Journal
MOLECULAR BIOLOGY AND EVOLUTION
Volume 39, Issue 1, Pages -Publisher
OXFORD UNIV PRESS
DOI: 10.1093/molbev/msab279
Keywords
gut microbiome; butyrate; metabolism; human evolution
Funding
- Feinberg School of Medicine
- Center for Genetic Medicine
- Feinberg's Department of Biochemistry and Molecular Genetics
- Office of the Provost
- Office for Research
- Northwestern Information Technology
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Humans have shown resilience in the abundance and diversity of butyrate production pathways compared to nonhuman primates over evolutionary and modern times. This indicates an evolutionary shift in host-microbe interactions in humans, contributing to increased SCFA production to meet higher energy requirements.
Over the course of human evolution, shifts in dietary practices such as meat-eating and cooking, have resulted in reduced fiber intake, a trend that has been exaggerated more recently in industrialized populations. Reduced fiber consumption is associated with a loss of gut microbial taxa that degrade fiber, particularly butyrate. Therefore, this dietary shift in humans may have altered the abundance of microbial genes involved in butyrate production. This study uses a gene-targeted alignment approach to quantify the abundance of butyrate production pathway genes from published wild nonhuman primate and human gut metagenomes. Surprisingly, humans have higher diversity and relative abundances of butyrate production pathways compared with all groups of nonhuman primates except cercopithecoids. Industrialized populations of humans also differ only slightly in butyrate pathway abundance from nonindustrialized populations. This apparent resilience of butyrate production pathways to shifts in human diet across both evolutionary and modern populations may signal an evolutionary shift in host-microbe interactions in humans that increased SCFA production. Such a shift could have contributed to meeting the increased energy requirements of humans relative to nonhuman primates.
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