A direct interaction between the sigma-1 receptor and the hERG voltage-gated K+ channel revealed by atomic force microscopy and homogeneous time-resolved fluorescence (HTRF®).

The sigma-1 receptor is an endoplasmic reticulum chaperone protein, widely expressed in central and peripheral tissues, which can translocate to the plasma membrane and modulate the function of various ion channels. The human ether-à-go-go-related gene encodes hERG, a cardiac voltage-gated K(+) channel that is abnormally expressed in many human cancers and is known to interact functionally with the sigma-1 receptor. Our aim was to investigate the nature of the interaction between the sigma-1 receptor and hERG.

Serotypes A1 and A2 of Mannheimia haemolytica are susceptible to genotypic, capsular and phenotypic variations in contrast to T3 and T4 serotypes of Bibersteinia (Pasteurella) trehalosi.

Mannheimia haemolytica and Bibersteinia (Pasteurella) trehalosi are the most common bacterial isolates that cause pulmonary diseases in ruminants worldwide. The disease is determined by specific serotypes found in cattle and small ruminants. The molecular epidemiology of strains involved in disease is important in the control of outbreaks as well as in the preparation of vaccines.

D-myo-inositol 1-phosphate as a surrogate of D-myo-inositol 1,4,5-tris phosphate to monitor G protein-coupled receptor activation.

Phospholipase C beta (PLC-beta)-coupled G protein-coupled receptor (GPCR) activities traditionally are assessed by measuring Ca2+ triggered by D-myo-inositol 1,4,5-trisphosphate (IP3), a PLC-beta hydrolysis product, or by measuring the production of inositol phosphate using cumbersome radioactive assays. A specific detection of IP3 production was also established using IP3 binding proteins. The short lifetime of IP3 makes this detection very challenging in measuring GPCR responses.

Serological and molecular comparison of Mannheimia haemolytica and Pasteurella trehalosi strains isolated from wild and domestic ruminants in the French Alps.

Over a period of 17 years, 84 bacterial isolates identified as Mannheimia haemolytica or M. glucosida, and 52 isolates identified as Pasteurella trehalosi were detected in the lungs of domestic and wild ruminants in the French Alps. The isolates were serotyped according to their surface capsular antigens, and those sharing common antigens were further characterized by pulsed field gel electrophoresis.

Optimized synthesis of functionalized fluorescent oligodeoxynucleotides for protein labeling.

Phthalimido-alkanol solid supports were rapidly prepared from solid supported phthalic anhydride and amino alcohol condensation induced by microwaves. These supports were used to synthesize 5'-fluorescent 3'-aminoalkyl oligodeoxynucleotides allowing a two-step deprotection necessary to avoid aminolink alkylation. After conversion into an NHS derivative using dissuccinimidyl suberate and an optimized isolation, they were conjugated with a protein.