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Hofman P, Calabrese F, Kern I, Adam J, Alarcão A, Alborelli I, Anton NT, Arndt A, Avdalyan A, Barberis M, Bégueret H, Bisig B, Blons H, Boström P, Brcic L, Bubanovic G, Buisson A, Caliò A, Cannone M, Carvalho L, Caumont C, Cayre A, Chalabreysse L, Chenard MP, Conde E, Copin MC, Côté JF, D'Haene N, Dai HY, de Leval L, Delongova P, Denčić-Fekete M, Fabre A, Ferenc F, Forest F, de Fraipont F, Garcia-Martos M, Gauchotte G, Geraghty R, Guerin E, Guerrero D, Hernandez S, Hurník P, Jean-Jacques B, Kashofer K, Kazdal D, Lantuejoul S, Leonce C, Lupo A, Malapelle U, Matej R, Merlin JL, Mertz KD, Morel A, Mutka A, Normanno N, Ovidiu P, Panizo A, Papotti MG, Parobkova E, Pasello G, Pauwels P, Pelosi G, Penault-Llorca F, Picot T, Piton N, Pittaro A, Planchard G, Poté N, Radonic T, Rapa I, Rappa A, Roma C, Rot M, Sabourin JC, Salmon I, Prince SS, Scarpa A, Schuuring E, Serre I, Siozopoulou V, Sizaret D, Smojver-Ježek S, Solassol J, Steinestel K, Stojšić J, Syrykh C, Timofeev S, Troncone G, Uguen A, Valmary-Degano S, Vigier A, Volante M, Wahl SGF, Stenzinger A, Ilié M. Real-world EGFR testing practices for non-small-cell lung cancer by thoracic pathology laboratories across Europe. ESMO Open 2023; 8:101628. [PMID: 37713929 PMCID: PMC10594022 DOI: 10.1016/j.esmoop.2023.101628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/14/2023] [Accepted: 08/02/2023] [Indexed: 09/17/2023] Open
Abstract
BACKGROUND Testing for epidermal growth factor receptor (EGFR) mutations is an essential recommendation in guidelines for metastatic non-squamous non-small-cell lung cancer, and is considered mandatory in European countries. However, in practice, challenges are often faced when carrying out routine biomarker testing, including access to testing, inadequate tissue samples and long turnaround times (TATs). MATERIALS AND METHODS To evaluate the real-world EGFR testing practices of European pathology laboratories, an online survey was set up and validated by the Pulmonary Pathology Working Group of the European Society of Pathology and distributed to 64 expert testing laboratories. The retrospective survey focussed on laboratory organisation and daily EGFR testing practice of pathologists and molecular biologists between 2018 and 2021. RESULTS TATs varied greatly both between and within countries. These discrepancies may be partly due to reflex testing practices, as 20.8% of laboratories carried out EGFR testing only at the request of the clinician. Many laboratories across Europe still favour single-test sequencing as a primary method of EGFR mutation identification; 32.7% indicated that they only used targeted techniques and 45.1% used single-gene testing followed by next-generation sequencing (NGS), depending on the case. Reported testing rates were consistent over time with no significant decrease in the number of EGFR tests carried out in 2020, despite the increased pressure faced by testing facilities during the COVID-19 pandemic. ISO 15189 accreditation was reported by 42.0% of molecular biology laboratories for single-test sequencing, and by 42.3% for NGS. 92.5% of laboratories indicated they regularly participate in an external quality assessment scheme. CONCLUSIONS These results highlight the strong heterogeneity of EGFR testing that still occurs within thoracic pathology and molecular biology laboratories across Europe. Even among expert testing facilities there is variability in testing capabilities, TAT, reflex testing practice and laboratory accreditation, stressing the need to harmonise reimbursement technologies and decision-making algorithms in Europe.
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Affiliation(s)
- P Hofman
- Laboratory of Clinical and Experimental Pathology, FHU OncoAge, Biobank Côte d'Azur BB-0033-00025, Louis Pasteur Hospital, IRCAN, Université Côte d'Azur, Nice, France.
| | - F Calabrese
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - I Kern
- Department of Pathology, University Clinic Golnik, Golnik, Slovenia
| | - J Adam
- Department of Pathology, Groupe Hospitalier Paris Saint-Joseph, Paris, France
| | - A Alarcão
- IAP-PM, Institute of Anatomical and Molecular Pathology, Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
| | - I Alborelli
- Department of Pathology, Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - N T Anton
- Department of Genetics, University Hospital Bichat-Claude Bernard, Paris University, Paris, France
| | - A Arndt
- Institute of Pathology and Molecular Pathology, Bundeswehrkrankenhaus Ulm, Oberer Eselsberg 40, 89081 Ulm, Germany
| | - A Avdalyan
- Multidisciplinary Clinical Center "Kommunarka" of the Moscow Health Department, Moscow, Russia
| | - M Barberis
- Oncogenomics Unit, European Institute of Oncology (IEO), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Milan, Italy
| | - H Bégueret
- Department of Pathology, University Hospital of Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - B Bisig
- Institute of Pathology, Department of Laboratory Medicine and Pathology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - H Blons
- Pharmacogenomics and Molecular Oncology Unit, Biochemistry Department, Assistance Publique-Hopitaux de Paris, Hôpital Européen Georges Pompidou, Paris, France
| | - P Boström
- Department of Pathology, Turku University Hospital, Turku, Finland
| | - L Brcic
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
| | - G Bubanovic
- Laboratory for Molecular Pathology, Department of Pathology, University of Zagreb School of Medicine and University Hospital Centre Zagreb, Zagreb, Croatia
| | - A Buisson
- Department of Biopathology, Centre Léon Bérard, Lyon, France
| | - A Caliò
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, Verona, Italy
| | - M Cannone
- Inter-Hospital Pathology Division, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), MultiMedica, Milan, Italy
| | - L Carvalho
- IAP-PM, Institute of Anatomical and Molecular Pathology, Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal
| | - C Caumont
- Department of Tumor Biology, University Hospital of Bordeaux, Hospital Haut-Lévêque, Pessac, France
| | - A Cayre
- Department of Biopathology, Jean Perrin Centre, Clermont-Ferrand, France
| | - L Chalabreysse
- Department of Pathology, Groupement Hospitalier Est, Bron, France
| | - M P Chenard
- Department of Pathology, University Hospital of Strasbourg, 67098 Strasbourg, France
| | - E Conde
- Department of Pathology, 12 de Octubre University Hospital, Universidad Complutense de Madrid, Research Institute 12 de Octubre University Hospital (i+12), CIBERONC, Madrid, Spain
| | - M C Copin
- Department of Pathology, Université d'Angers, Centre Hospitalier Universitaire d'Angers, Angers, France
| | - J F Côté
- Department of Pathology, Institut Mutualiste Montsouris, Paris, France
| | - N D'Haene
- Department of Pathology, Erasme Hospital, HUB ULB, Brussels, Belgium
| | - H Y Dai
- Department of Pathology, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway
| | - L de Leval
- Institute of Pathology, Department of Laboratory Medicine and Pathology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - P Delongova
- Institute of Molecular and Clinical Pathology and Medical Genetics, Faculty of Medicine, University Hospital Ostrava, Ostrava, Czech Republic
| | | | - A Fabre
- Department of Histopathology, St. Vincent's University Hospital, University College Dublin School of Medicine, Dublin, Ireland
| | - F Ferenc
- Department of Pathology, University of Oradea, Oradea, Romania
| | - F Forest
- Department of Pathology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - F de Fraipont
- Medical Unit of Molecular Genetic (Hereditary Diseases and Oncology), Grenoble University Hospital, Grenoble, France
| | - M Garcia-Martos
- Department of Pathology, Gregorio Marañón General University Hospital, Madrid, Spain
| | - G Gauchotte
- Department of Biopathology, CHRU-ICL, CHRU Nancy, Vandoeuvre-lès-Nancy, France
| | - R Geraghty
- Department of Histopathology, St. Vincent's University Hospital, University College Dublin School of Medicine, Dublin, Ireland
| | - E Guerin
- Department of Molecular Cancer Genetics, Laboratory of Biochemistry and Molecular Biology, University Hospital of Strasbourg, Strasbourg, France
| | - D Guerrero
- Biomedical Research Centre, Navarra Health Service, Pamplona, Navarra, Spain
| | - S Hernandez
- Department of Pathology, 12 de Octubre University Hospital, Universidad Complutense de Madrid, Research Institute 12 de Octubre University Hospital (i+12), CIBERONC, Madrid, Spain
| | - P Hurník
- Institute of Molecular and Clinical Pathology and Medical Genetics, Faculty of Medicine, University Hospital Ostrava, Ostrava, Czech Republic
| | - B Jean-Jacques
- Department of Pathology, CHU de Caen Côte de Nacre, Caen, France
| | - K Kashofer
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
| | - D Kazdal
- Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany; Translational Lung Research Center Heidelberg (TLRC-H), member of the German Center for Lung Research (DZL), Heidelberg, Germany
| | - S Lantuejoul
- Department of Biopathology, Centre Leon Berard Unicancer and Pathology Research Platform, Cancer Research Center of Lyon (CRCL), Lyon, France
| | - C Leonce
- Department of Pathology, Groupement Hospitalier Est, Bron, France
| | - A Lupo
- Department of Pathology, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, Université de Paris, Paris, France
| | - U Malapelle
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - R Matej
- Department of Pathology and Molecular Medicine, Thomayer University Hospital, Prague, Czech Republic
| | - J L Merlin
- Department of Biopathology, Institut de Cancérologie de Lorraine, University of Lorraine, Vandoeuvre-Les-Nancy, France
| | - K D Mertz
- Institute of Pathology, Cantonal Hospital Baselland, Liestal, Switzerland
| | - A Morel
- Department of Innate Immunity and Immunotherapy, Institut de Cancérologie de l'Ouest - Centre Paul Papin, Angers, France
| | - A Mutka
- HUSLAB, Department of Pathology, Helsinki University Hospital, Helsinki, Finland
| | - N Normanno
- Cell Biology and Biotherapy Unit, INT-Fondazione Pascale, Via M. Semmola, Naples, Italy
| | - P Ovidiu
- Department of Pathology, University of Oradea, Oradea, Romania
| | - A Panizo
- Department of Pathology, Complejo Hospitalario de Navarra, Pamplona, Navarra, Spain
| | - M G Papotti
- Division of Pathology, University Hospital Città Della Salute, Turin, Italy
| | - E Parobkova
- Department of Pathology and Molecular Medicine, Thomayer University Hospital, Prague, Czech Republic
| | - G Pasello
- Division of Medical Oncology 2, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - P Pauwels
- Department of Pathology, University Hospital Antwerp and University of Antwerp, Antwerp, Belgium
| | - G Pelosi
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - F Penault-Llorca
- Department of Pathology, Clermont Auvergne University, "Molecular Imaging and Theranostic Strategies", Center Jean Perrin, Montalembert, Clermont-Ferrand, France
| | - T Picot
- Department of Pathology, University Hospital of Saint-Etienne, Saint-Etienne, France
| | - N Piton
- Department of Pathology, Rouen University Hospital, France and Normandie University, UNIROUEN, Inserm U1245, Rouen, France
| | - A Pittaro
- Division of Pathology, University Hospital Città Della Salute, Turin, Italy
| | - G Planchard
- Department of Pathology, CHU de Caen Côte de Nacre, Caen, France
| | - N Poté
- Department of Pathology, Hospital Bichat Bichat, Assistance Publique Hôpitaux de Paris; Université Paris Cité, Paris, France
| | - T Radonic
- Department of Pathology, Amsterdam University Medical Center, VUMC, University of Amsterdam, Amsterdam, Netherlands
| | - I Rapa
- Pathology Unit, San Luigi Hospital, Orbassano Turin, Italy
| | - A Rappa
- Oncogenomics Unit, European Institute of Oncology (IEO), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Milan, Italy
| | - C Roma
- Cell Biology and Biotherapy Unit, INT-Fondazione Pascale, Via M. Semmola, Naples, Italy
| | - M Rot
- Department of Pathology, University Clinic Golnik, Golnik, Slovenia
| | - J C Sabourin
- Department of Pathology, Rouen University Hospital, France and Normandie University, UNIROUEN, Inserm U1245, Rouen, France
| | - I Salmon
- Department of Pathology, Erasme Hospital, HUB ULB, Brussels, Belgium; CurePath, Jumet, Belgium
| | - S Savic Prince
- Department of Pathology, Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - A Scarpa
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, Verona, Italy
| | - E Schuuring
- Department of Pathology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - I Serre
- Department of Pathology, Gui de Chauliac Hospital, Montpellier University Medical Center, University of Montpellier, 80 Avenue Augustin Fliche, Montpellier, France
| | - V Siozopoulou
- Department of Pathology, University Hospital Antwerp and University of Antwerp, Antwerp, Belgium
| | - D Sizaret
- Department of Pathology, CHRU Tours - Hôpital Trousseau, Chambray-lès-Tours, France
| | - S Smojver-Ježek
- Division for Pulmonary Cytology, Department of Pathology and Cytology, University Hospital Centre Zagreb, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - J Solassol
- Solid Tumour Laboratory, Pathology and Oncobiology Department, CHU Montpellier, University of Montpellier, Montpellier, France
| | - K Steinestel
- Institute of Pathology and Molecular Pathology, Bundeswehrkrankenhaus Ulm, Oberer Eselsberg 40, 89081 Ulm, Germany
| | - J Stojšić
- Department of Thoracic Pathology, Section of Pathology, University Clinical Centre of Serbia, Belgrade, Serbia
| | - C Syrykh
- Department of Pathology, IUC-T-Oncopole, Toulouse, France
| | - S Timofeev
- Multidisciplinary Clinical Center "Kommunarka" of the Moscow Health Department, Moscow, Russia
| | - G Troncone
- Department of Pathology, University of Oradea, Oradea, Romania
| | - A Uguen
- Department of Pathological Anatomy and Cytology, CHRU de Brest, Brest, France; LBAI, UMR1227, INSERM, University of Brest, CHU de Brest, Brest, France
| | - S Valmary-Degano
- Department of Pathology, Institute for Advanced Biosciences, CHU Grenoble Alpes, Université Grenoble Alpes, Grenoble, France
| | - A Vigier
- Department of Pathology, IUC-T-Oncopole, Toulouse, France
| | - M Volante
- Department of Oncology, University of Turin, San Luigi Hospital, Orbassano, Turin, Italy
| | - S G F Wahl
- Department of Pathology, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway
| | - A Stenzinger
- Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany; Translational Lung Research Center Heidelberg (TLRC-H), member of the German Center for Lung Research (DZL), Heidelberg, Germany
| | - M Ilié
- Laboratory of Clinical and Experimental Pathology, FHU OncoAge, Biobank Côte d'Azur BB-0033-00025, Louis Pasteur Hospital, IRCAN, Université Côte d'Azur, Nice, France
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Ottestad AL, Johansen H, Halvorsen TO, Dai HY, Wahl SGF, Emdal EF, Grønberg BH. Correction: Associations between detectable circulating tumor DNA and tumor glucose uptake measured by 18F-FDG PET/CT in early-stage non-small cell lung cancer. BMC Cancer 2023; 23:685. [PMID: 37474938 DOI: 10.1186/s12885-023-11173-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023] Open
Affiliation(s)
- Anine Larsen Ottestad
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway.
- Department of Oncology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway.
| | - Håkon Johansen
- Department of Radiology and Nuclear Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Tarje Onsøien Halvorsen
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway
- Department of Oncology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Hong Yan Dai
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Sissel Gyrid Freim Wahl
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Elisabeth Fritzke Emdal
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Bjørn Henning Grønberg
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway
- Department of Oncology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
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Ottestad AL, Johansen H, Halvorsen TO, Dai HY, Wahl SGF, Emdal EF, Grønberg BH. Associations between detectable circulating tumor DNA and tumor glucose uptake measured by 18F-FDG PET/CT in early-stage non-small cell lung cancer. BMC Cancer 2023; 23:646. [PMID: 37434111 PMCID: PMC10334612 DOI: 10.1186/s12885-023-11147-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 03/15/2023] [Accepted: 07/03/2023] [Indexed: 07/13/2023] Open
Abstract
BACKGROUND The low level of circulating tumor DNA (ctDNA) in the blood is a well-known challenge for the application of liquid biopsies in early-stage non-small cell lung cancer (NSCLC) management. Studies of metastatic NSCLC indicate that ctDNA levels are associated with tumor metabolic activity as measured by 18F-fluorodeoxyglucose positron emission tomography (18F-FDG PET/CT). This study investigated this association in NSCLC patients considered for potentially curative treatment and explored whether the two methods provide independent prognostic information. METHOD Patients with stage I-III NSCLC who had routinely undergone an 18F-FDG PET/CT scan and exploratory ctDNA analyses were included. Tumor glucose uptake was measured by maximum standardized uptake value (SUVmax), metabolic tumor volume (MTV), and total lesion glycolysis (TLG) from the 18F-FDG PET/CT scans. ctDNA detectability and quantity, using variant allele frequency, were estimated by tumor-informed ctDNA analyses. RESULTS In total, 63 patients (median age 70 years, 60% women, and 90% adenocarcinoma) were included. The tumor glucose uptake (SUVmax, MTV, and TLG) was significantly higher in patients with detectable ctDNA (n = 19, p < 0.001). The ctDNA quantity correlated with MTV (Spearman's ρ = 0.53, p = 0.021) and TLG (Spearman's ρ = 0.56, p = 0.013) but not with SUVmax (Spearman's ρ = 0.034, p = 0.15). ctDNA detection was associated with shorter OS independent of MTV (HR: 2.70, 95% CI: 1.07-6.82, p = 0.035) and TLG (HR: 2.63, 95% CI: 1.06-6.51, p = 0.036). Patients with high tumor glucose uptake and detectable ctDNA had shorter overall survival and progression-free survival than those without detectable ctDNA, though these associations were not statistically significant (p > 0.05). CONCLUSION There was a positive correlation between plasma ctDNA quantity and MTV and TLG in early-stage NSCLC patients. Despite the correlation, the results indicated that ctDNA detection was a negative prognostic factor independent of MTV and TLG.
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Affiliation(s)
- Anine Larsen Ottestad
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway.
- Department of Oncology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway.
| | - Håkon Johansen
- Department of Radiology and Nuclear Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Tarje Onsøien Halvorsen
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway
- Department of Oncology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Hong Yan Dai
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Sissel Gyrid Freim Wahl
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Elisabeth Fritzke Emdal
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
| | - Bjørn Henning Grønberg
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 7030, Norway
- Department of Oncology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, 7030, Norway
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Sandø AD, Fougner R, Røyset ES, Dai HY, Grønbech JE, Bringeland EA. Response Evaluation after Neoadjuvant Chemotherapy for Resectable Gastric Cancer. Cancers (Basel) 2023; 15:cancers15082318. [PMID: 37190246 DOI: 10.3390/cancers15082318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/22/2023] [Accepted: 04/13/2023] [Indexed: 05/17/2023] Open
Abstract
BACKGROUND The method of response evaluation following neoadjuvant chemotherapy (NAC) in resectable gastric cancer has been widely debated. An essential prerequisite is the ability to stratify patients into subsets of different long-term survival rates based on the response mode. Histopathological measures of regression have their limitations, and interest resides in CT-based methods that can be used in everyday settings. METHODS We conducted a population-based study (2007-2016) on 171 consecutive patients with gastric adenocarcinoma who were receiving NAC. Two methods of response evaluation were investigated: a strict radiological procedure using RECIST (downsizing), and a composite radiological/pathological procedure comparing the initial radiological TNM stage to the pathological ypTNM stage (downstaging). Clinicopathological variables that could predict the response were searched for, and correlations between the response mode and long-term survival rates were assessed. RESULTS RECIST failed to identify half of the patients progressing to metastatic disease, and it was unable to assign patients to subsets with different long-term survival rates based on the response mode. However, the TNM stage response mode did achieve this objective. Following re-staging, 48% (78/164) were downstaged, 15% (25/164) had an unchanged stage, and 37% (61/164) were upstaged. A total of 9% (15/164) showed a histopathological complete response. The 5-year overall survival rate was 65.3% (95% CI 54.7-75.9%) for TNM downstaged cases, 40.0% (95% CI 20.8-59.2%) for stable disease, and 14.8% (95% CI 6.0-23.6%) for patients with TNM progression, p < 0.001. In a multivariable ordinal regression model, the Lauren classification and tumor site were the only significant determinants of the response mode. CONCLUSIONS Downsizing, as a method for evaluating the response to NAC in gastric cancer, is discouraged. TNM re-staging by comparing the baseline radiological CT stage to the pathological stage following NAC is suggested as a useful method that may be used in everyday situations.
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Affiliation(s)
- Alina Desiree Sandø
- Department of Gastrointestinal Surgery, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, 7034 Trondheim, Norway
| | - Reidun Fougner
- Department of Radiology, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
| | - Elin Synnøve Røyset
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, 7034 Trondheim, Norway
- Department of Pathology, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
- Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
| | - Hong Yan Dai
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, 7034 Trondheim, Norway
- Department of Pathology, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
- Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
| | - Jon Erik Grønbech
- Department of Gastrointestinal Surgery, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, 7034 Trondheim, Norway
| | - Erling Audun Bringeland
- Department of Gastrointestinal Surgery, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology, 7034 Trondheim, Norway
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Ottestad AL, Huang M, Emdal EF, Mjelle R, Skarpeteig V, Dai HY. Assessment of Two Commercial Comprehensive Gene Panels for Personalized Cancer Treatment. J Pers Med 2022; 13:jpm13010042. [PMID: 36675703 PMCID: PMC9863125 DOI: 10.3390/jpm13010042] [Citation(s) in RCA: 3] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022] Open
Abstract
(1) Background: Analysis of tumor DNA by next-generation sequencing (NGS) plays various roles in the classification and management of cancer. This study aimed to assess the performance of two similar and large, comprehensive gene panels with a focus on clinically relevant variant detection and tumor mutation burden (TMB) assessment; (2) Methods: DNA from 19 diagnostic small cell lung cancer biopsies and an AcroMetrix™ assessment sample with >500 mutations were sequenced using Oncomine™ Comprehensive Assay Plus (OCAP) on the Ion Torrent platform and TruSight Oncology 500 Assay (TSO500) on the Illumina platform; (3) Results: OCAP and TSO500 achieved comparable NGS quality, such as mean read coverage and mean coverage uniformity. A total of 100% of the variants in the diagnostic samples and 80% of the variants in the AcroMetrix™ assessment sample were detected by both panels, and the panels reported highly similar variant allele frequency. A proportion of 14/19 (74%) samples were classified in the same TMB category; (4) Conclusions: Comparable results were obtained using OCAP and TSO500, suggesting that both panels could be applied to screen patients for enrolment in personalized cancer treatment trials.
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Affiliation(s)
- Anine Larsen Ottestad
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7030 Trondheim, Norway
- Department of Oncology, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
- Correspondence:
| | - Mo Huang
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7030 Trondheim, Norway
- Department of Oncology, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
- Department of Biosciences and Nutrition, Karolinska Institute, 17177 Stockholm, Sweden
| | - Elisabeth Fritzke Emdal
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
| | - Robin Mjelle
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7030 Trondheim, Norway
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
| | - Veronica Skarpeteig
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
| | - Hong Yan Dai
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7030 Trondheim, Norway
- Department of Pathology, Clinic of Laboratory Medicine, St. Olavs Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
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Ottestad AL, Emdal EF, Grønberg BH, Halvorsen TO, Dai HY. Fragmentation assessment of FFPE DNA helps in evaluating NGS library complexity and interpretation of NGS results. Exp Mol Pathol 2022; 126:104771. [DOI: 10.1016/j.yexmp.2022.104771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 03/13/2022] [Accepted: 04/09/2022] [Indexed: 11/04/2022]
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Dai HY, Zhu KC, Wang QJ, Zhang XL, Wang Q. [Learning curve and short-term clinical outcomes of Mako robotic-assisted direct anterior approach total hip arthroplasty]. Zhonghua Yi Xue Za Zhi 2022; 102:49-55. [PMID: 34991237 DOI: 10.3760/cma.j.cn112137-20210806-01754] [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: 06/14/2023]
Abstract
Objective: To explore the learning curve and short-term clinical outcomes of Mako robotic-assisted direct anterior approach total hip arthroplasty (THA). Methods: The preoperative basic data, surgical information and postoperative rehabilitation of 50 patients who underwent Mako robotic-assisted THA for hip diseases in Department of Orthopedic Surgery of the 6th People's Hospital Affiliated to Shanghai Jiao Tong University from December 2018 to December 2020 were analyzed retrospectively, included operation time, intraoperative blood loss, postoperative complications, postoperative imaging parameters (abduction angle, anteversion angle, lower limb length difference, eccentricity difference) and postoperative hip joint Harris score (hip Harris score, HHS). There were 16 males and 34 females, with a mean age of 50-79(67±10) years. The postoperative clinical results of Mako robotic-assisted total hip arthroplasty was analyzed. A cumulative sum analysis (CUSUM) was performed on the operation time (OT). The CUSUM learning curve was modeled by curve fitting and R² was used to testify the goodness. The different phase of the learning curve was compared with several observation indicators. Results: All patients were followed up for more than 6 months. Two patients had poor wound healing and 5 patients had symptoms of lateral femoral cutaneous nerve injury, which disappeared within 1-2 months. No serious complications such as dislocation, aseptic loosening, periprosthetic infection or revision occurred in all the patients. The average operation time was (81±16) min, and the intraoperative blood loss was (456±84) ml. The average Harris hip score at the last follow-up was 88.6±2.5. The radiological evaluation showed that the positions of the acetabular cups were all in the Lewinnnek safety zone; the limb length discrepancy was (0.15±0.50) cm, the offset was (-0.11±0.72) cm. The OT decreased with the accumulation of the cases. The CUSUM learning curve was best modeled as cubic curve,the fitting curve reached the top at the 19th case. As a cut-off point, the 19th point divided the learing curve into two phases. There were statistical differences in OT, pelvic array installation time, acetabular registration time, acetabular reaming time (all P<0.05), but there was no significant differences in Harris hip score, acetabular prosthesis anteversion angle and abduction angle between the two groups (all P>0.05). Conclusions: The learning curve of Mako robot-assisted DAA-THA is about 19 cases. Mako robot-assisted DAA-THA can ensure the accuracy of prosthetic placement and the safety of the operation during the learning curve, and the short-term clinical results after surgery is excellent.
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Affiliation(s)
- H Y Dai
- Department of Orthopedic Surgery, the 6th People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, China
| | - K C Zhu
- Department of Orthopedic Surgery, the 6th People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, China
| | - Q J Wang
- Department of Orthopedic Surgery, the 6th People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, China
| | - X L Zhang
- Department of Orthopedic Surgery, the 6th People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, China
| | - Q Wang
- Department of Orthopedic Surgery, the 6th People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, China
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Ottestad AL, Dai HY, Halvorsen TO, Emdal EF, Wahl SGF, Grønberg BH. Associations between tumor mutations in cfDNA and survival in non-small cell lung cancer. Cancer Treat Res Commun 2021; 29:100471. [PMID: 34607221 DOI: 10.1016/j.ctarc.2021.100471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 07/30/2021] [Revised: 09/26/2021] [Accepted: 09/27/2021] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Studies have indicated that detection of mutated KRAS or EGFR in circulating tumor DNA (ctDNA) from pre-treatment plasma samples is a negative prognostic factor for non-small cell lung cancer (NSCLC) patients. This study aims to investigate whether this is the case also for NSCLC patients with other tumor mutations. METHODS Tumor tissue DNA from 107 NSCLC patients was sequenced and corresponding pre-treatment plasma samples were analyzed using a limited target next-generation sequencing approach validated in this study. Patients without detected mutations in tumor samples were excluded from further analyses. RESULTS Mutations were detected in tumor samples from 71 patients. Median age was 68 years, 51% were female, and 88% were current/former smokers, 91% had adenocarcinoma, 4% had squamous cell carcinoma and 6% had other NSCLC. The distribution between stage I, II, III and IV was 33%, 8%, 30%, and 29%, respectively. Between one and three tumor mutation(s) were detected in ctDNA from corresponding plasma samples. Patients with detected ctDNA had shorter PFS (9.6 vs. 41.3 months, HR: 2.9, 95% CI: 1.6-5.2, p = 0.0003) and OS (13.6 vs. 115.0 months, HR: 4.0, 95% CI: 2.1-7.6, p = 0.00002) than patients without detected ctDNA. ctDNA remained a significant negative prognostic factor for OS (HR: 2.5, 95% CI: 1.1-5.7, p=0.0327), but not PFS, in the multivariable analyses adjusting for baseline patient and disease characteristics including stage of disease. CONCLUSIONS This study adds further evidence supporting that detectable tumor mutations in cfDNA is associated with a worse prognosis in NSCLC harboring a variety of tumor mutations.
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Affiliation(s)
- Anine Larsen Ottestad
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway; Department of Oncology, Cancer Clinic, St. Olav's Hospital, Trondheim University Hospital, 7006, Trondheim, Norway
| | - Hong Yan Dai
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway; Department of Pathology, Clinic of Laboratory Medicine, St. Olav's Hospital, Trondheim University Hospital, 7006 Trondheim, Norway
| | - Tarje Onsøien Halvorsen
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway; Department of Oncology, Cancer Clinic, St. Olav's Hospital, Trondheim University Hospital, 7006, Trondheim, Norway
| | - Elisabeth Fritzke Emdal
- Department of Pathology, Clinic of Laboratory Medicine, St. Olav's Hospital, Trondheim University Hospital, 7006 Trondheim, Norway
| | - Sissel Gyrid Freim Wahl
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway; Department of Pathology, Clinic of Laboratory Medicine, St. Olav's Hospital, Trondheim University Hospital, 7006 Trondheim, Norway
| | - Bjørn Henning Grønberg
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway; Department of Oncology, Cancer Clinic, St. Olav's Hospital, Trondheim University Hospital, 7006, Trondheim, Norway.
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9
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Wahl SGF, Dai HY, Emdal EF, Berg T, Halvorsen TO, Ottestad AL, Lund-Iversen M, Brustugun OT, Førde D, Paulsen EE, Donnem T, Andersen S, Grønberg BH, Richardsen E. The Prognostic Effect of KRAS Mutations in Non-Small Cell Lung Carcinoma Revisited: A Norwegian Multicentre Study. Cancers (Basel) 2021; 13:4294. [PMID: 34503114 PMCID: PMC8428342 DOI: 10.3390/cancers13174294] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 07/26/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND due to emerging therapeutics targeting KRAS G12C and previous reports with conflicting results regarding the prognostic impact of KRAS and KRAS G12C in non-small cell lung cancer (NSCLC), we aimed to investigate the frequency of KRAS mutations and their associations with clinical characteristics and outcome. Since mutation subtypes have different preferences for downstream pathways, we also aimed to investigate whether there were differences in outcome according to mutation preference for the Raf, PI3K/Akt, or RalGDS/Ral pathways. METHODS retrospectively, clinicopathological data from 1233 stage I-IV non-squamous NSCLC patients with known KRAS status were reviewed. KRAS' associations with clinical characteristics were analysed. Progression free survival (PFS) and overall survival (OS) were assessed for the following groups: KRAS wild type (wt) versus mutated, KRAS wt versus KRAS G12C versus KRAS non-G12C, among KRAS mutation subtypes and among mutation subtypes grouped according to preference for downstream pathways. RESULTS a total of 1117 patients were included; 38% had KRAS mutated tumours, 17% had G12C. Among KRAS mutated, G12C was the most frequent mutation in former/current smokers (45%) and G12D in never smokers (46%). There were no significant differences in survival according to KRAS status, G12C status, among KRAS mutation subtypes or mutation preference for downstream pathways. CONCLUSION KRAS status or KRAS mutation subtype did not have any significant influence on PFS or OS.
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Affiliation(s)
- Sissel Gyrid Freim Wahl
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Technology and Science, N-7491 Trondheim, Norway; (H.Y.D.); (T.O.H.); (A.L.O.); (B.H.G.)
- Department of Pathology, St. Olav’s Hospital, Trondheim University Hospital, N-7006 Trondheim, Norway;
| | - Hong Yan Dai
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Technology and Science, N-7491 Trondheim, Norway; (H.Y.D.); (T.O.H.); (A.L.O.); (B.H.G.)
- Department of Pathology, St. Olav’s Hospital, Trondheim University Hospital, N-7006 Trondheim, Norway;
| | - Elisabeth Fritzke Emdal
- Department of Pathology, St. Olav’s Hospital, Trondheim University Hospital, N-7006 Trondheim, Norway;
| | - Thomas Berg
- Department of Clinical Pathology, University Hospital of North Norway, N-9038 Tromsø, Norway; (T.B.); (E.R.)
- Department of Medical Biology, UiT, The Arctic University of Norway, N-9011 Tromsø, Norway
| | - Tarje Onsøien Halvorsen
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Technology and Science, N-7491 Trondheim, Norway; (H.Y.D.); (T.O.H.); (A.L.O.); (B.H.G.)
- Department of Oncology, St. Olav’s Hospital, Trondheim University Hospital, N-7030 Trondheim, Norway
| | - Anine Larsen Ottestad
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Technology and Science, N-7491 Trondheim, Norway; (H.Y.D.); (T.O.H.); (A.L.O.); (B.H.G.)
- Department of Oncology, St. Olav’s Hospital, Trondheim University Hospital, N-7030 Trondheim, Norway
| | - Marius Lund-Iversen
- Department of Pathology, Oslo University Hospital, The Norwegian Radium Hospital, N-0310 Oslo, Norway;
| | - Odd Terje Brustugun
- Department of Cancer Genetics, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, N-0450 Oslo, Norway;
- Section of Oncology, Drammen Hospital, Vestre Viken Hospital Trust, N-3004 Drammen, Norway
| | - Dagny Førde
- Department of Clinical Medicine, UiT, The Arctic University of Norway, N-9037 Tromsø, Norway; (D.F.); (T.D.); (S.A.)
| | - Erna-Elise Paulsen
- Department of Pulmonary Medicine, University Hospital of North Norway, N-9028 Tromsø, Norway;
| | - Tom Donnem
- Department of Clinical Medicine, UiT, The Arctic University of Norway, N-9037 Tromsø, Norway; (D.F.); (T.D.); (S.A.)
- Department of Oncology, University Hospital of North Norway, N-9038 Tromsø, Norway
| | - Sigve Andersen
- Department of Clinical Medicine, UiT, The Arctic University of Norway, N-9037 Tromsø, Norway; (D.F.); (T.D.); (S.A.)
- Department of Oncology, University Hospital of North Norway, N-9038 Tromsø, Norway
| | - Bjørn Henning Grønberg
- Department of Clinical and Molecular Medicine, NTNU, Norwegian University of Technology and Science, N-7491 Trondheim, Norway; (H.Y.D.); (T.O.H.); (A.L.O.); (B.H.G.)
- Department of Oncology, St. Olav’s Hospital, Trondheim University Hospital, N-7030 Trondheim, Norway
| | - Elin Richardsen
- Department of Clinical Pathology, University Hospital of North Norway, N-9038 Tromsø, Norway; (T.B.); (E.R.)
- Department of Medical Biology, UiT, The Arctic University of Norway, N-9011 Tromsø, Norway
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Wahl SGF, Dai HY, Emdal EF, Ottestad AL, Dale VG, Richardsen E, Halvorsen TO, Grønberg BH. Prognostic value of absolute quantification of mutated KRAS in circulating tumour DNA in lung adenocarcinoma patients prior to therapy. J Pathol Clin Res 2021; 7:209-219. [PMID: 33502820 PMCID: PMC8073004 DOI: 10.1002/cjp2.200] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/21/2020] [Accepted: 01/04/2021] [Indexed: 12/13/2022]
Abstract
Droplet digital polymerase chain reaction (ddPCR) is a highly sensitive and accurate method for quantification of nucleic acid sequences. We used absolute quantification of mutated v-Ki-ras2 Kirsten rat sarcoma viral oncogene homology gene (KRAS) by ddPCR to investigate the prognostic role of mutated KRAS in patients with KRAS-mutated lung adenocarcinomas. Pre-treatment plasma samples from 60 patients with stages I-IV KRAS-mutated lung adenocarcinomas were analysed for KRAS mutations. The associations between survival, detectable KRAS mutations in plasma, and the plasma concentration of mutated KRAS were assessed. Overall, 23 of 60 (38%) patients had detectable KRAS mutation in plasma. The percentage of patients with detectable mutation was 8% in stage I, 30% in stage II, 71% in stage III, and 73% in stage IV. Estimated overall median progression-free survival (PFS) and overall survival (OS) were 26.2 months [95% confidence interval (CI) 12.5-39.9] and 50.8 months (95% CI 0-107.3), respectively. Patients with detectable mutations in plasma had significantly worse median PFS compared to patients with undetectable mutation (13.1 versus 70.1 months) and shorter median OS (20.7 versus not reached). High circulating tumour DNA (ctDNA) concentrations of mutated KRAS were significantly associated with shorter PFS [hazard ratio (HR) 1.008, 95% CI 1.004-1.012] and OS (HR 1.007, 95% CI 1.003-1.011). All associations remained statistically significant in multivariable analyses. In conclusion, ddPCR is an accurate and easily feasible technique for quantification of KRAS mutations in ctDNA. The presence of detectable KRAS mutation in plasma at baseline was associated with worse PFS and OS. High concentration of mutated KRAS in ctDNA was an independent negative prognostic factor for both PFS and OS.
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Affiliation(s)
- Sissel Gyrid Freim Wahl
- Department of PathologySt. Olavs Hospital, Trondheim University HospitalTrondheimNorway
- Department of Clinical and Molecular MedicineNTNU, Norwegian University of Technology and ScienceTrondheimNorway
| | - Hong Yan Dai
- Department of PathologySt. Olavs Hospital, Trondheim University HospitalTrondheimNorway
- Department of Clinical and Molecular MedicineNTNU, Norwegian University of Technology and ScienceTrondheimNorway
| | - Elisabeth F Emdal
- Department of PathologySt. Olavs Hospital, Trondheim University HospitalTrondheimNorway
| | - Anine L Ottestad
- Department of Clinical and Molecular MedicineNTNU, Norwegian University of Technology and ScienceTrondheimNorway
| | - Vibeke G Dale
- Department of PathologySt. Olavs Hospital, Trondheim University HospitalTrondheimNorway
| | - Elin Richardsen
- Department of Medical BiologyUiT, The Arctic University of NorwayTromsøNorway
- Department of Clinical PathologyUniversity Hospital of North NorwayTromsøNorway
| | - Tarje O Halvorsen
- Department of Clinical and Molecular MedicineNTNU, Norwegian University of Technology and ScienceTrondheimNorway
- Department of OncologySt. Olavs Hospital, Trondheim University HospitalTrondheimNorway
| | - Bjørn Henning Grønberg
- Department of Clinical and Molecular MedicineNTNU, Norwegian University of Technology and ScienceTrondheimNorway
- Department of OncologySt. Olavs Hospital, Trondheim University HospitalTrondheimNorway
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Mikkelsen VE, Dai HY, Stensjøen AL, Berntsen EM, Salvesen Ø, Solheim O, Torp SH. MGMT Promoter Methylation Status Is Not Related to Histological or Radiological Features in IDH Wild-type Glioblastomas. J Neuropathol Exp Neurol 2021; 79:855-862. [PMID: 32688383 DOI: 10.1093/jnen/nlaa060] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/25/2020] [Accepted: 06/03/2020] [Indexed: 11/15/2022] Open
Abstract
O6-methylguanine DNA methyltransferase (MGMT) promoter methylation is an important favorable predictive marker in patients with glioblastoma (GBM). We hypothesized that MGMT status could be a surrogate marker of pretreatment tumor biology observed as histopathological and radiological features. Apart from some radiological studies aiming to noninvasively predict the MGMT status, few studies have investigated relationships between MGMT status and phenotypical tumor biology. We have therefore aimed to investigate such relationships in 85 isocitrate dehydrogenase (IDH) wild-type GBMs. MGMT status was determined by methylation-specific PCR and was assessed for associations with 22 histopathological features, immunohistochemical proliferative index and microvessel density measurements, conventional magnetic resonance imaging characteristics, preoperative speed of tumor growth, and overall survival. None of the investigated histological or radiological features were significantly associated with MGMT status. Methylated MGMT status was a significant independent predictor of improved overall survival. In conclusion, our results suggest that MGMT status is not related to the pretreatment phenotypical biology in IDH wild-type GBMs. Furthermore, our findings suggest the survival benefit of MGMT methylated GBMs is not due to an inherently less aggressive tumor biology, and that conventional magnetic resonance imaging features cannot be used to noninvasively predict the MGMT status.
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Affiliation(s)
- Vilde Elisabeth Mikkelsen
- From the Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology
| | - Hong Yan Dai
- Department of Pathology, St Olav's University Hospital
| | - Anne Line Stensjøen
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology
| | - Erik Magnus Berntsen
- Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology.,Department of Radiology and Nuclear Medicine, St. Olav's University Hospital
| | | | - Ole Solheim
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology.,Department of Neurosurgery, St. Olav's University Hospital, Trondheim, Norway
| | - Sverre Helge Torp
- From the Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU-Norwegian University of Science and Technology.,Department of Pathology, St Olav's University Hospital
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Xia FF, Chu Q, Dai HY. [A case of thrombus formation on left atrial closure device]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:703-705. [PMID: 32847329 DOI: 10.3760/cma.j.cn112148-20200706-00537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- F F Xia
- Department of Cardiology, Qingdao Municipal Hospital, Qingdao 266000, China
| | - Q Chu
- Department of Cardiology, Qingdao Municipal Hospital, Qingdao 266000, China
| | - H Y Dai
- Department of Cardiology, Qingdao Municipal Hospital, Qingdao 266000, China
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13
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Ottestad AL, Emdal EF, Wahl SG, Grønberg BH, Dai HY. Abstract 3099: Ultra-deep next-generation sequencing of selected single genes for detecting circulating tumor DNA in lung cancer patients. Cancer Res 2020. [DOI: 10.1158/1538-7445.am2020-3099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose
Circulating tumor DNA (ctDNA) can potentially be used to monitor cancer treatment response. In this study, we developed and used a sensitive and selective ultra-deep next-generation sequencing (NGS) approach for detection of ctDNA in lung cancer patients.
Method
Most studies use fixed gene panels for detection of ctDNA by NGS. Deep sequencing of large target regions is expensive and generates a myriad of variants, which are difficult to interpret. For the purpose of using ctDNA for monitoring, we try to overcome these challenges by sequencing only selected regions where mutations were previously found in the tumor. This method is more sensitive and cost-efficient.
In this study, we included about 80 lung cancer patients. Tumor DNA was sequenced with a large gene panel and somatic mutations were identified in each tumor. We then defined the target region according to the tumor mutations and selected primers for constructing NGS libraries. Since the coverage region is small it enables ultra-deep sequencing of several samples simultaneously.
We evaluated the lower limit of detection for this method by sequencing a series of artificially constructed samples with known mutant allele frequencies (MAFs). DNA from peripheral blood leucocytes was sequenced in parallel with plasma DNA to exclude variants from clonal hematopoiesis.
Preliminary results
Using 40 ng as input DNA, which contains approximately 12,000 haploid genomes, we detected mutations down to 0.02% MAF. This corresponds to about 6 mutated copies per mL plasma. Currently, we are applying this method on patient plasma DNA samples.
Conclusion
We have developed a sensitive method for ctDNA detection, and we will present the results of the lung cancer patient samples.
Citation Format: Anine Larsen Ottestad, Elisabeth F. Emdal, Sissel G. Wahl, Bjørn Henning Grønberg, Hong Yan Dai. Ultra-deep next-generation sequencing of selected single genes for detecting circulating tumor DNA in lung cancer patients [abstract]. In: Proceedings of the Annual Meeting of the American Association for Cancer Research 2020; 2020 Apr 27-28 and Jun 22-24. Philadelphia (PA): AACR; Cancer Res 2020;80(16 Suppl):Abstract nr 3099.
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Affiliation(s)
| | | | - Sissel G. Wahl
- 1Norwegian University of Science and Technology, Trondheim, Norway
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14
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Skjulsvik AJ, Bø HK, Jakola AS, Berntsen EM, Bø LE, Reinertsen I, Myrmel KS, Sjåvik K, Åberg K, Berg T, Dai HY, Kloster R, Torp SH, Solheim O. Is the anatomical distribution of low-grade gliomas linked to regions of gliogenesis? J Neurooncol 2020; 147:147-157. [PMID: 31983026 PMCID: PMC7075820 DOI: 10.1007/s11060-020-03409-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/20/2020] [Indexed: 12/02/2022]
Abstract
INTRODUCTION According to the stem cell theory, two neurogenic niches in the adult human brain may harbor cells that initiate the formation of gliomas: The larger subventricular zone (SVZ) and the subgranular zone (SGZ) in the hippocampus. We wanted to explore whether defining molecular markers in low-grade gliomas (LGG; WHO grade II) are related to distance to the neurogenic niches. METHODS Patients treated at two Norwegian university hospitals with population-based referral were included. Eligible patients had histopathological verified supratentorial low-grade glioma. IDH mutational status and 1p19q co-deletion status was retrospectively assessed. 159 patients were included, and semi-automatic tumor segmentation was done from pre-treatment T2-weighted (T2W) or Fluid-Attenuated Inversion Recovery (FLAIR) images. 3D maps showing the anatomical distribution of the tumors were then created for each of the three molecular subtypes (IDH mutated/1p19q co-deleted, IDH mutated and IDH wild-type). Both distance from tumor center and tumor border to the neurogenic niches were recorded. RESULTS In this population-based cohort of previously untreated low-grade gliomas, we found that low-grade gliomas are more often found closer to the SVZ than the SGZ, but IDH wild-type tumors are more often found near SGZ. CONCLUSION Our study suggests that the stem cell origin of IDH wild-type and IDH mutated low-grade gliomas may be different.
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Affiliation(s)
- Anne Jarstein Skjulsvik
- Department of Pathology, St. Olavs University Hospital, Trondheim, Norway
- Departments of Clinical and Molecular Medicine, Faculty of Medicine, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Hans Kristian Bø
- Department of Diagnostic Imaging, Nordland Hospital Trust, Bodø, Norway
- Department of Circulation and Medical Imaging, Faculty of Medicine, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Asgeir Store Jakola
- Department of Neurosurgery, Sahlgrenska University Hospital, Gothenburg, Sweden
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg, Sweden
- Department of Neuroscience and Movement Medicine, Faculty of Medicine, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Erik Magnus Berntsen
- Department of Circulation and Medical Imaging, Faculty of Medicine, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
- Department of Radiology and Nuclear Medicine, St. Olavs University Hospital, Olav Kyrres Gate, 7006 Trondheim, Norway
| | - Lars Eirik Bø
- Department of Health Research, SINTEF Digital, Trondheim, Norway
| | | | | | - Kristin Sjåvik
- Department of Neurosurgery, University Hospital of North Norway, Tromsö, Norway
| | - Kristin Åberg
- Department of Clinical Pathology, University Hospital of North Norway, Tromsö, Norway
| | - Thomas Berg
- Department of Clinical Pathology, University Hospital of North Norway, Tromsö, Norway
| | - Hong Yan Dai
- Department of Pathology, St. Olavs University Hospital, Trondheim, Norway
| | - Roar Kloster
- Department of Neurosurgery, University Hospital of North Norway, Tromsö, Norway
| | - Sverre Helge Torp
- Department of Pathology, St. Olavs University Hospital, Trondheim, Norway
- Departments of Clinical and Molecular Medicine, Faculty of Medicine, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Ole Solheim
- Department of Neurosurgery, St. Olavs University Hospital, Olav Kyrres Gate, 7006 Trondheim, Norway
- Department of Neuroscience and Movement Medicine, Faculty of Medicine, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
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15
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Ottestad AL, Wahl SGF, Grønberg BH, Skorpen F, Dai HY. The relevance of tumor mutation profiling in interpretation of NGS data from cell-free DNA in non-small cell lung cancer patients. Exp Mol Pathol 2019; 112:104347. [PMID: 31759951 DOI: 10.1016/j.yexmp.2019.104347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 08/07/2019] [Revised: 11/11/2019] [Accepted: 11/19/2019] [Indexed: 11/26/2022]
Abstract
Studies have indicated that detection of circulating tumor DNA (ctDNA) prior to treatment is a negative prognostic marker in non-small cell lung cancer (NSCLC). ctDNA is currently identified by detection of tumor mutations. Commercial next-generation sequencing (NGS) assays for mutation analysis of ctDNA for routine practice usually include small gene panels and are not suitable for general mutation analysis. In this study, we investigated whether mutation analysis of cfDNA could be performed using a commercially available comprehensive NGS gene panel and bioinformatics workflow. Tumor DNA, plasma DNA and peripheral blood leukocyte DNA from 30 NSCLC patients were sequenced. In two patients (7%), tumor mutations in cfDNA were immediately called by the bioinformatic workflow. In 13 patients (43%), tumor mutations were not called, but were present in ctDNA and were identified based on the known tumor mutation profile. In the remaining 15 patients (50%), no concordant mutations were detected. In conclusion, we were able to identify tumor mutations in ctDNA from 57% of NSCLC patients using a comprehensive gene panel. We demonstrated that sequencing paired tumor DNA was helpful to interpret data and confirm ctDNA, and thus increased the ratio of patients with detectable ctDNA. This approach might be feasible for mutation analysis of ctDNA in routine diagnostic practice, especially in case of suboptimal plasma quality and quantity.
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Affiliation(s)
- Anine Larsen Ottestad
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Cancer Clinic, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway.
| | - Sissel G F Wahl
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Department of Pathology, Clinic of Laboratory Medicine, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Bjørn Henning Grønberg
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Cancer Clinic, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Frank Skorpen
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Cancer Clinic, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Hong Yan Dai
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Department of Pathology, Clinic of Laboratory Medicine, St. Olav's Hospital, Trondheim University Hospital, Trondheim, Norway
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16
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Zhou RM, Shao B, Luo C, Dai HY, Xu J, Li XY, Wang N, Zhang RX, Ji F, Yang B, Jiang ZW, Hu F, Liu SP, Yao JJ, Liu Y, Zhou YW, Guan JX, Xiao ZM, Lu ZN. [Analysis of differences in epidemiology and clinical features of Guillain-Barré syndrome between rural and urban areas of southern China]. Zhonghua Yi Xue Za Zhi 2019; 99:3432-3436. [PMID: 31752474 DOI: 10.3760/cma.j.issn.0376-2491.2019.43.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Objective: To explore the differences in epidemiology and clinical features of Guillain- Barré syndrome (GBS) between rural and urban areas of southern China. Methods: The clinical data of 759 hospitalized GBS patients from 31 hospitals of 13 provinces/cities in southern China, between January 1st, 2013 and September 30th, 2016, were collected and analyzed retrospectively. Results: The risk of GBS was higher for males than females in rural and urban areas and the median age was 49 and 48 years, respectively. Seasonal clustering in winter and spring was noted in both rural and urban areas, and the seasonal trend was more markedly in rural areas, but the differences showed no statistical significance. There were 70.37% of patients in rural areas and 73.69% in urban areas who had antecedent respiratory infection. The median time from onset to nadir was 7 days, and Hughes Disability Scale at admission, nadir and discharge were (2.95±1.10 vs 2.84±1.15), (3.25±1.11 vs 3.14±1.21), (2.02±1.24 vs 2.00±1.31) in rural and urban areas respectively. Albuminocytologic dissociation was present in 84.34% of patients in rural areas and 84.62% of cases in urban areas. There were 8.65% and 10.94% of cases in rural and urban areas who required mechanical ventilation during hospitalization, respectively. Demyelinating GBS accounted for 53.29% and 48.77%, respectively, in patients with findings of nerve conduction studies available in rural and urban areas. Conclusions: GBS in rural areas of southern China showed male predominance and a peak of spring and winter occurrence, with respiratory infection as the predominated preceding events and demyelinating GBS being main clinical subtype. Winter and spring showed a higher incidence of GBS in rural and urban areas. There were no significant differences of sex, age, preceding events, season trend, progression of disease, clinical subtypes and cerebrospinal fluid investigations in GBS patients between rural and urban areas.
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Affiliation(s)
- R M Zhou
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - B Shao
- Department of Neurology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - C Luo
- Department of Rehabilitation Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - H Y Dai
- Department of Neurology, Sichuan Provincial People's Hospital, Chengdu 410072, China
| | - J Xu
- Department of Neurology, Northern Jiangsu People's Hospital, Yangzhou 225001, China
| | - X Y Li
- Department of Neurology, Guizhou Provincial People's Hospital, Guiyang 550002, China
| | - N Wang
- Department of Neurology, Affiliated Taihe Hospital of Hubei University of Medicine, Shiyan 442000, China
| | - R X Zhang
- Department of Neurology, the Third Xiangya Hospital of Central South University, Changsha 410000, China
| | - F Ji
- Department of Neurology, the First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China
| | - B Yang
- Department ofNeurology, Yichang Central People's Hospital, China Three Gorges University, Yichang 443003, China
| | - Z W Jiang
- Department of Neurology, the First Affiliated Hospital of Yangtze University, Jingzhou 434000, China
| | - F Hu
- Department of Neurology, Jiangxi Provincial People's Hospital, Nanchang 330006, China
| | - S P Liu
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - J J Yao
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Y Liu
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Y W Zhou
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - J X Guan
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Z M Xiao
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Z N Lu
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
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17
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Jakola AS, Skjulsvik AJ, Myrmel KS, Sjåvik K, Unsgård G, Torp SH, Aaberg K, Berg T, Dai HY, Johnsen K, Kloster R, Solheim O. Surgical resection versus watchful waiting in low-grade gliomas. Ann Oncol 2018; 28:1942-1948. [PMID: 28475680 PMCID: PMC5834105 DOI: 10.1093/annonc/mdx230] [Citation(s) in RCA: 182] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Background Infiltrating low-grade gliomas (LGG; WHO grade 2) typically present with seizures in young adults. LGGs grow continuously and usually transform to higher grade of malignancy, eventually causing progressive disability and premature death. The effect of up-front surgery has been controversial and the impact of molecular biology on the effect of surgery is unknown. We now present long-term results of upfront surgical resection compared with watchful waiting in light of recently established molecular markers. Materials and methods Population-based parallel cohorts were followed from two Norwegian university hospitals with different surgical treatment strategies and defined geographical catchment regions. In region A watchful waiting was favored while early resection was favored in region B. Thus, the treatment strategy in individual patients depended on their residential address. The inclusion criteria were histopathological diagnosis of supratentorial LGG from 1998 through 2009 in patients 18 years or older. Follow-up ended 1 January 2016. Making regional comparisons, the primary end-point was overall survival. Results A total of 153 patients (66 from region A, 87 from region B) were included. Early resection was carried out in 19 (29%) patients in region A compared with 75 (86%) patients in region B. Overall survival was 5.8 years (95% CI 4.5-7.2) in region A compared with 14.4 years (95% CI 10.4-18.5) in region B (P < 0.01). The effect of surgical strategy remained after adjustment for molecular markers (P = 0.001). Conclusion In parallel population-based cohorts of LGGs, early surgical resection resulted in a clinical relevant survival benefit. The effect on survival persisted after adjustment for molecular markers.
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Affiliation(s)
- A S Jakola
- Department of Neurosurgery, St. Olavs University Hospital, Trondheim, Norway.,Department of Neurosurgery, Sahlgrenska University Hospital, Gothenburg.,Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - A J Skjulsvik
- Department of Pathology, St. Olavs University Hospital, Trondheim.,Department of Laboratory Medicine, Children's and Women's Health, Norwegian University of Science and Technology, Trondheim
| | | | - K Sjåvik
- Department of Neurosurgery, University Hospital of North Norway, Tromsø
| | - G Unsgård
- Department of Neurosurgery, St. Olavs University Hospital, Trondheim, Norway.,Department of Neuroscience, Norwegian University of Science and Technology, Trondheim.,National Advisory Unit for Ultrasound and Image Guided Therapy, St. Olavs University Hospital, Trondheim, Norway
| | - S H Torp
- Department of Pathology, St. Olavs University Hospital, Trondheim.,Department of Laboratory Medicine, Children's and Women's Health, Norwegian University of Science and Technology, Trondheim
| | - K Aaberg
- Department of Clinical Pathology
| | - T Berg
- Department of Clinical Pathology
| | - H Y Dai
- Department of Pathology, St. Olavs University Hospital, Trondheim
| | - K Johnsen
- Department of Neurosurgery, University Hospital of North Norway, Tromsø
| | - R Kloster
- Department of Neurosurgery, University Hospital of North Norway, Tromsø
| | - O Solheim
- Department of Neurosurgery, St. Olavs University Hospital, Trondheim, Norway.,Department of Neuroscience, Norwegian University of Science and Technology, Trondheim.,National Advisory Unit for Ultrasound and Image Guided Therapy, St. Olavs University Hospital, Trondheim, Norway
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18
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Karlberg A, Berntsen EM, Johansen H, Myrthue M, Skjulsvik AJ, Reinertsen I, Esmaeili M, Dai HY, Xiao Y, Rivaz H, Borghammer P, Solheim O, Eikenes L. Multimodal 18 F-Fluciclovine PET/MRI and Ultrasound-Guided Neurosurgery of an Anaplastic Oligodendroglioma. World Neurosurg 2017; 108:989.e1-989.e8. [DOI: 10.1016/j.wneu.2017.08.085] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 08/10/2017] [Accepted: 08/12/2017] [Indexed: 11/28/2022]
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19
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Rustad EH, Coward E, Skytøen ER, Misund K, Holien T, Standal T, Børset M, Beisvag V, Myklebost O, Meza-Zepeda LA, Dai HY, Sundan A, Waage A. Monitoring multiple myeloma by quantification of recurrent mutations in serum. Haematologica 2017; 102:1266-1272. [PMID: 28385781 PMCID: PMC5566041 DOI: 10.3324/haematol.2016.160564] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [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: 11/28/2016] [Accepted: 03/31/2017] [Indexed: 01/28/2023] Open
Abstract
Circulating tumor DNA is a promising biomarker to monitor tumor load and genome alterations. We explored the presence of circulating tumor DNA in multiple myeloma patients and its relation to disease activity during long-term follow-up. We used digital droplet polymerase chain reaction analysis to monitor recurrent mutations, mainly in mitogen activated protein kinase pathway genes NRAS, KRAS and BRAF. Mutations were identified by next-generation sequencing or polymerase chain reaction analysis of bone marrow plasma cells, and their presence analyzed in 251 archived serum samples obtained from 20 patients during a period of up to 7 years. In 17 of 18 patients, mutations identified in bone marrow during active disease were also found in a time-matched serum sample. The concentration of mutated alleles in serum correlated with the fraction in bone marrow plasma cells (r=0.507, n=34, P<0.002). There was a striking covariation between circulating mutation levels and M protein in ten out of 11 patients with sequential samples. When relapse evaluation by circulating tumor DNA and M protein could be directly compared, the circulating tumor DNA showed relapse earlier in two patients (3 and 9 months), later in one patient (4 months) and in three patients there was no difference. In three patients with transformation to aggressive disease, the concentrations of mutations in serum increased up to 400 times, an increase that was not seen for the M protein. In conclusion, circulating tumor DNA in myeloma is a multi-faceted biomarker reflecting mutated cells, total tumor mass and transformation to a more aggressive disease. Its properties are both similar and complementary to M protein.
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Affiliation(s)
- Even Holth Rustad
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Eivind Coward
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,Norwegian Cancer Genomics Consortium, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Emilie R Skytøen
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Kristine Misund
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Toril Holien
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Therese Standal
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,CEMIR - Center for Molecular Inflammation Research, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Magne Børset
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Vidar Beisvag
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Ola Myklebost
- Norwegian Cancer Genomics Consortium, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,Institute for Clinical Science, University of Bergen, Trondheim, Norway.,Institute for Cancer Research, Oslo University Hospital, Trondheim, Norway
| | - Leonardo A Meza-Zepeda
- Norwegian Cancer Genomics Consortium, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,Institute for Cancer Research, Oslo University Hospital, Trondheim, Norway
| | - Hong Yan Dai
- Department of Pathology and Medical Genetics, St. Olav's University Hospital, Trondheim, Norway
| | - Anders Sundan
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,CEMIR - Center for Molecular Inflammation Research, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Anders Waage
- Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, NTNU, Trondheim, Norway .,Norwegian Cancer Genomics Consortium, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,Department of Hematology, St. Olav's University Hospital, Trondheim, Norway
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20
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Abstract
We investigated azoospermia region microdeletions in male infertility patients with Klinefelter syndrome (KFS), as well as the association between azoospermia symptoms in patients with KFS and Y chromosome microdeletion polymorphisms. A total of 111 cases with male infertility confirmed to have KFS (47, XXY) and 94 fertile men were included in this study. Peripheral blood was drawn and DNA was extracted from these samples. Multiplex polymerase chain reaction was performed to screen the partial deletions of 25 sequence-tagged sites on the Y chromosome. In 111 cases with KFS, 1 case contained the AZFb+d+c deletion. The Gr/Gr deletion was identified in 12 KFS cases and 5 control cases. In addition, the b2/b3 deletion was identified in 13 KFS cases and 6 control cases. There were no significant differences in phenotype and genotype of the 2 partial AZFc deletions between patients and controls (P > 0.05). Our results suggest that patients with KFS may also have Y chromosome microdeletions to varying degrees and that the gr/gr deletion and b2/b3 deletion may not play a role in the susceptible genetic background of azoospermia in patients with KFS in the Sichuan population.
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Affiliation(s)
- L X Li
- Laboratory of Molecular Medicine, Yongchuan Hospital Chongqing Medical University, Bio-Resource Research and Utilization Joint Key Laboratory of Sichuan and Chongqing, Chongqing, China
| | - H Y Dai
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, Institute of Medical Genetics, School of Life Science, Sichuan University, Chengdu, China
| | - X P Ding
- Laboratory of Molecular Medicine, Yongchuan Hospital Chongqing Medical University, Bio-Resource Research and Utilization Joint Key Laboratory of Sichuan and Chongqing, Chongqing, China
| | - Y P Zhang
- Laboratory of Molecular Medicine, Yongchuan Hospital Chongqing Medical University, Bio-Resource Research and Utilization Joint Key Laboratory of Sichuan and Chongqing, Chongqing, China
| | - X H Zhang
- Laboratory of Molecular Medicine, Yongchuan Hospital Chongqing Medical University, Bio-Resource Research and Utilization Joint Key Laboratory of Sichuan and Chongqing, Chongqing, China
| | - H Y Ren
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, Institute of Medical Genetics, School of Life Science, Sichuan University, Chengdu, China
| | - Z Y Chen
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, Institute of Medical Genetics, School of Life Science, Sichuan University, Chengdu, China
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21
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Nahi H, Våtsveen TK, Lund J, Heeg BM, Preiss B, Alici E, Møller MB, Wader KF, Møller HE, Grøseth LA, Østergaard B, Dai HY, Holmberg E, Gahrton G, Waage A, Abildgaard N. Proteasome inhibitors and IMiDs can overcome some high-risk cytogenetics in multiple myeloma but not gain 1q21. Eur J Haematol 2015; 96:46-54. [DOI: 10.1111/ejh.12546] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2015] [Indexed: 12/31/2022]
Affiliation(s)
- Hareth Nahi
- Department of Medicine; Karolinska Institutet; Stockholm Sweden
| | - Thea Kristin Våtsveen
- KG Jebsen Center for Myeloma Research; Department of Cancer Research and Molecular Medicine; Norwegian University of Science and Technology; Trondheim Norway
- Department of Pathology; St Olavs Hospital; Trondheim Norway
| | - Johan Lund
- Department of Medicine; Karolinska Institutet; Stockholm Sweden
| | - Bart M.S. Heeg
- PharmacoEpidemiology & PharmacoEconomics (PE2); University of Groningen; Groningen The Netherlands
- Department of Epidemiology; University Medical Center Groningen; Groningen The Netherlands
| | - Birgitte Preiss
- Department of Pathology; Odense University Hospital; Odense Denmark
| | - Evren Alici
- Department of Medicine; Karolinska Institutet; Stockholm Sweden
| | | | - Karin Fahl Wader
- KG Jebsen Center for Myeloma Research; Department of Cancer Research and Molecular Medicine; Norwegian University of Science and Technology; Trondheim Norway
- Department of Oncology; St Olavs Hospital; Trondheim Norway
| | | | - Lill Anny Grøseth
- KG Jebsen Center for Myeloma Research; Department of Cancer Research and Molecular Medicine; Norwegian University of Science and Technology; Trondheim Norway
- Department of Hematology; St Olavs Hospital; Trondheim Norway
| | - Brian Østergaard
- Department of Hematology; Odense University Hospital; Odense Denmark
| | - Hong Yan Dai
- Department of Pathology; St Olavs Hospital; Trondheim Norway
| | - Erik Holmberg
- Department of Oncology; Institute of Clinical Sciences; Sahlgrenska Academy at University of Gothenburg; Gothenburg Sweden
| | - Gösta Gahrton
- Department of Medicine; Karolinska Institutet; Stockholm Sweden
| | - Anders Waage
- KG Jebsen Center for Myeloma Research; Department of Cancer Research and Molecular Medicine; Norwegian University of Science and Technology; Trondheim Norway
- Department of Hematology; St Olavs Hospital; Trondheim Norway
| | - Niels Abildgaard
- Department of Hematology; Odense University Hospital; Odense Denmark
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22
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Abstract
DNA markers are useful tools that play an important role in plant cultivar identification. They are usually based on polymerase chain reaction (PCR) and include simple sequence repeats (SSRs), inter-simple sequence repeats, and random amplified polymorphic DNA. However, DNA markers were not used effectively in the complete identification of plant cultivars because of the lack of known DNA fingerprints. Recently, a novel approach called the cultivar identification diagram (CID) strategy was developed to facilitate the use of DNA markers for separate plant individuals. The CID was designed whereby a polymorphic maker was generated from each PCR that directly allowed for cultivar sample separation at each step. Therefore, it could be used to identify cultivars and varieties easily with fewer primers. In this study, 60 apple cultivars, including a few main cultivars in fields and varieties from descendants (Fuji x Telamon) were examined. Of the 20 pairs of SSR primers screened, 8 pairs gave reproducible, polymorphic DNA amplification patterns. The banding patterns obtained from these 8 primers were used to construct a CID map. Each cultivar or variety in this study was distinguished from the others completely, indicating that this method can be used for efficient cultivar identification. The result contributed to studies on germplasm resources and the seedling industry in fruit trees.
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Affiliation(s)
- G S Liu
- College of Horticulture & Landscape, Hunan Agricultural University, Changsha, Hunan, China
| | - Y G Zhang
- College of Horticulture, Qingdao Agricultural University, Qingdao, Shandong, China
| | - R Tao
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - J G Fang
- College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - H Y Dai
- College of Horticulture, Qingdao Agricultural University, Qingdao, Shandong, China
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23
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Zhao YX, Yin HQ, Yu QT, Qiao Y, Dai HY, Zhang MX, Zhang L, Liu YF, Wang LC, Liu DS, Deng BP, Zhang YH, Pan CM, Song HD, Qu X, Jiang H, Liu CX, Lu XT, Liu B, Gao F, Dong B. ACE2 overexpression ameliorates left ventricular remodeling and dysfunction in a rat model of myocardial infarction. Hum Gene Ther 2011; 21:1545-54. [PMID: 20507236 DOI: 10.1089/hum.2009.160] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The purpose of this study was to test the hypothesis that overexpression of angiotensin-converting enzyme 2 (ACE2) may favorably affect left ventricular (LV) remodeling and function after myocardial infarction (MI). The left anterior descending coronary artery was ligated to produce anterior MI in 100 Wistar-Kyoto rats that were randomly divided into Ad-ACE2, Ad-ACE2+A779, Ad-EGFP, model, and sham groups. Two weeks later, rats in the Ad-ACE2 and Ad-EGFP groups received direct intramyocardial injection of Ad-ACE2 and Ad-EGFP, respectively. Rats in the Ad-ACE2+A779 group received both intramyocardial injection of Ad-ACE2 and a continuous intravenous infusion of A779 for 15 days. LV volume and systolic function, the extent of myocardial fibrosis, and levels of ACE2, angiotensin II (Ang II), and collagen I protein expression were evaluated. Four weeks after ACE2 gene transfer, the Ad-ACE2 group showed reduced LV volume, extent of myocardial fibrosis, and expression levels of ACE, Ang II, and collagen I in the myocardium, and increased LV ejection fraction and levels of ACE2 activity and expression in comparison with the Ad-EGFP and model groups. These results suggest that ACE2 overexpression attenuated LV fibrosis and improved LV remodeling and systolic function. In conclusion, overexpression of ACE2 favorably affected the pathological process of LV remodeling after MI by inhibiting ACE activity, reducing AngII levels, and up-regulating Ang-(1-7) expression, thus providing a potential therapeutic target in the treatment of heart failure.
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Affiliation(s)
- Yu Xia Zhao
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Shandong University Qilu Hospital, Jinan, Shandong, 250012, China
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24
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Våtsveen TK, Tian E, Kresse SH, Meza-Zepeda LA, Gabrea A, Glebov O, Dai HY, Sundan A, Kuehl WM, Børset M. OH-2, a hyperdiploid myeloma cell line without an IGH translocation, has a complex translocation juxtaposing MYC near MAFB and the IGK locus. Leuk Res 2009; 33:1670-7. [PMID: 19395026 DOI: 10.1016/j.leukres.2009.03.001] [Citation(s) in RCA: 12] [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] [Received: 01/21/2009] [Revised: 01/21/2009] [Accepted: 03/02/2009] [Indexed: 11/17/2022]
Abstract
Multiple myeloma can be classified into hyperdiploid (HRD) (with 48-74 chromosomes) and non-hyperdiploid tumors (usually with immunoglobulin heavy chain translocations). The OH-2 human myeloma cell line (HMCL) retains the same HRD genotype as the primary tumor, with extra copies of chromosomes 3, 7, 15, 19, and 21. Both OH-2 and primary cells have a complex secondary translocation in which the IGK 3' enhancer is inserted between MYC and MAFB, resulting in dysregulation of both oncogenes. OH-2 provides a unique example of an HMCL and the corresponding primary tumor that are shown to share the same HRD genotype.
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Affiliation(s)
- Thea Kristin Våtsveen
- Department of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
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25
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Kjaerheim K, Røe OD, Waterboer T, Sehr P, Rizk R, Dai HY, Sandeck H, Larsson E, Andersen A, Boffetta P, Pawlita M. Absence of SV40 antibodies or DNA fragments in prediagnostic mesothelioma serum samples. Int J Cancer 2007; 120:2459-65. [PMID: 17315193 DOI: 10.1002/ijc.22592] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [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: 11/08/2022]
Abstract
The rhesus monkey virus Simian Virus 40 (SV40) is a member of the polyomavirus family. It was introduced inadvertently to human populations through contaminated polio vaccine during the years 1956-1963, can induce experimental tumors in animals and transform human cells in culture. SV40 DNA has been identified in mesothelioma and other human tumors in some but not all studies. We tested prediagnostic sera from 49 mesothelioma cases and 147 matched controls for antibodies against the viral capsid protein VP1 and the large T antigen of SV40 and of the closely related human polyomaviruses BK and JC, and for SV40 DNA. Cases and controls were identified among donors to the Janus Serum Bank, which was linked to the Cancer Registry of Norway. Antibodies were analyzed by recently developed multiplex serology based on recombinantly expressed fusions of glutathione-S transferase with viral proteins as antigens combined with fluorescent bead technology. BKV and JCV specific antibodies cross- reactive with SV40 were preabsorbed with the respective VP1 proteins. Sera showing SV40 reactivity after preabsorption with BKV and JCV VP1 were further analyzed in SV40 neutralization assays. SV40 DNA was analyzed by SV40 specific polymerase chain reactions. The odds ratio for being a case when tested positive for SV40 VP1 in the antibody capture assay was 1.5 (95% CI 0.6-3.7) and 2.0 (95% CI 0.6-7.0) when only strongly reactive sera where counted as positive. Although some sera could neutralize SV40, preabsorption with BKV and JCV VP1 showed for all such sera that this neutralizing activity was due to cross-reacting antibodies and did not represent truly SV40-specific antibodies. No viral DNA was found in the sera. No significant association between SV40 antibody response in prediagnostic sera and risk of mesothelioma was seen.
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26
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Pan XY, Wang B, Che YC, Weng ZP, Dai HY, Peng W. Expression of claudin-3 and claudin-4 in normal, hyperplastic, and malignant endometrial tissue. Int J Gynecol Cancer 2007; 17:233-41. [PMID: 17291259 DOI: 10.1111/j.1525-1438.2006.00748.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [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: 12/13/2022] Open
Abstract
To clarify the roles of claudins in endometrial tumorigenesis, we determined levels of protein and messengerRNA (mRNA) expression of claudin-3 and claudin-4 in human endometrial tissue (proliferative phase [PE, n= 25]; secretory phase [SE, n= 25]; simple hyperplasia [SH, n= 20]; complex hyperplasia [CH, n= 12]; atypical hyperplasia [AH, n= 15]; endometrioid adenocarcinoma [EEC, n= 30]) using immunohistochemistry, western blotting, and real-time polymerase chain reaction, respectively. Morphologic changes of tight junctions (TJs) were also observed in normal, hyperplastic, and malignant endometrial tissue. Absence or weak staining for claudin-3 and claudin-4 was observed in PE, SE, SH, and CH, while medium to intense staining was detected in AH and EEC. Staining of claudin-3 and claudin-4 was predominantly localized to the glandular epithelial cell membrane. Expression of claudin-3 and claudin-4 was significantly increased in the groups of AH and EEC in comparison with the groups of CH, SH, and normal cyclic endometrium at both protein and mRNA levels. The highest expression was observed in EEC. Although no relevance was found with regard to FIGO stage and histologic grade, overexpression of claudin-3 and claudin-4, especially claudin-4, significantly correlated with myometrial invasion. Transmission electron microscopy analysis indicated morphologic disruptions of TJs may lag behind the increase of claudins expression. These results demonstrate that claudin-3 and claudin-4 are strongly expressed in AH and EEC, but less frequently in normal endometrium. The upregulation of claudins expression during endometrial carcinogenesis suggests their potential utility as diagnostic and prognostic biomarkers.
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Affiliation(s)
- X Y Pan
- Department of Obstetrics and Gynecology, QiLu Hospital of ShanDong University, JiNan, China.
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27
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Rao V, Ryggen K, Aarhaug M, Dai HY, Jørstad S, Moen T. Extracorporeal photochemotherapy in patients with cutaneous T-cell lymphoma: is clinical response predictable? J Eur Acad Dermatol Venereol 2007; 20:1100-7. [PMID: 16987266 DOI: 10.1111/j.1468-3083.2006.01745.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [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: 11/26/2022]
Abstract
BACKGROUND Extracorporeal photochemotherapy (ECP) has been accepted as a standard therapy in cutaneous T-cell lymphomas (CTCL), a category of lymphomas mainly resistant to conventional therapies. Approximately one half of patients demonstrate a reduction in skin affliction by at least 50% within 12 months of therapy and are categorized as responders to ECP. Predictive criteria for selecting patients who will respond to ECP are lacking. Such criteria would however, be of great benefit. OBJECTIVES This study compared T-cell clonality and serum levels of soluble interleukin-2 receptor (sIL-2R), lactate dehydrogenase (LD), neopterin, beta2-microglobulin (beta(2)-M) and granzyme B in CTCL patients in order to evaluate their potential usefulness as predictive markers. PATIENTS/METHODS Serum and T lymphocytes obtained from 16 patients with CTCL receiving ECP treatment were evaluated in an open retrospective study. RESULTS We found no evident correlation between detected T-cell clonality and response to ECP. The non-responding group had on average a higher level of serum sIL-2R. This difference was significant after 6 and 12 months of therapy, but not pretreatment. An individual reduction in serum sIL-2R, neopterin and beta(2)-M during a 6-month course of ECP was well correlated to clinical remission. CONCLUSIONS Seven out of 16 patients were classified as responders. Neither T-cell clonality nor any of the serum markers assessed pretreatment could reliably predict the response to ECP treatment. However, the individual relative changes in sIL-2R, neopterin and beta(2)-M during 6 months of ECP treatment coherently displayed correlation to the clinical response, as assessed after 12 months of ECP treatment.
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Affiliation(s)
- V Rao
- Department of Laboratory Medicine, Children's and Women's Health, Trondheim, Norwegian University of Science and Technology, Norway.
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Andersen S, Ericsson M, Dai HY, Peña-Diaz J, Slupphaug G, Nilsen H, Aarset H, Krokan HE. Monoclonal B-cell hyperplasia and leukocyte imbalance precede development of B-cell malignancies in uracil-DNA glycosylase deficient mice. DNA Repair (Amst) 2005; 4:1432-41. [PMID: 16174566 DOI: 10.1016/j.dnarep.2005.08.004] [Citation(s) in RCA: 35] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ung-deficient mice have reduced class switch recombination, skewed somatic hypermutation, lymphatic hyperplasia and a 22-fold increased risk of developing B-cell lymphomas. We find that lymphomas are of follicular (FL) and diffuse large B-cell type (DLBCL). All FLs and 75% of the DLBCLs were monoclonal while 25% were biclonal. Monoclonality was also observed in hyperplasia, and could represent an early stage of lymphoma development. Lymphoid hyperplasia occurs very early in otherwise healthy Ung-deficient mice, observed as a significant increase of splenic B-cells. Furthermore, loss of Ung also causes a significant reduction of T-helper cells, and 50% of the young Ung(-/-) mice investigated have no detectable NK/NKT-cell population in their spleen. The immunological imbalance is confirmed in experiments with spleen cells where the production of the cytokines interferon gamma, interleukin 6 and interleukin 2 is clearly different in wild type and in Ung-deficient mice. This suggests that Ung-proteins, directly or indirectly, have important functions in the immune system, not only in the process of antibody maturation, but also for production and functions of immunologically important cell types. The immunological imbalances shown here in the Ung-deficient mice may be central in the development of lymphomas in a background of generalised lymphoid hyperplasia.
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Affiliation(s)
- Sonja Andersen
- Department of Cancer Research and Molecular Medicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim
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Bruland T, Lavik LAS, Dai HY, Dalen A. Identification of Friend murine retrovirus-infected immune cells and studies of the effects of sex and steroid hormones in the early phase of infection. APMIS 2003; 111:878-90. [PMID: 14510645 DOI: 10.1034/j.1600-0463.2003.1110906.x] [Citation(s) in RCA: 2] [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: 11/23/2022]
Abstract
Male mice are more susceptible than female mice to the murine retrovirus FIS-2. We previously reported that sex-related factors influence early virus replication via mechanisms involving a glucocorticoid response element (GRE) in the long terminal repeat (LTR) enhancer region. In the present study, we investigated further the influence of sex and steroid hormones on early murine retrovirus dissemination and immune functions. In male mice we found a correlation between an early expansion of the CD8+ cell subset and rapid infection of lymphocytes, including CD8+ cells. Virus load in blood declined faster in females than in males, and the postpeak declines coincided with more rapidly generation of antibodies against virus-positive cells. Moreover, female-derived T-cells responded better to in vitro mitogen stimuli than male-derived T-cells. Physiological concentrations of progesterone and dexamethasone induced a dose-dependent inhibition of T-cell proliferation. Administration of progestin in vivo did not modify early FIS-2 production in female mice. Male castrated mice, who were notably less involved in aggressive behaviour and fighting compared to male control mice, had a significant delay of virus dissemination. We suggest that testosterone-dependent aggression, with successive enhanced stress hormone levels, may influence both FIS-2 replication and immune responses during infection.
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Affiliation(s)
- Torunn Bruland
- Department of Laboratory Medicine, Children's and Women's Health, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
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30
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Bruland T, Lavik LAS, Dai HY, Dalen A. A glucocorticoid response element in the LTR U3 region of Friend murine leukaemia virus variant FIS-2 enhances virus production in vitro and is a major determinant for sex differences in susceptibility to FIS-2 infection in vivo. J Gen Virol 2003; 84:907-916. [PMID: 12655091 DOI: 10.1099/vir.0.18625-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The nucleotide sequence of the Friend murine leukaemia virus variant FIS-2 LTR has high identity with the closely related Friend murine leukaemia virus (F-MuLV) LTR, except for the deletion of one direct repeat, a few point mutations and the generation of a glucocorticoid response element (GRE) in the U3 region. The GRE can mediate gene induction by glucocorticoids, mineral corticoids, progesterone and androgens, and it has been shown that incorporation of a GRE(s) within the LTR can increase the transcriptional activity of retroviral enhancers. We have previously reported an increased early virus replication in male mice compared with female mice when infected with a virus containing the FIS-2 LTR and have proposed that the GRE might contribute to this sex difference. In the present study, we introduced a single point mutation in the GRE and performed comparative studies in NIH 3T3 cells and in young adult male and female NMRI mice. We found that significantly more virus was produced from NIH 3T3 cells infected with wt FIS-2 than from cells infected with the FIS-2 GRE mutant and that this difference was further augmented by glucocorticoids. The glucocorticoid antagonist RU486 inhibited virus production in a dose-dependent manner. The wt FIS-2 disseminated significantly faster than the FIS-2 GRE mutant in both male and female mice. There was no significant difference in the dissemination rate between male and female mice infected with the FIS-2 GRE mutant. Hence, the GRE in the FIS-2 LTR is one determinant of the significant sex difference in susceptibility to FIS-2 infection.
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Affiliation(s)
- Torunn Bruland
- Department of Laboratory Medicine, Children's and Women's Health, Faculty of Medicine, Norwegian University of Science and Technology, MTFS Olav Kyrresg. 3, N-7489 Trondheim, Norway
| | | | | | - Are Dalen
- St Olavs Hospital HF, Trondheim, Norway
- Department of Laboratory Medicine, Children's and Women's Health, Faculty of Medicine, Norwegian University of Science and Technology, MTFS Olav Kyrresg. 3, N-7489 Trondheim, Norway
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Abstract
FIS-2, a less oncogenic, immunosuppressive variant of the Friend murine leukaemia virus (F-MuLV), was used to explore whether the differences in biological features were related to early virus dissemination rates or sites of replication. We found that erythroblasts were the primary target cells for both F-MuLV and FIS-2, while B- and T-cells were infected later in the infection. Although FIS-2 replicated to similar titres as F-MuLV, we observed a delay in peak viraemia titre and in the number of virus-positive cells in bone marrow and spleen. Studies including the chimeric viruses RE3 (FIS-2LTR with a F-MuLV background) and RE4 (F-MuLV LTR with a FIS-2 background) indicated that the delay in dissemination was due to mutations in FIS-2 LTR. The kinetics for early virus replication correlated with previously reported mean latency time for virus-induced erythroleukaemia in mice inoculated as newborns and with the onset of immunosuppression in adult mice. In addition, F-MuLV-induced late immunosuppression coincided with signs of erythroleukaemia and persistent viraemia. FIS-2 induced a more moderate late immunosuppression without persistent viraemia or signs of erythroleukaemia. Overall, our findings indicated that early viral replication is a prognostic factor in murine retrovirus-induced pathogenesis.
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Affiliation(s)
- Torunn Bruland
- Department of Laboratory Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
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Bruland T, Dai HY, Lavik LAS, Kristiansen LI, Dalen A. Gender-related differences in susceptibility, early virus dissemination and immunosuppression in mice infected with Friend murine leukaemia virus variant FIS-2. J Gen Virol 2001; 82:1821-1827. [PMID: 11457987 DOI: 10.1099/0022-1317-82-8-1821] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
An emerging amount of data indicates a correlation between gender-related factors and regulation of virus infection and supports what is known in clinical circles, that these topics are of great importance in many infectious diseases. In the present study we found that young adult NMRI male mice are more susceptible to infection by a variant of Friend murine leukaemia virus, FIS-2, than are female mice. We observed that the level of virus in serum, bone marrow and spleen was initially higher in male mice. Male mice were also more susceptible to FIS-2-induced immunosuppression. These results indicate a more efficient virus replication and dissemination in male mice. Studies with recombinant viruses between FIS-2 and the prototype Friend murine leukaemia virus revealed that FIS-2 LTR is one major factor contributing to the observed gender differences. A possible sex hormone influence on FIS-2 transcription due to the presence of a glucocorticoid response element in FIS-2 LTR is discussed.
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Affiliation(s)
- Torunn Bruland
- UNIGEN Center for Molecular Biology/Institute of Laboratory Medicine, Norwegian University of Science and Technology, N-7489 Trondheim, Norway1
| | - Hong Yan Dai
- UNIGEN Center for Molecular Biology/Institute of Laboratory Medicine, Norwegian University of Science and Technology, N-7489 Trondheim, Norway1
| | - Liss Anne S Lavik
- UNIGEN Center for Molecular Biology/Institute of Laboratory Medicine, Norwegian University of Science and Technology, N-7489 Trondheim, Norway1
| | - Lena I Kristiansen
- UNIGEN Center for Molecular Biology/Institute of Laboratory Medicine, Norwegian University of Science and Technology, N-7489 Trondheim, Norway1
| | - Are Dalen
- Department of Microbiology/Institute of Laboratory Medicine, Trondheim Regional Hospital/NTNU, N-7489 Trondheim, Norway2
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Abu-Zayyad T, Belov K, Bird DJ, Boyer J, Cao Z, Catanese M, Chen GF, Clay RW, Covault CE, Cronin JW, Dai HY, Dawson BR, Elbert JW, Fick BE, Fortson LF, Fowler JW, Gibbs KG, Glasmacher MA, Green KD, Ho Y, Huang A, Jui CC, Kidd MJ, Kieda DB, Knapp BC, Ko S. Evidence for changing of cosmic ray composition between 10(17) and 10(18) eV from multicomponent measurements. Phys Rev Lett 2000; 84:4276-4279. [PMID: 10990665 DOI: 10.1103/physrevlett.84.4276] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/1999] [Revised: 02/04/2000] [Indexed: 05/23/2023]
Abstract
The average mass composition of cosmic rays with primary energies between 10(17) and 10(18) eV has been studied using a hybrid detector consisting of the High Resolution Fly's Eye (HiRes) prototype and the MIA muon array. Measurements have been made of the change in the depth of shower maximum and the muon density as a function of energy. The results show that the composition is changing from a heavy to lighter mix as the energy increases.
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Affiliation(s)
- T Abu-Zayyad
- High Energy Astrophysics Institute, University of Utah, Salt Lake City, Utah 84112, USA
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Dai HY, Tsao N, Leung WC, Lei HY. Increase of intracellular pH in p53-dependent apoptosis of thymocytes induced by gamma radiation. Radiat Res 1998; 150:183-9. [PMID: 9692363] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Irradiation with gamma rays induces apoptosis of thymocytes by a p53-dependent pathway, but its mechanism is not clear. In this study, we report that gamma-ray-induced apoptosis was associated with the intracellular alkalinization of the thymocytes. After exposure to gamma rays, thymocytes underwent apoptosis when cultured in vitro, and the degree of apoptosis was dependent on the incubation period: The longer the incubation period, the greater the number of cells undergoing apoptosis. However, this apoptosis could be inhibited by the acidic condition of the culture. There was a positive correlation between the pHi of thymocytes and the degree of apoptosis. Treatment with gamma radiation induced apoptosis as well as the elevation of the pHi in thymocytes. The intracellular pH was higher in pre-apoptotic thymocytes than in those that did not undergo apoptosis. Furthermore, apoptosis induced by gamma radiation was inhibited by cycloheximide, actinomycin D or the intracellular Ca2+ chelator, TMB-8. The p53 protein is induced after gamma irradiation. Thus it appears that intracellular pH is increased during the gamma-ray-induced p53-dependent apoptosis of thymocytes.
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Affiliation(s)
- H Y Dai
- Department of Microbiology & Immunology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Dai HY, Troseth GI, Gunleksrud M, Bruland T, Solberg LA, Aarset H, Kristiansen LI, Dalen A. Identification of genetic determinants responsible for the rapid immunosuppressive activity and the low leukemogenic potential of a variant of Friend leukemia virus, FIS-2. J Virol 1998; 72:1244-51. [PMID: 9445024 PMCID: PMC124602 DOI: 10.1128/jvi.72.2.1244-1251.1998] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 02/05/2023] Open
Abstract
An immunosuppressive variant of Friend murine leukemia virus (F-MuLV), FIS-2, induces suppression of the primary antibody response against sheep erythrocytes (SRBC) in adult NMRI mice more efficiently than the prototype F-MuLV clone 57 (cl.57). It is, however, less potent than F-MuLV cl.57 in inducing erythroleukemia upon inoculation into newborn NMRI mice. Nucleotide sequence analysis shows a high degree of homology between the two viruses. Single point mutations are scattered over both the gag and the env encoding regions. The most notable mutations are the deletion of one direct repeat and a few single point mutations occurring in the binding sites for cellular transcriptional factors in the FIS-2 long terminal repeat region (LTR). To define the genetic determinants responsible for the pathogenic properties of FIS-2, we constructed six chimeras between FIS-2 and F-MuLV cl.57. Adult mice were infected with the chimeras, and their primary antibody responses against SRBC were investigated. The results showed that the fragment encompassing the FIS-2 env encoding region SU is responsible for the increased immunosuppressive activity in adult mice. A leukemogenicity assay was also performed by infecting newborn mice with the chimeras. Consistent with the previous studies, it showed that the deletion of one direct repeat in the FIS-2 LTR is responsible for the long latent period of erythroleukemia induced by FIS-2 in newborn-inoculated mice. However, studies of cell type-specific transcriptional activities of FIS-2 and F-MuLV cl.57 LTRs using LTR-chloramphenicol acetyltransferase constructs showed that the deletion of one direct repeat does not reduce the transcriptional activity of the FIS-2 LTR. The activity is either comparable to or higher than the transcriptional activity of the F-MuLV cl.57 LTR in the different cell lines that we used, even in an erythroleukemia cell line. It seems that the high transcriptional strength of the FIS-2 LTR is not sufficient to give FIS-2 a high leukemogenic effect. This suggestion is inconsistent with the previous suggestion that the transcriptional strength of an LTR in a given cell type is correlated with the leukemogenic potential in the corresponding tissue. In other words, these data indicate that the direct repeats in the F-MuLV LTR may play other roles besides transcriptional enhancer in the leukemogenesis of F-MuLV.
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Affiliation(s)
- H Y Dai
- Unigen Center for Molecular Biology, Norwegian University of Science and Technology, Trondheim.
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Dai HY, Faxvaag A, Troseth GI, Aarset H, Dalen A. Molecular cloning and characterization of an immunosuppressive and weakly oncogenic variant of Friend murine leukemia virus, FIS-2. J Virol 1994; 68:6976-84. [PMID: 7933079 PMCID: PMC237134 DOI: 10.1128/jvi.68.11.6976-6984.1994] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 01/27/2023] Open
Abstract
The FIS variant is a weakly leukemogenic, relatively strong immunosuppressive murine retrovirus which was isolated from the T helper cells of adult NMRI mice infected with Friend murine leukemia virus (F-MuLV) complex (FV). Unlike FV, it does not induce acute erythroleukemia but retains the immunosuppressive property of FV and induces suppression of the primary antibody response rapidly and persistently in adult mice. A previous study showed that the FIS variant contains two viral components, a replication-competent virus and a defective virus. In this study, we have biologically purified the FIS variant by end point dilution and we show that the replication-competent virus FIS-2 alone can induce immunosuppression as the parental FIS variant. Most newborn mice infected with FIS-2 developed erythroleukemia, but with an increased latency period compared with that of F-MuLV clone 57. In contrast, FIS-2 induced suppression of the primary antibody response and disease more rapidly than F-MuLV clone 57 in immunocompetent, adult mice. FIS-2 was further molecularly cloned and characterized. Restriction mapping and nucleotide sequence analysis of FIS-2 showed a high degree of homology between FIS-2 and F-MuLV clone 57, suggesting that FIS-2 is a variant of F-MuLV. The striking difference is the deletion of one of the tandem repeats in the FIS-2 long terminal repeat and the single point mutation in the binding sites for core-binding protein and FVa compared with the long terminal repeat of F-MuLV clone 57. Two single point mutations led to the appearance of two extra potential N glycosylation sites in the FIS-2 gag-encoded glycoprotein. Together, the results suggest that FIS-2 represents an interesting murine model to study retrovirus-induced immunosuppression on the basis of its unique combined property of low leukemogenicity and relatively strong and persistent immunosuppressive activity in adult mice.
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Affiliation(s)
- H Y Dai
- Unigen Center for Molecular Biology, University of Trondheim, Norway
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37
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Bird DJ, Corbató SC, Dai HY, Dawson BR, Elbert JW, Gaisser TK, Green KD, Huang MA, Kieda DB, Ko S, Larsen CG, Loh EC, Luo M, Salamon MH, Smith D, Sokolsky P, Sommers P, Stanev T, Tang JK, Thomas SB, Tilav S. Evidence for correlated changes in the spectrum and composition of cosmic rays at extremely high energies. Phys Rev Lett 1993; 71:3401-3404. [PMID: 10054968 DOI: 10.1103/physrevlett.71.3401] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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38
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Abstract
Friend leukemia complex (FLC) is known to induce immunosuppression but the use of FLC in studies of immune cells function is disadvantageous since the immunosuppression always is accompanied by an acute erythroleukemia. To obtain immunosuppressive variants of FLC with reduced leukemogenic potential, we isolated T-helper cells from FLC infected mice, and passed lysates of the cells to recipient uninfected mice. A group of these mice developed a condition distinct from the disease induced by FLC. A viral stock prepared from these mice, designated Fd-MIV for friend derived murine immunodeficiency virus, induced a profound suppression of the primary antibody response without acute transformation in adult NMRI mice. Terminally a wasting disease with weight loss, atrophy of the thymus and lymph nodes and renal disease was observed in some mice. Analysis of viral DNA and RNA from infected NIH 3T3 cells showed that Fd-MIV contained at least two viral components, a 8.4 kb friend murine leukemia virus (F-MuLV) and a 7.4 kb mink cell focus (MCF)/xenotropic virus related genome. The 7.4 kb genome was not detected in Fd-MIV infected, immunocompromised mice indicating that the 8.4 kb genome might be responsible for the disease.
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MESH Headings
- Animals
- Antibodies, Viral/biosynthesis
- B-Lymphocytes/microbiology
- Blotting, Northern
- Blotting, Southern
- Cell Transformation, Neoplastic
- DNA, Viral/analysis
- Disease Models, Animal
- Female
- Friend murine leukemia virus/genetics
- Friend murine leukemia virus/immunology
- Friend murine leukemia virus/isolation & purification
- Friend murine leukemia virus/pathogenicity
- Leukemia, Erythroblastic, Acute/microbiology
- Lymph Nodes/immunology
- Lymph Nodes/pathology
- Mice
- Mice, Inbred Strains
- Murine Acquired Immunodeficiency Syndrome/immunology
- Murine Acquired Immunodeficiency Syndrome/microbiology
- RNA, Messenger/analysis
- RNA, Viral/analysis
- Spleen/immunology
- Spleen/pathology
- T-Lymphocytes, Helper-Inducer/microbiology
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Affiliation(s)
- A Faxvaag
- Institute of Cancer Research, University of Trondheim, Norway
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39
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Sheh L, Dai HY, Kuan YH, Li CJ, Chiang CD, Cheng V. Synthesis and cytotoxicity studies of novel cyclic peptide-2,6-dimethoxyhydroquinone-3-mercaptoacetic acid conjugates. Anticancer Drug Des 1993; 8:237-47. [PMID: 8390838] [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: 01/30/2023]
Abstract
In an effort to investigate the use of small-ring-size cyclic peptides as carriers of new antitumor agents, we synthesized three cyclic tripeptide-cytotoxic agent conjugates. The cytotoxic agent conjugated to the epsilon-amino group of the lysyl residue of the cyclic peptides is 2,6-dimethoxyhydroquinone-3-mercaptoacetic acid (DMQ-MA), (Sheh et al., 1992). The cyclic peptides were synthesized by coupling protected amino acid residues in solution and the subsequent cyclization performed by the pentafluorophenyl ester method as described previously (Sheh et al., 1985, 1987, 1990). After deblocking the lysyl-Z group of the peptides, the conjugation was achieved by reaction with the pentafluorophenyl ester of DMQ-MA. The three cyclic peptides exhibited potent cytotoxicity against two solid tumor cell lines (KB and PC-9) under the synergistic activation of L-ascorbic acid. Electron spin resonance (ESR) studies of DMQ-MA and two conjugates showed that massive hydroxyl radicals were generated as a non-linear function of L-ascorbic acid concentration. These studies indicate that the hydroxyl radical is a possible mediator of cytotoxicity for these conjugates and that small-ring-size cyclic peptides are potentially useful carriers of cytotoxic agents.
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Affiliation(s)
- L Sheh
- Department of Chemistry, Tunghai Christian University, Taichung, Taiwan, ROC
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Gaisser TK, Stanev T, Tilav S, Corbato SC, Dai HY, Dawson BR, Elbert JW, Emerson B, Kieda DB, Luo M, Ko S, Larsen C, Loh EC, Salamon MH, Smith JD, Sokolsky P, Sommers P, Tang J, Thomas SB, Bird DJ. Cosmic-ray composition around 10(1)8 eV. Phys Rev D Part Fields 1993; 47:1919-1932. [PMID: 10015774 DOI: 10.1103/physrevd.47.1919] [Citation(s) in RCA: 87] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sheh L, Li CJ, Dai HY, Cheng V, Chiang CD, Shen NK, Yu CY. Cytotoxicity studies on some novel 2,6-dimethoxyhydroquinone derivatives. Anticancer Drug Des 1992; 7:315-27. [PMID: 1324689] [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: 12/26/2022]
Abstract
Six synthetic 2,6-dimethoxyhydroquinone derivatives were shown to have different degrees of cytotoxicity to two human tumor cell lines (KB and PC-9) under the synergistic activation of L-ascorbic acid. Two representative compounds displayed very low time-schedule-independent index, showing that the cytotoxic action is independent of time of drug treatment. The addition of catalase produced a significant inhibitory effect on the cytotoxicity of two representative compounds, indicating that the cytotoxic action is mediated by the generation of H2O2, which may yield hydroxyl radicals via various mechanisms. ESR studies employing the spin-trap 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) showed that massive hydroxyl radicals were generated from four of these drugs as a non-linear function of L-ascorbic acid concentration. The results indicate the possible involvement of hydroxyl radicals in the cytotoxic action of these novel drugs.
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Affiliation(s)
- L Sheh
- Department of Chemistry, Tunghai Christian University, Taichung, Taiwan, Republic of China
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Morrison HL, Dai HY, Pedersen FS, Lenz J. Analysis of the significance of two single-base-pair differences in the SL3-3 and Akv virus long terminal repeats. J Virol 1991; 65:1019-22. [PMID: 1846181 PMCID: PMC239851 DOI: 10.1128/jvi.65.2.1019-1022.1991] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Two single-base-pair differences between the long terminal repeats (LTRs) of the T-lymphomagenic murine retrovirus SL3-3 and nonleukemogenic Akv virus were tested for effects on activity of the LTRs. Evidence was obtained from electrophoretic mobility shift assays for the presence of at least one factor in both T and non-T cells that bound to the region of the viral enhancers that contained the differences. However, no significant differences in activity in expression assays were detected when the two base-pair differences were exchanged between the two LTRs. Therefore, they do not contribute to the higher activity of the SL3-3 LTR in T-lymphoma cell lines.
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Affiliation(s)
- H L Morrison
- Department of Molecular Genetics, Albert Einstein College of Medicine, Bronx, New York 10461
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Dai HY, Etzerodt M, Baekgaard AJ, Lovmand S, Jørgensen P, Kjeldgaard NO, Pedersen FS. Multiple sequence elements in the U3 region of the leukemogenic murine retrovirus SL3-2 contribute to cell-dependent gene expression. Virology 1990; 175:581-5. [PMID: 2158188 DOI: 10.1016/0042-6822(90)90445-w] [Citation(s) in RCA: 12] [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: 12/30/2022]
Abstract
Determination of the U3 sequence of the leukemogenic murine retrovirus SL3-2 revealed close relationships to SL3-3, Akv, and Gross passage A viruses. The SL3-2 and Akv regions showed wide differences in their relative transcriptional activity in four cell lines as determined by U3-driven transient expression assays. The U3 regions of SL3-2 and SL3-3 gave rise to similar but not identical levels of expression. Deletion mapping of the SL3-2 U3 region points to several determinants of expression of different relative importance in the cell lines tested.
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Affiliation(s)
- H Y Dai
- Department of Molecular Biology and Plant Physiology, University of Aarhus, Denmark
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Paludan K, Dai HY, Duch M, Jørgensen P, Kjeldgaard NO, Pedersen FS. Different relative expression from two murine leukemia virus long terminal repeats in unintegrated transfected DNA and in integrated retroviral vector proviruses. J Virol 1989; 63:5201-7. [PMID: 2555551 PMCID: PMC251184 DOI: 10.1128/jvi.63.12.5201-5207.1989] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [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
Results of transient-expression studies have suggested a correlation between tissue-specific pathogenicity of murine leukemia viruses and the relative transcriptional activities of their long terminal repeats in various cell types. To test whether transient-expression ratios are representative of those of integrated proviruses, we developed a system for generation of retroviral transmission vectors differing only in U3. Vectors with the long terminal repeats of leukemogenic SL3-3 and nonleukemogenic Akv viruses were used for infection of a lymphoid cell line. We then compared expression in infected cells with transient expression after DNA transfection. In contrast to a high SL3-3/Akv reporter gene expression ratio in the transient assays, the ratio in stably infected populations was low. Sets of random cell clones from the two infected populations showed wide variation, with a mean value ratio identical to the population ratio but a considerably higher ratio between lowest values. We suggest that the lower expression levels, like transient expression, reflect inherent enhancer strength and that the higher levels represent chromosomal influence. The different pathogenicity, despite the moderate difference in average expression, may then relate to a different capacity for insertional oncogene activation owing to the different inherent enhancer strengths revealed by the transient-expression assays and the least active proviruses.
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Affiliation(s)
- K Paludan
- Department of Molecular Biology and Plant Physiology, University of Aarhus, Denmark
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