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proliferation of mammary gland

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https://www.readbyqxmd.com/read/28809839/a-novel-mammary-fat-pad-transplantation-technique-to-visualize-the-vessel-generation-of-vascular-endothelial-stem-cells
#1
Qing Cissy Yu, Wenqian Song, Dengwen Lai, Yi Arial Zeng
Endothelial cells (ECs) are the fundamental building blocks of the vascular architecture and mediate vascular growth and remodeling to ensure proper vessel development and homeostasis. However, studies on endothelial lineage hierarchy remain elusive due to the lack of tools to gain access as well as to directly evaluate their behavior in vivo. To address this shortcoming, a new tissue model to study angiogenesis using the mammary fat pad has been developed. The mammary gland develops mostly in the postnatal stages, including puberty and pregnancy, during which robust epithelium proliferation is accompanied by extensive vascular remodeling...
August 3, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28798533/a-spontaneous-myoepithelial-carcinoma-in-the-mammary-gland-of-an-aged-female-icr-cd-1-mouse
#2
Tsuyoshi Ito, Toshinori Yoshida, Katsumi Soma, Yoshitaka Katoh, Yuko Shimada, Aya Ohnuma-Koyama, Naofumi Takahashi, Yoshimasa Okazaki, Atsushi Shiga, Maki Kuwahara, Takanori Harada
We report a female Crlj:CD1(ICR) mouse with a spontaneous mammary gland tumor composed of biphasic tumor cells, i.e., epithelioid and spindle-shaped myoepithelial cells. Macroscopically, a subcutaneous mass, approximately 3 cm in diameter was found in the lumbodorsal region. Histopathologically, the epithelioid cells proliferated in an alveolar or nest-like growth pattern, occasionally forming glandular-like structures. On the other hand, the spindle-shaped cells proliferated in a sarcomatous pattern. Normal mammary gland was observed in the vicinity of the tumor...
July 2017: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/28798374/culture-independent-assessment-of-human-milk-microbial-community-in-lactational-mastitis
#3
Shriram H Patel, Yati H Vaidya, Reena J Patel, Ramesh J Pandit, Chaitanya G Joshi, Anju P Kunjadiya
Breastfeeding undoubtedly provides important benefits to the mother-infant dyad and should be encouraged. Mastitis, one of the common but major cause of premature weaning among lactating women, is an inflammation of connective tissue within the mammary gland. This study reports the influence of mastitis on human milk microbiota by utilizing 16 S rRNA gene sequencing approach. We sampled and sequenced microbiome from 50 human milk samples, including 16 subacute mastitis (SAM), 16 acute mastitis (AM) and 18 healthy-controls...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28795111/data-describing-lack-of-effects-of-17%C3%AE-ethinyl-estradiol-on-mammary-gland-morphology-in-female-mice-exposed-during-pregnancy-and-lactation
#4
Charlotte D LaPlante, Laura N Vandenberg
Ethinyl estradiol (EE) is a synthetic estrogen used in pharmaceutical contraceptives. In many studies evaluating estrogenic endocrine disruptors, EE is used as a positive control for estrogenicity. However, the effects of EE often differ from the effects of other xenoestrogens, suggesting that these other compounds might act via distinct mechanisms. Reported here are data describing the effect of low doses of EE during pregnancy and lactation on the morphology of the lactating mammary gland in CD-1 mice. The data suggest that these low doses have few if any discernable effects on mammary gland morphology...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28777434/bifunctional-role-of-ephrin-a1-eph-system-in-stimulating-cell-proliferation-and-protecting-cells-from-cell-death-through-the-attenuation-of-er-stress-and-inflammatory-responses-in-bovine-mammary-epithelial-cells
#5
Minkyung Kang, Wooyoung Jeong, Hyocheol Bae, Whasun Lim, Fuller W Bazer, Gwonhwa Song
Structural and functional development of the mammary gland is constant in the mammary gland life cycle. Eph receptors and their ligands, ephrins, control events through cell-to-cell interactions during embryonic development and adult tissue homeostasis; however, little information on participation of ephrin A1, a representative ligand of the Eph receptor, in the development and function of normal mammary glands is known. In this study, we demonstrated functional effects of the ephrin A1-Eph system and mechanisms of its action on bovine mammary epithelial (MAC-T) cells...
August 4, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28759043/genome-wide-screen-for-differentially-methylated-long-noncoding-rnas-identifies-esrp2-and-lncrna-esrp2-as-regulated-by-enhancer-dna-methylation-with-prognostic-relevance-for-human-breast-cancer
#6
K Heilmann, R Toth, C Bossmann, K Klimo, C Plass, C Gerhauser
The majority of long noncoding RNAs (lncRNAs) is still poorly characterized with respect to function, interactions with protein-coding genes, and mechanisms that regulate their expression. As for protein-coding RNAs, epigenetic deregulation of lncRNA expression by alterations in DNA methylation might contribute to carcinogenesis. To provide genome-wide information on lncRNAs aberrantly methylated in breast cancer we profiled tumors of the C3(1) SV40TAg mouse model by MCIp-seq (Methylated CpG Immunoprecipitation followed by sequencing)...
July 31, 2017: Oncogene
https://www.readbyqxmd.com/read/28757476/the-regulatory-mechanisms-and-functional-roles-of-the-hippo-signaling-pathway-in-breast-cancer
#7
Yao Chuanbo, Zhou Xin, Chen Ceshi, Lei Qunying
Hippo signaling pathway has attracted broad attention due to its essential roles in controlling organ size and tumorigenesis. TAZ/YAP, two core downstream molecules of the Hippo signaling pathway in mammals, are tightly regulated by a wide range of extracellular and intrinsic signals in both Hippo signaling pathway-dependent and -independent manners. Besides their roles in the development and function of normal mammary glands, TAZ/YAP display remarkable potency and relevance to multiple aspects of human breast carcinogenesis, including cellular proliferation, differentiation, apoptosis, migration, invasion, epithelial-mesenchymal transition and stemness...
July 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28755943/feeding-an-enhanced-diet-to-holstein-heifers-during-the-preweaning-period-alters-steroid-receptor-expression-and-increases-cellular-proliferation
#8
A J Geiger, C L M Parsons, R M Akers
Preweaning diet and estradiol treatment alters mammary development. Our objectives were to study the effects of diet and estradiol on proliferation of mammary epithelial cells and expression of estrogen receptor α (ESR1) and progesterone receptors (PGR) in these cells. Thirty-six Holstein heifer calves were raised on (1) a control milk replacer fed at 0.44 kg of powder/head per day, dry matter (DM) basis (restricted, R; 20.9% crude protein, 19.8% fat, DM basis), or (2) an enhanced milk replacer fed at 1.08 kg of powder/head per day, DM basis (Enhanced, EH; 28...
July 26, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28727095/bta-mir-130a-regulates-the-biosynthesis-of-bovine-milk-fat-by-targeting-peroxisome-proliferator-activated-receptor-gamma
#9
W C Yang, W L Guo, L S Zan, Y N Wang, K Q Tang
Milk fat determines the quality of milk and is also a main targeted trait in dairy cow breeding. Recent studies have revealed important regulatory roles of microRNAs (miRNA) in milk fat synthesis in the mammary gland. However, the role of miRNA in bovine mammary epithelial cells (BMEC) remains largely unknown. In this study, we found that the overexpression of miR-130a significantly decreased cellular triacylglycerol (TAG) levels and suppressed lipid droplet formation, whereas the inhibition of miR-130a resulted in greater lipid droplet formation and TAG accumulation in BMEC...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28723234/flexible-small-molecular-anti-estrogens-with-n-n-dialkylated-2-5-diethoxy-4-morpholinoaniline-scaffold-targets-multiple-estrogen-receptor-conformations
#10
Bethany K Asare, Emmanuel Yawson, Rajendram V Rajnarayanan
Estrogen mediates various cellular processes including cell proliferation, differentiation, growth and mammary gland function. Estrogen Receptors (ERs) are expressed in 70% of breast cancers. Consequently, estrogen mediated ER signaling plays a critical role in breast cancer diagnosis, prognosis, and treatment. ERs are ligand-triggered transcription factors. However, in the absence of a cognate estrogenic ligand, ERs can be activated by a variety of other extracellular signals. Tamoxifen, an anti-estrogen that selectively targets ER, induces substantial regression of breast tumors and an increase in disease-free survival...
August 3, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28712865/stearic-acid-suppresses-mammary-gland-development-by-inhibiting-pi3k-akt-signaling-pathway-through-gpr120-in-pubertal-mice
#11
Yingying Meng, Cong Yuan, Jing Zhang, Fenglin Zhang, Qin Fu, Xiaotong Zhu, Gang Shu, Lina Wang, Ping Gao, Qianyun Xi, Jiajie Sun, Yongliang Zhang, Qingyan Jiang, Songbo Wang
It has been demonstrated that dietary high fat diet negatively affects the pubertal mammary gland development. The aim of the present study was to investigate the effects of stearic acid (SA), an 18-carbon chain saturated fatty acid, on mammary gland development in pubertal mice and to explore the underlying mechanism. Our results demonstrated that dietary supplementation of 2% SA suppressed mammary duct development, with significant reduction of terminal end bud (TEB) number and ductal branch. In accord, the expression of proliferative marker Cyclin D1 was markedly decreased by dietary SA...
July 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28673316/somatic-loss-of-estrogen-receptor-beta-and-p53-synergize-to-induce-breast-tumorigenesis
#12
Igor Bado, Fotis Nikolos, Gayani Rajapaksa, Wanfu Wu, Jessica Castaneda, Savitri Krishnamurthy, Paul Webb, Jan-Åke Gustafsson, Christoforos Thomas
BACKGROUND: Upregulation of estrogen receptor beta (ERβ) in breast cancer cells is associated with epithelial maintenance, decreased proliferation and invasion, and a reduction in the expression of the receptor has been observed in invasive breast tumors. However, proof of an association between loss of ERβ and breast carcinogenesis is still missing. METHODS: To study the role of ERβ in breast oncogenesis, we generated mouse conditional mutants with specific inactivation of ERβ and p53 in the mammary gland epithelium...
July 3, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28669866/procedures-and-applications-of-long-term-intravital-microscopy
#13
REVIEW
Chloé Prunier, Na Chen, Laila Ritsma, Nienke Vrisekoop
Intravital microscopy (IVM) is increasingly used in biomedical research to study dynamic processes at cellular and subcellular resolution in their natural environment. Long-term IVM especially can be applied to visualize migration and proliferation over days to months within the same animal without recurrent surgeries. Skin can be repetitively imaged without surgery. To intermittently visualize cells in other organs, such as liver, mammary gland and brain, different imaging windows including the abdominal imaging window (AIW), dermal imaging window (DIW) and cranial imaging window (CIW) have been developed...
June 29, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28666461/glyceollins-trigger-anti-proliferative-effects-through-estradiol-dependent-and-independent-pathways-in-breast-cancer-cells
#14
Sylvain Lecomte, Frederic Chalmel, François Ferriere, Frederic Percevault, Nicolas Plu, Christian Saligaut, Claire Surel, Marie Lelong, Theo Efstathiou, Farzad Pakdel
BACKGROUND: Estrogen receptors (ER) α and β are found in both women and men in many tissues, where they have different functions, including having roles in cell proliferation and differentiation of the reproductive tract. In addition to estradiol (E2), a natural hormone, numerous compounds are able to bind ERs and modulate their activities. Among these compounds, phytoestrogens such as isoflavones, which are found in plants, are promising therapeutics for several pathologies. Glyceollins are second metabolites of isoflavones that are mainly produced in soybean in response to an elicitor...
June 30, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/28643224/establishment-of-a-3d-cell-culture-model-of-primary-bovine-mammary-epithelial-cells-extracted-from-fresh-milk
#15
Maria Hillreiner, Nadine I Müller, Heiner M Koch, Christiane Schmautz, Bernhard Küster, Michael W Pfaffl, Heike Kliem
For the investigation of molecular processes underlying diseases of the bovine mammary gland, primary bovine mammary epithelial cells (pbMEC) are used. They are known to contribute to the innate immune system of the bovine mammary gland. The functionality of pbMEC depends on the maintenance of in vivo characteristics. So far, the optimization of pbMEC culture conditions was intended in a variety of experiments. For this purpose, most of the studies used stable cell lines or primary cells obtained from udder biopsies of slaughtered animals...
June 22, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28624497/new-paradigms-for-the-hedgehog-signaling-network-in-mammary-gland-development-and-breast-cancer
#16
REVIEW
Teresa Monkkonen, Michael T Lewis
The Hedgehog signaling network regulates organogenesis, cell fate, proliferation, survival, and stem cell self-renewal in many mammalian tissues. Aberrant activation of the Hedgehog signaling network is present in ~25% of all cancers, including breast. Altered expression of Hedgehog network genes in the mammary gland can elicit phenotypes at many stages of development. However, synthesizing a cohesive mechanistic model of signaling at different stages of development has been difficult. Emerging data suggest that this difficulty is due, in part, to non-canonical and tissue compartment-specific (i...
August 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28624455/cellular-localization-of-atbf1-protein-and-its-functional-implication-in-breast-epithelial-cells
#17
Mei Li, Chi Zhang, Yi Zhong, Jiyuan Zhao
ATBF1, a large transcription factor, was normally localized in nuclei, and its mislocalization to cytoplasm was reported in multiple cancers. However, localization of ATBF1 in breast epithelial cells and its potential functions were unknown. Here, we investigated ATBF1 localization via immunofluorescence staining in different kinds of breast epithelial cells. In MCF10A cells and normal mice mammary gland tissues, ATBF1 was mainly localized in nuclei. Knockdown of ATBF1 expression in MCF10A cells by siRNA promoted cell proliferation...
August 19, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28614209/newly-described-entities-in-salivary-gland-pathology
#18
Alena Skálová, Douglas R Gnepp, James S Lewis, Jennifer L Hunt, Justin A Bishop, Henrik Hellquist, Alessandra Rinaldo, Vincent Vander Poorten, Alfio Ferlito
Salivary glands may give rise to a wide spectrum of different tumors. This review concentrates on 4 salivary gland tumors that have been accepted in the recent literature as new neoplastic entities: mammary analog secretory carcinoma, cribriform adenocarcinoma of minor salivary glands (CASG), sclerosing polycystic adenosis/adenoma (SPA), and the mucinous/secretory variant of myoepithelioma. Mammary analog secretory carcinoma is a distinctive low-grade malignant salivary cancer that harbors a characteristic chromosomal translocation, t(12;15) (p13;q25), resulting in an ETV6-NTRK3 fusion...
August 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28606561/stat5-deletion-in-macrophages-alters-ductal-elongation-and-branching-during-mammary-gland-development
#19
Nicholas J Brady, Michael A Farrar, Kathryn L Schwertfeger
Macrophages are required for proper mammary gland development and maintaining tissue homeostasis. However, the mechanisms by which macrophages regulate this process remain unclear. Here, we identify STAT5 as an important regulator of macrophage function in the developing mammary gland. Analysis of mammary glands from mice with STAT5-deficient macrophages demonstrates delayed ductal elongation, enhanced ductal branching and increased epithelial proliferation. Further analysis reveals that STAT5 deletion in macrophages leads to enhanced expression of proliferative factors such as Cyp19a1/aromatase and IL-6...
August 1, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28593345/exocrine-gland-morphogenesis-insights-into-the-role-of-amphiregulin-from-development-to-disease
#20
REVIEW
Margherita Sisto, Loredana Lorusso, Giuseppe Ingravallo, Sabrina Lisi
Amphiregulin (AREG) is a well-characterized member of the epidermal growth factor (EGF) family and is one of the ligands of the EGF receptor (EGFR). AREG plays a key role in mammalian development and in the control of branching morphogenesis in various organs. Furthermore, AREG participates in a wide range of physiological and pathological processes activating the major intracellular signalling cascades governing cell survival, proliferation and motility. In this article, we review current advances in exocrine glands morphogenesis, focusing on the salivary gland, and discuss the essential aspects of AREG structure, function and regulation, and its differential role within the EGFR family of ligands...
June 7, 2017: Archivum Immunologiae et Therapiae Experimentalis
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