Arsenic Exposure and Effects in Humans: A Mini-Review in Brazil

Souza, Annaliza Carvalho Meneguelli de; Almeida, Marcelo Gomes de; Pestana, Inácio Abreu; Souza, Cristina Maria Magalhães de

doi:10.1007/s00244-018-00586-6

Cited by 20 publications

(4 citation statements)

References 57 publications

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“…The mobility and toxicity of As 3+ is far more than As 5+ and it is also considered to be lethal for plant and human on consumption [35][36][37] . The bacterial strain 3AB3 was identified for transforming toxic As 3+ to As 5+ and 5AB2 was identified to be converting As 5+ to As 3+ , which shows that isolated bacterial cells possess the mechanism to encounter arsenic toxicity and to overcome it.…”

Section: Discussionmentioning

confidence: 99%

Identification and Characterization of Arsenic Transforming Bacillus Species from Abandoned Mining Regions of Madhya Pradesh and Jharkhand

Bhardwaj¹,

Sharma²,

Singh³

2021

J Pure Appl Microbiol

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The arsenic (As) comprehensiveness in nature has aggravated the expansion of arsenic fortification and detoxification components in microorganisms. Many microorganisms discovered today with ability to oxidize arsenite (As3+) into arsenate (As5+) or reduce As5+ to As3+. In this study, two bacterial strains designated 3AB3 and 5AB2 was isolated from the soil samples collected from abandoned mining region of Madhya Pradesh and Jharkhand, India and arsenic concentration has been determined in both water and soil samples. Enrichment culturing method was employed for isolating bacteria and further they are screened for their redox ability. The isolated strains exhibited maximum growth at 30°C, at pH 7.0 in arsenic stressed Luria Bertani broth, checked through UV-Vis spectrophotometer at OD-620nm. Biochemical characterization of isolated strains was performed with various confirmation tests. Phylogenetic analysis of selected bacterial strains through MEGA-X confirmed their relationship to the genus Bacillus. Further, they are tested for transformation ability of arsenic (MSA method) and gene identification was done in selected isolated strains (PCR method). The result of this study shows that, even after abandoning the mining activities, concentration of arsenic increases in ground water by reducing ability of bacterial strains. PCR analysis depicted the presence of genes arsR, arsB and arsC in the strain 3AB3 and gene aoxB in 5AB2 respectively.

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Section: Discussionmentioning

confidence: 99%

Identification and Characterization of Arsenic Transforming Bacillus Species from Abandoned Mining Regions of Madhya Pradesh and Jharkhand

Bhardwaj¹,

Sharma²,

Singh³

2021

J Pure Appl Microbiol

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“…It is a metalloid that represents a major worldwide challenge to biodiversity and community health 2 . Arsenic is naturally found in both organic like arsenate [As(V)] and inorganic forms like arsenite [As(III)] 3 . Long-term exposure to this metalloid causes health problems, such as skin damage, circulatory system problems, and cancer by enhancing tumor growth 4 .…”

Section: Introductionmentioning

confidence: 99%

Silica and graphene mediate arsenic detection in mature rice grain by a newly patterned current–volt aptasensor

Uda

Gopinath

Hashim

et al. 2021

Sci Rep

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Arsenic is a major global threat to the ecosystem. Here we describe a highly accurate sensing platform using silica nanoparticles/graphene at the surface of aluminum interdigitated electrodes (Al IDE), able to detect trace amounts of arsenic(III) in rice grain samples. The morphology and electrical properties of fabricated Al IDEs were characterized and standardized using AFM, and SEM with EDX analyses. Micrometer scale Al IDEs were fabricated with silicon, aluminum, and oxygen as primary elements. Validation of the bare Al IDE with electrolyte fouling was performed at different pH levels. The sensing surface was stable with no electrolyte fouling at pH 7. Each chemical modification step was monitored with current–volt measurement. The surface chemical bonds were characterized by fourier transform infrared spectroscopy (FTIR) and revealed different peaks when interacting with arsenic (1600–1000 cm−1). Both silica nanoparticles and graphene presented a sensitive limit of detection as measured by slope calibration curves at 0.0000001 pg/ml, respectively. Further, linear regression was established using ΔI (A) = 3.86 E−09 log (Arsenic concentration) [g/ml] + 8.67 E−08 [A] for silica nanoparticles, whereas for graphene Y = 3.73 E−09 (Arsenic concentration) [g/ml] + 8.52 E−08 on the linear range of 0.0000001 pg/ml to 0.01 pg/ml. The R2 for silica (0.96) and that of graphene (0.94) was close to the maximum (1). Modification with silica nanoparticles was highly stable. The potential use of silica nanoparticles in the detection of arsenic in rice grain extract can be attributed to their size and stability.

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“…Arsenic is released into the environment by both natural processes (such as volcanic eruption and parent material weathering) and the consumption of arsenic-containing products (such as chemotherapeutic drugs, insecticides and wood preservatives) (Zhu et al, 2014;Bhowmick et al, 2018). Over 200 million people are currently affected by high groundwater arsenic pollution in several areas, including Bangladesh, Brazil, Canada, China, Hungary, India, Indonesia, Mexico, Pakistan, United States and Vietnam (Chakraborti et al, 2009;Rodriguez-Lado et al, 2013;Bhowmick et al, 2018;de Souza et al, 2018). Chronic exposure to arsenic has been documented to lead to cardiovascular, diabetic, reproductive, hematological, hepatic, neurological and respiratory diseases as well as to cause bladder, lung and skin cancers (Rahman et al, 2009;Carlin et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Microbial Oxidation of Arsenite: Regulation, Chemotaxis, Phosphate Metabolism and Energy Generation

Shi

Wang

2020

Front. Microbiol.

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Arsenic (As) is a metalloid that occurs widely in the environment. The biological oxidation of arsenite [As(III)] to arsenate [As(V)] is considered a strategy to reduce arsenic toxicity and provide energy. In recent years, research interests in microbial As(III) oxidation have been growing, and related new achievements have been revealed. This review focuses on the highlighting of the novel regulatory mechanisms of bacterial As(III) oxidation, the physiological relevance of different arsenic sensing systems and functional relationship between microbial As(III) oxidation and those of chemotaxis, phosphate uptake, carbon metabolism and energy generation. The implication to environmental bioremediation applications of As(III)-oxidizing strains, the knowledge gaps and perspectives are also discussed.

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Arsenic Exposure and Effects in Humans: A Mini-Review in Brazil

Cited by 20 publications

References 57 publications

Identification and Characterization of Arsenic Transforming Bacillus Species from Abandoned Mining Regions of Madhya Pradesh and Jharkhand

Identification and Characterization of Arsenic Transforming Bacillus Species from Abandoned Mining Regions of Madhya Pradesh and Jharkhand

Silica and graphene mediate arsenic detection in mature rice grain by a newly patterned current–volt aptasensor

Microbial Oxidation of Arsenite: Regulation, Chemotaxis, Phosphate Metabolism and Energy Generation

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