The present Invention provides a fusion protein of urinary Trypsin Inhibitor (UTI), where the partner is an fc fusion protein. Also relates to pharmaceutical compositions. This fusion protein is useful in the treatment of Cancer and AIDSLa presente invencion provee proteinas de fusion del inhibidor de tripsina urinaria (UTI), donde el companero de fusion es un polipeptido Fc. Se refiere tambien a composiciones farmaceuticas. Dicha proteina de fusion es util en el tratamiento de cancer y SIDA