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Updated: Jun 13, 2026

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C. elegans as a model for inter-individual variation in metabolism.

Bennett W Fox1, Olga Ponomarova2, Yong-Uk Lee2

  • 1Boyce Thompson Institute and Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA.

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Summary

Differences in metabolism arise from genetics and environment. This study in C. elegans reveals novel metabolites and a new pathway linked to genetic variation in HPHD-1, improving metabolic models.

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Area of Science:

  • Metabolomics
  • Genetics
  • Systems Biology

Background:

  • Individual metabolic differences stem from genetic, nutritional, and environmental factors.
  • Understanding these differences in humans is challenging due to lifestyle variability.
  • Caenorhabditis elegans offers a model to study inter-individual metabolic variation.

Purpose of the Study:

  • To investigate inter-individual metabolic variation using C. elegans.
  • To identify novel metabolites and their underlying genetic basis.
  • To develop more accurate metabolic network models reflecting species diversity.

Main Methods:

  • Comparative metabolomic analysis of wild and laboratory C. elegans strains.
  • Identification and characterization of previously undescribed metabolites (3HP-AAs).
  • Genetic analysis to link metabolite accumulation to specific gene variations (HPHD-1).

Main Results:

  • Significant differences in known and novel metabolite abundances were observed between C. elegans strains.
  • Novel metabolites, 3-hydroxypropionate amino acid conjugates (3HP-AAs), were found at higher levels in one wild strain.
  • Increased 3HP-AA accumulation was attributed to genetic variation in the HPHD-1 gene.

Conclusions:

  • A novel 'shunt-within-a-shunt' metabolic pathway producing 3HP-AAs was identified.
  • This pathway accommodates reduced function in the HPHD-1 gene.
  • The findings advance the development of individual-specific metabolic models.