Which medications in the drug class Antineoplastics, Antimetabolite are used in the treatment of Urothelial Tumors of the Renal Pelvis and Ureters?

Updated: Aug 07, 2020
  • Author: Kyle A Richards, MD, FACS; Chief Editor: Bradley Fields Schwartz, DO, FACS  more...
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Answer

Antineoplastics, Antimetabolite

These agents inhibit cell growth and proliferation. They interfere with DNA synthesis by blocking the methylation of deoxyuridylic acid.

Methotrexate

Methotrexate inhibits dihydrofolate reductase (DHFR), causing a block in the reduction of dihydrofolate to tetrahydrofolate. This inhibits the formation of thymidylate and purines and arrests DNA, RNA, and protein synthesis. It is one of the components in the MVAC regimen and is used for the treatment of urothelial carcinoma. 

Gemcitabine (Gemzar)

Gemcitabine is a pyrimidine analog. After intracellular metabolism to its active nucleotide, it inhibits ribonucleotide reductase and competes with deoxycytidine triphosphate for incorporation into DNA. Gemcitabine is used in combination with cisplatin is the preferred perioperative chemotherapy regimen for urothelial cancer.


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