WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions, filtered to defense.
Reactive oxygen species — superoxide (O2•−), hydrogen peroxide (H2O2), and hydroxyl radical (OH•) — are chemically reactive molecules generated during normal metabolism and massively amplified by heavy metal exposure. ROS are both weapons (the host uses them to kill pat…
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…
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…
Cysteine is a sulfur-containing amino acid whose thiol (-SH) group makes it the primary metal-binding residue in biology. It is the rate-limiting precursor for glutathione (the master intracellular antioxidant), a key residue in metallothioneins (metal-binding proteins)…
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…
The most abundant intracellular thiol and the master antioxidant of mammalian cells. Glutathione is a tripeptide (gamma-glutamyl-cysteinyl-glycine) whose sulfhydryl (-SH) group makes it both a critical antioxidant and a primary target for heavy metal binding. GSH deplet…
The master regulator of systemic iron homeostasis. Hepcidin is a 25-amino-acid peptide hormone produced primarily by hepatocytes that controls iron absorption, recycling, and distribution by binding to and degrading ferroportin (SLC40A1/FPN) -- the only known cellular i…
Interferon gamma (IFN-γ) is the signature Th1 cytokine and the primary activator of macrophage antimicrobial functions. In the WikiBiome framework, IFN-γ is critical for two reasons: it drives nutritional immunity (iron restriction against intracellular pathogens) and i…
Innate immunity is the body's first-line, non-specific defense against pathogens — comprising physical barriers (epithelium, mucus), antimicrobial molecules (calprotectin, lactoferrin, defensins), pattern recognition receptors (TLRs, NOD-like receptors), and phagocytic …
Microbial communities do not acquire and use metals in isolation. Within biofilms, polymicrobial infections, and the gut microbiome, microbes engage in complex cooperative and competitive relationships mediated by metals -- sharing metallophores, concentrating metals in…
Transition metals serve as essential cofactors for pathogen virulence factors across virtually all domains of microbial life. The dependence of pathogens on metals they must scavenge from the host environment creates a fundamental tension at the heart of infectious dise…
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…
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…
Small, high-affinity iron-chelating molecules secreted by bacteria and fungi to scavenge ferric iron (Fe3+) from the environment. Siderophore competition is a fundamental ecological force in the gut microbiome: organisms with superior iron acquisition systems gain a dec…
Siderophores are small, high-affinity iron-chelating molecules secreted by bacteria, fungi, and some plants to scavenge ferric iron (Fe3+) from their environment. In the context of infection, siderophores are the molecular weapons pathogens deploy to break through nutri…
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…