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  • 1
    Publication Date: 2014-07-12
    Description: Circulating tumor cells (CTCs) are present at low concentrations in the peripheral blood of patients with solid tumors. It has been proposed that the isolation, ex vivo culture, and characterization of CTCs may provide an opportunity to noninvasively monitor the changing patterns of drug susceptibility in individual patients as their tumors acquire new mutations. In a proof-of-concept study, we established CTC cultures from six patients with estrogen receptor-positive breast cancer. Three of five CTC lines tested were tumorigenic in mice. Genome sequencing of the CTC lines revealed preexisting mutations in the PIK3CA gene and newly acquired mutations in the estrogen receptor gene (ESR1), PIK3CA gene, and fibroblast growth factor receptor gene (FGFR2), among others. Drug sensitivity testing of CTC lines with multiple mutations revealed potential new therapeutic targets. With optimization of CTC culture conditions, this strategy may help identify the best therapies for individual cancer patients over the course of their disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4358808/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4358808/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, Min -- Bardia, Aditya -- Aceto, Nicola -- Bersani, Francesca -- Madden, Marissa W -- Donaldson, Maria C -- Desai, Rushil -- Zhu, Huili -- Comaills, Valentine -- Zheng, Zongli -- Wittner, Ben S -- Stojanov, Petar -- Brachtel, Elena -- Sgroi, Dennis -- Kapur, Ravi -- Shioda, Toshihiro -- Ting, David T -- Ramaswamy, Sridhar -- Getz, Gad -- Iafrate, A John -- Benes, Cyril -- Toner, Mehmet -- Maheswaran, Shyamala -- Haber, Daniel A -- CA129933/CA/NCI NIH HHS/ -- EB008047/EB/NIBIB NIH HHS/ -- P41 EB002503/EB/NIBIB NIH HHS/ -- R01 CA129933/CA/NCI NIH HHS/ -- U01 EB012493/EB/NIBIB NIH HHS/ -- Howard Hughes Medical Institute/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2014 Jul 11;345(6193):216-20. doi: 10.1126/science.1253533.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA. ; Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. Department of Medicine, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. Department of Pathology, Harvard Medical School, Charlestown, MA 02129, USA. Department of Medical Epidemiology and Biostatistics, Karolinska Insitutet, Stockholm, Sweden. ; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA. ; Department of Pathology, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. Department of Pathology, Harvard Medical School, Charlestown, MA 02129, USA. ; Center for Bioengineering in Medicine, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. Department of Pathology, Harvard Medical School, Charlestown, MA 02129, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA. ; Center for Bioengineering in Medicine, Harvard Medical School, Charlestown, MA 02129, USA. Department of Surgery, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. Department of Surgery, Harvard Medical School, Charlestown, MA 02129, USA. maheswaran@helix.mgh.harvard.edu haber@helix.mgh.harvard.edu. ; Massachusetts General Hospital Cancer Center, Harvard Medical School, Charlestown, MA 02129, USA. Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA. Department of Medicine, Harvard Medical School, Charlestown, MA 02129, USA. maheswaran@helix.mgh.harvard.edu haber@helix.mgh.harvard.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25013076" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/*pharmacology/therapeutic use ; Breast Neoplasms/*drug therapy/genetics ; Cell Culture Techniques ; Cell Separation ; Culture ; Drug Resistance, Neoplasm/*genetics ; Drug Screening Assays, Antitumor/methods ; Estrogen Receptor alpha/genetics ; Female ; Gene Frequency ; Humans ; Mice ; Microfluidics/methods ; *Molecular Targeted Therapy ; Mutation ; Neoplastic Cells, Circulating/*drug effects/metabolism ; Phosphatidylinositol 3-Kinases/genetics ; Sequence Analysis, DNA ; Tumor Cells, Cultured ; Xenograft Model Antitumor Assays
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2015-09-19
    Description: Prostate cancer is initially responsive to androgen deprivation, but the effectiveness of androgen receptor (AR) inhibitors in recurrent disease is variable. Biopsy of bone metastases is challenging; hence, sampling circulating tumor cells (CTCs) may reveal drug-resistance mechanisms. We established single-cell RNA-sequencing (RNA-Seq) profiles of 77 intact CTCs isolated from 13 patients (mean six CTCs per patient), by using microfluidic enrichment. Single CTCs from each individual display considerable heterogeneity, including expression of AR gene mutations and splicing variants. Retrospective analysis of CTCs from patients progressing under treatment with an AR inhibitor, compared with untreated cases, indicates activation of noncanonical Wnt signaling (P = 0.0064). Ectopic expression of Wnt5a in prostate cancer cells attenuates the antiproliferative effect of AR inhibition, whereas its suppression in drug-resistant cells restores partial sensitivity, a correlation also evident in an established mouse model. Thus, single-cell analysis of prostate CTCs reveals heterogeneity in signaling pathways that could contribute to treatment failure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miyamoto, David T -- Zheng, Yu -- Wittner, Ben S -- Lee, Richard J -- Zhu, Huili -- Broderick, Katherine T -- Desai, Rushil -- Fox, Douglas B -- Brannigan, Brian W -- Trautwein, Julie -- Arora, Kshitij S -- Desai, Niyati -- Dahl, Douglas M -- Sequist, Lecia V -- Smith, Matthew R -- Kapur, Ravi -- Wu, Chin-Lee -- Shioda, Toshi -- Ramaswamy, Sridhar -- Ting, David T -- Toner, Mehmet -- Maheswaran, Shyamala -- Haber, Daniel A -- 2R01CA129933/CA/NCI NIH HHS/ -- EB008047/EB/NIBIB NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Sep 18;349(6254):1351-6. doi: 10.1126/science.aab0917.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Massachusetts General Cancer Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Cancer Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA. ; Massachusetts General Cancer Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Cancer Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Cancer Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Cancer Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. Department of Urology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. ; Center for Bioengineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. ; Massachusetts General Cancer Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. haber@helix.mgh.harvard.edu smaheswaran@mgh.harvard.edu. ; Massachusetts General Cancer Center, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA. Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA. haber@helix.mgh.harvard.edu smaheswaran@mgh.harvard.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26383955" target="_blank"〉PubMed〈/a〉
    Keywords: Androgen Antagonists/pharmacology/*therapeutic use ; Animals ; Cell Line, Tumor ; Drug Resistance, Neoplasm/*genetics ; Humans ; Male ; Mice ; Neoplastic Cells, Circulating/drug effects/*metabolism ; Phenylthiohydantoin/*analogs & derivatives/pharmacology/therapeutic use ; Prostate/drug effects/metabolism/pathology ; Prostatic Neoplasms/*drug therapy/*pathology ; Proto-Oncogene Proteins/genetics/metabolism ; RNA Splicing ; Receptors, Androgen/*genetics ; Sequence Analysis, RNA/methods ; Signal Transduction ; Single-Cell Analysis/methods ; Transcriptome ; Wnt Proteins/genetics/*metabolism ; Xenograft Model Antitumor Assays
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
  • 4
    Publication Date: 2010-06-01
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 5
    Publication Date: 2000-10-10
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 6
    Publication Date: 2013-02-02
    Description: Mutations in the NF1 tumor suppressor gene cause Neurofibromatosis type 1 (NF1). Neurofibromin, the protein product of NF1 , functions as a negative regulator of Ras activity. Some NF1 patients develop cardiovascular disease, which represents an underrecognized disease complication and contributes to excess morbidity and mortality. Specifically, NF1 patients develop arterial occlusion resulting in tissue ischemia and sudden death. Murine studies demonstrate that heterozygous inactivation of Nf1 ( Nf1 +/– ) in bone marrow cells enhances neointima formation following arterial injury. Macrophages infiltrate Nf1 +/– neointimas, and NF1 patients have increased circulating inflammatory monocytes in their peripheral blood. Therefore, we tested the hypothesis that heterozygous inactivation of Nf1 in myeloid cells is sufficient for neointima formation. Specific ablation of a single copy of the Nf1 gene in myeloid cells alone mobilizes a discrete pro-inflammatory murine monocyte population via a cell autonomous and gene-dosage dependent mechanism. Furthermore, lineage-restricted heterozygous inactivation of Nf1 in myeloid cells is sufficient to reproduce the enhanced neointima formation observed in Nf1 +/– mice when compared with wild-type controls, and homozygous inactivation of Nf1 in myeloid cells amplified the degree of arterial stenosis after arterial injury. Treatment of Nf1 +/– mice with rosuvastatin, a stain with anti-inflammatory properties, significantly reduced neointima formation when compared with control. These studies identify neurofibromin-deficient myeloid cells as critical cellular effectors of Nf1 +/– neointima formation and propose a potential therapeutic for NF1 cardiovascular disease.
    Print ISSN: 0964-6906
    Electronic ISSN: 1460-2083
    Topics: Biology , Medicine
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  • 7
    Publication Date: 2016-02-24
    Description: Persons with neurofibromatosis type 1 (NF1) have a predisposition for premature and severe arterial stenosis. Mutations in the NF1 gene result in decreased expression of neurofibromin, a negative regulator of p21 Ras , and increases Ras signaling. Heterozygous Nf1 ( Nf1 +/– ) mice develop a marked arterial stenosis characterized by proliferating smooth muscle cells (SMCs) and a predominance of infiltrating macrophages, which closely resembles arterial lesions from NF1 patients. Interestingly, lineage-restricted inactivation of a single Nf1 allele in monocytes/macrophages is sufficient to recapitulate the phenotype observed in Nf1 +/– mice and to mobilize proinflammatory CCR2+ monocytes into the peripheral blood. Therefore, we hypothesized that CCR2 receptor activation by its primary ligand monocyte chemotactic protein-1 (MCP-1) is critical for monocyte infiltration into the arterial wall and neointima formation in Nf1 +/– mice. MCP-1 induces a dose-responsive increase in Nf1 +/– macrophage migration and proliferation that corresponds with activation of multiple Ras kinases. In addition, Nf1 +/– SMCs, which express CCR2, demonstrate an enhanced proliferative response to MCP-1 when compared with WT SMCs. To interrogate the role of CCR2 activation on Nf1 +/– neointima formation, we induced neointima formation by carotid artery ligation in Nf1 +/– and WT mice with genetic deletion of either MCP1 or CCR2 . Loss of MCP-1 or CCR2 expression effectively inhibited Nf1 +/– neointima formation and reduced macrophage content in the arterial wall. Finally, administration of a CCR2 antagonist significantly reduced Nf1 +/– neointima formation. These studies identify MCP-1 as a potent chemokine for Nf1 +/– monocytes/macrophages and CCR2 as a viable therapeutic target for NF1 arterial stenosis.
    Print ISSN: 0964-6906
    Electronic ISSN: 1460-2083
    Topics: Biology , Medicine
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  • 8
    Publication Date: 2014-08-20
    Description: The fetal liver is a major hematopoietic site containing progenitor cells that give rise to nearly all blood cells, including B-1 cells. Because the fetal liver is not a de novo site of hematopoietic stem cell (HSC) or progenitor-cell emergence, it must be seeded by yolk sac (YS)-derived erythromyeloid progenitors...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 9
    Publication Date: 2008-03-04
    Print ISSN: 0964-6906
    Electronic ISSN: 1460-2083
    Topics: Biology , Medicine
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  • 10
    Publication Date: 1995-11-01
    Print ISSN: 0964-6906
    Electronic ISSN: 1460-2083
    Topics: Biology , Medicine
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