Inhibition of hFPPS is a clinically validated mechanism for the treatment of lytic bone diseases, including osteoporosis and cancer related
bone metastases. A new series of thienopyrimidine-based bisphosphonates (ThP-BPs) were identified that inhibit hFPPS with low nanomolar potency. Crystallographic evidence revealed binding of ThP-BP inhibitors in the allylic subpocket of hFPPS. Simultaneous binding of inorganic pyrophosphate in the IPP subpocket leads to conformational closing of the active site cavity. The ThP-BP analogues are significantly less hydrophilic yet exhibit higher affinity for the bone mineral hydroxyapatite than the current N-BP drug risedronic acid. The antiproliferation properties of LOXO-101 mouse a potent ThB-BP analogue was assessed in a multiple myeloma cell line and found to be equipotent to the best current N-BP drugs. Consequently, these compounds represent a new structural class of hFPPS inhibitors and a novel scaffold for the development of human therapeutics.”
“The aerial
parts of Chromolaena pulchella biosynthesize two groups of ditierpenes belonging to opposite enantiomeric series, specifically, the furanoid ent-clerodanes (5R,8R,9S,10R)-(-)-hardwikiic acid (1), methyl (5R,8R,9S,10R)-(-)-hardwikiate (2), (55,8R,9S,10R)-(-)-hautriwaic acid lactone (3), methyl (5R,8R,9S,10R)-(-)-nidoresedate PX-478 datasheet (4) and methyl (8R,9R)-(-)-strictate (5), as well as the labdanes (5S,8R,9R,10S)-(+)-(13E)-labd-13-ene-8,15-diol (6) and (5S,8R,9R,10S)-(+)-isoabienol (7). The absolute configuration of the two groups of diterpenes was unambiguously assigned by comparison of the vibrational circular dichroism spectra of 3 for ent-clerodanes, and of 7 for labdaries with GDC-0994 their theoretical spectra obtained by density functional theory calculations. The results support a biogenetic proposal to diterpenes found in the studied botanical species. (C) 2011 Elsevier Ltd. All rights reserved.”
“Cannulated AO screws are commonly used for fracture fixation.
Mechanical failure of screws has been well reported but this was mainly breakage of the screw head during removal. We report an unusual mode of failure of an AO self drilling cannulated screw which we have not previously experienced, where the screw threads were found to be unravelled during insertion. We also suggest the way to recognise this complication early and how to prevent or deal with it.”
“Trichomoniasis is the most common sexually transmitted disease, caused by a motile flagellate non-invasive parasitic protozoan, Trichomonas vaginalis (T. vaginalis). More than 160 million people worldwide are annually infected by this protozoan. T. vaginalis occupies an extracellular niche in the complex human genito-urinary environment (vagina, 432 cervix, penis, prostate gland, and urethra) to survive, multiply and evade host defenses. T. vaginalis (strain G3) has a similar to 160 megabase genome with 60,000 genes, the largest number of genes ever identified in protozoans. The T.