title: Tissue concentrations of platelet-activating factor in colorectal carcinoma: inverse relationships with Dukes' stage of patients.
abstract: The lipid mediator platelet-activating factor (PAF) plays a role in cancer. We investigated its presence in human colon carcinoma by assessing the levels of tissue phospholipase A(2) (PLA(2), the key enzyme in the generation of the lyso-PAF precursor), lyso-PAF, PAF and acetylhydrolase activity (AHA, the key enzyme in PAF degradation) in colorectal cancer patients and by correlating them with Dukes' classification. The results highlighted that the tumour tissues of Dukes' A and B patients had significantly higher PLA(2), lyso-PAF, PAF and AHA levels as compared with nontumour tissues. Dukes' C patients had higher PLA(2), lyso-PAF and AHA levels but unchanged PAF. Dukes' D patients had higher AHA levels but unchanged PLA(2), lyso-PAF and PAF. A pathophysiological role for PAF is suggested in human colon carcinoma.
authors.affiliation: UMR CNRS 6101, Laboratoire d'Immunologie, Faculté de Médecine, 2 rue Dr Marcland, Limoges 87025, France. yves.denizot@unilim.fr
authors.forename: Yves
authors.initials: Y
authors.lastname: Denizot
authors.forename: Alain
authors.initials: A
authors.lastname: Gainant
authors.forename: Laurence
authors.initials: L
authors.lastname: Guglielmi
authors.forename: Stephane
authors.initials: S
authors.lastname: Bouvier
authors.forename: Pierre
authors.initials: P
authors.lastname: Cubertafond
authors.forename: Murielle
authors.initials: M
authors.lastname: Mathonnet
mesh_terms: D043203:1-Alkyl-2-acetylglycerophosphocholine Esterase / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000378:metabolism; D003110:Colonic Neoplasms / Q000473:pathology*; D015179:Colorectal Neoplasms / Q000473:pathology*; D006801:Humans; D009367:Neoplasm Staging; D010741:Phospholipases A / Q000378:metabolism; D010972:Platelet Activating Factor / Q000031:analogs & derivatives* / Q000378:metabolism*
chemical_list: D014408:Biomarkers, Tumor; C029271:O-deacetyl platelet activating factor; D010972:Platelet Activating Factor; D010741:Phospholipases A; D043203:1-Alkyl-2-acetylglycerophosphocholine Esterase