Introduction: INSERM-IARC-CNRS workshop on biopersistence of respirable synthetic fibers and minerals

Our plain-English summary of Introduction: INSERM-IARC-CNRS workshop on biopersistence of respirable synthetic fibers and minerals, by J. Bignon, R. Saracci, J.C. Touray (Environmental Health Perspectives, 1994).

The study

• Authors: J. Bignon, R. Saracci, J.C. Touray
• Journal: Environmental Health Perspectives
• Published: 1994;102 Suppl 5(Suppl 5):3-5
• Cited by: 12 articles, as counted by NIH iCite
• Read it: PubMed · Publisher · Free full text

Summary of the article

This introduction to the proceedings of the INSERM-IARC-CNRS workshop on biopersistence of respirable synthetic fibers and minerals outlined the background to the meeting and summarized its sessions. The workshop was held at the International Agency for Research on Cancer in Lyon, France, in September 1992, and some 150 specialists attended. The authors reviewed earlier findings that fiber length and diameter influence carcinogenicity, and that the most biopersistent fibers appeared to have the highest fibrogenic or carcinogenic potential. They noted that in lung tissue from people who died with mesothelioma after exposure to mixed amphibole and chrysotile asbestos, amphibole fibers were usually retained in greater amounts, even when chrysotile had been dominant. Human mesothelioma was more often associated with amphibole exposure, whereas rat inhalation and cell culture studies found the two types about equally carcinogenic. They described processes affecting persistence, including deposition, clearance, translocation, breakage, splitting, leaching and dissolution, and uncertainty about pH in body fluids. The sessions covered three areas: in vitro tests, where dissolution rates for the same fiber differed between laboratories by as much as a factor of two; animal experiments and analytical techniques; and relevance to human disease. The authors called for a renewed hazard classification of synthetic fibers. They identified cellulose fibers used as asbestos substitutes as a research gap.

PubMed has no abstract for this study, and the article doesn't print one. We wrote this summary from the full article with the help of AI. It is not the authors' wording.

In plain English

This article is the introduction to the published proceedings of a workshop on the biopersistence of respirable synthetic fibers and minerals. Biopersistence means how long fibers stay in the lung. The workshop was held in September 1992 in Lyon, France, with some 150 participants. The article is not an original study; it summarizes others' research and findings presented at the workshop. Drawing on earlier research, the authors described a generalized concept: a fiber of critical dimensions will be carcinogenic, meaning able to cause cancer, if durable enough to stay chemically and physically intact in lung tissue in close contact with target cells. From the workshop sessions, the introduction reported that laboratories measuring how fast a given fiber dissolved got poorly matching results, differing by as much as a factor of two. Tests using cell cultures were probably better able to predict durability in living animals. Preparing fibers for microscope examination could change their chemical makeup. The authors called for a renewed classification of synthetic fibers by fibrogenic and carcinogenic hazard. They named cellulose fibers used as asbestos substitutes as a gap in research.

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: Introduction to workshop proceedings (narrative overview of background research and of the workshop sessions); not an original study
• Who was studied: No study population; describes a workshop of some 150 specialists held at the International Agency for Research on Cancer in Lyon, France, in September 1992
• Exposure: Biopersistence of natural mineral fibers (including chrysotile and amphibole asbestos such as crocidolite, amosite and tremolite) and synthetic fibers, including man-made vitreous fibers (rockwool, slagwool, glasswool, ceramic fibers, glass filament) and cellulose fibers
• Main results:
  • Background from earlier research by others, not new data: the authors described a generalized concept. Under it, a fiber of critical dimensions will be carcinogenic if durable enough to stay chemically and physically intact in lung tissue in close contact with target cells.
  • Reported from the first workshop session: for a given fiber in the same solution, dissolution rates were poorly reproducible between laboratories, varying by as much as a factor of two
  • Reported from the first workshop session: tests using cell cultures were probably better able to predict biodurability in living animals
  • Reported from the second workshop session: preparing fibers for electron microscopy could change their elemental composition
• The authors' conclusion: The authors stated there should be a renewed classification of synthetic fibers according to their fibrogenic and carcinogenic hazard. They identified cellulose fibers used as asbestos substitutes in reinforced cement and building insulation as a research gap.

Topics

Medical terms in this study, explained in our Lexicon: IARC, biopersistence, Fiber Length, Fibrogenic, Carcinogenic, Mesothelioma, Amphibole Group, Chrysotile.

Related studies

• An experimental approach to the evaluation of the biopersistence of respirable synthetic fibers and minerals — D.M. Bernstein, R. Mast, et al. (1994)
• Biopersistence of respirable synthetic fibers and minerals: point of view of the chest physician — P. De Vuyst (1994)
• Biopersistence of respirable synthetic fibers and minerals: the point of view of the epidemiologist — P. Boffetta (1994)
• In vitro assays to predict the pathogenicity of mineral fibers — B.T. Mossman, A.M. Sesko (1990)
• Patterns of histopathological change determined by the point counting method and its application for the hazard assessment of respirable dust — A. Ogami, Y. Morimoto, et al. (2004)
• Separation and characterization of respirable amphibole fibers from Libby, Montana — J.S. Webber, D.J. Blake, et al. (2008)

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