https://blackmould.me.uk/assets/ToxinsCyclopiazonicAcid-lC2Vg7gq.js

1import{j as e,S as s,H as n,L as i,a,b as o,C as t}from"./index-BHiDqUWv.js";import{B as r}from"./badge-B2rFUfXq.js";import{P as l,F as c,R as d}from"./RelatedPages-CrEPd7Eg.js";import{t as u}from"./toxins-hero-DCxuuADN.js";import{T as m}from"./triangle-alert-M8h4OhwM.js";import"./chevron-right-DmJilnCI.js";const b=()=>e.jsxs(s,{children:[e.jsxs(n,{children:[e.jsx("title",{children:"Cyclopiazonic Acid (CPA) — Calcium-Disrupting Mycotoxin in Buildings | ToxicBlackMould"}),e.jsx("meta",{name:"description",content:"Cyclopiazonic acid (CPA) disrupts calcium regulation in cells, damaging liver, kidneys and muscles. Produced by Aspergillus and Penicillium in damp buildings. Learn about health effects and protection."})]}),e.jsxs("div",{className:"container py-8 max-w-4xl",children:[e.jsx(l,{items:[{label:"Mould Toxins",href:"/toxins"},{label:"Cyclopiazonic Acid"}]}),e.jsxs("div",{className:"relative rounded-lg overflow-hidden mb-10",children:[e.jsx("img",{src:u,alt:"Cyclopiazonic acid mycotoxin analysis from indoor mould samples",className:"w-full h-56 object-cover",width:1280,height:512}),e.jsx("div",{className:"absolute inset-0 bg-gradient-to-t from-primary/80 to-transparent"}),e.jsxs("div",{className:"absolute bottom-0 left-0 p-6 text-primary-foreground",children:[e.jsx(r,{className:"bg-accent text-accent-foreground mb-2",children:"Mould Toxins"}),e.jsx("h1",{className:"text-3xl lg:text-4xl font-bold",children:"Cyclopiazonic Acid — Disrupting Your Cells from Within"})]})]}),e.jsxs("div",{className:"prose prose-lg max-w-none mb-10",children:[e.jsxs("p",{children:["Cyclopiazonic acid (CPA) is a mycotoxin with a unique and insidious mechanism of action — it disrupts ",e.jsx("strong",{children:"calcium homeostasis"})," within cells. Since calcium signalling controls virtually every cellular process, from muscle contraction to nerve impulse transmission to immune cell activation to enzyme regulation, CPA's effects are far-reaching and touch multiple organ systems simultaneously. It's produced by several ",e.jsx(i,{to:"/hazardous/aspergillus",className:"text-accent hover:underline",children:"Aspergillus"})," species (A. flavus, A. tamarii, A. oryzae) and Penicillium species (P. camemberti, P. commune, P. griseofulvum) commonly found in indoor environments across the UK."]}),e.jsx("p",{children:"What makes CPA particularly noteworthy among indoor mycotoxins is its dual significance — it is both a genuine health concern and a valuable scientific research tool. Its exquisitely specific mechanism has made it indispensable in cell biology laboratories worldwide, which means we understand exactly how it damages cells at the molecular level. This detailed mechanistic knowledge, combined with the prevalence of its producer species in damp buildings, makes CPA a toxin that deserves more attention than it typically receives."}),e.jsx("h2",{children:"How Does Cyclopiazonic Acid Work at the Molecular Level?"}),e.jsxs("p",{children:["CPA is a specific and potent inhibitor of ",e.jsx("strong",{children:"SERCA (sarco/endoplasmic reticulum Ca²⁺-ATPase)"})," — the calcium pump responsible for moving calcium ions from the cytoplasm back into the endoplasmic reticulum (ER) for storage. This pump is essential for maintaining the precise calcium gradients that cells depend on for normal function. When CPA blocks SERCA, a cascade of cellular disruption follows:"]}),e.jsxs("ul",{children:[e.jsxs("li",{children:[e.jsx("strong",{children:"Cytoplasmic calcium overload"})," — calcium that should be pumped back into storage floods the cytoplasm, triggering inappropriate activation of calcium-dependent enzymes including proteases (calpains), phospholipases, and endonucleases that damage proteins, membranes, and DNA respectively"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Muscle dysfunction"})," — skeletal and smooth muscle cells depend on rapid calcium cycling for contraction and relaxation. When SERCA is blocked, muscles cannot relax properly, leading to spasms, cramps, and progressive weakness"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Disrupted nerve signalling"})," — neurons use calcium influx as a critical step in neurotransmitter release. Calcium dysregulation affects both central and peripheral nervous system function, leading to tremors and altered reflexes"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Cell death pathway activation"})," — prolonged calcium overload triggers the mitochondrial permeability transition, releasing cytochrome c and initiating the apoptotic (programmed cell death) cascade"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"ER stress and unfolded protein response"})," — the endoplasmic reticulum requires calcium for proper protein folding. Depletion of ER calcium stores triggers the unfolded protein response 

1(UPR), leading to inflammation, reduced protein synthesis, and potentially cell death if the stress is prolonged"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Impaired immune signalling"})," — T-cell activation, B-cell antibody production, and macrophage function all depend on precise calcium signalling. CPA-induced calcium disruption can suppress immune responses at multiple levels"]})]}),e.jsx(a,{className:"border-accent/50 bg-accent/5 my-6",children:e.jsx(o,{className:"pt-6",children:e.jsxs("div",{className:"flex gap-3",children:[e.jsx(m,{className:"h-6 w-6 text-accent flex-shrink-0 mt-1"}),e.jsxs("div",{children:[e.jsx("h3",{className:"font-semibold text-lg mb-2",children:"A Research Tool That's Also a Dangerous Toxin"}),e.jsx("p",{className:"text-muted-foreground mb-0",children:"CPA's highly specific inhibition of SERCA has made it one of the most widely used pharmacological tools in cell biology — scientists use it daily in laboratories worldwide to study calcium signalling, ER stress, apoptosis, and muscle physiology. This extensive scientific use means we understand CPA's mechanism of action better than almost any other mycotoxin. The irony is that while researchers handle CPA with strict safety protocols, building occupants may be chronically inhaling it from mould-contaminated walls without any awareness."})]})]})})}),e.jsx("h2",{children:"Health Effects of Cyclopiazonic Acid Exposure"}),e.jsx("p",{children:"The health effects of CPA exposure are well documented from animal studies and the limited human poisoning cases on record:"}),e.jsxs("ul",{children:[e.jsxs("li",{children:[e.jsx("strong",{children:"Gastrointestinal damage"})," — the GI tract is highly sensitive to CPA because its rapidly dividing epithelial cells are vulnerable to calcium-mediated cell death. Symptoms include nausea, vomiting, diarrhoea, and abdominal pain. In severe cases, intestinal necrosis has been observed in animal models"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Liver toxicity"})," — the liver accumulates CPA and shows dose-dependent damage including hepatocyte swelling, fatty degeneration, and focal necrosis. Liver enzyme elevations (ALT, AST) are consistent findings in animal studies"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Kidney damage"})," — renal tubular necrosis occurs at higher doses, with the proximal tubules being most affected. Kidney accumulation of CPA is second only to the liver"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Muscle weakness and wasting"})," — disrupted calcium cycling impairs muscle contraction and relaxation. Chronic exposure can lead to progressive skeletal muscle degeneration"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Neurological effects"})," — tremors, hyperexcitability, opisthotonus (severe arching of the back), and convulsions have been observed in animal studies at higher doses. These effects are consistent with disrupted neuronal calcium signalling"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Immunosuppression"})," — impaired calcium signalling in immune cells reduces T-cell proliferation, antibody production, and macrophage phagocytosis, increasing susceptibility to infections"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Cardiac effects"})," — at higher exposures, cardiac muscle calcium handling is disrupted, potentially causing arrhythmias. Cardiac muscle is particularly dependent on SERCA2a for normal function"]})]}),e.jsxs("p",{children:["CPA has been strongly implicated in ",e.jsx("strong",{children:'"Kodua poisoning"'})," — episodes of nausea, tremors, giddiness, and drowsiness documented in India and parts of Africa linked to consumption of kodo millet (Paspalum scrobiculatum) contaminated with A. flavus and A. tamarii. These outbreaks provide some of the best available evidence of CPA's acute effects in humans."]}),e.jsx("h2",{children:"Co-occurrence with Other Dangerous Mycotoxins"}),e.jsx("p",{children:"CPA is rarely the only mycotoxin present when its producer species are growing. The co-occurrence patterns are particularly concerning:"}),e.jsxs("ul",{children:[e.jsxs("li",{children:[e.jsx("strong",{children:"Aspergillus flavus"})," produces CPA together with ",e.jsx(i,{to:"/toxins/aflatoxins",className:"text-accent hover:underline",children:"aflatoxins"})," (potent carcinogens) and ",e.jsx(i,{to:"/toxins/aflatrem",className:"text-accent hover:underline",children:"aflatrem"})," (a tremorgenic neurotoxin). This triple threat of carcinogenic, neurotoxic, and calcium-disrupting compounds makes A. flavus contamination especially dangerous"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Penicillium commune and P. camemberti"})," produce CPA alongside ",e.jsx(i,{to:"/toxins/penicillic-acid",className:"text-accent hover:underline",children:"penicillic acid"}

1)," and other Penicillium metabolites. P. commune is one of the most frequently isolated indoor mould species in temperate climates"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Aspergillus oryzae"})," — widely used in food fermentation (soy sauce, sake, miso) — some strains produce CPA, raising questions about long-term dietary exposure in addition to any indoor sources"]}),e.jsxs("li",{children:["The combination of multiple mycotoxins from different pathways may have ",e.jsx("strong",{children:"synergistic or additive toxic effects"})," that are more harmful than any single toxin alone"]})]}),e.jsx("h2",{children:"Indoor Relevance — How Common Are CPA-Producing Moulds in UK Homes?"}),e.jsxs("p",{children:["While A. flavus and A. tamarii prefer warmer environments and are less common in UK buildings, ",e.jsx("strong",{children:"Penicillium commune and P. camemberti are frequently found in UK homes"}),". P. commune in particular is one of the most commonly isolated Penicillium species from indoor air in temperate European climates, making it a realistic source of CPA exposure for UK building occupants. CPA production has been confirmed on common building materials including:"]}),e.jsxs("ul",{children:[e.jsx("li",{children:"Plasterboard and drywall — the paper facing provides cellulose nutrition for Penicillium colonisation"}),e.jsx("li",{children:"Wallpaper and wallpaper paste — starch-based adhesives are excellent growth substrates"}),e.jsx("li",{children:"Ceiling tiles — particularly absorbent mineral fibre tiles in buildings with roof leaks or condensation"}),e.jsx("li",{children:"Chipboard and MDF furniture — these materials absorb moisture readily and support extensive mould growth when damp"}),e.jsx("li",{children:"Stored food products in damp areas — cheese, bread, nuts, and dried fruits are particularly susceptible"}),e.jsx("li",{children:"Textiles and carpets — in rooms with persistent humidity above 70%, fabric-based materials can support Penicillium growth"})]}),e.jsx("h2",{children:"Regulatory Status of Cyclopiazonic Acid"}),e.jsxs("p",{children:["There are ",e.jsx("strong",{children:"no regulatory limits"})," for cyclopiazonic acid in any country — neither for food nor for indoor air. EFSA has not yet established a formal risk assessment, though CPA has been identified as a mycotoxin requiring further investigation in several EU scientific opinions. The lack of regulation reflects limited human exposure data and the practical difficulties of setting standards for a compound that almost always co-occurs with other mycotoxins. However, absence of regulation should not be confused with absence of risk — CPA's mechanism is well understood and its toxic potential is clear from extensive laboratory and animal research."]}),e.jsx("h2",{children:"What Can You Do to Reduce CPA Exposure?"}),e.jsxs("ul",{children:[e.jsxs("li",{children:[e.jsx("strong",{children:"Control moisture and humidity"})," to prevent mould growth — maintain indoor relative humidity below 60% using dehumidifiers and adequate ventilation"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Ensure good ventilation throughout your property"})," — use extractor fans in kitchens and bathrooms, open trickle vents, and ensure air circulation behind furniture on external walls"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Address mould growth promptly"})," — if you spot Penicillium (blue-green or grey-green colonies) or Aspergillus growth, clean small areas immediately and investigate the moisture source"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"For persistent or extensive mould"}),", contact a ",e.jsx(i,{to:"/mould/inspections",className:"text-accent hover:underline",children:"professional mould surveyor"})," for assessment and ",e.jsx(i,{to:"/removal",className:"text-accent hover:underline",children:"remediation recommendations"})]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Don't store food in damp areas"})," — keep pantries, cupboards, and food storage areas dry and well-ventilated"]}),e.jsxs("li",{children:[e.jsx("strong",{children:"Fix leaks and water damage quickly"})," — Penicillium can colonise damp materials within 48–72 hours of water exposure"]})]})]}),e.jsx(c,{faqs:[{question:"What is cyclopiazonic acid?",answer:"Cyclopiazonic acid (CPA) is a mycotoxin that specifically inhibits the SERCA calcium pump in cells, disrupting calcium homeostasis. This affects muscle, liver, kidney, and immune function. It is produced by Aspergillus flavus, A. tamarii, and several Penicillium species commonly found in damp buildings."},{question:"Which moulds produce cyclopiazonic acid indoors?",answer:"CPA is produced by Aspergillus flavus, A. tamarii, Penicillium commune, P. camemberti, and P. griseofulvum. Penicillium commune is one of the most frequently isolated indoor mould species in temperate European climates, making it a realistic source of CPA exposure in UK homes."},{question:"What health effects does cyclopiazonic acid cause?",answer:"CPA disrupts cellular calcium homeostasis by inhibiting the SERCA pump, causing damage to the liver, kidneys, gastrointestinal tract, and muscles. It c

1auses neurological effects including tremors, and suppresses immune function. It has been implicated in Kodua poisoning outbreaks in India."},{question:"Is cyclopiazonic acid regulated?",answer:"No. There are no regulatory limits for CPA in any country, neither for food nor for indoor air. EFSA has identified it as requiring further investigation. The lack of regulation reflects limited human exposure data rather than absence of hazard."},{question:"Does CPA co-occur with other mycotoxins?",answer:"Yes. Aspergillus flavus produces CPA alongside aflatoxins (carcinogens) and aflatrem (neurotoxin). Penicillium commune produces CPA with other Penicillium metabolites. These co-occurrence patterns mean building occupants are typically exposed to multiple mycotoxins simultaneously."}]}),e.jsx(d,{currentPath:"/toxins/cyclopiazonic-acid"}),e.jsx(t,{})]})]});export{b as default};