Magnesium deficiency affects HNF1β expression in rat liver in vivo and in vitro.

Hepatocyte nuclear factor 1β (HNF1β) is a transcription factor that is involved in embryonic development and tissue-specific gene expression in several organs, including the kidney and the liver. HNF1β mutations are associated with hypomagnesemia and renal magnesium wasting; however, to date, the exact molecular mechanism involved in this regulation is unclear. Furthermore, it is not known whether the Mg concentration could per se participate to this regulation by modifying HNF1β expression.

A novel biochromatographic Oatp2 column to study the transmembrane transport of statins.

In a previous paper, using a biophysical model system to study the passive diffusion of the statin molecules through the cell membrane, our group demonstrated that statins could cross biological membrane by passive diffusion (Sarr et al. [40]). However, in the liver, the uptake of statins would also be mediated by organic anion transporting polypeptides (Oatps) like Oatp2 a member of this family.

Statins (HMG-coenzyme A reductase inhibitors)-biomimetic membrane binding mechanism investigated by molecular chromatography.

Many studies have demonstrated that the statin beneficial effects on cardiovascular diseases like coronary are linked to their hypocholesterolemic properties. These lipid-lowering drugs are the first-line pharmacologic therapy for hypercholesterolemia. In this paper, the interaction of a series of statin molecules STCOOH (pravastatin (prava), mevastatin (meva), simvastatin (simva) and fluvastatin (fluva)) with a phosphatidylcholine monolayer immobilized on to porous silica particles has been studied using a biochromatographic approach (molecular chromatography).

Magnesium cation effect on passive diffusion of statin molecules: molecular chromatography approach.

Recently, immobilized artificial membranes (IAMs) have been introduced as HPLC column packing materials. IAMs consist of phosphatidylcholine residues, the most common phospholipids in natural membranes, covalently bound to silica propylamine and consequently mimic fluid phospholipid bilayer. Thus, the immobilized artificial membrane provided a biophysical model system to study the passive diffusion of the statin molecules through the cellular membrane.