Reagents; D015212:Inflammatory Bowel Diseases / Q000378:metabolism; D007413:Intestinal Mucosa / Q000737:chemistry; D015227:Lipid Peroxidation; D008297:Male; D013058:Mass Spectrometry; D008875:Middle Aged; D010300:Parkinson Disease / Q000097:blood / Q000134:cerebrospinal fluid; D005466:Fluorocarbons
chemical_list: D000447:Aldehydes; D006898:Hydroxylamines; D007202:Indicators and Reagents; C010277:Florox Reagent; D005466:Fluorocarbons; C027576:4-hydroxy-2-nonenal