The purpose of the present invention is to provide a means with which it is possible to selectively improve the amount of a boron-containing compound accumulated in cancer cells. The present invention pertains to the use of at least one type of amino acid and/or at least one type of amino acid transport system inhibitor, these being used to improve the amount of a boron-containing compound accumulated in cancer cells.本發明之目的在於提供一種可選擇性地提高癌細胞中之含硼化合物之蓄積量之方法。本發明係關於一種用以提高癌細胞中之含硼化合物之蓄積量之至少1種胺基酸及/或至少1種胺基酸輸送系統抑制劑的利用。
