Some data may have been extracted from scientific literature using a pipeline that uses large language models (LLMs). Source articles are cited where applicable to help verify the extracted relationships.
4-Chlorobiphenyl (C12H9Cl) is an exogenous organic compound with an average molecular weight of 188.65 g/mol. It exists as a solid at room temperature. 4-Chlorobiphenyl belongs to the biphenyls and derivatives, a subclass of benzene and substituted derivatives within the organic compounds. This compound is used in Low-Density Polyethylene and High-Density Polyethylene plastics. It has been released from eight recorded sources, including indoor air and electrical and electronic equipment such as fixed capacitors, antennas, amplifiers, auxiliary devices, and electrically stimulated smoking devices. The recorded exposure route for this substance is inhalation.
The compound interacts with eight recorded protein targets. It binds to the aryl hydrocarbon receptor (AHR), which disrupts cell function by altering gene transcription and inducing the expression of hepatic Phase II and Phase I enzymes, specifically the cytochrome P450 family. It also targets Cytochrome P450 1A2 (CYP1A2). 4-Chlorobiphenyl causes endocrine disruption in humans by binding to and inhibiting the estrogen receptor beta (ESR2) and estrogen receptor (ESR1). Additionally, it can bind to estrogen sulfotransferase (SULT1E1), which may produce other estrogenic effects such as reproductive dysfunction and stimulate the growth of certain cancer cells. Inhibition of tyrosine 3-monooxygenase (TH) and aromatic-L-amino-acid decarboxylase (DDC) is believed to cause decreased dopamine synthesis. Finally, 4-Chlorobiphenyl will bioaccumulate by binding to receptor proteins such as uteroglobin (SCGB1A1).
Belongs to the class of organic compounds known as chlorinated biphenyls. These are organic compounds containing at least one chlorine atom attached to either benzene ring of the biphenyl moiety.
The mechanism of action varies with the specific PCB. Dioxin-like PCBs bind to the aryl hydrocarbon receptor, which disrupts cell function by altering the transcription of genes, mainly be inducing the expression of hepatic Phase I and Phase II enzymes, especially of the cytochrome P450 family. Most of the toxic effects of PCBs are believed to be results of Ah receptor binding. Other PBCs are believed to interfere with calcium channels and/or change brain dopamine levels. PCBs can also cause endocrine disurption by altering the production of thyroid hormones and binding to estrogen receptors, which can stimulate the growth of certain cancer cells and produce other estrogenic effects, such as reproductive dysfunction. They will bioaccumulate by binding to receptor proteins such as uteroglobin. (1, 2, 4, 5)
Chronic PCB exposure results in symptoms such as abdominal pain, nausea, vomiting, diarrhea, headache, dizziness, depression, nervousness, dermal and ocular lesions, fatigue, irregular menstrual cycles and a lowered immune response. (1)
Treatment
There are no specific treatments for PCB poisoning, since it is not usually recognized until after substantial chronic exposure. Only preventing further exposure and treating the observed symptoms can be done. Acute inhalation can be treated by administering oxygen. (6)
Soil?Soil serves as a critical medium for plant growth and sustains various ecological functions; however, it can become a reservoir for synthetic chemical contamination.
Indoor air?Indoor air can be a significant reservoir for synthetic chemical contaminants, which often originate from various sources within enclosed environments.
Amplifiers?Amplifiers, commonly used in various electronic devices to enhance signal strength, can be a source of synthetic chemical contamination due to the materials and processes involved in their production and disposal.
Antennas?Antennas, commonly used in communication technologies, can be a source of synthetic chemical contamination through the materials and coatings used in their construction.
Conductors Or Conductive Bodies Characterised By The Conductive Materials?Conductors, or conductive bodies, are materials that allow the flow of electrical current, typically made from metals such as copper, aluminum, or silver.
Electrically Stimulated Smoking Devices?Electrically stimulated smoking devices, commonly known as e-cigarettes or vape pens, utilize electrical components to heat a liquid solution, often containing nicotine, flavorings, and other additives, to produce an aerosol for inhalation.
Electrodes?Electrodes, used in various electrical and electronic applications, can be a source of synthetic chemical contamination due to the materials from which they are constructed and the processes involved in their manufacturing.
Fixed Capacitors And Their Manufacture?Fixed capacitors are passive electronic components used to store and release electrical energy, playing a critical role in various circuits.
Television Systems?Television systems can be a source of synthetic chemical contamination due to the various materials and components used in their manufacture and operation.
Food Preservation?Food preservation often involves the use of synthetic chemicals, such as preservatives, flavor enhancers, and color additives, to extend shelf life and enhance the sensory qualities of food products.
Molluscicides?Molluscicides are synthetic chemicals specifically designed to control and eliminate mollusks, such as snails and slugs, which can be detrimental to crops and agricultural productivity.
Nematocides?Nematocides are synthetic chemicals specifically designed to control nematodes, which are microscopic roundworms that can cause significant damage to crops and plants.
Aftersun Products?Aftersun products are designed to soothe and hydrate the skin after sun exposure, often containing various synthetic chemicals such as emollients, preservatives, and fragrances.
Yarns Or Threads?Yarns or threads used in textiles can be a source of synthetic chemical contamination due to the production processes and treatments they undergo.
Nanotechnology?Nanotechnology involves the manipulation of materials at the molecular or atomic level, typically within the range of 1 to 100 nanometers.
Sludge Treatment?Sludge treatment involves the processing of waste materials generated from wastewater treatment plants, which often contain a variety of organic and inorganic substances.
Water, Wastewater, & Sewage Treatment?Water, wastewater, and sewage treatment processes are critical for managing and mitigating pollutants in water systems.
PCBs can cause endocrine disurption by binding to estrogen sulfotransferase, which can stimulate the growth of certain cancer cells and produce other estrogenic effects, such as reproductive dysfunction. (A3, A66)
Dioxin-like PCBs bind to the aryl hydrocarbon receptor, which disrupts cell function by altering the transcription of genes, mainly be inducing the expression of hepatic Phase I and Phase II enzymes, especially of the cytochrome P450 family. (A4)
Aoki Y: Polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans as endocrine disrupters--what we have learned from Yusho disease. Environ Res. 2001 May;86(1):2-11. [PubMed: 11386736]
Safe S, Bandiera S, Sawyer T, Robertson L, Safe L, Parkinson A, Thomas PE, Ryan DE, Reik LM, Levin W, et al.: PCBs: structure-function relationships and mechanism of action. Environ Health Perspect. 1985 May;60:47-56. [PubMed: 2992927]
Horowitz Y, Greenberg D, Ling G, Lifshitz M: Acrodynia: a case report of two siblings. Arch Dis Child. 2002 Jun;86(6):453. [PubMed: 12023189]
Troisi GM, Haraguchi K, Kaydoo DS, Nyman M, Aguilar A, Borrell A, Siebert U, Mason CF: Bioaccumulation of polychlorinated biphenyls (PCBs) and dichlorodiphenylethane (DDE) methyl sulfones in tissues of seal and dolphin morbillivirus epizootic victims. J Toxicol Environ Health A. 2001 Jan 12;62(1):1-8. [PubMed: 11205532]
Kester MH, Bulduk S, Tibboel D, Meinl W, Glatt H, Falany CN, Coughtrie MW, Bergman A, Safe SH, Kuiper GG, Schuur AG, Brouwer A, Visser TJ: Potent inhibition of estrogen sulfotransferase by hydroxylated PCB metabolites: a novel pathway explaining the estrogenic activity of PCBs. Endocrinology. 2000 May;141(5):1897-900. [PubMed: 10803601]
ATSDR - Agency for Toxic Substances and Disease Registry (2000). Toxicological profile for polychlorinated biphenyls. U.S. Public Health Service in collaboration with U.S. Environmental Protection Agency (EPA). - http://www.atsdr.cdc.gov/toxprofiles/tp17.html
ATSDR - Agency for Toxic Substances and Disease Registry (2001). Minimal Risk Levels (MRLs) for Hazardous Substances. U.S. Public Health Service in collaboration with U.S. Environmental Protection Agency (EPA). - http://www.atsdr.cdc.gov/mrls/
International Agency for Research on Cancer (2014). IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. - http://monographs.iarc.fr/index.php
World Health Organization (1993). Environ Health Criteria 140: Polychlorniated Biphenyls and Terphenyls.
Lewis RJ (1996). Sax's Dangerous Properties of Industrial Materials. 9th ed. Volumes 1-3. New York, NY: Van Nostrand Reinhold.
