Preliminary data from a 6-day attenuation assay in HC-04 cells showed that like irradiated PfSPZ (Hoffman et al., 2010; Epstein et al., 2011), none of the PfΔ b9Δ slarp sporozoites developed to mature liver-stage parasites expressing PfMSP-1 (data not shown), as aseptic, purified, cryopreserved WT sporozoites (Roestenberg et al., 2013).
In this system, a large lot of virus is produced and extensively verified for titer, sterility, and viral attenuation by assays that include the stringent monkey neurovirulence test.
Adhesion to fibronectin (Fig. 2A) showed comparable effects for all mutations with the exception of Y559F, which showed signal attenuation in this assay, while it displayed wild-type behavior for ICAM-1.
For instance, neuronal differentiation is affected at low nanomolar levels of CH3HgCl (Zimmer et al. 2011b), just as in the MINC assay, whereas attenuation of human neurite outgrowth (Stiegler et al. 2011), and inhibition of CNS neural stem cell migration (Moors et al. 2009) requires significantly higher concentrations.
In contrast to increased resistance to cisplatin in short-term cytotoxicity assays, CCNE1 attenuation reduced clonogenic survival of OVCAR-3 cells after cisplatin treatment (Figure 5B).
Furthermore, in vitro processing assays showed attenuation of Drosha processing from extracts depleted of p68/p72.
In this work, the influence of GU base pairs on the effectivity of translation attenuation by miRNAs is assayed by mutating binding sites and comparing attenuation effectivity to wild type binding sites Introducing three GU base pairs into the mRNA/miRNA duplex did, with only minor changes to the binding energy, almost completely destroy the functionality of the binding site.
However, the xthA/nfo mutant was 2-fold attenuated in an in vitro competition assay in LB broth (Table 3), and, therefore, the attenuation does not prove that phagocytic oxygen radicals mediate this apparent DNA damage.
Quercetin was able to reverse the β-catenin transcriptional activation in vitro as demonstrated by luciferase gene reporter assay in HEK293 cells and attenuation of β-catenin target gene activation in co-cultured CPCs (Supporting Information Fig S7A and B).
DMSO (0.5%) was selected as an acceptable compromise allowing compound addition up to 50 μM with an acceptable attenuation of fluorescence of 20% for the T. brucei assay and 15% for the MRC5 assay.
The efficacy of VT in our in vitro TC migration assays may additionally reflect an attenuation of EC surface adhesion molecules that can facilitate TC diapedesis for example, VCAM-1 and ICAM-1 (Kumpers et al, 2011).
