Download or read book Extracellular Matrix Regulation of Estrogen Receptors in Mouse Mammary Cells written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our previous results have shown that the basement membrane (BM) regulated the expression and function of estrogen receptor-alpha (ERa) in mouse mammary epithelial cells. New results shown here indicate that the presence of lactogenic hormones was required for the regulatory effect of BM on ERa levels. We present evidence that cell adhesion to the BM components collagen-IV, through alpha 2 and beta 1 integrin subunits and laminin-l, through alpha 2, alpha 6 and beta 1 subunits are the relevant interactions responsible for transducing the signal of the BM that increases ERa expression. On the other hand, BM- induced changes in cell proliferation and cell morphology were not involved. Thus, the changes observed in ER expression and estrogenic effect when mammary epithelial cells are removed from the gland and placed in culture could be due to the disruption of the tissue organization and, in particular, to the lack of cell-matrix interactions on tissue culture plastic. Our system model could be useful to better understand the mechanisms involved in the regulation of ER expression and function during mammary gland development and breast tumor progression.
Download or read book A Cell Culture Model for Understanding Estrogen Receptor Regulation in Normal and Malignant Cells Addendum written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major obstacles to study the contribution of estrogen receptor (ER) to the initiation and progression of breast cancer is the lack of an appropriate culture model that duplicates the estrogenic effects seen in the normal gland in vivo. We postulate that the correct expression and function of ER depends on an appropriate microenvironment that preserves cell-cell and cell-matrix interactions. Here we determined that the extracellular matrix (ECM) modulates the expression and function of the ER. The stimulation of the ER- mediated response by the presence of cell-matrix interactions involves the a6 integrin subunit. Using quantitative RT-PCR and western blots we also demonstrated that both normal and tumorigenic mouse mammary cell lines in culture increased ERa expression levels in response to ECM and that those levels are higher in the tumorigenic cell line. Moreover, the presence of estradiol decreased the expression of its own receptor in both cell types, two-fold in normal cells and fifteen-fold in tumorigenic cells. Therefore, we believe that the regulatory effect of ECM is exerted, at least in part, by modulating both the ER-mediated response and/or ERa levels itself. In addition, we have developed an in vitr0 culture system for mouse mammary cells isolated from the gland, which partly prevents the loss of ERa expression normally seen in standard culture conditions. This improved technique relies on culturing the cells in 3D cultures inside collagen I gels or on top of Matrigel instead of 2D monolayers, and the addition of lactogenic hormones. These results suggest that the approach that we have chosen to analyze the regulation of ER function by a three-dimensional matrix is promising. The regulation of ER by ECM could be a crucial step in the progression of breast cancer from an ER-positive to an ER- negative tumor, which leads to a hormone-independent and more aggressive cancer phenotype. In addition, manipulating ER expression in mammary cells b7.
Download or read book Role of Stroma Derived Extracellular Matrix in Regulation of Growth and Hormonal Responsiveness of Normal and Cancerous Human Breast Epithelium written by and published by . This book was released on 1999 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extra cellular matrix (ECM) proteins are critical for differentiation of normal mammary epithelial cells, but pronounced changes in ECM occurs during breast cancer. We have determined that estrogen receptor (ER)-positive breast cancer cells (MCF-7 and T47D) cultured on laminin have reduced, or lack, estrogen responses. Estrogen-induced proliferation was significantly reduced on LM but did occur on collagens, fibronectin, poly-L-lysine or vitronectin. laminin did not inhibit IGF-I or EGF induced proliferation, indicating that tumor cells on laminin do not become refractory to mitogens. An endogenous estrogen regulated protein; the progesterone receptor, was not significantly stimulated by estrogen on laminin, but was stimulated on collagen I or fibronectin, indicating that laminin may inhibit ER binding or post-receptor events. However, ER content, ER binding and expression of ER splice variants was not different in different ECM proteins. Estrogen stimulation of ERE transcription was down regulated in MCF-7 cells cultured on laminin. MCF-7 cells injected into nude mice grew 5 times slower when coinjected with LM in response to E (when compared to Col I coinjection), and did not respond to antiestrogens. These studies demonstrate that ECM proteins may regulate estrogen action and anti-estrogen action which are critical in secondary treatment for breast cancer.
Download or read book Regulation of Mouse Mammary Epithelial Cell Differentiation by Cyclin D1 and the Estrogen Receptor written by Nancy Uan-Tsin Lin and published by . This book was released on 1999 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hormonal Regulation of Estrogen and Progesterone Receptors in Mouse Mammary Glands in Vivo written by Yuqian Zhou and published by . This book was released on 1998 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Regulation and Function of Progesterone Receptor Isoforms A and B in the Normal Mouse Mammary Gland written by Mark Douglas Aupperlee and published by . This book was released on 2008 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hormone Action written by Bert W. O'Malley and published by . This book was released on 1974 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hormone assays; Hormone receptors; Evaluation of biological effects of hormones; Purification and synthesis of hormones.
Download or read book Endocrine Disruption and Human Health written by Philippa D. Darbre and published by Academic Press. This book was released on 2015-03-21 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endocrine Disruption and Human Health starts with an overview of what endocrine disruptors are, the issues surrounding them, and the source of these chemicals in the ecosystem. This is followed by an overview of the mechanisms of action and assay systems. The third section includes chapters written by specialists on different aspects of concern for the effects of endocrine disruption on human health. Finally, the authors consider the risk assessment of endocrine disruptors and the pertinent regulation developed by the EU, the US FDA, as well as REACH and NGOs. The book has been written for researchers and research clinicians interested in learning about the actions of endocrine disruptors and current evidence justifying concerns for human health but is useful for those approaching the subject for the first time, graduate students, and advanced undergraduate students. Provides readers with access to a range of information from the basic mechanisms and assays to cutting-edge research investigating concerns for human health Presents a comprehensive, translational look at all aspects of endocrine disruption and its effects on human health Offers guidance on the risk assessment of endocrine disruptors and current relevant regulatory considerations
Download or read book Extracellular Matrix Pathobiology and Signaling written by Nikos Karamanos and published by Walter de Gruyter. This book was released on 2012-08-31 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last decades cell biology and biological chemistry have increasingly turned their attention to the space between cells and revealed an elaborate network of macromolecules essential for structural support, cell adhesion and signaling. This comprehensive handbook of the extracellular matrix will give an overview of the current state of knowledge of matrix components (structure and function), their role in heath and disease (matrix pathobiology) and new aspects related to pharmacological targeting. It will provide an introduction to the extracellular matrix and detailed sections and chapters on: Importance of extracellular matrix in health and disease Matrix proteoglycans (aggrecan, versican, perlecan, SLRPs, syndecans, glypicans, serglycin) Matrix proteinases (remodeling, would healing, regulatory roles in health and disease, metalloproteinases, cystein proteases, plasmin and plasminogen activator system) Glycobiology (hyaluronan and sulfated glycosaminoglycans in cancer, inflammation and metabolic control) Collagens (supramolecular assembly, proteins binding collagen, scaffolds, bacterial and mutated collagens, procollagen proteinases) Cell surface receptors (integrins, syndecans, mechanical strain and TGFb, CD44 and DDR). Biotechnological and pharmacological outlook (matrix regulation by growth factors, hyaluronidases, pathobiology, disease targeting, delivery systems, EMT and proteomics). "The book Extracellular Matrix: Pathobiology and Signaling provides a comprehensive and up to date collection of very relevant topics for understanding the various facets of extracellular matrix and its interactions with cells in normal tissue as well as in disease. It represents the current front-line and will serve as a reference for extracellular matrix and posttranslational modifications." Dick Heinegård, Department of Clinical Sciences Lund, Section Rheumatology, Lund University, Sweden
Download or read book Extracellular Matrix Degradation written by William C. Parks and published by Springer Science & Business Media. This book was released on 2011-04-07 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regulated turnover of extracellular matrix (ECM) is an important component of tissue homeostasis. In recent years, the enzymes that participate in, and control ECM turnover have been the focus of research that touches on development, tissue remodeling, inflammation and disease. This volume in the Biology of Extracellular Matrix series provides a review of the known classes of proteases that degrade ECM both outside and inside the cell. The specific EMC proteases that are discussed include cathepsins, bacterial collagenases, matrix metalloproteinases, meprins, serine proteases, and elastases. The volume also discusses the domains responsible for specific biochemical characteristics of the proteases and the physical interactions that occur when the protease interacts with substrate. The topics covered in this volume provide an important context for understanding the role that matrix-degrading proteases play in normal tissue remodeling and in diseases such as cancer and lung disease.
Download or read book Cutaneous Wound Healing written by Vincent Falanga and published by CRC Press. This book was released on 2001-08-23 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gene therapy, bioengineered skin, and other methods in advanced biology are revolutionizing the treatment of wounds. Written by experts in research and clinical practice, Cutaneous Wound Healing examines the current knowledge and emerging treatment methods. This volume explains the normal molecular and cellular functions that occur when a wound heals, as well as dysfunctional events, such as a chronic wound or an ulcer. Such dysfunctions signal an imbalance in the body, explained here along with possible treatments. The book's mini-atlas is an indispensable reference tool. Dermatologists, plastic surgeons, and general practitioners can benefit from this text.
Download or read book Hormonally Active Agents in the Environment written by National Research Council and published by National Academies Press. This book was released on 2000-02-03 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some investigators have hypothesized that estrogens and other hormonally active agents found in the environment might be involved in breast cancer increases and sperm count declines in humans as well as deformities and reproductive problems seen in wildlife. This book looks in detail at the science behind the ominous prospect of "estrogen mimics" threatening health and well-being, from the level of ecosystems and populations to individual people and animals. The committee identifies research needs and offers specific recommendations to decision-makers. This authoritative volume: Critically evaluates the literature on hormonally active agents in the environment and identifies known and suspected toxicologic mechanisms and effects of fish, wildlife, and humans. Examines whether and how exposure to hormonally active agents occursâ€"in diet, in pharmaceuticals, from industrial releases into the environmentâ€"and why the debate centers on estrogens. Identifies significant uncertainties, limitations of knowledge, and weaknesses in the scientific literature. The book presents a wealth of information and investigates a wide range of examples across the spectrum of life that might be related to these agents.
Download or read book Relaxin and Related Peptides written by Alexander I. Agoulnik and published by Springer Science & Business Media. This book was released on 2008-12-19 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book contains the latest information on diverse biological functions of relaxin and related peptide found since the recent discovery of relaxin receptors. It also describes the evolution of relaxin family peptides and their receptors, molecular mechanisms of ligand/receptor interaction and the analysis of activated signaling pathways.
Download or read book Regulatory Mechanisms in Breast Cancer written by Marc E. Lippman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Breast Cancer: Cellular and Molecular Biology [Kluwer Academic Pub lishers, 1988], we tried to present an introduction to the emerging basic studies on steroid receptors, oncogenes, and growth factors in the regulation of normal and malignant mammary epithelium. The response to this volume was superb, indicating a tremendous interest in basic growth regulatory mechanisms governing breast cancer and controlling its malignant progres sion. In the two years since its publication, much new and exciting in formation has been published and the full interplay of regulatory mechanisms is now beginning to emerge. We have divided this book into four sections that we hope will unify important concepts and help to crystallize areas of consensus and/or disagreement among a diverse group of basic and clinical scientists working on the disease. The first section is devoted to studies on oncogenes, antioncogenes, proliferation, and tumor prognosis. The first chapter, by Sunderland and McGuire, introduces the characteristics of breast cancer as studied by patho logists to establish prognostic outcome. Of particular interest is a new proto oncogene called HER-2 (or neu), which is rapidly becoming accepted as a valuable new tumor marker of poor prognosis. The second chapter, by Lee Bookstein and Lee, introduces the best known antioncogene, the retinoblas toma antioncogene, whose expression is sometimes lost in breast cancer. Malignant progression appears to be influenced by the balance of proto oncogene and antioncogene expression.
Download or read book Oncogene and Cancer written by Yahwardiah Siregar and published by Inst za onkologiju i radiol. This book was released on 2013-01-24 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes a course of cancer growth starting from normal cells to cancerous form and the genomic instability, the cancer treatment as well as its prevention in form of the invention of a vaccine. Some diseases are also discussed in detail, such as breast cancer, leucaemia, cervical cancer, and glioma. Understanding cancer through its molecular mechanism is needed to reduce the cancer incidence. How to treat cancer more effectively and the problems like drug resistance and metastasis are very clearly illustrated in this publication as well as some research result that could be used to treat the cancer patients in the very near future. The book was divided into six main sections: 1. HER2 Carcinogenesis: Etiology, Treatment and Prevention; 2. DNA Repair Mechanism and Cancer; 3. New Approach to Cancer Mechanism; 4. New Role of Oncogenes and Tumor Suppressor Genes; 5. Non Coding RNA and Micro RNA in Tumorigenesis; 6. Oncogenes for Transcription Factors
Download or read book Endocrine Therapy in Breast Cancer written by William R. Miller and published by CRC Press. This book was released on 2002-03-08 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference evaluates and describes the latest strategies for hormone suppression and blockade in the management of early and advanced stage breast cancer and explores the effects of tamoxifen, selective estrogen receptor modulators (SERMs), aromatase inhibitors, and their combination on both breast cancers and normal tissues. Endocrine T
Download or read book Annual Report written by National Cancer Institute (U.S.). Division of Cancer Biology, Diagnosis, and Centers and published by . This book was released on 1995 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
