Wilms10T Cells

The Wilms10T cell line was derived from a primary Wilms tumor sample obtained from a patient with Wilms tumor, a pediatric nephroblastoma. This cell line is characterized by a homozygous deletion of the WT1 gene, leading to a complete loss of WT1 function, a critical gene involved in kidney development and the maintenance of normal renal differentiation. Unlike many other Wilms tumor cell lines, Wilms10T lacks any WT1 protein expression, which is reflective of the severe genetic alterations present in this tumor subtype. Additionally, the Wilms10T cell line exhibits loss of heterozygosity (LOH) in the 11p15 chromosomal region, which includes important genes like IGF2, further contributing to its tumorigenic properties.

Wilms10T cells have a stable normal karyotype with no major chromosomal rearrangements apart from the specific deletion of the WT1 region. This cell line has been utilized extensively to study the effects of complete WT1 loss on tumor biology, including its impact on cell proliferation, differentiation, and response to various signaling pathways. The cells retain mesenchymal characteristics, expressing markers such as vimentin, while lacking epithelial markers like cytokeratin, indicative of their stromal origin.

Significant research has focused on the signaling pathways active in Wilms10T cells. Proteomic studies have demonstrated that these cells show activation of several receptor tyrosine kinases (RTKs) such as IGF1R, PDGFRβ, and AXL, which are known to drive tumorigenesis. Additionally, downstream signaling pathways, including the MAPK and PI3K/AKT pathways, are activated in Wilms10T cells, contributing to their aggressive tumor phenotype. The comprehensive characterization of Wilms10T makes it a valuable model for investigating the molecular underpinnings of Wilms tumor with complete WT1 loss, as well as for exploring potential therapeutic targets in this aggressive tumor subtype.