Phosphoinositides. 3. Enzymic hydrolysis of inositol-containing phospholipids*

Phosphoinositides. 3. Enzymic hydrolysis of inositol-containing phospholipids.

Exogenous oxidants initiate hydrolysis of endothelial cell inositol phospholipids.

Oxidants released from inflammatory cells contribute to the pathogenesis of acute inflammatory edema in many models. Chemically produced oxidants can reversibly alter the barrier properties of cultured endothelial and epithelial monolayers. This report examines the effects of nonlytic doses of H2O2 on endothelial cell lipids. H2O2 oxidized omega-6 fatty acids in the endothelial cells and initia...

Changes in the levels of inositol phosphates after agonist-dependent hydrolysis of membrane phosphoinositides.

The formation of inositol phosphates in response to agonists was studied in brain slices, parotid gland fragments and in the insect salivary gland. The tissues were first incubated with [3H]inositol, which was incorporated into the phosphoinositides. All the tissues were found to contain glycerophosphoinositol, inositol 1-phosphate, inositol 1,4-bisphosphate and inositol 1,4,5-trisphosphate, wh...

The enzymic hydrolysis of carrageenin.

Carrageenin is the water soluble polysaccharide extractable from the red algae Chondrus crispus and Gigartina stellata. The polysaccharide is essentially a polymer of alpha-D-galactopyranoside-4-sulphate. Smith et al. (1954) fractionated carrageenin with potassium chloride into two components and obtained a precipitable component which could form gels and a nongelling component which remained i...

The inositol phospholipids.

T h e dried crystals melted with decomposition a t about 215”. The substance is probably an organic acid but we have not yet had time to examine it thoroughly.” (1) In this modest way inositol seems to have made its first appearance as a lipid constituent. Later in 1930, Anderson and Roberts (2) established the identity of their crystals, obtained from a phospholipid present in avian t...