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  • 1
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objectives To assess whether age at menarche, age at menopause, parity, and selected blood hormones are associated with risk of hepatocellular carcinoma among women.Design Case–control.Sample and setting Data collected from 50 cases of hepatocellular carcinoma among women and 62 female controls with minor trauma or surgical conditions who attended one of three hospitals in Athens, Greece between 1995 and 1998.Methods Researchers collected information on Reproductive variables and assayed sera samples for blood hormone levels and for chronic infection with Hepatitis B and C viruses.Results Individuals with hepatocellular carcinoma had a lower mean age at menarche and a significantly higher mean age at menopause. After adjusting for potential confounding, age at menopause remained an important and significant predictor, increasing the risk of hepatocellular carcinoma 24% for each later year of menopause (P 〈 0.001). For each year that menarche was delayed, risk of hepatocellular carcinoma declined 21% (P= 0.100). Mean levels of insulin-like growth factor-1 and its binding protein were significantly reduced in cases compared with controls, while levels of oestradiol, testosterone and sex hormone binding globulin were somewhat higher among the cases.Conclusions This study provides indirect, but converging evidence that steroid hormones in general, and oestrogens in particular, play an important role in the aetiology of hepatocellular carcinoma among women.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-7225
    Keywords: breast cancer ; insulin growth factor I ; leptin ; postmenopause ; premenopause
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objectives: Because both breast cancer and the hormone leptin are associated with obesity and reproductive phenomena in women, we have examined whether there is a relationship between leptin and breast cancer among premenopausal and postmenopausal women. We have also evaluated in this dataset the association of IGF-I with breast cancer. Methods: Seventy-five cases, diagnosed during mammographic screening, with incident breast cancer were matched for age and type of permanent residence with seventy-five controls from those screened negative in the same study base. Results: There was no evidence for an association between IGF-I and either premenopausal or postmenopausal breast cancer risk or between leptin and postmenopausal breast cancer. Among premenopausal women, however, there was a strong and statistically significant inverse association of leptin with breast cancer. Conclusion: We did not confirm the positive association, reported from other investigations, of IGF-I with premenopausal breast cancer risk. We have found evidence, however, that leptin may be inversely related to breast cancer risk among premenopausal women. The latter finding is not biologically implausible and deserves to be examined in additional datasets.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-7225
    Keywords: birth weight ; childhood leukemia ; gender ; insulin-like growth factor ; IGF
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: Insulin-like growth factor-1 (IGF-1) and its principal binding protein-3 (IGFBP-3) are central in the mediation of the effect of growth hormone, and the IGF system has been reported to play a role in the pathogenesis of childhood leukemia. Methods: To further evaluate the hypothesis connecting the IGF system to this disease, we have examined whether IGF-1 and IGFBP-3 are associated with the two main endogenous risk factors for childhood leukemia, namely gender and birth weight, since boys and heavier newborns are known to be at higher risk. IGF-1 and IGFBP-3 were measured under code in the serum of 118 apparently healthy children aged 0–14years and the values of each of these components were regressed on age, gender and birth weight. Insulin-like growth factor-2 (IGF-2), as a dependent variable, and anemia during the corresponding pregnancy, as a predictor variable, were also evaluated for exploratory purposes. Results: In the total data set, IGF-1 was positively associated with birth weight (p = 0.0001), whereas girls had higher levels of IGFBP-3 (p = 0.01). Conclusions: It appears that the associations of measured components of the IGF system with the examined risk factors for childhood leukemia are largely compatible with those that would have been expected, if this system played a role in the pathogenesis of childhood leukemia.
    Type of Medium: Electronic Resource
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