Molecular Pathways Involved in the Pathogenesis and Behavior of Mesenchymal Phosphaturic Tumors

Study Protocol Cell Culture Bone marrow and tissue samples will be obtained from the patients after they will give their written informed consent. Material will be maintained in RPMI culture medium (Sigma, R0883, Germany). Peripheral blood mononuclear cells (PBMCs) from healthy donors will be used as control. For detection of cancer cells in our samples we perform flow cytometry using EpCAM magnetic beads (39-EPC-50; Gentaur), and the negative selection cells (non-cancerous) are isolated and then cultured in a 25-cm2 flask (5520100; Orange Scientific) with RPMI-1640 medium (R6504; Sigma).

Molecular analysis RNA is extracted from cell cultures using RNeasy Mini Kit (74105; Qiagen, Hilden; Germany). iScript cDNA synthesis kit (1708891; Bio-Rad, CA; USA), is used for cDNA synthesis and Real-time polymerase chain reaction (PCR), is performed using the iTaq Universal SYBR Green Supermix (1725124; Bio-Rad). Specific primers for each marker and for an endogenous control gene (18S rRNA) is designed using Genamic Expression 1.1 software. A universal Reference RNA consisting of 10 human cancer cell lines (740000-41; Agilent) as well as human genomic DNA (G304A; Promega) will be used in quantitative PCR (qPCR) reactions Statistical analysis The qPCR results will be tested according to the Kolmogorov-Smirnov test; All the reactions (molecular assays, flow cytometry) are performed in triplicates. A p value <0.05 is considered significant.