The Critical Function of microRNAs in Developing Resistance against 5- Fluorouracil in Cancer Cells

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Cancer remains a leading cause of death globally due to treatment resistance and recurrence.
• 5-fluorouracil (5-FU) is a widely used antimetabolite chemotherapy agent effective against various cancers.
• 5-FU exerts cytotoxic effects by inhibiting thymidylate synthase and incorporating metabolites into nucleic acids, but drug resistance limits its clinical application.

Purpose of the Study:

• To review the critical role of microRNAs (miRNAs) in the development of 5-FU drug resistance in cancer.
• To elucidate the mechanisms by which miRNAs contribute to 5-FU resistance.
• To highlight the potential of targeting miRNAs for overcoming 5-FU resistance in cancer therapy.

Main Methods:

• Literature review of studies investigating microRNAs and 5-FU resistance.
• Analysis of research on miRNA expression patterns in 5-FU resistant cancer cells.
• Examination of the functional impact of specific miRNAs on 5-FU sensitivity.

Main Results:

• Alterations in miRNA expression are frequently observed in 5-FU resistant cancers.
• Specific miRNAs can either promote or suppress 5-FU resistance through various molecular pathways.
• miRNAs regulate key genes involved in 5-FU metabolism, drug efflux, and DNA repair.

Conclusions:

• MicroRNAs are significant modulators of 5-FU drug resistance in diverse cancer types.
• Understanding miRNA-mediated resistance mechanisms offers novel therapeutic strategies.
• Targeting specific miRNAs may enhance the efficacy of 5-FU chemotherapy and improve patient outcomes.