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Published on: August 5, 2022
Antifolate inhibitors of thymidylate synthase as anticancer drugs
1Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur St., 02-093 Warszawa, Poland. a.jarmula@nencki.gov.pl
Abstract:
Inhibitors of thymidylate synthase (TS) play an essential role in the pharmacological management of several tumors. Two antifolates, Raltitrexed and Pemetrexed, are licensed anticancer drugs, with Pemetrexed, unlike Raltitrexed, undergoing further intense clinical development. Other antifolate TS inhibitors, recently/currently tested in clinical studies, that show encouraging anticancer activities are Plevitrexed, GW7904L and Nolatrexed. A new prospect among antifolates, demonstrating a very desirable pattern of pharmacological properties, is BGC 945 that showed promising antitumor activities and has been nominated for clinical development. In this paper, apart from reviewing their biochemical and pharmacological properties, up-to-date characteristics of clinical development of all the mentioned agents are presented. In addition, trends and perspectives for developing improved antifolate inhibitors of TS and future drugs are discussed. Drug resistance is the main barrier to more effective treatment of cancers with antifolates; therefore, mechanisms of antifolate resistance and currently applied approaches to overcome it are also pointed out in the review.
Insights
Anticancer drugs targeting thymidylate synthase (TS) are crucial for tumor treatment. This review details current antifolate TS inhibitors, their clinical development, and strategies to overcome drug resistance for improved cancer therapy.
Area of Science:
- Oncology
- Pharmacology
- Biochemistry
Background:
- Thymidylate synthase (TS) inhibitors are vital in cancer chemotherapy.
- Several antifolate TS inhibitors are approved or in clinical development.
Purpose of the Study:
- To review the biochemical and pharmacological properties of antifolate TS inhibitors.
- To present updated clinical development status of these agents.
- To discuss future perspectives and drug resistance mechanisms.
Main Methods:
- Literature review of antifolate TS inhibitors.
- Analysis of clinical trial data and pharmacological properties.
- Discussion of drug resistance mechanisms and overcoming strategies.
Main Results:
- Raltitrexed and Pemetrexed are licensed anticancer drugs, with Pemetrexed in further development.
- Plevitrexed, GW7904L, Nolatrexed, and BGC 945 show promising anticancer activities.
- Drug resistance remains a significant challenge in antifolate therapy.
Conclusions:
- Antifolate TS inhibitors represent a key therapeutic strategy for various cancers.
- Ongoing research focuses on developing improved agents and overcoming resistance.
- Understanding resistance mechanisms is crucial for advancing antifolate-based cancer treatment.
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