Do inositol supplements enhance phosphatidylinositol supply and thus support endoplasmic reticulum function?

Membrane phospholipid synthesis and endoplasmic reticulum function.

This review presents an overview of mammalian phospholipid synthesis and the cellular locations of the biochemical activities that produce membrane lipid molecular species. The generalized endoplasmic reticulum compartment is a central site for membrane lipid biogenesis, and examples of the emerging relationships between alterations in lipid composition, regulation of membrane lipid biogenesis,...

Hyperhomocysteinemia and function of the endoplasmic reticulum.

Endoplasmic Reticulum Ca2+ Increases Enhance Mutant Glucocerebrosidase Proteostasis

Altering intracellular calcium levels is known to partially restore mutant enzyme homeostasis in several lysosomal storage diseases, but why? We hypothesized that endoplasmic reticulum (ER) calcium increases enhance the folding, trafficking and function of these mutant misfolding- and degradation-prone lysosomal enzymes by increasing chaperone function. Here we report that increasing ER calcium...

TRB3 function in cardiac endoplasmic reticulum stress.

RATIONALE Tribbles (TRB)3 is an intracellular pseudokinase that modulates the activity of several signal transduction cascades. TRB3 has been reported to inhibit the activity of Akt protein kinases. TRB3 gene expression is highly regulated in many cell types, and amino acid starvation, hypoxia, or endoplasmic reticulum (ER) stress promotes TRB3 expression in noncardiac cells. OBJECTIVE The ob...

Phosphatidylinositol and inositol phosphate metabolism.

The six carbons that comprise the inositol ring can be phosphorylated in a combinatorial manner, generating a truly astonishing range of inositol phosphates and inositol lipids. Yet, somehow, the cell can distinguish and utilize several of these metabolites to specifically regulate a variety of signal transduction processes. These important actions have infiltrated so many areas of cell biology...