WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions.
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that functions as a master sensor at the intersection of gut microbial metabolism, environmental chemical exposure, and immune regulation. It is expressed broadly across immune cells, intesti…
A Gram-negative, obligate anaerobic, mucin-degrading bacterium that colonizes the intestinal mucus layer and has emerged as one of the most important next-generation probiotics. A. muciniphila is consistently depleted in disease states associated with metal dyshomeostas…
Anaerotruncus is a Gram-positive obligate anaerobic genus within the Ruminococcaceae (Firmicutes). First isolated from human feces, it is a minor member of the healthy gut community that has attracted attention for its consistent enrichment in aging-related conditions a…
Arsenic is a metalloid and potent carcinogen (IARC Group 1) that ranks among the most widespread environmental toxicants affecting human health. An estimated 225 million people worldwide are chronically exposed through contaminated drinking water alone ghosh 2023 heavy …
This page serves as a cross-reference point for the existing ahr concept page, which provides comprehensive coverage of AhR signaling, microbiome-derived ligands, and immune regulation. The aryl hydrocarbon receptor is a ligand-activated transcription factor that integr…
Aspirin (acetylsalicylic acid) is a non-steroidal anti-inflammatory drug (NSAID) that irreversibly inhibits cyclooxygenase (COX) enzymes, suppressing prostaglandin synthesis. While widely used as an antiplatelet and anti-inflammatory agent, aspirin carries significant i…
Autoimmunity occurs when the immune system attacks the body's own tissues. What has emerged over the past two decades is that the gut microbiome is not merely associated with autoimmune disease -- it is a mechanistic driver of immune tolerance breakdown. Metals add a se…
Bacteremia is the presence of viable bacteria in the bloodstream. In the WikiBiome framework, bacteremia results from bacterial translocation across compromised barriers — the gut epithelium (→ portal bacteremia) or the oral mucosa (→ systemic bacteremia during dental p…
Bacteroides thetaiotaomicron is one of the most abundant and metabolically versatile commensals of the human gut, routinely cited as a model organism for studying host-microbe symbiosis. Its genome was one of the first human gut bacterial genomes fully sequenced, and su…
Butyrate is a four-carbon short-chain fatty acid produced when anaerobic gut microorganisms ferment dietary substrates. In the colon, it participates in epithelial energy metabolism, barrier maintenance, immune signaling, and gene regulation. Its effects depend on conce…
Cadmium is a toxic non-essential heavy metal (IARC Group 1 carcinogen) with a biological half-life of 17--30 years in mammals, primarily accumulating in the renal cortex via proximal tubular reabsorption of the Cd-metallothionein complex rasin 2025 cadmium exposure heal…
Celiac disease is a chronic autoimmune condition triggered by dietary gluten (gliadin proteins from wheat, barley, and rye) in genetically susceptible individuals (HLA-DQ2/DQ8, carried by ~30-40% of Europeans but penetrant in only ~1% of carriers). Gluten exposure cause…
A chronic, relapsing-remitting inflammatory bowel disease (IBD) characterized by transmural inflammation of the gastrointestinal tract, most commonly affecting the terminal ileum and colon but capable of involving any segment from mouth to anus zhang 2017 intestinal mic…
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…
Endotoxemia is the presence of bacterial endotoxin (lipopolysaccharide, LPS) in the bloodstream. Metabolic endotoxemia — chronic, low-grade LPS translocation from the gut — is a central mechanism linking dysbiosis to systemic disease across dozens of conditions in this …
Gut barrier dysfunction -- colloquially "leaky gut" -- is the pathological increase in intestinal permeability that permits translocation of bacteria, bacterial products (LPS, peptidoglycan), metals, and dietary antigens from the gut lumen into the systemic circulation.…
The relationship between heavy metals and the gut microbiota is bidirectional: metals reshape microbial community composition and metabolic output, while the microbiota modulates metal absorption, speciation, and toxicity. The gut microbiota serves as the first line of …
HIV (Human Immunodeficiency Virus) causes progressive CD4+ T cell depletion leading to AIDS. In the WikiBiome framework, HIV is notable for the gut-centric model of disease progression: HIV preferentially destroys gut-associated lymphoid tissue (GALT) early in infection…
An umbrella term for chronic relapsing-remitting inflammatory conditions of the gastrointestinal tract, principally crohns disease (CD; transmural, any GI segment) and ulcerative colitis (UC; mucosal, colon only). Approximately 6 million patients worldwide. IBD represen…
The intestinal epithelium is a single-cell-thick barrier separating the lumen -- home to trillions of microbes and ingested metals -- from the systemic circulation. When this barrier fails, the consequences cascade: microbial products translocate, metals gain unrestrict…
A functional gastrointestinal disorder affecting 10-15% of the global population, characterized by chronic abdominal pain, bloating, and altered bowel habits (diarrhea-predominant, constipation-predominant, or mixed) without identifiable structural pathology. From a met…
Pancreatitis is inflammation of the pancreas, occurring in acute (AP) and chronic (CP) forms. Acute pancreatitis ranges from mild self-limiting disease to severe necrotizing pancreatitis with 20-30% mortality. Chronic pancreatitis is a risk factor for pancreatic cancer …
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…
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.
Toll-like receptors (TLRs) are a family of pattern recognition receptors (PRRs) that form the front line of the innate immune system. They detect conserved molecular patterns from microbes -- pathogen-associated molecular patterns (PAMPs) -- and damage-associated molecu…
Type 1 diabetes is an autoimmune disease in which immune-mediated destruction of insulin-producing beta cells in the pancreatic islets of Langerhans leads to lifelong insulin dependence. T1D is fundamentally distinct from type 2 diabetes, which is characterized by insul…
Type 2 diabetes (T2D) is a metabolic disease characterized by insulin resistance and progressive beta-cell dysfunction, affecting over 500 million people worldwide (IDF Diabetes Atlas 2021). The conventional framing centers on caloric excess and sedentary behavior. The …
A chronic inflammatory bowel disease characterized by continuous mucosal inflammation of the colon, extending proximally from the rectum. Unlike crohns disease, UC is limited to the colon, affects only the mucosa/submucosa (not transmural), produces no skip lesions, and…