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  • 1
    Publikationsdatum: 2008-04-04
    Beschreibung: Continuous turnover of epithelia is ensured by the extensive self-renewal capacity of tissue-specific stem cells. Similarly, epithelial tumour maintenance relies on cancer stem cells (CSCs), which co-opt stem cell properties. For most tumours, the cellular origin of these CSCs and regulatory pathways essential for sustaining stemness have not been identified. In murine skin, follicular morphogenesis is driven by bulge stem cells that specifically express CD34. Here we identify a population of cells in early epidermal tumours characterized by phenotypic and functional similarities to normal bulge skin stem cells. This population contains CSCs, which are the only cells with tumour initiation properties. Transplants derived from these CSCs preserve the hierarchical organization of the primary tumour. We describe beta-catenin signalling as being essential in sustaining the CSC phenotype. Ablation of the beta-catenin gene results in the loss of CSCs and complete tumour regression. In addition, we provide evidence for the involvement of increased beta-catenin signalling in malignant human squamous cell carcinomas. Because Wnt/beta-catenin signalling is not essential for normal epidermal homeostasis, such a mechanistic difference may thus be targeted to eliminate CSCs and consequently eradicate squamous cell carcinomas.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Malanchi, Ilaria -- Peinado, Hector -- Kassen, Deepika -- Hussenet, Thomas -- Metzger, Daniel -- Chambon, Pierre -- Huber, Marcel -- Hohl, Daniel -- Cano, Amparo -- Birchmeier, Walter -- Huelsken, Joerg -- England -- Nature. 2008 Apr 3;452(7187):650-3. doi: 10.1038/nature06835.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ecole Polytechnique Federale de Lausanne/ISREC (Swiss Institute for Experimental Cancer Research) and National Center of Competence in Research Molecular Oncology, Chemin des Boveresses 155, 1066 Epalinges, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18385740" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antigens, CD34/metabolism ; Cell Line, Tumor ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Epidermis/pathology ; Humans ; Mice ; Mice, Nude ; Neoplasm Transplantation ; Neoplastic Stem Cells/*metabolism/*pathology ; *Signal Transduction ; Skin Neoplasms/*pathology ; beta Catenin/*metabolism
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 1995-12-01
    Beschreibung: The phosphorylation of the human estrogen receptor (ER) serine residue at position 118 is required for full activity of the ER activation function 1 (AF-1). This Ser118 is phosphorylated by mitogen-activated protein kinase (MAPK) in vitro and in cells treated with epidermal growth factor (EGF) and insulin-like growth factor (IGF) in vivo. Overexpression of MAPK kinase (MAPKK) or of the guanine nucleotide binding protein Ras, both of which activate MAPK, enhanced estrogen-induced and antiestrogen (tamoxifen)-induced transcriptional activity of wild-type ER, but not that of a mutant ER with an alanine in place of Ser118. Thus, the activity of the amino-terminal AF-1 of the ER is modulated by the phosphorylation of Ser118 through the Ras-MAPK cascade of the growth factor signaling pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kato, S -- Endoh, H -- Masuhiro, Y -- Kitamoto, T -- Uchiyama, S -- Sasaki, H -- Masushige, S -- Gotoh, Y -- Nishida, E -- Kawashima, H -- Metzger, D -- Chambon, P -- New York, N.Y. -- Science. 1995 Dec 1;270(5241):1491-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Agricultural Chemistry, Tokyo University of Agriculture, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7491495" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Calcium-Calmodulin-Dependent Protein Kinases/*metabolism ; Cell Line ; Enzyme Activation ; Epidermal Growth Factor/pharmacology ; Estradiol/analogs & derivatives/pharmacology ; Estrogen Antagonists/pharmacology ; Humans ; Mitogen-Activated Protein Kinase Kinases ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Polyunsaturated Alkamides ; Protein Kinases/metabolism ; Protein-Serine-Threonine Kinases/metabolism ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-raf ; Proto-Oncogene Proteins p21(ras)/metabolism ; Receptors, Estrogen/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Serine/*metabolism ; Somatomedins/pharmacology ; Tamoxifen/analogs & derivatives/pharmacology ; *Transcriptional Activation/drug effects ; Transfection
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2015-10-24
    Beschreibung: The immune system plays an important role in regulating tumor growth and metastasis. Classical monocytes promote tumorigenesis and cancer metastasis, but how nonclassical "patrolling" monocytes (PMo) interact with tumors is unknown. Here we show that PMo are enriched in the microvasculature of the lung and reduce tumor metastasis to lung in multiple mouse metastatic tumor models. Nr4a1-deficient mice, which specifically lack PMo, showed increased lung metastasis in vivo. Transfer of Nr4a1-proficient PMo into Nr4a1-deficient mice prevented tumor invasion in the lung. PMo established early interactions with metastasizing tumor cells, scavenged tumor material from the lung vasculature, and promoted natural killer cell recruitment and activation. Thus, PMo contribute to cancer immunosurveillance and may be targets for cancer immunotherapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hanna, Richard N -- Cekic, Caglar -- Sag, Duygu -- Tacke, Robert -- Thomas, Graham D -- Nowyhed, Heba -- Herrley, Erica -- Rasquinha, Nicole -- McArdle, Sara -- Wu, Runpei -- Peluso, Esther -- Metzger, Daniel -- Ichinose, Hiroshi -- Shaked, Iftach -- Chodaczek, Grzegorz -- Biswas, Subhra K -- Hedrick, Catherine C -- F32 HL117533-02/HL/NHLBI NIH HHS/ -- R01 CA202987/CA/NCI NIH HHS/ -- R01 HL118765/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2015 Nov 20;350(6263):985-90. doi: 10.1126/science.aac9407. Epub 2015 Oct 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA. rhanna@lji.org hedrick@lji.org. ; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey. ; Izmir Biomedicine and Genome Center, Dokuz Eylul University, Izmir, Turkey. ; Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA. ; Microscopy Core, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA. ; Department of Functional Genomics and Cancer, Institut de Genetique et de Biologie Moleculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Universite de Strasbourg, Illkirch, France. ; Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama, Japan. ; Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26494174" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Immunologic Surveillance/*immunology ; Immunotherapy/methods ; Killer Cells, Natural/immunology ; Lung Neoplasms/*immunology/*secondary/therapy ; Mice ; Mice, Mutant Strains ; Monocytes/*immunology ; Neoplasm Invasiveness ; Neoplasm Metastasis ; Neoplasms, Experimental/immunology/secondary ; Nuclear Receptor Subfamily 4, Group A, Member 1/genetics
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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