Mammary Cell News Volume 13.35 | Sep 16 2021

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    2021-09-16 | MCN 13.35


    Mammary Cell News by STEMCELL Technologies
    Vol. 13.35 – 16 September, 2021
    TOP STORY

    NSG-Pro Mouse Model for Uncovering Resistance Mechanisms and Unique Vulnerabilities in Human Luminal Breast Cancers

    Scientists developed a prolactin-humanized Nod-SCID-IL2Rγ (NSG) mouse (NSG-Pro) with physiological human prolactin levels and showed that NSG-Pro mice facilitated establishment of therapy-naïve, estrogen-dependent PDX tumors that progressed to lethal metastatic disease.
    [Science Advances]

    Full Article

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    MYO10 Drives Genomic Instability and Inflammation in Cancer

    Investigators reported that the cytoplasmic unconventional Myosin X (MYO10) regulated genome stability, through which it mediated inflammation in cancer. Inhibiting inflammation or disrupting Myo10 significantly suppressed the growth of both human and mouse breast tumors in mice.
    [Science Advances]

    Full Article

    Inhibition of CK1ε Potentiates the Therapeutic Efficacy of CDK4/6 Inhibitor in Breast Cancer

    The authors reported that inhibition of CDK4/6 promoted βTrCP1-mediated ubiquitination and proteasomal degradation of RB1, and facilitated SP1-mediated CDK6 transcriptional activation.
    [Nature Communications]

    Full Article

    Mammary-Specific Expression of Trim24 Establishes a Mouse Model of Human Metaplastic Breast Cancer

    Comparison of Tripartite motif containing protein 24 (TRIM24) in mouse mammary epithelia (Trim24COE) metaplastic carcinosarcoma morphology, TRIM24 protein levels and a derived Trim24COE gene signature revealed strong correlation with human metaplastic breast cancers (MpBC) tumors and MpBC patient-derived xenograft models.
    [Nature Communications]

    Full Article

    Therapeutic Inhibition of USP9x-Mediated Notch Signaling in Triple-Negative Breast Cancer

    Using a murine TNBC model, scientists showed that USP9x knockdown abrogated Notch activation, reducing the production of the proinflammatory cytokines, C-C motif chemokine ligand 2 and interleukin-1 beta.
    [Proceedings of the National Academy of Sciences of the United States of America]

    Abstract

    Optimizing Metastatic-Cascade-Dependent Rac1 Targeting in Breast Cancer: Guidance Using Optical Window Intravital FRET Imaging

    Using longitudinal intravital imaging of a Rac1-Förster resonance energy transfer (FRET) biosensor mouse coupled with in vivo photoswitching to track intratumoral movement, researchers helped guide treatment scheduling in a live breast cancer setting to impair metastatic progression.
    [Cell Reports]

    Full ArticleGraphical Abstract

    Synergistic PIM Kinase and Proteasome Inhibition as a Therapeutic Strategy for MYC-Overexpressing Triple-Negative Breast Cancer

    The PIM family of kinases has emerged as a factor that is both overexpressed in TNBC and associated with poor outcomes. The authors’ screening effort identified PIM and the 20S proteasome inhibition as the most synergistic combination.
    [Cell Chemical Biology]

    AbstractGraphical Abstract

    EMP3 Negatively Modulates Breast Cancer Cell DNA Replication, DNA Damage Repair, and Stem-Like Properties

    In silico analysis showed that epithelial membrane protein 3 (EMP3) was associated with favorable survival, and negatively regulated cell cycle S-phase. Loss and gain of function studies demonstrated that EMP3 inhibited breast cancer cell S-phage entry, DNA replication, DNA damage repair, and stem-like properties.
    [Cell Death & Disease]

    Full Article

    Tripartite Motif-Containing 3 (TRIM3) Enhances ER Signaling and Confers Tamoxifen Resistance in Breast Cancer

    Researchers observed that TRIM3 was dramatically overexpressed in breast cancer, which correlated with tamoxifen resistance. Furthermore, TRIM3 overexpression significantly correlated with poor survival of patients with ER+ breast cancer treated with tamoxifen.
    [Oncogenesis]

    Full Article

    Effects of Combinatorial Ubiquitinated Protein-Based Nanovaccine and STING Agonist in Mice with Drug-Resistant and Metastatic Breast Cancer

    Investigators enriched ubiquitinated proteins (UPs) from epirubicin (EPB)-induced multi-drug-resistant cancer stem-like breast cancer cell line and tested the efficacy of α-Al2O3-UPs-4T1/EPB as therapeutic vaccine alone and in combination with the stimulator of interferon genes (STING) agonist in mice with drug-resistant and metastatic breast cancer.
    [Frontiers in Immunology]

    Full Article

    TC10 Regulates Breast Cancer Invasion and Metastasis by Controlling Membrane Type-1 Matrix Metalloproteinase at Invadopodia

    The authors demonstrated that TC10, a member of a Cdc42 subfamily of p21 small GTPases, regulated the membrane type 1 matrix metalloproteinase-driven extracellular matrix degradation at invadopodia.
    [Communications Biology]

    Full Article

    Transcriptional Landscape Associated with Triple Negative Breast Cancer (TNBC) Resistance to Neoadjuvant Chemotherapy Revealed by Single Cell RNA-Seq

    Scientists identified the transcriptional landscape associated with TNBC resistance to neoadjuvant chemotherapy at the single cell level by analyzing publicly-available transcriptome data from more than 5,000 single cells derived from four extinction and four persistence patients, revealing remarkable tumor heterogeneity.
    [Molecular Therapy-Oncolytics]

    AbstractFull ArticleGraphical Abstract

    Inhibiting BCKDK in Triple Negative Breast Cancer Suppresses Protein Translation, Impairs Mitochondrial Function, and Potentiates Doxorubicin Cytotoxicity

    TNBC cells treated with doxorubicin exhibited reduced branched-chain ketoacid dehydrogenase kinase (BCKDK) expression and intracellular branched-chain ketoacids (BCKAs). Genetic and pharmacological inhibition of BCKDK in TNBC cell lines also showed a similar reduction in intracellular and secreted BCKAs.
    [Cell Death Discovery]

    Full Article

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    REVIEWS

    Tissue-Agnostic Drug Approvals: How Does This Apply to Patients with Breast Cancer?

    The authors discuss the prevalence of the genomic alterations targeted by agents for tumor-agnostic treatment in breast cancer, their detection methods, the clinical characteristics of patients whose tumors have these alterations, and available data regarding the efficacy of these agents in breast cancer.
    [npj Breast Cancer]

    Full Article

    UCHL1 as a Novel Target in Breast Cancer: Emerging Insights from Cell and Chemical Biology

    Ubiquitin carboxyl terminal hydrolase L1 (UCHL1), a ubiquitin C-terminal hydrolase belonging to the deubiquitinase family of enzymes, is highly expressed in metastatic estrogen receptor negative breast cancer and TNBC, and several key reports have revealed emerging and important roles for UCHL1 in breast cancer.
    [British Journal of Cancer]

    Full Article

    INDUSTRY AND POLICY NEWS

    T-Cure Bioscience Announces US FDA Clearance of Investigator-Initiated Clinical Trial for KK-LC-1 TCR-T against Multiple Solid Tumors

    T–Cure Bioscience, Inc. announced that the US FDA has approved the Investigational New Drug application to initiate a Phase I clinical study evaluating a T cell receptor (TCR)–based product candidate for the treatment of tumors expressing Kita–Kyushu lung cancer antigen 1 (KK-LC-1), such as gastric, cervical, lung, breast cancers and other KK–LC–1 positive epithelial cancers.
    [T–Cure Bioscience, Inc.]

    Press Release

    FEATURED EVENT

    Cambridge Cancer Epigenetics Club: Matthias Merkenschlager

    Nov 5, 2021
    Virtual

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    JOB OPPORTUNITIES

    Postdoctoral Fellow – Breast and Colorectal Cancer

    Dalhousie University – Halifax, Nova Scotia, Canada

    Postdoctoral Fellow – Breast Cancer Research

    University of South Carolina – Columbia – Columbia, South Carolina, United States

    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

    Assistant Professor – Breast Pathology

    University of Pennsylvania – Philadelphia, Pennsylvania, United States

    > See All Jobs

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