The ability of mineral dusts and fibres to initiate lipid peroxidation. Part I: parameters which determine this ability

Our plain-English summary of The ability of mineral dusts and fibres to initiate lipid peroxidation. Part I: parameters which determine this ability, by M. Gulumian (Redox Report, 1999).

The study

• Author: M. Gulumian
• Journal: Redox Report
• Published: 1999;4(4):141-63
• Type of article: Review
• Cited by: 7 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

In plain English

This article was a literature review, the first of two parts. It surveyed published laboratory, animal and human studies on whether mineral dusts and fibres, chiefly chrysotile, crocidolite and silica, can start lipid peroxidation, the oxidative breakdown of fats in cell membranes. It also covered the mineral surface properties that may drive this process. Among the studies reviewed, one found that chrysotile, crocidolite and amosite, in increasing order of activity, caused peroxidation in phospholipid emulsions. Another reported significantly higher plasma levels of malondialdehyde, a peroxidation marker, in workers exposed to asbestos than in workers exposed to silica dust. The review described how iron supplied by the minerals, either bound to the surface or released, and the minerals' ability to hold fats on their surfaces may each contribute. The author concluded that, because surface properties differ between minerals, the extent of lipid peroxidation and the products formed will vary from one kind of particle to another. The author noted that no systematic study had yet measured how much released versus surface-bound iron contributes.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Narrative literature review (Part I of a two-part review); no new data were collected
• Who was studied: Published in vitro studies (cells, tissues, lipid systems), animal studies (inhalation and intratracheal instillation, mainly rats) and some studies of exposed workers
• Exposure: Mineral dusts and fibres, mainly chrysotile, crocidolite and silica (including quartz); amosite and anthophyllite asbestos were also discussed
• Main results:
  • Reviewed study (Weitzman and Weitberg) in phospholipid emulsions: chrysotile, crocidolite and amosite, in increasing order of activity, induced peroxidation measured by malondialdehyde (MDA) production
  • Reviewed human study (Kamal et al.): plasma MDA levels were significantly higher among workers exposed to asbestos than among workers exposed to silica dust
  • Reviewed study (Shen et al.): 76% of the redox-active iron measured on the surface of crocidolite was in the Fe(II) (ferrous) form
  • Reviewed study (Gendek and Brody): crocidolite fibres adsorbed less lipid than chrysotile fibres but produced the same levels of lipid peroxidation
  • The author's synthesis: the minerals supply iron, either surface-bound or released into the surroundings, and provide surfaces on which lipids are adsorbed, both of which may contribute to lipid peroxidation
• The authors' conclusion: The author concluded that, because surface properties such as chemical composition, structure and microtopography differ between chrysotile, crocidolite and silica, the extent of lipid peroxidation and the types of products formed will vary from one kind of particle to another
• Limitations the authors state:
  • No systematic study had evaluated how much released (ligand-mobilized) versus surface-bound iron from crocidolite, chrysotile and silica contributes to starting lipid peroxidation
  • How iron-loaded and iron-depleted minerals differ in their activity towards lipids had not yet been investigated

Topics

The National Library of Medicine indexes this study under subjects our site covers: Chrysotile, Crocidolite.

Related studies

• Microsomal lipid peroxidation and oxy-radicals formation are induced by insoluble iron-containing minerals — M. Fontecave, M. Jaouen, et al. (1990)
• Potential toxicity of nonregulated asbestiform minerals: balangeroite from the western Alps. Part 2: Oxidant activity of the fibers — F. Turci, M. Tomatis, et al. (2005)
• Fibre-induced lipid peroxidation leads to DNA adduct formation in Salmonella typhimurium TA104 and rat lung fibroblasts — P.J. Howden, S.P. Faux (1996)
• Enhanced generation of free radicals from phagocytes induced by mineral dusts — V. Vallyathan, J.F. Mega, et al. (1992)
• Interrelationship between hemolysis and lipid peroxidation of human erythrocytes induced by silicic acid and silicate dusts — S.V. Singh, Q. Rahman (1987)
• The chemiluminescent response of human phagocytic cells to mineral dusts — I.P. Gormley, M.J. Kowolik, et al. (1985)

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