Pulmonary lipid phosphate phosphohydrolase (LPP) was shown previously to hydrolyze phosphatidic acid and lysophosphatidic acid in purified rat lung plasma membranes. To better investigate the nature of pulmonary LPP isoforms and their role in the lung, LPPs were cloned by RT-PCR from both adult rat lung and type II cell RNA. The RT-PCR generated LPP1 (849 bp), up to three LPP1 variants, and LPP...

PA2 phosphatase (PAP3; 3-sn-phosphatidate phosphohydrolase, EC 3.1.3.4) catalyzes the Mg2 -dependent dephosphorylation of PA, yielding DAG and Pi (Fig. 1) (1–3). In de novo lipid synthesis, the DAG generated from the PAP reaction is utilized for the synthesis of the phospholipids PE and PC via the Kennedy pathway and for the synthesis of TAG (Fig. 1) (3). The enzyme substrate PA is also used fo...

During fertilization the spermatozoon undergoes a process of regulated exocytosis triggered by oocyte-associated agonists. An early response generated by agonist-receptor interaction in spermatozoa is the activation of mechanisms leading to Ca2+ influx, this ion being essential for the activation of phospholipases and for the fusion of the plasma membrane with the outer acrosomal membrane. Both...

The effects of therapeutic doses of dillsun, garsin, antum and statins on rat liver cytosolic phosphatidate phosphohydrolase (PAP) activity, a key enzyme in triacylglycerol synthesis, and on serum and liver lipids were examined. Lovastatin and simvastatin both stimulated the enzyme activity by 29% and 43%, respectively. The stimulatory effects were dose-dependent and accompanied by the decline ...

Artichoke (Cynara scolymus L.) is full of natural antioxidants and has a lipid-lowering effect. The aim of this study was to investigate the effect of artichoke on the liver phosphatidate phosphohydrolase (PAP), plasma lipid levels, plasma malondialdehyde (MDA), and plasma antioxidant in hyperlipidemic rats. Male rats were fed by standard pellet diet (Group 1), standard diet supplemented with 1...