Abstract: The present invention relates to the fields of medicine and cancer treatment. The invention more specifically relates to the use of a compound capable of decreasing or inhibiting, in vitro or ex vivo, the expression and/or activity of MAFG and thus increasing ROS-production and chemotherapy sensitivity, specifically in cancer cells resistant to platinum-based therapy. The present disclosure further relates to uses of such compounds, in particular to prepare a pharmaceutical composition to allow or improve the efficiency of a therapy of cancer in a subject in need thereof. The compound of the invention can indeed be advantageously used, in combination with at least one chemotherapeutic dmg, for treating cancer, for preventing cancer metastasis, increasing overall survival and/or for preventing cancer recurrence in a subject.