Cited by 492Chromium effects and bioremediationCarcinogens and Genotoxicity AssessmentHeavy Metal Exposure and Toxicity

Mechanisms of chromium-induced toxicity

Open access
DesMarias, Thomas Liborio, Costa, Max·2019·Current Opinion in Toxicology

Abstract

Chromium is a pervasive environmental contaminant that is of great importance because of its toxicity. Hexavalent chromium is a classified group 1 carcinogen with multiple complex mechanisms by which it triggers cancer development. Increased levels of oxidative stress, chromosome breaks, and DNA-adduct formation are some of the major mechanisms by which C(VI) causes cellular damage. Trivalent chromium is another species of chromium that is described as a non-essential metal, and is used in nutritional supplementation. Evidence on nutritional benefit is conflicting which could suggest that humans absorb enough Cr(III) from diet alone, and that extra supplementation is not necessary. This review highlights the differences between Cr(VI) and Cr(III) from a chemical and toxicological perspective, describes short-comings in nutritional research of Cr(III), and explains the multiple mechanisms by which Cr(VI) is involved in the process of carcinogenesis.

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Crossref · 10.1016/j.cotox.2019.05.003

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  • Cr(III) is generally non-toxic and is an essential agent in animal and human metabolisms.

    “Cr(III) is generally non-toxic and is an essential agent in animal and human metabolisms2.”

    From Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid (2022) · cites this paper as [2]

    In “Essentiality of Trivalent Chromium” (page not provided), the paper says Cr(III) should not be considered an essential trace element for human health and that no concrete mechanism establishes an essential role in any form of life. It also cautions that some Cr(III) supplement formulations may be toxic or carcinogenic, contrary to the unqualified description of Cr(III) as generally non-toxic. (LLM, conf=0.90)

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  • Cr(VI) is known to induce lung cancer, skin irritation, and damage to kidneys, livers, and gastric systems.

    “Cr(VI) is known to induce lung cancer, skin irritation, and damage to kidneys, livers, and gastric systems2,4.”

    From Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid (2022) · cites this paper as [2]

    The 'Mutagenic Vs non Mutagenic mode of action of Cr(VI)' section states that human and animal studies show chromate induces lung cancer, mainly through inhalation. Our copy does not substantiate the additional claims of skin irritation or kidney and gastric-system damage; its References mention Cr(VI) effects in liver cells, but do not establish the claimed liver damage. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Cr(VI) is hazardous to living organisms due to its mutagenicity and carcinogenicity.

    “However, Cr(VI) is hazardous to living organisms due to its mutagenicity and carcinogenicity2 and is among 129 critical pollutants identified by the US EPA3.”

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2 of the 79 references couldn’t be matched to a known paper.

Research works printed but not linked: 2

  1. [5]Wilbur S,, in Toxicological Profile for Chromium. 2012: Atlanta (GA). 24049864
  2. Journal NB, NBJ’s supplement business report. 2017, Penton Media San Diego, CA. This business analysis highlights the sales of various supplements across different demographics across the United States. It highlights increasing trends in chromium-containing supplement sales and other types of supplements overall.

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Authors
DesMarias, T. L., & Costa, M.
Affiliations
New York University (US)
Corresponding author
Costa, Max
Venue
Current Opinion in Toxicology
Publisher
Elsevier BV
Published
2019-04
Volume
14
Pages
1-7
ISSN
2468-2020 (ISSN-L)
OpenAlex
W2946723057
Cited by
492
References
79
Citations by year
2026: 67 · 2025: 74 · 2024: 93 · 2023: 89 · 2022: 79 · 2021: 55 · 2020: 30 · 2019: 4
FWCI
4.05
Type
journal article
Language
en
Open access
Locations
  • Current Opinion in Toxicology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Environmental Health Sciences
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Chromium effects and bioremediation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Heavy Metal Exposure and Toxicity
Keywords
chromium toxicity, hexavalent chromium, trivalent chromium, carcinogenesis, oxidative stress, DNA adducts, chromosome breakage, environmental pollutants, chromium supplementation

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