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Obesity and breast cancer

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https://www.readbyqxmd.com/read/27918854/randomized-trial-testing-the-effects-of-eating-frequency-on-two-hormonal-biomarkers-of-metabolism-and-energy-balance
#1
Martine M Perrigue, Adam Drewnowski, Ching-Yun Wang, Xiaoling Song, Mario Kratz, Marian L Neuhouser
BACKGROUND: Eating frequency (EF) may influence obesity-related disease risk by attenuating postprandial fluctuations in hormones involved in metabolism, appetite regulation, and inflammation. MATERIALS/METHODS: This randomized crossover intervention trial tested the effects of EF on fasting plasma insulin-like growth factor-I (IGF-1) and leptin. Fifteen subjects (4 males, 11 females) completed two eucaloric intervention phases lasting 21 days each: low EF ("low-EF"; 3 eating occasions/day) and high EF ("high-EF"; 8 eating occasions/day)...
December 5, 2016: Nutrition and Cancer
https://www.readbyqxmd.com/read/27910901/risk-factors-for-endometrial-cancer-results-from-a-hospital-based-case-control-study
#2
Maryam Ghanbari Andarieh, Mouloud Agajani Delavar, Dariush Moslemi, Sedighe Esmaeilzadeh
Objectives: The purpose of this investigation was to examine the association between endometrial cancer and possible etiological agents. Methods: A case-control study was conducted in Iran between March 2012 and May 2016. The demographic and reproductive factors of 205 women with endometrial cancer were compared, and 590 healthy cases were participated in the control group. For each endometrial cancer case, there were three controls, who were matched in terms of age and residence. The data were considered significant at p ≤0...
January 10, 2016: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/27909911/obesity-as-an-avoidable-cause-of-cancer-attributable-risks
#3
Andrew G Renehan, Isabelle Soerjomataram
Excess body weight, commonly categorised as overweight (body mass index, BMI 25.0-29.9 kg/m(2)) and obesity (BMI ≥30 kg/m(2)) is an established risk factor for increased incidence of several adult cancers. As body weight is modifiable, there is a potential for cancer prevention. Calculation of attributable risk (here expressed at population attributable fraction, PAF) offers an estimate of the burden of excess cancers attributable to elevated BMI in populations, and thus an approximation of avoidable cases and the opportunity for prevention...
2016: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/27909909/obesity-biomarkers-metabolism-and-risk-of-cancer-an-epidemiological-perspective
#4
Katharina Nimptsch, Tobias Pischon
Obesity is associated with metabolic alterations that may pose a biological link between body fatness and risk of cancer. Elucidating the role of obesity-related biomarkers in cancer development is essential for developing targeted strategies aiming at obesity-associated cancer prevention. Molecular epidemiological studies of the past decades have provided evidence that major hormonal pathways linking obesity and cancer risk include the insulin and insulin-like growth factor-1 (IGF-1) axis, sex-steroid hormones, adipokines and chronic low-grade inflammation...
2016: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/27909901/obesity-and-breast-cancer
#5
Renée T Fortner, Verena Katzke, Tilman Kühn, Rudolf Kaaks
The relationship between adiposity and breast cancer risk and prognosis is complex, with associations that differ depending on when body size is assessed (e.g., pre- vs. postmenopausal obesity) and when breast cancer is diagnosed (i.e., pre- vs. postmenopausal disease). Further, the impact of obesity on risk differs by tumor hormone receptor status (e.g., estrogen (ER) and progesterone (PR) receptor) and, among postmenopausal women, use of exogenous hormones (i.e., hormone replacement therapy (HRT)). In the context of these complexities, this review focuses on associations between childhood and adolescent adiposity, general adiposity, weight changes (i...
2016: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/27909899/obesity-and-risk-of-cancer-an-introductory-overview
#6
Tobias Pischon, Katharina Nimptsch
The prevalence of obesity has increased substantially in the past in almost all countries of the world, and a further increase is expected for the future. Besides the well-established effects on type 2 diabetes and cardiovascular disease, there is convincing evidence today that obesity also increases the risk of several types of cancer, including colorectal cancer, postmenopausal breast cancer, endometrial cancer, renal cell carcinoma, esophageal adenocarcinoma, pancreatic cancer, and liver cancer. Obesity probably also increases the risk of ovarian cancer, advanced prostate cancer, gallbladder cancer, and gastric cardia cancer...
2016: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/27908924/excess-weight-as-a-risk-factor-common-to-many-cancer-sites-words-of-caution-when-interpreting-meta-analytic-evidence
#7
Melina Arnold, Andrew G Renehan, Graham A Colditz
For over a decade, excess body weight, commonly categorized as overweight (body mass index, BMI: 25.0 to 29.9 kg/m2) and obesity (BMI: ≥ 30 kg/m2) has been an established incidence risk factor for several adult cancers (1). For 2012, the burden of disease attributed to elevated BMI was estimated as nearly half-million new cancers worldwide, making this the third highest ranked cancer risk factor globally after smoking and infections (ranked second in most western populations) and an important public health problem (2, 3)...
December 1, 2016: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/27903155/obesity-and-cancer-mechanisms-tumor-microenvironment-and-inflammation
#8
Neil M Iyengar, Ayca Gucalp, Andrew J Dannenberg, Clifford A Hudis
Purpose There is growing evidence that inflammation is a central and reversible mechanism through which obesity promotes cancer risk and progression. Methods We review recent findings regarding obesity-associated alterations in the microenvironment and the local and systemic mechanisms through which these changes support tumor growth. Results Locally, hyperadiposity is associated with altered adipose tissue function, adipocyte death, and chronic low-grade inflammation. Most individuals who are obese harbor inflamed adipose tissue, which resembles chronically injured tissue, with immune cell infiltration and remodeling...
December 10, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27903149/obesity-and-breast-cancer-prognosis-evidence-challenges-and-opportunities
#9
Sao Jiralerspong, Pamela J Goodwin
Purpose To summarize the evidence of an association between obesity and breast cancer prognosis. Methods We reviewed the literature regarding overweight and obesity and breast cancer survival outcomes, overall and with regard to breast cancer subtypes, breast cancer therapies, biologic mechanisms, and possible interventions. We summarize our findings and provide clinical management recommendations. Results Obesity is associated with a 35% to 40% increased risk of breast cancer recurrence and death and therefore poorer survival outcomes...
December 10, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27903147/weight-loss-randomized-intervention-trials-in-female-cancer-survivors
#10
Rowan T Chlebowski, Marina M Reeves
Purpose Observational study evidence has associated overweight/obesity with decreased survival in women with breast cancer and with several other cancers. Although full-scale, definitive weight loss adjuvant intervention trials with cancer end points remain to be conducted, a number of randomized controlled trials have evaluated weight loss interventions in survivors of cancer in women. Findings from these trials in breast, endometrial, and ovarian cancer are reviewed. Methods A systematic review of randomized controlled clinical trials evaluating weight loss interventions was updated (for studies published 2013 to 2016), and clinical trials registers were searched for ongoing trials...
December 10, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27895151/high-fat-diet-promotes-mammary-gland-myofibroblast-differentiation-through-mir-140-downregulation
#11
Benjamin Wolfson, Yongshu Zhang, Ramkishore Gernapudi, Nadire Duru, Yuan Yao, Pang-Kuo Lo, Qun Zhou
Human breast adipose tissue is a heterogonous cell population consisting of mature white adipocytes, multipotent mesenchymal stem cells, committed progenitor cells, fibroblasts, endothelial cells, and immune cells. Dependent on external stimulation, adipose derived stem cells differentiate along diverse lineages into adipocytes, chondrocytes, osteoblasts, fibroblasts, and myofibroblasts. It is currently not fully understood how high-fat diet reprograms adipose-derived stem cells into myofibroblasts. In our study, we use regular-diet and high-fat diet induced obesity mouse models to investigate the role of dietary fat on myofibroblast differentiation in the mammary stromal microenvironment...
November 28, 2016: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/27889687/role-of-inflammation-in-obesity-related-breast-cancer
#12
REVIEW
Elisa Crespi, Giulia Bottai, Libero Santarpia
Chronic inflammation associated with obesity is now recognized to be an important condition in promoting carcinogenesis and progression in breast cancer patients, mostly in postmenopausal women with tumors expressing estrogen and progesterone receptors. In obese patients, altered levels of several inflammatory mediators regulating aromatase and estrogen expression are one of the mechanisms responsible of increase breast cancer risk. Growing attention has also been paid to the local adipose inflammation and the role played by macrophages as determinants of breast cancer risk recurrence and prognosis...
November 24, 2016: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/27886642/obesity-and-the-breast-cancer-methylome
#13
REVIEW
William B Coleman
Breast cancer is associated with risk factors such as advancing age and obesity. However, the linkages between these risk factors for breast cancer development and initiation of the disease are not yet clear. Obesity may drive breast cancer development through increases in circulating estrogens in postmenopausal women. Mammary cell susceptibility to neoplastic transformation requires both genetic and epigenetic alterations, including changes in DNA methylation. Obesity is also subject to epigenetic regulation...
November 22, 2016: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/27886379/supernatants-of-adipocytes-from-obese-vs-normal-weight-women-and-breast-cancer-cells-in-vitro-impact-on-angiogenesis
#14
L Bougaret, L Delort, H Billard, C Lequeux, N Goncalves-Mendes, A Mojallal, O Damour, M-P Vasson, F Caldefie-Chezet
Breast cancer is correlated with a higher risk of metastasis in obese postmenopausal women. Adipokines, whose plasma concentrations are modulated in obese subjects, surrounds mammary cells, suggesting that adipocyte secretions affect mammary tumorogenesis. We hypothsesis that matures adipocytes secretions from obese women conditioned or not by breast neoplasic cells, increase changes on the stages of angiogenesis. Supernatants of human matures adipocytes differentiated from stem cells of either adipose tissue of normal weight (MA20) or obese (MA30) women or obtained from co-cultures between MA20 or MA30 and breast cancer cell line MCF-7 were collected...
November 25, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27882862/milk-and-dairy-products-good-or-bad-for-human-health-an-assessment-of-the-totality-of-scientific-evidence
#15
REVIEW
Tanja Kongerslev Thorning, Anne Raben, Tine Tholstrup, Sabita S Soedamah-Muthu, Ian Givens, Arne Astrup
BACKGROUND: There is scepticism about health effects of dairy products in the public, which is reflected in an increasing intake of plant-based drinks, for example, from soy, rice, almond, or oat. OBJECTIVE: This review aimed to assess the scientific evidence mainly from meta-analyses of observational studies and randomised controlled trials, on dairy intake and risk of obesity, type 2 diabetes, cardiovascular disease, osteoporosis, cancer, and all-cause mortality...
2016: Food & Nutrition Research
https://www.readbyqxmd.com/read/27877077/amelioration-of-estrogen-deficiency-induced-obesity-by-collagen-hydrolysate
#16
Tsay-I Chiang, I-Chang Chang, Hsueh-Hui Lee, Kuang Hui Hsieh, Yung-Wei Chiu, Te-Jen Lai, Jer-Yuh Liu, Li-Sung Hsu, Shao-Hsuan Kao
Objectives: Menopausal transition with declining estrogen levels significantly affects the physiological properties of women and consequently contributes to a series of medical conditions, including obesity. Obesity is a crucial risk factor associated with cardiovascular diseases, diabetes mellitus, and breast cancer. Increasing dietary protein content improves satiety and energy expenditure. Thus, we hypothesize that supplementing with collagen, a common dietary protein, may alleviate menopause-induced obesity...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27875786/inflammation-dysregulated-metabolism-and-aromatase-in-obesity-and-breast-cancer
#17
REVIEW
Heba Zahid, Evan R Simpson, Kristy A Brown
Obesity is associated with an increased risk of estrogen-dependent breast cancer after menopause. Adipose tissue undergoes important changes in obesity due to excess storage of lipids, leading to adipocyte cell death and the recruitment of macrophages. The resultant state of chronic low-grade inflammation is associated with the activation of NFkB signaling and elevated levels of aromatase, the rate-limiting enzyme in estrogen biosynthesis. This occurs not only in the visceral and subcutaneous fat, but also in the breast fat...
November 19, 2016: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/27868018/collagen-and-fibronectin-threads-linking-obesity-and-breast-cancer
#18
COMMENT
Lesley G Ellies
No abstract text is available yet for this article.
October 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27863969/moving-forward-with-obesity-research-in-breast-cancer
#19
EDITORIAL
Ana Elisa Lohmann, Pamela J Goodwin
No abstract text is available yet for this article.
November 15, 2016: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/27863058/the-living-well-after-breast-cancer%C3%A2-pilot-trial-a-weight-loss-intervention-for-women-following-treatment-for-breast-cancer
#20
Marina Reeves, Elisabeth Winkler, Nicole Mccarthy, Sheleigh Lawler, Caroline Terranova, Sandi Hayes, Monika Janda, Wendy Demark-Wahnefried, Elizabeth Eakin
AIM: Obesity is associated with poor prognosis and risk of treatment side-effects in breast cancer survivors. This pilot study assessed the feasibility, acceptability, safety and efficacy of a telephone-delivered weight loss intervention, among women (BMI 25-40 kg/m(2) ) following treatment for stage I-III breast cancer, on weight loss (primary outcome), quality of life and treatment-related side-effects (vs usual care). METHODS: Ninety women (mean ± SD age: 55...
November 10, 2016: Asia-Pacific Journal of Clinical Oncology
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