Methotrexate

**Semantic type:** Amino Acid, Peptide, or Protein|Pharmacologic Substance

**Definition:** An antimetabolite and antifolate agent with antineoplastic and immunosuppressant activities. Methotrexate binds to and inhibits the enzyme dihydrofolate reductase, resulting in inhibition of purine nucleotide and thymidylate synthesis and, subsequently, inhibition of DNA and RNA syntheses. Methotrexate also exhibits potent immunosuppressant activity although the mechanism(s) of actions is unclear.

**Synonyms:** - 4-Amino-10-methylfolic Acid - 4-Amino-4-deoxy-10-methylpteroyl-L-glutamic Acid - Abitrexate - Alpha-Methopterin - Amethopterin - Amethopterin - Brimexate - CL 14377 - CL-14377 - Emtexate - Emthexat - Emthexate - Farmitrexat - Fauldexato - Folex - Folex - Folex PFS - Jylamvo - Lantarel - Ledertrexate - Lumexon - METHOTREXATE - MTX - Maxtrex - Medsatrexate - Metex - Methoblastin - Methotrexate LPF - Methotrexate Methylaminopterin - Methotrexatum - Metotrexato - Metrotex - Mexate - Mexate-AQ - N-[4-[[(2,4-Diamino-6-pteridinyl)methyl]methylamino]benzoyl]-L-glutamic Acid - Novatrex - Rheumatrex - Rheumatrex - Texate - Tremetex - Trexeron - Trixilem - WR-19039 - amethopterin - methotrexate