In the experiments with free uptake of B-ASOs and with ASO anti-EGFR, expected to decrease endogenous EGFR mRNA levels [23,24], lower boron accumulation (16 and 10 μg B/g cells) was observed in A431 and U87-MG cancer cells than in the experiments without antisense EGFR silencing, where boron uptake was 27 and 24 μg B/g cells, respectively. This evidence concerns the gene EGFR and cancer.