In contrast, Badawy, El-Magd and AlSadrah [10] reported lower levels of the lipid peroxidation biomarker (MDA), upregulated expression of iNOS, and higher activities of antioxidant enzymes (SOD, CAT, GPx) in tumor tissues of MCF7 xenograft following treatment of rats with CM-EXOs. This evidence concerns the gene SOD1 and neoplasm.