| 31. |
- Erfurth, E M, et al.
(author)
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Serum levels of insulin-like growth factor I and insulin-like growth factor-binding protein 1 correlate with serum free testosterone and sex hormone binding globulin levels in healthy young and middle-aged men
- 1996
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In: Clinical Endocrinology. - : Wiley. - 0300-0664. ; 44:6, s. 64-659
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Journal article (peer-reviewed)abstract
- OBJECTIVE: Administration of testosterone has been reported to increase serum levels of IGF-I in men with isolated hypogonadotrophic hypogonadism. An inverse relation between serum IGF-I and sex hormone binding globulin (SHBG) is seen in GH deficient children. The biological action of IGF-I is thought to be influenced by binding proteins, one of which is insulin-like growth factor-binding protein-1 (IGFBP-1), which is not only a carrier protein but also actively regulates the cellular actions of IGF-I. These observations suggest associations between IGF-I, IGFBP-1, testosterone and SHBG in serum. The aim of the present study was to investigate these associations in normal healthy men.DESIGN AND PATIENTS: The associations between the serum levels of IGF-I and IGFBP-1 on one hand, and testosterone and SHBG on the other were investigated in 38 normal healthy young and middle-aged men.RESULTS: Serum levels of IGF-I decreased both with increasing age (r = -0.66, P < 0.001) and increasing SHBG levels (r = -0.46, P = 0.002), but increased with increasing free testosterone (f-testosterone) (r = 0.42, P = 0.005). These associations remained after mutual simultaneous adjustments in a multiple regression analysis. IGFBP-1 did not display any significant univariate correlation with age (r = -0.25, P = 0.06) or SHBG (r = 0.18, P = 0.14), but showed a significant positive correlation with both f-testosterone (r = 0.42, P = 0.004), and total testosterone (t-testosterone) (r = 0.39, P = 0.008). In a multiple regression analysis IGFBP-1 was positively correlated with both SHBG and f-testosterone, but not with t-testosterone.CONCLUSION: The present study suggests that among healthy young and middle-aged men, there is an association between serum levels of free-testosterone and SHBG on the one hand, and serum IGF-I and IGFBP-1 on the other.
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| 32. |
- Eriksson, NE, et al.
(author)
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Cancer incidence in 13811 patients skin tested for allergy
- 2005
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In: Journal of Investigational Allergology & Clinical Immunology. - 1698-0808. ; 15:3, s. 161-166
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Journal article (peer-reviewed)abstract
- Aim. Several studies have shown a negative correlation between cancer and atopy-related diseases. There are also a few reports of a positive relationship. We wanted to further evaluate these relationships in a prospective study. Subjects and methods. The incidence of malignant diseases among adult patients with atopy-related diseases (asthma, rhinitis, urticaria, eczema etc; n=13811), who had been skin prick tested in 1976-1999 was compared with the incidence in the general population. Expected cancer incidence from the date of skin prick testing up to 1999 was obtained from cause-, sex-, calendar-year-, and 5-year-age-group specific incidence rates for the county. These rates were calculated from cancer incidence and population counts obtained from the Swedish Cancer Register. The 95% confidence intervals (CIs) for cause-specific standardized incidence ratios (SIRS) were calculated. Skin prick tests were performed with Dermatophagoides pteronyssinus, horse, dog, cat, timothy, mugwort, birch, and Cladosporium. Patients having one or several positive skin prick test reactions (>= 2+) were regarded as atopics. Results. 119 cases of cancer occurred among 6224 atopic individuals (SIR 1.0) compared with 216 cases (SIR 0.94, CI 0.82-1.08) among 6358 non-atopics. There was a slight excess of Hodgkin's lymphoma cases among atopic men (SIR 4.03, 95% CI 1-10.3), and of non Hodgkin lymphoma cases among atopic women (SIR 4.52, 95% CI 1.23-11.6). However, a large number of comparisons were made which can have caused random findings. Conclusions. The results showed no associations between atopy or allergic symptoms, and subsequent cancer risk, but supported the theory that type-I allergy is not related to cancer risk.
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| 33. |
- Grimvall, E, et al.
(author)
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Monitoring of polychlorinated biphenyls in human blood plasma: methodological developments and influence of age, lactation, and fish consumption
- 1997
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In: Archives of Environmental Contamination and Toxicology. - : Springer Science and Business Media LLC. - 0090-4341 .- 1432-0703. ; 32:3, s. 329-336
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Journal article (peer-reviewed)abstract
- Human plasma samples from 50 wives of fishermen have been analyzed with respect to PCBs. The non-ortho-substituted PCB congeners CB-126 and CB-169 were determined by mass spectrometry in negative ion chemical ionization mode, which demonstrated a limit of detection of 30 fg. The recoveries of the internal standards used for determination of ortho-substituted CBs were approximately 95%. Two methods, one gravimetric and the other based on enzymatic determinations of triglycerides, cholesterol and phospholipids, were compared for the determination of total amount of lipids in the plasma samples; the correlation coefficient was 0.82 and the slope 0.98. For practical reasons, enzymatic determinations are recommended for further use. The total, lipid-adjusted concentrations of PCBs in plasma were influenced by age, total lactation time and consumption of fatty fish from the Baltic Sea.
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| 34. |
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| 35. |
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| 36. |
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| 37. |
- Hagmar, L., et al.
(author)
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Intra-individual variations and time trends 1991-2001 in human serum levels of PCB, DDE and hexachlorobenzene
- 2006
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In: Chemosphere. - : Elsevier BV. - 0045-6535 .- 1879-1298. ; 64:9, s. 1507-1513
-
Journal article (peer-reviewed)abstract
- Background: An important question is whether human serum levels of persistent organic pollutants has continued to decrease during the last decades. The aim of this study was to assess intra-individual variations over time of serum levels of 2,2',4,4',5,5'-hexachlorobiphenyl (CB-153), 1,1-dichloro-2,2-bis(4-chlorophenyl)-ethene (p,p'-DDE) and hexachlorobenzene (HCB), considering the impact of a number of possible determinants. Methods: Blood samples were drawn for the same 39 subjects in 1991 and 2001. Interviews were made at both occasions. Lipid adjusted serum concentrations of CB-153, p,p'-DDE and HCB were determined in both sets of blood samples using gas chromatography-mass spectrometry. The fatty acid composition of the serum lipids was analyzed by means of gas-liquid chromatography. Result: The CB-153 concentrations in serum had averagely decreased with 34% in between 1991 and 2001 (p < 0.001). Of individual determinants only increasing BMI was associated with decreasing CB-153 levels (beta = -1.0, 95% CI -1.8, -0.2, p = 0.01), explaining 13% of the variation. The average decrease of p,p'-DDE was 55%, and could only weakly be associated with a relative increase of BMI (beta = - 1.0, 95% CI-2.3, 0.2, p=0.09), explaining only 5% of the variation. The average decrease of HCB was 53%, and was associated only with high fish consumption in 1991, explaining 12% of the variation. Conclusions: The results support a continuing decrease in human body burdens of PCBs, DDE and HCB during the 1990s. The explanatory factors relative change of BMI and fish consumption explained only a minor part of the time-related variations in serum levels.
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| 38. |
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| 39. |
- Jakobsson, Kristina, et al.
(author)
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Airway symptoms and lung function in pipelayers exposed to thermal degradation products from MDI-based polyurethane.
- 1997
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In: Occupational and Environmental Medicine. - 1470-7926. ; 54, s. 873-879
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Journal article (peer-reviewed)abstract
- OBJECTIVES: To study the prevalence of symptoms from the eyes and the upper and lower respiratory tract, lung function, and immunological sensitisation towards isocyanates in pipelayers exposed to thermal degradation products from methylene diphenyl diisocyanate (MDI)-based polyurethane (PUR). MATERIAL AND METHODS: 50 presently active and 113 formerly active pipelayers were examined. Also, 65 unexposed workers were investigated for comparison. The one year prevalence of symptoms and smoking history (questionnaire data), lung function (vital capacity (VC) and forced expiratory volume in one second (FEV1), and atopy (positive skin prick tests towards standard allergens) were assessed among pipelayers and controls. For the pipelayers, the presence of work related symptoms and estimates of isocyanate and welding exposure were obtained from an interview. Skin prick tests towards specific isocyanate antigens and determinations of IgE-MDI and IgG-MDI in serum were also performed. RESULTS: The
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| 40. |
- Jakobsson, Kristina, et al.
(author)
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Asbestos, cement, and cancer in the right part of the colon
- 1994
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In: Occupational and Environmental Medicine. - 1470-7926. ; 51:2, s. 95-101
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Journal article (peer-reviewed)abstract
- OBJECTIVE--The aim was to investigate associations between exposure to mineral fibres and dust, and cancer in subsites within the large bowel. DESIGN--Pooled retrospective cohort studies. SUBJECTS AND SETTINGS--Blue collar workers, employed for at least one year in different trades; asbestos cement or cement workers (n = 2507), other industrial workers (n = 3965), and fishermen (n = 8092). MAIN OUTCOME MEASURES--Standardised incidence ratios (SIRs, national reference rates) were calculated for cause specific cancer morbidity between 1958 and 1989. The observation period began 15 years after first employment. RESULTS--The asbestos cement and cement workers had a slightly increased risk of colorectal cancer (SIR 1.5; 95% confidence interval (95% CI) 1.1-2.0). This was due to an increase only in the right part of the colon (SIR 2.5; 95% CI 1.6-3.8). The ratio of right (7th revision of the International Classification of Diseases ICD-7) 1530-1531)/left (ICD-7 1532-1533) colon cancer among the asbestos cement and cement workers of 4.8 differed significantly from the ratio both among the other blue collar workers (0.4) and among the fishermen (1.5). As the sensitivity and accuracy was insufficient, mortality data did not show the excess of cancers in the right part of the colon. CONCLUSIONS--An increased incidence of cancer in the right part of the colon was evident in the asbestos cement and cement workers. The distribution of cancers within the colon was noticeably different from that in other blue collar workers, indicating that our findings cannot be explained by socioeconomic confounding factors. A detailed and appropriate disease classification, based on incidence data, is necessary in order not to obscure or underestimate effects of exposure in epidemiological studies on colorectal cancer.
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