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The present work is the first to deal with the determination of cholesterol synthesis rates in primary rat hepatocytes using transient (13)C-flux analysis. The effects of statins on cholesterol biosynthesis and central carbon fluxes were quantified at a therapeutic concentration of 50 nM atorvastatin using carbon-labeled glutamine. The flux through the(More)
In spinal cord explant cultures from embryonic chicken (E7) we found that both a long-time downregulation of PKC by phorbol-12,13-dibutyrate (PDBu) and an inhibition of PKC by RO-31-8220 strongly reduce neurite outgrowth. Unlike this, in the presence of a high dose of 1,2-dioctanoyl-s,n-glycerol (diC8, 60 microM), PKCalpha,beta isoforms are not(More)
An experimental set-up for acquiring metabolite and transient (13)C-labeling data in mammalian cells is presented. An efficient sampling procedure was established for hepatic cells cultured in six-well plates as a monolayer attached to collagen, which allowed simultaneous quenching of metabolism and extraction of the intracellular intermediates of interest.(More)
A wide range of drugs has been shown to prolong the QT interval of the electrocardiogram by blocking the pore-forming subunit of the rapidly activating delayed rectifier K+ channel, HERG (ether-à-go-go-related gene), sometimes leading to life-threatening arrhythmia. In this paper we describe cloning, sequence, and expression of the zebrafish orthologue of(More)
SH-SY5Y Neuroblastoma cells were used to study the effect of retinoic acid (RA)-induced differentiation on the expression of gangliosides and neuronal markers. In the presence of 10 microM RA, more than 70% of the cells differentiate to a neuronal phenotype within 8 days. They extend long neuritic processes and show an enhanced immuno-expression of(More)
Bone marrow stromal cells (BMSCs) are composed of progenitor and multipotent skeletal stem cells, which are able to differentiate in vitro into osteocytes, adipocytes, and chondrocytes. Mouse BMSCs (mBMSCs) are a versatile model system to investigate factors involved in BMSC differentiation in vitro and in vivo as a variety of transgenic mouse models are(More)
The monoclonal antibodies TAU-1 and AT8 are directed at human microtubule-associated protein tau epitopes that contain a dephosphorylated and phosphorylated Ser202, respectively, while AT180 and AT270 are anti-tau monoclonals with epitopes that require phosphorylated Thr181 and Thr231, respectively. We used these antibodies to study the developmental(More)
BACKGROUND The individual character of pharmacokinetics is of great importance in the risk assessment of new drug leads in pharmacological research. Amongst others, it is severely influenced by the properties and inter-individual variability of the enzymes and transporters of the drug detoxification system of the liver. Predicting individual drug(More)
Microtubule-associated tau proteins are hyperphosphorylated in brains from patients with Alzheimer's disease compared with normal adult human brain. At least some of the phosphorylated residues are also transiently phosphorylated in juvenile brain, but not in more mature stages. Using the monoclonal anti-tau antibodies TAU-1 and AT8, we found in cultured(More)
Critical size bone defects and non-union fractions are still challenging to treat. Cell-loaded bone substitutes have shown improved bone ingrowth and bone formation. However, a lack of methods for homogenously colonizing scaffolds limits the maximum volume of bone grafts. Additionally, therapy robustness is impaired by heterogeneous cell populations after(More)