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Bill R, Wirapati P, Messemaker M, Roh W, Zitti B, Duval F, Kiss M, Park JC, Saal TM, Hoelzl J, Tarussio D, Benedetti F, Tissot S, Kandalaft L, Varrone M, Ciriello G, McKee TA, Monnier Y, Mermod M, Blaum EM, Gushterova I, Gonye ALK, Hacohen N, Getz G, Mempel TR, Klein AM, Weissleder R, Faquin WC, Sadow PM, Lin D, Pai SI, Sade-Feldman M, Pittet MJ. CXCL9:SPP1 macrophage polarity identifies a network of cellular programs that control human cancers. Science 2023; 381:515-524. [PMID: 37535729 PMCID: PMC10755760 DOI: 10.1126/science.ade2292] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 06/22/2023] [Indexed: 08/05/2023]
Abstract
Tumor microenvironments (TMEs) influence cancer progression but are complex and often differ between patients. Considering that microenvironment variations may reveal rules governing intratumoral cellular programs and disease outcome, we focused on tumor-to-tumor variation to examine 52 head and neck squamous cell carcinomas. We found that macrophage polarity-defined by CXCL9 and SPP1 (CS) expression but not by conventional M1 and M2 markers-had a noticeably strong prognostic association. CS macrophage polarity also identified a highly coordinated network of either pro- or antitumor variables, which involved each tumor-associated cell type and was spatially organized. We extended these findings to other cancer indications. Overall, these results suggest that, despite their complexity, TMEs coordinate coherent responses that control human cancers and for which CS macrophage polarity is a relevant yet simple variable.
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Affiliation(s)
- Ruben Bill
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
- AGORA Cancer Research Center, Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA, USA
- Department of Medical Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Pratyaksha Wirapati
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
- AGORA Cancer Research Center, Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
| | - Marius Messemaker
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA, USA
- Division of Molecular Oncology and Immunology, Netherlands Cancer Institute, Amsterdam, Netherlands
| | - Whijae Roh
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Beatrice Zitti
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
- AGORA Cancer Research Center, Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
| | - Florent Duval
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
- AGORA Cancer Research Center, Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
| | - Máté Kiss
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
- AGORA Cancer Research Center, Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
| | - Jong Chul Park
- Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA
| | - Talia M Saal
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA, USA
| | - Jan Hoelzl
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA, USA
- Department of Medical Oncology, Heidelberg University Hospital, Heidelberg, Germany
| | - David Tarussio
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Department of Oncology, Center for Experimental Therapeutics, Lausanne University Hospital (CHUV), Lausanne, Switzerland
- Ludwig Institute for Cancer Research, Lausanne, Switzerland
| | - Fabrizio Benedetti
- Department of Oncology, Center for Experimental Therapeutics, Lausanne University Hospital (CHUV), Lausanne, Switzerland
- Ludwig Institute for Cancer Research, Lausanne, Switzerland
| | - Stéphanie Tissot
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Department of Oncology, Center for Experimental Therapeutics, Lausanne University Hospital (CHUV), Lausanne, Switzerland
- Ludwig Institute for Cancer Research, Lausanne, Switzerland
| | - Lana Kandalaft
- AGORA Cancer Research Center, Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Department of Oncology, Center for Experimental Therapeutics, Lausanne University Hospital (CHUV), Lausanne, Switzerland
- Ludwig Institute for Cancer Research, Lausanne, Switzerland
| | - Marco Varrone
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Department of Computational Biology, University of Lausanne (UNIL), Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Giovanni Ciriello
- AGORA Cancer Research Center, Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Department of Computational Biology, University of Lausanne (UNIL), Lausanne, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Thomas A McKee
- Division of Clinical Pathology, Diagnostic Department, Geneva University Hospitals (HUG), Geneva, Switzerland
| | - Yan Monnier
- Department of Otorhinolaryngology-Head and Neck Surgery, Geneva University Hospitals (HUG), Geneva, Switzerland
| | - Maxime Mermod
- Department of Otorhinolaryngology-Head and Neck Surgery, Geneva University Hospitals (HUG), Geneva, Switzerland
| | - Emily M Blaum
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA
| | - Irena Gushterova
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA
| | - Anna L K Gonye
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA
| | - Nir Hacohen
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA
| | - Gad Getz
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Thorsten R Mempel
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA, USA
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Allon M Klein
- Department of Systems Biology, Harvard Medical School, Boston, MA, USA
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA, USA
- Department of Systems Biology, Harvard Medical School, Boston, MA, USA
- Department of Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - William C Faquin
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
- Department of Otolaryngology Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
| | - Peter M Sadow
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
- Department of Otolaryngology Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
| | - Derrick Lin
- Department of Otolaryngology Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
| | - Sara I Pai
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA, USA
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Moshe Sade-Feldman
- Broad Institute of Harvard and MIT, Cambridge, MA, USA
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA
| | - Mikael J Pittet
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
- AGORA Cancer Research Center, Lausanne, Switzerland
- Swiss Cancer Center Leman, Lausanne, Switzerland
- Center for Systems Biology, Massachusetts General Hospital Research Institute and Harvard Medical School, Boston, MA, USA
- Ludwig Institute for Cancer Research, Lausanne, Switzerland
- Department of Oncology, Geneva University Hospitals (HUG), Geneva, Switzerland
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Christinat Y, Ho L, Clément S, Genestie C, Sehouli J, Cinieri S, Gonzalez Martin A, Denison U, Fujiwara K, Vergote I, Tognon G, Hietanen S, Ray-Coquard I, Pujade-Lauraine E, McKee TA. Normalized LST Is an Efficient Biomarker for Homologous Recombination Deficiency and Olaparib Response in Ovarian Carcinoma. JCO Precis Oncol 2023; 7:e2200555. [PMID: 37364234 PMCID: PMC10581603 DOI: 10.1200/po.22.00555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 02/01/2023] [Accepted: 05/25/2023] [Indexed: 06/28/2023] Open
Abstract
PURPOSE The efficiency of the Myriad Homologous Recombination Deficiency (HRD) test to guide the use of poly (ADP-ribose) polymerase (PARP) inhibitors has been demonstrated in several phase III trials. However, a need exists for alternative clinically validated tests. METHODS A novel biomarker for HRD was developed using The Cancer Genome Atlas database and, as part of the ENGOT HRD European Initiative, applied to 469 samples from the PAOLA-1/ENGOT-ov25 trial. Results were compared with the Myriad myChoice Genomic Instability Score (GIS) with respect to the progression-free survival in the olaparib + bevacizumab and placebo + bevacizumab arms. RESULTS Analysis of the TCGA cohort revealed that a normalization of the number of large-scale state transitions by the number of whole-genome doubling events allows a better separation and classification of HRD samples than the GIS. Analysis of the PAOLA-1 samples, using the Geneva test (OncoScan + nLST), yielded a lower failure rate (27 of 469 v 59 of 469) and a hazard ratio of 0.40 (95% CI, 0.28 to 0.57) compared with 0.37 for Myriad myChoice (BRCAm or GIS+) in the nLST-positive samples. In patients with BRCAwt, the Geneva test identified a novel subpopulation of patients, with a favorable 1-year PFS (85%) but a poor 2-year PFS (30%) on olaparib + bevacizumab treatment. CONCLUSION The proposed test efficiently separates HRD-positive from HRD-negative patients, predicts response to PARP inhibition, and can be easily deployed in a clinical laboratory for routine practice. The performance is similar to the available commercial test, but its lower failure rate allows an increase in the number of patients who will receive a conclusive laboratory result.
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Affiliation(s)
- Yann Christinat
- Hôpitaux Universitaires de Genève, Department of Clinical Pathology, Geneva, Switzerland
| | - Liza Ho
- Hôpitaux Universitaires de Genève, Department of Clinical Pathology, Geneva, Switzerland
| | | | | | - Jalid Sehouli
- Charité—Universitätsmedizin Berlin (CVK), Berlin, Germany
| | - Saverio Cinieri
- U.O.C. Oncologia Medica—Ospedale Senatore Antonio Perrino (Brindisi), Italy
| | | | - Ursula Denison
- Department for Gynaecology and Obstetrics, Institute for gynaecological oncology und senology—Karl Landsteiner, Vienna, Austria
| | - Keiichi Fujiwara
- Saitama Medical University International Medical Center, Saitama, Japan
| | - Ignace Vergote
- University Hospitals Leuven and Leuven Cancer Institute, Leuven, Belgium
| | | | - Sakari Hietanen
- Turku University Hospital, Department of Obstetrics and Gynecology, Turku, Finland
| | | | | | - Thomas A. McKee
- Hôpitaux Universitaires de Genève, Department of Clinical Pathology, Geneva, Switzerland
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Stalin J, Imhof BA, Coquoz O, Jeitziner R, Hammel P, McKee TA, Jemelin S, Poittevin M, Pocard M, Matthes T, Kaci R, Delorenzi M, Rüegg C, Miljkovic-Licina M. Targeting OLFML3 in Colorectal Cancer Suppresses Tumor Growth and Angiogenesis, and Increases the Efficacy of Anti-PD1 Based Immunotherapy. Cancers (Basel) 2021; 13:cancers13184625. [PMID: 34572851 PMCID: PMC8464773 DOI: 10.3390/cancers13184625] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 12/24/2022] Open
Abstract
The role of the proangiogenic factor olfactomedin-like 3 (OLFML3) in cancer is unclear. To characterize OLFML3 expression in human cancer and its role during tumor development, we undertook tissue expression studies, gene expression analyses of patient tumor samples, in vivo studies in mouse cancer models, and in vitro coculture experiments. OLFML3 was expressed at high levels, mainly in blood vessels, in multiple human cancers. We focused on colorectal cancer (CRC), as elevated expression of OLFML3 mRNA correlated with shorter relapse-free survival, higher tumor grade, and angiogenic microsatellite stable consensus molecular subtype 4 (CMS4). Treatment of multiple in vivo tumor models with OLFML3-blocking antibodies and deletion of the Olfml3 gene from mice decreased lymphangiogenesis, pericyte coverage, and tumor growth. Antibody-mediated blockade of OLFML3 and deletion of host Olfml3 decreased the recruitment of tumor-promoting tumor-associated macrophages and increased infiltration of the tumor microenvironment by NKT cells. Importantly, targeting OLFML3 increased the antitumor efficacy of anti-PD-1 checkpoint inhibitor therapy. Taken together, the results demonstrate that OLFML3 is a promising candidate therapeutic target for CRC.
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Affiliation(s)
- Jimmy Stalin
- Department of Pathology and Immunology, University of Geneva Medical School, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (B.A.I.); (P.H.); (S.J.); (M.P.); (M.M.-L.)
- Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, PER17, CH-1700 Fribourg, Switzerland; (O.C.); (C.R.)
- Correspondence: ; Tel.: +41-26-300-8658
| | - Beat A. Imhof
- Department of Pathology and Immunology, University of Geneva Medical School, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (B.A.I.); (P.H.); (S.J.); (M.P.); (M.M.-L.)
- Medicity Research Laboratory, University of Turku, Tykistökatu 6A, 20520 Turku, Finland
| | - Oriana Coquoz
- Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, PER17, CH-1700 Fribourg, Switzerland; (O.C.); (C.R.)
| | - Rachel Jeitziner
- Bioinformatics Core Facility, SIB Swiss Institute of Bioinformatics, CH-1015 Lausanne, Switzerland; (R.J.); (M.D.)
| | - Philippe Hammel
- Department of Pathology and Immunology, University of Geneva Medical School, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (B.A.I.); (P.H.); (S.J.); (M.P.); (M.M.-L.)
| | - Thomas A. McKee
- Division of Clinical Pathology, Geneva University Hospital, Rue Michel Servet 1, CH-1211 Geneva, Switzerland;
| | - Stephane Jemelin
- Department of Pathology and Immunology, University of Geneva Medical School, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (B.A.I.); (P.H.); (S.J.); (M.P.); (M.M.-L.)
| | - Marine Poittevin
- Department of Pathology and Immunology, University of Geneva Medical School, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (B.A.I.); (P.H.); (S.J.); (M.P.); (M.M.-L.)
| | - Marc Pocard
- CAP Paris-Tech, Université de Paris Diderot, INSERM U1275, 49 Boulevard de la Chapelle, CEDEX 10, F-75475 Paris, France; (M.P.); (R.K.)
- Department of Oncologic and Digestive Surgery, AP-HP, Hôpital Lariboisière, 2 Rue Ambroise Paré, CEDEX 10, F-75475 Paris, France
| | - Thomas Matthes
- Department of Oncology, Hematology Service, Geneva University Hospital, Rue Michel Servet 1, CH-1211 Geneva, Switzerland;
- Department of Diagnostics, Clinical Pathology Service, Geneva University Hospital, Rue Michel Servet 1, CH-1211 Geneva, Switzerland
- Translational Research Centre in Oncohaematology, University of Geneva Medical School, Rue Michel Servet 1, CH-1211 Geneva, Switzerland
| | - Rachid Kaci
- CAP Paris-Tech, Université de Paris Diderot, INSERM U1275, 49 Boulevard de la Chapelle, CEDEX 10, F-75475 Paris, France; (M.P.); (R.K.)
- Department of Anatomopathology, AP-HP, Hôpital Lariboisière, 2 Rue Ambroise Paré, CEDEX 10, F-75475 Paris, France
| | - Mauro Delorenzi
- Bioinformatics Core Facility, SIB Swiss Institute of Bioinformatics, CH-1015 Lausanne, Switzerland; (R.J.); (M.D.)
- Department of Oncology, University Lausanne, CH-1011 Lausanne, Switzerland
| | - Curzio Rüegg
- Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, PER17, CH-1700 Fribourg, Switzerland; (O.C.); (C.R.)
| | - Marijana Miljkovic-Licina
- Department of Pathology and Immunology, University of Geneva Medical School, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (B.A.I.); (P.H.); (S.J.); (M.P.); (M.M.-L.)
- Department of Oncology, Hematology Service, Geneva University Hospital, Rue Michel Servet 1, CH-1211 Geneva, Switzerland;
- Department of Diagnostics, Clinical Pathology Service, Geneva University Hospital, Rue Michel Servet 1, CH-1211 Geneva, Switzerland
- Translational Research Centre in Oncohaematology, University of Geneva Medical School, Rue Michel Servet 1, CH-1211 Geneva, Switzerland
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Thouvenin L, Charrier M, Clement S, Christinat Y, Tille JC, Frigeri M, Homicsko K, Michielin O, Bodmer A, Chappuis PO, McKee TA, Tsantoulis P. Ovarian cancer with high-level focal ERBB2 amplification responds to trastuzumab and pertuzumab. Gynecol Oncol Rep 2021; 37:100787. [PMID: 34095423 PMCID: PMC8165411 DOI: 10.1016/j.gore.2021.100787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/03/2021] [Accepted: 05/12/2021] [Indexed: 12/27/2022] Open
Abstract
Epithelial ovarian cancer (EOC) is usually diagnosed at an advanced stage and significantly contributes to cancer mortality in women. Despite multimodal treatment associating chemotherapy and surgery, most patients ultimately progress and require palliative systemic therapy. In EOC, the efficacy of anti-HER2 agents is minimal even after selecting patients for HER2 expression. ERBB2 gene amplification is observed in 3-10% of patients, depending on the specific method of detection and cutoffs. We report the case of a young woman with a FIGO stage IV high-grade serous ovarian cancer with an amplification of ERBB2. She was treated with the association of trastuzumab - pertuzumab after two lines of standard treatment and presented an excellent long-lasting partial response after 36 months of treatment. The association of trastuzumab and pertuzumab, without chemotherapy, has not been previously tested in this context and could be more efficacious than monotherapy with either agent. In addition, the significant benefit observed in this case could be attributed to the presence of a high-level focal amplification that is relatively rare and probably more specific than an increase in HER2 expression. In conclusion, prospective trials of the trastuzumab and pertuzumab combination should be considered in an appropriately selected EOC patient population.
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Affiliation(s)
- Laure Thouvenin
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Mélinda Charrier
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Sophie Clement
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Yann Christinat
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Jean-Christophe Tille
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Mauro Frigeri
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Krisztian Homicsko
- Multidisciplinary Oncology Center, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Olivier Michielin
- Multidisciplinary Oncology Center, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Alexandre Bodmer
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Pierre O. Chappuis
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Thomas A. McKee
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Petros Tsantoulis
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
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5
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Meier RP, Muller YD, Dietrich PY, Tille JC, Nikolaev S, Sartori A, Labidi-Galy I, Ernandez T, Kaur A, Hirsch HH, McKee TA, Toso C, Villard J, Berney T. Immunologic Clearance of a BK Virus-associated Metastatic Renal Allograft Carcinoma. Transplantation 2021; 105:423-429. [PMID: 32091486 PMCID: PMC7837753 DOI: 10.1097/tp.0000000000003193] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 02/01/2020] [Accepted: 02/06/2020] [Indexed: 01/20/2023]
Abstract
BACKGROUND Metastatic carcinoma of a renal allograft is a rare but life threatening event with a difficult clinical management. Recent reports suggested a potential role of BK polyomavirus (BKPyV) in the development of urologic tract malignancies in kidney transplant recipients. METHODS We investigated a kidney-pancreas female recipient with an history of BKPyV nephritis who developed a rapidly progressive and widely metastatic donor-derived renal carcinoma 9 years after transplantation. RESULTS Histology and fluorescence in situ hybridization analysis revealed a donor-derived (XY tumor cells) collecting (Bellini) duct carcinoma. The presence of BKPyV oncogenic large tumor antigen was identified in large amount within the kidney tumor and the bowel metastases. Whole genome sequencing of the tumor confirmed multiple genome BKPyV integrations. The transplanted kidney was removed, immunosuppression was withdrawn, and recombinant interleukin-2 (IL-2) was administered for 3 months, inducing a complete tumor clearance, with no evidence of disease at 6-year follow-up. The immunological profiling during IL-2 therapy revealed the presence of donor-specific T cells and expanded cytokine-producing bright natural killer cells but no donor-specific antibodies. Finally, we found persistently elevated anti-BK virus IgG titers and a specific anti-BKPyV T cell response. CONCLUSIONS This investigation showed evidence for the potential oncogenic role of BKPyV in collecting duct carcinoma in renal allografts and demonstrated that immunosuppression withdrawal and IL-2 therapy can lead to an efficient antitumor cellular mediated rejection possibly via 3 distinct mechanisms including (1) host-versus-graft, (2) host-versus-tumor, and (3) anti-BKPyV responses.
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Affiliation(s)
- Raphael P.H. Meier
- Abdominal Transplant Surgery, Department of Surgery, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
- Transplant Surgery, Department of Surgery, University of California San Francisco, San Francisco, CA
| | - Yannick D. Muller
- Transplant Surgery, Department of Surgery, University of California San Francisco, San Francisco, CA
- Immunology and Transplant Unit, Department Diagnostic, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
| | - Pierre-Yves Dietrich
- Department of Oncology, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
| | - Jean-Christophe Tille
- Diagnostic Department, Geneva University Hospital, and Department of Pathology and Immunology, University of Geneva Medical School, Geneva, Switzerland
| | - Sergey Nikolaev
- Department of Genetic Medicine and Development, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
| | - Ambra Sartori
- Department of Genetic Medicine and Development, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
| | - Intidhar Labidi-Galy
- Department of Oncology, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
| | - Thomas Ernandez
- Division of Nephrology, Department of Medicine, University Hospital of Geneva, Geneva, Switzerland
| | - Amandeep Kaur
- Transplantation and Clinical Virology, Department Biomedicine, University of Basel, Basel, Switzerland
| | - Hans H. Hirsch
- Transplantation and Clinical Virology, Department Biomedicine, University of Basel, Basel, Switzerland
| | - Thomas A. McKee
- Diagnostic Department, Geneva University Hospital, and Department of Pathology and Immunology, University of Geneva Medical School, Geneva, Switzerland
| | - Christian Toso
- Abdominal Transplant Surgery, Department of Surgery, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
| | - Jean Villard
- Immunology and Transplant Unit, Department Diagnostic, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
- Division of Nephrology, Department of Medicine, University Hospital of Geneva, Geneva, Switzerland
| | - Thierry Berney
- Abdominal Transplant Surgery, Department of Surgery, Geneva University Hospital and University of Geneva Medical School, Geneva, Switzerland
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Balaphas A, Gkoufa K, Meyer J, Peloso A, Bornand A, McKee TA, Toso C, Popeskou SG. COVID-19 can mimic acute cholecystitis and is associated with the presence of viral RNA in the gallbladder wall. J Hepatol 2020; 73:1566-1568. [PMID: 32890595 PMCID: PMC7467103 DOI: 10.1016/j.jhep.2020.08.020] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/07/2020] [Accepted: 08/16/2020] [Indexed: 02/07/2023]
Affiliation(s)
- Alexandre Balaphas
- Department of Digestive Surgery, University Hospitals of Geneva, Switzerland.
| | - Kyriaki Gkoufa
- Department of Endocrinology, Diabetology, Nutrition and Patient Education, University Hospitals of Geneva, Switzerland
| | - Jeremy Meyer
- Department of Digestive Surgery, University Hospitals of Geneva, Switzerland
| | - Andrea Peloso
- Department of Digestive Surgery, University Hospitals of Geneva, Switzerland
| | - Aurélie Bornand
- Department of Pathology and Immunology, University Hospitals of Geneva, Switzerland
| | - Thomas A. McKee
- Department of Pathology and Immunology, University Hospitals of Geneva, Switzerland
| | - Christian Toso
- Department of Digestive Surgery, University Hospitals of Geneva, Switzerland
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7
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Koessler T, Paradiso V, Piscuoglio S, Nienhold R, Ho L, Christinat Y, Terracciano LM, Cathomas G, Wicki A, McKee TA, Nouspikel T. Reliability of liquid biopsy analysis: an inter-laboratory comparison of circulating tumor DNA extraction and sequencing with different platforms. J Transl Med 2020; 100:1475-1484. [PMID: 32616816 DOI: 10.1038/s41374-020-0459-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/19/2020] [Accepted: 06/19/2020] [Indexed: 01/11/2023] Open
Abstract
Liquid biopsy, the analysis of circulating tumor DNA (ctDNA), is a promising tool in oncology, especially in personalized medicine. Although its main applications currently focus on selection and adjustment of therapy, ctDNA may also be used to monitor residual disease, establish prognosis, detect relapses, and possibly screen at-risk individuals. CtDNA represents a small and variable proportion of circulating cell-free DNA (ccfDNA) which is itself present at a low concentration in normal individuals and so analyzing ctDNA is technically challenging. Various commercial systems have recently appeared on the market, but it remains difficult for practitioners to compare their performance and to determine whether they yield comparable results. As a first step toward establishing national guidelines for ctDNA analyses, four laboratories in Switzerland joined a comparative exercise to assess ccfDNA extraction and ctDNA analysis by sequencing. Extraction was performed using six distinct methods and yielded ccfDNA of equally high quality, suitable for sequencing. Sequencing of synthetic samples containing predefined amounts of eight mutations was performed on three different systems, with similar results. In all four laboratories, mutations were easily identified down to 1% allele frequency, whereas detection at 0.1% proved challenging. Linearity was excellent in all cases and while molecular yield was superior with one system this did not impact on sensitivity. This study also led to several additional conclusions: First, national guidelines should concentrate on principles of good laboratory practice rather than recommend a particular system. Second, it is essential that laboratories thoroughly validate every aspect of extraction and sequencing, in particular with respect to initial amount of DNA and average sequencing depth. Finally, as software proved critical for mutation detection, laboratories should validate the performance of variant callers and underlying algorithms with respect to various types of mutations.
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Affiliation(s)
- Thibaud Koessler
- Department of Oncology, Geneva University Hospitals, Geneva, Switzerland
| | - Viola Paradiso
- Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland
| | - Salvatore Piscuoglio
- Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland.,Visceral surgery research laboratory, Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Ronny Nienhold
- Institute of Pathology, Cantonal Hospital Basel-Land, Liestal, Switzerland
| | - Liza Ho
- Clinical Pathology Service, Diagnostic Department, Geneva University Hospitals, Geneva, Switzerland
| | - Yann Christinat
- Clinical Pathology Service, Diagnostic Department, Geneva University Hospitals, Geneva, Switzerland
| | - Luigi M Terracciano
- Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland
| | - Gieri Cathomas
- Visceral surgery research laboratory, Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Andreas Wicki
- Department of Oncology & Hematology, Medical University Clinic, Cantonal Hospital Basel-Land, Liestal, and University of Basel, Basel, Switzerland
| | - Thomas A McKee
- Clinical Pathology Service, Diagnostic Department, Geneva University Hospitals, Geneva, Switzerland
| | - Thierry Nouspikel
- Medical Genetics, Diagnostic Department, Geneva University Hospitals, Geneva, Switzerland.
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8
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Zoetemelk M, Ramzy GM, Rausch M, Koessler T, van Beijnum JR, Weiss A, Mieville V, Piersma SR, de Haas RR, Delucinge-Vivier C, Andres A, Toso C, Henneman AA, Ragusa S, Petrova TV, Docquier M, McKee TA, Jimenez CR, Daali Y, Griffioen AW, Rubbia-Brandt L, Dietrich PY, Nowak-Sliwinska P. Optimized low-dose combinatorial drug treatment boosts selectivity and efficacy of colorectal carcinoma treatment. Mol Oncol 2020; 14:2894-2919. [PMID: 33021054 PMCID: PMC7607171 DOI: 10.1002/1878-0261.12797] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/24/2020] [Accepted: 08/11/2020] [Indexed: 12/19/2022] Open
Abstract
The current standard of care for colorectal cancer (CRC) is a combination of chemotherapeutics, often supplemented with targeted biological drugs. An urgent need exists for improved drug efficacy and minimized side effects, especially at late‐stage disease. We employed the phenotypically driven therapeutically guided multidrug optimization (TGMO) technology to identify optimized drug combinations (ODCs) in CRC. We identified low‐dose synergistic and selective ODCs for a panel of six human CRC cell lines also active in heterotypic 3D co‐culture models. Transcriptome sequencing and phosphoproteome analyses showed that the mechanisms of action of these ODCs converged toward MAP kinase signaling and cell cycle inhibition. Two cell‐specific ODCs were translated to in vivo mouse models. The ODCs reduced tumor growth by ~80%, outperforming standard chemotherapy (FOLFOX). No toxicity was observed for the ODCs, while significant side effects were induced in the group treated with FOLFOX therapy. Identified ODCs demonstrated significantly enhanced bioavailability of the individual components. Finally, ODCs were also active in primary cells from CRC patient tumor tissues. Taken together, we show that the TGMO technology efficiently identifies selective and potent low‐dose drug combinations, optimized regardless of tumor mutation status, outperforming conventional chemotherapy.
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Affiliation(s)
- Marloes Zoetemelk
- Molecular Pharmacology Group, School of Pharmaceutical Sciences, University of Geneva, Switzerland.,Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Switzerland.,Translational Research Center in Oncohaematology, Geneva, Switzerland
| | - George M Ramzy
- Molecular Pharmacology Group, School of Pharmaceutical Sciences, University of Geneva, Switzerland.,Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Switzerland.,Translational Research Center in Oncohaematology, Geneva, Switzerland
| | - Magdalena Rausch
- Molecular Pharmacology Group, School of Pharmaceutical Sciences, University of Geneva, Switzerland.,Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Switzerland.,Translational Research Center in Oncohaematology, Geneva, Switzerland
| | - Thibaud Koessler
- Department of Oncology, Geneva University Hospitals and Faculty of Medicine, Switzerland
| | - Judy R van Beijnum
- Angiogenesis Laboratory, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC-location VUmc, VU University Amsterdam, The Netherlands
| | - Andrea Weiss
- Molecular Pharmacology Group, School of Pharmaceutical Sciences, University of Geneva, Switzerland.,Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Switzerland
| | - Valentin Mieville
- Molecular Pharmacology Group, School of Pharmaceutical Sciences, University of Geneva, Switzerland.,Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Switzerland
| | - Sander R Piersma
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands.,OncoProteomics Laboratory, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands
| | - Richard R de Haas
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands.,OncoProteomics Laboratory, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands
| | | | - Axel Andres
- Translational Department of Digestive and Transplant Surgery, Geneva University Hospitals and Faculty of Medicine, Switzerland.,Hepato-Pancreato-Biliary Centre, Geneva University Hospitals and Faculty of Medicine, Switzerland
| | - Christian Toso
- Translational Department of Digestive and Transplant Surgery, Geneva University Hospitals and Faculty of Medicine, Switzerland.,Hepato-Pancreato-Biliary Centre, Geneva University Hospitals and Faculty of Medicine, Switzerland
| | - Alexander A Henneman
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands.,OncoProteomics Laboratory, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands
| | - Simone Ragusa
- Department of Oncology, University of Lausanne, Switzerland.,Ludwig Institute for Cancer Research Lausanne, Switzerland
| | - Tatiana V Petrova
- Department of Oncology, University of Lausanne, Switzerland.,Ludwig Institute for Cancer Research Lausanne, Switzerland
| | - Mylène Docquier
- iGE3 Genomics Platform, University of Geneva, Switzerland.,Department of Genetics & Evolution, University of Geneva, Switzerland
| | - Thomas A McKee
- Division of Clinical Pathology, Diagnostic Department, University Hospitals of Geneva (HUG), Switzerland
| | - Connie R Jimenez
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands.,OncoProteomics Laboratory, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, The Netherlands
| | - Youssef Daali
- Division of Clinical Pharmacology and Toxicology, Department of Anaesthesiology, Intensive Care and Emergency Medicine, Geneva University Hospitals, Pharmacology, Switzerland
| | - Arjan W Griffioen
- Angiogenesis Laboratory, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC-location VUmc, VU University Amsterdam, The Netherlands
| | - Laura Rubbia-Brandt
- Division of Clinical Pathology, Diagnostic Department, University Hospitals of Geneva (HUG), Switzerland
| | - Pierre-Yves Dietrich
- Translational Research Center in Oncohaematology, Geneva, Switzerland.,Department of Oncology, Geneva University Hospitals and Faculty of Medicine, Switzerland
| | - Patrycja Nowak-Sliwinska
- Molecular Pharmacology Group, School of Pharmaceutical Sciences, University of Geneva, Switzerland.,Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Switzerland.,Translational Research Center in Oncohaematology, Geneva, Switzerland
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9
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Calvo Tardón M, Marinari E, Migliorini D, Bes V, Tankov S, Charrier E, McKee TA, Dutoit V, Dietrich PY, Cosset E, Walker PR. An Experimentally Defined Hypoxia Gene Signature in Glioblastoma and Its Modulation by Metformin. Biology (Basel) 2020; 9:biology9090264. [PMID: 32887267 PMCID: PMC7563149 DOI: 10.3390/biology9090264] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/10/2020] [Accepted: 08/21/2020] [Indexed: 02/07/2023]
Abstract
Glioblastoma multiforme (GBM) is the most common and aggressive primary brain tumor, characterized by a high degree of intertumoral heterogeneity. However, a common feature of the GBM microenvironment is hypoxia, which can promote radio- and chemotherapy resistance, immunosuppression, angiogenesis, and stemness. We experimentally defined common GBM adaptations to physiologically relevant oxygen gradients, and we assessed their modulation by the metabolic drug metformin. We directly exposed human GBM cell lines to hypoxia (1% O2) and to physioxia (5% O2). We then performed transcriptional profiling and compared our in vitro findings to predicted hypoxic areas in vivo using in silico analyses. We observed a heterogenous hypoxia response, but also a common gene signature that was induced by a physiologically relevant change in oxygenation from 5% O2 to 1% O2. In silico analyses showed that this hypoxia signature was highly correlated with a perinecrotic localization in GBM tumors, expression of certain glycolytic and immune-related genes, and poor prognosis of GBM patients. Metformin treatment of GBM cell lines under hypoxia and physioxia reduced viable cell number, oxygen consumption rate, and partially reversed the hypoxia gene signature, supporting further exploration of targeting tumor metabolism as a treatment component for hypoxic GBM.
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Affiliation(s)
- Marta Calvo Tardón
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
| | - Eliana Marinari
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
| | - Denis Migliorini
- Department of Oncology, Clinical Research Unit, Dubois Ferrière Dinu Lipatti Research Foundation, Geneva University Hospitals, 1205 Geneva, Switzerland;
| | - Viviane Bes
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
| | - Stoyan Tankov
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
| | - Emily Charrier
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
| | - Thomas A McKee
- Division of Clinical Pathology, Geneva University Hospitals, 1211 Geneva, Switzerland;
| | - Valérie Dutoit
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
| | - Pierre-Yves Dietrich
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
| | - Erika Cosset
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
| | - Paul R Walker
- Center for Translational Research in Onco-Hematology, Division of Oncology, Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland; (M.C.T.); (E.M.); (V.B.); (S.T.); (E.C.); (V.D.); (P.-Y.D.); (E.C.)
- Correspondence: ; Tel.: +41-223795079
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10
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Frisone D, Charrier M, Clement S, Christinat Y, Thouvenin L, Homicsko K, Michielin O, Bodmer A, Chappuis PO, McKee TA, Tsantoulis P. Durable response to palbociclib and letrozole in ovarian cancer with CDKN2A loss. Cancer Biol Ther 2019; 21:197-202. [PMID: 31709901 PMCID: PMC7012162 DOI: 10.1080/15384047.2019.1685291] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 10/13/2019] [Accepted: 10/22/2019] [Indexed: 01/27/2023] Open
Abstract
Alterations of the Retinoblastoma (Rb) pathway are frequent in ovarian cancer, typically resulting from CDKN2A down-regulation, CCNE1 amplification, CCND1/2 amplification, and RB1 loss. However, bi-allelic CDKN2A mutation or homozygous deletion is a very rare event, concerning less than 5% of patients.Initial trials with palbociclib in serous ovarian cancer have shown very modest benefit in unselected patient populations, thus underlining the need for a biomarker predicting response. We report the case of a heavily pre-treated patient with a serous ovarian tumor harboring a homozygous deletion of the CDKN2A gene that derived significant, prolonged clinical benefit from palbociclib, a CDK4/6 oral inhibitor, with letrozole. Treatment with palbociclib and letrozole started on February 2018, with an ongoing response after 12 months.In conclusion, homozygous CDKN2A deletion is rare and could be used to predict response to CDK4/6 inhibitors in association with other genomic features. We encourage further trials in this direction.
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Affiliation(s)
- Daniele Frisone
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Melinda Charrier
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Sophie Clement
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Yann Christinat
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Laure Thouvenin
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Krisztian Homicsko
- Multidisciplinary Oncology Center, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Olivier Michielin
- Multidisciplinary Oncology Center, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Alexandre Bodmer
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Pierre O. Chappuis
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Thomas A. McKee
- Department of Genetic Medicine, Laboratory and Pathology, University Hospitals of Geneva (HUG), Geneva, Switzerland
| | - Petros Tsantoulis
- Department of Oncology, University Hospitals of Geneva (HUG), Geneva, Switzerland
- Department of Medical Specialties Faculty of Medicine, University of Geneva, Geneva, Switzerland
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11
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Rougemont AL, Berczy M, Lin Marq N, McKee TA, Christinat Y. Targeted RNA-sequencing identifies FBXW4 instead of MGEA5 as fusion partner of TGFBR3 in pleomorphic hyalinizing angiectatic tumor. Virchows Arch 2019; 475:251-254. [PMID: 30911815 DOI: 10.1007/s00428-019-02556-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 02/12/2019] [Accepted: 03/03/2019] [Indexed: 11/28/2022]
Abstract
Pleomorphic hyalinizing angiectatic tumor (PHAT) is a rare mesenchymal tumor of intermediate malignancy. PHAT, and the related hemosiderotic fibrolipomatous tumor, show a recurrent t(1;10)(p22;q24). Fluorescence in situ hybridization (FISH) and BAC (bacterial artificial chromosome) clones have previously identified TGFBR3 and MGEA5 as fusion partners. However, targeted RNA-sequencing allowed for the correct identification of FBXW4 and not MGEA5 as the fusion partner of TGFBR3 in a subcutaneous PHAT, a finding further confirmed by RT-PCR. FBXW4 and MGEA5 share a common cytogenetic location at 10q24.32, thereby suggesting that the use of less precise technology may have led to inaccurate gene identification. The study of additional cases is however required.
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Affiliation(s)
- Anne-Laure Rougemont
- Division of Clinical P athology, Molecular Pathology Unit, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1211, Geneva, Switzerland.
| | - Margaret Berczy
- Division of Clinical P athology, Molecular Pathology Unit, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1211, Geneva, Switzerland
| | - Nathalie Lin Marq
- Division of Clinical P athology, Molecular Pathology Unit, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1211, Geneva, Switzerland
| | - Thomas A McKee
- Division of Clinical P athology, Molecular Pathology Unit, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1211, Geneva, Switzerland
| | - Yann Christinat
- Division of Clinical P athology, Molecular Pathology Unit, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1211, Geneva, Switzerland
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12
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Py C, Christinat Y, Kreutzfeldt M, McKee TA, Dietrich PY, Tsantoulis P. Response of NF1-Mutated Melanoma to an MEK Inhibitor. JCO Precis Oncol 2018; 2:1-11. [DOI: 10.1200/po.18.00028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Céline Py
- All authors: University Hospital of Geneva, Geneva, Switzerland
| | - Yann Christinat
- All authors: University Hospital of Geneva, Geneva, Switzerland
| | | | - Thomas A. McKee
- All authors: University Hospital of Geneva, Geneva, Switzerland
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13
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Nisa L, Barras D, Medová M, Aebersold DM, Medo M, Poliaková M, Koch J, Bojaxhiu B, Eliçin O, Dettmer MS, Angelino P, Giger R, Borner U, Caversaccio MD, Carey TE, Ho L, McKee TA, Delorenzi M, Zimmer Y. Comprehensive Genomic Profiling of Patient-matched Head and Neck Cancer Cells: A Preclinical Pipeline for Metastatic and Recurrent Disease. Mol Cancer Res 2018; 16:1912-1926. [PMID: 30108165 DOI: 10.1158/1541-7786.mcr-18-0056] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 04/28/2018] [Accepted: 08/07/2018] [Indexed: 11/16/2022]
Abstract
Metastases and tumor recurrence have a major prognostic impact in head and neck squamous cell carcinoma (HNSCC); however, cellular models that comprehensively characterize metastatic and recurrent HNSCC are lacking. To this end, we obtained genomic, transcriptomic, and copy number profiles of the UM-SCC cell line panel, encompassing patient-matched metastatic and recurrent cells. UM-SCC cells recapitulate the most prevalent genomic alterations described in HNSCC, featuring common TP53, PI3K, NOTCH, and Hippo pathway mutations. This analysis identified a novel F977Y kinase domain PIK3CA mutation exclusively present in a recurrent cell line (UM-SCC14B), potentially conferring resistance to PI3K inhibitors. Small proline-rich protein 2A (SPRR2A), a protein involved in epithelial homeostasis and invasion, was one of the most consistently downregulated transcripts in metastatic and recurrent UM-SCC cells. Assessment of SPRR2A protein expression in a clinical cohort of patients with HNSCC confirmed common SPRR2A downregulation in primary tumors (61.9% of cases) and lymph node metastases (31.3%), but not in normal tissue. High expression of SPRR2A in lymph node metastases was, along with nonoropharyngeal location of the primary tumor, an independent prognostic factor for regional disease recurrence after surgery and radiotherapy (HR 2.81; 95% CI, 1.16-6.79; P = 0.02). These results suggest that SPRR2A plays a dual role in invasion and therapeutic resistance in HNSCC, respectively through its downregulation and overexpression. IMPLICATIONS: The current study reveals translationally relevant mechanisms underlying metastasis and recurrence in HNSCC and represents an adjuvant tool for preclinical research in this disease setting. Underlining its discovery potential this approach identified a PIK3CA-resistant mutation as well as SPRR2A as possible theragnostic markers.
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Affiliation(s)
- Lluís Nisa
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department of Otorhinolaryngology - Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - David Barras
- SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Michaela Medová
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Daniel M Aebersold
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Matúš Medo
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Michaela Poliaková
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Jonas Koch
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department for BioMedical Research, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Beat Bojaxhiu
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Olgun Eliçin
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | | | - Paolo Angelino
- SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Roland Giger
- Department of Otorhinolaryngology - Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Urs Borner
- Department of Otorhinolaryngology - Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Marco D Caversaccio
- Department of Otorhinolaryngology - Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Thomas E Carey
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan School of Medicine, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan School of Medicine, Ann Arbor, Michigan
| | - Liza Ho
- Division of Clinical Pathology, Geneva University Hospitals, Geneva, Switzerland
| | - Thomas A McKee
- Division of Clinical Pathology, Geneva University Hospitals, Geneva, Switzerland
| | - Mauro Delorenzi
- SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland.,Ludwig Center for Cancer Research, University of Lausanne, Lausanne, Switzerland.,Department of Oncology, University of Lausanne, Lausanne, Switzerland
| | - Yitzhak Zimmer
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland. .,Department for BioMedical Research, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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14
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El-Ayadi M, Egervari K, Merkler D, McKee TA, Gumy-Pause F, Stichel D, Capper D, Pietsch T, Ansari M, von Bueren AO. Concurrent IDH1 and SMARCB1 Mutations in Pediatric Medulloblastoma: A Case Report. Front Neurol 2018; 9:398. [PMID: 29971034 PMCID: PMC6018091 DOI: 10.3389/fneur.2018.00398] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 05/15/2018] [Indexed: 01/22/2023] Open
Abstract
Isocitrate Dehydrogenase-1 (IDH1) is a driver gene in several cancers including brain tumors such as low-grade and high-grade gliomas. Mutations of SMARCB1 were described in atypical teratoid rhabdoid tumors and to date have not been associated with the pathogenesis of medulloblastoma. We report concurrent IDH1 and SMARCB1 mutations in a medulloblastoma patient. We searched the catalog of somatic mutations in cancer (COSMIC) database and other mutation databases and -to our knowledge- this is the first reported case of medulloblastoma harboring both mutations together. Our patient is a 13-year-old male presenting with headache and vomiting at diagnosis. MRI revealed left cerebellar expansive lesion with no evidence of metastasis. A histopathological diagnosis of desmoplastic/nodular medulloblastoma was made after complete resection of the tumor. Immunophenotypic characterization and methylation profiling suggested a medulloblastoma with SHH activation. Next generation sequencing of a panel of 400 genes revealed heterozygous somatic IDH1(p.R132C), SMARCB1(p.R201Q), and CDH11(p.L625T) mutations. The patient was treated according to the HIT-SIOP PNET 4 protocol. He is in complete remission more than 2 years after diagnosis. In conclusion, increasing use of high throughput sequencing will certainly increase the frequency with which rare mutations or mutation combinations are identified. The exact frequency of this mutation combination and whether it has any particular therapeutic implications or prognostic relevance requires further investigation.
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Affiliation(s)
- Moatasem El-Ayadi
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, Geneva University Hospitals (HUG), Geneva, Switzerland
- CANSEARCH Research Laboratory, Department of Pediatrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Department of Pediatric Oncology, National Cancer Institute, Cairo University, Cairo, Egypt
- Department of Pediatric Oncology, Children Cancer Hospital of Egypt, Cairo, Egypt
| | - Kristof Egervari
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Division of Clinical Pathology, Geneva University Hospitals (HUG), Geneva, Switzerland
| | - Doron Merkler
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Division of Clinical Pathology, Geneva University Hospitals (HUG), Geneva, Switzerland
| | - Thomas A. McKee
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Division of Clinical Pathology, Geneva University Hospitals (HUG), Geneva, Switzerland
| | - Fabienne Gumy-Pause
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, Geneva University Hospitals (HUG), Geneva, Switzerland
- CANSEARCH Research Laboratory, Department of Pediatrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Damian Stichel
- Clinical Cooperation Unit Neuropathology, German Cancer Consortium, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - David Capper
- Department of Neuropathology, Charité — Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Partner Site Berlin, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Torsten Pietsch
- Institute of Neuropathology, Brain Tumor Reference Center, Deutsche Gesellschaft für Neuropathologie und Neuroanatomie, University of Bonn Medical Center, Bonn, Germany
| | - Marc Ansari
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, Geneva University Hospitals (HUG), Geneva, Switzerland
- CANSEARCH Research Laboratory, Department of Pediatrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - André O. von Bueren
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, Geneva University Hospitals (HUG), Geneva, Switzerland
- CANSEARCH Research Laboratory, Department of Pediatrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland
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15
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Tille JC, Ho L, Shah J, Seyde O, McKee TA, Citi S. The Expression of the Zonula Adhaerens Protein PLEKHA7 Is Strongly Decreased in High Grade Ductal and Lobular Breast Carcinomas. PLoS One 2015; 10:e0135442. [PMID: 26270346 PMCID: PMC4535953 DOI: 10.1371/journal.pone.0135442] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 07/22/2015] [Indexed: 01/11/2023] Open
Abstract
PLEKHA7 is a junctional protein, which participates in a complex that stabilizes E-cadherin at the zonula adhaerens. Since E-cadherin is involved in epithelial morphogenesis, signaling, and tumor progression, we explored PLEKHA7 expression in cancer. PLEKHA7 expression was assessed in invasive ductal and lobular carcinomas of the breast by immunohistochemistry, immunofluorescence and quantitative RT-PCR. PLEKHA7 was detected at epithelial junctions of normal mammary ducts and lobules, and of tubular and micropapillary structures within G1 and G2 ductal carcinomas. At these junctions, the localization of PLEKHA7 was along the circumferential belt (zonula adhaerens), and only partially overlapping with that of E-cadherin, p120ctn and ZO-1, as shown previously in rodent tissues. PLEKHA7 immunolabeling was strongly decreased in G3 ductal carcinomas and undetectable in lobular carcinomas. PLEKHA7 mRNA was detected in both ductal and lobular carcinomas, with no observed correlation between mRNA levels and tumor type or grade. In summary, PLEKHA7 is a junctional marker of epithelial cells within tubular structures both in normal breast tissue and ductal carcinomas, and since PLEKHA7 protein but not mRNA expression is strongly decreased or lost in high grade ductal carcinomas and in lobular carcinomas, loss of PLEKHA7 is a newly characterized feature of these carcinomas.
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Affiliation(s)
| | - Liza Ho
- Division of Clinical Pathology, Geneva University Hospitals, Geneva, Switzerland
| | - Jimit Shah
- Department of Cell Biology, University of Geneva, Geneva, Switzerland
- Institute of Genomics and Genetics of Geneva (iGE3), University of Geneva, Geneva, Switzerland
| | - Olivia Seyde
- Division of Clinical Pathology, Geneva University Hospitals, Geneva, Switzerland
| | - Thomas A. McKee
- Division of Clinical Pathology, Geneva University Hospitals, Geneva, Switzerland
| | - Sandra Citi
- Department of Cell Biology, University of Geneva, Geneva, Switzerland
- Institute of Genomics and Genetics of Geneva (iGE3), University of Geneva, Geneva, Switzerland
- * E-mail:
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16
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Steiner C, Tille JC, Lamerz J, Kux van Geijtenbeek S, McKee TA, Venturi M, Rubbia-Brandt L, Hochstrasser D, Cutler P, Lescuyer P, Ducret A. Quantification of HER2 by Targeted Mass Spectrometry in Formalin-Fixed Paraffin-Embedded (FFPE) Breast Cancer Tissues. Mol Cell Proteomics 2015; 14:2786-99. [PMID: 26149442 DOI: 10.1074/mcp.o115.049049] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Indexed: 11/06/2022] Open
Abstract
The ability to accurately quantify proteins in formalin-fixed paraffin-embedded tissues using targeted mass spectrometry opens exciting perspectives for biomarker discovery. We have developed and evaluated a selectedreaction monitoring assay for the human receptor tyrosine-protein kinase erbB-2 (HER2) in formalin-fixed paraffin-embedded breast tumors. Peptide candidates were identified using an untargeted mass spectrometry approach in relevant cell lines. A multiplexed assay was developed for the six best candidate peptides and evaluated for linearity, precision and lower limit of quantification. Results showed a linear response over a calibration range of 0.012 to 100 fmol on column (R(2): 0.99-1.00).The lower limit of quantification was 0.155 fmol on column for all peptides evaluated. The six HER2 peptides were quantified by selected reaction monitoring in a cohort of 40 archival formalin-fixed paraffin-embedded tumor tissues from women with invasive breast carcinomas, which showed different levels of HER2 gene amplification as assessed by standard methods used in clinical pathology. The amounts of the six HER2 peptides were highly and significantly correlated with each other, indicating that peptide levels can be used as surrogates of protein amounts in formalin-fixed paraffin-embedded tissues. After normalization for sample size, selected reaction monitoring peptide measurements were able to correctly predict 90% of cases based on HER2 amplification as defined by the American Society of Clinical Oncology and College of American Pathologists. In conclusion, the developed assay showed good analytical performance and a high agreement with immunohistochemistry and fluorescence in situ hybridization data. This study demonstrated that selected reaction monitoring allows to accurately quantify protein expression in formalin-fixed paraffin-embedded tissues and represents therefore a powerful approach for biomarker discovery studies. The untargeted mass spectrometry data is available via ProteomeXchange whereas the quantification data by selected reaction monitoring is available on the Panorama Public website.
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Affiliation(s)
- Carine Steiner
- From the ‡Division of Laboratory Medicine, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, CH-1211 Geneva, Switzerland; §Translational Technologies and Bioinformatics, Pharmaceutical Sciences, Roche Pharma Research & Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche AG, Grenzacherstrasse 124, CH-4070 Basel, Switzerland;
| | - Jean-Christophe Tille
- ¶Division of Clinical Pathology, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, CH-1211 Geneva, Switzerland
| | - Jens Lamerz
- §Translational Technologies and Bioinformatics, Pharmaceutical Sciences, Roche Pharma Research & Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche AG, Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Sabine Kux van Geijtenbeek
- §Translational Technologies and Bioinformatics, Pharmaceutical Sciences, Roche Pharma Research & Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche AG, Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Thomas A McKee
- ¶Division of Clinical Pathology, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, CH-1211 Geneva, Switzerland
| | - Miro Venturi
- ‖Oncology Division, Roche Pharma Research & Early Development (pRED), Roche Innovation Center Penzberg, Roche Diagnostics GmbH, Nonnenwald 2, D-82377 Penzberg, Germany
| | - Laura Rubbia-Brandt
- ¶Division of Clinical Pathology, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, CH-1211 Geneva, Switzerland
| | - Denis Hochstrasser
- From the ‡Division of Laboratory Medicine, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, CH-1211 Geneva, Switzerland
| | - Paul Cutler
- §Translational Technologies and Bioinformatics, Pharmaceutical Sciences, Roche Pharma Research & Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche AG, Grenzacherstrasse 124, CH-4070 Basel, Switzerland
| | - Pierre Lescuyer
- From the ‡Division of Laboratory Medicine, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, CH-1211 Geneva, Switzerland
| | - Axel Ducret
- §Translational Technologies and Bioinformatics, Pharmaceutical Sciences, Roche Pharma Research & Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche AG, Grenzacherstrasse 124, CH-4070 Basel, Switzerland
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17
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Kutkut I, Meens MJ, McKee TA, Bochaton-Piallat ML, Kwak BR. Lymphatic vessels: an emerging actor in atherosclerotic plaque development. Eur J Clin Invest 2015; 45:100-8. [PMID: 25388153 DOI: 10.1111/eci.12372] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 11/08/2014] [Indexed: 12/15/2022]
Abstract
BACKGROUND Atherosclerosis is a chronic inflammatory disease of large- to medium-sized arteries and is the main underlying cause of death worldwide. The lymphatic vasculature is critical for processes that are intimately linked to atherogenesis such as the immune response and cholesterol metabolism. However, whether lymphatic vessels truly contribute to the pathogenesis of atherosclerosis is less clear despite increasing research efforts in this field. DESIGN PubMed and Ovid MEDLINE databases were searched. In addition, key review articles were screened for relevant original publications. RESULTS Current knowledge about lymphatic vessels in the arterial wall came from studies that examined the presence and location of such vessels in human atherosclerotic plaque specimens, as well as in a variety of arteries in animal models for atherosclerosis (e.g. rabbits, dogs, rats and mice). Generally, three experimental approaches have been used to investigate the functional role of plaque-associated lymphatic vessels; experimental lymphostasis was used to investigate lymphatic drainage of the arterial wall, and more recently, studies with genetic interventions and/or surgical transplantation have been performed. CONCLUSIONS Lymphatic vessels seem to be mostly present in the adventitial layer of the arterial walls of animals and humans. They are involved in reverse cholesterol transport from atherosclerotic lesions, and arteries with a dense lymphatic network seem naturally protected against atherosclerosis. Lymphangiogenesis is a process that is an important part of the inflammatory loop in atherosclerosis. However, how augmenting or impeding the distribution of lymphatic vessels impacts disease progression remains to be investigated in future studies.
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Affiliation(s)
- Issa Kutkut
- Department of Pathology and Immunology, University of Geneva and Geneva University Hospitals, Geneva, Switzerland; Department of Medical Specializations - Cardiology, University of Geneva and Geneva University Hospitals, Geneva, Switzerland
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18
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Steiner C, Ducret A, Tille JC, Thomas M, McKee TA, Rubbia-Brandt L, Scherl A, Lescuyer P, Cutler P. Applications of mass spectrometry for quantitative protein analysis in formalin-fixed paraffin-embedded tissues. Proteomics 2014; 14:441-51. [PMID: 24339433 PMCID: PMC4265304 DOI: 10.1002/pmic.201300311] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 11/04/2013] [Accepted: 11/11/2013] [Indexed: 12/12/2022]
Abstract
Proteomic analysis of tissues has advanced in recent years as instruments and methodologies have evolved. The ability to retrieve peptides from formalin-fixed paraffin-embedded tissues followed by shotgun or targeted proteomic analysis is offering new opportunities in biomedical research. In particular, access to large collections of clinically annotated samples should enable the detailed analysis of pathologically relevant tissues in a manner previously considered unfeasible. In this paper, we review the current status of proteomic analysis of formalin-fixed paraffin-embedded tissues with a particular focus on targeted approaches and the potential for this technique to be used in clinical research and clinical diagnosis. We also discuss the limitations and perspectives of the technique, particularly with regard to application in clinical diagnosis and drug discovery.
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Affiliation(s)
- Carine Steiner
- Division of Laboratory Medicine, Geneva University Hospital, Geneva, Switzerland; Human Protein Sciences Department, University of Geneva, Geneva, Switzerland; Translational Technologies and Bioinformatics, Pharma Research and Early Development, F. Hoffmann-La Roche AG, Basel, Switzerland
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19
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Pusztaszeri MP, Sadow PM, Ushiku A, Bordignon P, McKee TA, Faquin WC. MYB immunostaining is a useful ancillary test for distinguishing adenoid cystic carcinoma from pleomorphic adenoma in fine-needle aspiration biopsy specimens. Cancer Cytopathol 2013; 122:257-65. [DOI: 10.1002/cncy.21381] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Revised: 10/28/2013] [Accepted: 11/01/2013] [Indexed: 11/07/2022]
Affiliation(s)
| | - Peter M. Sadow
- Department of Pathology; Massachusetts General Hospital; Boston Massachusetts
- Harvard Medical School; Boston Massachusetts
| | - Aya Ushiku
- Department of Pathology; Massachusetts General Hospital; Boston Massachusetts
| | | | - Thomas A. McKee
- Department of Pathology; Geneva University Hospital; Geneva Switzerland
| | - William C. Faquin
- Department of Pathology; Massachusetts General Hospital; Boston Massachusetts
- Harvard Medical School; Boston Massachusetts
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20
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Sobo K, Rubbia-Brandt L, Brown TDK, Stuart AD, McKee TA. Decay-accelerating factor binding determines the entry route of echovirus 11 in polarized epithelial cells. J Virol 2011; 85:12376-86. [PMID: 21917947 PMCID: PMC3209408 DOI: 10.1128/jvi.00016-11] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 09/04/2011] [Indexed: 01/21/2023] Open
Abstract
The interaction between echovirus 11 strain 207 (EV11-207) and decay-accelerating factor (DAF or CD55) at the apical surface of polarized Caco-2 cells results in rapid transport of the virus to tight junctions and in its subsequent uptake. A virus mutant (EV11-207R) which differs at 6 amino acids and whose affinity for DAF is apparently significantly lower remains at the apical surface, from where its uptake occurs. Binding of EV11-207 to DAF and its transport to tight junctions result in a loss of function of the junctions. In contrast, the mutant virus EV11-207R is not transferred to tight junctions, nor does it impair the integrity of these junctions. Cholesterol depletion from the apical membrane leads to DAF aggregation and, presumably, internalization and inhibits infection by EV11-207. However, infection by EV11-207R is significantly less sensitive to cholesterol depletion than infection by EV11-207, confirming the DAF requirement for EV11-207, but not EV11-207R, to infect cells. These data strongly indicate that in the case of infection of polarized epithelial cells by echovirus 11, DAF binding appears be a key determinant in the choice of entry pathway, at least in cell culture.
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Affiliation(s)
- Komla Sobo
- Department of Clinical Pathology, University of Geneva, 1 Rue Michel Servet, 1211 Geneva 4, Switzerland.
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21
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Sobo K, Stuart AD, Rubbia-Brandt L, Brown TDK, McKee TA. Echovirus 11 infection induces dramatic changes in the actin cytoskeleton of polarized Caco-2 cells. J Gen Virol 2011; 93:475-487. [PMID: 22090210 DOI: 10.1099/vir.0.037697-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Binding of echovirus 11 strain 207 (EV11-207) to Caco-2 monolayers results in rapid transfer of the virus to tight junctions prior to uptake. Using a confocal microscopy based-method, this study quantified the spatiotemporal distribution of actin during the time course of infection by EV11-207 in Caco-2 polarized cells. It was found that binding of EV11-207 to the apical surface resulted in rapid rearrangement of the actin cytoskeleton, concomitant with transport of the virus particles to tight junctions. By interfering with the actin network dynamics, the virus remained trapped at the cell surface, leading to abortion of infection. In addition, it was observed that at 4 h post-infection, concomitant with the detection of virus replication, actin filament was depolymerized and degraded. Finally, it was shown that the mechanisms leading to loss of actin were independent of viral genome synthesis, indicating a potential role for the viral protein synthesis seen in late infection. These data confirmed a previous study on the requirement for an intact actin cytoskeleton for EV11-207 to infect cells and reinforce the notion of actin cytoskeleton subversion by picornaviruses during infection in polarized epithelial cells.
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Affiliation(s)
- Komla Sobo
- Division of Virology, Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK.,Cell Biology Unit, MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London WC1E 6BT, UK.,Department of Clinical Pathology, University of Geneva, 1 Rue Michel Servet, 1211 Geneva 4, Switzerland
| | - Amanda D Stuart
- Division of Virology, Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK
| | - Laura Rubbia-Brandt
- Department of Clinical Pathology, University of Geneva, 1 Rue Michel Servet, 1211 Geneva 4, Switzerland
| | - T David K Brown
- Division of Virology, Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK
| | - Thomas A McKee
- Department of Clinical Pathology, University of Geneva, 1 Rue Michel Servet, 1211 Geneva 4, Switzerland
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22
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Tille JC, Pelte MF, Schwartz J, Dietrich PY, McKee TA. Plasmablastic lymphoma clinically presenting in the urinary tract. Ann Diagn Pathol 2011; 16:219-23. [PMID: 21531157 DOI: 10.1016/j.anndiagpath.2011.02.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
Abstract
Plasmablastic lymphoma is a high-grade B-cell lymphoma that poses major diagnostic problems and carries an extremely poor prognosis. This tumor was first described in the oral cavity of HIV+ patients but has since been identified in other sites and in seronegative patients. We describe 2 cases of plasmablastic lymphoma of the urinary tract that both presented with hydronephrosis. One occurred in an HIV+ patient and harbored a MYC translocation; the other, in an HIV- patient with no translocation detected.
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Affiliation(s)
- Jean-Christophe Tille
- Department of Genetics and Laboratory Medicine, Division of Clinical Pathology, University Hospital of Geneva, 1211 Geneva 4, Switzerland.
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23
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Benusiglio PR, McKee TA, Montet X, Dumonceau JM, Favet L, George AC, Dietrich PY. Gastrointestinal relapse of multiple myeloma and sustained response to lenalidomide: a case report. J Med Case Rep 2011; 5:110. [PMID: 21418590 PMCID: PMC3076251 DOI: 10.1186/1752-1947-5-110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Accepted: 03/19/2011] [Indexed: 11/10/2022] Open
Abstract
Introduction Gastrointestinal relapse in patients with multiple myeloma is very rare and, when reported, always associated with a poor prognosis. Case presentation We describe the case of a 71-year-old Caucasian man who presented with life-threatening hematemesis and melena due to a digestive relapse of his multiple myeloma. Despite the active hemorrhage, we initiated a third-line treatment with lenalidomide. The response was spectacular and long-lasting. Conclusions Clinicians must consider digestive tract involvement in myeloma patients presenting with a gastrointestinal hemorrhage. Furthermore, myeloma patients do benefit from novel oral drugs, even when they are critically ill.
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Affiliation(s)
- Patrick R Benusiglio
- Centre for Oncology, Geneva University Hospital, 4 rue Gabrielle Perret-Gentil, 1211 Geneva 14, Switzerland.
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24
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Rougemont AL, Makrythanasis P, Finci V, Billieux MH, Epiney M, McKee TA, Nizetic D, Fokstuen S. Myeloid proliferation without GATA1 mutations in a fetus with Down syndrome presenting in utero as a pericardial effusion. Pediatr Dev Pathol 2010; 13:423-6. [PMID: 20429643 DOI: 10.2350/09-11-0743-cr.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
An isolated pericardial effusion was observed during a routine prenatal ultrasound in a fetus of 30 and 3/7 weeks gestation. Amniocentesis was performed and revealed a trisomy 21. After prenatal counseling, the parents opted for termination of the pregnancy at 32 weeks. Postmortem examination confirmed the presence of a pericardial effusion, without structural cardiac anomalies, and showed the development of ascites and subcutaneous edema. Histological examination showed an infiltrate of megakaryoblasts and irregular, dysplastic megakaryocytes confined to the epicardium, the pericardial lymph nodes, and the pancreas, consistent with a myeloid proliferation related to Down syndrome. Sequencing of exons 2 and 3 of the GATA1 gene from the umbilical cord blood and from megakaryoblast infiltrate showed no mutation. A high incidence of chromosomal abnormalities, in particular trisomy 21, has been described in fetuses with pericardial effusion. However, myeloid proliferation related to Down syndrome without GATA1 mutations is extremely rare. To our knowledge, only one such case has been reported to date. We present here a 2nd case, which further supports the hypothesis that hyperproliferation of megakaryocytes in a subset of Down syndrome patients may be initiated by events other than GATA1 mutations.
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Affiliation(s)
- Anne-Laure Rougemont
- Division of Clinical Pathology, Geneva University Hospitals, 1211 Geneva, Switzerland.
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25
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Rougemont AL, Genevay M, McKee TA, Gremaud M, Mentha G, Rubbia-Brandt L. Extensive biliary intraepithelial neoplasia (BilIN) and multifocal early intrahepatic cholangiocarcinoma in non-biliary cirrhosis. Virchows Arch 2010; 456:711-7. [PMID: 20428886 DOI: 10.1007/s00428-010-0899-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Revised: 01/14/2010] [Accepted: 02/20/2010] [Indexed: 12/31/2022]
Abstract
Biliary intraepithelial neoplasia (BilIN), a preneoplastic condition that may precede invasive intrahepatic cholangiocarcinoma (ICC), has been compared to pancreatic intraepithelial neoplasia (PanIN), a precursor lesion of pancreatic carcinoma. Biliary tract carcinoma development and progression is associated with several gene alterations, but BilIN lesions have yet to be studied in detail by molecular techniques. We describe a case of extensive intrahepatic biliary dysplasia, with lesions ranging from BilIN-1 to BilIN-3 lesions, and multifocal microscopic ICC in hepatitis C virus (HCV)- and alcohol-related cirrhosis. The small ICC foci had remained undetected prior to transplantation. Fluorescence in situ hybridization (FISH) analysis was performed on three foci of BilIN-3 lesions and on three microinvasive ICC foci with a combination of three FISH probes directed against genes frequently altered in pancreatic and biliary tract carcinomas. FISH analysis revealed a CDKNA2 heterozygous deletion in one BilIN-3 focus, and in one non-contiguous ICC focus, although the deletion was just above the chosen threshold. No deletions were detected in the genomic regions encoding TP53 and SMAD4. This report documents for the first time the development of multifocal ICC in the setting of extensive biliary dysplasia in a patient with three risk factors, HCV infection, alcohol abuse, and cirrhosis, and suggests heterogeneous carcinogenesis in ICC and possible involvement of the CDKNA2 gene.
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Affiliation(s)
- Anne-Laure Rougemont
- Division of Clinical Pathology, Geneva University Hospitals, Rue Gabrielle-Perret-Gentil 4, 1211, Geneva 14, Switzerland.
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26
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Bongiovanni M, Triponez F, McKee TA, Kumar N, Matthes T, Meyer P. Fine-needle aspiration of the diffuse sclerosing variant of papillary thyroid carcinoma masked by florid lymphocytic thyroiditis; A potential pitfall: A case report and review of the literature. Diagn Cytopathol 2009; 37:671-5. [DOI: 10.1002/dc.21091] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Loubeyre P, McKee TA, Copercini M, Rosset A, Dietrich PY. Diagnostic precision of image-guided multisampling core needle biopsy of suspected lymphomas in a primary care hospital. Br J Cancer 2009; 100:1771-6. [PMID: 19401685 PMCID: PMC2695682 DOI: 10.1038/sj.bjc.6605059] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
We evaluated the diagnostic quality of image-guided multisampling core needle biopsy (CNB) in patients investigated for suspected lymphoma in a primary care hospital. A total of 112 patients were consecutively assessed during a 3-year period. There were 80 lymphoid site biopsies and 32 non-lymphoid site biopsies. Eight to nine cores were obtained from different parts of the biopsy site. Two cores were systematically frozen, allowing for further morphological, immunochemistry and molecular studies. The diagnostic yield of CNB for malignancy was 100%. Only 47% (41/87) of patients with initial suspicion of lymphoma were finally diagnosed with Lymphoma. The diagnostic yield of CNB for lymphoma typing was 98% (62/63), according to the WHO classification. The diagnostic yield of CNB for complete lymphoma subtyping/grading was 86% (54/63). The diagnostic yield of CNB for a definite diagnosis of benignity was only 47% (8/17). In a primary care setting, multisampling CNB is a minimally invasive, and very accurate procedure for confirming malignancy in patients with suspected lymphoma, presenting with superficial/deep-seated, lymphoid/non-lymphoid site targets. With a very high diagnostic yield for lymphoma typing and a high diagnostic yield for complete lymphoma subtyping/grading a therapeutic decision can be taken in most patients.
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Affiliation(s)
- P Loubeyre
- Division of Radiology, Department of Imaging and Medical Informatics, Geneva University Hospitals, Switzerland.
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28
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Grad I, McKee TA, Ludwig SM, Hoyle GW, Ruiz P, Wurst W, Floss T, Miller CA, Picard D. The Hsp90 cochaperone p23 is essential for perinatal survival. Mol Cell Biol 2006; 26:8976-83. [PMID: 17000766 PMCID: PMC1636834 DOI: 10.1128/mcb.00734-06] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The functions of molecular chaperones have been extensively investigated biochemically in vitro and genetically in bacteria and yeast. We have embarked on a functional genomic analysis of the Hsp90 chaperone machine in the mouse by disrupting the p23 gene using a gene trap approach. p23 is an Hsp90 cochaperone that is thought to stabilize Hsp90-substrate complexes and, independently, to act as the cytosolic prostaglandin E2 synthase. Gene deletions in budding and fission yeasts and knock-down experiments with the worm have not revealed any clear in vivo requirements for p23. We find that p23 is not essential for overall prenatal development and morphogenesis of the mouse, which parallels the observation that it is dispensable for proliferation in yeast. In contrast, p23 is absolutely necessary for perinatal survival. Apart from an incompletely formed skin barrier, the lungs of p23 null embryos display underdeveloped airspaces and substantially reduced expression of surfactant genes. Correlating with the known function of glucocorticoids in promoting lung maturation and the role of p23 in the assembly of a hormone-responsive glucocorticoid receptor-Hsp90 complex, p23 null fibroblast cells have a defective glucocorticoid response. Thus, p23 contributes a nonredundant, temporally restricted, and tissue-specific function during mouse development.
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Affiliation(s)
- Iwona Grad
- Département de Biologie Cellulaire, Université de Genève, Sciences III, 1211 Genève 4, Switzerland.
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McKee TA. [Molecular pathology--an overview]. Rev Med Suisse 2005; 1:2786-8, 2790. [PMID: 16396367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Does the advent of molecular pathology toll a death knell for the traditional world of pathology? Or will it become the next tool box allowing the pathologist to play an ever more significant role in patient care. This article is a brief overview of this large and rapidly changing field. It touches on several of the key techniques in use today as well as providing examples highlighting the role of molecular pathology in pathologists' daily practice and of its potential roles in the future.
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Pan Y, Krueger T, Tran N, Yan H, Ris HB, McKee TA. Evaluation of tumour vascularisation in two rat sarcoma models for studying isolated lung perfusion. Injection route determines the origin of tumour vessels. Eur Surg Res 2005; 37:92-9. [PMID: 15905614 DOI: 10.1159/000084539] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2004] [Accepted: 10/01/2004] [Indexed: 11/19/2022]
Abstract
Isolated cytostatic lung perfusion (ILP) is an attractive technique allowing delivery of a high-dose of cytostatic agents to the lungs while limiting systemic toxicity. In developing a rat model of ILP, we have analysed the effect of the route of tumour cell injection on the source of tumour vessels. Pulmonary sarcomas were established by injecting a sarcoma cell suspension either by the intravenous (i.v.) route or directly into the lung parenchyma. Ink perfusion through either pulmonary artery (PA) or bronchial arteries (BA) was performed and the characteristics of the tumour deposits defined. i.v. and direct injection methods induced pulmonary sarcoma nodules, with similar histological features. The intraparenchymal injection of tumour cells resulted in more reliable and reproducible tumour growth and was associated with a longer survival of the animals. i.v. injected tumours developed a PA-derived vascular tree whereas directly injected tumours developed a BA-derived vasculature.
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Affiliation(s)
- Youmin Pan
- Division of Thoracic Surgery, University Hospital of Lausanne, Lausanne, Switzerland
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31
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Kamel EM, McKee TA, Calcagni ML, Schmidt S, Markl S, Castaldo S, Delaloye AB. Occult lung infarction may induce false interpretation of 18F-FDG PET in primary staging of pulmonary malignancies. Eur J Nucl Med Mol Imaging 2005; 32:641-6. [PMID: 15726357 DOI: 10.1007/s00259-004-1718-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2004] [Accepted: 10/14/2004] [Indexed: 10/25/2022]
Abstract
PURPOSE The aim of the present report is to describe abnormal (18)F-fluorodeoxyglucose (FDG) accumulation patterns in the pleura and lung parenchyma in a group of lung cancer patients in whom lung infarction was present at the time of positron emission tomography (PET). METHODS Between November 2002 and December 2003, a total of 145 patients (102 males, 43 females; age range 38-85 years) were subjected to whole-body FDG PET for initial staging (n=117) or restaging (n=11) of lung cancer or for evaluation of solitary pulmonary nodules (n=17). Of these patients, 24 displayed abnormal FDG accumulation in the lung parenchyma that was not consistent with the primary lesion under investigation (ipsilateral n=12, contralateral n=9 or bilateral n=3). Without correlative imaging, this additional FDG uptake would have been considered indeterminate in differential diagnosis. RESULTS Of the 24 patients who were identified as having such lesions, six harboured secondary tumour nodules diagnosed as metastases, while in three the diagnosis of a synchronous second primary lung tumour was established. Additionally, nine patients were identified as having post-stenotic pneumonia and/or atelectasis (n=6) or granulomatous lung disease (n=3). In the remaining six (4% of all patients), a diagnosis of recent pulmonary embolism that topographically matched the additional FDG accumulation (SUV(max) range 1.4-8.6, mean 3.9) was made. Four of these six patients were known to have pulmonary embolism, and hence false positive interpretation was avoided by correlating the PET findings with those of the pre-existing diagnostic work-up. The remaining two patients were harbouring small occult infarctions that mimicked satellite nodules in the lung periphery. Based on histopathological results, the abnormal FDG accumulation in these two patients was attributed to the inflammatory reaction and tissue repair associated with the pathological cascade of pulmonary embolism. CONCLUSION In patients with pulmonary malignancies, synchronous lung infarction may induce pathological FDG accumulation that can mimic active tumour manifestations. Identifying this potential pitfall may allow avoidance of false positive FDG PET interpretation.
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Affiliation(s)
- Ehab M Kamel
- Division of Nuclear Medicine, Centre Hospitalier Universitaire Vaudois (CHUV), CH-1011, Lausanne, Switzerland.
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Abstract
The glycosylphosphatidylinositol (GPI)-anchored complement regulatory protein decay-accelerating factor (DAF) is used by a number of enteroviruses as a receptor during infection. DAF and other GPI-anchored proteins can be found in cholesterol-rich ordered domains within the plasma membrane that are known as "lipid rafts." We have shown, by using drugs to specifically inhibit various endocytosis routes, that infection by a DAF-using strain of echovirus 11 (EV11) is dependent upon cholesterol and an intact cytoskeleton, whereas a non-DAF-using mutant derived from it was unaffected by these drugs. Using RNA transfection and virus-binding assays, we have shown that this requirement for cholesterol, the actin cytoskeleton, and the microtubule network occurs postbinding of the virus but prior to uncoating of the RNA, indicating a role during virus entry. Confocal microscopy of virus infection supported the role of cholesterol and the cytoskeleton during entry. In addition, [(35)S]methionine-labeled DAF-using EV11, but not the non-DAF-using EV11, could be copurified with lipid raft components during infection after Triton X-100 extraction. These data indicate that DAF usage by EV11 enables the virus to associate with lipid rafts and enter cells through this novel route.
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Affiliation(s)
- Amanda D Stuart
- Division of Virology, Department of Pathology, University of Cambridge, CB2 1QP Cambridge, United Kingdom.
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Stuart AD, McKee TA, Williams PA, Harley C, Shen S, Stuart DI, Brown TDK, Lea SM. Determination of the structure of a decay accelerating factor-binding clinical isolate of echovirus 11 allows mapping of mutants with altered receptor requirements for infection. J Virol 2002; 76:7694-704. [PMID: 12097583 PMCID: PMC136386 DOI: 10.1128/jvi.76.15.7694-7704.2002] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We have used X-ray crystallography to determine the structure of a decay accelerating factor (DAF)-binding, clinic-derived isolate of echovirus 11 (EV11-207). The structures of the capsid proteins closely resemble those of capsid proteins of other picornaviruses. The structure allows us to interpret a series of amino acid changes produced by passaging EV11-207 in different cell lines as highlighting the locations of multiple receptor-binding sites on the virion surface. We suggest that a DAF-binding site is located at the fivefold axes of the virion, while the binding site for a distinct but as yet unidentified receptor is located within the canyon surrounding the virion fivefold axes.
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Affiliation(s)
- Amanda D Stuart
- Division of Virology, Department of Pathology, University of Cambridge, Cambridge CB2 1QP, United Kingdom
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Shen S, McKee TA, Wang ZD, Desselberger U, Liu DX. Sequence analysis and in vitro expression of genes 6 and 11 of an ovine group B rotavirus isolate, KB63: evidence for a non-defective, C-terminally truncated NSP1 and a phosphorylated NSP5. J Gen Virol 1999; 80 ( Pt 8):2077-2085. [PMID: 10466806 DOI: 10.1099/0022-1317-80-8-2077] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
An ovine group B rotavirus (GBR) isolate, KB63, was isolated from faeces of a young goat with diarrhoea in Xinjiang, People's Republic of China. Sequence determination and comparison of genes 6 and 11 with the corresponding sequences of GBR strains ADRV and IDIR showed that they were the cognate genes encoding NSP1 and NSP5, respectively. While the overall identities of nucleotide sequences between these two genes and the corresponding genes of strains ADRV and IDIR were in the range 52.6-57.2%, the identities of deduced amino acid sequences were only 34.9-46.3%. These results demonstrate that the substantial diversity of NSP1 observed among group A rotaviruses (GAR) also exists within GBRs and that a high degree of diversity also exists among NSP5 of GBRs, in contrast to GAR NSP5. The NSP1 gene of KB63 contains three ORFs, whereas the NSP1 genes of other GBR strains contain only two. ORFs 2 and 3 of the KB63 gene may be derived from a single ORF corresponding to ORF2 of other GBR strains by the usage of a stop codon created by an upstream single base deletion and single point mutations. In vitro expression studies showed that ORFs 1 and 2, but not 3, of gene 6 can be translated, suggesting that ORF2 may encode a C-terminally truncated, potentially functional product. It may play a role, together with the product of ORF1, in virus replication, as the virus can be passaged further in kids. Similarly, gene 11 can be translated in vitro. Like its counterpart in GARs, the protein encoded by gene 11 was shown to be phosphorylated in vitro.
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Affiliation(s)
- S Shen
- Clinical Microbiology and Public Health Laboratory and Division of Virology, Department of Pathology, University of Cambridge, Cambridge CB2 2QW, UK2
- Institute of Molecular Agrobiology, 1 Research Link, The National University of Singapore, Singapore 1176041
| | - T A McKee
- Clinical Microbiology and Public Health Laboratory and Division of Virology, Department of Pathology, University of Cambridge, Cambridge CB2 2QW, UK2
| | - Z D Wang
- Xinjiang August 1st Agricultural University, Xinjiang, People's Republic of China3
| | - U Desselberger
- Clinical Microbiology and Public Health Laboratory and Division of Virology, Department of Pathology, University of Cambridge, Cambridge CB2 2QW, UK2
| | - D X Liu
- Institute of Molecular Agrobiology, 1 Research Link, The National University of Singapore, Singapore 1176041
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Abstract
Antigen capture polymerase chain reaction (AC-PCR) is a technique that combines the advantages of PCR with those of antibody mediated methods, to detect and type human enteroviruses. Virus particles are captured by specific antisera and RNA is released by heat denaturation to generate the substrate for reverse transcription and PCR. Use of this technique results in purification of human enteroviruses from tissue culture and 10% faecal samples in a serotype-specific manner allowing both rapid detection and a direct correlation between serological and genetic typing methods. The sensitivity of AC-PCR was comparable with that of PCR protocols employing a conventional organic solvent based extraction procedure.
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Affiliation(s)
- S Shen
- Department of Pathology, University of Cambridge, UK
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Abstract
OBJECTIVE To identify risks of hepatitis C virus transmission by semen from infected donors. DESIGN Case report. SETTING Assisted fertility clinic. PATIENTS Hepatitis C virus-infected semen donor and recipients of his donations. INTERVENTION Testing for hepatitis C virus by serology and polymerase chain reaction. MAIN OUTCOME MEASURES Detection of hepatitis C virus antibodies and viral RNA. RESULTS Hepatitis C virus RNA was detected in the semen donation before but not after purification; none of the recipients of the donors samples were found to have antibodies to hepatitis C virus. CONCLUSIONS Hepatitis C virus RNA can be detected in semen donations from infected donors; purification of donations before insemination significantly reduces the amount of viral RNA in the semen pellet.
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Affiliation(s)
- T A McKee
- Department of Pathology, Cambridge University, United Kingdom
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Majid A, Holmes R, Desselberger U, Simmonds P, McKee TA. Molecular epidemiology of hepatitis C virus infection amongst intravenous drug users in rural communities. J Med Virol 1995; 46:48-51. [PMID: 7542693 DOI: 10.1002/jmv.1890460111] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The prevalence of hepatitis C virus (HCV) infection amongst a group of intravenous drug users (IVDUs) resident in West Suffolk (East Anglia, England) was investigated and compared with the prevalence of infection with hepatitis B virus (HBV) and human immunodeficiency virus (HIV). In addition, both the level of HCV persistence, as defined by detection of viral RNA, and the HCV genotypes present in this population were determined. It was found that HCV antibodies were present in 59% of those tested; by comparison 22% had antibodies to HBV and 1% antibodies to HIV. HCV RNA was found in 44% of those with HCV antibody. HCV genotype 1 was the most prevalent within this population although both genotypes 2 and 3 were also represented.
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Affiliation(s)
- A Majid
- Clinical Microbiology and Public Health Laboratory, Addenbrooke's Hospital, Cambridge, United Kingdom
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Gray JJ, Wreghitt TG, McKee TA, McIntyre P, Roth CE, Smith DJ, Sutehall G, Higgins G, Geraghty R, Whetstone R. Internal quality assurance in a clinical virology laboratory. II. Internal quality control. J Clin Pathol 1995; 48:198-202. [PMID: 7730475 PMCID: PMC502436 DOI: 10.1136/jcp.48.3.198] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
AIMS In April 1991 additional quality control procedures were introduced into the virology section of the Clinical Microbiology and Public Health Laboratory, Cambridge. Internal quality control (IQC) samples were gradually included in the serological assays performed in the laboratory and supplemented kit controls and standard sera. METHODS From April 1991 to December 1993, 2421 IQC procedures were carried out with reference sera. RESULTS The IQC samples were evaluated according to the Westgard rules. Violations were recorded in 60 of 1808 (3.3%) controls and were highest in the IQC samples of complement fixation tests (25/312 (8%) of controls submitted for complement fixation tests). CONCLUSIONS The inclusion of IQC samples in the serological assays performed in the laboratory has highlighted batch to batch variation in commercial assays. The setting of acceptable limits for the IQC samples has increased confidence in the validity of assay results.
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Affiliation(s)
- J J Gray
- Clinical Microbiology and Public Health Laboratory, Addenbrooke's Hospital, Cambridge
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39
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Gray JJ, Wreghitt TG, McKee TA, McIntyre P, Roth CE, Smith DJ, Sutehall G, Higgins G, Geraghty R, Whetstone R. Internal quality assurance in a clinical virology laboratory. I. Internal quality assessment. J Clin Pathol 1995; 48:168-73. [PMID: 7745118 PMCID: PMC502399 DOI: 10.1136/jcp.48.2.168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
AIMS In April 1991 an internal quality assessment scheme (IQAS) was introduced into the virology section of the Clinical Microbiology and Public Health Laboratory, Cambridge. The IQAS was established to identify recurring technical and procedural problems, to check the adequacy of current techniques, and to calculate the frequency of errors. METHODS Between April 1991 and December 1993, 715 anonymous clinical serum samples were submitted to the laboratory to test 3245 individual procedures of diagnostic viral serology. RESULTS A total of 485 (14.9%) procedural and 61 (1.9%) technical discrepancies were observed, the technical discrepancies mainly being recorded in complement fixation tests. Twenty two (0.7% of total procedures) of the technical discrepancies were diagnostically significant. CONCLUSIONS Evaluation criteria developed with the introduction of IQAS to viral serology, and technical and procedural discrepancies are assessed. As yet, IQAS has not been introduced to other sections of the diagnostic virology laboratory (virus isolation, electron microscopy, immunofluorescence, and enzyme linked immunosorbent assays for viral and chlamydial antigens).
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Affiliation(s)
- J J Gray
- Clinical Microbiology and Public Health Laboratory, Addenbrooke's Hospital, Cambridge
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40
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Lowenstein PR, Morrison EE, Bain D, Hodge P, Preston CM, Clissold P, Stow ND, McKee TA, Castro MG. Use of recombinant vectors derived from herpes simplex virus 1 mutant tsK for short-term expression of transgenes encoding cytoplasmic and membrane anchored proteins in postmitotic polarized cortical neurons and glial cells in vitro. Neuroscience 1994; 60:1059-77. [PMID: 7936206 DOI: 10.1016/0306-4522(94)90283-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We constructed three recombinant vectors derived from the herpes simplex virus type 1 mutant tsK, each of which contained a different transgene under the control of the herpes simplex virus type 1 immediate early 3 promoter inserted into the thymidine kinase locus: the prokaryotic enzymes beta-galactosidase and chloramphenicol acetyl transferase, and a fusion gene consisting of human tissue inhibitor of metalloproteinases linked to the last exon of Thy-1, which encodes for a glycosyl-phosphatidyl-inositol membrane anchor. Infection of postmitotic neocortical and hippocampal neurons in low-density primary cultures with these vectors, achieved reliable expression of all three foreign gene products in various neocortical cell types, e.g. pyramidal neurons, non-pyramidal neurons, and glial cells. The percentage of neurons expressing transgenes ranged from 1 to 46% depending on the multiplicity of infection (highest assayed = 5); the percentage of glial cells expressing transgenes ranged from 0.5 to 98% (highest multiplicity assayed = 3.4). Expression of transgenes could be detected for up to three days in approximately 20% of neurons infected at a multiplicity of infection of 1. Infection of neurons with tk K-derived recombinant vectors inhibited their protein synthesis by 40-50% at a multiplicity of infection of 10, but no effect was observed at a multiplicity of infection of 1. Infection of glial cells with the same vectors at a multiplicity of infection of 1 inhibited protein synthesis by more than 90%. Analysis of neuronal viability at different times post-infection indicated that more than 98% of neurons expressing transgenes 48 h post-infection were viable. Thus, low-density neuronal cultures can be used to assess the efficiency of herpes simplex virus type 1-derived gene transfer vectors and transgene expression in developing cortical postmitotic cells, before and after they establish polarity. In addition, we show that two cytoplasmic enzymes, beta-galactosidase and chloramphenicol acetyl transferase, are able to diffuse freely in the cytoplasm reaching even growth cones in young neurons, while the chimeric protein tissue inhibitor of metalloproteinases/Thy-1 is correctly targeted to the plasma membrane via a glycosyl-phosphatidylinositol anchor. This model system should be useful for investigation of cellular and molecular aspects of the development and establishment of neuronal polarity, as well as for analysis of signals involved in protein targeting in postmitotic neurons.
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Affiliation(s)
- P R Lowenstein
- Department of Physiology, University of Wales College of Cardiff, U.K
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Abstract
We have previously demonstrated that induction of antiviral cytotoxic T lymphocytes (CTL), in the absence of antiviral antibodies, can confer protection against a lethal-dose virus challenge. Here we extend those findings as follows. First, three discrete viral CTL epitopes expressed from minigenes encoding peptides as short as 12 amino acids can be recognized when expressed from recombinant vaccinia virus; second, concentrating on two of the three epitopes, we show that these vaccinia virus recombinants can confer protection in a major histocompatibility complex (MHC)-restricted manner; third, the minigenes can be fused to generate a "string of beads," and the close proximity of the two epitopes within one oligopeptide does not disrupt recognition of either epitope; fourth, this string-of-beads vaccine, in contrast to the single epitope vaccines, can protect on both MHC backgrounds; and, fifth, CTL to different epitopes may act synergistically, as protection is improved when the vaccine contains more than one CTL epitope for a given MHC background.
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Affiliation(s)
- J L Whitton
- Department of Neuropharmacology, Scripps Research Institute, La Jolla California 92037
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Lewicki H, McKee TA, Tishon A, Salvato M, Whitton JL, Oldstone MB. Novel LCMV-specific H-2k restricted CTL clones recognize internal viral gene products and cause CNS disease. J Neuroimmunol 1992; 41:15-20. [PMID: 1281166 DOI: 10.1016/0165-5728(92)90190-v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
H-2k (C3H/Hej) cytotoxic T lymphocytes (CTL) specific for lymphocytic choriomeningitis virus (LCMV) were cloned. Three clones recognizing internal viral antigens were studied. One such CTL clone recognized neither the glycoprotein nor nucleoprotein encoded by the viral short RNA segment, but reacted with a protein encoded by the long RNA segment, either the viral polymerase, or the Z protein. This one clone, in addition to primary CTL harvested from immunized C3H mice, failed to lyse target cells expressing the Z protein, suggesting recognition was to the viral polymerase. Two other clones recognized the viral nucleoprotein, amino acids 93-100, as determined by protein deletion and peptide mapping studies. When introduced directly into the central nervous systems of LCMV-infected histocompatible mice, all clones were active in vivo and capable of causing immunopathologically mediated death.
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Affiliation(s)
- H Lewicki
- Department of Neuropharmacology, Scripps Research Institute, La Jolla, CA 92037
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Abstract
Binding sites for cellular proteins in the promoter of the varicella-zoster virus (VZV) major immediate early (IE) gene were investigated. Protein binding was detected at sequence motifs possessing homology to the CCAAT element and an ATF/AP-1-like binding site, and recognition of the ATF/AP-1 site was apparently facilitated by occupation of the CCAAT site. Gene expression directed by the VZV major IE promoter was stimulated by the adenovirus 5, 289 amino acid EIA gene product. The implications of the results for VZV gene expression and replication are discussed.
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Abstract
Varicella-zoster (VZV) gene 62 encodes a protein with a predicted Mr of 140,000 (140K) which has considerable amino acid identity with the major immediate early (IE) protein Vmw175 (ICP4) of herpes simplex virus type I (HSV-1). Vmw175 is an essential virus polypeptide with a pivotal role in the activation of early and late viral gene expression and also in the repression of IE gene expression. The VZV 140K protein has been shown to function as a strong transcriptional activator in transfection assays and largely complements for the loss of Vmw175 function in HSV-1. We report the results of cotransfection experiments which demonstrate that the 140K protein strongly represses expression from its own promoter, that of gene 62, thus establishing further functional similarity between it and Vmw175. However, whereas Vmw175 can substitute for the 140K protein in repression of the gene 62 promoter, the 140K protein does not repress the HSV-1 IE3 promoter in the reciprocal experiment. The integrity of a domain of Vmw175 (designated region 2), previously shown to be crucial for repression of the HSV-1 IE3 promoter, is also required for repression of the gene 62 promoter. Moreover, a similar requirement for the highly similar region 2 of the 140K protein for repression is demonstrated, suggesting that VZV 140K protein and HSV-1 Vmw175 autoregulate IE gene expression by a related mechanism.
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Abstract
The cis-acting DNA sequences and trans-acting proteins that control the expression of the major immediate early (IE) gene of varicella-zoster virus (VZV) were investigated. The location of the IE mRNA 5' terminus was determined by primer extension and S1 nuclease analyses and the functional activities of DNA sequences upstream of this site were analysed by a transfection assay. The VZV IE promoter exhibited low activity in BHK and HeLa cells, but was transactivated by the herpes simplex virus type 1 (HSV-1) virion protein Vmw65. DNA sequences between positions -131 and +57 were responsible for promoter activity, whereas sequences between -410 and -131 mediated the response to Vmw65. Two short elements in the -410 to -131 region formed protein-DNA complexes with HeLa cell nuclear proteins and formed a ternary complex when Vmw65 was added. One of the elements, ATGTAAATGAAAT, possessed a strong similarity to the HSV-1 TAATGARAT. The VZV homologue of Vmw65, encoded by open reading frame (ORF) 10, failed to trans-activate expression from HSV-1 or VZV IE promoters and did not form a ternary complex with functional TAATGARAT elements and HeLa cell proteins. Therefore, stimulation of VZV IE transcription by Vmw65 can occur by a mechanism similar to that employed by HSV-1, but VZV ORF 10 does not function as a trans-activator of IE gene expression.
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Affiliation(s)
- T A McKee
- Medical Research Council Virology Unit, Glasgow, U.K
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Ace CI, McKee TA, Ryan JM, Cameron JM, Preston CM. Construction and characterization of a herpes simplex virus type 1 mutant unable to transinduce immediate-early gene expression. J Virol 1989; 63:2260-9. [PMID: 2539517 PMCID: PMC250644 DOI: 10.1128/jvi.63.5.2260-2269.1989] [Citation(s) in RCA: 183] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
A herpes simplex virus mutant, in1814, possessing a 12-base-pair insertion in the gene encoding the transinducing factor Vmw65 has been constructed. The insertion abolished the ability of Vmw65 to transinduce immediate-early (IE) gene expression and to form a protein-DNA complex with cell proteins and the IE-specific regulatory element TAATGAGAT. Accumulation of IE RNA 1 and 2 was reduced four- to fivefold in in1814-infected cells, but the level of IE RNA 4 was reduced only by twofold, and IE RNA 3 was unaffected. Mutant in1814 had a high particle/PFU ratio, but many of the particles, although unable to form plaques, were capable of normal participation in the early stages of infection at high multiplicity of infection. The defect of in1814 was overcome partially by transfection of a plasmid encoding the IE protein Vmw110 into cells prior to titration and by prior infection with ultraviolet light-inactivated herpes simplex virus. Mutant in1814 was essentially avirulent when injected into mice. The results demonstrate that transinduction of IE transcription by Vmw65 is important at low multiplicity of infection and in vivo but that at high multiplicity of infection the function is redundant.
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Affiliation(s)
- C I Ace
- Medical Research Council Virology Unit, Institute of Virology, Glasgow, Scotland
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Haig DM, McKee TA, Jarrett EE, Woodbury R, Miller HR. Generation of mucosal mast cells is stimulated in vitro by factors derived from T cells of helminth-infected rats. Nature 1982; 300:188-90. [PMID: 6982422 DOI: 10.1038/300188a0] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The connective tissue of rats, and several other species of mammals, contains two distinct types of mast cells that differ in morphology, histochemical staining properties and location1. One type, frequently called the normal connective tissue mast cell, can be obtained in nearly homogeneous preparation from a mixed cell population in the peritoneal cavity and forms the basis of our knowledge of mast cells. The other type is referred to as the mucosal mast cell because in normal rats it has been observed only in mucosal tissue. Infection with helminth parasites induces an exteNsive accumulation of mast cells and eosinophils in the tissues, and parasites of mucous surfaces, in particular, stimulate a rapid hyperplasia of mucosal mast cells. However, the origin of mucosal mast cells, and their relationship to the connective tissue mast cells is uncertain. We now slow that lymphocytes of helminth-infected rats, on in vitro stimulation with specific antigen, release factors causing pronounced mucosal mastocytosis in normal rat bone marrow cultures.
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