Abstract
We prepared hydroxyapatite (HAP) beads containing doxorubicin hydrochloride (DOX) and buthionine sulfoximine (BSO), as a DOX and BSO-HAP complex. When the complex was implanted into mice bearing sarcoma 180 tumor, the antitumor effect of the complex was intensified 1.5-fold, as assessed using tumor volume, on day 27 as compared with that of a complex of DOX-HAP only. Therefore, we concluded that the antitumor effect of the DOX and BSO-HAP complex was increased through depletion of the intracellular radical scavenger glutathione (GSH) by released BSO and subsequently free radicals produced by released DOX.
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