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Journal articles on the topic 'Inorganic arsenic'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Kim, Hyojin, Yangwon Jeon, Woonwoo Lee, Geupil Jang, and Youngdae Yoon. "Shifting the Specificity of E. coli Biosensor from Inorganic Arsenic to Phenylarsine Oxide through Genetic Engineering." Sensors 20, no. 11 (2020): 3093. http://dx.doi.org/10.3390/s20113093.

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It has recently been discovered that organic and inorganic arsenics could be detrimental to human health. Although organic arsenic is less toxic than inorganic arsenic, it could form inorganic arsenic through chemical and biological processes in environmental systems. In this regard, the availability of tools for detecting organic arsenic species would be beneficial. Because As-sensing biosensors employing arsenic responsive genetic systems are regulated by ArsR which detects arsenics, the target selectivity of biosensors could be obtained by modulating the selectivity of ArsR. In this study,

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2

Chen, Jian, Yong-Guan Zhu, and Barry P. Rosen. "A Novel Biosensor Selective for Organoarsenicals." Applied and Environmental Microbiology 78, no. 19 (2012): 7145–47. http://dx.doi.org/10.1128/aem.01721-12.

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ABSTRACTOrganoarsenicals used as herbicides and growth promoters for farm animals are degraded to inorganic arsenic. Available bacterial whole-cell biosensors detect only inorganic arsenic. We report a biosensor selective for the trivalent organoarsenicals methylarsenite and phenylarsenite over inorganic arsenite. This sensor may be useful for detecting degradation of arsenic-containing herbicides and growth promoters.

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Roy, Nirmal K., Anthony Murphy, and Max Costa. "Arsenic Methyltransferase and Methylation of Inorganic Arsenic." Biomolecules 10, no. 9 (2020): 1351. http://dx.doi.org/10.3390/biom10091351.

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Arsenic occurs naturally in the environment, and exists predominantly as inorganic arsenite (As (III) and arsenate As (V)). Arsenic contamination of drinking water has long been recognized as a major global health concern. Arsenic exposure causes changes in skin color and lesions, and more severe health conditions such as black foot disease as well as various cancers originating in the lungs, skin, and bladder. In order to efficiently metabolize and excrete arsenic, it is methylated to monomethylarsonic and dimethylarsinic acid. One single enzyme, arsenic methyltransferase (AS3MT) is responsib

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4

Carey, Manus, Caroline Meharg, Paul Williams, et al. "Global Sourcing of Low-Inorganic Arsenic Rice Grain." Exposure and Health 12, no. 4 (2019): 711–19. http://dx.doi.org/10.1007/s12403-019-00330-y.

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AbstractArsenic in rice grain is dominated by two species: the carcinogen inorganic arsenic (the sum of arsenate and arsenite) and dimethylarsinic acid (DMA). Rice is the dominant source of inorganic arsenic into the human diet. As such, there is a need to identify sources of low-inorganic arsenic rice globally. Here we surveyed polished (white) rice across representative regions of rice production globally for arsenic speciation. In total 1180 samples were analysed from 29 distinct sampling zones, across 6 continents. For inorganic arsenic the global $$\tilde{x}$$ x ~ was 66 μg/kg, and for DM

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Miyashita, Shin-ichi, Chisato Murota, Keisuke Kondo, Shoko Fujiwara, and Mikio Tsuzuki. "Arsenic metabolism in cyanobacteria." Environmental Chemistry 13, no. 4 (2016): 577. http://dx.doi.org/10.1071/en15071.

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Environmental context Cyanobacteria are ecologically important, photosynthetic organisms that are widely distributed throughout the environment. They play a central role in arsenic transformations in terms of both mineralisation and formation of organoarsenic species as the primary producers in aquatic ecosystems. In this review, arsenic resistance, transport and biotransformation in cyanobacteria are reviewed and compared with those in other organisms. Abstract Arsenic is a toxic element that is widely distributed in the lithosphere, hydrosphere and biosphere. Some species of cyanobacteria ca

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6

Jankong, Patcharin, Cherif Chalhoub, Norbert Kienzl, Walter Goessler, Kevin A. Francesconi, and Pornsawan Visoottiviseth. "Arsenic accumulation and speciation in freshwater fish living in arsenic-contaminated waters." Environmental Chemistry 4, no. 1 (2007): 11. http://dx.doi.org/10.1071/en06084.

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Environmental context. Inorganic arsenic, a well-known human carcinogen, represents a major worldwide environmental problem because contaminated water supplies have lead to widespread human exposure. This study investigates the arsenic content of freshwater fish from arsenic-contaminated and non-contaminated sites in Thailand, and reports high arsenic concentrations and significant amounts of inorganic arsenic in the edible muscle tissue. The data suggest that freshwater fish may represent a significant source of inorganic arsenic to some human populations. Abstract. Striped snakehead (Channa

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Matsumoto-Tanibuchi, Eri, Toshiaki Sugimoto, Toshiyuki Kawaguchi, Naoki Sakakibara, and Michiaki Yamashita. "Determination of Inorganic Arsenic in Seaweed and Seafood by LC-ICP-MS: Method Validation." Journal of AOAC INTERNATIONAL 102, no. 2 (2019): 612–18. http://dx.doi.org/10.5740/jaoacint.18-0148.

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Abstract Background: Seaweed and seafoodoften contain both inorganic and organic arsenic compounds showing distinct toxicities. Speciation must be taken into account when determining the concentrations of arsenic compounds and how they relate to overall toxicity. Objective: An analytical method for the quantitation of inorganicarsenic was validated in seaweed and seafood. Methods: Food samples were heated at 100°C in 0.3 mol/L nitric acid. Arsenic speciation was quantitatively determined by LC-inductively coupled plasma-MS (LC-ICP-MS) using an octadecilsilane (ODS) column with a mobile phase c

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8

DAI, SHOUHUI, HUI YANG, XUEFEI MAO, et al. "Evaluation of Arsenate Content of Rice and Rice Bran Purchased from Local Markets in the People's Republic of China." Journal of Food Protection 77, no. 4 (2014): 665–69. http://dx.doi.org/10.4315/0362-028x.jfp-13-344.

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In previous studies, inorganic arsenic and total arsenic concentrations in rice bran have been much higher than those in polished rice obtained from the same whole paddy rice. However, the arsenic species distribution between rice and bran is still unknown, especially for arsenite (AsIII) and arsenate (AsV). To characterize the arsenic species in rice and bran and explain the elevated concentrations of inorganic arsenic and total arsenic, four arsenic species, AsIII, AsV, dimethylarsinic acid, and monomethylarsonic acid, were evaluated. Rice and bran samples (n = 108) purchased from local mark

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9

Sinha, B., and K. Bhattacharyya. "Arsenic speciation in rice and risk assessment of inorganic arsenic from Ghentugachhi village of Chakdaha block, Nadia, West Bengal, India." Oryza-An International Journal on Rice 57, no. 2 (2020): 85–93. http://dx.doi.org/10.35709/ory.2020.57.2.1.

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The purpose of the present study was to assess arsenic (As) speciation in rice from West Bengal, India, in order to improve understanding of the health risk posed by arsenic in Indian rice. Rice is a potentially important route of human exposure to arsenic, especially in populations with rice-based diets. However, arsenic toxicity varies greatly with species. Determination of arsenic (As) species in rice is necessary because inorganic As species are more toxic than organic As. Total arsenic was determined by inductively coupled plasma mass spectrometry; arsenite, arsenate, monomethylarsonic ac

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10

Zhou, Ting, Jian Mei Zhou, Li Ming Zhou, et al. "Conversion and Species Distribution Characteristics of Arsenical Chemical Agent in the Soil Contaminated by Chemical Weapons Abandoned by Japan." Advanced Materials Research 955-959 (June 2014): 1194–203. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.1194.

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In order to phytoremediation the soils contaminated by arsenical chemical weapons abandoned by Japan at some region of Jilin Province and ready for the estimate of the ecological safety, this paper analyzed organic species in soil with GC-MS, disscussed extraction and testing of inorganic arsenic in soil with hydrochloric acid, studied species of arsenic in soil such as available forms, valence state, and combined state, and inferred conversion process of arsenical chemical agent. The results indicate that after simple destroying and long time burial, almost all arsenical chemical agents in so

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11

Glabonjat, Ronald A., Jodi S. Blum, Laurence G. Miller, et al. "Arsenolipids in Cultured Picocystis Strain ML and Their Occurrence in Biota and Sediment from Mono Lake, California." Life 10, no. 6 (2020): 93. http://dx.doi.org/10.3390/life10060093.

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Primary production in Mono Lake, a hypersaline soda lake rich in dissolved inorganic arsenic, is dominated by Picocystis strain ML. We set out to determine if this photoautotrophic picoplankter could metabolize inorganic arsenic and in doing so form unusual arsenolipids (e.g., arsenic bound to 2-O-methyl ribosides) as reported in other saline ecosystems and by halophilic algae. We cultivated Picocystis strain ML on a seawater-based medium with either low (37 µM) or high (1000 µM) phosphate in the presence of arsenite (400 µM), arsenate (800 µM), or without arsenic additions (ca 0.025 µM). Cult

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12

Nadar, S. Venkadesh, Masafumi Yoshinaga, Palani Kandavelu, Banumathi Sankaran, and Barry P. Rosen. "Crystallization and preliminary X-ray crystallographic studies of the ArsI C–As lyase fromThermomonospora curvata." Acta Crystallographica Section F Structural Biology Communications 70, no. 6 (2014): 761–64. http://dx.doi.org/10.1107/s2053230x14008814.

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Arsenic is a ubiquitous and carcinogenic environmental element that enters the biosphere primarily from geochemical sources, but also through anthropogenic activities. Microorganisms play an important role in the arsenic biogeochemical cycle by biotransformation of inorganic arsenic into organic arsenicals andvice versa. ArsI is a microbial nonheme ferrous-dependent dioxygenase that transforms toxic methylarsonous acid to the less toxic inorganic arsenite by C–As bond cleavage. An ArsI ortholog from the thermophilic bacteriumThermomonospora curvatawas expressed, purified and crystallized. The

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13

Wood, B. Alan, Shinichi Miyashita, Toshikazu Kaise, Andrea Raab, Andrew A. Meharg, and Jörg Feldmann. "Arsenic is not stored as arsenite - phytochelatin complexes in the seaweeds Fucus spiralis and Hizikia fusiforme." Environmental Chemistry 8, no. 1 (2011): 30. http://dx.doi.org/10.1071/en10071.

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Environmental context Seaweeds hyperaccumulate the toxic metalloid arsenic, but seemingly achieve detoxification by transformation to arsenosugars. The edible seaweed hijiki is a notable exception because it contains high levels of toxic arsenate and arsenite. Terrestrial plants detoxify arsenic by forming arsenite–phytochelatin complexes. The hypothesis that seaweeds also synthesise phytochelatins to bind arsenite as a means of detoxification before arsenosugar synthesis is tested in this investigation. Abstract Phytochelatins (PCs), generic structure [γ-Glu-Cys]n-Gly, are peptides synthesise

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14

Benbrahim-Tallaa, Lamia, and Michael Waalkes. "Inorganic arsenic and human prostate cancer." Ciência & Saúde Coletiva 14, no. 1 (2009): 307–18. http://dx.doi.org/10.1590/s1413-81232009000100037.

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We critically evaluated the etiologic role of inorganic arsenic in human prostate cancer. We assessed data from relevant epidemiologic studies concerning environmental inorganic arsenic exposure. Whole animal studies were evaluated as were in vitro model systems of inorganic arsenic carcinogenesis in the prostate. Multiple studies in humans reveal an association between environmental inorganic arsenic exposure and prostate cancer mortality or incidence. Many of these human studies provide clear evidence of a dose-response relationship. Relevant whole animal models showing a relationship betwee

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15

Huynh, Trang, Hugh H. Harris, Hao Zhang, and Barry N. Noller. "Measurement of labile arsenic speciation in water and soil using diffusive gradients in thin films (DGT) and X-ray absorption near edge spectroscopy (XANES)." Environmental Chemistry 12, no. 2 (2015): 102. http://dx.doi.org/10.1071/en14047.

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Environmental context Both inorganic and organic arsenic species are toxic to the environment when labile. The Diffusive Gradients in Thin Films technique, equipped with ferrihydrite binding gel enables measurement of labile arsenic species from water and soil solutions. This study indicated that labile arsenic species are quantitatively adsorbed to the gel, and that they are stable for up to 2 weeks following deployment. Abstract Arsenic speciation was determined in the solution extracted from a ferrihydrite binding gel layer in a DGT unit (FB-DGT) deployed in water using coupled high-perform

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16

Dong, Owen, Michael Powers, Zijuan Liu, and Masafumi Yoshinaga. "Arsenic Metabolism, Toxicity and Accumulation in the White Button Mushroom Agaricus bisporus." Toxics 10, no. 10 (2022): 554. http://dx.doi.org/10.3390/toxics10100554.

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Mushrooms have unique properties in arsenic metabolism. In many commercial and wild-grown mushrooms, arsenobetaine (AsB), a non-toxic arsenical, was found as the dominant arsenic species. The AsB biosynthesis remains unknown, so we designed experiments to study conditions for AsB formation in the white button mushroom, Agaricus bisporus. The mushrooms were treated with various arsenic species including arsenite (As(III)), arsenate (As(V)), methylarsenate (MAs(V)), dimethylarsenate (DMAs(V)) and trimethylarsine oxide (TMAsO), and their accumulation and metabolism were determined using inductive

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17

Percy, Andrew J., and Jürgen Gailer. "Methylated Trivalent Arsenic-Glutathione Complexes are More Stable than their Arsenite Analog." Bioinorganic Chemistry and Applications 2008 (2008): 1–8. http://dx.doi.org/10.1155/2008/539082.

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The trivalent arsenic glutathione complexes arsenic triglutathione, methylarsonous diglutathione, and dimethylarsinous glutathione are key intermediates in the mammalian metabolism of arsenite and possibly represent the arsenic species that are transported from the liver to the kidney for urinary excretion. Despite this, the comparative stability of the arsenic-sulfur bonds in these complexes has not been investigated under physiological conditions resembling hepatocyte cytosol. Using size-exclusion chromatography and a glutathione-containing phosphate buffered saline mobile phase (5 or 10 mM

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18

Srivastava, Sudhakar, Munish Kumar Upadhyay, Rudra D. Tripathi, and Om Parkash Dhankher. "Arsenic Transport, Metabolism and Toxicity in Plants." INTERNATIONAL JOURNAL OF PLANT AND ENVIRONMENT 2, no. 1 and 2 (2016): 17–28. http://dx.doi.org/10.18811/ijpen.v2i1-2.6614.

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Arsenic is a toxic metalloid present in large areas in some parts of world including densely populated areas of Bangladesh and West Bengal, India. Being a carcinogenic metalloid, it affects the health of millions of people of affected areas through drinking water and food. Nonetheless, the spread of arsenic contamination reaches to non-affected areas also. Rice is the major crop of the affected areas and is thus the most important carrier of arsenic in grains and in various rice based products throughout the world. Arsenic exists in various inorganic and organic forms with arsenite and arsenat

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19

Imran, Muhammad Asif, Feroza Hamid Wattoo, Muhammad Nawaz Chaudhry, Muhammad Hamid Sarwar Wattoo, and Khan Rass Masood. "Impact of Inorganic Arsenicals on Vegetative Growth of Two Pakistani Origins Sunflower Cultivars." Journal of Chemistry 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/275830.

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Inorganic arsenicals impact on vegetative growth of two sunflower (Helianthus annuusL.) cultivars (FH-385 as Hybrid 1 and FH-405 as Hybrid 2) was monitored. Various levels of two different sodium salts of arsenic, namely, sodium arsenate (Na2HAsO4·7H2O) as source of As5+and sodium arsenite (NaAsO2) as source of As3+, were used to evaluate the effect of arsenic on plant water relation parameters. Significant stress effects were found when arsenic was higher in concentrations (>60 mg/kg soil of both salts) as compared to control plants. Genotype FH-405 showed higher levels for shoot and root

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Packianathan, Charles, Jitesh K. Pillai, Ahmed Riaz, Palani Kandavelu, Banumathi Sankaran, and Barry P. Rosen. "Crystallization and preliminary X-ray crystallographic studies of CrArsM, an arsenic(III)S-adenosylmethionine methyltransferase fromChlamydomonas reinhardtii." Acta Crystallographica Section F Structural Biology Communications 70, no. 10 (2014): 1385–88. http://dx.doi.org/10.1107/s2053230x14018469.

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Arsenic is one the most toxic environmental substances. Arsenic is ubiquitous in water, soil and food, and ranks first on the Environmental Protection Agency's Superfund Priority List of Hazardous Substances. Arsenic(III)S-adenosylmethionine methyltransferases (AS3MT in animals and ArsM in microbes) are key enzymes of arsenic biotransformation, catalyzing the methylation of inorganic arsenite to give methyl, dimethyl and trimethyl products. Arsenic methyltransferases are found in members of every kingdom from bacteria to humans (EC 2.1.1.137). In the human liver, hAS3MT converts inorganic arse

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Majumder, Durjoy, and Sayan Mukherjee. "Molecular Docking Assessment of Efficacy of Different Clinically Used Arsenic Chelator Drugs." Journal of Computational Medicine 2013 (December 15, 2013): 1–8. http://dx.doi.org/10.1155/2013/396768.

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Arsenic contamination of ground water has become a global problem affecting specially, south-east Asian countries like Bangladesh and eastern parts of India. It also affects South America and some parts of the US. Different organs of the physiological system are affected due to contamination of inorganic arsenic in water. Animal studies with different chelators are not very conclusive as far as the multi/differential organ effect(s) of arsenic is concerned. Our docking study establishes the molecular rationale of blood test for early detection of arsenic toxicity; as arsenic has a high affinit

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Chen, Miaomiao, Yi Li, Hong Pan, et al. "Application of Monoclinic Bismuth Vanadate in Photooxidation of Arsenic-Polluted Water." Transactions of the ASABE 63, no. 6 (2020): 1649–55. http://dx.doi.org/10.13031/trans.13754.

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HighlightsPhotooxidation of trivalent arsenic to pentavalent arsenic was catalyzed by s-m BiVO4 under visible light irradiation.The roles of catalyst, light, and oxygen were investigated.The photooxidation mechanism was studied, and a possible reaction route is proposed.Abstract. Oxidation is a necessary step for inorganic arsenic removal. In this study, monoclinic bismuth vanadate (BiVO4) was synthesized to photooxidize trivalent arsenic to pentavalent arsenic in water in the presence of light and oxygen. Light irradiation initiates photooxidation after physical absorption of arsenite on BiVO

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Chowdhury, Uttam K. "Food Chain Arsenic: Additional body burden on health of arsenic." Journal of Food Science and Nutritional Disorders 1, no. 1 (2021): 45–47. http://dx.doi.org/10.55124/jfsn.v1i1.123.

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Introduction   Arsenic: The king of poisons, the poisons of kings, and the bane of investigators1. The IARC2 has classified arsenic as a group 1 human carcinogen. Chronic exposure to inorganic arsenic can cause cancerous2-5 and non-cancerous health hazards6,7 in humans. Arsenic can get entry into the human body via drinking water, eating food, inhaling dust, and/or ingesting soil.  In arsenic affected areas of West Bengal-India and Bangladesh huge quantity of arsenic is falling on agricultural land. A study in West Bengal-India reported that in a 201 km2 area of t

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Ma, Mingsheng, and X. Chris Le. "Effect of arsenosugar ingestion on urinary arsenic speciation." Clinical Chemistry 44, no. 3 (1998): 539–50. http://dx.doi.org/10.1093/clinchem/44.3.539.

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Abstract We developed and evaluated a method for the determination of μg/L concentrations of individual arsenic species in urine samples. We have mainly studied arsenite [As(III)], arsenate [As(V)], monomethylarsonic acid (MMAA), and dimethylarsinic acid (DMAA) because these are the most commonly used biomarkers of exposure by the general population to inorganic arsenic and because of concerns over these arsenic species on their toxicity and carcinogenicity. We have also detected five unidentified urinary arsenic species resulting from the metabolism of arsenosugars. We combined ion pair liqui

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DeSesso, John M. "Teratogen update: Inorganic arsenic." Teratology 64, no. 3 (2001): 170–73. http://dx.doi.org/10.1002/tera.1060.

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SAIPAN, PIYAWAT, SUTHEP RUANGWISES, BUNDIT TENGJAROENKUL, and NONGLUCK RUANGWISES. "Total and Inorganic Arsenic in Freshwater Fish and Prawn in Thailand." Journal of Food Protection 75, no. 10 (2012): 1890–95. http://dx.doi.org/10.4315/0362-028x.jfp-12-177.

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Total and inorganic arsenic levels were determined in 120 samples of eight freshwater animal species collected from five distribution centers in the central region of Thailand between January and March 2011. Eight species with the highest annual catch, consisting of seven fish species and one prawn species, were analyzed. Concentrations of inorganic arsenic (on a wet weight basis) ranged from 0.010 μg/g in giant prawn (Macrobrachium rosenbergii) to 0.230 μg/g in striped snakehead (Channa striata). Climbing perch (Anabas testudineus) exhibited the highest mean concentrations of total arsenic (0

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Beniwal, Rahul, Radheshyam Yadav, and Wusirika Ramakrishna. "Multifarious Effects of Arsenic on Plants and Strategies for Mitigation." Agriculture 13, no. 2 (2023): 401. http://dx.doi.org/10.3390/agriculture13020401.

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Arsenic contamination in soil and water is a major problem worldwide. Inorganic arsenic is widely present as arsenate and arsenite. Arsenic is transferred to crops through the soil and irrigation water. It is reported to reduce crop production in plants and can cause a wide array of diseases in humans, including different types of cancers, premature delivery, stillbirth, and spontaneous abortion. Arsenic methyltransferase (AS3MT) in the human body converts inorganic arsenic into monomethylarsonic acid and dimethylarsinic acid, which are later excreted from the body. Arsenic transfer from the s

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RUANGWISES, SUTHEP, and NONGLUCK RUANGWISES. "Concentrations of Total and Inorganic Arsenic in Fresh Fish, Mollusks, and Crustaceans from the Gulf of Thailand." Journal of Food Protection 74, no. 3 (2011): 450–55. http://dx.doi.org/10.4315/0362-028x.jfp-10-445.

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Concentrations of total and inorganic arsenic were determined in 120 samples of eight marine animals collected from the Gulf of Thailand between March and May 2008. Two species with the highest annual catch from each of four marine animal groups were analyzed: fish (Indo-Pacific mackerel and goldstripe sardine), bivalves (green mussel and blood cockle), cephalopods (pharaoh cuttlefish and Indian squid), and crustaceans (banana prawn and swimming crab). Concentrations of inorganic arsenic based on wet weight ranged from 0.012 μg/g in Indian squids to 0.603 μg/g in blood cockles. Average percent

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Caumette, G., I. Koch, K. House, and K. J. Reimer. "Arsenic cycling in freshwater phytoplankton and zooplankton cultures." Environmental Chemistry 11, no. 5 (2014): 496. http://dx.doi.org/10.1071/en14039.

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Environmental context Understanding how arsenic is changed from toxic to non-toxic chemical forms in lakes and rivers is important in understanding the overall risk from arsenic. Freshwater plankton exposed in laboratory cultures to different sources of toxic inorganic arsenate formed arsenosugars, but at higher exposure levels, in water and through contaminated sediment, inorganic arsenate remained unchanged. In arsenic-contaminated freshwater bodies, plankton may provide a source of toxic inorganic arsenic to consumers. Abstract Freshwater phytoplankton (Chlamydomonas) and zooplankton (Daphn

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Qu, Gaoyang, Zi Liu, Jiaxin Zhang, et al. "PINK1/Parkin-Mediated Mitophagy Partially Protects against Inorganic Arsenic-Induced Hepatic Macrophage Polarization in Acute Arsenic-Exposed Mice." Molecules 27, no. 24 (2022): 8862. http://dx.doi.org/10.3390/molecules27248862.

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Inorganic arsenic is a well-known environmental toxicant and carcinogen, and there is overwhelming evidence for an association between this metalloid poisoning and hepatic diseases. However, the biological mechanism involved is not well characterized. In the present study, we probed how inorganic arsenic modulates the hepatic polarization of macrophages, as well as roles of PTEN-induced kinase 1 (PINK1)/Parkin-mediated mitophagy participates in regulating the metalloid-mediated macrophage polarization. Our results indicate that acute arsenic exposure induced macrophage polarization with up-reg

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Österlund, Heléne, Mikko Faarinen, Johan Ingri, and Douglas C. Baxter. "Contribution of organic arsenic species to total arsenic measurements using ferrihydrite-backed diffusive gradients in thin films (DGT)." Environmental Chemistry 9, no. 1 (2012): 55. http://dx.doi.org/10.1071/en11057.

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Environmental contextBoth the mobility and toxicity of arsenic in natural waters are related to the aqueous species distribution. Passive sampling using ferrihydrite-backed diffusive gradients in thin films (DGT) devices has in previous studies been characterised to measure labile inorganic arsenic, and the possible contribution of organic species has been disregarded. This study shows that the two most prevalent organic arsenic species might be included in DGT measurements, which should be taken into consideration when evaluating DGT data in future studies. AbstractIn previous publications di

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Chowdhury, Uttam. "Arsenic Biotransformation: It is a complex process." International Journal of Biochemistry and Peptides 1, no. 1 (2021): 38–40. http://dx.doi.org/10.55124/ijbp.v1i1.142.

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Introduction  The IARC (1987)1 has classified arsenic as a group 1 human carcinogen. Chronic exposure to inorganic arsenic can cause cancerous1-4 and non-cancerous health hazards5,6 in humans. Arsenic can get entry into the human body via drinking water, eating food, inhaling dust, and/or ingesting soil. An important limitation on the scientific understanding of arsenic toxicity is the complexity of arsenic metabolism. Differences in susceptibility to arsenic toxicity might be manifested by differences in arsenic metabolism or in the prevalence of arsenic-associated diseases

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Beck, B. D., T. M. Slayton, C. H. Farr, D. W. Sved, E. A. Crecelius, and J. F. Holson. "Systemic uptake of inhaled arsenic in rabbits." Human & Experimental Toxicology 21, no. 4 (2002): 205–15. http://dx.doi.org/10.1191/0960327102ht237oa.

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Human occupational exposure to sufficiently high levels of arsenic in air has been associated with lung cancer, but generally not other types of cancer. Thus, a better understanding of the relationship between airborne arsenic exposures and systemic uptake is essential. In this study, rabbits were exposed to one of four levels of arsenic trioxide in air for 8 h/day, 7 days/week, for 8 weeks (0.05, 0.1, 0.22, or 1.1 mg/m3). Plasma levels of inorganic arsenic, monomethylarsonic acid (MMA), and dimethylarsinic acid (DMA) were measured following the last exposure. Although there was a dose-related

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Monboonpitak, Nuntawat, Suthep Ruangwises, Sawanya Buranaphalin, and Nongluck Ruangwises. "Probabilistic Risk Assessment of Inorganic Arsenic via Consumption of Herbs Collected in Thailand." Evidence-Based Complementary and Alternative Medicine 2018 (July 15, 2018): 1–8. http://dx.doi.org/10.1155/2018/8646579.

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Total and inorganic arsenic contents in ten commonly consumed Thai herbs, namely, bird’s eye chili, cayenne pepper, celery, garlic, holy basil, kitchen mint, lemongrass, pepper, shallot, and sweet basil, were determined using atomic absorption spectrometry coupled with a hydride generation system (HG-AAS). Total arsenic contents in fresh herbs and lyophilized herbs ranged from 3.39 to 119 ng/g wet weight (wet wt) and from 41.0 to 156 ng/g dry weight (dry wt), respectively. Inorganic arsenic contents in fresh herbs and lyophilized herbs ranged from 2.09 to 26.9 ng/g (wet wt) and from 23.5 to 55

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Drewniak, Lukasz, Renata Matlakowska, and Aleksandra Sklodowska. "Microbial Impact on Arsenic Mobilization in Zloty Stok Gold Mine." Advanced Materials Research 71-73 (May 2009): 121–24. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.121.

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The aim of this review report was to summarize knowledge about arsenic-metabolizing bacteria isolated from Zloty Stok (SW Poland) gold mine and determine their potential role in mobilization of arsenic. Three physiologically different groups of arsenic metabolizing microorganisms (arsenite oxidizers, dissmiliatory arsenate reducers and arsenic resistant microbes) were isolated from the deepest section of Gertruda Adit in Zloty Stok (SW Poland) gold mine. Twenty two strains were isolated from the rock biofilms and seven from arsenic-rich bottom sediments. Analysis of the 16S rRNA gene sequence

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Liu, Dan, Xiaoxu Duan, Dandan Dong, et al. "Activation of the Nrf2 Pathway by Inorganic Arsenic in Human Hepatocytes and the Role of Transcriptional Repressor Bach1." Oxidative Medicine and Cellular Longevity 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/984546.

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Previous studies have proved that the environmental toxicant, inorganic arsenic, activates nuclear factor erythroid 2-related factor 2 (Nrf2) pathway in many different cell types. This study tried to explore the hepatic Nrf2 pathway upon arsenic treatment comprehensively, since liver is one of the major target organs of arsenical toxicity. Our results showed that inorganic arsenic significantly induced Nrf2 protein and mRNA expression in Chang human hepatocytes. We also observed a dose-dependent increase of antioxidant response element- (ARE-) luciferase activity. Both the mRNA and protein lev

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Tokar, Erik J., Bhalchandra A. Diwan, and Michael P. Waalkes. "Arsenic Exposure In Utero and Nonepidermal Proliferative Response in Adulthood in Tg.AC Mice." International Journal of Toxicology 29, no. 3 (2010): 291–96. http://dx.doi.org/10.1177/1091581810362804.

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To expand our knowledge on the transplacental carcinogenic potential of inorganic arsenic, pregnant Tg.AC mice received drinking water with 0, 42.5, or 85 ppm arsenite from gestation day 8 to 18. After birth, groups (n = 25) of offspring received topical 12- O-tetradecanoyl phorbol-13-acetate (TPA) (2 μg twice a week) for 36 weeks and were killed; nonskin tumors were assessed. Arsenic increased adrenal cortical adenomas (ACAs; 25%-29%) compared with control (0%) independent of TPA in all male groups. Arsenic increased urinary bladder (UB) hyperplasia in males, but only with TPA. Arsenic induce

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Harfoush, M., S. A. Mirbagheri, M. Ehteshami, and S. Nejati. "Arsenic removal from drinking water using low-pressure nanofiltration under various operating conditions." Water Practice and Technology 13, no. 2 (2018): 295–302. http://dx.doi.org/10.2166/wpt.2018.042.

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Abstract Currently, one of the main environmental concerns is the toxicity caused by arsenic. Arsenic-polluted water can cause many human health problems including various cancerous diseases. In natural water, inorganic arsenic can be found in the forms of arsenite and arsenate, which have been found in several Iranian provinces – e.g., East Azerbaijan, Kurdistan, and the city of Bijar – in high concentrations. Modern nanofiltration (NF) technology enables a wide range of water resource pollutants to be controlled efficiently. In this study, in an attempt to enhance arsenic removal (both arsen

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Hunder, G., J. Schaper, O. Ademuyiwa, and B. Elsenhans. "Species differences in arsenic-mediated renal copper accumulation: a comparison between rats, mice and guinea pigs." Human & Experimental Toxicology 18, no. 11 (1999): 699–705. http://dx.doi.org/10.1191/096032799678839545.

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1 Administration of arsenite leads to an accumulation of copper in the rat kidney. Owing to the high retention of arsenic in the erythrocytes, however, the rat is considered to possess special toxicokinetics of arsenic and is therefore considered less comparable with other species in this respect. 2 Therefore, we compared the effect of dietary arsenite in mice and guinea pigs with that in rats. Each species was divided into four groups of animals according to the diets fed which contained increasing concentrations of sodium arsenite (NaAsO2;0,10,30and60mg As/kg of diet). Animals were killed af

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Jeong, SunHwa, Changhwan Ahn, Jin-Sook Kwon, KangMin Kim, and Eui-Bae Jeung. "Effects of Sodium Arsenite on the Myocardial Differentiation in Mouse Embryonic Bodies." Toxics 11, no. 2 (2023): 142. http://dx.doi.org/10.3390/toxics11020142.

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Arsenic in inorganic form is a known human carcinogen; even low levels of arsenic can interfere with the endocrine system. In mammalian development, arsenic exposure can cause a malformation of fetuses and be lethal. This study examined the effects of sodium arsenite (SA) as the inorganic form of arsenic in embryonic bodies (EBs) with three germ layers in the developmental stage. This condition is closer to the physiological condition than a 2D cell culture. The SA treatment inhibited EBs from differentiating into cardiomyocytes. A treatment with 1 μM SA delayed the initiation of beating, pres

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Wang, Amy, Steven D. Holladay, Douglas C. Wolf, S. Ansar Ahmed, and John L. Robertson. "Reproductive and Developmental Toxicity of Arsenic in Rodents: A Review." International Journal of Toxicology 25, no. 5 (2006): 319–31. http://dx.doi.org/10.1080/10915810600840776.

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Arsenic is a recognized reproductive toxicant in humans and induces malformations, especially neural tube defects, in laboratory animals. Early studies showed that murine malformations occurred only when a high dose of inorganic arsenic was given by intravenous or intraperitoneal injection in early gestation. Oral gavage of inorganic arsenic at maternally toxic doses caused reduced fetal body weight and increased resorptions. Recently, arsenic reproductive and developmental toxicity has been studied in situations more similar to human exposures and using broader endpoints, such as behavioral c

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Miyashita, Shin-ichi, Shoko Fujiwara, Mikio Tsuzuki, and Toshikazu Kaise. "Cyanobacteria produce arsenosugars." Environmental Chemistry 9, no. 5 (2012): 474. http://dx.doi.org/10.1071/en12061.

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Environmental contextAlthough arsenic is known to accumulate in both marine and freshwater ecosystems, the pathways by which arsenic is accumulated and transferred in freshwater systems are reasonably unknown. This study revealed that freshwater cyanobacteria have the ability to produce arsenosugars from inorganic arsenic compounds. The findings suggest that not only algae, but cyanobacteria, play an important role in the arsenic cycle of aquatic ecosystems. AbstractMetabolic processes of incorporated arsenate in axenic cultures of the freshwater cyanobacteria Synechocystis sp. PCC 6803 and No

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Le, Dinh-Vu, Tan-Lap Phan, and Quang-Hieu Tran. "Validation of an analytical method for the determination of inorganic, organic, and total arsenic in fish sauce based on hydride generation atomic absorption spectrometry." International Food Research Journal 28, no. 6 (2021): 1164–70. http://dx.doi.org/10.47836/ifrj.28.6.07.

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An atomic absorption spectrometric (AAS) method was performed to determine the total, inorganic, and organic arsenic in fish sauce. The total organic arsenic was calculated from the total and inorganic arsenic values quantified using the hydride generation AAS (HG-AAS). Under optimal experimental conditions at the absorbance wavelength of 193.7 nm, the concentration of inorganic arsenic in fish sauce ranged from 0.05 to 1.2 mg/L, with a limit of detection (LOD) of 0.015 mg/L. The detectable total arsenic concentrations varied widely, ranging from 0.03 to 2.5 mg/L with the LOD of as low as 0.01

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Zheng, Tao, Cheng Chu Liu, Jing Ya Yang, Qi Gen Liu, and Jia Le Li. "Hijiki Seaweed (Hizikia fusiformis): Nutritional Value, Safety Concern and Arsenic Removal Method." Advanced Materials Research 634-638 (January 2013): 1247–52. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.1247.

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This study reported the nutritional components and heavy metals of Hijiki seaweed (Hizikia fusiformis) and investigated the efficacy of aqueous extraction method to remove inorganic arsenic from Hijiki seaweed. Hijiki contained 12.2% of crude proteins, 1.8% of total lipids, 14.0% of ashes, 11.3% of total fiber with dry weight, respectively. The content of protein and ashes were slightly lower than other edible seaweeds including Laminaria japonica, Porphyra tenera, Undaria pinnatifida, Palmaria palmate, while the total fiber was much higher compared with those four seaweeds (6.7-7.8%), which s

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Parada, Humberto, Tianying Wu, Rebecca C. Fry, et al. "Understanding the Relationship between Environmental Arsenic and Prostate Cancer Aggressiveness among African-American and European-American Men in North Carolina." International Journal of Environmental Research and Public Health 17, no. 22 (2020): 8364. http://dx.doi.org/10.3390/ijerph17228364.

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High-level exposure to arsenic, a known carcinogen and endocrine disruptor, is associated with prostate cancer (PCa) mortality. Whether low-level exposure is associated with PCa aggressiveness remains unknown. We examined the association between urinary arsenic and PCa aggressiveness among men in North Carolina. This cross-sectional study included 463 African-American and 491 European-American men with newly diagnosed, histologically confirmed prostate adenocarcinoma. PCa aggressiveness was defined as low aggressive (Gleason score < 7, stage = cT1–cT2, and PSA < 10 ng/mL) versus intermed

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He, Dongdong, Yuming Xiong, Li Wang, Wei Sun, Runqing Liu, and Tong Yue. "Arsenic (III) Removal from a High-Concentration Arsenic (III) Solution by Forming Ferric Arsenite on Red Mud Surface." Minerals 10, no. 7 (2020): 583. http://dx.doi.org/10.3390/min10070583.

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Arsenic (As) is considered one of the most serious inorganic pollutants, and the wastewater produced in some smelters contains a high concentration of arsenic. In this paper, we purified the high-concentration arsenic solution with red mud and Fe3+ synergistically. In this system, arsenite anions reacted with Fe(III) ions to form ferric arsenite, which attached on the surface of red mud particles. The generated red mud/Fe1−x(As)x(OH)3 showed a better sedimentation performance than the pure ferric arsenite, which is beneficial to the separation of arsenic from the solution. The red mud not only

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Benramdane, Larbi, Michele Accominotti, Laurent Fanton, Daniel Malicier, and Jean-Jacques Vallon. "Arsenic Speciation in Human Organs following Fatal Arsenic Trioxide Poisoning—A Case Report." Clinical Chemistry 45, no. 2 (1999): 301–6. http://dx.doi.org/10.1093/clinchem/45.2.301.

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Abstract The aim of this investigation was to study the distribution of arsenic species in human organs following fatal acute intoxication by arsenic trioxide. The collected autopsy samples of most organs were ground and dried, and the total arsenic was measured by electrothermal atomic absorption spectrometry (ETAAS). The arsenic species—inorganic arsenic, in the form of arsenite [As(III)] and arsenate [As(V)], and its metabolites [monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA)]—were quantified by ETAAS after extraction with methanol/water (1:1, by volume) and separation by HPLC.

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Maeda, Shigeru, Hiroshi Wada, Kosuke Kumeda, et al. "Methylation of inorganic arsenic by arsenic-tolerant freshwater algae." Applied Organometallic Chemistry 1, no. 5 (1987): 465–72. http://dx.doi.org/10.1002/aoc.590010512.

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Liu, Zhong-Gang, and Xing-Jiu Huang. "Voltammetric determination of inorganic arsenic." TrAC Trends in Analytical Chemistry 60 (September 2014): 25–35. http://dx.doi.org/10.1016/j.trac.2014.04.014.

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Hays, Sean M., Lesa L. Aylward, Michelle Gagné, Andy Nong, and Kannan Krishnan. "Biomonitoring Equivalents for inorganic arsenic." Regulatory Toxicology and Pharmacology 58, no. 1 (2010): 1–9. http://dx.doi.org/10.1016/j.yrtph.2010.06.002.

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