CPT1A and breast cancer: Two radioresistant BC (RBC) cell lines (MCF7/C6 and MDA-MB-231/C4) isolated from surviving MCF7 and MDA-MB-231 residues with HER2 induction and aggressive phenotype after chronical radiation (Figure S1A) (8, 35) showed enhanced expressions of mitochondrial FAO genes CPT1A, CPT2, HADHB, and ACAD9 (Figure 1A).