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Grebstad Tune B, Sareen H, Powter B, Kahana-Edwin S, Cooper A, Koh ES, Lee CS, Po JW, McCowage G, Dexter M, Cain L, O'Neill G, Prior V, Karpelowsky J, Tsoli M, Baumbusch LO, Ziegler D, Roberts TL, DeSouza P, Becker TM, Ma Y. From Pediatric to Adult Brain Cancer: Exploring Histone H3 Mutations in Australian Brain Cancer Patients. Biomedicines 2023; 11:2907. [PMID: 38001908 PMCID: PMC10669073 DOI: 10.3390/biomedicines11112907] [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: 09/29/2023] [Revised: 10/14/2023] [Accepted: 10/19/2023] [Indexed: 11/26/2023] Open
Abstract
Genetic histone variants have been implicated in cancer development and progression. Mutations affecting the histone 3 (H3) family, H3.1 (encoded by HIST1H3B and HIST1H3C) and H3.3 (encoded by H3F3A), are mainly associated with pediatric brain cancers. While considered poor prognostic brain cancer biomarkers in children, more recent studies have reported H3 alterations in adult brain cancer as well. Here, we established reliable droplet digital PCR based assays to detect three histone mutations (H3.3-K27M, H3.3-G34R, and H3.1-K27M) primarily linked to childhood brain cancer. We demonstrate the utility of our assays for sensitively detecting these mutations in cell-free DNA released from cultured diffuse intrinsic pontine glioma (DIPG) cells and in the cerebral spinal fluid of a pediatric patient with DIPG. We further screened tumor tissue DNA from 89 adult patients with glioma and 1 with diffuse hemispheric glioma from Southwestern Sydney, Australia, an ethnically diverse region, for these three mutations. No histone mutations were detected in adult glioma tissue, while H3.3-G34R presence was confirmed in the diffuse hemispheric glioma patient.
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Affiliation(s)
- Benedicte Grebstad Tune
- Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0372 Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, 0318 Oslo, Norway
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
| | - Heena Sareen
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
- South Western Sydney Clinical School, University of New South Wales, Goulburn St, Liverpool, NSW 2170, Australia
| | - Branka Powter
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
| | - Smadar Kahana-Edwin
- Children's Cancer Research Unit, Kids Research, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia
| | - Adam Cooper
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
| | - Eng-Siew Koh
- South Western Sydney Clinical School, University of New South Wales, Goulburn St, Liverpool, NSW 2170, Australia
- Department of Radiation Oncology, Liverpool Hospital, Liverpool, NSW 2170, Australia
| | - Cheok S Lee
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
- Department of Radiation Oncology, Liverpool Hospital, Liverpool, NSW 2170, Australia
| | - Joseph W Po
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
| | - Geoff McCowage
- Cancer Centre for Children, The Children Hospital at Westmead, Westmead, NSW 2145, Australia
| | - Mark Dexter
- Neurosurgery, The Children Hospital at Westmead, Westmead, NSW 2145, Australia
| | - Lucy Cain
- Cancer Centre for Children, The Children Hospital at Westmead, Westmead, NSW 2145, Australia
| | - Geraldine O'Neill
- Children's Cancer Research Unit, Kids Research, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia
- The University of Sydney Children's Hospital Westmead Clinical School, Faculty of Medicine & Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Victoria Prior
- Children's Cancer Research Unit, Kids Research, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia
- The University of Sydney Children's Hospital Westmead Clinical School, Faculty of Medicine & Health, The University of Sydney, Westmead, NSW 2145, Australia
| | - Jonathan Karpelowsky
- Children's Cancer Research Unit, Kids Research, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia
- Paediatric Oncology and Thoracic Surgery, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia
- Division of Child and Adolescent Health, The University of Sydney, Camperdown, NSW 2050, Australia
| | - Maria Tsoli
- Children's Cancer Institute, Randwick, NSW 2031, Australia
| | - Lars O Baumbusch
- Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0372 Oslo, Norway
- Faculty of Health, Welfare and Organization, Østfold University College, 1757 Halden, Norway
| | - David Ziegler
- Children's Cancer Institute, Randwick, NSW 2031, Australia
- Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW 2052, Australia
- School of Clinical Medicine, UNSW Medicine & Health, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Tara L Roberts
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
- South Western Sydney Clinical School, University of New South Wales, Goulburn St, Liverpool, NSW 2170, Australia
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
| | - Paul DeSouza
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
| | - Therese M Becker
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
- South Western Sydney Clinical School, University of New South Wales, Goulburn St, Liverpool, NSW 2170, Australia
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
| | - Yafeng Ma
- Centre for Circulating Tumour Cell Diagnostics and Research, Ingham Institute for Applied Medical Research, 1 Campbell St, Liverpool, NSW 2170, Australia
- South Western Sydney Clinical School, University of New South Wales, Goulburn St, Liverpool, NSW 2170, Australia
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
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2
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Hermansen JU, Wojcik DM, Robinson N, Pahnke J, Haugland HK, Jamtøy AH, Flægstad T, Halvorsen H, Lund B, Baumbusch LO, Munthe‐Kaas MC. The Norwegian childhood cancer biobank. Cancer Rep (Hoboken) 2021; 5:e1555. [PMID: 34541832 PMCID: PMC9351664 DOI: 10.1002/cnr2.1555] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 07/30/2021] [Accepted: 09/01/2021] [Indexed: 12/04/2022] Open
Abstract
Background The rapidly expanding era of “omics” research is highly dependent on the availability of quality‐proven biological material, especially for rare conditions such as pediatric malignancies. Professional biobanks provide such material, focusing on standardized collection and handling procedures, distinctive quality measurements, traceability of storage conditions, and accessibility. For pediatric malignancies, traditional tumor biobanking is challenging due to the rareness and limited amount of tissue and blood samples. The higher molecular heterogeneity, lower mutation rates, and unique genomic landscapes, however, renders biobanking of this tissue even more crucial. Aim The aim of this study was to test and establish methods for a prospective and centralized biobank for infants, children, and adolescents up to 18 years of age diagnosed with cancer in Norway. Methods Obtain judicial and ethical approvals and administration through a consortium, steering committee, and advisory board. Develop pipelines including SOPs for all aspects in the biobank process, including collection, processing and storing of samples and data, as well of quality controlling, safeguarding, distributing, and transport. Results The childhood cancer biobanking started at Oslo University Hospital in March 2017 and was from 2019 run as a national Norwegian Childhood Cancer Biobank. Informed consent and biological samples are collected regionally and stored centrally. Approximately 12 000 samples from 510 patients and have been included by January 1, 2021, representing a 96% consent and participation rate among our newly diagnosed patients. Conclusion A well‐functioning nationwide collection and centralized biobank with standardized procedures and national storage for pediatric malignancies has been established with a high acceptance among families.
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Affiliation(s)
- Johanne U. Hermansen
- Department of Oncology, Division of Pediatric and Adolescent MedicineOslo University Hospital RikshospitaletOsloNorway
- Department of Pediatric Research, Division of Pediatric and Adolescent MedicineOslo University Hospital RikshospitaletOsloNorway
| | - Dorota M. Wojcik
- Department of PediatricsHaukeland University HospitalBergenNorway
| | - Nina Robinson
- Department of Oncology, Division of Pediatric and Adolescent MedicineOslo University Hospital RikshospitaletOsloNorway
| | - Jens Pahnke
- Department of Pathology, Section for NeuropathologyOslo University HospitalOsloNorway
- Department of Pathology, Faculty of MedicineUniversity of OsloOsloNorway
- Department of Pharmacology, Medical FacultyUniversity of LatviaRigaLatvia
| | | | | | - Trond Flægstad
- Department of PediatricsUniversity Hospital of North‐NorwayTromsøNorway
- Faculty of Health ScienceThe Arctic University of NorwayTromsøNorway
| | - Hanne Halvorsen
- Department of PathologyUniversity Hospital of North‐NorwayTromsøNorway
| | - Bendik Lund
- Department of PediatricsSt. Olavs HospitalTrondheimNorway
- Faculty of Medicine and Health Sciences, Department of Clinical and Molecular MedicineNTNUTrondheimNorway
| | - Lars O. Baumbusch
- Department of Pediatric Research, Division of Pediatric and Adolescent MedicineOslo University Hospital RikshospitaletOsloNorway
| | - Monica C. Munthe‐Kaas
- Department of Oncology, Division of Pediatric and Adolescent MedicineOslo University Hospital RikshospitaletOsloNorway
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3
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Zasada M, Madetko-Talowska A, Revhaug C, Rognlien AGW, Baumbusch LO, Książek T, Szewczyk K, Grabowska A, Bik-Multanowski M, Józef Pietrzyk J, Kwinta P, Didrik Saugstad O. Transcriptome analysis reveals dysregulation of genes involved in oxidative phosphorylation in a murine model of retinopathy of prematurity. Pediatr Res 2020; 88:391-397. [PMID: 32053824 DOI: 10.1038/s41390-020-0793-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 12/22/2019] [Accepted: 01/22/2020] [Indexed: 11/09/2022]
Abstract
BACKGROUND Retinal gene expression pattern is severely altered after exposition to hyperoxia in mice with oxygen-induced retinopathy (OIR), a common model of retinopathy of prematurity. Gene ontology and signaling pathway analyses may add new insights into a better understanding of the pathogenesis of this disease. METHODS Seven-day-old C57BL/6J mice (n = 60) were exposed to 75% oxygen for 5 days and then recovered in room air. The controls (n = 60) were kept in the normoxic conditions. Retinas were harvested immediately following hyperoxia, during the phase of maximal neovascularization, and at the time of neovascularization regression. The retinal RNA samples were evaluated for gene expression using mouse gene expression microarrays. DAVID annotation tools were used for gene ontology and pathway analyses. RESULTS The most significantly enriched signaling pathways during the neovascularization phase of OIR were: focal adhesion; ECM-receptor interaction; PI3K-Akt; oxidative phosphorylation; and Alzheimer's, Parkinson's and Huntington's disease signaling pathways. Genes involved in apoptosis, cell proliferation, cell differentiation, and immune responses were associated with neovascularization regression. CONCLUSIONS Performed analyses revealed the possible involvement of various signaling pathways in OIR pathomechanism, mostly specific to the OIR phase. Dysregulation of genes involved in oxidative phosphorylation may have an impact on neovascularization development.
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Affiliation(s)
- Magdalena Zasada
- Department of Paediatrics, Jagiellonian University Medical College, Krakow, Poland
| | - Anna Madetko-Talowska
- Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Cecilie Revhaug
- Department of Paediatric Research, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Anne Gro W Rognlien
- Department of Paediatric Research, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Lars O Baumbusch
- Department of Paediatric Research, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Teofila Książek
- Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Katarzyna Szewczyk
- Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Agnieszka Grabowska
- Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | | | - Jacek Józef Pietrzyk
- Department of Paediatrics, Jagiellonian University Medical College, Krakow, Poland
| | - Przemko Kwinta
- Department of Paediatrics, Jagiellonian University Medical College, Krakow, Poland.
| | - Ola Didrik Saugstad
- Department of Paediatric Research, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
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4
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Zasada M, Madetko-Talowska A, Revhaug C, Rognlien AGW, Baumbusch LO, Książek T, Szewczyk K, Grabowska A, Bik-Multanowski M, Józef Pietrzyk J, Kwinta P, Saugstad OD. Short- and long-term impact of hyperoxia on the blood and retinal cells' transcriptome in a mouse model of oxygen-induced retinopathy. Pediatr Res 2020; 87:485-493. [PMID: 31578039 PMCID: PMC7033041 DOI: 10.1038/s41390-019-0598-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 09/04/2019] [Accepted: 09/06/2019] [Indexed: 01/25/2023]
Abstract
BACKGROUND We aimed to identify global blood and retinal gene expression patterns in murine oxygen-induced retinopathy (OIR), a common model of retinopathy of prematurity, which may allow better understanding of the pathogenesis of this severe ocular prematurity complication and identification of potential blood biomarkers. METHODS A total of 120 C57BL/6J mice were randomly divided into an OIR group, in which 7-day-old pups were maintained in 75% oxygen for 5 days, or a control group. RNA was extracted from the whole-blood mononuclear cells and retinal cells on days 12, 17, and 28. Gene expression in the RNA samples was evaluated with mouse gene expression microarrays. RESULTS There were 38, 1370 and 111 genes, the expression of which differed between the OIR and control retinas on days 12, 17, and 28, respectively. Gene expression in the blood mononuclear cells was significantly altered only on day 17. Deptor and Nol4 genes showed reduced expression both in the blood and retinal cells on day 17. CONCLUSION There are sustained marked changes in the global pattern of gene expression in the OIR mice retinas. An altered expression of Deptor and Nol4 genes in the blood mononuclear cells requires further investigation as they may indicate retinal neovascularization.
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Affiliation(s)
- Magdalena Zasada
- 0000 0001 2162 9631grid.5522.0Department of Paediatrics, Jagiellonian University Medical College, Krakow, Poland
| | - Anna Madetko-Talowska
- 0000 0001 2162 9631grid.5522.0Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Cecilie Revhaug
- 0000 0004 0389 8485grid.55325.34Department of Paediatric Research, Oslo University Hospital Rikshospitalet, Oslo, Norway ,0000 0004 1936 8921grid.5510.1University of Oslo, Oslo, Norway
| | - Anne Gro W. Rognlien
- 0000 0004 0389 8485grid.55325.34Department of Paediatric Research, Oslo University Hospital Rikshospitalet, Oslo, Norway ,0000 0004 1936 8921grid.5510.1University of Oslo, Oslo, Norway
| | - Lars O. Baumbusch
- 0000 0004 0389 8485grid.55325.34Department of Paediatric Research, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Teofila Książek
- 0000 0001 2162 9631grid.5522.0Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Katarzyna Szewczyk
- 0000 0001 2162 9631grid.5522.0Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Agnieszka Grabowska
- 0000 0001 2162 9631grid.5522.0Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Miroslaw Bik-Multanowski
- 0000 0001 2162 9631grid.5522.0Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Jacek Józef Pietrzyk
- 0000 0001 2162 9631grid.5522.0Department of Paediatrics, Jagiellonian University Medical College, Krakow, Poland
| | - Przemko Kwinta
- Department of Paediatrics, Jagiellonian University Medical College, Krakow, Poland.
| | - Ola Didrik Saugstad
- 0000 0004 0389 8485grid.55325.34Department of Paediatric Research, Oslo University Hospital Rikshospitalet, Oslo, Norway ,0000 0004 1936 8921grid.5510.1University of Oslo, Oslo, Norway
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5
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Zasada M, Suski M, Bokiniec R, Szwarc-Duma M, Borszewska-Kornacka MK, Madej J, Bujak-Giżycka B, Madetko-Talowska A, Revhaug C, Baumbusch LO, Saugstad OD, Pietrzyk JJ, Kwinta P. Comparative two time-point proteome analysis of the plasma from preterm infants with and without bronchopulmonary dysplasia. Ital J Pediatr 2019; 45:112. [PMID: 31445514 PMCID: PMC6708124 DOI: 10.1186/s13052-019-0676-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 07/05/2019] [Indexed: 11/10/2022] Open
Abstract
Background In this study, we aimed to analyze differences in plasma protein abundances between infants with and without bronchopulmonary dysplasia (BPD), to add new insights into a better understanding of the pathogenesis of this disease. Methods Cord and peripheral blood of neonates (≤ 30 weeks gestational age) was drawn at birth and at the 36th postmenstrual week (36 PMA), respectively. Blood samples were retrospectively subdivided into BPD(+) and BPD(−) groups, according to the development of BPD. Results Children with BPD were characterized by decreased afamin, gelsolin and carboxypeptidase N subunit 2 levels in cord blood, and decreased galectin-3 binding protein and hemoglobin subunit gamma-1 levels, as well as an increased serotransferrin abundance in plasma at the 36 PMA. Conclusions BPD development is associated with the plasma proteome changes in preterm infants, adding further evidence for the possible involvement of disturbances in vitamin E availability and impaired immunological processes in the progression of prematurity pulmonary complications. Moreover, it also points to the differences in proteins related to infection resistance and maintaining an adequate level of hematocrit in infants diagnosed with BPD.
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Affiliation(s)
- Magdalena Zasada
- Department of Pediatrics, Jagiellonian University Medical College, Cracow, Poland
| | - Maciej Suski
- Chair of Pharmacology, Jagiellonian University Medical College, Cracow, Poland
| | - Renata Bokiniec
- Neonatal and Intensive Care Department, Medical University of Warsaw, Warsaw, Poland
| | - Monika Szwarc-Duma
- Neonatal and Intensive Care Department, Medical University of Warsaw, Warsaw, Poland
| | | | - Józef Madej
- Chair of Pharmacology, Jagiellonian University Medical College, Cracow, Poland
| | - Beata Bujak-Giżycka
- Chair of Pharmacology, Jagiellonian University Medical College, Cracow, Poland
| | - Anna Madetko-Talowska
- Department of Medical Genetics, Jagiellonian University Medical College, Cracow, Poland
| | - Cecilie Revhaug
- Department of Pediatric Research, Oslo University Hospital, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Lars O Baumbusch
- Department of Pediatric Research, Oslo University Hospital, Oslo, Norway
| | - Ola D Saugstad
- Department of Pediatric Research, Oslo University Hospital, Oslo, Norway. .,University of Oslo, Oslo, Norway.
| | - Jacek Józef Pietrzyk
- Department of Pediatrics, Jagiellonian University Medical College, Cracow, Poland
| | - Przemko Kwinta
- Department of Pediatrics, Jagiellonian University Medical College, Cracow, Poland
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6
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Zasada M, Suski M, Bokiniec R, Szwarc-Duma M, Borszewska-Kornacka MK, Madej J, Bujak-Gizycka B, Madetko-Talowska A, Revhaug C, Baumbusch LO, Saugstad OD, Pietrzyk JJ, Kwinta P. An iTRAQ-Based Quantitative Proteomic Analysis of Plasma Proteins in Preterm Newborns With Retinopathy of Prematurity. Invest Ophthalmol Vis Sci 2019; 59:5312-5319. [PMID: 30398622 DOI: 10.1167/iovs.18-24914] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Retinopathy of prematurity (ROP) is a vision-threatening complication of a premature birth, in which the etiology still remains unclear. Importantly, the molecular processes that govern these effects can be investigated in a perturbed plasma proteome composition. Thus, plasma proteomics may add new insights into a better understanding of the pathogenesis of this disease. Methods The cord and peripheral blood of neonates (≤30 weeks gestational age) was drawn at birth and at the 36th postmenstrual week (PMA), respectively. Blood samples were retrospectively subdivided into ROP(+) and ROP(-) groups, according to the development of ROP. Results The quantitative analysis of plasma proteome at both time points revealed 30 protein abundance changes between ROP(+) and ROP(-) groups. After standardization to gestational age, children who developed ROP were characterized by an increased C3 complement component and fibrinogen level at both analyzed time points. Conclusions Higher levels of the complement C3 component and fibrinogen, present in the cord blood and persistent to 36 PMA, may indicate a chronic low-grade systemic inflammation and hypercoagulable state that may play a role in the development of ROP.
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Affiliation(s)
- Magdalena Zasada
- Department of Pediatrics, Jagiellonian University Medical College, Krakow, Poland
| | - Maciej Suski
- Chair of Pharmacology, Jagiellonian University Medical College, Krakow, Poland
| | - Renata Bokiniec
- Neonatal and Intensive Care Department, Medical University of Warsaw, Warsaw, Poland
| | - Monika Szwarc-Duma
- Neonatal and Intensive Care Department, Medical University of Warsaw, Warsaw, Poland
| | | | - Józef Madej
- Chair of Pharmacology, Jagiellonian University Medical College, Krakow, Poland
| | - Beata Bujak-Gizycka
- Chair of Pharmacology, Jagiellonian University Medical College, Krakow, Poland
| | - Anna Madetko-Talowska
- Department of Medical Genetics, Jagiellonian University Medical College, Krakow, Poland
| | - Cecilie Revhaug
- Department of Pediatric Research, Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Lars O Baumbusch
- Department of Pediatric Research, Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Ola D Saugstad
- Department of Pediatric Research, Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Jacek Józef Pietrzyk
- Department of Pediatrics, Jagiellonian University Medical College, Krakow, Poland
| | - Przemko Kwinta
- Department of Pediatrics, Jagiellonian University Medical College, Krakow, Poland
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7
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Revhaug C, Zasada M, Rognlien AGW, Günther CC, Grabowska A, Książek T, Madetko-Talowska A, Szewczyk K, Bik-Multanowski M, Kwinta P, Pietrzyk JJ, Baumbusch LO, Saugstad OD. Pulmonary vascular disease is evident in gene regulation of experimental bronchopulmonary dysplasia. J Matern Fetal Neonatal Med 2019; 33:2122-2130. [PMID: 30428746 DOI: 10.1080/14767058.2018.1541081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Objective: To examine the gene expression regarding pulmonary vascular disease in experimental bronchopulmonary dysplasia in young mice. Premature delivery puts babies at risk of severe complications. Bronchopulmonary dysplasia (BPD) is a common complication of premature birth leading to lifelong affection of pulmonary function. BPD is recognized as a disease of arrested alveolar development. The disease process is not fully described and no complete cure or prevention is known. The focus of interest in the search for treatment and prevention of BPD has traditionally been at airspace level; however, the pulmonary vasculature is increasingly acknowledged in the pathology of BPD. The aim of the investigation was to study the gene expression in lungs with BPD with regards to pulmonary vascular disease (PVD).Methods: We employed a murine model of hyperoxia-induced BPD and gene expression microarray technique to determine the mRNA expression in lung tissue from young mice. We combined gene expression pathway analysis and analyzed the biological function of multiple single gene transcripts from lung homogenate to study the PVD relevant gene expression.Results: There were n = 117 significantly differentially regulated genes related to PVD through down-regulation of contractile elements, up- and down-regulation of factors involved in vascular tone and tissue-specific genes. Several genes also allowed for pinpointing gene expression differences to the pulmonary vasculature. The gene Nppa coding for a natriuretic peptide, a potent vasodilator, was significantly down-regulated and there was a significant up-regulation of Pde1a (phosphodiesterase 1A), Ptger3 (prostaglandin e receptor 3), and Ptgs1 (prostaglandin-endoperoxide synthase one).Conclusion: The pulmonary vasculature is affected by the arrest of secondary alveolarization as seen by differentially regulated genes involved in vascular tone and pulmonary vasculature suggesting BPD is not purely an airspace disease. Clues to prevention and treatment may lie in the pulmonary vascular system.
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Affiliation(s)
- Cecilie Revhaug
- Department of Pediatric Research, University of Oslo, Oslo, Norway.,Department of Pediatric Research, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Magdalena Zasada
- Department of Pediatrics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Anne Gro W Rognlien
- Department of Pediatric Research, University of Oslo, Oslo, Norway.,Department of Pediatric Research, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | | | - Agnieszka Grabowska
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Teofila Książek
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Anna Madetko-Talowska
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Katarzyna Szewczyk
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Mirolaw Bik-Multanowski
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Przemko Kwinta
- Department of Pediatrics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Jacek J Pietrzyk
- Department of Pediatrics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland.,Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Lars O Baumbusch
- Department of Pediatric Research, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Ola D Saugstad
- Department of Pediatric Research, University of Oslo, Oslo, Norway.,Department of Pediatric Research, Oslo University Hospital, Rikshospitalet, Oslo, Norway
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8
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Revhaug C, Bik-Multanowski M, Zasada M, Rognlien AGW, Günther CC, Ksiązek T, Madetko-Talowska A, Szewczyk K, Grabowska A, Kwinta P, Pietrzyk JJ, Baumbusch LO, Saugstad OD. Immune System Regulation Affected by a Murine Experimental Model of Bronchopulmonary Dysplasia: Genomic and Epigenetic Findings. Neonatology 2019; 116:269-277. [PMID: 31454811 DOI: 10.1159/000501461] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 06/11/2019] [Indexed: 12/27/2022]
Abstract
BACKGROUND Bronchopulmonary dysplasia (BPD) is a common cause of abrupted lung development after preterm birth. BPD may lead to increased rehospitalization, more severe and frequent respiratory infections, and life-long reduced lung function. The gene regulation in lungs with BPD is complex, with various genetic and epigenetic factors involved. OBJECTIVES The aim of this study was to examine the regulatory relation between gene expression and the epigenome (DNA methylation) relevant for the immune system after hyperoxia followed by a recovery period in air using a mouse model of BPD. METHODS Newborn mice pups were subjected to an immediate hyperoxic condition from birth and kept at 85% O2 levels for 14 days followed by a 14-day period in room air. Next, mice lung tissue was used for RNA and DNA extraction with subsequent microarray-based assessment of lung transcriptome and supplementary methylome analysis. RESULTS The immune system-related transcriptomeregulation was affected in mouse lungs after hyperoxia. A high proportion of genes relevant in the immune system exhibited significant expression alterations, e.g., B cell-specific genes central to the cytokine-cytokine receptor interaction, the PI3K-AKT, and the B cell receptor signaling pathways. The findings were accompanied by significant DNA hypermethylation observed in the PI3K-AKT pathway and immune system-relevant genes. CONCLUSIONS Oxygen damage could be partly responsible for the increased susceptibility and abnormal response to respiratory viruses and infections seen in premature babies with BPD through dysregulated genes.
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Affiliation(s)
- Cecilie Revhaug
- Department of Pediatric Research, Oslo University Hospital Rikshospitalet and University of Oslo, Oslo, Norway,
| | - Miroslaw Bik-Multanowski
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Magdalena Zasada
- Department of Pediatrics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Anne Gro W Rognlien
- Department of Pediatric Research, Oslo University Hospital Rikshospitalet and University of Oslo, Oslo, Norway
| | | | - Teofila Ksiązek
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Anna Madetko-Talowska
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Katarzyna Szewczyk
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Agnieszka Grabowska
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Przemko Kwinta
- Department of Pediatrics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Jacek J Pietrzyk
- Department of Medical Genetics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland.,Department of Pediatrics, Institute of Pediatrics, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Lars O Baumbusch
- Department of Pediatric Research, Oslo University Hospital Rikshospitalet and University of Oslo, Oslo, Norway
| | - Ola D Saugstad
- Department of Pediatric Research, Oslo University Hospital Rikshospitalet and University of Oslo, Oslo, Norway
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9
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Kwinta P, Bokiniec R, Bik-Multanowski M, Gunther CC, Grabowska A, Książek T, Madetko-Talowska A, Szewczyk K, Szwarc-Duma M, Borszewska-Kornacka MK, Baumbusch LO, Revhaug C, Saugstad OD, Pietrzyk JJ. Comparison of whole genome expression profile between preterm and full-term newborns. Ginekol Pol 2018; 88:434-441. [PMID: 28930370 DOI: 10.5603/gp.a2017.0080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 08/06/2017] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVES Evaluate the time dependent expression of genes in preterm neonates and verify the influence of ontogenic maturation and the environmental factors on the gene expression after birth. MATERIAL AND METHODS The study was carried out on 20 full-term newborns and 62 preterm newborns (mean birth weight = 1002 [g] (SD: 247), mean gestational age = 27.2 weeks (SD: 1.9)). Blood samples were drawn from all the study participants at birth and at the 36th week postmenstrual age from the preterm group to assess whole genome expression in umbilical cord blood and in peripheral blood leukocytes, respectively. (SurePrint G3 Human Gene Expression v3, 8x60K Microarrays (Agilent)). RESULTS A substantial number of genes was found to be expressed differentially at the time of birth and at 36 PMA in comparison to the term babies with more genes being down-regulated than up-regulated. However, the fold change in the majority of cases was < 2.0. Extremely preterm and very preterm infants were characterized by significantly down-regulated cytokine and chemokine related pathways. The number of down-regulated genes decreased and number of up-regulated genes increased at 36 PMA vs. cord blood. There were no specific gene expression pathway profiles found within the groups of different gestational ages. CONCLUSIONS Preterm delivery is associated with a different gene expression profile in comparison to term delivery. The gene expression profile changes with the maturity of a newborn measured by the gestational age.
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Affiliation(s)
- Przemko Kwinta
- Katedra Pediatrii Klinika Chorób Dzieci Uniwerystet Jagielloński Collegium Medicum, Poland.
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10
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Demeulemeester J, Kumar P, Møller EK, Nord S, Wedge DC, Peterson A, Mathiesen RR, Fjelldal R, Esteki MZ, Theunis K, Gallardo EF, Grundstad J, Borgen E, Baumbusch LO, Børresen-Dale AL, White KP, Kristensen VN, Loo PV, Voet T, Naume B. Abstract 3049: Tracing the origin of disseminated tumor cells in breast cancer using single-cell sequencing. Cancer Res 2017. [DOI: 10.1158/1538-7445.am2017-3049] [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
Background. Single-cell micro-metastases of solid tumors often occur in the bone marrow. These disseminated tumor cells (DTCs) may resist therapy and lay dormant or progress to cause overt bone and visceral metastases. The molecular nature of DTCs remains elusive, as well as when and from where in the tumor they originate. Here, we apply single-cell sequencing to identify and trace the origin of DTCs in breast cancer.
Results. We sequence the genomes of 63 single cells isolated from six non-metastatic breast cancer patients. By comparing the cells’ DNA copy number aberration (CNA) landscapes with those of the primary tumors and lymph node metastasis, we establish that 53% of the single cells morphologically classified as tumor cells are DTCs disseminating from the observed tumor. The remaining cells represent either non-aberrant ‘normal’ cells or ‘aberrant cells of unknown origin’ that have CNA landscapes discordant from the tumor. Further analyses suggest that the prevalence of aberrant cells of unknown origin is age-dependent, and that at least a subset is hematopoietic in origin. Evolutionary reconstruction analysis of bulk tumor and DTC genomes enables ordering of CNA events in molecular pseudo-time and traced the origin of the DTCs to either the main tumor clone, primary tumor subclones, or subclones in an axillary lymph node metastasis.
Conclusions. Single-cell sequencing of bone marrow epithelial-like cells, in parallel with intra-tumor genetic heterogeneity profiling from bulk DNA, is a powerful approach to identify and study DTCs, yielding insight into metastatic processes. A heterogeneous population of CNA-positive cells is present in the bone marrow of non-metastatic breast cancer patients, only part of which are derived from the observed tumor lineages.
Citation Format: Jonas Demeulemeester, Parveen Kumar, Elen K. Møller, Silje Nord, David C. Wedge, April Peterson, Randi R. Mathiesen, Renathe Fjelldal, Masoud Z. Esteki, Koen Theunis, Elia F. Gallardo, Jason Grundstad, Elin Borgen, Lars O. Baumbusch, Anne-Lise Børresen-Dale, Kevin P. White, Vessela N. Kristensen, Peter Van Loo, Thierry Voet, Bjørn Naume. Tracing the origin of disseminated tumor cells in breast cancer using single-cell sequencing [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 3049. doi:10.1158/1538-7445.AM2017-3049
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Affiliation(s)
| | | | | | | | - David C. Wedge
- 4Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | | | | | | | | | - Koen Theunis
- 2KU Leuven – University of Leuven, Leuven, Belgium
| | | | | | | | | | | | | | | | - Peter Van Loo
- 1The Francis Crick Institute, London, United Kingdom
| | - Thierry Voet
- 2KU Leuven – University of Leuven, Leuven, Belgium
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11
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Benterud T, Ystgaard MB, Manueldas S, Pankratov L, Alfaro-Cervello C, Florholmen G, Ahmed MS, Sandvik L, Norgren S, Bjørås M, Baumbusch LO, Solberg R, Saugstad OD. N-Acetylcysteine Amide Exerts Possible Neuroprotective Effects in Newborn Pigs after Perinatal Asphyxia. Neonatology 2017; 111:12-21. [PMID: 27497671 DOI: 10.1159/000447255] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/29/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND Perinatal asphyxia and ensuing reoxygenation change the antioxidant capacity of cells and organs. OBJECTIVES To analyze the neuroprotective effect of the antioxidant N-acetylcysteine amide (NACA) after perinatal hypoxia-reoxygenation with an emphasis on proinflammatory cytokines and the transcription factor NF-κB in the prefrontal cortex of neonatal pigs. METHODS Twenty-nine newborn pigs, aged 12-36 h, were subjected to global hypoxia and hypercapnia. One sham-operated group (n = 5) and 2 experimental groups (n = 12) were exposed to 8% oxygen, until the base excess was -20 mmol/l or the mean arterial blood pressure fell to <20 mm Hg (asphyxia with NACA or saline). The pigs were observed for 9.5 h after hypoxia. Samples of prefrontal cortex and plasma were analyzed. RESULTS Cortex: there was no significant difference in mRNA expression between the intervention groups regarding IL-1β, IL6, TNFα, MMP2, MMP9 or IL18. Pigs exposed to hypoxia-reoxygenation and treatment with NACA (NACA-pigs) had a significantly lower protein concentration of IL-1β than pigs treated with saline (placebo controls), i.e. 8.8 ± 3.9 versus 16.8 ± 10.5 pg/mg protein (p = 0.02). The activation of the transcription factor NF-κB (measured as the fold-change of phosphorylated p65Ser 536), was reduced in the NACA-pigs when compared to the placebo controls (5.2 ± 4.3 vs. 16.0 ± 13.5; p = 0.02). No difference between the intervention groups regarding brain histopathology or in the levels of 8-oxoguanine measured in the prefrontal cortex were observed. Plasma: the NACA-pigs had a stronger reduction of TNFα in the first 30 min following asphyxia compared with the placebo controls, i.e. 36 (30-44) versus 24 (14-32)% (p = 0.01). CONCLUSION The reduced levels of the pivotal inflammatory markers IL-1β and TNFα and the transcription factor NF-κB may indicate that NACA has possible neuroprotective effects after perinatal asphyxia.
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Affiliation(s)
- Torkil Benterud
- Department of Pediatric Research, University of Oslo, Oslo University Hospital, Rikshospitalet, Oslo, Norway
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12
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Garberg HT, Huun MU, Baumbusch LO, Åsegg-Atneosen M, Solberg R, Saugstad OD. Temporal Profile of Circulating microRNAs after Global Hypoxia-Ischemia in Newborn Piglets. Neonatology 2017; 111:133-139. [PMID: 27750254 DOI: 10.1159/000449032] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Accepted: 08/10/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND There is a lack of reliable biomarkers that can identify and grade acute hypoxic-ischemic encephalopathy in newborns. MicroRNAs (miRNA) are short, non-coding strands of RNA that are released into the circulation in response to tissue stress and injury. Some miRNAs are highly tissue specific and thus may potentially be non-invasive biomarkers of neonatal hypoxic-ischemic brain injury. OBJECTIVE The aim of this study was to characterize the temporal expression of selected circulating miRNAs in a clinically relevant piglet model of neonatal hypoxia-ischemia (HI). METHODS A total of 13 anesthetized newborn piglets were randomized to either a control group (n = 5) or transient global HI group (n = 8). HI was achieved by ventilation with 8% oxygen until the point of severe acidosis (arterial base excess ≤-20 mmol/l) and/or hypotension (mean arterial blood pressure ≤20 mm Hg) was reached. Plasma was sampled at baseline, at the end of HI and 0.5, 3.5 and 9.5 h after HI. MiRNA expression was measured by qRT-PCR. RESULTS Compared to baseline, miR-374a increased during HI (p = 0.01), remained elevated at 0.5 h after HI (p = 0.02) and was downregulated at 9.5 h after HI (p = 0.02). MiR-210 increased during HI (p = 0.02) and rapidly normalized by 0.5 h after HI. MiR-124 and miR-125b did not exhibit significant alterations. Correlations were observed between miR-374a, arterial pH, base excess and lactate levels, and between miR-210 and pO2 (p < 0.05). CONCLUSIONS Our data suggest that miR-374a and miR-210 are important regulators in neonatal HI and might have a place as biomarkers in this setting.
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Affiliation(s)
- Håvard Tetlie Garberg
- Division of Pediatric and Adolescent Medicine, Department of Pediatric Research, Oslo University Hospital, Rikshospitalet, Norway
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13
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Demeulemeester J, Kumar P, Møller EK, Nord S, Wedge DC, Peterson A, Mathiesen RR, Fjelldal R, Zamani Esteki M, Theunis K, Fernandez Gallardo E, Grundstad AJ, Borgen E, Baumbusch LO, Børresen-Dale AL, White KP, Kristensen VN, Van Loo P, Voet T, Naume B. Tracing the origin of disseminated tumor cells in breast cancer using single-cell sequencing. Genome Biol 2016; 17:250. [PMID: 27931250 PMCID: PMC5146893 DOI: 10.1186/s13059-016-1109-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 11/15/2016] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Single-cell micro-metastases of solid tumors often occur in the bone marrow. These disseminated tumor cells (DTCs) may resist therapy and lay dormant or progress to cause overt bone and visceral metastases. The molecular nature of DTCs remains elusive, as well as when and from where in the tumor they originate. Here, we apply single-cell sequencing to identify and trace the origin of DTCs in breast cancer. RESULTS We sequence the genomes of 63 single cells isolated from six non-metastatic breast cancer patients. By comparing the cells' DNA copy number aberration (CNA) landscapes with those of the primary tumors and lymph node metastasis, we establish that 53% of the single cells morphologically classified as tumor cells are DTCs disseminating from the observed tumor. The remaining cells represent either non-aberrant "normal" cells or "aberrant cells of unknown origin" that have CNA landscapes discordant from the tumor. Further analyses suggest that the prevalence of aberrant cells of unknown origin is age-dependent and that at least a subset is hematopoietic in origin. Evolutionary reconstruction analysis of bulk tumor and DTC genomes enables ordering of CNA events in molecular pseudo-time and traced the origin of the DTCs to either the main tumor clone, primary tumor subclones, or subclones in an axillary lymph node metastasis. CONCLUSIONS Single-cell sequencing of bone marrow epithelial-like cells, in parallel with intra-tumor genetic heterogeneity profiling from bulk DNA, is a powerful approach to identify and study DTCs, yielding insight into metastatic processes. A heterogeneous population of CNA-positive cells is present in the bone marrow of non-metastatic breast cancer patients, only part of which are derived from the observed tumor lineages.
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Affiliation(s)
- Jonas Demeulemeester
- The Francis Crick Institute, London, UK.,Department of Human Genetics, KU Leuven-University of Leuven, Leuven, Belgium
| | - Parveen Kumar
- Department of Human Genetics, KU Leuven-University of Leuven, Leuven, Belgium.,Single-cell Genomics Centre, Wellcome Trust Sanger Institute, Hinxton, UK
| | - Elen K Møller
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway
| | - Silje Nord
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway
| | - David C Wedge
- Cancer Genome Project, Wellcome Trust Sanger Institute, Hinxton, UK
| | - April Peterson
- Institute for Genomics & Systems Biology and Department of Human Genetics, University of Chicago, Chicago, IL, USA.,Present address: Laboratory of Genetics, University of Wisconsin, Madison, WI, USA
| | - Randi R Mathiesen
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway.,Department of Oncology, Division of Surgery and Cancer Medicine, Oslo University Hospital, Radiumhospitalet, Oslo, Norway.,Present address: Department of Oncology, Akershus University Hospital, Lørenskog, Norway
| | - Renathe Fjelldal
- Department of Pathology, Oslo University Hospital, Radiumhospitalet, Oslo, Norway
| | | | - Koen Theunis
- Department of Human Genetics, KU Leuven-University of Leuven, Leuven, Belgium
| | | | - A Jason Grundstad
- Institute for Genomics & Systems Biology and Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - Elin Borgen
- Department of Pathology, Oslo University Hospital, Radiumhospitalet, Oslo, Norway
| | - Lars O Baumbusch
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway.,Present address: Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Anne-Lise Børresen-Dale
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway
| | - Kevin P White
- Institute for Genomics & Systems Biology and Department of Human Genetics, University of Chicago, Chicago, IL, USA. .,Tempus Labs, Chicago, IL, 60654, USA.
| | - Vessela N Kristensen
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital, Radiumhospitalet, Oslo, Norway. .,Department of Clinical Molecular Biology (EpiGen), Medical Division, Akershus University Hospital, Lørenskog, Norway.
| | - Peter Van Loo
- The Francis Crick Institute, London, UK. .,Department of Human Genetics, KU Leuven-University of Leuven, Leuven, Belgium.
| | - Thierry Voet
- Department of Human Genetics, KU Leuven-University of Leuven, Leuven, Belgium. .,Single-cell Genomics Centre, Wellcome Trust Sanger Institute, Hinxton, UK.
| | - Bjørn Naume
- Department of Oncology, Division of Surgery and Cancer Medicine, Oslo University Hospital, Radiumhospitalet, Oslo, Norway. .,Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
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14
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Kaveh F, Baumbusch LO, Nebdal D, Børresen-Dale AL, Lingjærde OC, Edvardsen H, Kristensen VN, Solvang HK. A systematic comparison of copy number alterations in four types of female cancer. BMC Cancer 2016; 16:913. [PMID: 27876019 PMCID: PMC5120489 DOI: 10.1186/s12885-016-2899-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 10/30/2016] [Indexed: 01/06/2023] Open
Abstract
Background Detection and localization of genomic alterations and breakpoints are crucial in cancer research. The purpose of this study was to investigate, in a methodological and biological perspective, different female, hormone-dependent cancers to identify common and diverse DNA aberrations, genes, and pathways. Methods In this work, we analyzed tissue samples from patients with breast (n = 112), ovarian (n = 74), endometrial (n = 84), or cervical (n = 76) cancer. To identify genomic aberrations, the Circular Binary Segmentation (CBS) and Piecewise Constant Fitting (PCF) algorithms were used and segmentation thresholds optimized. The Genomic Identification of Significant Targets in Cancer (GISTIC) algorithm was applied to the segmented data to identify significantly altered regions and the associated genes were analyzed by Ingenuity Pathway Analysis (IPA) to detect over-represented pathways and functions within the identified gene sets. Results and Discussion Analyses of high-resolution copy number alterations in four different female cancer types are presented. For appropriately adjusted segmentation parameters the two segmentation algorithms CBS and PCF performed similarly. We identified one region at 8q24.3 with focal aberrations that was altered at significant frequency across all four cancer types. Considering both, broad regions and focal peaks, three additional regions with gains at significant frequency were revealed at 1p21.1, 8p22, and 13q21.33, respectively. Several of these events involve known cancer-related genes, like PPP2R2A, PSCA, PTP4A3, and PTK2. In the female reproductive system (ovarian, endometrial, and cervix [OEC]), we discovered three common events: copy number gains at 5p15.33 and 15q11.2, further a copy number loss at 8p21.2. Interestingly, as many as 75% of the aberrations (75% amplifications and 86% deletions) identified by GISTIC were specific for just one cancer type and represented distinct molecular pathways. Conclusions Our results disclose that some prominent copy number changes are shared in the four examined female, hormone-dependent cancer whereas others are definitive to specific cancer types. Electronic supplementary material The online version of this article (doi:10.1186/s12885-016-2899-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fatemeh Kaveh
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, Oslo, Norway.,Medical Genetics Department, Oslo University Hospital Ullevål, Oslo, Norway.,Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Lars O Baumbusch
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, Oslo, Norway.,Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Daniel Nebdal
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, Oslo, Norway
| | - Anne-Lise Børresen-Dale
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, Oslo, Norway
| | - Ole Christian Lingjærde
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, Oslo, Norway.,Department of Computer Science, University of Oslo, Oslo, Norway
| | - Hege Edvardsen
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, Oslo, Norway
| | - Vessela N Kristensen
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, Oslo, Norway. .,Department of Clinical Molecular Biology (EpiGen), Medical Division, Akershus University Hospital, Lørenskog, Norway.
| | - Hiroko K Solvang
- Marine Mammals Research Group, Institute of Marine Research, Bergen, Norway
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15
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Møller E, Kumar P, Nord S, Wedge D, van Loo P, Peterson A, Mathiesen RR, Fjelldal R, Esteki MZ, Grundstad JA, Borgen E, Baumbusch LO, Børresen-Dale AL, White KP, Voet T, Naume B, Kristensen VN. Abstract LB-051: Tumor heterogeneity and dissemination in breast cancer: Deep sequencing of single disseminated cells from bone marrow compared to primary tumor and lymph node metastases. Cancer Res 2015. [DOI: 10.1158/1538-7445.am2015-lb-051] [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
Metastasis is the main cause of death amongst breast cancer patients. Our knowledge of the metastatic cascade and how to inhibit it is limited. Here we dissect the genetic profile of multiple single disseminated tumor cells (DTCs) taken at various time points after diagnosis, and compare them to their matched primary tumors and lymph node metastasis. We have previously published a method for studying CNAs in single DTCs by whole genome sequencing, where we compared two primary breast carcinomas to two corresponding DTCs. Copy number profiles from whole genome sequencing (WGS) from 40 DTCs were analyzed. The single cell whole genome amplified (WGA) DNA was used to generate WGS libraries, and the DTCs were subsequently sequenced on the Illumina HiSeq 2000. The WGS reads were trimmed for WGA adapters and aligned to GRCh37 human reference using Burrows-Wheeler Aligner (BWA). LogR values were calculated for genomic bins and corrected for% GC-bias and segmented using the piecewise constant fitting (PCF) algorithm (the penalty parameter, γ, was set to 25). Copy number was estimated per segment as 2logR × Ψ, where Ψ is the average ploidy. B allele frequency (BAF) was calculated for each known SNP position from dbSNP (dbSNP build 135) and somatic mutations read-outs generated. In this study we compared the mutation spectre and CNAs in six primary tumors, one with corresponding lymph node metastasis and single DTCs. In total, CN profile from 40 DTCs showed evidence of dissemination at both early and late stage of disease progression. At large, the copy number profile of the examined DTCs exhibited either a limited number of alterations, or a pattern similar to the primary tumor and lymph node metastasis suggesting continuous dissemination of single tumor cells throughout the tumor evolution. By demonstrating sub-clonality in the lymph node metastasis we provide novel insight into the metastatic process. Further, the correlation in aberration pattern between the lymph node metastasis and multiple DTCs, implies that cells found in the bone marrow may have originated from the lymph node metastasis. The DTCs exhibited common aberrations typically found in breast carcinomas, and several DTCs had deletion of 16q and17p, and gain of 1q, 8q. Certain DTCs exhibited CNAs not visible in the primary tumor or lymph node including gain of 9q, 14q, 19q and Xq, and loss of 2p, 6p, 8p, 18p and 19p. Two DTCs from time of diagnosis exhibited gain of the whole chromosome 5 that was not observed in the primary tumor or the lymph node. These results reveal the importance of assessing the sub-clonal genetic alterations in the primary tumor, as well as in the lymph node metastasis and DTCs, in order to evaluate patient treatment and prognosis.
Citation Format: Elen Møller, Parveen Kumar, Silje Nord, David Wedge, Peter van Loo, April Peterson, Randi R. Mathiesen, Renathe Fjelldal, Masoud Z. Esteki, Jason A. Grundstad, Elin Borgen, Lars O. Baumbusch, Anne-Lise Børresen-Dale, Kevin P. White, Thierry Voet, Bjørn Naume, Vessela N. Kristensen. Tumor heterogeneity and dissemination in breast cancer: Deep sequencing of single disseminated cells from bone marrow compared to primary tumor and lymph node metastases. [abstract]. In: Proceedings of the 106th Annual Meeting of the American Association for Cancer Research; 2015 Apr 18-22; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Res 2015;75(15 Suppl):Abstract nr LB-051. doi:10.1158/1538-7445.AM2015-LB-051
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Affiliation(s)
- Elen Møller
- 1Institute for Cancer Research, OUS, Oslo, Norway
| | - Parveen Kumar
- 2Centre for Human Genetics, University Hospital Leuven, Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - Silje Nord
- 1Institute for Cancer Research, OUS, Oslo, Norway
| | - David Wedge
- 3Cancer Genome Project, Welcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Peter van Loo
- 4Cancer Research UK London Research Institute, London, United Kingdom
| | - April Peterson
- 5Institute for Genomics & Systems Biology and in the Department of Human Genetics, The University of Chicago, Chicago, IL
| | - Randi R. Mathiesen
- 6Division of Surgery and Cancer Medicine, Department of Oncology, Oslo University Hospital Radiumhospitalet, Oslo, Norway
| | - Renathe Fjelldal
- 7Department of Pathology, Oslo University Hospital Radiumhospitalet, Oslo, Norway
| | - Masoud Z. Esteki
- 2Centre for Human Genetics, University Hospital Leuven, Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - Jason A. Grundstad
- 5Institute for Genomics & Systems Biology and in the Department of Human Genetics, The University of Chicago, Chicago, IL
| | - Elin Borgen
- 7Department of Pathology, Oslo University Hospital Radiumhospitalet, Oslo, Norway
| | | | | | - Kevin P. White
- 5Institute for Genomics & Systems Biology and in the Department of Human Genetics, The University of Chicago, Chicago, IL
| | - Thierry Voet
- 8Single-cell Genomics Centre, Welcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Bjørn Naume
- 6Division of Surgery and Cancer Medicine, Department of Oncology, Oslo University Hospital Radiumhospitalet, Oslo, Norway
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Møller EK, Kumar P, Voet T, Peterson A, Loo PV, Mathiesen R, Fjelldal R, Grundstad J, Borgen E, Baumbusch LO, Naume B, Børresen-Dale AL, Nord S, Kristensen VN. Abstract A72: Next-generation sequencing of disseminated tumor cells. Cancer Res 2015. [DOI: 10.1158/1538-7445.chtme14-a72] [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
Disseminated tumor cells (DTCs) detected in the bone marrow have been shown as an independent prognostic factor for women with breast cancer. However, the mechanisms behind the tumor cell dissemination are still unclear and more detailed knowledge is needed to fully understand why some cells remain dormant and others metastasize. Sequencing of single cells has opened for the possibility to dissect the genetic content of subclones of a primary tumor, as well as DTCs. Previous studies of genetic changes in DTCs have employed single-cell array comparative genomic hybridization which provides information about larger aberrations. To date, next generation sequencing provides the possibility to discover new, smaller and copy neutral genetic changes. In this study, we performed whole genome amplification and subsequently next generation sequencing to analyze DTCs from two breast cancer patients. We compared copy number profiles of the DTCs and the corresponding primary tumor generated from sequencing and SNP-CGH data, respectively. While one tumor revealed mostly whole arm gains and losses, the other had more complex alterations, as well as subclonal amplification and deletions. Whole arm gains or losses in the primary tumor were in general also observed in the corresponding DTC. Both primary tumors showed amplification of chromosome 1q and deletion of parts of chromosome 16q, which was recaptured in the corresponding DTCs. Interestingly, clear differences were also observed, indicating that the DTC underwent further evolution at the copy number level. This study provides a proof-of-principle for sequencing of DTCs and correlation with primary copy number profiles. The analyses allow insight into tumor cell dissemination and show ongoing copy number evolution in DTCs compared to the primary tumors.
Note: This abstract was not presented at the conference.
Citation Format: Elen K. Møller, Parveen Kumar, Thierry Voet, April Peterson, Peter Van Loo, Randi Mathiesen, Renate Fjelldal, Jason Grundstad, Elin Borgen, Lars O. Baumbusch, Bjørn Naume, Anne-Lise Børresen-Dale, Silje Nord, Vessela N. Kristensen. Next-generation sequencing of disseminated tumor cells. [abstract]. In: Abstracts: AACR Special Conference on Cellular Heterogeneity in the Tumor Microenvironment; 2014 Feb 26-Mar 1; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2015;75(1 Suppl):Abstract nr A72. doi:10.1158/1538-7445.CHTME14-A72
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Affiliation(s)
- Elen K. Møller
- 12K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, Oslo, Norway,
| | - Parveen Kumar
- 23Centre for Human Genetics, University Hospital Leuven, Department of Human Genetics, KU Leuven, Leuven, Norway,
| | - Thierry Voet
- 3Single-cell Genomics Centre, Welcome Trust Sanger Institute, Hinxton,, United Kingdom,
| | - April Peterson
- 4Institute for Genomics & Systems Biology and in the Department of Human Genetics,, Chicago, IL,
| | - Peter Van Loo
- 5Department of Human Genetics, VIB and KU Leuven, Leuven, Belgium,
| | - Randi Mathiesen
- 6Division of Surgery and Cancer Medicine, Department of Oncology, Oslo University Hospital Radium, Oslo, Norway,
| | - Renate Fjelldal
- 7Department of Pathology, Oslo University Hospital Radiumhospitalet,, Oslo, Norway,
| | - Jason Grundstad
- 4Institute for Genomics & Systems Biology and in the Department of Human Genetics,, Chicago, IL,
| | - Elin Borgen
- 7Department of Pathology, Oslo University Hospital Radiumhospitalet,, Oslo, Norway,
| | - Lars O. Baumbusch
- 12K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, Oslo, Norway,
| | - Bjørn Naume
- 6Division of Surgery and Cancer Medicine, Department of Oncology, Oslo University Hospital Radium, Oslo, Norway,
| | - Anne-Lise Børresen-Dale
- 12K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, Oslo, Norway,
| | - Silje Nord
- 12K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, Oslo, Norway,
| | - Vessela N. Kristensen
- 8Department of Clinical Molecular Biology (EpiGen), Medical Division, Akershus University Hospital, Oslo, Norway
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17
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Møller EK, Kumar P, Voet T, Peterson A, Van Loo P, Mathiesen RR, Fjelldal R, Grundstad J, Borgen E, Baumbusch LO, Naume B, Børresen-Dale AL, White KP, Nord S, Kristensen VN. Next-generation sequencing of disseminated tumor cells. Front Oncol 2013; 3:320. [PMID: 24427740 PMCID: PMC3876274 DOI: 10.3389/fonc.2013.00320] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 12/16/2013] [Indexed: 12/19/2022] Open
Abstract
Disseminated tumor cells (DTCs) detected in the bone marrow have been shown as an independent prognostic factor for women with breast cancer. However, the mechanisms behind the tumor cell dissemination are still unclear and more detailed knowledge is needed to fully understand why some cells remain dormant and others metastasize. Sequencing of single cells has opened for the possibility to dissect the genetic content of subclones of a primary tumor, as well as DTCs. Previous studies of genetic changes in DTCs have employed single-cell array comparative genomic hybridization which provides information about larger aberrations. To date, next-generation sequencing provides the possibility to discover new, smaller, and copy neutral genetic changes. In this study, we performed whole-genome amplification and subsequently next-generation sequencing to analyze DTCs from two breast cancer patients. We compared copy-number profiles of the DTCs and the corresponding primary tumor generated from sequencing and SNP-comparative genomic hybridization (CGH) data, respectively. While one tumor revealed mostly whole-arm gains and losses, the other had more complex alterations, as well as subclonal amplification and deletions. Whole-arm gains or losses in the primary tumor were in general also observed in the corresponding DTC. Both primary tumors showed amplification of chromosome 1q and deletion of parts of chromosome 16q, which was recaptured in the corresponding DTCs. Interestingly, clear differences were also observed, indicating that the DTC underwent further evolution at the copy-number level. This study provides a proof-of-principle for sequencing of DTCs and correlation with primary copy-number profiles. The analyses allow insight into tumor cell dissemination and show ongoing copy-number evolution in DTCs compared to the primary tumors.
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Affiliation(s)
- Elen K Møller
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet , Oslo , Norway ; K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, University of Oslo , Oslo , Norway
| | - Parveen Kumar
- Centre for Human Genetics, Department of Human Genetics, University Hospital Leuven, KU Leuven , Leuven , Belgium
| | - Thierry Voet
- Centre for Human Genetics, Department of Human Genetics, University Hospital Leuven, KU Leuven , Leuven , Belgium ; Single-Cell Genomics Centre, Wellcome Trust Sanger Institute , Hinxton , UK
| | - April Peterson
- Institute for Genomics and Systems Biology, Department of Human Genetics, The University of Chicago , Chicago, IL , USA
| | - Peter Van Loo
- Cancer Genome Project, Wellcome Trust Sanger Institute , Hinxton , UK ; Department of Human Genetics, VIB and KU Leuven , Leuven , Belgium
| | - Randi R Mathiesen
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet , Oslo , Norway ; Department of Oncology, Division of Surgery and Cancer Medicine, Oslo University Hospital Radiumhospitalet , Oslo , Norway
| | - Renathe Fjelldal
- Department of Pathology, Oslo University Hospital Radiumhospitalet , Oslo , Norway
| | - Jason Grundstad
- Institute for Genomics and Systems Biology, Department of Human Genetics, The University of Chicago , Chicago, IL , USA
| | - Elin Borgen
- Department of Pathology, Oslo University Hospital Radiumhospitalet , Oslo , Norway
| | - Lars O Baumbusch
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet , Oslo , Norway ; K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, University of Oslo , Oslo , Norway
| | - Bjørn Naume
- K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, University of Oslo , Oslo , Norway ; Department of Oncology, Division of Surgery and Cancer Medicine, Oslo University Hospital Radiumhospitalet , Oslo , Norway ; Institute for Clinical Medicine, Faculty of Medicine, University of Oslo , Oslo , Norway
| | - Anne-Lise Børresen-Dale
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet , Oslo , Norway ; K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, University of Oslo , Oslo , Norway
| | - Kevin P White
- Institute for Genomics and Systems Biology, Department of Human Genetics, The University of Chicago , Chicago, IL , USA
| | - Silje Nord
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet , Oslo , Norway ; K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, University of Oslo , Oslo , Norway
| | - Vessela N Kristensen
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet , Oslo , Norway ; K.G. Jebsen Center for Breast Cancer Research, Institute for Clinical Medicine, Faculty of Medicine, University of Oslo , Oslo , Norway ; Department of Clinical Molecular Biology (EpiGen), Medical Division, Akershus University Hospital , Lørenskog , Norway
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Baumbusch LO, Helland Å, Wang Y, Liestøl K, Schaner ME, Holm R, Etemadmoghadam D, Alsop K, Brown P, Mitchell G, Fereday S, DeFazio A, Bowtell DDL, Kristensen GB, Lingjærde OC, Børresen-Dale AL. High levels of genomic aberrations in serous ovarian cancers are associated with better survival. PLoS One 2013; 8:e54356. [PMID: 23372714 PMCID: PMC3553118 DOI: 10.1371/journal.pone.0054356] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 12/11/2012] [Indexed: 01/31/2023] Open
Abstract
Genomic instability and copy number alterations in cancer are generally associated with poor prognosis; however, recent studies have suggested that extreme levels of genomic aberrations may be beneficial for the survival outcome for patients with specific tumour types. We investigated the extent of genomic instability in predominantly high-grade serous ovarian cancers (SOC) using two independent datasets, generated in Norway (n = 74) and Australia (n = 70), respectively. Genomic instability was quantified by the Total Aberration Index (TAI), a measure of the abundance and genomic size of copy number changes in a tumour. In the Norwegian cohort, patients with TAI above the median revealed significantly prolonged overall survival (p<0.001) and progression-free survival (p<0.05). In the Australian cohort, patients with above median TAI showed prolonged overall survival (p<0.05) and moderately, but not significantly, prolonged progression-free survival. Results were confirmed by univariate and multivariate Cox regression analyses with TAI as a continuous variable. Our results provide further evidence supporting an association between high level of genomic instability and prolonged survival of high-grade SOC patients, possibly as disturbed genome integrity may lead to increased sensitivity to chemotherapeutic agents.
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Affiliation(s)
- Lars O Baumbusch
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital, The Norwegian Radium Hospital, Oslo, Norway.
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19
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Nilsen G, Liestøl K, Van Loo P, Moen Vollan HK, Eide MB, Rueda OM, Chin SF, Russell R, Baumbusch LO, Caldas C, Børresen-Dale AL, Lingjaerde OC. Copynumber: Efficient algorithms for single- and multi-track copy number segmentation. BMC Genomics 2012; 13:591. [PMID: 23442169 PMCID: PMC3582591 DOI: 10.1186/1471-2164-13-591] [Citation(s) in RCA: 191] [Impact Index Per Article: 15.9] [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: 05/16/2012] [Accepted: 10/15/2012] [Indexed: 12/15/2022] Open
Abstract
Background Cancer progression is associated with genomic instability and an accumulation of gains and losses of DNA. The growing variety of tools for measuring genomic copy numbers, including various types of array-CGH, SNP arrays and high-throughput sequencing, calls for a coherent framework offering unified and consistent handling of single- and multi-track segmentation problems. In addition, there is a demand for highly computationally efficient segmentation algorithms, due to the emergence of very high density scans of copy number. Results A comprehensive Bioconductor package for copy number analysis is presented. The package offers a unified framework for single sample, multi-sample and multi-track segmentation and is based on statistically sound penalized least squares principles. Conditional on the number of breakpoints, the estimates are optimal in the least squares sense. A novel and computationally highly efficient algorithm is proposed that utilizes vector-based operations in R. Three case studies are presented. Conclusions The R package copynumber is a software suite for segmentation of single- and multi-track copy number data using algorithms based on coherent least squares principles.
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Affiliation(s)
- Gro Nilsen
- Biomedical Informatics, Dept of Informatics, University of Oslo, Oslo, Norway
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20
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Otto B, Gruner K, Heinlein C, Wegwitz F, Nollau P, Ylstra B, Pantel K, Schumacher U, Baumbusch LO, Martin-Subero JI, Siebert R, Wagener C, Streichert T, Deppert W, Tolstonog GV. Low-grade and high-grade mammary carcinomas in WAP-T transgenic mice are independent entities distinguished by Met expression. Int J Cancer 2012; 132:1300-10. [DOI: 10.1002/ijc.27783] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 08/03/2012] [Indexed: 12/15/2022]
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21
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Mathiesen RR, Fjelldal R, Liestøl K, Due EU, Geigl JB, Riethdorf S, Borgen E, Rye IH, Schneider IJ, Obenauf AC, Mauermann O, Nilsen G, Christian Lingjaerde O, Børresen-Dale AL, Pantel K, Speicher MR, Naume B, Baumbusch LO. High-resolution analyses of copy number changes in disseminated tumor cells of patients with breast cancer. Int J Cancer 2011; 131:E405-15. [PMID: 21935921 DOI: 10.1002/ijc.26444] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Accepted: 09/02/2011] [Indexed: 12/13/2022]
Abstract
The presence of disseminated tumor cells (DTCs) in bone marrow (BM) identifies breast cancer patients with less favorable outcome. Furthermore, molecular characterization is required to investigate the malignant potential of these cells. This study presents a single-cell array comparative genomic hybridization (SCaCGH) method providing molecular analysis of immunomorphologically detected DTCs. The resolution limit of the method was estimated using the cancer cell line SK-BR-3 on 44 and 244k arrays. The technique was further tested on 28 circulating tumor cells and four hematopoietic cells (HCs) from peripheral blood (n = 8 patients). The SCaCGH method was finally applied to 24 DTCs, three immunopositive cells morphologically classified as probable HCs from breast cancer patients and five HC controls from BM (n = 7 patients plus n = 1 healthy donor). The frequency of copy number changes of the DTCs revealed similarities with primary breast tumor samples. Three of the patients had available profiles for DTCs and the corresponding tumor tissue from primary surgery. More than two-third of the analyzed DTCs disclosed equivalent changes, both to each other and to the corresponding primary disease, whereas the rest of the cells showed balanced profiles. The probable HCs revealed either balanced profiles (n = 2) or changes comparable to the tumor tissue and DTCs (n = 1), indicating morphological overlap between HCs and DTCs. Similar aberration patterns were visible in DTCs collected at diagnosis and at 3 years relapse-free follow-up. SCaCGH may be a powerful tool for the molecular characterization of DTCs.
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Affiliation(s)
- Randi R Mathiesen
- Department of Genetics, Oslo University Hospital Radiumhospitalet, Oslo, Norway
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22
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Molloy TJ, Bosma AJ, Baumbusch LO, Synnestvedt M, Borgen E, Russnes HG, Schlichting E, van't Veer LJ, Naume B. The prognostic significance of tumour cell detection in the peripheral blood versus the bone marrow in 733 early-stage breast cancer patients. Breast Cancer Res 2011; 13:R61. [PMID: 21672237 PMCID: PMC3218950 DOI: 10.1186/bcr2898] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [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: 02/09/2011] [Revised: 05/04/2011] [Accepted: 06/14/2011] [Indexed: 11/25/2022] Open
Abstract
Introduction The detection of circulating tumour cells (CTCs) in the peripheral blood and disseminated tumour cells (DTCs) in the bone marrow are promising prognostic tools for risk stratification in early breast cancer. There is, however, a need for further validation of these techniques in larger patient cohorts with adequate follow-up periods. Methods We assayed CTCs and DTCs at primary surgery in 733 stage I or II breast cancer patients with a median follow-up time of 7.6 years. CTCs were detected in samples of peripheral blood mononuclear cells previously stored in liquid-nitrogen using a previously-developed multi-marker quantitative PCR (QPCR)-based assay. DTCs were detected in bone marrow samples by immunocytochemical analysis using anti-cytokeratin antibodies. Results CTCs were detected in 7.9% of patients, while DTCs were found in 11.7%. Both CTC and DTC positivity predicted poor metastasis-free survival (MFS) and breast cancer-specific survival (BCSS); MFS hazard ratio (HR) = 2.4 (P < 0.001)/1.9 (P = 0.006), and BCSS HR = 2.5 (P < 0.001)/2.3 (P = 0.01), for CTC/DTC status, respectively). Multivariate analyses demonstrated that CTC status was an independent prognostic variable for both MFS and BCSS. CTC status also identified a subset of patients with significantly poorer outcome among low-risk node negative patients that did not receive adjuvant systemic therapy (MFS HR 2.3 (P = 0.039), BCSS HR 2.9 (P = 0.017)). Using both tests provided increased prognostic information and indicated different relevance within biologically dissimilar breast cancer subtypes. Conclusions These results support the use of CTC analysis in early breast cancer to generate clinically useful prognostic information.
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Affiliation(s)
- Timothy J Molloy
- Division of Experimental Therapy, The Netherlands Cancer Institute, Amsterdam, The Netherlands
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23
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Russnes HG, Vollan HKM, Lingjærde OC, Krasnitz A, Lundin P, Naume B, Sørlie T, Borgen E, Rye IH, Langerød A, Chin SF, Teschendorff AE, Stephens PJ, Månér S, Schlichting E, Baumbusch LO, Kåresen R, Stratton MP, Wigler M, Caldas C, Zetterberg A, Hicks J, Børresen-Dale AL. Genomic architecture characterizes tumor progression paths and fate in breast cancer patients. Sci Transl Med 2011; 2:38ra47. [PMID: 20592421 DOI: 10.1126/scitranslmed.3000611] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Distinct molecular subtypes of breast carcinomas have been identified, but translation into clinical use has been limited. We have developed two platform-independent algorithms to explore genomic architectural distortion using array comparative genomic hybridization data to measure (i) whole-arm gains and losses [whole-arm aberration index (WAAI)] and (ii) complex rearrangements [complex arm aberration index (CAAI)]. By applying CAAI and WAAI to data from 595 breast cancer patients, we were able to separate the cases into eight subgroups with different distributions of genomic distortion. Within each subgroup data from expression analyses, sequencing and ploidy indicated that progression occurs along separate paths into more complex genotypes. Histological grade had prognostic impact only in the luminal-related groups, whereas the complexity identified by CAAI had an overall independent prognostic power. This study emphasizes the relation among structural genomic alterations, molecular subtype, and clinical behavior and shows that objective score of genomic complexity (CAAI) is an independent prognostic marker in breast cancer.
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Affiliation(s)
- Hege G Russnes
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway.,Division of Pathology, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway.,Insitute for Clinical Medicine, Faculty of Medicine, University of Oslo
| | - Hans Kristian Moen Vollan
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway.,Insitute for Clinical Medicine, Faculty of Medicine, University of Oslo.,Department of Breast and Endocrine Surgery, Division of Surgery and Cancer, Oslo University Hospital, 0450 Oslo, Norway
| | - Ole Christian Lingjærde
- Biomedical Research Group, Department of Informatics, University of Oslo, P.O. Box 1080 Blindern, 0316 Oslo, Norway
| | | | - Pär Lundin
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, SE-171 76 Stockholm, Sweden
| | - Bjørn Naume
- Department of Oncology, Division of Surgery and Cancer, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway
| | - Therese Sørlie
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway
| | - Elin Borgen
- Division of Pathology, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway
| | - Inga H Rye
- Division of Pathology, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway
| | - Anita Langerød
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway
| | - Suet-Feung Chin
- Breast Cancer Functional Genomics, Cancer Research UK Cambridge Research Institute and Department of Oncology, University of Cambridge, Li Ka-Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
| | - Andrew E Teschendorff
- Breast Cancer Functional Genomics, Cancer Research UK Cambridge Research Institute and Department of Oncology, University of Cambridge, Li Ka-Shing Centre, Robinson Way, Cambridge CB2 0RE, UK.,UCL Cancer Institute, University College London, WC1E 6BT, UK
| | - Philip J Stephens
- Cancer Genome Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK
| | - Susanne Månér
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, SE-171 76 Stockholm, Sweden
| | - Ellen Schlichting
- Department of Breast and Endocrine Surgery, Division of Surgery and Cancer, Oslo University Hospital, 0450 Oslo, Norway
| | - Lars O Baumbusch
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway.,Division of Pathology, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway.,Biomedical Research Group, Department of Informatics, University of Oslo, P.O. Box 1080 Blindern, 0316 Oslo, Norway
| | - Rolf Kåresen
- Department of Breast and Endocrine Surgery, Division of Surgery and Cancer, Oslo University Hospital, 0450 Oslo, Norway
| | - Michael P Stratton
- Cancer Genome Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK.,Institute of Cancer Research, Sutton, Surrey SM2 5NG, UK
| | - Michael Wigler
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | - Carlos Caldas
- Breast Cancer Functional Genomics, Cancer Research UK Cambridge Research Institute and Department of Oncology, University of Cambridge, Li Ka-Shing Centre, Robinson Way, Cambridge CB2 0RE, UK.,Cambridge Breast Unit, Addenbrookes Hospital and Cambridge NIHR Biomedical Research Centre, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge, UK
| | - Anders Zetterberg
- Department of Oncology-Pathology, Karolinska Institutet, Cancer Center Karolinska, SE-171 76 Stockholm, Sweden
| | - James Hicks
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | - Anne-Lise Børresen-Dale
- Department of Genetics, Institute for Cancer Research, Oslo University Hospital Radiumhospitalet, 0310 Oslo, Norway.,Insitute for Clinical Medicine, Faculty of Medicine, University of Oslo
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24
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Geigl JB, Obenauf AC, Waldispuehl-Geigl J, Hoffmann EM, Auer M, Hörmann M, Fischer M, Trajanoski Z, Schenk MA, Baumbusch LO, Speicher MR. Identification of small gains and losses in single cells after whole genome amplification on tiling oligo arrays. Nucleic Acids Res 2009; 37:e105. [PMID: 19541849 PMCID: PMC2731907 DOI: 10.1093/nar/gkp526] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [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] [Indexed: 11/30/2022] Open
Abstract
Clinical DNA is often available in limited quantities requiring whole-genome amplification for subsequent genome-wide assessment of copy-number variation (CNV) by array-CGH. In pre-implantation diagnosis and analysis of micrometastases, even merely single cells are available for analysis. However, procedures allowing high-resolution analyses of CNVs from single cells well below resolution limits of conventional cytogenetics are lacking. Here, we applied amplification products of single cells and of cell pools (5 or 10 cells) from patients with developmental delay, cancer cell lines and polar bodies to various oligo tiling array platforms with a median probe spacing as high as 65 bp. Our high-resolution analyses reveal that the low amounts of template DNA do not result in a completely unbiased whole genome amplification but that stochastic amplification artifacts, which become more obvious on array platforms with tiling path resolution, cause significant noise. We implemented a new evaluation algorithm specifically for the identification of small gains and losses in such very noisy ratio profiles. Our data suggest that when assessed with sufficiently sensitive methods high-resolution oligo-arrays allow a reliable identification of CNVs as small as 500 kb in cell pools (5 or 10 cells), and of 2.6–3.0 Mb in single cells.
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Affiliation(s)
- Jochen B Geigl
- Institute of Human Genetics, Medical University of Graz, Harrachgasse 21/8, A-8010 Graz, Austria
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25
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Molloy TJ, Bosma AJ, Baumbusch LO, Borgen E, van't Veer LJ, Naume B. A multi-marker QPCR panel for the detection of circulating tumor cells predicts survival in breast cancer patients. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-305] [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
Abstract #305
The detection of circulating tumor cells (CTCs) in the blood of cancer patients is a promising tool for risk stratification, treatment tailoring, and monitoring of the disease state. We previously developed a QPCR-based detection platform for the semi-quantitation of circulating tumor cells in the peripheral blood of breast cancer patients. This CTC assay combines gene expression data from 4 tumor marker genes into a single score using a quadratic discriminant analysis, and is optimized such that positivity indicates tumor cell presence, and negativity indicates tumor cell absence. An initial cohort of metastatic patients demonstrated that score positivity was correlated to a significantly shorter time to disease progression.
 The current study aimed to validate these results by using the CTC assay in an independent, retrospective patient series consisting of 111 non-metastatic stage I-III breast cancer patients (median followup 7.3 years), 16 metastatic breast cancer patients, and 28 healthy controls. Assay score positivity was observed in 14 out of 16 (88%) metastatic patients, 16 out of 111 (14%) non-metastatic stage I-III patients, and 0 out of 28 (0%) healthy female controls.
 In the early stage patient group, a positive CTC score was correlated to significantly poorer relapse-free survival (HR = 3.6, 95% CI = 1.7-7.9, p < 0.01) and overall survival (HR = 3.2, 95% CI = 1.6-6.1, p < 0.01). The assay was particularly powerful in patients with no lymph node metastases at time of diagnosis (relapse-free survival HR = 13.0, 95%CI = 3.0-55.7, p < 0.01, overall survival HR = 6.3, 95% CI = 1.9-21.1, p < 0.01). This platform compared very favorably to the traditional immunohistochemistry-based assay for disseminated tumor cell detection in bone marrow utilizing pan-anticytokeratin staining (AE1/AE3), which was not a significant predictor of survival in this patient group (HR = 1.3, 95% CI = 0.6-2.4, p = 0.49). In multivariate analyses, our CTC assay was a significant, independent predictor of overall survival.
 Work is currently ongoing to expand the study to include an additional 500-600 patients which should serve as a robust validation of the assay. This CTC detection platform represents an objective assay with both high specificity and prognostic power, and could be an effective clinical tool for outcome prediction in breast cancer patients.
 This work was supported by the Sixth Framework Program of the European Commission as part of the international DISMAL collaboration for research into disseminated epithelial malignancies.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 305.
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Affiliation(s)
- TJ Molloy
- 1 Netherlands Cancer Institute, Amsterdam, Netherlands
| | - AJ Bosma
- 1 Netherlands Cancer Institute, Amsterdam, Netherlands
| | | | - E Borgen
- 2 The Norwegian Radium Hospital, Oslo, Norway
| | - LJ van't Veer
- 1 Netherlands Cancer Institute, Amsterdam, Netherlands
| | - B Naume
- 2 The Norwegian Radium Hospital, Oslo, Norway
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Baumbusch LO, Aarøe J, Johansen FE, Hicks J, Sun H, Bruhn L, Gunderson K, Naume B, Kristensen VN, Liestøl K, Børresen-Dale AL, Lingjaerde OC. Comparison of the Agilent, ROMA/NimbleGen and Illumina platforms for classification of copy number alterations in human breast tumors. BMC Genomics 2008; 9:379. [PMID: 18691401 PMCID: PMC2547478 DOI: 10.1186/1471-2164-9-379] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Accepted: 08/08/2008] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Microarray Comparative Genomic Hybridization (array CGH) provides a means to examine DNA copy number aberrations. Various platforms, brands and underlying technologies are available, facing the user with many choices regarding platform sensitivity and number, localization, and density distribution of probes. RESULTS We evaluate three different platforms presenting different nature and arrangement of the probes: The Agilent Human Genome CGH Microarray 44 k, the ROMA/NimbleGen Representational Oligonucleotide Microarray 82 k, and the Illumina Human-1 Genotyping 109 k BeadChip, with Agilent being gene oriented, ROMA/NimbleGen being genome oriented, and Illumina being genotyping oriented. We investigated copy number changes in 20 human breast tumor samples representing different gene expression subclasses, using a suite of graphical and statistical methods designed to work across platforms. Despite substantial differences in the composition and spatial distribution of probes, the comparison revealed high overall concordance. Notably however, some short amplifications and deletions of potential biological importance were not detected by all platforms. Both correlation and cluster analysis indicate a somewhat higher similarity between ROMA/NimbleGen and Illumina than between Agilent and the other two platforms. The programs developed for the analysis are available from http://www.ifi.uio.no/bioinf/Projects/. CONCLUSION We conclude that platforms based on different technology principles reveal similar aberration patterns, although we observed some unique amplification or deletion peaks at various locations, only detected by one of the platforms. The correct platform choice for a particular study is dependent on whether the appointed research intention is gene, genome, or genotype oriented.
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Affiliation(s)
- L O Baumbusch
- Department of Genetics, Institute for Cancer Research, Norwegian Radium Hospital, Rikshospitalet University Hospital, 0310 Oslo, Norway.
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Baumbusch LO, Myhre S, Langerød A, Bergamaschi A, Geisler SB, Lønning PE, Deppert W, Dornreiter I, Børresen-Dale AL. Expression of full-length p53 and its isoform Deltap53 in breast carcinomas in relation to mutation status and clinical parameters. Mol Cancer 2006; 5:47. [PMID: 17054774 PMCID: PMC1636663 DOI: 10.1186/1476-4598-5-47] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2006] [Accepted: 10/20/2006] [Indexed: 11/22/2022] Open
Abstract
Background The tumor suppressor gene p53 (TP53) controls numerous signaling pathways and is frequently mutated in human cancers. Novel p53 isoforms suggest alternative splicing as a regulatory feature of p53 activity. Results In this study we have analyzed mRNA expression of both wild-type and mutated p53 and its respective Δp53 isoform in 88 tumor samples from breast cancer in relation to clinical parameters and molecular subgroups. Three-dimensional structure differences for the novel internally deleted p53 isoform Δp53 have been predicted. We confirmed the expression of Δp53 mRNA in tumors using quantitative real-time PCR technique. The mRNA expression levels of the two isoforms were strongly correlated in both wild-type and p53-mutated tumors, with the level of the Δp53 isoform being approximately 1/3 of that of the full-length p53 mRNA. Patients expressing mutated full-length p53 and non-mutated (wild-type) Δp53, "mutational hybrids", showed a slightly higher frequency of patients with distant metastasis at time of diagnosis compared to other patients with p53 mutations, but otherwise did not differ significantly in any other clinical parameter. Interestingly, the p53 wild-type tumors showed a wide range of mRNA expression of both p53 isoforms. Tumors with mRNA expression levels in the upper or lower quartile were significantly associated with grade and molecular subtypes. In tumors with missense or in frame mutations the mRNA expression levels of both isoforms were significantly elevated, and in tumors with nonsense, frame shift or splice mutations the mRNA levels were significantly reduced compared to those expressing wild-type p53. Conclusion Expression of p53 is accompanied by the functionally different isoform Δp53 at the mRNA level in cell lines and human breast tumors. Investigations of "mutational hybrid" patients highlighted that wild-type Δp53 does not compensates for mutated p53, but rather may be associated with a worse prognosis. In tumors, both isoforms show strong correlations in different mutation-dependent mRNA expression patterns.
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Affiliation(s)
- Lars O Baumbusch
- Department of Genetics, Institute for Cancer Research, Rikshospitalet-Radiumhospitalet Medical Center, 0310 Oslo, Norway
| | - Simen Myhre
- Department of Genetics, Institute for Cancer Research, Rikshospitalet-Radiumhospitalet Medical Center, 0310 Oslo, Norway
| | - Anita Langerød
- Department of Genetics, Institute for Cancer Research, Rikshospitalet-Radiumhospitalet Medical Center, 0310 Oslo, Norway
| | - Anna Bergamaschi
- Department of Genetics, Institute for Cancer Research, Rikshospitalet-Radiumhospitalet Medical Center, 0310 Oslo, Norway
- Medical Faculty, University of Oslo, Oslo, Norway
| | - Stephanie B Geisler
- Department of Medicine, Section of Oncology, Haukeland University Hospital, 5021 Bergen, Norway
| | - Per E Lønning
- Department of Medicine, Section of Oncology, Haukeland University Hospital, 5021 Bergen, Norway
| | - Wolfgang Deppert
- Heinrich-Pette-Institut für Experimentelle Virologie und Immunologie an der Universität Hamburg, Martinistr. 52, 20251 Hamburg, Germany
| | - Irene Dornreiter
- Heinrich-Pette-Institut für Experimentelle Virologie und Immunologie an der Universität Hamburg, Martinistr. 52, 20251 Hamburg, Germany
| | - Anne-Lise Børresen-Dale
- Department of Genetics, Institute for Cancer Research, Rikshospitalet-Radiumhospitalet Medical Center, 0310 Oslo, Norway
- Medical Faculty, University of Oslo, Oslo, Norway
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Baumbusch LO, Myhre S, Langerød A, Bergamaschi A, Johnsen H, Geisler S, Lønning PE, Børresen-Dale AL. Expression of wild-type and mutated TP53in breast carcinomas. Breast Cancer Res 2005. [PMCID: PMC4233598 DOI: 10.1186/bcr1177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
SUMMARY CGH-Explorer is a program for visualization and statistical analysis of microarray-based comparative genomic hybridization (array-CGH) data. The program has preprocessing facilities, tools for graphical exploration of individual arrays or groups of arrays, and tools for statistical identification of regions of amplification and deletion.
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Baumbusch LO, Hughes DW, Galau GA, Jakobsen KS. LEC1, FUS3, ABI3 and Em expression reveals no correlation with dormancy in Arabidopsis. J Exp Bot 2004; 55:77-87. [PMID: 14676287 DOI: 10.1093/jxb/erh014] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Dormant Arabidopsis seeds require stratification and light for germination. To study gene expression during establishment, maintenance and release of dormancy, various Arabidopsis ecotypes that are different in their degree of dormancy were investigated; three nsm mutants that lack the stratification-dependency, and the precocious germination and reduced dormancy of the abi3-1 mutant (insensitive to ABA). Genes examined by mRNA abundance include LEC1, FUS3 and ABI3, transcription factors that are major regulators of embryo development and, at least indirectly, play some role in the control of dormancy. Moreover, the late embryogenesis marker genes, AtEm1 and AtEm6, were examined in relation to the state of dormancy. The expression of LEC1, FUS3 and ABI3 mRNA is only marginally different during seed development in various strong or moderate dormancy wild types, nsm mutants and abi3-1. Therefore, it is unlikely that these transcription factors directly control the establishment of dormancy in Arabidopsis. Sole and various combina tions of light, temperature, and after-ripening regimes that alter germination behaviour were examined to determine if the expression of ABI3, AtEm1 and AtEm6 mRNAs were correlated with dormancy-breaking processes. ABI3 expression is influenced by cold and light, in a similar way in both dormant and non-dormant wild-type seeds. ABI3 transcript abundance in the nsm1 and nsm2 mutants is higher and in the nsm5-1 mutant is marginally lower than in wild-type seeds, but changes due to temperature and light factors are very similar to those that occur in wild-type seeds. The abundances of AtEm1 and AtEm6 mRNAs are equally affected by imbibition and cold temperature in mature and after-ripened seeds. The LEA transcript abundances for AtEm1 and AtEm6 are reduced in nsm mutants in a common, ABI3-independent pathway.
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Affiliation(s)
- Lars O Baumbusch
- Division of Cell and Molecular Biology, Biological Institute, University of Oslo, PO Box 1031, Blindern, N-0315 Oslo, Norway.
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Baumbusch LO, Thorstensen T, Krauss V, Fischer A, Naumann K, Assalkhou R, Schulz I, Reuter G, Aalen RB. The Arabidopsis thaliana genome contains at least 29 active genes encoding SET domain proteins that can be assigned to four evolutionarily conserved classes. Nucleic Acids Res 2001; 29:4319-33. [PMID: 11691919 PMCID: PMC60187 DOI: 10.1093/nar/29.21.4319] [Citation(s) in RCA: 264] [Impact Index Per Article: 11.5] [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: 11/13/2022] Open
Abstract
SET domains are conserved amino acid motifs present in chromosomal proteins that function in epigenetic control of gene expression. These proteins can be divided into four classes as typified by their Drosophila members E(Z), TRX, ASH1 and SU(VAR)3-9. Homologs of all four classes have been identified in yeast and mammals, but not in plants. A BLASTP screening of the Arabidopsis genome identified 37 genes: three E(z) homologs, five trx homologs, four ash1 homologs and 15 genes similar to Su(var)3-9. Seven genes were assigned as trx-related and three as ash1-related. Only four genes have been described previously. Our classification is based on the characteristics of the SET domains, cysteine-rich regions and additional conserved domains, including a novel YGD domain. RT-PCR analysis, cDNA cloning and matching ESTs show that at least 29 of the genes are active in diverse tissues. The high number of SET domain genes, possibly involved in epigenetic control of gene activity during plant development, can partly be explained by extensive genome duplication in Arabidopsis. Additionally, the lack of introns in the coding region of eight SU(VAR)3-9 class genes indicates evolution of new genes by retrotransposition. The identification of putative nuclear localization signals and AT-hooks in many of the proteins supports an anticipated nuclear localization, which was demonstrated for selected proteins.
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MESH Headings
- Active Transport, Cell Nucleus
- Amino Acid Motifs
- Amino Acid Sequence
- Arabidopsis/chemistry
- Arabidopsis/genetics
- Arabidopsis/growth & development
- Arabidopsis Proteins/chemistry
- Arabidopsis Proteins/classification
- Arabidopsis Proteins/genetics
- Conserved Sequence
- Cysteine/metabolism
- Databases, Protein
- Evolution, Molecular
- Gene Duplication
- Gene Expression Profiling
- Gene Expression Regulation, Plant
- Genes, Duplicate/genetics
- Genes, Plant/genetics
- Genome, Plant
- Histone-Lysine N-Methyltransferase/chemistry
- Histone-Lysine N-Methyltransferase/classification
- Histone-Lysine N-Methyltransferase/genetics
- Introns/genetics
- Molecular Sequence Data
- Nuclear Localization Signals
- Open Reading Frames/genetics
- Protein Binding
- Protein Structure, Tertiary
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Plant/genetics
- RNA, Plant/metabolism
- Retroelements/genetics
- Sequence Alignment
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Affiliation(s)
- L O Baumbusch
- Division of Molecular Biology, Department of Biology, University of Oslo, PO Box 1031 Blindern, N-0315 Norway
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Baumbusch LO, Eiblmeier M, Schnitzler JP, Heller W, Sandermann H, Polle A. Interactive effects of ozone and low UV-B radiation on antioxidants in spruce (Picea abies) and pine (Pinus sylvestris) needles. Physiol Plant 1998; 104:248-254. [PMID: 28244603 DOI: 10.1034/j.1399-3054.1998.1040213.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
To study the role of low UV-B radiation in modulating the response of antioxidants to ozone, 4-year-old pine (Pinus sylvestris L.) and spruce (Picea abies L.) seedlings potted in natural soil, were exposed in phytochambers to fluctuating ozone concentrations between 9 and 113 nl 1-1 according to field data recorded at Mt Wank (1175 m above sea level, Bavaria, Germany) and two-times ambient O3 levels. UV-B radiation was either added at a biologically effective level of ca 1.2 kJ m-2 day-1 , which is close to that found in March at Mt Wank, or was excluded by filters (<0.08 kJ m-2 day-1 ). After one growth phase current-year needles were collected and analysed for antioxidative enzyme activities (superoxide dismutase, SOD, EC 1.15.1.1; catalase, CAT, EC 1.11.1.6; guaiacol peroxidase, POD, EC 1.11.1.7) and soluble antioxidants (ascorbate, glutathione). CAT, POD, ascorbate and glutathione, but not SOD, were increased in needles of both species in response to twice ambient O3 levels. UV-B radiation in the presence of ambient O3 caused an increase in total SOD activity in spruce but had no effects on antioxidants in pine. Twice ambient O3 levels together with low UV-B radiation counteracted the O3 -induced increases in ascorbate and CAT in pine but not in spruce. Under these conditions spruce needles showed the highest antioxidative protection and revealed no indication of lipid peroxidation. Pine needles exposed to UV-B and elevated O3 levels showed elevated lipid peroxidation and a 5-fold increase in dehydroascorbate, suggesting that this species was less protected and suffered higher oxidative stress than spruce.
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Affiliation(s)
- Lars O Baumbusch
- L. O. Baumbusch and M. Eiblmeier, Albert-Ludwigs-Univ. Freiburg, Inst für Forstbotanik und Baumphysiologie, Am Flughafen 17, D-79085 Freiburg, Germany; J.-P. Schnitzler, Fraunhofer Inst für Atmosphärische Umweltforschung, Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany; W. Heller and H. Sandermann, Jr, GSF-Forschungszentrum für Umwelt und Gesundheit, Inst für Biochemische Pflanzenpathologie, Ingolstädter Landstr. 1, D-85758 Oberschleissheim, Germany; A. Polle (corresponding author, e-mail ), Forstbotanisches Inst, Univ. Göttingen, Büsgenweg 2, D-37077 Göttingen, Germany
| | - Monika Eiblmeier
- L. O. Baumbusch and M. Eiblmeier, Albert-Ludwigs-Univ. Freiburg, Inst für Forstbotanik und Baumphysiologie, Am Flughafen 17, D-79085 Freiburg, Germany; J.-P. Schnitzler, Fraunhofer Inst für Atmosphärische Umweltforschung, Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany; W. Heller and H. Sandermann, Jr, GSF-Forschungszentrum für Umwelt und Gesundheit, Inst für Biochemische Pflanzenpathologie, Ingolstädter Landstr. 1, D-85758 Oberschleissheim, Germany; A. Polle (corresponding author, e-mail ), Forstbotanisches Inst, Univ. Göttingen, Büsgenweg 2, D-37077 Göttingen, Germany
| | - Jörg-Peter Schnitzler
- L. O. Baumbusch and M. Eiblmeier, Albert-Ludwigs-Univ. Freiburg, Inst für Forstbotanik und Baumphysiologie, Am Flughafen 17, D-79085 Freiburg, Germany; J.-P. Schnitzler, Fraunhofer Inst für Atmosphärische Umweltforschung, Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany; W. Heller and H. Sandermann, Jr, GSF-Forschungszentrum für Umwelt und Gesundheit, Inst für Biochemische Pflanzenpathologie, Ingolstädter Landstr. 1, D-85758 Oberschleissheim, Germany; A. Polle (corresponding author, e-mail ), Forstbotanisches Inst, Univ. Göttingen, Büsgenweg 2, D-37077 Göttingen, Germany
| | - Werner Heller
- L. O. Baumbusch and M. Eiblmeier, Albert-Ludwigs-Univ. Freiburg, Inst für Forstbotanik und Baumphysiologie, Am Flughafen 17, D-79085 Freiburg, Germany; J.-P. Schnitzler, Fraunhofer Inst für Atmosphärische Umweltforschung, Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany; W. Heller and H. Sandermann, Jr, GSF-Forschungszentrum für Umwelt und Gesundheit, Inst für Biochemische Pflanzenpathologie, Ingolstädter Landstr. 1, D-85758 Oberschleissheim, Germany; A. Polle (corresponding author, e-mail ), Forstbotanisches Inst, Univ. Göttingen, Büsgenweg 2, D-37077 Göttingen, Germany
| | - Heinrich Sandermann
- L. O. Baumbusch and M. Eiblmeier, Albert-Ludwigs-Univ. Freiburg, Inst für Forstbotanik und Baumphysiologie, Am Flughafen 17, D-79085 Freiburg, Germany; J.-P. Schnitzler, Fraunhofer Inst für Atmosphärische Umweltforschung, Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany; W. Heller and H. Sandermann, Jr, GSF-Forschungszentrum für Umwelt und Gesundheit, Inst für Biochemische Pflanzenpathologie, Ingolstädter Landstr. 1, D-85758 Oberschleissheim, Germany; A. Polle (corresponding author, e-mail ), Forstbotanisches Inst, Univ. Göttingen, Büsgenweg 2, D-37077 Göttingen, Germany
| | - Andrea Polle
- L. O. Baumbusch and M. Eiblmeier, Albert-Ludwigs-Univ. Freiburg, Inst für Forstbotanik und Baumphysiologie, Am Flughafen 17, D-79085 Freiburg, Germany; J.-P. Schnitzler, Fraunhofer Inst für Atmosphärische Umweltforschung, Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, Germany; W. Heller and H. Sandermann, Jr, GSF-Forschungszentrum für Umwelt und Gesundheit, Inst für Biochemische Pflanzenpathologie, Ingolstädter Landstr. 1, D-85758 Oberschleissheim, Germany; A. Polle (corresponding author, e-mail ), Forstbotanisches Inst, Univ. Göttingen, Büsgenweg 2, D-37077 Göttingen, Germany
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