In fact, the migration of the biomimetic nanoplatform designed in this study (which had greatly overexpressed CCR2 containing MSC), termed CCR2-SCM@MSN, was greatly improved towards the mouse glioma cell line GL261 that received X-ray irradiation pre-treatment (especially in comparison to cells that had not received X-ray irradiation). The gene discussed is CCR2; the disease is central nervous system cancer.