Radioactive plumes can also leave immune deficiencies, birth defects and leukemia in their wake.
Early exposure to bacteria and viruses, they say, trains the immune system to fight off invaders, but a spotless environment leaves immune cells unemployed and spoiling for trouble.
Two versions of the model were built: a full version (+IM) with all the modules including immune responses, and a simpler version (−IM) leaving out immune responses in the lung and lymphatic compartment.
In the original formulation, self-reactive immunity was eliminated in utero, leaving active immune mechanisms to destroy "the other"— pathogens, foreign substances, altered host elements.
DOI: http://dx.doi.org/10.7554/eLife.03416.002 Antigen-based immunotherapy remains the 'holy grail' of immune tolerance because it should target only those pathogenic lymphocytes driving autoimmune, allergic, or alloreactive immunopathology, whilst leaving beneficial immune surveillance unaltered.
H.I.V. also deactivates the genes that normally fix altered cellular DNA, leaving the immune cell unable to repair continuing damage caused by the virus, the researchers said.
But a different version is likely to be chosen in the next wave of infection, leaving the immune system one step behind.
That means everyone is sleeping with his cousin and there is less variation in the species, leaving dinosaur immune systems weak against giant meteors crashing into the earth.
While Wall Street banks deal in derivatives and other risky businesses, Capital One said it focused on mom-and-pop consumers, leaving it immune to the volatility of the investment banking business.
One explanation could be that the XRCC4 mutations are hypomorphic, thus bypassing the suspected embryonic lethality and allowing V(D J recombination to occur, leaving the immune system unaffected.
