Heavy Metals and Low-Oxygen Microenvironment—Its Impact on Liver Metabolism and Dietary Supplementation

Das, Kusal K.; Honnutagi, Rajesh; Mullur, Lata; Reddy, R Chandramouli; Das, Swastika; Majid, Dewan S. A.; Biradar, Mallanagouda S.

doi:10.1016/b978-0-12-814466-4.00026-4

Cited by 10 publications

(3 citation statements)

References 83 publications

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“…The presence of heavy metals in the environment has been a source of concern over the past few decades due to their persistence, potential harm and toxicological hazards [2]. Besides the fact that they are non-biodegradable, they may also undergo microbial or chemical transformation [8,9,11,12]. Recently, Hasani et al [13] and Nath et al [3] reported that heavy metal polluted environments activate co-selection process and cause a decrease in microbial tolerance to antibiotics due to their ability to co-regulate genes responsible for antibiotic resistance.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

et al. 2019

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Heavy metals polluted soils have turned out to be a common environmental problem across the globe due to their toxic effects and accumulation through the food chain. Heavy metals have lethal effects on all forms of life. For instance, plants grown on heavy metal polluted soil show a reduction in growth and yields. A surge in anthropogenic activities and industrial operations has substantially increased the level of heavy metal pollution and release into the environment; hence, there is need to remediate these heavy metal pollutants. Biosorption is an efficient, economical, ecofriendly and convenient techniques of remediating heavy metal polluted soils. It is a widely accepted method that utilizes biomaterials such as natural biomass as biosorbents. The current study was based on the biosorption of copper, chromium, cadmium and nickel polluted soil using bacteria and fungi isolated from soil. Bacterial species isolated were Pseudomonas, Bacillus, Micrococcus, Escherichia, Streptococcus, Enterobacter and Staphylococcus while fungi isolated were Aspergillus niger, Penicillium notatum and Aspergillus flavus. The isolated bacteria were screened for potential to biosorb copper and chromium likewise fungi for cadmium and nickel. Biosorption rate was determined using atomic absorption spectrophotometry. Five milliliters each of a-day-old culture of the screened bacteria and fungi was inoculated into 45 ml of nutrient broth (bacteria) and potato dextrose broth (fungi) having concentrations of 5, 10, 15 and 20 ppm, respectively, of copper, chromium, cadmium and nickel. The conical flasks were incubated at a temperature of 37 °C and 28 °C ± 2 for bacteria and fungi, respectively, for a period of 35 days of inoculation. For the bacterial isolates, the highest biosorption rates of chromium (89.67%) and copper (90.89%) by Pseudomonas aeruginosa were observed at 20 ppm on day 21 and 15 ppm on day 14, respectively, while for the fungi isolates, P. notatum showed highest biosorption rate for cadmium at 10 ppm with 77.67%. Aspergillus niger showed highest biosorption rate for nickel with 81.07% after 28 days of incubation. The results of this study revealed the ability of Pseudomonas aeruginosa to biosorb copper and chromium and also A. niger and P. notatum to biosorb cadmium and nickel from the environment and can be developed for the biosorption of soils polluted with copper, chromium, cadmium and nickel.

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Section: Introductionmentioning

confidence: 99%

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

et al. 2019

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“…With the exception of Hg, which can undergo chemical change in the liver, rumen and digestive tract, most elements may be stored within the body after ingestion but are not chemically changed through metabolism in the liver or kidney. In this regard, many trace elements are detectable in their original form within excreta (Das et al, 2019). This study presents the first quantitative assessment and comparison of multiple PTEs in herbivorous, omnivorous and carnivorous terrestrial mammals in a mesic and arid protected area of South Africa, using faeces as a non-invasive matrix.…”

Section: Discussionmentioning

confidence: 99%

Non-Lethal Assessment of Potentially Toxic Elements Across Mammalian Trophic Levels in African Savannahs

Webster

Callealta

Bennett

et al. 2022

Front. Environ. Sci.

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South Africa is one of the most diverse countries in the world but the increase in agricultural, industrial and technological development to meet the needs of the growing human population has led to increased amounts of potentially toxic elements (PTEs) and other chemicals in the environment. As regional and global environmental processes influence local conditions to differing degrees, all organisms within a specific environment are exposed to highly complex, ill-defined PTE and chemical mixtures. Differences in feeding strategies within and between vertebrate trophic levels are likely to influence the degree to which individuals may be exposed to and affected by PTE presence. Using vertebrate faeces as a biological matrix, we investigate and compare quantitative differences in PTE concentrations in herbivorous, omnivorous and carnivorous terrestrial vertebrates from two protected areas in South African savannah. Of the eleven PTEs assessed [aluminium (Al), arsenic (As), barium (Ba), cadmium (Cd), chromium (Cr), mercury (Hg), lead (Pb), antimony (Sb), tin (Sn), strontium (Sr), and vanadium (V)], the highest concentrations of Al, As, Cr, Pb, Sn, and V were found in carnivores. General patterns were evident between groups at each site for specific elements, but absolute values for the same elements were site-specific. This is the first study to non-invasively examine and compare PTE concentrations in a variety of free-ranging mammalian wildlife occupying different trophic levels within South African protected areas. Our results confirm that all individuals across trophic levels within these sites are exposed to multiple and varied PTE mixtures on a continuous basis. Whether PTEs at these concentrations cause synergistic or antagonistic disruption of physiological and biological systems alone or in combination in free-ranging African wildlife species is still unclear and requires further investigation.

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“…Деякі вчені використовують інші визначення (латентна, компенсована, декомпенсована, летальна). За локалізацією діляться на ге-нералізовану, якщо вона охоплює все тіло, або локальну, якщо охоплює тільки певний регіон тіла [31]. Використовуються й інші класифікації гіпоксії, наприклад за часом перебігу -блискавична, гостра та хронічна.…”

Section: види гіпоксіїunclassified

The Role of Hypoxia in the Development of Some Pathological Conditions and Malignant Tumors

Bogdanova¹,

Pogorela²,

Lukyanetz³

2021

Fiziol Zh

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Hypoxia, which could be defined as the level of oxygen tension in the body that is below the normal physiological value, is a process that is often observed in several diseases and occurs in most malignant tumors. On the other hand, in hypoxia several pathological conditions could occur, which could be caused by external and internal factors. During carcinogenesis, hypoxia may promote metastasis and an unfavorable prognosis. When infected with COVID-19, there is a «silent hypoxia», which could asymptomatically destroy the body. The review is devoted to hypoxia’s role in the development of some pathological conditions and malignant tumors.

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Heavy Metals and Low-Oxygen Microenvironment—Its Impact on Liver Metabolism and Dietary Supplementation

Cited by 10 publications

References 83 publications

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

Non-Lethal Assessment of Potentially Toxic Elements Across Mammalian Trophic Levels in African Savannahs

The Role of Hypoxia in the Development of Some Pathological Conditions and Malignant Tumors

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