Gut bacteria make hidden fat molecules linked to diabetes risk
Deleray V, Charron-Lamoureux V, Vittali K, Mannochio-Russo H, Wang CX
Microbiome
The soil microbes you nurture in your compost pile and garden beds work by the same logic as the gut bacteria in this study, building useful chemical signals that science is only now learning to detect.
Researchers made nearly 450 synthetic versions of a family of molecules called 3-hydroxy N-acyl amides, which gut bacteria produce but which chemists had never cataloged well enough to recognize in real samples. Using these synthetic references like a fingerprint kit, they scanned tens of thousands of existing lab datasets and found these molecules everywhere, in human spit, stool, and skin, as well as in microbial, plant, and animal samples worldwide. Some of these molecules showed different levels in people with diabetes, suggesting gut bacteria chemistry may quietly influence human metabolic health.
Key Findings
Researchers synthesized 436 reference MS/MS spectra for 3-hydroxy N-acyl amides, a lipid class largely missing from existing spectral libraries.
This resource matched 161,626 spectra across 54,744 public metabolomics datasets, uncovering 334 previously unreported biological occurrences of these molecules.
Cultured human gut bacteria produced four of these compounds directly, and several showed altered abundance in people with diabetes mellitus.
chevron_right Technical Summary
Scientists built a library of nearly 450 chemical signatures for a little-known class of fatty molecules made by gut bacteria, then used it to spot over 100,000 instances of these compounds hiding in existing public health data, including in human saliva, stool, and skin, and found some change in people with diabetes.
Abstract Preview
Original paper
Synthesis-driven reverse metabolomics reveals 3-hydroxy N-acyl amides as gut microbial molecules.
3-Hydroxy N-acyl amides are bioactive lipids with reported anti-obesity and glucose-regulating effects, yet they are rarely detected in untargeted metabolomics studies because they are largely abse...
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