Enhancing factor (EF), a molecule that increases the binding of epidermal growth factor (EGF) to A431 cells, was first isolated in our laboratory from mouse intestines, and subsequently shown to be a secretory form of phospholipase A2 (PLA2) [Mulherkar, Rao, Wagle, Patki and Deo (1993) Biochem. Biophys. Res. Commun. 195, 1254-1263]. We had proposed earlier that EF increases the binding of EGF b...

Lipoprotein-associated phospholipase A2 (Lp-PLA2) is a unique circulating phospholipase with inflammatory and oxidative activities and the limited data regarding the relationship between Lp-PLA2 and cognitive impairment are conflicted. We conducted a cross-sectional study including 1,374 Chinese adults recruited from 2010 to 2011, aiming to evaluate the relationship between Lp-PLA2 levels and t...

Chemotaxis toward different cyclic adenosine monophosphate (cAMP) concentrations was tested in Dictyostelium discoideum cell lines with deletion of specific genes together with drugs to inhibit one or all combinations of the second-messenger systems PI3-kinase, phospholipase C (PLC), phospholipase A2 (PLA2), and cytosolic Ca(2+). The results show that inhibition of either PI3-kinase or PLA2 inh...

To determine the influence of variations in both lipid species and lipid packing on phospholipase A2 (PLA2) hydrolytic activity, the activities of two PLA2 isolated from Crotalus molossus molossus venom, were followed on unilamellar liposomes modified by membrane-active peptides. Enzymatic activity was compared with cytolytic activity on human and mouse lymphocytes. Phosphatidylcholine liposome...

BACKGROUND The aim of this paper was to investigate serum concentrations of calcium-independent lipoprotein phospholipase A2 (PLA2) and protein S100 in schizophrenia patients in comparison to healthy controls and correlate them with the clinical severity, duration, and number of schizophrenia relapses. SUBJECTS AND METHODS This study included 65 schizophrenia patients and 70 controls. Schizop...

Circulating lipoprotein-associated phospholipase A2 (Lp-PLA2) is a marker of inflammation that plays a critical role in atherogenesis; its inhibition may have antiatherogenic effects. Studies from the West of Scotland Coronary Prevention Study (WOSCOPS), Monitoring Trends and Determinants in Cardiovascular Diseases (MONICA) and Rotterdam cohorts have shown that Lp-PLA2 is an independent predict...

The phospholipase A2 (PLA2) family comprises a group of lipolytic enzymes that typically hydrolyze the sn-2 position of glycerophospholipids to give rise to fatty acids and lysophospholipids. The mammalian genome encodes more than 50 PLA2s or related enzymes, which are classified into several subfamilies on the basis of their structures and functions. From a general viewpoint, the PLA2 family h...

Human cytomegalovirus (HCMV) is known to carry host cell-derived proteins and mRNAs whose role in cell infection is not understood. We have identified a phospholipase A2 (PLA2) activity borne by HCMV by using an assay based on the hydrolysis of fluorescent phosphatidylcholine. This activity was found in all virus strains analyzed and in purified strains. It was calcium dependent and was sensiti...

This article is available online at http://www.jlr.org Arachidonic acid (AA) is a precursor of eicosanoids, including prostaglandins, thromboxanes, and leukotrienes, playing an important role in several physiological functions ( 1 ). The biosynthesis of these AA metabolites occurs mainly through the activation of phospholipase A2 (PLA2) in response to a wide variety of stimuli such as cytokines...

In the present study, we studied the involvement of A2 phospholipases (PLA2) in alpha2-adrenergic receptor-control of preadipocyte actin cytoskeleton. For that, various PLA2 inhibitors were tested on the ability of the selective alpha2-adrenergic agonist UK14304 to induce the spreading in alpha2AF2 preadipocytes. We observed that, whereas several Ca(2+)-dependent PLA2 blockers were ineffective,...