The fact that CFM-4 treatment of Daoy cells resulted in a 2-fold down-regulation of MMP10 (Table 1), and that the activities of MMPs were found to be associated with glioblastoma and MB cell invasiveness [33]–[35], we determined whether and to what extent exposure to CFMs resulted in reduced activities of various MMPs. The gene discussed is MMP10; the disease is glioblastoma.