Insulin-like growth factor receptor-1 overexpression is associated with poor response of rectal cancers to radiotherapy

Figure 4 Insulin-like growth factor receptor-1 mRNA expression by reverse transcription polymerase chain reaction in the paired pre-radiation and post-radiation samples. ^bP < 0.01 vs the paired pre-radiation specimens, the post-operative specimens showed a significantly increased insulin-like growth factor receptor-1 (IGF-1R) mRNA expression. M: Marker; 1-4a: Pre-radiation samples; 1-4b: Post-radiation samples.