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Adipocyte and breast cancer

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https://www.readbyqxmd.com/read/29042292/obesity-enhances-carcinogen-7-12-dimethylbenz-a-anthracene-induced-tumorigenesis-in-vitro-and-in-vivo
#1
Chia-Chien Hsieh, Shih-Han Peng, Mei-Jia Chou
Growing body of evidence shows that extra adiposity influences on the progression of multiple cancers, including breast cancer. The aim of this study is to investigate whether obesity correlates with mammary tumor development in vitro and in vivo. We found that obesity-related mediators, 3T3-L1 adipocyte conditioned medium, enhanced formation of cancerous foci induced by the carcinogen 7,12-Dimethylbenz[a]anthracene (DMBA) in NIH/3T3 fibroblasts, in vitro. Additionally, we tested the effect of obesity in mouse model of DMBA-induced breast cancer...
October 14, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29031720/brown-adipocytes-can-display-a-mammary-basal-myoepithelial-cell-phenotype-in%C3%A2-vivo
#2
Li Li, Baoguo Li, Min Li, Chaoqun Niu, Guanlin Wang, Ting Li, Elżbieta Król, Wanzhu Jin, John R Speakman
OBJECTIVE: Previous work has suggested that white adipocytes may also show a mammary luminal secretory cell phenotype during lactation. The capacity of brown and beige/brite adipocytes to display a mammary cell phenotype and the levels at which they demonstrate such phenotypes in vivo is currently unknown. METHODS: To investigate the putative adipocyte origin of mammary gland cells, we performed genetic lineage-labeling experiments in BAT and the mammary glands...
October 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28993797/the-linkage-between-breast-cancer-hypoxia-and-adipose-tissue
#3
REVIEW
Linda K Rausch, Nikolaus C Netzer, Josef Hoegel, Stephan Pramsohler
OBJECTIVE: The development of breast cancer cells is linked to hypoxia. The hypoxia-induced factor HIF-1α influences metastasis through neovascularization. Hypoxia seems to decrease the responsiveness to hormonal treatment due to loss of estrogen receptors (ERs). Obesity is discussed to increase hypoxia in adipocytes, which promotes a favorable environment for tumor cells in mammary fat tissue, whereas, tumor cells profit from good oxygen supply and are influenced by its deprivation as target regions within tumors show...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28989976/hematopoietic-stem-cell-derived-adipocytes-promote-tumor-growth-and-cancer-cell-migration
#4
Y Xiong, D L Russell, L T McDonald, L A Cowart, A C LaRue
Adipocytes, apart from their critical role as the energy storage depots, contribute to the composition of the tumor microenvironment. Our previous studies based on a single hematopoietic stem cell (HSC) transplantation model, have revealed a novel source of adipocytes from HSCs via monocyte/macrophage progenitors. Herein, we extend these studies to examine the role of HSC-derived adipocytes (HSC-Ad) in tumor progression. When cultured under adipogenic conditions, bone marrow-derived monocytic progenitors differentiated into adipocytes that accumulated oil droplets containing triglyceride...
2017: International Journal of Cancer Research and Molecular Mechanisms
https://www.readbyqxmd.com/read/28919302/obesity-and-breast-cancer-role-of-estrogens-and-the-molecular-underpinnings-of-aromatase-regulation-in-breast-adipose-tissue
#5
REVIEW
Céline Gérard, Kristy A Brown
One in eight women will develop breast cancer over their lifetime making it the most common female cancer. The cause of breast cancer is multifactorial and includes hormonal, genetic and environmental cues. Obesity is now an accepted risk factor for breast cancer in postmenopausal women, particularly for the hormone-dependent subtype of breast cancer. Obesity, which is characterized by an excess accumulation of body fat, is at the origin of chronic inflammation of white adipose tissue and is associated with dramatic changes in the biology of adipocytes leading to their dysfunction...
September 15, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28877394/her2-breast-cancer-cells-undergo-apoptosis-upon-exposure-to-tannic-acid-released-from-remodeled-crosslinked-collagen-type-i
#6
Lauren G Jordan, Brian W Booth
Tannic acid (TA) is a naturally occurring polyphenol that crosslinks collagen type I and possesses anti-cancer potential. In previous studies, we demonstrated the increased sensitivity of estrogen receptor-positive (ER(+) ) breast cancer cells to TA as opposed to triple negative breast cancer cells and normal human breast epithelial cells. In the current study, human pre-adipocytes and HER2+ breast cancer cells were grown on TA-crosslinked collagen type I beads. Cell attachment, growth, and proliferation of the cells result in remodeling of the collagen matrix and release of the crosslinking TA...
September 6, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28873415/proliferative-endocrine-effects-of-adipose-tissue-from-obese-animals-on-mcf7-cells-are-ameliorated-by-resveratrol-supplementation
#7
Christopher F Theriau, O'Llenecia S Sauvé, Marie-Soleil Beaudoin, David C Wright, Michael K Connor
Obesity is clearly associated with an increased risk of breast cancer in postmenopausal women. The purpose was to determine if obesity alters the adipocyte adipokine secretion profile, thereby altering the adipose-dependent paracrine/endocrine growth microenvironment surrounding breast cancer cells (MCF7). Additionally, we determined whether resveratrol (RSV) supplementation can counteract any obesity-dependent effects on breast cancer tumor growth microenvironment. Obese ZDF rats received standard chow diet or diet supplemented with 200 mg/kg body weight RSV...
2017: PloS One
https://www.readbyqxmd.com/read/28864539/signals-from-the-adipose-microenvironment-and-the-obesity-cancer-link-a-systematic-review
#8
REVIEW
Caroline Himbert, Mahmoud Delphan, Dominique Scherer, Laura W Bowers, Stephen Hursting, Cornelia M Ulrich
Obesity and its associated metabolic dysregulation are established risk factors for many cancers. However, the biologic mechanisms underlying this relationship remain incompletely understood. Given the rising rates of both obesity and cancer worldwide, and the challenges for many people to lose excess adipose tissue, a systematic approach to identify potential molecular and metabolic targets is needed to develop effective mechanism-based strategies for the prevention and control of obesity-driven cancer. Epidemiologic, clinical, and preclinical data suggest that within the growth-promoting, proinflammatory microenvironment accompanying obesity, crosstalk between adipose tissue (comprised of adipocytes, macrophages and other cells) and cancer-prone cells may occur via obesity-associated hormones, cytokines, and other mediators that have been linked to increased cancer risk and/or progression...
September 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/28841614/autologous-fat-grafting-as-a-novel-antiestrogen-vehicle-for-the-treatment-of-breast-cancer
#9
Scott Thomas, Stephanie Chen, Hani Sbitany, Edwin Kwon, Merisa Piper, Jeenah Park, Manuela Terranova Barberio, Nela Pawlowska, Pamela N Munster
BACKGROUND: Adipose fat transfer is increasingly used for contour corrections of the tumor bed after lumpectomy and breast reconstructions after mastectomy. The lipophilic nature of the fat tissue may render adipocytes an ideal vehicle with which to deliver a high boost of an antiestrogen to the tumor bed to serve as an adjunct systemic hormonal therapy. The authors therefore tested whether adipocytes could safely be loaded with an antiestrogen and allow for release at therapeutic concentrations to treat breast cancer...
September 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28835077/-effect-of-mesenchymal-stem-cells-on-the-apoptosis-of-breast-cancer-cells-induced-by-cisplatin
#10
H T Xu, Y Zhou, W Li, H H Zhang, H Y Wu, J Yang
Objective: To investigate the effect of mesenchymal stem cells (MSCs) on apoptosis of breast cancer cell line MCF-7 induced by cisplatin (DDP), MSCs derived from breast cancer (BC-MSCs) or adjacent non-cancerous tissues (BN-MSCs) were isolated, cultured and identified. Methods: BC-MSCs and BN-MSCs were isolated and cultured by tissue adherent method. The differentiation potential of BC-MSCs was detected by osteogenic and adipogenic induction, and cell surface markers of BC-MSCs and BN-MSCs were evaluated by flow cytometry...
August 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28779906/-reverse-expansion-a-new-technique-of-breast-reconstruction-with-autologous-tissue
#11
L Fabiocchi, G Semprini, F Cattin, L Dellachiesa, T Fogacci, G Frisoni, D Samorani
The treatment for breast cancer is sometimes long and requires a multidisciplinary approach. In 2010, in our centre, we began to perform fat grafting for breast reconstruction using the so-called 'reverse expansion' technique. This consists of the insertion of a skin expander during mastectomy, in its expansion and then in its gradual deflation in the surgical theatre during fat grafting. We performed a complete breast reconstruction in 57 patients by reverse expansion. We harvested fat from the fat excess areas using a normal liposuction cannula...
July 18, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28769000/a-novel-bongkrekic-acid-analog-mediated-modulation-of-the-size-of-lipid-droplets-evidence-for-the-appearance-of-smaller-adipocytes
#12
Hiroyuki Okazaki, Shuso Takeda, Hiroyuki Ishii, Yukimi Takemoto, Satoshi Fujita, Masaki Suyama, Kenji Matsumoto, Mitsuru Shindo, Hironori Aramaki
Thiazolidinediones (TZDs) are known as peroxisome proliferator-activated receptor γ (PPARγ) activators, and are used in the treatment of diabetes. Although the usefulness of TZDs has been demonstrated, some of their side effects are becoming an obstacle to their clinical applicability; edema is known to be evoked by the "structural characteristics" of TZD, but not by the PPARγ activation. Thus, novel therapeutic modalities (i.e., non-TZD-type PPARγ activators) having different structures to those of TZDs are desired...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28759385/physical-activity-sedentary-behaviour-diet-and-cancer-an-update-and-emerging-new-evidence
#13
REVIEW
Jacqueline Kerr, Cheryl Anderson, Scott M Lippman
The lifestyle factors of physical activity, sedentary behaviour, and diet are increasingly being studied for their associations with cancer. Physical activity is inversely associated with and sedentary behaviour is positively (and independently) associated with an increased risk of more than ten types of cancer, including colorectal cancer (and advanced adenomas), endometrial cancers, and breast cancer. The most consistent dietary risk factor for premalignant and invasive breast cancer is alcohol, whether consumed during early or late adult life, even at low levels...
August 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28701570/adipose-derived-fatty-acid-binding-proteins-plasma-concentrations-are-increased-in-breast-cancer-patients
#14
Sandra Guaita-Esteruelas, Paula Saavedra-García, Alba Bosquet, Joan Borràs, Josefa Girona, Kepa Amiliano, Marta Rodríguez-Balada, Mercedes Heras, Luís Masana, Josep Gumà
BACKGROUND: Adipose tissue is an endocrine organ that could play a role in tumor progression via its secreted adipokines. The role of adipose-derived fatty acid-binding protein (FABP) 4 and FABP5 in breast cancer is presently under study, but their circulating levels in this pathology are poorly known. We analyzed the blood concentrations of FABP4 and FABP5 in breast cancer patients to determine whether there is an association between them and breast cancer. MATERIALS AND METHODS: We studied 294 women in the oncology department with a family history of breast cancer; 198 of the women had breast cancer, and 96 were healthy controls...
July 12, 2017: Oncologist
https://www.readbyqxmd.com/read/28696138/adipoq-adiponectin-induces-cytotoxic-autophagy-in-breast-cancer-cells-through-stk11-lkb1-mediated-activation-of-the-ampk-ulk1-axis
#15
Seung J Chung, Ganji Purnachandra Nagaraju, Arumugam Nagalingam, Nethaji Muniraj, Panjamurthy Kuppusamy, Alyssa Walker, Juhyung Woo, Balázs Győrffy, Ed Gabrielson, Neeraj K Saxena, Dipali Sharma
ADIPOQ/adiponectin, an adipocytokine secreted by adipocytes in the breast tumor microenvironment, negatively regulates cancer cell growth hence increased levels of ADIPOQ/adiponectin are associated with decreased breast cancer growth. However, its mechanisms of action remain largely elusive. We report that ADIPOQ/adiponectin induces a robust accumulation of autophagosomes, increases MAP1LC3B-II/LC3B-II and decreases SQSTM1/p62 in breast cancer cells. ADIPOQ/adiponectin-treated cells and xenografts exhibit increased expression of autophagy-related proteins...
August 3, 2017: Autophagy
https://www.readbyqxmd.com/read/28685099/integrative-analysis-of-pathway-deregulation-in-obesity
#16
Francesc Font-Clos, Stefano Zapperi, Caterina A M La Porta
Obesity is a pandemic disease, linked to the onset of type 2 diabetes and cancer. Transcriptomic data provides a picture of the alterations in regulatory and metabolic activities associated with obesity, but its interpretation is typically blurred by noise. Here, we solve this problem by collecting publicly available transcriptomic data from adipocytes and removing batch effects using singular value decomposition. In this way we obtain a gene expression signature of 38 genes associated to obesity and identify the main pathways involved...
2017: NPJ Systems Biology and Applications
https://www.readbyqxmd.com/read/28681373/the-role-of-tumor-associated-macrophage-in-breast-cancer-biology
#17
REVIEW
Junjeong Choi, Jones Gyamfi, Haerin Jang, Ja Seung Koo
Breast cancer is the most commonly diagnosed malignant tumor in women worldwide and contributes significantly as the primary cause of female cancer related mortality. Hence, research is focused on discovering new and effective treatment targets. The breast tumor microenvironment (TME) comprising of recruited host stromal cells and tumor cells, has recently emerged as an important player in tumor progression, with the potential for future treatment. The TME comprises immune system elements (such as macrophages and lymphocytes), cells composing blood vessel, fibroblast, myofibroblast, mesenchymal stem cells, adipocytes and extracellular matrix (ECM)...
July 6, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28649659/inflammation-of-mammary-adipose-tissue-occurs-in-overweight-and-obese-patients-exhibiting-early-stage-breast-cancer
#18
Charlotte Vaysse, Jon Lømo, Øystein Garred, Frøydis Fjeldheim, Trygve Lofteroed, Ellen Schlichting, Anne McTiernan, Hanne Frydenberg, Anders Husøy, Steinar Lundgren, Morten W Fagerland, Elin Richardsen, Erik A Wist, Catherine Muller, Inger Thune
Growing evidence indicates that adiposity is associated with breast cancer risk and negatively affects breast cancer recurrence and survival, a paracrine role of mammary adipose tissue being very likely in this process. In contrast to other adipose depots, occurrence of a sub-inflammatory state of mammary adipose tissue defined by dying adipocytes surrounded by macrophages forming crown-like structures in overweight and obese subjects, remains only partially described. In a general population of breast cancer patients (107 patients) mostly undergoing breast-conserving surgery, we found a positive association between patient's body composition, breast adipocytes size, and presence of crown-like structures in mammary adipose tissue close to the tumor...
2017: NPJ Breast Cancer
https://www.readbyqxmd.com/read/28630279/obesity-and-p16-ink4a-downregulation-activate-breast-adipocytes-and-promote-their-protumorigenicity
#19
Huda H Al-Khalaf, Mrad Amir, Falah Al-Mohanna, Asma Tulbah, Adher Al-Sayed, Abdelilah Aboussekhra
Obesity is increasingly recognized as a risk factor for breast cancer development. However, the molecular basis of obesity-related breast carcinogenesis remains elusive. In this study, we have shown that obesity reduces the level of the tumor suppressor p16(INK4A) protein in breast adipocytes, which showed active features and strong procarcinogenic potential both in vitro and in orthotopic tumor xenografts compared to mature adipocytes from lean women. Furthermore, obesity triggered epithelial-to-mesenchymal transition (EMT) in breast ductal epithelial cells...
September 1, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28629450/interaction-with-adipocyte-stromal-cells-induces-breast-cancer-malignancy-via-s100a7-upregulation-in-breast-cancer-microenvironment
#20
Minako Sakurai, Yasuhiro Miki, Kiyoshi Takagi, Takashi Suzuki, Takanori Ishida, Noriaki Ohuchi, Hironobu Sasano
BACKGROUND: Breast adipocytes play important roles in both the development and function of mammary epithelial cells. Therefore, carcinoma-adipose stromal cell (ASC) interactions have been considered pivotal in supporting tumor growth in breast cancer. In addition, it has been demonstrated that the biological features of cancer-associated adipocytes differ from those of normal ASCs. Therefore, we investigated an interaction between ASCs and carcinoma cell lines to identify genes associated with ASC invasion of carcinoma cells...
June 19, 2017: Breast Cancer Research: BCR
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