WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions.
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 …
Progressive inflammatory disease of the arterial wall characterized by lipid accumulation, immune cell infiltration, and fibrous plaque formation. In the metallomics framework, atherosclerosis sits at the convergence of three interacting systems: heavy metal toxicity, g…
Autophagy (from Greek, "self-eating") is the cellular process of degrading and recycling damaged organelles, misfolded proteins, and intracellular pathogens through lysosomal digestion. It is the cell's primary quality control mechanism -- a housekeeping system that bec…
A class of Gram-negative bacteria within the phylum Proteobacteria that has emerged as a causal risk factor for schizophrenia and bipolar disorder through Mendelian randomization studies. Betaproteobacteria includes genera with notable metal tolerance -- particularly wi…
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…
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…
An opportunistic fungal pathogen whose relationship with metals is multifaceted: C. albicans can biosorb heavy metals from its environment, heavy metal exposure promotes its virulence in immunocompromised hosts, and metal nanoparticles are being developed as antifungal …
Chelation therapy uses high-affinity metal-binding molecules to form stable, excretable complexes with toxic metals, removing them from the body. The term derives from Greek "chele" (claw) -- the chelator grips the metal ion at multiple coordination sites. While chelati…
Christensenellaceae is a family of Gram-negative, strictly anaerobic bacteria within the order Clostridiales (phylum Firmicutes) that has emerged as one of the most consistently health-associated and heritable members of the human gut microbiome. First formally describe…
Chromium is a transition metal (atomic number 24) whose toxicology is defined by a stark oxidation-state divide. Hexavalent chromium, Cr(VI), is an IARC Group 1 human carcinogen that causes DNA damage through a unique mechanism of intracellular reduction and ternary add…
A progressive loss of kidney function affecting approximately 850 million people worldwide (10–14% of adults), causing 1.2 million deaths annually. CKD is unique among diseases in this wiki because it occupies both sides of the metal-disease equation: heavy metals (Cd, …
arsenic (As) is unique among dietary heavy metals because it exists in two fundamentally different forms with dramatically different toxicities: inorganic arsenic (iAs, the dangerous form) and organic arsenic (arsenobetaine, arsenosugars — largely non-toxic). Understand…
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…
Ethylenediaminetetraacetic acid (EDTA) is a synthetic aminopolycarboxylic acid widely used as a chelation agent for heavy metal poisoning, particularly lead. In the microbiome context, EDTA is significant for two reasons: its therapeutic use in metal detoxification and …
Exogenous chemicals that interfere with hormone synthesis, secretion, transport, binding, or elimination, mimicking or blocking endogenous hormones at physiologically relevant concentrations. In the metallomics-microbiome framework, endocrine disruptors occupy a critica…
This page addresses the practical question: how do toxic metals get into people? Metal toxicology research identifies the mechanisms of harm, but understanding exposure routes -- dietary, occupational, environmental, and consumer product-mediated -- is essential for pre…
Epigenetic modifications — heritable changes in gene expression without altering the DNA sequence — are a primary mechanism through which both heavy metals and the gut microbiome influence disease across the lifespan. The three major epigenetic mechanisms (DNA methylati…
Epigenetics is the study of heritable changes in gene expression that occur without alterations to the DNA sequence itself. These changes -- primarily DNA methylation, histone modifications, and non-coding RNA regulation -- represent a molecular memory system that can b…
Affects approximately 48 million women worldwide (WHO global infertility prevalence estimates). From a microbiome-metallomics perspective, female infertility sits at the intersection of the estrobolome (microbial estrogen metabolism), heavy metal reproductive toxicity (…
Ferroptosis is a form of iron-dependent regulated cell death driven by the accumulation of lipid peroxides on cellular membranes pendergrass 2026 microbial metallomics parkinsons ferroptosis, riederer 2021 iron concert master parkinsons. Unlike apoptosis or necrosis, fe…
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…
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 …
heavy metals exert some of their most devastating effects on the nervous system. lead, mercury, and arsenic are the three metals with the most extensively documented neurotoxic mechanisms, but cadmium, manganese, aluminum, and nickel also contribute to neurological dama…
Heavy metals is a widely used but chemically imprecise umbrella term for elements discussed because of their density, persistence, environmental occurrence, or toxicity. One common convention uses density above 5 g/cm3, but density alone does not determine biological ha…
The 6-24 month developmental window — when infants transition from breast milk to solid foods — represents a convergence of maximum vulnerability and maximum exposure. Immature detoxification systems, rapid organ development, and high food-to-body-weight ratios mean tha…
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…
Hyperaccumulator plants are species that concentrate heavy metals in their tissues at 10–100× the levels found in non-accumulating species growing in the same soil. Over 700 plant species are known hyperaccumulators — primarily for nickel (~530 species), but also zinc, …
Hyperparathyroidism is the overproduction of parathyroid hormone (PTH), a master regulator of calcium homeostasis. While primary hyperparathyroidism (from parathyroid adenoma) is well described, the WikiBiome framework highlights secondary hyperparathyroidism -- the com…
Sustained elevation of systemic blood pressure, affecting an estimated 1.3 billion adults worldwide and the leading modifiable risk factor for cardiovascular disease, stroke, and chronic kidney disease. The gut microbiome-blood pressure axis has emerged as a major resea…
Interleukin-1 beta (IL-1β) is a master pro-inflammatory cytokine and the primary product of the NLRP3 inflammasome. Unlike IL-6 and TNF-alpha (which are transcriptionally regulated by nf kappa b), IL-1β requires a two-step activation: (1) NF-kB-driven transcription of p…
A genus of Gram-positive, facultatively anaerobic lactic acid bacteria (LAB) that are among the most extensively studied probiotics. In the metallomics context, Lactobacillus species are critical for two reasons: they actively detoxify heavy metals through binding and s…
Lead is a purely toxic heavy metal with no known biological function. It is the most extensively studied metal in relation to neurodevelopmental harm and is increasingly recognized as a contributor to chronic disease across virtually every organ system, even at levels o…
Mercury is the most toxic heavy metal with no known biological function. Its organic form -- methylmercury (MeHg) -- is the primary concern for dietary exposure via fish consumption. Mercury's toxicity centers on thiol group binding, glutathione depletion, and blood-bra…
Inflammation is a broad concept, but in the metallomics context it has a specific character: heavy metals and pathogens activate overlapping inflammatory pathways, creating convergent pathology where distinguishing the metal contribution from the microbial contribution …
A family of small (6-7 kDa), cysteine-rich proteins that bind heavy metals with extraordinary affinity. Metallothioneins (MTs) are the cell's primary chemical defense against metal toxicity -- they sequester cadmium, mercury, lead, and other toxic metals, preventing the…
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…
N-acetylcysteine (NAC) is the acetylated form of the amino acid L-cysteine and serves as the rate-limiting precursor for glutathione synthesis — the body's primary intracellular antioxidant and a critical cofactor for phase II detoxification of heavy metals. In the micr…
Nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB) is a family of transcription factors that regulate inflammation, immune responses, cell survival, and proliferation. NF-kB is a convergence point where metal toxicity, pathogen signaling, and chronic…
Nitric oxide (NO) is a gaseous signaling molecule with roles spanning vasodilation, immune defense, neurotransmission, and gut barrier maintenance. In the microbiome context, NO sits at the intersection of host physiology and microbial metabolism — gut bacteria both pro…
The NLRP3 inflammasome is a host innate-immune signaling complex that connects cellular danger signals to caspase-1 activation. In the canonical pathway represented in WikiBiome's evidence vault, caspase-1 processes the inflammatory cytokines IL-1beta and IL-18 and clea…
A chronic metabolic condition affecting over 1 billion people globally, characterized by excess adipose tissue accumulation, systemic low-grade inflammation, and gut microbiome disruption pendergrass 2026 heavy metals obesity epidemic. From a metallomics perspective, ob…
A family of Gram-positive obligate anaerobes (formerly classified as the genus Oscillospira, now reclassified into Oscillibacter and related genera within Oscillospiraceae) that serve as keystone butyrate producers in the healthy human distal colonic microbiota (Konikof…
Live microorganisms that, when administered in adequate amounts, confer a health benefit on the host. In the context of this wiki, probiotics are relevant both as therapeutic agents for metal-related diseases and as mediators of gut metal microbiome interactions. Their …
Psoriasis is a chronic, immune-mediated inflammatory skin disease characterized by keratinocyte hyperproliferation, resulting in well-demarcated erythematous plaques with silvery scales. Affecting approximately 2-3% of the global population, psoriasis is now understood …
Rheumatoid arthritis (RA) is a chronic systemic autoimmune disease characterized by symmetric polyarthritis with progressive joint destruction, affecting approximately 1% of the global population. The conventional framing centers on genetic susceptibility (HLA-DRB1 shar…
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…
The primary androgen in human biology, testosterone sits at a critical intersection in WikiBiome's framework: it is both regulated by the gut microbiome and disrupted by heavy metals, making it a node where environmental metal exposure, microbial ecology, and endocrine …
Uremic toxins are metabolic waste products that accumulate in the blood when kidney function declines. A striking proportion of the most clinically significant uremic toxins are produced not by human metabolism but by the gut microbiome -- making the gut-kidney axis a c…