Some studies commit to a clinical positivity cutoff of 1% of mutated cells for diagnostic MPN implications [ 27, 28].
As an indication of the clonal expansion of p53 mutated cells, six of these were dysplastic patients (three LGD, three HGD), suggesting that this clonal expansion step was linked to the histological progression of Barrett's tissues (P=0.13).
Hence, recovery of mutated cell by pelvic lavage after resection of rectal cancer was hypothesized to be of prognostic value.
This logic suggests that a small proportion of the microenvironmental effects of an oncogenic mutation will enhance the success of the mutated cell.
Moreover, the necessity in LCLs to select for rare mutated cells capable of further proliferation often manifests itself in the form of a proliferative crisis, a phenomenon we did not observe in CD40-stimulated B cell lines.
The same mutation was also detected in the oesophageal gland acini suggesting bi-directional flow of mutated cell progeny similar to that seen in the Brunner's gland.
However, the higher drug sensitivity of the G allele-containing cell lines was observed in both p53 mutated and non-mutated cell lines of the JFCR-45 panel.
In BRAFV600E mutated cells inhibition of BRAF pathway lead to a decrease in ERK1/2 phosphorylation and cyclin D1 levels and an increase in p27Kip1.
(32) On the other hand, in p53 mutated cells, activation of FAK/Rho upregulates the PI-3-kinase and Akt, which inhibits miR-200s and causes a mesenchymal phenotype.
By chance, in a very small proportion of mutated cells the combination of genes affected will be such that it endows them with survival advantage and preferential retention during prolonged passaging.
