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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Bus, James S. |
| Description | Author Affiliation: Bus JS ( Exponent, Inc., 1800 Diagonal Road, Suite 500, Alexandria, VA 22314, United States. Electronic address: jbus@exponent.com.) |
| Abstract | The International Agency for Research on Cancer (IARC) has formulated 10 key characteristics of human carcinogens to incorporate mechanistic data into cancer hazard classifications. The analysis used glyphosate as a case example to examine the robustness of IARC's determination of oxidative stress as 'strong' evidence supporting a plausible cancer mechanism in humans. The IARC analysis primarily relied on 14 human/mammalian studies; 19 non-mammalian studies were uninformative of human cancer given the broad spectrum of test species and extensive use of formulations and aquatic testing. The mammalian studies had substantial experimental limitations for informing cancer mechanism including use of: single doses and time points; cytotoxic/toxic test doses; tissues not identified as potential cancer targets; glyphosate formulations or mixtures; technically limited oxidative stress biomarkers. The doses were many orders of magnitude higher than human exposures determined in human biomonitoring studies. The glyphosate case example reveals that the IARC evaluation fell substantially short of 'strong' supporting evidence of oxidative stress as a plausible human cancer mechanism, and suggests that other IARC monographs relying on the 10 key characteristics approach should be similarly examined for a lack of robust data integration fundamental to reasonable mode of action evaluations. |
| File Format | HTM / HTML |
| ISSN | 02732300 |
| Journal | Regulatory Toxicology and Pharmacology |
| Volume Number | 86 |
| e-ISSN | 10960295 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2017-03-06 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Pharmacology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Toxicology |
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