Out of seven modifications present in this tRNA, 2′-O-methylated G(m)18 was identified as necessary and sufficient
to suppress immunostimulation. Transplantation of this modification into the scaffold of yeast tRNA(Phe) also resulted in blocked immunostimulation. PKC inhibitor Moreover, an RNA preparation of an E. coli trmH mutant that lacks G(m) 18 2′-O-methyltransferase activity was significantly more stimulatory than the wild-type sample. The experiments identify the single methyl group on the 2′-oxygen of G(m)18 as a natural modification in native tRNA that, beyond its primary structural role, has acquired a secondary function as an antagonist of TLR7.”
“It is common to encounter two-dimensional dose finding in phase I trials, for example, in trials combining multiple drugs, or in single-agent trials that simultaneously search for the maximum tolerated dose (MTD) and the optimal treatment schedule. In these cases, the traditional single-agent dose-finding methods are not directly applicable. We propose a simple
and adaptive two-dimensional dose-finding design that can accommodate an type of single-agent dose-finding method. In particular, we convert the two-dimensional dose-finding trial to a series of one-dimensional dose-finding subtrials along shortened line search segments by fixing the dose level of one drug. BMS-777607 in vivo Fosbretabulin mw We then conduct the subtrials sequentially. Based on the MTD obtained from the completed one-dimensional trial. we eliminate the doses that lie Outside of the search ram-le based on the partial order, and thereby efficiently shrink the two-dimensional dose-finding space. The proposed design dramatically reduces the sample size and still maintains good performance. We illustrate the design through extensive Simulation studies motivated by clinical trials evaluating multiple drugs or close and schedule combinations. Copyright (C) 2008 John Wiley & Sons, Ltd.”
“The GH20 beta-N-acetyl-D-hexosaminidase OfHex2 from the insect Ostrinia furnacalis (Guenee) is a target potential for eco-friendly
pesticide development. Although carbohydrate-based inhibitors against beta-Nacetyl-D-hexosaminidases are widely studied, highly efficient, non-carbohydrate inhibitors are more attractive due to low cost and readily synthetic manner. Based on molecular modeling analysis of the catalytic domain of OfHex2, a series of novel naphthalimide-scaffold conjugated with a small aromatic moiety by an alkylamine spacer linker were designed and evaluated as efficiently competitive inhibitors against OfHex2. The most potent one containing naphthalimide and phenyl groups spanning by an N-alkylamine linker has a K-i value of 0.37 mu M, which is 6 fold lower than that of M-31850, the most potent non-carbohydrate inhibitor ever reported.