title: Methotrexate resistance in murine and human continuous tumour cell lines: an examination of the different mechanisms involved depending on the order of resistance expressed.
mesh_terms: D000818:Animals; D002460:Cell Line; D004351:Drug Resistance; D005784:Gene Amplification; D006801:Humans; D008727:Methotrexate / Q000378:metabolism / Q000494:pharmacology*; D009369:Neoplasms / Q000188:drug therapy; D013762:Tetrahydrofolate Dehydrogenase / Q000032:analysis / Q000096:biosynthesis / Q000235:genetics
chemical_list: D013762:Tetrahydrofolate Dehydrogenase; D008727:Methotrexate