Immunotoxicology

Our plain-English summary of Immunotoxicology, by K. Miller (Clinical and Experimental Immunology, 1985).

The study

• Author: K. Miller
• Journal: Clinical and Experimental Immunology
• Published: 1985;61(2):219-23
• Type of article: Review
• Cited by: 5 articles, as counted by NIH iCite
• Read it: PubMed · Free full text

Summary of the article

This review, written at the British Industrial Biological Research Association, surveyed immunotoxicology, drawing on workshops and international meetings held between 1980 and 1984, including a 1984 International Seminar in Luxembourg. The author described the field as the study of adverse immune effects of xenobiotics and immunotherapeutic agents, allergenicity and autoimmunity caused by such exposures, and the use of immunological techniques in toxicology. The review discussed whether immune suppression by chemicals, many of them carcinogens, might contribute to cancer. Human examples included benzidine manufacturing workers, Michigan residents exposed to polybrominated biphenyls, and TCDD. Asbestos-associated disease was presented as a special case. Animal studies showed that asbestos effects on alveolar macrophages could produce sensitized T lymphocytes. Most clinical studies suggested impaired T lymphocyte function in people with asbestosis or pleural plaques. Studies of mesothelioma patients gave somewhat conflicting results but generally showed moderate to severe immune suppression. The author noted that studies of exposed human populations would have to be very large and long, and cited increased cancers in immunosuppressed patients. Other topics were drug-induced autoimmunity, biological response modifiers and monoclonal antibodies, and testing for contact hypersensitivity. The review also described two approaches to animal immunotoxicity testing: lymphoreticular histopathology in rats, used by the Dutch National Institute of Health, and functional and host-resistance assays in mice, under the US National Toxicology Program. The author concluded that the ideal assessment was still evolving. The review reported the Luxembourg Seminar's recommendation that validating and developing immunotoxicological methods be given priority, and called for cooperation between scientific institutions and industry.

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 1985 article was a review, not an original study. The author surveyed immunotoxicology, the study of harmful immune effects of chemicals and other foreign substances. The review drew on published animal and human research and on international meetings held between 1980 and 1984. One paragraph addressed asbestos. The author reported that experimental studies had consistently shown that the effect of asbestos on alveolar macrophages can lead to the production of sensitized T lymphocytes. The author also reported that most clinical studies suggested impaired T lymphocyte function in people who developed asbestosis or pleural plaques after occupational exposure. Studies of patients with asbestos-associated mesothelioma were described as somewhat conflicting but generally showing moderate to severe immune suppression. The idea that asbestos might alter immune responses in ways that make the body more susceptible to its cancer-causing potential was presented as a suggestion, not a finding. The author noted that studies of exposed populations would need to be very large, complex and long. The author called for priority research on immune testing methods and for cooperation between scientific institutions and industrial laboratories.

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: Review article (no original data); summarizes published animal and human studies and international meetings on immunotoxicology
• Who was studied: No study population of its own; the review drew on published animal and human studies and on workshops and seminars held in Arlington (1980), Guildford (1982), Research Triangle Park (1983) and Luxembourg (1984)
• Exposure: Xenobiotics (foreign chemicals), immunotherapeutic agents, drugs and allergens in general; asbestos (fiber type not specified in the text) was discussed in one paragraph as a special case
• Main results:
  • The author reported that experimental studies (cited, not carried out in this article) had consistently shown that the effect of asbestos on alveolar macrophages can result in the production of sensitized T lymphocytes
  • The author reported that most clinical studies cited suggested impaired T lymphocyte function in people who had developed asbestosis or pleural plaques after occupational exposure
  • The author described studies of patients with asbestos-associated mesothelioma as somewhat conflicting, but generally showing moderate to severe immune suppression
  • The author reported that immunotoxicologists had suggested that asbestos exposure might alter immune responses in ways that make the host more susceptible to the cancer-causing potential of asbestos itself; this was presented as a suggestion, not a demonstrated finding
  • The author reported a suggestion that mesothelioma patients with normal immune function may have tumors that stimulate an immune response, and that immune participation may confer increased survival in that group
• The authors' conclusion: Citing the Luxembourg seminar's recommendation that research to validate and develop immunotoxicology methods be given priority, the author concluded that scientific institutions and industrial laboratories need to cooperate in developing and choosing procedures for immune assessment
• Limitations the authors state:
  • The author stated that there were few studies showing that exposure to toxic chemicals produces immune-related cancer effects in humans
  • The author stated that studies of populations exposed at levels that could alter immune regulation would have to be very large, complex and long

Topics

Medical terms in this study, explained in our Lexicon: Alveolar Macrophage, Pleural Plaques, Mesothelioma, Monoclonal, Histopathology.

Related studies

• A dual role for the immune response in a mouse model of inflammation-associated lung cancer — M. Dougan, D. Li, et al. (2011)
• Analysis of depressed cell-mediated immunity in asbestos workers — R.D. deShazo, J. Nordberg, et al. (1983)
• Manifestations of cellular immunity in the rat after prolonged asbestos inhalation. II. Alveolar macrophage-induced splenic lymphocyte proliferation — K. Miller, E. Kagan (1981)
• Keynote lecture in the 13th Japanese Society of Immunotoxicology (JSIT 2006) : -Pathophysiological Development and Immunotoxicology: what we have found from research related to silica and silicate such as asbestos- — T. Otsuki, Y. Miura, et al. (2007)
• Cytokine-armed vaccinia virus infects the mesothelioma tumor microenvironment to overcome immune tolerance and mediate tumor resolution — C. Jackaman, D.J. Nelson (2010)
• Are macrophages, myeloid derived suppressor cells and neutrophils mediators of local suppression in healthy and cancerous tissues in aging hosts? — C. Jackaman, D.J. Nelson (2014)

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