Abstract: Method for the production of bi-functional cells comprising engineering a starting cell population with a phenotype attributable to human pericytes extracted from adipose tissue (AD-PC), obtaining engineered cells, known as bi-functional AD-PCs, expressing (which means that they produce) simultaneously both the anti-tumor molecule TRAIL and also the truncated form of a chimeric receptor targeted against the GD2 antigen (GD2 tCAR); this dual targeting (understood as reaching a specific target), based on affinity and mediated by both TRAIL and also GD2 tCAR, supports the prediction of combining site-specificity with a prolonged retention of AD-PCs in tumors expressing the antigen GD2, so as to achieve a more effective release of TRAIL for still incurable tumors.