Bacterial vitamin B6 is required for post-embryonic development in C. elegans

Area of Science:

• Microbiology
• Developmental Biology
• Nutritional Science

Background:

• Nutritional intake is critical for animal growth, reproduction, and survival.
• Nutrient deficiency can trigger developmental arrest as a survival mechanism.
• The specific nutrients and sensing mechanisms for recovery from arrest are not fully understood.

Purpose of the Study:

• Investigate developmental arrest in Caenorhabditis elegans fed Lactiplantibacillus plantarum.
• Identify microbial factors from Escherichia coli that rescue this arrested state.
• Elucidate the role of specific nutrients and host-microbe interactions in postembryonic development.

Main Methods:

• Genome-wide screen of 3983 E. coli gene deletion mutants.
• Supplementation experiments with L. plantarum-fed C. elegans.
• Transcriptome analysis to understand host-microbe metabolic coordination.

Main Results:

• Identified essential E. coli genes for C. elegans growth on L. plantarum.
• Confirmed E. coli pdxH and its metabolite pyridoxal 5-P (PLP, Vitamin B6) as crucial for development.
• Transcriptome data suggests bacterial pdxH influences host metabolism and PLP binding.

Conclusions:

• Microbial Vitamin B6 (PLP) is a vital cofactor for restoring C. elegans postembryonic development after nutritional arrest.
• The developmental arrest induced by L. plantarum is independent of FoxO/DAF-16.
• Highlights the importance of microbial metabolites in host development.