These discoveries allowed the development of transient replication assays, selectable full length genomes and a variety of novel replicons that will be useful for basic studies and facilitate the development of antiviral drugs.
These variants exhibit distinct DNA-binding properties, different phenotypes in site-specific integrative and excisive recombination by phage λ integrase in vitro, as well as in pSC101 replication assays in a ΔIHF E. coli host.
In summary, CD44 MicroBeads provide the means not only to concentrate dilute viral samples, but also to directly facilitate within days rather than weeks the in vitro expansion of patient isolates independent of coreceptor usage and the performance of HIV replication assays that require a large fraction of infected primary T cells.
Four strategies have been pursued to identify inhibitors of DENV through targeting both viral and host proteins: (i) HTS (high-throughput screening) using virus replication assays; (ii) HTS using viral enzyme assays; (iii) structure-based in silico docking and rational design; (iv) repurposing hepatitis C virus inhibitors for DENV.
Before using these proteins in replication assays, we first conducted RNA band-shift assays to test their ability to bind purified hY1 RNA (Fig. 5C).
For ELA1 gene both shRNA clones show lower diminution in mRNA levels (figure S4E), but the replication assays indicate a high reduction in HIV-1 replication.
In bacterial replication assays, the strain used in this study were HP238, and its vacA or cagA isogenic mutants [8] at a multiplicity of infection of 1∶10.
An artifactual background due to DNA repair appeared in our DNA replication assays with time at 37°C, which we could abolish by using a DNA repair inhibitor (see Data S1, Fig. S4 and Fig. S5).
To define the mode of action for these acridine derivatives leading to inhibition of TBSV RNA accumulation, we took advantage of efficient in vitro replication assays developed for tombusviruses.
The main observation of our immunoprecipitation experiments and in vitro DNA replication assays is that RNP formation between hY RNAs, Ro60 and La is not required for Y RNA function in DNA replication.
As described above, human PBMC and THP-1 macrophages were infected at MOI 1∶1 (greater MOI than that in the replication assays due to the low percentage of bound bacteria).
