Moreover, embryonic lethality and development of non-epithelial tumours are another important limitation of genetically mutated Brca2 mice.
When the gene encoding SPS1 (SPS1, also designated patufet) was deleted in Drosophila, the embryo showed lethality during development [ 14], and reactive oxygen species (ROS) levels increased [ 15].
Here, we show that hppy overexpression results in partial lethality during development and that the surviving flies have smaller wings due to the loss of epithelial cells.
Furthermore, certain hospitals have reported nosocomial outbreaks in crowded conditions, which are associated with high case lethality and development of lung sequelae [ 9].
Differentially expressed genes within these pathways were subsequently investigated for any mammalian phenotypes associated with maternal performance, such as post-natal growth retardation, post-natal lethality, mammary gland development and maternal/paternal imprinting by data mining the Mouse Genome informatics (MGI) database [ 61].
Robotic military systems with varying degrees of lethality are under development – and in some cases already deployed – by the US, South Korea, China, Israel and the UK, as defence budgets around the world respond to the forces of austerity which demand greater capability for less money.
As reported before, we found that deleting Cdc42 in embryonic cardiomyocytes caused lethality with heart development defects (thin ventricle walls).
A recent study revealed that a maternally expressed WRKY transcription factor controls hybrid lethality during seed development in interploidy crosses of Arabidopsis ecotypes [6].
As another example, the inactivation of the Retinoblastoma tumor suppressor (Rb) in Gfap expressing cells led to perinatal lethality and astrocytoma development in mice [50].
In addition, this strategy overcomes a clear limitation of loss-of-function screens in that it allows the identification of genes that generate lethality earlier in development, through restricting misexpression to a specific tissue or group of cells.
