“…Numerous genes, such as transcription factors, growth factors, cytokines as well as HIF-1α, are involved in regulating the gene expression of TfR1 [ 141 , 144 , 218 , 219 , 220 ]. An association was shown between some pathophysiologic conditions and genetic alterations within the TfR [ 221 , 222 , 223 , 224 , 225 ]. However, there is limited evidence of an association between genetic variants of TfRs and cancer.…”