TAT and neoplasm: The mean survival period of the untreated rats was 18.2 days, with all rats dying by 21 days after tumor inoculation The mean survival period of rats treated with CPT solution (23.0 days), CPT-loaded MPEG-PCL (22.0 days), and CPT-loaded MPEG-PCL-Tat (32.6 days) was longer than that of untreated rats.