WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions, filtered to mechanism.
The most extensively referenced missing concept in this wiki. SCFAs -- acetate (C2), propionate (C3), and butyrate (C4) -- are the primary metabolic products of anaerobic bacterial fermentation of dietary fiber in the colon. They serve as the critical molecular link bet…
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
A selective semipermeable border formed by brain endothelial cells connected by tight junctions, pericytes, and astrocytic end-feet. The BBB restricts passage of most molecules from blood to brain, protecting the CNS from toxins, pathogens, and inflammatory mediators. M…
The most biologically potent short-chain fatty acid (C4). Butyrate is the primary energy source for colonocytes, a histone deacetylase (HDAC) inhibitor with broad epigenetic effects, and a key anti-inflammatory mediator. Its depletion -- driven by loss of butyrate-produ…
The collective ability of the resident gut microbiome to prevent colonization by exogenous pathogens and suppress expansion of resident pathobionts. Colonization resistance is not a property of any single organism but an emergent function of the whole microbial communit…
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
Disruption of the normal composition and metabolic function of microbial communities, particularly the gut microbiome. In the metallomics context, dysbiosis is both a consequence of metal toxicity and an amplifier of further disease -- creating vicious cycles where meta…
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
Bidirectional communication between the gut microbiota and the central nervous system, mediated by neural (vagus nerve, enteric nervous system), immune (cytokines, microglia), endocrine (HPA axis), and metabolic (SCFAs, neurotransmitter precursors, tryptophan metabolite…
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
Leptin is an adipokine (hormone produced by adipose tissue) that signals satiety to the hypothalamus — suppressing appetite and increasing energy expenditure. Leptin resistance (elevated leptin with impaired signaling) is a hallmark of obesity, paralleling insulin resis…
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
Small molecules produced, modified, or activated by gut microbiota that function as the primary chemical language between the microbiome and its host. These metabolites are not passive byproducts — they regulate gene expression, immune cell differentiation, gut barrier …
Microglia are the resident immune cells of the central nervous system, constituting 5-12% of all brain cells. They function as the brain's surveillance and defense system -- scanning for damage, clearing debris, pruning synapses during development, and mounting inflamma…
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
Non-digestible food substrates that selectively stimulate the growth and/or activity of beneficial gut microorganisms, conferring health benefits to the host. Distinct from probiotics (live organisms) and postbiotics (microbial metabolic products), prebiotics act as fue…
A three-carbon short-chain fatty acid (SCFA) produced primarily by Bacteroidetes and certain Firmicutes through anaerobic fermentation of dietary substrates. At physiological concentrations in healthy gut microbiomes, propionic acid (PPA) is a normal fermentation produc…
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
This knowledge-base record is being expanded from WikiBiome’s evidence graph.
Tau is a microtubule-associated protein essential for maintaining the structural integrity of neuronal axons. In health, tau binds to and stabilizes microtubules, enabling axonal transport of organelles, vesicles, and signaling molecules. When tau becomes hyperphosphory…
This knowledge-base record is being expanded from WikiBiome’s evidence graph.