Mammary Cell News Volume 8.14 | Apr 14 2016

Cartilage Oligomeric Matrix Protein Contributes to the Development and Metastasis of Breast Cancer
In vitro experiments confirmed that cartilage oligomeric matrix protein (COMP)-expressing cells had a more invasive phenotype, which could in part be attributed to an upregulation of matrix metalloprotease-9. Furthermore, microarray analyses of gene expression in tumors formed in vivo showed that COMP expression induced higher expression of genes protecting against endoplasmic reticulum stress. [Oncogene]
Abstract | Press Release

miR-155 Downregulates ErbB2 and Suppresses ErbB2-Induced Malignant Transformation of Breast Epithelial Cells
Scientists found that ErbB2 expression was inversely correlated with the level of miR-155, a well-documented oncogenic miRNA, in ErbB2-positive breast tumors. They further determined that miR-155 potently suppresses ErbB2 in breast cancer cells. [Oncogene] Abstract

Chemotherapy-Induced Uridine Diphosphate Release Promotes Breast Cancer Metastasis through P2Y6 Activation
The authors demonstrated that UDP/P2Y6 signaling facilitates breast cancer metastasis both in vitro and in vivo. They found that P2Y6 is not only aberrantly expressed and mutated in most tumor types, but also highly correlated with poor prognosis in breast cancer patients. [Oncotarget] Full Article

GPER Signaling in Both Cancer-Associated Fibroblasts and Breast Cancer Cells Mediates a Feedforward IL1β/IL1R1 Response
Investigators demonstrated that signaling mediated by the G protein estrogen receptor (GPER) triggers IL1β and IL1R1 expression in cancer-associated fibroblasts and breast cancer cells, respectively. [Sci Rep] Full Article

Bioorthogonal Two-Component Drug Delivery in HER2(⁺) Breast Cancer Mouse Models
Researchers developed a two-component, two-step, pre-targeting drug delivery system integrated with image guidance to circumvent these issues. In this strategy, HER2 receptors were pre-labeled with a functionalized trastuzumab antibody followed by the delivery of drug-loaded nanocarriers. [Sci Rep] Full Article

A Novel EGR-1 Dependent Mechanism for YB-1 Modulation of Paclitaxel Response in a Triple Negative Breast Cancer Cell Line
Researchers aimed to determine mechanisms by which Y-box binding protein 1 (YB-1) confers paclitaxel (PTX) resistance. They generated isogenic triple negative breast cancer cell lines that differed by YB-1 levels and treated these with PTX. [Int J Cancer] Abstract

Parthenolide and DMAPT Exert Cytotoxic Effects on Breast Cancer Stem-Like Cells by Inducing Oxidative Stress, Mitochondrial Dysfunction and Necrosis
Researchers report the production of mammospheres from three lines of triple-negative breast cancers cells and demonstrated that both parthenolide and its soluble analog dimethylaminoparthenolide (DMAPT) suppressed this production and induced cytotoxic effects in breast cancer stem-like cells, derived from dissociation of mammospheres. [Cell Death Dis] Full Article

HDAC8 Inhibition Blocks SMC3 Deacetylation and Delays Cell Cycle Progression without Affecting Cohesin-Dependent Transcription in MCF7 Cancer Cells
Scientists blocked deacetylation of ac-SMC3 using an HDAC8-specific inhibitor PCI-34051 in MCF7 breast cancer cells, and examined the effects on transcription of cohesin-dependent genes that respond to estrogen. [J Biol Chem] Abstract | Full Article

CLINICAL RESEARCH

Absolute Benefit of Adjuvant Endocrine Therapies for Premenopausal Women with Hormone Receptor-Positive, Human Epidermal Growth Factor Receptor 2-Negative Early Breast Cancer: TEXT and SOFT Trials
The authors examined absolute treatment effect across a continuum of recurrence risk to individualize endocrine therapy decision making for premenopausal women with human epidermal growth factor receptor 2-negative disease. [J Clin Oncol] Abstract

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iCAD Announces Computer Aided Detection Solution for Fujifilm’s Aspire Cristalle Full Field Digital Mammography
iCAD, Inc. announced that its mammography Computer Aided Detection (CAD) solution is now available on Fujifilm’s Aspire Cristalle full field digital mammography system. [iCAD, Inc.] Press Release

Susan G. Komen Announces over $1 Million in New Grants for Breast Cancer Programs across National Capital Region
Susan G. Komen^® announced over $1 million in new community grants to eight breast cancer organizations serving the National Capital Region. [Susan G. Komen^®] Press Release

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Therapeutic Goods Administration (Australia)

Visit our events page to see a complete list of events in the mammary cell community.

NEW Postdoctoral Fellow – Metastatic Reactivation of Cancer (MD Anderson Cancer Center)

Faculty Position – Cancer Immunology (University of New Mexico)

Faculty Position – Cancer Research (Eppley Institute for Research in Cancer)

Postdoctoral Fellow – Breast Cancer (Northwestern University)

Faculty Position – Tumor Immunology (John Wayne Cancer Institute at Providence Saint John’s Health Center)

Postdoctoral Fellow – Noncoding RNAs in Breast Cancer (University of Texas MD Anderson Cancer Center)

Postdoctoral Fellow – Breast and Ovarian Cancer (Johns Hopkins University School of Medicine)

PhD Fellowship – Breast Cancer (INCLIVA Health Research Institute)

Postdoctoral Fellowship – Platelets in Metastatic Breast and Colon Cancer (Université de Strasbourg)

Research Associate – Breast Cancer and Huntington’s Disease (University of Pittsburgh Drug Discovery Institute)

Postdoctoral Fellowship – Tumor Biology of Breast and Lung Cancer (Cold Spring Harbor Laboratory)

Postdoctoral Fellowship – Microenvironment of Breast Cancer (Icahn School of Medicine)

Postdoctoral Fellowship – Breast and Prostate Cancer Molecular Mechanisms (Feinberg School of Medicine)

Postdoctoral Fellowship – Epigenetic Reprogramming of Breast Cancer Stem Cells (University of Toronto)

Manager – Medical and Breast Imaging (Fred Hutchinson Cancer Research Center)

Clinical Pathways Associate – Cancer Therapeutics (Fred Hutchinson Cancer Research Center)

Director Clinical Research – Medical Oncology (Fred Hutchinson Cancer Research Center)

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