[High-dose Methotrexate/leucovorin Adjuvant Chemotherapy of Osteogenic Sarcoma: Biochemical Effects in DNA-synthesis of Bone Marrow Cells (author's Transl)]
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DNA metabolism in bone marrow cells was measured under high-dose Methotrexate/Leucovorin adjuvant chemotherapy of a patient with primary amputation of his right leg because of osteogenic sarcoma. The biochemical data showed that there was no rescue effect of Leucovorin after 200 mg/kg Methotrexate. Corresponding to this "biochemical failure" of the rescue effect the patient died from the complications of a long and very severe bone marrow suppression. To improve the safety of this therapeutic regimen the intravenous injection and in some cases a higher dose of Leucovorin is recommended.
Effect of methotrexate concentration and exposure time on mammalian cell survival in vitro.
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