Drug-Mediated Shortening of Action Potentials in LQTS2 Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes.

Cardiomyocytes (CMs) derived from human induced pluripotent stem cells (hiPSCs) are now a well-established modality for modeling genetic disorders of the heart. This is especially so for long QT syndrome (LQTS), which is caused by perturbation of ion channel function, and can lead to fainting, malignant arrhythmias and sudden cardiac death. LQTS2 is caused by mutations in KCNH2, a gene whose protein product contributes to I (also known as HERG), which is the predominant repolarizing potassium current in CMs.

Phosphine-imine and -enamido ligands for acceptorless dehydrogenation catalysis.

A highly tunable phosphine-imine ligand family is introduced. Following metallation with ruthenium, deprotonation of the ligand affords a phosphine-enamido species. Complexes with the ligand in both the imine and enamido forms are active toward acceptorless dehydrogenation reactions.

Small molecule absorption by PDMS in the context of drug response bioassays.

The polymer polydimethylsiloxane (PDMS) is widely used to build microfluidic devices compatible with cell culture. Whilst convenient in manufacture, PDMS has the disadvantage that it can absorb small molecules such as drugs. In microfluidic devices like "Organs-on-Chip", designed to examine cell behavior and test the effects of drugs, this might impact drug bioavailability.

A pendant phosphorus Lewis acid: route to a palladium-benzoyl derived phosphorane.

The traditional use of phosphorus compounds is as ligands for transition metals, however herein we synthesize Lewis acidic fluorophosphonium cation appended to a palladium complex and effect CO insertion into a Pd-C bond to obtain an unprecedented metal-benzoyl derived phosphorane.