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Obesity and breast cancer

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https://www.readbyqxmd.com/read/28537928/differences-in-risk-factors-of-malignancy-between-men-and-women-with-type-2-diabetes-a-retrospective-case-control-study
#1
Mariusz Dąbrowski, Elektra Szymańska-Garbacz, Zofia Miszczyszyn, Tadeusz Dereziński, Leszek Czupryniak
BACKGROUND: The aim of this multicenter, retrospective, case-control study was to identify differences in risk factors of malignancy between men and women with type 2 diabetes. RESULTS: Among women the most prevalent malignancies were: breast and uterine cancers (35.6% and 14.4% respectively), while among men there were: colorectal and prostate cancers (24.5% and 13.3% respectively). In both gender metformin use was associated with lower cancer risk. Obesity and insulin treatment in dose-dependent and time-varying manner were associated with significantly increased risk of malignancy in females...
May 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28535646/-the-research-advances-in-the-relationship-between-visfatin-and-cancer
#2
W Y Tian, Y M Wang, Y F Zhang, F X Xue
Visfatin is a cytokine secreted by visceral adipose tissue, which plays an important role in obesity, diabetes, insulin resistance, atherosclerosis and polycystic ovarian syndrome. Additionally, visfatin is also involved in the metabolic syndrome-associated malignancies such as breast, colon, gastric and endometrial cancers. Visfatin inhibitor might be a potential antitumor therapeutic strategy for inhibiting the growth of many cancers.
May 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28528338/chronic-glibenclamide-treatment-attenuates-walker-256-tumour-growth-in-prediabetic-obese-rats
#3
Claudinéia Conationi da Silva Franco, Carina Previate, Kátia Gama de Barros Machado, Silvano Piovan, Rosiane Aparecida Miranda, Kelly Valério Prates, Veridiana Mota Moreira, Júlio Cezar de Oliveira, Luiz Felipe Barella, Rodrigo Mello Gomes, Flávio Andrade Francisco, Isabela Peixoto Martins, Audrei Pavanello, Tatiane Aparecida Ribeiro, Laize Peron Tófolo, Ananda Malta, Aline Amenencia de Souza, Vander Silva Alves, Sandra da Silva Silveira, Maria Raquel Marçal Natali, Jean Carlos Fernando Besson, Hely de Morais, Helenir Medri de Souza, Juliane Rocha de Sant Anna, Marialba Avezum Alves de Castro Prado, Paulo Cezar de Freitas Mathias
BACKGROUND/AIMS: The sulphonylurea glibenclamide (Gli) is widely used in the treatment of type 2 diabetes. In addition to its antidiabetic effects, low incidences of certain types of cancer have been observed in Gli-treated diabetic patients. However, the mechanisms underlying this observation remain unclear. The aim of the present work was to evaluate whether obese adult rats that were chronically treated with an antidiabetic drug, glibenclamide, exhibit resistance to rodent breast carcinoma growth...
May 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28526378/association-between-prepregnancy-obesity-and-metabolic-risk-in-chilean-premenopausal-women-10%C3%A2-y-postpartum
#4
Maria Luisa Garmendia, Carolina Zamudio, Marcela Araya, Juliana Kain
OBJECTIVES: One of every four pregnant women in Chile is obese. Gestational obesity is associated with maternal metabolic complications in pregnancy (e.g., gestational diabetes, preeclampsia), but to our knowledge, there is little evidence on relationships with future metabolic risk. The aim of this study was to evaluate the association between prepregnancy obesity (prepregnancy body mass index ≥30 kg/m(2)) or excessive gestational weight gain (GWG; according to the 2009 recommendations from the Institute of Medicine), and maternal metabolic complications 10 y postpartum in premenopausal Chilean women...
June 2017: Nutrition
https://www.readbyqxmd.com/read/28521190/simultaneous-determination-of-bisphenol-a-and-estrogens-in-hair-samples-by-liquid-chromatography-electrospray-tandem-mass-spectrometry
#5
Chaelin Lee, Chong Hyeak Kim, Sunghwan Kim, Sung-Hee Cho
Bisphenol A (BPA), an endocrine disrupter, is widely used to make chemicals for polycarbonate, plastics, beverage containers, epoxy resins, and cash register receipts. BPA is one of the known xenoestrogens, which have weak estrogenic activity and cause obesity, diabetes, breast cancer, and reproductive disorders. Even though the concentration level of metabolomes in hair is usually lower than that in urine and blood, there are several reasons why we chose to use hair samples. First, the sampling procedure of hairs is simple...
May 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28506814/the-relationship-between-type-2-diabetes-and-breast-cancer-incidence-in-differing-ethnic-groups
#6
REVIEW
Gertraud Maskarinec, Angelique Fontaine, Johanna Eyrun Torfadottir, Lorraine L Lipscombe, Iliana C Lega, Jonine Figueroa, Sarah Wild
In addition to rising type 2 diabetes and breast cancer incidence rates worldwide, diabetes may also increase breast cancer risk, and the association may vary by ethnicity. This review summarizes published data evaluating the association between diabetes and breast cancer in women of Asian, Hispanic and African American ancestry while considering a measure of obesity, body mass index (BMI). Published reports were identified through a search of PubMed and previous publications. Of 15 age-adjusted studies, 11 reported on Asian women from various countries, 3 on Hispanics and 1 on African Americans...
May 12, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/28502695/selective-activation-of-estrogen-receptor-%C3%AE-activation-function-1-is-sufficient-to-prevent-obesity-steatosis-and-insulin-resistance-in-mouse
#7
Maeva Guillaume, Sandra Handgraaf, Aurélie Fabre, Isabelle Raymond-Letron, Elodie Riant, Alexandra Montagner, Alexia Vinel, Melissa Buscato, Natalia Smirnova, Coralie Fontaine, Hervé Guillou, Jean-François Arnal, Pierre Gourdy
Estrogen receptor α (ERα) regulates gene transcription through two activation functions (ERα-AF1 and ERα-AF2). We recently found that the protection conferred by 17β-estradiol against obesity and insulin resistance requires ERα-AF2 but not ERα-AF1. However, the interplay between the two ERα-AFs is poorly understood in vivo and the metabolic influence of a specific ERα-AF1 action remains to be explored. To this end, wild-type, ERα-deficient, or ERα-AF1-deficient ovariectomized female mice were fed a high-fat diet and concomitantly administered with vehicle or tamoxifen, a selective ER modulator that acts as a ERα-AF1 agonist/ERα-AF2 antagonist...
June 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28494406/relative-dose-intensity-as-a-proxy-measure-of-quality-and-prognosis-in-adjuvant-chemotherapy-for-breast-cancer-in-daily-clinical-practice
#8
S J Schraa, K A Frerichs, M J Agterof, J C B Hunting, M Los, P C de Jong
AIM: Adjuvant chemotherapy treatment of women with breast cancer is frequently complicated by toxic side-effects, resulting in dose reduction and delay. In Dutch guidelines, a relative dose intensity (RDI) of at least 85% is recommended for optimal treatment. The aim was to investigate predictors of low RDI and its effect on prognosis. METHODS: All patients treated in the St. Antonius Hospital with adjuvant chemotherapy for breast cancer between 2008 and 2013 were included (N = 605)...
May 8, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28492548/inhibition-of-ptp1b-disrupts-cell-cell-adhesion-and-induces-anoikis-in-breast-epithelial-cells
#9
Bylgja Hilmarsdottir, Eirikur Briem, Skarphedinn Halldorsson, Jennifer Kricker, Sævar Ingthorsson, Sigrun Gustafsdottir, Gunhild M Mælandsmo, Magnus K Magnusson, Thorarinn Gudjonsson
Protein tyrosine phosphatase 1B (PTP1B) is a well-known inhibitor of insulin signaling pathways and inhibitors against PTP1B are being developed as promising drug candidates for treatment of obesity. PTP1B has also been linked to breast cancer both as a tumor suppressor and as an oncogene. Furthermore, PTP1B has been shown to be a regulator of cell adhesion and migration in normal and cancer cells. In this study, we analyzed the PTP1B expression in normal breast tissue, primary breast cells and the breast epithelial cell line D492...
May 11, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28481291/inflammation-downregulates-ucp1-expression-in-brown-adipocytes-potentially-via-sirt1-and-dbc1-interaction
#10
Mark K Nøhr, Natalia Bobba, Bjørn Richelsen, Sten Lund, Steen B Pedersen
Brown adipose tissue thermogenesis at the cost of energy is not only important for the development of obesity, but also possesses great promise in anti-obesity treatment. Uncoupling protein 1 (UCP1) expression has been reported to be under control of the intracellular deacetylase SIRT1. Here, we investigated the effect and mechanism of inflammation and sirtuin-1 (SIRT1) activation on the induction of thermogenic genes in immortalized brown adipocytes incubated with LPS or IL1β and mice with elevated inflammatory tone...
May 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28467614/autologous-breast-reconstruction-in-the-postbariatric-patient-population
#11
Andrew R Bauder, Fares Samra, Suhail K Kanchwala, Joseph M Serletti, Stephen J Kovach, Liza C Wu
BACKGROUND: Over 175,000 Americans underwent bariatric surgery in 2013 alone, resulting in rapid growth of the massive weight loss population. As obesity is a known risk factor for breast cancer, plastic surgeons are increasingly challenged to reconstruct the breasts of massive weight loss patients after oncologic resection. The goal of this study is to assess the outcomes of autologous breast reconstruction in postbariatric surgery patients at a single institution. METHODS: Patients who underwent autologous breast reconstruction between 2008 and 2014 were identified...
May 3, 2017: Microsurgery
https://www.readbyqxmd.com/read/28463728/binding-of-bisphenol-f-a-bisphenol-analogue-to-calf-thymus-dna-by-multi-spectroscopic-and-molecular-docking-studies
#12
Afia Usman, Masood Ahmad
BPF (Bisphenol-F), a member of the bisphenol family, having a wide range of industrial applications is gradually replacing Bisphenol-A. It is a recognized endocrine disrupting chemical (EDC). EDCs have been implicated in increased incidences of breast, prostate and testis cancers besides diabetes, obesity and decreased fertility. Due to the adverse effects of EDCs on human health, attempts have been directed towards their mechanism of toxicity especially at the molecular level. Hence, to understand the mechanism at the DNA level, interaction of BPF with calf thymus DNA was studied employing multi-spectroscopic, voltammetric and molecular docking techniques...
April 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28455439/cancer-incidence-attributable-to-excess-body-weight-in-alberta-in-2012
#13
Darren R Brenner, Abbey E Poirier, Anne Grundy, Farah Khandwala, Alison McFadden, Christine M Friedenreich
BACKGROUND: Excess body weight has been consistently associated with colorectal, breast, endometrial, esophageal, gall bladder, pancreatic and kidney cancers. The objective of this analysis was to estimate the proportion of total and site-specific cancers attributable to excess body weight in adults in Alberta in 2012. METHODS: We estimated the proportions of attributable cancers using population attributable risk. Risk estimates were obtained from recent meta-analyses, and exposure prevalence estimates were obtained from the Canadian Community Health Survey...
April 28, 2017: CMAJ Open
https://www.readbyqxmd.com/read/28446206/cooperation-of-neurotrophin-receptor-trkb-and-her2-in-breast-cancer-cells-facilitates-brain-metastases
#14
Cecilia Choy, Khairul I Ansari, Josh Neman, Sarah Hsu, Matthew J Duenas, Hubert Li, Nagarajan Vaidehi, Rahul Jandial
BACKGROUND: Patients with primary breast cancer that is positive for human epidermal growth factor receptor 2 (Her2+) have a high risk of developing metastases in the brain. Despite gains with systemic control of Her2+ disease using molecular therapies, brain metastases remain recalcitrant to therapeutic discovery. The clinical predilection of Her2+ breast cancer cells to colonize the brain likely relies on paracrine mechanisms. The neural niche poses unique selection pressures, and neoplastic cells that utilize the brain microenvironment may have a survival advantage...
April 26, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28446149/effect-of-genetic-variants-and-traits-related-to-glucose-metabolism-and-their-interaction-with-obesity-on-breast-and-colorectal-cancer-risk-among-postmenopausal-women
#15
Su Yon Jung, Eric M Sobel, Jeanette C Papp, Zuo-Feng Zhang
BACKGROUND: Impaired glucose metabolism-related genetic variants and traits likely interact with obesity and related lifestyle factors, influencing postmenopausal breast and colorectal cancer (CRC), but their interconnected pathways are not fully understood. By stratifying via obesity and lifestyles, we partitioned the total effect of glucose metabolism genetic variants on cancer risk into two putative mechanisms: 1) indirect (risk-associated glucose metabolism genetic variants mediated by glucose metabolism traits) and 2) direct (risk-associated glucose metabolism genetic variants through pathways other than glucose metabolism traits) effects...
April 26, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28442560/obesity-and-menopause-modify-the-epigenomic-profile-of-breast-cancer
#16
Ana B Crujeiras, Angel Díaz-Lagares, Olafur A Stefansson, Manuel Macias, Juan Sandoval, Juan Cueva, Rafael López-López, Sebastian Moran, Jon G Jonasson, Laufey Tryggvadottir, Elinborg Olafsdottir, Francisco J Tinahones, Marcos C Carreira, Felipe F Casanueva, Manel Esteller
Obesity is a high risk factor for breast cancer. This relationship could be marked by a specific methylome. The current work was aimed to explore the impact of obesity and menopausal status on variation in breast cancer methylomes. Data from Infinium 450K array-based methylomes of 64 breast tumor were coupled with information on BMI and menopausal status. Additionally, DNA methylation results were validated in 18 non-tumor and 81 tumor breast samples. Breast tumors arising in either pre- or postmenopausal women stratified by BMI or menopausal status alone were not associated with a specific DNA methylation pattern...
April 25, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28441380/comparison-of-general-obesity-and-measures-of-body-fat-distribution-in-older-adults-in-relation-to-cancer-risk-meta-analysis-of-individual-participant-data-of-seven-prospective-cohorts-in-europe
#17
Heinz Freisling, Melina Arnold, Isabelle Soerjomataram, Mark George O'Doherty, José Manuel Ordóñez-Mena, Christina Bamia, Ellen Kampman, Michael Leitzmann, Isabelle Romieu, Frank Kee, Konstantinos Tsilidis, Anne Tjønneland, Antonia Trichopoulou, Paolo Boffetta, Vassiliki Benetou, H B As Bueno-de-Mesquita, José María Huerta, Hermann Brenner, Tom Wilsgaard, Mazda Jenab
BACKGROUND: We evaluated the associations of anthropometric indicators of general obesity (body mass index, BMI), an established risk factor of various cancer, and body fat distribution (waist circumference, WC; hip circumference, HC; and waist-to-hip ratio, WHR), which may better reflect metabolic complications of obesity, with total obesity-related and site-specific (colorectal and postmenopausal breast) cancer incidence. METHODS: This is a meta-analysis of seven prospective cohort studies participating in the CHANCES consortium including 18 668 men and 24 751 women with a mean age of 62 and 63 years, respectively...
May 23, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28439492/leptin-signaling-and-cancer-chemoresistance-perspectives
#18
EDITORIAL
Pierre V Candelaria, Antonio Rampoldi, Adriana Harbuzariu, Ruben R Gonzalez-Perez
Obesity is a major health problem and currently is endemic around the world. Obesity is a risk factor for several different types of cancer, significantly promoting cancer incidence, progression, poor prognosis and resistance to anti-cancer therapies. The study of this resistance is critical as development of chemoresistance is a serious drawback for the successful and effective drug-based treatments of cancer. There is increasing evidence that augmented adiposity can impact on chemotherapeutic treatment of cancer and the development of resistance to these treatments, particularly through one of its signature mediators, the adipokine leptin...
April 10, 2017: World Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28435397/leptin-receptor-q223r-polymorphism-in-egyptian-female-patients-with-breast-cancer
#19
Mona Abo-Bakr El-Hussiny, Mohmed Ali Atwa, Waleed Elnahas Rashad, Dalia A Shaheen, Nora Marzouk Elkady
AIM OF THE STUDY: Breast cancer is the most common cause of death in women. Obesity has been associated with increased risk of breast cancer in post-menopausal women. It induces chronic inflammation, which increases local and systemic levels of cytokines and adipokines such as leptin. Leptin (LEP) and leptin receptor (LEPR) genes have several polymorphisms in humans. This study aims to assess the association between blood levels of leptin and LEPR Q223R gene polymorphism in patients of cancer breast...
2017: Contemporary Oncology Współczesna Onkologia
https://www.readbyqxmd.com/read/28416368/nutritional-management-in-women-with-polycystic-ovary-syndrome-a-review-study
#20
REVIEW
Zeinab Faghfoori, Siavash Fazelian, Mahdi Shadnoush, Reza Goodarzi
Polycystic ovary syndrome (PCOS) is endocrine disorder in women of reproductive age, which leads to reproductive, hormonal and metabolic abnormalities. Due to the presence of insulin resistance, PCOS increases the risk of chronic diseases like type 2 diabetes, hypertension, lipid disorders, cardiovascular diseases and malignancies such as breast and endometrial cancer. The actual cause of this syndrome is unknown but environmental factors such as dietary habits play an important role in prevention and treatment and lifestyle modifications are the most important therapeutic strategies in these patients...
April 5, 2017: Diabetes & Metabolic Syndrome
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