Although elemental incorporation rates can be modified by exogenous and endogenous factors including temperature, growth rate and physiological status [41] [43], these effects are typically small in magnitude compared to those driven by the large gradients in dissolved ambient concentrations between fresh and marine habitats.
In the present study, we evaluate if the onset of the disease can be modified by exogenous treatment with cytokines known to act synergistically in promoting a proinflammatory response [ 29], in order to better clarify the role of immune cells in scrapie in the central nervous system of mice.
In the present version of the model, the threshold level is modified by in an exogenous way but, as it has been observed, it is likely to be itself under genetic control.
A genetically modified organism (GMO) is defined as a living organism whose genome has been modified by the introduction of an exogenous gene able to express an additional protein that confers new characteristics, such as enhancement of the nutritional properties, herbicide resistance or insect protection.
In phase I, an exogenous molecule is modified by the addition of a functional group such as a hydroxyl, a carboxyl, or a sulfhydryl.
The DNA methylome undergoes programmed changes during cellular differentiation, but it can be also modified by exogenous stimuli such as the diet and environmental factors, some of which are of the same typology as known atherosclerosis risk factors [ 3, 4].
Indeed, transgenesis of α-syn induced by viral overexpression in the nigro-striatum, induces dystrophic terminals in the striatum containing α-syn aggregates, which are not modified by exogenous administration of GDNF [ 146, 147].
Studies by Paterson et al. (1977) demonstrated that gene expression could be modified through the use of exogenous nucleic acids that were complementary to target RNAs.
Leishmania can readily be modified genetically [ 17- 20] to yield lines expressing high levels of exogenous transgenes.
It is well appreciated that the human T-cell response can be modified using viral and non-viral vectors to promote the selective targeting of cancer cells by introducing exogenous T-cell receptors (TCRs) or chimeric antigen receptors (CARs) [ 161].
Whether induced by exogenous or endogenous mutagens or introduced during reconstruction of the damaged DNA, either a single base pair can be modified or there can be a larger-scale event such as gain or loss of a chromosome segment.
