Abstract:
:Urinary N-acetyl-beta-D-glucosaminidase (NAG) had been shown to be a useful early marker of renal injury. In workers exposed to lead it seems to be the only early marker but the dose response and dose effect relations are weak. Furthermore, the significance and underlying mechanism of increased urinary NAG activity is far from clear. By studying the isoenzyme profiles of urinary NAG, the significance and underlying mechanism may be further clarified. The heat labile (NAG-A) and heat stable (NAG-B) isoenzyme profiles of 128 workers exposed to lead from a lead stabiliser factory were analysed. NAG activity was expressed as total NAG, NAG-A, and NAG-B activity as well as ratios (NAG-B/total NAG and NAG-B/NAG-A). Exposure indices included the recent concentration of blood lead (BPb), a cumulative blood lead index (TBPb), and the recent change in concentration of blood lead (CBPb). The NAG indices correlated best with CBPb. Nearly 50% of the variation in NAG-B activity could be explained by the combination of all three exposure indices but only the CBPb was highly significant. When these exposure indices were entered separately into the regression equation, CBPb accounted for 36.3% of the variation in NAG-B activity, 5.7% was accounted for by TBPb and 2.7% by BPb. There was also no dose-effect or dose-response relation between the NAG variables and BPb or TBPb groups. With CBPb, there were dose-effect and dose-response relations. With CBPb, there was an increase in NAG variables in the group with more than 25% increase in blood lead over the past six months. The increase in NAG activity in this study is likely to be due to a recent increase in concentration of blood lead and hence presumably a recent rise in renal burden of inorganic lead. This suggests that the increase in urinary NAG activity is a form of acute response to a sharp increase in renal burden of lead, rather than to a cumulative dose. Heat stable NAG is part of the lysosomal membrane and is present in the urine when there is breakdown of lysosomes. Our data therefore contradict suggestions that the increase in urinary NAG activity is due to exocytosis.
journal_name
Occup Environ Medjournal_title
Occupational and environmental medicineauthors
Chia KS,Mutti A,Tan C,Ong HY,Jeyaratnam J,Ong CN,Lee Edoi
10.1136/oem.51.2.125subject
Has Abstractpub_date
1994-02-01 00:00:00pages
125-9issue
2eissn
1351-0711issn
1470-7926journal_volume
51pub_type
杂志文章abstract::The International Agency for Research on Cancer has classified occupational exposure as a painter as 'carcinogenic to humans', largely based on increased risks of bladder and lung cancer. A meta-analysis, including more than 2900 incident cases or deaths from bladder cancer among painters reported in 41 cohort (n=2), ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,评审
doi:10.1136/oem.2009.051565
更新日期:2010-08-01 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
abstract:OBJECTIVES:To evaluate the risk of cancer and other diseases among workers engaged in aircraft manufacturing and potentially exposed to compounds containing chromate, trichloroethylene (TCE), perchloroethylene (PCE), and mixed solvents. METHODS:A retrospective cohort mortality study was conducted of workers employed f...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.56.9.581
更新日期:1999-09-01 00:00:00
abstract:OBJECTIVES:Prevention of disability in the ageing workforce is essential for sustaining economic growth in Europe. In order to provide information on entry points for preventive measures, it is important to better understand sociodemographic, socioeconomic and work-related determinants of disability in older employees....
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2012-100924
更新日期:2013-03-01 00:00:00
abstract:OBJECTIVE:Diazinon, a common organophosphate insecticide with genotoxic properties, was previously associated with lung cancer in the Agricultural Health Study (AHS) cohort, but few other epidemiological studies have examined diazinon-associated cancer risk. We used updated diazinon exposure and cancer incidence inform...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2014-102728
更新日期:2015-07-01 00:00:00
abstract:OBJECTIVES:To investigate the question of whether there is an association between workplace exposures and sociodemographic factors and mortality from non-malignant respiratory disease excluding influenza and pneumonia (NMRDxIP) among workers in a fibreglass wool manufacturing facility. METHODS:A case-control study wit...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.59.6.369
更新日期:2002-06-01 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:OBJECTIVES:Shift-related sleep and sleepiness problems may be due to characteristics of both shifts (ie, day, evening and night shifts) and work schedules (ie, permanent vs rotational schedules). The Bergen Shift Work Sleep Questionnaire (BSWSQ) was used to investigate associations between shift-related sleep problems ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2012-101091
更新日期:2013-04-01 00:00:00
abstract:AIMS:To examine the relation between the psychosocial work environment and the perceived indoor air problems measured by a questionnaire survey; and to discuss the role of a questionnaire as a means to enhance collaboration in the challenging multiprofessional process of solving indoor air problems. METHODS:The resear...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,多中心研究
doi:10.1136/oem.2002.005835
更新日期:2004-02-01 00:00:00
abstract:OBJECTIVES:Compare rates of medical insurance claims for musculoskeletal disorders (MSD) between workers in a construction trade and a general worker population to determine if higher physical exposures in construction lead to higher rates of claims on personal medical insurance. METHODS:Health insurance claims betwee...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2014-102313
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVES:Many residents in Beijing use disposable face masks in an attempt to protect their health from high particulate matter (PM) concentrations. Retail masks may be certified to local or international standards, but their real-life performance may not confer the exposure reduction potential that is marketed. This...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2017-104765
更新日期:2018-06-01 00:00:00
abstract:BACKGROUND:Office computer workers are at increased risk for neck/upper extremity (UE) musculoskeletal pain. METHODS:A seven-month office ergonomic intervention study evaluated the effect of two engineering controls plus training on neck/UE pain and mechanical exposures in 113 computer workers, including a 3-month fol...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,随机对照试验
doi:10.1136/oemed-2014-102160
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND:Previous studies of the risk of heart disease after shift work reached different estimates and review authors disagree about the validity of some of the studies. A cross sectional study showed that shift workers had a higher prevalence of nearly every unfavourable work environment factor investigated. Confli...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2006.026716
更新日期:2006-07-01 00:00:00
abstract:OBJECTIVES:This paper describes findings from the study of chronic bronchitis (CB) incidence after occupational exposure to ionising radiation among workers employed at Russian Mayak Production Association (PA) during 1948 and 1982 and followed up until 2008 based on 'Mayak Worker Dosimetry System 2008'. METHODS:Analy...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2015-103283
更新日期:2017-02-01 00:00:00
abstract:INTRODUCTION:The current definition of chronic obstructive pulmonary disease (COPD) associates persistent airflow limitation and chronic respiratory symptoms. Agricultural work has been associated with an increased risk of developing COPD, but the prevalence and definition of the disease vary greatly between studies. T...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,meta分析
doi:10.1136/oemed-2018-105310
更新日期:2019-01-01 00:00:00
abstract:OBJECTIVE:To evaluate the effectiveness of a self-management intervention (including an eHealth module), compared with usual care, in employees with chronic non-specific complaints of the arm, neck or shoulder (persisting >3 months). METHODS:Participants were randomised into the self-management group (SG) or usual car...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,随机对照试验
doi:10.1136/oemed-2015-103089
更新日期:2015-12-01 00:00:00
abstract:AIMS:To correlate the prevalence of respiratory tract symptoms and diseases with dust and fibre exposure in the soft tissue industry in Germany. METHODS:Ambient monitoring was performed for inhalable, respirable dust and fibres in seven soft tissue producing factories. In 441 workers (72 controls, 90 moderate, 279 hig...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.59.12.830
更新日期:2002-12-01 00:00:00
abstract::Male Wistar rats were exposed to two types of magnesium sulphate whiskers by inhalation for six hours a day, five days a week, for four weeks (sub-chronic study), or for one year (chronic study) to clarify the biological effects of the whiskers. There were few whiskers detected in the rat lungs even at one day after t...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.51.7.492
更新日期:1994-07-01 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:Long working hours may be associated with cardiovascular disease (CVD). The objective was to investigate cross-sectional associations of work hours with carotid intima-media thickness (CIMT) and ankle-brachial index (ABI). METHODS:Participants were 1694 women and 1868 men from the Multi-Ethnic Study of Athe...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2012-100665
更新日期:2012-10-01 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:INTRODUCTION:This study estimated the prevalence of spirometry-defined airflow obstruction and coal workers' pneumoconiosis (CWP) among never-smoking coal miners participating in the National Institute for Occupational Safety and Health (NIOSH) Coal Workers' Health Surveillance Program (CWHSP). METHODS:Data were from ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2019-106213
更新日期:2020-04-01 00:00:00
abstract::Complex and dynamic physiologic processes underlie the exposure-response relations that occupational and environmental epidemiologists study. Simple summary measures of exposure such as the average, cumulative exposure, or duration of exposure, can be applied suitably in exposure-response analyses in many instances. H...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2006.030031
更新日期:2007-07-01 00:00:00
abstract:OBJECTIVES:Examine trends and patterns of work-related musculoskeletal disorders (WMSDs) among construction workers in the USA, with an emphasis on older workers. METHODS:WMSDs were identified from the 1992-2014 Survey of Occupational Injuries and Illnesses (SOII), and employment was estimated from the Current Populat...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2016-103943
更新日期:2017-05-01 00:00:00
abstract:AIM:To determine the prevalence of chronic fatigue syndrome (CFS)-like caseness in the working population. METHODS:Using data from the prospective Maastricht Cohort Study on Fatigue at Work, the prevalence and incidence of CFS-like cases (employees meeting research criteria for CFS) were determined among 5499 employee...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2003.008912
更新日期:2004-05-01 00:00:00
abstract:OBJECTIVES:Meatpacking remains a hazardous and largely unexamined industry. Despite prevention efforts, laceration injuries, among others, remain high. We estimated the magnitude of associations between transient exposures such as equipment malfunction, performing an unusual work task, rushing, and occurrence of lacera...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2009.048611
更新日期:2010-10-01 00:00:00
abstract:OBJECTIVE:To find whether continuous ceramic filaments (CCFs) and silicon carbide whiskers (SiCWs), which are used in many industries as reinforcing materials in advanced ceramic composites, are carcinogenic in the intrapleural inoculation assay. METHODS:Samples of SiCWs, CCF, International Union Against Cancer crocid...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.53.12.813
更新日期:1996-12-01 00:00:00
abstract::Four workers chronically exposed to elemental mental mercury in a lampsocket manufacturing factory were studied. The clinical manifestations were severe in one, mild in another, and suspicious in the remaining two. Correlation between severity of clinical features and increased urinary mercury concentrations was found...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.51.4.267
更新日期:1994-04-01 00:00:00
abstract:OBJECTIVE:To explore the healthy worker survivor effect (HWSE) in a study of Vermont granite workers by distinguishing "prevalent" from "incident" hires based on date of hire before or after the start of follow-up. METHODS:Records of workers between 1950 and 1982 were obtained from a medical surveillance programme. Pr...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2006.031369
更新日期:2007-10-01 00:00:00
abstract:OBJECTIVES:To investigate the association between occupational exposure to disinfectants/antiseptics used for hand hygiene and asthma control in nurses. METHODS:In 2014, we invited female nurses with asthma drawn from the Nurses' Health Study II to complete two supplemental questionnaires on their occupation and asthm...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2017-104740
更新日期:2018-05-01 00:00:00