“…Methotrexate (MTX) is an antineoplastic drug that may be related to folic acid metabolism (Kalemci et al, ). MTX, which is an antagonist of folic acid, is used as an antimetabolite in cancer chemotherapy, leukemia, mammary gland tumors, osteosarcoma, psoriasis, and autoimmune disorders, inhibiting the synthesis of RNA, thymidylate, proteins, and especially DNA (Ali, Rashid, Nafees, Hasan, & Sultana, ; Gautam et al, ; Kalemci et al, ). MTX causes toxic effects in various organs such as kidneys, livers, and bone marrows (Ulusoy, Öztürk, & Sönmez, ) but the precise mechanism in kidney toxicity by MTX remains unclear.…”