| Literature DB >> 4364384 |
J C Wagner, G Berry, J W Skidmore, V Timbrell.
Abstract
Two experiments in which SPF Wistar rats were exposed by inhalation to dust clouds of the UICC standard reference samples for periods of between one day and 2 years are described. All the samples of asbestos produced asbestosis which continued to progress after removal from exposure but only a little fibrosis was observed in control rats. Lung tumours, ranging in severity from adenomata to squamous carcinomata, were produced by all samples but in the controls there were only a few adenomata and none of the more serious tumours. Of the 20 tumours which metastasized, 16 occurred after exposure to one or other of the 2 chrysotile samples. In addition, a total of 11 mesotheliomata occurred, 4 of which were with crocidolite and 4 with Canadian chrysotile. Two of the mesotheliomata occurred with only one day's exposure to asbestos. There was a positive association between asbestosis and lung tumours.Entities:
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Year: 1974 PMID： 4364384 PMCID： PMC2009089 DOI： 10.1038/bjc.1974.65
Source DB: PubMed Journal: Br J Cancer ISSN： 0007-0920 Impact factor: 7.640