WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions.
Mis-metallation is the displacement of the correct metal cofactor from an enzyme or protein by a wrong metal ion, leading to loss of function, gain of aberrant function, or structural disruption. This is one of the most fundamental and pervasive mechanisms of metal toxi…
The most common form of dementia, affecting an estimated 55 million people worldwide and projected to triple by 2050 zhang 2024 recent advances alzheimers mechanisms trials. Characterized by progressive memory loss, cognitive decline, amyloid-beta plaques, and neurofibr…
Amyloid-beta (Aβ) is a 36–43 amino acid peptide derived from the proteolytic cleavage of amyloid precursor protein (APP) by beta-secretase (BACE1) and gamma-secretase. Its aggregation from soluble monomers into insoluble fibrillar plaques in the brain is the defining ne…
The process by which soluble amyloid-beta (Aβ) monomers assemble into neurotoxic oligomers and insoluble fibrillar plaques in the brain -- the defining neuropathological event of alzheimers disease. What distinguishes WikiBiome's treatment of this process from conventio…
Antimicrobial metals are metal ions and metal-based materials that kill or inhibit microorganisms. Copper, silver, zinc, and gallium are the principal agents, each exploiting different aspects of microbial metal biology. What makes this field particularly relevant to Wi…
Atherosclerosis is a chronic inflammatory disease of arterial walls characterized by lipid-laden plaque formation, endothelial dysfunction, and progressive vascular occlusion. It is the pathological substrate underlying coronary artery disease, stroke, and peripheral ar…
A neurodevelopmental condition affecting approximately 1 in 36 children (US CDC 2023 estimate), characterized by differences in social communication, restricted interests, and repetitive behaviors. From a metallomics perspective, ASD presents a compelling convergence of…
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…
The most abundant mineral in the human body, with ~99% stored in bones and teeth. Calcium's biological significance extends far beyond structural support -- it is the universal second messenger in cell signaling, controlling neurotransmitter release, muscle contraction,…
Cambialistic enzymes are enzymes that can function with more than one metal cofactor, switching between metals depending on environmental availability. The term derives from the Latin cambium ("exchange") and describes a remarkable adaptation: rather than being locked i…
Cardiovascular disease (CVD) -- encompassing atherosclerosis, coronary artery disease, hypertension, myocardial infarction, heart failure, and stroke -- is the leading cause of death globally. The gut-heart axis has emerged as a central paradigm linking microbial metabo…
Catalase is a heme-iron enzyme that decomposes hydrogen peroxide into water and oxygen. In microbial peroxide defense, it acts downstream of superoxide dismutase: superoxide dismutase converts superoxide to hydrogen peroxide, and catalase removes that hydrogen peroxide …
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, …
Colorectal cancer (CRC) is the third most common cancer worldwide and the second leading cause of cancer death. Over 90% of cases are sporadic, driven by a complex interplay between genetic predisposition, dietary habits, gut microbiome composition, and environmental ex…
An essential trace element with a striking dual nature: required for survival as a cofactor for critical enzymes (SOD1, cytochrome c oxidase, ceruloplasmin), yet toxic in excess through Fenton-like redox cycling and mis metallation of iron-sulfur clusters. Copper is ele…
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…
Depression is the most prevalent mental health disorder globally, affecting over 280 million people zhu 2025 microbiota gut brain axis depression review, and one of the most metal-sensitive conditions in this wiki. It sits at the convergence of nearly every pathway cata…
This page unifies the infant formula contamination, pregnancy complications, autism spectrum disorder, necrotizing enterocolitis, and neurodevelopmental toxicity threads around a single organizing insight: metal toxicity is disproportionately severe during specific deve…
lead (Pb) has no safe level of exposure. Unlike most dietary metals, lead does not play any known biological role — every atom absorbed represents toxic burden. While environmental lead exposure (paint, soil, air) has decreased dramatically since leaded gasoline phase-o…
The pathological disruption of normal metal homeostasis — the tightly regulated balance of essential trace elements (iron, zinc, copper, manganese, selenium, cobalt) and the effective exclusion of toxic metals (cadmium, lead, mercury, arsenic). Dyshomeostasis is a conve…
Endometriosis is a chronic estrogen-dependent inflammatory condition affecting approximately 10% of reproductive-age women, characterized by the growth of endometrial-like tissue outside the uterus colonetti 2023 gut vaginal microbiota endometriosis meta analysis. The c…
A group 13 post-transition metal (atomic number 31) with no known biological function in any organism — yet one of the most promising antimicrobial metals precisely because of what it cannot do. Ga3+ is nearly identical to Fe3+ in ionic radius (0.62 Å vs 0.645 Å) and co…
Gastroesophageal reflux disease (GERD) is a chronic condition in which stomach acid or bile flows back into the esophagus, causing mucosal damage and symptoms such as heartburn and regurgitation. Affecting approximately 20% of Western populations, GERD is conventionally…
Alphabetical definitions of specialist terms used throughout this wiki. Where a full concept page exists, the term links to it. --- AhR (aryl hydrocarbon receptor) -- A ligand-activated transcription factor that senses microbial metabolites (especially indoles from tryp…
The third nickel-dependent enzyme class in human pathogens, after urease and hydrogenase. Glyoxalase I detoxifies methylglyoxal, a reactive and toxic byproduct of glycolysis. While less well-known than urease or hydrogenase as a virulence factor, GloI is emerging as a s…
Graves' disease (GD) is an autoimmune thyroid disorder characterized by TSH receptor antibodies (TRAb) that stimulate the thyroid gland, causing hyperthyroidism kahaly 2022 graves disease targeted therapy review. It is the most common cause of hyperthyroidism, with conc…
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…
The most abundant transition metal in the human body and arguably the most consequential metal in biology. Iron sits at the center of a paradox that drives pathology across virtually every disease domain: organisms need it for oxygen transport, energy metabolism, DNA sy…
Iron-sulfur (Fe-S) clusters are among the most ancient and ubiquitous metal cofactors in biology, present in all domains of life. These inorganic prosthetic groups -- typically [2Fe-2S] or [4Fe-4S] configurations -- mediate electron transfer, enzymatic catalysis, and re…
A fundamental ordering of divalent transition metal ion binding affinities, established by Harry Irving and Robert Williams in 1953: Mg2+ < Mn2+ < Fe2+ < Co2+ < Ni2+ < Cu2+ Zn2+ This series holds for virtually all ligands and biological chelators. It means that copper b…
The labile metal pool (LMP) is the fraction of intracellular metal that is bioavailable -- loosely coordinated with small molecules, transiently protein-bound, or truly "free" in solution. This pool is vanishingly small (often <1 free atom per cell for zinc and copper) …
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…
Manganese is an essential trace element with a narrow therapeutic window: required as a cofactor for critical enzymes including Mn-SOD (SOD2), pyruvate carboxylase, arginase, and ribonucleotide reductase, yet profoundly neurotoxic at elevated levels martin 2022 manganes…
Chelation therapy uses molecules with high affinity for specific metal ions to form stable, excretable complexes, removing toxic metals from the body. The word derives from Greek "chele" (claw) -- the chelator grips the metal ion at multiple coordination sites. While ch…
Specialized proteins that escort metal ions from their point of entry to specific metalloenzyme targets, ensuring correct metalation in a cytoplasm crowded with competing metal-binding sites. Metallochaperones solve a fundamental problem in metal biology: how does the r…
Microbial metallomics is the study of how metals and microorganisms interact at the systems level — how metal availability shapes microbial communities, how microbes acquire and weaponize metals for virulence, and how this bidirectional metal-microbe interface drives di…
Multiple sclerosis (MS) is a chronic autoimmune demyelinating disease of the central nervous system, with a global prevalence of approximately 2.8 million attfield 2022 immunology ms nature review. The conventional framing centers on genetic susceptibility (HLA-DRB115:0…
Nakaseomyces glabratus is the current name for NCBITaxon:5478. Takashima and Sugita established the current combination in 2022 as MycoBank MB 843854; Candida glabrata is a homotypic synonym and former combination, while Cryptococcus glabratus H.W. Anderson 1917 is the …
A transition metal occupying a central position in this wiki's evidence base. Nickel is toxic and carcinogenic to humans, yet an essential cofactor for pathogen virulence enzymes. It is the most frequent contact allergen worldwide and drives a wide spectrum of systemic …
The strategy by which mammalian hosts withhold essential metals from invading pathogens to limit their growth. Well-established for iron and zinc; underexplored but potentially powerful for nickel.
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…
Ovarian cancer is the most lethal gynecological malignancy, with approximately 314,000 new cases and 207,000 deaths annually worldwide. Its poor prognosis stems largely from late-stage diagnosis (70% at stage III/IV) and the development of chemoresistance. From a metall…
The second most common neurodegenerative disease, affecting over 10 million people worldwide dorsey 2018 parkinsons incidence meta analysis. Characterized by progressive loss of dopaminergic neurons in the substantia nigra, alpha-synuclein aggregation (Lewy bodies), and…
A metabolic-endocrine disorder affecting 6-20% of reproductive-age women worldwide, characterized by hyperandrogenism, oligo/anovulation, and polycystic ovary morphology (Rotterdam criteria) barrea 2019 mediterranean diet pcos. PCOS is the leading cause of anovulatory i…
A severe neuropsychiatric disorder affecting approximately 1% of the global population, characterized by positive symptoms (hallucinations, delusions), negative symptoms (anhedonia, social withdrawal, flat affect), and cognitive deficits. Life expectancy is reduced by 1…
A non-essential metal with a 5,000-year history of antimicrobial use, silver has re-emerged as a critical tool in the post-antibiotic era. What makes silver particularly interesting from a metallomics perspective is not that it kills bacteria -- many metals do -- but ho…
Research summary -- not medical advice. This page synthesizes published research on why a commonly recommended intervention requires careful consideration in the context of cadmium exposure. Consult a qualified healthcare provider before making changes to supplementatio…
Superoxide dismutases are metalloenzymes that catalyze the dismutation of superoxide radical (O2-) into hydrogen peroxide (H2O2) and molecular oxygen -- the first line of defense against oxidative damage in all aerobic organisms. What makes SOD uniquely important in mic…
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 …
Vitamin B12 (cobalamin) is an essential cobalt-containing cofactor required for homocysteine metabolism, methylation reactions, and neurological function. Its core corrin ring chelates a cobalt ion, placing B12 at the intersection of metallomics and microbial ecology. C…
Zinc is the most widely utilized transition metal cofactor in biology. Approximately 9-10% of the eukaryotic proteome and 5-6% of the bacterial proteome consists of zinc-binding proteins capdevila 2024 bacterial metallostasis sensing trafficking. An estimated one-third …
Zinc supplementation addresses the functional zinc deficiency in ASD caused by toxic metal displacement at binding sites. Lead, mercury, and cadmium enter cells via calcium channels and displace zinc from critical enzymes and structural proteins (Primitive 3: mis-metall…