Importantly, targeting a human enzyme would deprive the parasite of the most straightforward mechanism for emergence of drug resistance, namely the selection of genotypes expressing a mutated, resistant target.
It should be noted that we have used a type I IFN resistant target cell line, which restricts the latter pathways.
Since the proportion of resistant target sites was relatively low, cells were repeatedly exposed to IDLV-Y2 I-AniI to determine if the proportion of mutated sequences could be increased.
In these cases a consistent fitness cost may appear if the resistant target displays a somewhat suboptimal functionality, as has been shown, for example, with some mutations in the gene rpsL conferring streptomycin in bacteria such as E. coli or Salmonella spp. [12].
The analysis of the biological roles of miRNAs in cereals currently depends on transgenic approaches; however the identification of miRNA resistant target mRNAs that give rise to altered phenotypes in rice and barley [ 34, 35, 38] suggests that the use of high-throughput methods to identify sequence changes leading to miRNA-resistant targets will allow assessment of the roles of other miRNAs.
Preincubation with ZVAD and DEVD did not result to an improved NK cell-mediated cytolysis of both susceptible and resistant target cell lines.
The frataxin cDNA was then subcloned into the ampicillin-resistant target vector pKK223-3 by digestion with NcoI and HindIII.
Taken together, our assay provides direct evidence that loss of function of HNM1 is the major drug-resistant target for mechlorethamine.
To measure antibody functionality against pneumococcus, we performed multiplexed opsonophagocytic assays (OPAs) for pneumococcal serotypes 6B and 23F, using differentiated HL-60 cells and an antibiotic-resistant target bacteria strain, at the Research Institute for Microbial Disease, Osaka University, as previously described [ 15].
The CD8+ CTL populations generated against SCGB2A1 were able to consistently induce lysis of autologous primary (chemo-naive) and metastatic/recurrent (chemo-resistant) target tumour cells expressing SCGB2A1, whereas autologous HLA-identical noncancerous cells were not lysed.
To measure antibody functionality against pneumococcus, we performed multiplexed opsonophagocytic assays for pneumococcal serotypes 6B and 23F by using differentiated HL-60 cells and antibiotic-resistant target bacteria strains at the Research Institute for Microbial Disease, Osaka University, as previously described [ 17].
