Abstract:
:The ability of amosite cored asbestos bodies isolated from human lungs to catalyse damage to phi X174 RFI DNA in vitro was measured and compared with that of uncoated amosite fibres with a similar distribution of length. Asbestos bodies (5000 bodies) suspended for 30 minutes in 50 mM NaCl containing 0.5 micrograms phi X174 RFI DNA, pH 7.5, did not catalyse detectable amounts of DNA single strand breaks. Addition of the reducing agent ascorbate (1 mM), however, resulted in single strand breaks in 10% of the DNA. Asbestos bodies in the presence of a low molecular weight chelator (1 mM) and ascorbate catalysed the formation of single strand breaks in 21% of the DNA with citrate or 77% with ethylenediamine tetra-acetic acid (EDTA), suggesting that mobilisation of iron may increase damage to DNA. Preincubation for 24 hours with desferrioxamine B, which binds iron (Fe (III)) and renders it redox inactive, completely inhibited the reactivity of asbestos bodies with DNA, strongly suggesting that iron was responsible. Amosite fibres (5000 fibres/reaction), with a similar length distribution to that of the asbestos bodies, did not catalyse detectable amounts of single strand breaks in DNA under identical reaction conditions. The results of the present study strongly suggest that iron deposits on the amosite core asbestos bodies were responsible for the formation of DNA single strand breaks in vitro. Mobilisation of iron by chelators seemed to enhance the reactivity of asbestos bodies with DNA. It has been postulated that the in vivo deposition of the coat material on to fibres may be an attempt by the lung defenses to isolate the fibre from the lung surface and thus offer a protective mechanism from physical irritation. These results suggest, however, that the iron that is deposited on asbestos fibres in vivo may be reactive, potentially increasing the damage to biomolecules, such as DNA, above that of the uncoated fibres.
journal_name
Occup Environ Medjournal_title
Occupational and environmental medicineauthors
Lund LG,Williams MG,Dodson RF,Aust AEdoi
10.1136/oem.51.3.200subject
Has Abstractpub_date
1994-03-01 00:00:00pages
200-4issue
3eissn
1351-0711issn
1470-7926journal_volume
51pub_type
杂志文章abstract:OBJECTIVES:To determine whether results from questionnaires, exposure measurements, and laboratory tests, commonly used in occupational health practice, can predict the presence or absence of sensitisation in workers exposed to high molecular weight (HMW) allergens. The study aims to develop and validate a diagnostic r...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.59.3.189
更新日期:2002-03-01 00:00:00
abstract:OBJECTIVES:The reason for the association between air pollution and risk of cardiovascular diseases is unknown. The hypothesis was examined that daily concentrations of air pollution are associated with daily concentrations of fibrinogen, a risk factor for cardiovascular disease. METHODS:Data on concentrations of plas...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.57.12.818
更新日期:2000-12-01 00:00:00
abstract:OBJECTIVES:Ammonium perfluorooctanoate (APFO) is a biopersistent surfactant used in the manufacture of several types of fluoropolymers. Based on previous findings of increased serum lipid levels associated with exposure to APFO, we evaluated ischaemic heart disease (IHD) mortality in a cohort of occupationally exposed ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2008.041582
更新日期:2009-10-01 00:00:00
abstract:OBJECTIVES:The aim was to assess the association between occupational biomechanical exposure and the occurrence of radial nerve entrapment (RNE) in construction workers over a 13-year follow-up period. METHODS:A cohort of 229 707 male construction workers who participated in a national occupational health surveillance...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2018-105311
更新日期:2019-05-01 00:00:00
abstract:OBJECTIVES:We investigated the relationship between urinary metabolites of di(2-ethylhexyl) phthalate (DEHP) and reproductive hormones in workers of polyvinyl chloride (PVC) production plants. After exposure, most of the DEHP is rapidly metabolised to mono(2-ethylhexyl) phthalate (MEHP), mono(2-ethyl-5-hydroxyhexyl) ph...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2014-102532
更新日期:2015-05-01 00:00:00
abstract:AIMS:To determine the cancer incidence in Swedish cabin crew. METHODS:Cancer incidence of cabin crew at the Swedish Scandinavian Airline System (SAS) (2324 women and 632 men) employed from 1957 to 1994 was determined during 1961-96 from the Swedish National Cancer Register. The cancer incidence in cabin crew was compa...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.60.11.810
更新日期:2003-11-01 00:00:00
abstract:OBJECTIVES:Chronic exposure to high levels of noise may be associated with increased risk of cardiovascular disease. We therefore undertook a quantitative retrospective exposure assessment using predictive statistical modelling to estimate historical exposures to noise among a cohort of 27,499 sawmill workers as part o...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,多中心研究
doi:10.1136/oem.2008.040881
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVES:To update mortality for 34 560 employees from diverse operating segments of a Canadian petroleum company; and to investigate potential relations with occupational factors. METHODS:Employees from 1964-83 were linked to the Canadian mortality data base to provide 11 years additional follow up. There were 6760...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.57.9.595
更新日期:2000-09-01 00:00:00
abstract:OBJECTIVES:Although occupational noise is a well known risk factor for hearing loss, little epidemiological evidence has been reported on its association with hearing loss in the general population, in part, because of the difficulty in exposure assessment. This study introduced a quantitative occupational noise exposu...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2011.064758
更新日期:2012-03-01 00:00:00
abstract:OBJECTIVES:To elucidate factors contributing to hard metal asthma, the entire workforce of a corporation producing hard metal tools (n = 703) was examined. METHODS:The variables evaluated were the atopy reflected by immunoglobulin E (IgE) antibody against mite allergen, history of exposure to hard metal, smoking, conc...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.53.3.188
更新日期:1996-03-01 00:00:00
abstract:OBJECTIVES:To obtain knowledge about the use and distribution of hazardous chemicals in Danish industry. This knowledge is used to regulate the occupational environment and prevent hazardous exposure. METHODS:A national survey on the use of chemicals was carried out in 1989 in a stratified sample of 1448 Danish busine...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.52.7.454
更新日期:1995-07-01 00:00:00
abstract:OBJECTIVES:Trichloroethylene (TCE) -induced hypersensitivity syndrome (TIHS) is a potentially life-threatening disease. Several genetic susceptibility biomarkers have been found to be associated with TIHS, and this systematic prospective study has been conducted to evaluate the utility of these genetic susceptibility b...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2019-106171
更新日期:2020-03-01 00:00:00
abstract:OBJECTIVES:To appraise epidemiological evidence of the purported association between residential exposure to power frequency magnetic fields and adult cancers. METHODS:Literature review and epidemiological evaluation. RESULTS:Seven epidemiological studies have been conducted on the risk of cancer among adults in rela...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,评审
doi:10.1136/oem.53.8.505
更新日期:1996-08-01 00:00:00
abstract::Mortality data have been updated for a further 12 years for a cohort of workers in the reinforced plastics and composites industry with exposures to styrene monomer and other chemicals. The cohort consisted of 15,826 male and female employees who were exposed to styrene for at least six months between 1948 and 1977 at...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.51.6.386
更新日期:1994-06-01 00:00:00
abstract:OBJECTIVES:The aim of the study was to determine whether self-reported occupational exposure to cleaning/disinfecting agents in hospital workers is accurate, in comparison to expert assessment, taken to be the gold standard. METHODS:In the Epidemiological Study of the Genetics and Environment of Asthma (EGEA), partici...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2010.061671
更新日期:2011-08-01 00:00:00
abstract:OBJECTIVES:To review and summarise the epidemiological evidence on the carcinogenicity of occupational exposure to inorganic lead. METHODS:Case-control and cohort studies were reviewed and combined for meta-analysis. Fixed and random effect methods were used to estimate the summary effects. RESULTS:The combined resul...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,meta分析
doi:10.1136/oem.52.2.73
更新日期:1995-02-01 00:00:00
abstract:OBJECTIVE:To assess whether the increased risk of disease related to asbestos in occupations from the construction and engineering industries applies equally to pleural cancer, peritoneal cancer, and asbestosis. METHODS:Analysis was based on deaths among men aged 20-74 in England and Wales during 1979-80 and 1982-90. ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.52.11.775
更新日期:1995-11-01 00:00:00
abstract:OBJECTIVES:To examine the relationship between protease exposure and respiratory disease in a cohort of detergent enzyme manufacturers. METHODS:Case-referent analysis of a cohort of employees working in a European detergent factory between 1989 and 2002. Cases with new lower or upper respiratory disease were ascertain...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2008.043851
更新日期:2009-11-01 00:00:00
abstract:OBJECTIVE:Several animal, fish and/or shellfish derived substances encountered in the workplace can initiate or exacerbate asthma. The aims of this study were: to produce a population-based estimate of the current prevalence of occupational exposure to animal, fish and/or shellfish derived asthmagens, to identify the m...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2017-104459
更新日期:2018-04-01 00:00:00
abstract:BACKGROUND:The erection of mobile telephone base stations in inhabited areas has raised concerns about possible health effects caused by emitted microwaves. METHODS:In a cross-sectional study of randomly selected inhabitants living in urban and rural areas for more than one year near to 10 selected base stations, 365 ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2005.020784
更新日期:2006-05-01 00:00:00
abstract:OBJECTIVES:Epidemiological studies have shown inconsistent effects on immunological parameters in subjects exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). In this study we investigated changes in humoral immunity and prevalence of atopic diseases among workers from a Dutch historical cohort occupationally expose...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2010.058016
更新日期:2011-06-01 00:00:00
abstract:OBJECTIVES:Few studies have examined whether exposure to chlorinated solvents is associated with multiple myeloma. We evaluated associations between multiple myeloma and occupational exposure to six chlorinated solvents: 1,1,1-trichloroethane, trichloroethylene (TCE), methylene chloride (DCM), perchloroethylene, carbon...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2009.054809
更新日期:2011-06-01 00:00:00
abstract::Fungal corneal ulcers related to agriculture has been reported throughout the world, especially in tropical areas. Most of them were sporadic and had histories of ocular trauma or use of topical corticosteroids and topical antibiotics. Five onion harvesters had fungal corneal ulcers during the same harvest period in S...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.56.6.423
更新日期:1999-06-01 00:00:00
abstract:OBJECTIVE:The Stand Back study evaluated the feasibility and effects of a multicomponent intervention targeting reduced prolonged sitting and pain self-management in desk workers with chronic low back pain (LBP). METHODS:This randomised controlled trial recruited 27 individuals with chronic LBP, Oswestry Disability In...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,随机对照试验
doi:10.1136/oemed-2017-104732
更新日期:2018-05-01 00:00:00
abstract::Respiratory symptoms and ventilatory capacity were studied in a group of 288 workers (259 women and 29 men) employed in a confectionery plant. A group of workers (96 women and 31 men) not exposed to confectionery manufacture were also studied as controls. The prevalence of chronic respiratory symptoms was higher in ex...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.51.7.435
更新日期:1994-07-01 00:00:00
abstract:OBJECTIVES:There is growing evidence of an association between low-dose external γ-radiation and circulatory system diseases (CSDs), yet sparse data exist about an association with chronic internal uranium exposure and the role of non-radiation risk factors. We conducted a nested case-control study of French AREVA NC P...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2017-104575
更新日期:2018-04-01 00:00:00
abstract:OBJECTIVES:(1) To investigate the association between temperature and work-related injuries and (2) to identify groups of workers at high risk of work-related injuries in hot environments in Adelaide, South Australia. METHODS:Workers' compensation claims in Adelaide, South Australia for 2001-2010 were used. The relati...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2013-101584
更新日期:2014-04-01 00:00:00
abstract:OBJECTIVES:While several studies have reported associations of daily exposures to PM2.5 (particles less than 2.5 µm) with mortality, few studies have examined the impact of its constituents such as black carbon (BC), which is also a significant contributor to global climate change. METHODS:We assessed the association ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2014-102184
更新日期:2015-02-01 00:00:00
abstract:OBJECTIVES:Rhinitis is common, but the risk factors are not well described. To investigate the association between current rhinitis and pesticide use, we used data from 2245 Iowa commercial pesticide applicators in the Agricultural Health Study. METHODS:Using logistic regression models adjusted for age, education and ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2008.041798
更新日期:2009-11-01 00:00:00
abstract:OBJECTIVE:To investigate possible neurotoxic effects in groups of aluminium pot room and foundry workers, aluminium welders, and a small group of workers exposed to aluminium in the production of flake powder. METHODS:Exposure to aluminium was evaluated with aluminium concentrations in blood and urine as well as a que...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.58.7.453
更新日期:2001-07-01 00:00:00