We have investigated the inhibitory potential of prostaglandin E2 (PGE2) with respect to intracellular messengers implicated in the signaling system ofT-lymphocyte activation pathway. Using the fluorescent indicator Quin 2, it is demonstrated that PGE2 inhibits the increase in cytosolic-free calcium concentration ICa211. Reconstitution of calcium mobilization in the presence of PGE2 by the calc...

Millions of women of child-bearing age have substantial bone lead stores due to lead exposure as children. Dietary calcium ingested simultaneously with lead exposure can reduce lead absorption and accumulation. However, the effects of dietary calcium on previously accumulated maternal lead stores and transfer to the fetus have not been investigated. We studied the effects of lead exposure of fe...

The type and the amount of binders decisively influence the characteristics of tablets prepared by wet granulation procedure. Commonly used binders like acacia, gelatin, starch and hydrolyzed starch have natural origin. The aim of this study was to evaluate the effectiveness of a new binder extracted from Hibiscus esculentus (Okra gum) in tableting. binder Hibiscus esculentus gum was extracted ...

Transient receptor potential vanilloid channel 4 (TRPV4) is a polymodally activated nonselective cationic channel implicated in the regulation of vasodilation and hypertension. We and others have recently shown that cyclic stretch and shear stress activate TRPV4-mediated calcium influx in endothelial cells (EC). In addition to the mechanical forces, acetylcholine (ACh) was shown to activate TRP...

Primary cultures of neonatal rat cardiocytes were exposed for 24 hours to culture media containing 0-2.0 mM extracellular calcium. Both atrial natriuretic factor (ANF) messenger RNA (mRNA) and ANF secretion were increased approximately threefold in the presence of 2.0 mM CaCl2 (vs. Ca2(+)-free medium). When cardiocytes were treated with the calcium channel blockers diltiazem, nifedipine, or ver...

Habituation in response to repetitive depolarization of PC12 cells can be used as a model for memory processes at the molecular level. In response to depolarization by high external potassium, a triphasic elevation in internal calcium levels occurred. Calcium elevation was maximal immediately after addition of the stimulus (phase 1), followed by a 2-min period in which the calcium level decreas...

BACKGROUND If literature protocols are followed, conversion of an advanced ketal ester intermediate (available in kilogram quantities via a published Paal-Knorr synthesis) to cholesterol-lowering drug atorvastatin calcium is hampered by several process issues, particularly at the final stage where the hemi-calcium salt is obtained. RESULTS We developed a high-yielding synthesis of atorvastati...

Injection of sulfate ions into the cement matrix with water by wet spraying due to high moist in environment is reason deterioration acceleration and durability decrease time. The effects introduction redispersible polymers (RP) calcium formate on increasing decreasing effect caused were studied. Vinyl-acetate/versatate, vinyl-acrylic copolymer mixed nine separate mixtures at a concentration ad...