There is a general agreement that a large subpopulation of serous ovarian cancers arise from the fallopian tube mucosal epithelium. However, there is still some debate as to whether the cancers originate from a secretory or ciliate cell lineage. One well established method for determining the origin of a cell line is to document the expression of genes and proteins that are cell type specific. Lineage or tissue specific patterns of gene expression are evidence of direct decent from a given cell type within a tissue. It has recently been established that the Tumor Protein TAp73 gene (TP73) is expressed in basal epithelial cells that develop into multiciliate cells. TP73 expression is therefore a marker for basal stem cells that are predestined to differentiate into cells with motile cilia and its expression is maintained in fully differentiated multiciliate cells. Interestingly TP73 expression has also been observed in a high percentage of epithelial ovarian cancers. With this in mind, it is hypothesized that a high percentage of epithelial ovarian cancers which express TP73 originate from a ciliate cell lineage.
Medical Hypotheses – Elsevier
Published: Sep 1, 2017
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