Skip to main content
eScholarship
Open Access Publications from the University of California

UC San Diego

UC San Diego Previously Published Works bannerUC San Diego

Dietary serine-microbiota interaction enhances chemotherapeutic toxicity without altering drug conversion.

  • Author(s): Ke, Wenfan
  • Saba, James A
  • Yao, Cong-Hui
  • Hilzendeger, Michael A
  • Drangowska-Way, Anna
  • Joshi, Chintan
  • Mony, Vinod K
  • Benjamin, Shawna B
  • Zhang, Sisi
  • Locasale, Jason
  • Patti, Gary J
  • Lewis, Nathan
  • O'Rourke, Eyleen J
  • et al.
Abstract

The gut microbiota metabolizes drugs and alters their efficacy and toxicity. Diet alters drugs, the metabolism of the microbiota, and the host. However, whether diet-triggered metabolic changes in the microbiota can alter drug responses in the host has been largely unexplored. Here we show that dietary thymidine and serine enhance 5-fluoro 2'deoxyuridine (FUdR) toxicity in C. elegans through different microbial mechanisms. Thymidine promotes microbial conversion of the prodrug FUdR into toxic 5-fluorouridine-5'-monophosphate (FUMP), leading to enhanced host death associated with mitochondrial RNA and DNA depletion, and lethal activation of autophagy. By contrast, serine does not alter FUdR metabolism. Instead, serine alters E. coli's 1C-metabolism, reduces the provision of nucleotides to the host, and exacerbates DNA toxicity and host death without mitochondrial RNA or DNA depletion; moreover, autophagy promotes survival in this condition. This work implies that diet-microbe interactions can alter the host response to drugs without altering the drug or the host.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View