These similarities between the pathways of acquisition and reversion of RAMs suggest the importance of compensatory effects between mutations.
These lines were isolated from the same spontaneous arising BALB/c mammary tumor [ 5, 6] but appear to have followed divergent pathways for acquisition of their metastatic phenotypes [ 12].
Such changes include silencing of the p16ink4a tumour suppressor associated with promoter hypermethylation [ 15, 17- 19], silencing of the transforming growth factor beta pathway via acquisition of repressive chromatin [ 20] and increased expression of the cancer-associated chromatin methyltransferase EZH2 [ 20].
In addition to the accepted notion that neuroblastoma differentiates towards a sympathetic ganglion cell phenotype in vivo [6] and in vitro [7], recent evidence has suggested a neuroendocrine maturation pathway with acquisition of chromaffin features.
There is therefore a critical need to define more precisely the pathways of EVD acquisition by HCWs, to optimise measures for reducing risks during the current and future outbreaks.
For example, increasing evidence has demonstrated that iron has a role in the tumor microenvironment and pathways of iron acquisition, efflux, and regulation are all perturbed in cancer [ 12].
Whereas students are more open to adapt modern technologies and environments into their learning activities [ 11, 48], our study suggests that GPs are more likely to continue their common pathways of knowledge acquisition.
These results suggest a correlation between the reactivation of Wnt pathway and acquisition of a stem cell-like transcriptional program, which has been associated with increased risk of developing recurrent cancer42,56,57.
Person-to-person transmission is a potential pathway of Pseudomonas aeruginosa acquisition in cystic fibrosis.
To assess the role of lipase in the pathway of fatty acid acquisition for Fas2 processing, we tested the growth of Fas2 KO strain in the presence of intralipid and olive oil (data not shown), which are the substrates of secreted lipases.
Given the apparent nature of pathway acquisition through a series of horizontal transfer events, these missing genes are likely to reflect early stages in the acquisition of the pathway, with some species yet to acquire some genes.
