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- Friberg, Emilie, et al.
(författare)
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Coffee drinking and risk of endometrial cancer-A population-based cohort study
- 2009
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Ingår i: International Journal of Cancer. - : WILEY. - 0020-7136 .- 1097-0215. ; 125:10, s. 2413-2417
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Tidskriftsartikel (refereegranskat)abstract
- Coffee drinking has been reported to have beneficial effects on insulin resistance, which has been directly associated with endometrial cancer. Although I relationship between coffee consumption and endometrial cancer risk is biologically plausible, this hypothesis has been previously explored in only 2 prospective studies, with a small number of cases. We used data from the Swedish Mammography Cohort, a population-based prospective cohort study of 60,634 women. During 17.6 years of follow-up 677 participants were diagnosed with incident endometrial cancer (adenocarcinoma). We examined the association between self-reported coffee consumption (at baseline 1987-90 and in 1997) and endometrial cancer risk using Cox proportional hazards models. Each additional cut) (200 g) of coffee per day was associated with 11 rate ratio (RR) of 0.90 [95% confidence interval (CI), 0.83-0.97]. In women drinking 4 or more cups of coffee a day, file RR For the risk reduction of endometrial cancer was 0.75 (95% CL 0.58-0.97) when compared with those who drank I cup or less. The association seemed largely confined to overweight and obese women, who showed a respective risk reduction of 12% (95% Cl, 0-23%) and 20% (95% CI, 7-31%) for every cup or coffee. but was not observed among normal-weight women. There,vas I statistically significant interaction between coffee consumption and body mass index (p(interaction) < 0.001). These data indicate that coffee consumption may be associated with decreased risk of endometrial cancer. especially among women with excessive body weight. If confirmed by other prospective studies. these results are of major public health significance. (C) 2009 UICC
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| 2. |
- Friberg, Emilie, et al.
(författare)
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Diabetes and risk of endometrial cancer : A population-based prospective cohort study
- 2007
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Ingår i: Cancer Epidemiology, Biomarkers and Prevention. - Karolinska Inst, Div Nutr Epidemiol, Natl Inst Environm Med, SE-17177 Stockholm, Sweden. Harvard Univ, Beth Israel Deaconess Med Ctr, Sch Med, Div Endocrinol Diabet & Metab,Dept Med, Boston, MA 02215 USA. : AMER ASSOC CANCER RESEARCH. - 1055-9965 .- 1538-7755. ; 16:2, s. 276-280
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Tidskriftsartikel (refereegranskat)abstract
- Although there is accumulating evidence that hyperinsulinemia in the context of insulin resistance is associated with carcinogenesis, only one prospective study of endometrial cancer incidence, in relation to diabetes, addressed this issue and showed no significant positive association. No previous study has investigated whether physical activity can modify the association between diabetes and endometrial cancer. We examined the association between diabetes and incidence of endometrial cancer and the potential effect modification by obesity and physical activity in the Swedish Mammography Cohort, a prospective cohort of 36,773 women, including 225 incident endometrial adenocarcinoma cases. After adjustments, the relative risk (RR) for endometrial cancer among women with diabetes comparing with nondiabetic women was 1.94 [95% confidence interval (95% CI), 1.23-3.08]. Among obese diabetics, the RR was 6.39 (95% CI, 3.28-12.06) compared with nonobese nondiabetic women. Among diabetics with low physical activity, the RR for endometrial cancer was 2.80 (95% CI, 1.62-4.85) compared with physically active nondiabetic women. Obese diabetics with low physical activity had a RR of 9.61 (95% CI, 4.66-19.83) compared with normal weight nondiabetic women with high physical activity. Diabetes was associated with a 2-fold increased risk, and combination of diabetes with obesity and low physical activity was associated with a further increased risk for endometrial cancer. Interventions to reduce body weight and increase physical activity may have important implications in terms of prevention of endometrial cancer and future management of diabetic subjects.
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| 3. |
- Friberg, Emilie, et al.
(författare)
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Physical activity and risk of endometrial cancer : A population-based prospective cohort study
- 2006
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Ingår i: Cancer Epidemiology, Biomarkers and Prevention. - Karolinska Inst, Div Nutr Epidemiol, Natl Inst Environm Med, SE-17177 Stockholm, Sweden. Harvard Univ, Sch Med, Div Endocrinol Diabet & Metab, Dept Med,Beth Israel Deaconess Med Ctr, Boston, MA 02115 USA. : AMER ASSOC CANCER RESEARCH. - 1055-9965 .- 1538-7755. ; 15:11, s. 2136-2140
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Tidskriftsartikel (refereegranskat)abstract
- Physical activity is involved in the regulation of metabolic and hormonal pathways and is one of the factors important for the maintenance of body weight; obesity is a risk factor for endometrial cancer. A connection between physical activity and endometrial cancer risk through hormonal mechanisms, possibly mediated by body weight, is biologically plausible. Only one study has investigated total physical activity, and no previous study has examined leisure time inactivity directly. We investigated the association of total physical activity and different types of physical activity with risk of endometrial cancer in the Swedish Mammography Cohort, a population-based prospective cohort, including 33,723 women and 199 endometrial cancer cases. After adjustments for potential confounders (age, body mass index, parity, history of diabetes, total fruit and vegetable intake, and education), the relative risks for endometrial cancer for the second to fourth quartile of total physical activity compared with the lowest one were 0.80 [95% confidence interval (95% CI), 0.54-1.18], 0.87 (95% CI, 0.59-1.28), and 0.79 (95% CI, 0.53-1.17). High leisure time inactivity (watching TV/sitting >= 5 hours daily) compared with low was associated with increased risk of endometrial cancer (relative risk, 1.66; 95% CI, 1.05-2.61). The associations were not modified by body mass index. Findings from this study suggest that total physical activity is weakly inversely associated with endometrial cancer risk and that leisure time inactivity is statistically significantly associated with increased risk for endometrial cancer.
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| 4. |
- Petridou, Eleni, et al.
(författare)
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Neonatal leptin levels are strongly associated with female gender, birth length, IGF-I levels and formula feeding.
- 2005
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Ingår i: Clinical Endocrinology. - : Wiley. - 0300-0664 .- 1365-2265. ; 62:3, s. 366-71
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To investigate predictors of circulating leptin in healthy full-term newborns and to explore the relationship with anthropometric variables, serum levels of adiponectin and the major components of the IGF system at birth. To explore whether leptin levels are regulated by breastfeeding vs. formula feeding.DESIGN: Observational cross-sectional study.PATIENTS: Three hundred and nineteen healthy full-term newborns delivered during 1999 in Athens, Greece.MEASUREMENTS: Anthropometric measurements, formula feeding information and blood samples were obtained. Leptin and adiponectin determinations were performed using a radioimmunoassay (RIA).RESULTS: Multivariate regression analyses showed that leptin levels were positively associated with female gender, newborn length, ponderal index and IGF-I levels, but not with adiponectin levels. Newborns who were fed exclusively with milk formulas had more than twice the leptin levels of those who were exclusively breastfed.CONCLUSIONS: Leptin levels are positively related to female gender and anthropometric characteristics of neonates but, contrary to studies in adults, are not correlated with adiponectin levels. We also found evidence that formula feeding imparts a considerable increase in leptin levels in newborns.
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| 5. |
- Petridou, Eleni T., et al.
(författare)
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Circulating adiponectin levels and expression of adiponectin receptors in relation to lung cancer : two case-control studies
- 2007
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Ingår i: Oncology. - : S. Karger AG. - 0030-2414 .- 1423-0232. ; 73:3-4, s. 261-269
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Decreased circulating levels of adiponectin, an adipocyte-secreted hormone and endogenous insulin sensitizer, have been associated with several obesity-related malignancies. Thiazolidinedione administration, which increases adiponectin levels, decreases risk for lung cancer. Whether circulating adiponectin levels are associated with lung cancer and/or whether adiponectin receptors are expressed in lung cancer remains unknown. METHODS: We conducted a case-control study of 85 patients with incidental, histologically confirmed lung cancer and 170 healthy controls matched by gender and age. In a separate study, archival lung specimens from 134 cancerous and 8 noncancerous tissues were examined for relative expression of adiponectin receptors AdipoR1 and AdipoR2 using immunohistochemistry. RESULTS: Tobacco smoking, heavy alcohol intake and education were all associated with lung cancer risk, whereas serum adiponectin levels were not significantly different between cases and controls (multiple logistic regression, odds ratio per SD of adiponectin among controls: 1.13, 95% confidence interval: 0.64-2.02). Adiponectin levels were significantly lower (odds ratio: 0.25, 95% confidence interval: 0.10-0.78) among patients with advanced compared to those with limited disease stage. Expression of adiponectin receptors was apparent only in the cancerous lung tissue (64.2% AdipoR1 and 61.9% AdipoR2 in cancerous vs. 0% among noncancerous tissue). Specifically, AdipoR1 was expressed in all disease types, but no difference was noted with disease stage, whereas AdipoR2 was mainly expressed in the non-small cell carcinomas and more prominently in the advanced disease stage (80%). CONCLUSIONS: Circulating adiponectin levels are not different in cases of this malignancy - which seems to be unrelated to obesity and insulin resistance - compared to their healthy controls, though hormonal levels were significantly lower in advanced versus limited lung cancer. Both adiponectin receptors were expressed in cancerous lung tissue, but not in normal control tissue and there was a differential expression by disease stage. These findings should be further explored, especially in the context of the recently reported protective effect of thiazolidinediones in diabetic patients with lung cancer.
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| 6. |
- Spyridopoulos, Themistoklis N., et al.
(författare)
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Low adiponectin levels are associated with renal cell carcinoma : A case-control study
- 2007
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Ingår i: International Journal of Cancer. - : Wiley. - 0020-7136 .- 1097-0215. ; 120:7, s. 1573-1578
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Tidskriftsartikel (refereegranskat)abstract
- Adiponectin is a novel endogenous insulin sensitizer, secreted by mature adipocytes. Circulating levels of adiponectin are inversely associated with obesity and insulin resistance. Because obesity is a risk factor for renal cell carcinoma (RCC), we hypothesized that low adiponectin levels are associated with RCC. To evaluate this hypothesis, we conducted a case- control study of 70 patients with histologically confirmed RCC and 280 healthy controls matched by gender, age and county of residence. Study subjects were interviewed and blood samples were collected during a 32-month period in Athens, Greece. Serum adiponectin levels were statistically, significantly and inversely associated with RCC when compared with controls (OR = 0.76, p = 0.05) and this association remained practically unchanged after controlling for BMI; the introduction of waist to hip ratio along with adiponectin in the multiple logistic regression analysis model rendered the association between adiponectin and RCC risk insignificant, indicating that altered levels of adiponectin may mediate the effect of central or intra-abdominal obesity on RCC. Prospective studies as well as studies exploring underlying mechanisms are needed to fully explore the role of adiponectin in predicting future risk of RCC in humans.
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