Co-lethality, or synthetic lethality is the documented genetic situation where two, separately non-lethal mutations, become lethal when combined in one genome.
Cell viability and lethality are the two parameters which are used to measure the toxicity caused by the nanoparticles.
Synergistic interactions occur when a double-mutant has a more extreme effect on the fitness than would be expected from independent single mutants alone, and can therefore identify e.g. complementary pathways, with synthetic lethality being the extreme case (wij = 0).
Synthetic lethality is the lethality resulting when two, individually survivable, mutations, are co-present [ 14].
For many disease models, repair or restoration of tissue function, not lethality, is the translational goal.
Nevertheless, in all three experiments, the timing of expression of 'Type 1' and 'Type 2' lethality was the same.
E. coli causes the colibacillosis such as acute septicaemia, vitelline peritonitis, enteritis, genital diseases, and so forth, its morbidity and lethality are the highest in bacterial diseases of chicks in China [ 1, 2].
While new vaccines with fewer adverse consequences are being developed (3 ), the existing vaccines, which have potential side effects and a not negligible lethality, are the only vaccines available (4, 5 ).
One example of successfully targeting DNA repair for synthetic lethality is the use of poly (ADPribose poly-merase (PADPribose poly-meraseCA1/BRCA2-mutant breast cancer or ovarian cancer cells [21], [22].
The positive interactions (or alleviating epistatic effects) should result in positive scores (s ab > 0), and the negative interactions (aggravating epistatic effects) in negative scores (s ab < 0), with synthetic lethality being the extreme case (w ab = 0).
