These disagreements about the mechanism of caloric restriction are confined to yeast, but may portend future disputes in the far more complex systems of mice and men.
To test this idea, the researchers used radiation to wipe out the immune systems of mice that carried a mutation in the rodent equivalent of MECP2.
Two years ago we said it was along shot that the immune systems of mice could be genetically modified to produce human antibodies to treat major diseases.
His team had primed the immune systems of mice lacking T or B cells by painting a solution containing an antigen onto their backs.
Now researchers have discovered a mechanism for how malnutrition cripples the immune systems of mice infected with the tuberculosis bacterium, and how dietary improvements can prevent TB from killing mice.
Because the digestive systems of mice, flies, and other model organisms differ from those of humans, researchers have been hard-pressed to find a way to study the development of human gut maladies such as peptic ulcer disease.
To create the model, Anthony James and his colleagues studied the molecular components in the immune systems of mice, which are able to produce antibodies that kill the malaria parasite, and then created new genes that could mimic that effect in mosquitoes.
From the 1950s into the 1970s, scientists continued to link the circulatory systems of mice (in a process called parabiosis), which helped them learn a bit about how blood works, but also left them with more observations about young blood's life-extending potential than they knew what to do with.
Cell-free transcription systems of mouse-human hybrid cell lines revealed that the promoter for mouse or the promoter for human rRNA would not function in a cell-free extract made from another species [116] [119].
These results show that tumors induced by these cancer cell lines produce common (although not identical; see below) volatile biomarkers that can be recognized by the olfactory systems of mice.
