Mammary Cell News Volume 13.34 | Sep 9 2021

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    2021-09-09 | MCN 13.34


    Mammary Cell News by STEMCELL Technologies
    Vol. 13.34 – 9 September, 2021
    TOP STORY

    A Single-Cell and Spatially Resolved Atlas of Human Breast Cancers

    Investigators presented a single-cell and spatially resolved transcriptomics analysis of human breast cancers. They developed a single-cell method of intrinsic subtype classification to reveal recurrent neoplastic cell heterogeneity.
    [Nature Genetics]

    Abstract

    Explore tools and resources for your return to the lab
    PUBLICATIONSRanked by the impact factor of the journal

    Chromosomal Instability Sensitizes Patient Breast Tumors to Multipolar Divisions Induced by Paclitaxel

    Researchers showed that patients with breast cancer did not accumulate sufficient intratumoral paclitaxel to induce mitotic arrest in tumor cells. Instead, clinically relevant concentrations induced multipolar mitotic spindle formation.
    [Science Translational Medicine]

    Abstract

    Mammary Tumor Organoid Culture in Non-Adhesive Alginate for Luminal Mechanics and High-Throughput Drug Screening

    Mouse mammary tumor organoids were established by encapsulating tumor pieces in non-adhesive alginate and were treated with doxorubicin and latrunculin A to evaluate their application as a drug screening platform.
    [Advanced Science]

    Full Article

    Single Allele Loss-of-Function Mutations Select and Sculpt Conditional Cooperative Networks in Breast Cancer

    The authors described identification of 1089 gene-centric common insertion sites (gCIS) from transposon-based screens in eight mouse models of breast cancer (BC). Most gCIS showed single allele disruption and many mapped to genomic regions showing high-frequency hemizygous loss in human BC.
    [Nature Communications]

    Full Article

    Proteomics-Derived Basal Biomarker DNA-PKcs Is Associated with Intrinsic Subtype and Long-Term Clinical Outcomes in Breast Cancer

    Scientists evaluated DNA-dependent protein kinase catalytic subunit (DNA-PKcs) expression in clinically-annotated breast cancer tissue microarrays and correlated results with immune biomarkers. They found that high expression of DNA-PKcs was significantly associated with stromal and CD8+ tumor-infiltrating lymphocytes.
    [npj Breast Cancer]

    Full Article

    gp130 Cytokines Activate Novel Signaling Pathways and Alter Bone Dissemination in ER+ Breast Cancer Cells

    In estrogen receptor positive (ER+) cells, oncostatin M (OSM) robustly stimulated phosphorylation of known gp130 signaling targets STAT3, ERK and AKT, while CNTF activated STAT3 signaling. In ER breast cancer cells, OSM alone stimulated AKT and ERK signaling.
    [Journal of Bone and Mineral Research]

    Abstract

    TAZ Maintains Telomere Length in TNBC Cells by Mediating Rad51C Expression

    By knocking down the expression of TAZ in TNBC cells, researchers found that TAZ was essential for the maintenance of telomeres in TNBC cells and that loss of TAZ caused senescence phenotype of TNBC cells.
    [Breast Cancer Research]

    Full Article

    Identification of Novel Microtubule Inhibitors Effective in Fission Yeast and Human Cells and Their Effects on Breast Cancer Cell Lines

    To identify novel small molecules that inhibit microtubule organization, investigators conducted sequential phenotypic screening of fission yeast and human cells and showed that one of the compounds, L1, bound to the colchicine-binding site of microtubules and exhibited a preferential potency against a panel of human breast cancer cell lines compared with a control non-cancer cell line.
    [Open Biology]

    Full Article

    lncRNA BORG:TRIM28 Complexes Drive Metastatic Progression by Inducing a6 Integrin/CD49f Expression in Breast Cancer Stem Cells

    To elucidate the underlying mechanisms that drive breast cancer stem cells (BCSCs) tumorigenicity in TNBC, scientists identified the long noncoding RNA BMP/OP-Responsive Gene (BORG) as an enhancer of BCSC phenotypes.
    [Molecular Cancer Research]

    AbstractFull Article

    TGF-β/Activin Signaling Promotes CDK7 Inhibitor Resistance in Triple Negative Breast Cancer Cells through Upregulation of Multidrug Transporters

    The authors utilized TNBC as a model to discern mechanisms of resistance as it has been previously shown to be highly responsive to CDK7 inhibitors. After generating cell lines with acquired resistance, high throughput RNA-sequencing revealed significant upregulation of genes associated with efflux pumps and transforming growth factor-beta (TGF-β) signaling pathways.
    [Journal of Biological Chemistry]

    Full Article

    The RhoA Dependent Anti-Metastatic Function of RKIP in Breast Cancer

    Researchers showed that RKIP inhibited cancer cell invasion and metastasis by stimulating RhoA anti-tumorigenic functions. Mechanistically, RKIP activated RhoA in an Erk2 and GEF-H1 dependent manner to enhance E-cadherin membrane localization and inhibit CCL5 expression.
    [Scientific Reports]

    Full Article

    Expression of LGR5 in Mammary Myoepithelial Cells and in Triple-Negative Breast Cancers

    Scientists investigated LGR5 expression in normal, benign, and malignant lesions of the human breast using RNA in situ hybridization, and suggested that LGR5 marked facultative stem cells that were involved in post injury regeneration instead of homeostatic stem cells.
    [Scientific Reports]

    Full Article

    A New α-Pyrone from Arthrinium pseudosinense Culture Medium and Its Estrogenic Activity in MCF-7 Cells

    Arthrifuranone A was isolation from an EtOAc-extract of Arthrinium pseudosinense culture medium and evaluated for its estrogenic activity using the MCF-7 estrogen responsive human breast cancer cells.
    [Journal of Antibiotics]

    Abstract

    Virtual Conference Exhibition: Organoids
    REVIEWS

    Refining Patient Selection for Breast Cancer Immunotherapy: Beyond PD-L1

    An intense quest is ongoing for complementary tumor- or host-related predictive biomarkers in breast immuno-oncology. Among the upcoming biomarkers, quantity, immunophenotype and spatial distribution of tumor-infiltrating lymphocytes and other tumor microenvironment cells as well as immune gene signatures emerge as most promising and are being increasingly tested in clinical trials.
    [ESMO Open]

    Full Article

    STAT3 Pathway as a Molecular Target for Resveratrol in Breast Cancer Treatment

    Resveratrol (RES), a naturally occurring phytoalexin, has demonstrated anti-cancer activity in several disease models. The authors describe the STAT3 cascade signaling pathway and address the therapeutic targeting of STAT3 by RES as a tool to mitigate breast cancer.
    [Cancer Cell International]

    Full Article

    INDUSTRY AND POLICY NEWS

    Bolt Biotherapeutics Announces Clinical Collaboration with Bristol Myers Squibb to Study BDC-1001 in Combination with Opdivo® for Treatment of HER2-Expressing Solid Tumors

    Bolt Biotherapeutics, Inc. announced that it has entered into a clinical collaboration and supply agreement with Bristol Myers Squibb to investigate Bolt Biotherapeutics’ BDC-1001 in combination with Bristol Myers Squibb’s PD-1 checkpoint inhibitor Opdivo®.
    [Bolt Biotherapeutics, Inc.]

    Press Release

    FEATURED EVENT

    The NYSCF Conference – New York Stem Cell Foundation

    October 19 – 20, 2021
    Virtual

    > See All Events

    JOB OPPORTUNITIES

    Biomedical Engineering – Biomaterials, Organoids, and Organ-on-a-Chip

    University of Glasgow – Glasgow, Scotland, United Kingdom

    Postdoctoral Fellow – Pathogenesis of Cancer and Neurodegenerative Diseases

    St. Jude Children’s Research Hospital – Memphis, Tennessee, United States

    Senior Research Assistant – RNA Genomics

    Baylor College of Medicine – Houston, Texas, United States

    Assistant Professor – Breast Pathology

    University of Pennsylvania – Philadelphia, Pennsylvania, United States

    Postdoctoral Fellowship – Breast Cancer Immunology and Immunotherapy

    The University of Texas Southwestern Medical Center – Dallas, Texas, United States

    > See All Jobs

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