1
|
Nunes S, Faria CC, Pimentel J, Roque RF, Alaiz H, Salazar I, Pereira T, Ferreira F, Roque L. Medulloblastoma Development in a Patient with a Constitutional Balanced t(5;22)(q35.1;q11.2) Involving the NF2 Gene. Case Rep Oncol 2023; 16:36-44. [PMID: 36748018 PMCID: PMC9898807 DOI: 10.1159/000527564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 10/10/2022] [Indexed: 02/05/2023] Open
Abstract
Neurofibromatosis type 2 (NF2) is a brain tumor predisposing syndrome caused by inactivating alterations of the NF2 gene mapped at chromosome 22q. Currently, no genetic information exists on medulloblastomas occurring in NF2 patients. We herein report on the genetic alterations observed in a girl in which the NF2 gene was de novo altered due to a constitutional translocation: t(5;22)(q35.1;q11.2). This girl had a particularly aggressive disease course. At the age of 4, she had already been diagnosed with three lesions classified as schwannomas and a meningioma. At 10 years old, she developed a medulloblastoma. She died at the age of 14 due to a refractory acute myeloid leukemia (AML). From the genetic point of view, we observed that (1) the NF2 gene was rearranged in all patient samples: blood, tumor, and leukemic cells; (2) loss of 3' region of NF2 and the downstream regions of chromosome 22 were only detected in medulloblastoma cells; (3) the known cancer AML-related gene: NPM1 which is mapped at 5q35.1 was not the target of any alteration in our patient. Our data suggest that inactivation of the NF2 gene was relevant for the medulloblastoma pathogenesis. Furthermore, we know that malignant cancers are the result of a multi-epi-genetic sequence of events, and although, unquestionably limited to the genetic findings in one case. We may hypothesize, that as described for a fraction of medulloblastomas, the alteration of a gene mapped at 5q might also have been relevant for medulloblastoma development in our patient.
Collapse
Affiliation(s)
- Sofia Nunes
- Pediatric Neuro-Oncology Unit, Instituto Português de Oncologia de Lisboa (IPO), Lisbon, Portugal
| | - Claudia C. Faria
- Neurosurgery Department, Centro Hospitalar Universitário Lisboa Norte (CHULN): Institute for Molecular Medicine, João Lobo Antunes, Medical University of Lisbon, Lisbon, Portugal
| | - José Pimentel
- Neuropathology Laboratory, Department of Neurology, Centro Hospitalar Universitário Lisboa Norte (CHULN), Lisbon, Portugal
| | - Rafael Fidalgo Roque
- Neuropathology Laboratory, Department of Neurology, Centro Hospitalar Universitário Lisboa Norte (CHULN), Lisbon, Portugal
| | - Helena Alaiz
- Cytogenetics Laboratory, Department of Hemato-Oncology, Instituto Português de Oncologia de Lisboa (IPO), Lisbon, Portugal
| | - Isabel Salazar
- Cytogenetics Laboratory, Department of Hemato-Oncology, Instituto Português de Oncologia de Lisboa (IPO), Lisbon, Portugal
| | - Teresa Pereira
- Cytogenetics Laboratory, Department of Hemato-Oncology, Instituto Português de Oncologia de Lisboa (IPO), Lisbon, Portugal
| | - Filipa Ferreira
- Molecular Biology Laboratory, Department of Hemato-Oncology, Instituto Português de Oncologia de Lisboa (IPO), Lisbon, Portugal
| | - Lúcia Roque
- Cytogenetics Laboratory, Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa (IPO), Lisbon, Portugal
| |
Collapse
|
2
|
Sande MG, Roque L, Braga A, Marques M, Ferreira D, Saragliadis A, Rodrigues JL, Linke D, Ramada D, Silva C, Rodrigues LR. Design of new hydrolyzed collagen-modified magnetic nanoparticles to capture pathogens. J Biomed Mater Res B Appl Biomater 2023; 111:354-365. [PMID: 36063491 DOI: 10.1002/jbm.b.35155] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 07/28/2022] [Accepted: 08/17/2022] [Indexed: 12/15/2022]
Abstract
Enrichment and diagnosis tools for pathogens currently available are time consuming, thus the development of fast and highly sensitive alternatives is desirable. In this study, a novel approach was described that enables selective capture of bacteria expressing hydrolyzed collagen-binding adhesins with hydrolyzed collagen-coated magnetic nanoparticles (MNPs). This platform could be useful to shorten the time needed to confirm the presence of a bacterial infection. MNPs were synthesized by a simple two-step approach through a green co-precipitation method using water as solvent. These MNPs were specifically designed to interact with pathogenic bacteria by establishing a hydrolyzed collagen-adhesin linker. The bacterial capture efficacy of hydrolyzed collagen MNPs (H-Coll@MNPs) for bacteria expressing collagen binding adhesins was 1.3 times higher than that of arginine MNPs (Arg@MNPs), herein used as control. More importantly, after optimization of the MNP concentration and contact time, the H-Coll@MNPs were able to capture 95% of bacteria present in the samples. More importantly, the bacteria can be enriched within 30 min and the time for bacterial identification is effectively shortened in comparison to the "gold standard" in clinical diagnosis. These results suggest that H-Coll@MNPs can be used for the selective isolation of specific bacteria from mixed populations present, for example, in biological samples.
Collapse
Affiliation(s)
- Maria G Sande
- CEB-Centre of Biological Engineering, Universidade do Minho, Braga, Portugal.,LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
| | - Lúcia Roque
- CENTI-Center for Nanotechnology and Smart Materials, Vila Nova de Famalicão, Portugal
| | - Adelaide Braga
- CEB-Centre of Biological Engineering, Universidade do Minho, Braga, Portugal.,LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
| | - Márcia Marques
- CENTI-Center for Nanotechnology and Smart Materials, Vila Nova de Famalicão, Portugal
| | - Débora Ferreira
- CEB-Centre of Biological Engineering, Universidade do Minho, Braga, Portugal.,LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
| | - Athanasios Saragliadis
- Section for Genetics and Evolutionary Biology, Department of Biosciences, University of Oslo, Oslo, Norway
| | - Joana L Rodrigues
- CEB-Centre of Biological Engineering, Universidade do Minho, Braga, Portugal.,LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
| | - Dirk Linke
- Section for Genetics and Evolutionary Biology, Department of Biosciences, University of Oslo, Oslo, Norway
| | - David Ramada
- CENTI-Center for Nanotechnology and Smart Materials, Vila Nova de Famalicão, Portugal
| | - Carla Silva
- CENTI-Center for Nanotechnology and Smart Materials, Vila Nova de Famalicão, Portugal.,CITEVE-Technological Center for the Textile and Clothing Industries of Portugal, Vila Nova de Famalicão, Portugal
| | - Lígia R Rodrigues
- CEB-Centre of Biological Engineering, Universidade do Minho, Braga, Portugal.,LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
| |
Collapse
|
3
|
Azevedo A, Roque R, Passos J, Nunes S, Migueis J, Faria C, Sagarribay A, Serpa A, Roque L, Mafra M, Salgado D. P04.02.A Integrated diagnosis and therapeutic decision of pediatric nervous system tumors using a comprehensive genomic profiling test. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac174.117] [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: 11/13/2022] Open
Abstract
Abstract
Background
Nervous system tumors (NST) are one of the leading causes of cancer-related death in children. Next-generation sequencing has enabled the identification of an increasing number of genetic markers, allowing for a more accurate diagnosis, and may help guide clinicians towards a more specific therapeutic approach.
Material and Methods
Retrospective cohort study of pediatric and young adult patients with NST analyzed with FoundationOneHeme® (FOH) panel from March 2020 to April 2021. This panel was requested, in addition to previously performed pathological reviews and routine genetic tests, in order to obtain more accurate diagnoses and/or possible therapeutic targets.
Results
Fifty NST were analyzed with FOH panel, corresponding to 49 patients. Median age at NST diagnosis was 13 years (range 0-23 years); 50% were females. Initial diagnoses were: 10 pilocytic astrocytomas, 10 diffuse gliomas, 5 ependymomas, 6 mixed neuronal-glial tumors, 7 embryonal tumors, 3 meningeal tumors, 5 peripheral nervous system tumors (PNST) and 4 other types of tumors. There was a change in the final integrated diagnosis after performing the FOH panel in 10 patients (1 pilocytic astrocytoma, 3 diffuse gliomas, 4 mixed neuronal-glial tumors and 1 PNST). In thirty patients, at least one possible therapeutic target was identified: in 5 patients the target therapies are approved for the patients’ tumor type; in 20 patients, target therapies are approved for the same mutations in other tumor types; and in 30 patients target therapies are still being evaluated in ongoing clinical trials. After the results of the FOH panel were known, the previous therapeutic approach was changed in 15 patients, but in only 4 this was attributed to the new genomic findings.
Conclusion
Comprehensive genomic profiling tests can improve diagnostic accuracy and allow for a more reliable approach to the management of pediatric patients with nervous system tumors. Although in most patients there was no immediate therapeutic application of the potential targets found, the genomic data obtained could be very useful to patients who may have tumor progressions in the future.
Collapse
Affiliation(s)
- A Azevedo
- IPOFG Lisboa , Lisbon , Portugal
- Faculdade de Ciencias da Saude, UBI , Covilha , Portugal
| | - R Roque
- Centro Hospitalar de Lisboa Norte , Lisbon , Portugal
| | - J Passos
- IPOFG Lisboa , Lisbon , Portugal
| | - S Nunes
- IPOFG Lisboa , Lisbon , Portugal
| | | | - C Faria
- Centro Hospitalar de Lisboa Norte , Lisbon , Portugal
| | - A Sagarribay
- Centro Hospitalar e Universitario de Lisboa Central , Lisbon , Portugal
| | - A Serpa
- IPOFG Lisboa , Lisbon , Portugal
| | - L Roque
- IPOFG Lisboa , Lisbon , Portugal
| | - M Mafra
- Centro Hospitalar e Universitario de Lisboa Central , Lisbon , Portugal
| | | |
Collapse
|
4
|
Brito C, Tomás A, Azevedo A, Esteves S, Mafra M, Roque L, Pojo M. PIK3CA Mutations in Diffuse Gliomas: An Update on Molecular Stratification, Prognosis, Recurrence, and Aggressiveness. Clin Med Insights Oncol 2022; 16:11795549211068804. [PMID: 35023985 PMCID: PMC8743979 DOI: 10.1177/11795549211068804] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 12/06/2021] [Indexed: 11/15/2022] Open
Abstract
Introduction: PIK3CA is one of the most mutated oncogenes in solid tumors. In breast cancer (ER-positive, HER2-negative), these events represent a predictive biomarker of response to alpelisib. In glioblastomas (GBM), PIK3CA mutations were described as early constitutive events. Here, we investigated PIK3CA mutational profile across glioma molecular subgroups and its relevance during glioma recurrence. Furthermore, PIK3CA mutations’ effect in PI3K pathway, prognosis, and response to therapy was also explored. Material and Methods: Exons 10 and 21 of PIK3CA mutations were evaluated in 394 gliomas and 19 glioma recurrences from Instituto Português de Oncologia Lisboa Francisco Gentil (IPOLFG) and compared with The Cancer Genome Atlas (TCGA) data. TIMER2.0 and NetMHCpan4.1 were used to assess the immune-microenvironment contribution. Results: PIK3CA mutations were identified among all glioma subgroups, although with no impact on their stratification or prognosis. In both cohorts (IPOLFG and TCGA), PIK3CA mutation frequencies in IDH-mutant and IDH-wild-type GBM were similar (IPOLFG: 9% and 3%; TCGA: 8% and 2%). These mutations were not mutually exclusive with PTEN deletion and EGFR amplification. Despite their reduced frequency, we discovered PIK3CA mutations were maintained during glioma recurrence regardless of administered therapies. The immune microenvironment might not contribute to this phenotype as PIK3CA mutations did not influence immune cell infiltration. Conclusions: Despite the absence of a predominant effect in glioma stratification, PIK3CA mutations were maintained during glioma recurrence, possibly contributing to glioma cell survival, representing promising therapeutic targets in recurrent glioma. Nevertheless, understanding the potential synergistic effects between PIK3CA mutations, PTEN deletion, and EGFR amplification is pivotal to targeted therapies’ efficiency.
Collapse
Affiliation(s)
- Cheila Brito
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Lisboa, Portugal
| | - Ana Tomás
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Lisboa, Portugal
| | - Ana Azevedo
- Serviço de Neurologia, Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Lisboa, Portugal
- Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
| | - Susana Esteves
- Unidade de Investigação Clínica (UIC), Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Lisboa, Portugal
| | - Manuela Mafra
- Serviço de Anatomia Patológica, Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Lisboa, Portugal
| | - Lúcia Roque
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Lisboa, Portugal
| | - Marta Pojo
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Lisboa, Portugal
| |
Collapse
|
5
|
Pinto AT, Pojo M, Simões-Pereira J, Roque R, Saramago A, Roque L, Martins C, André S, Cabeçadas J, Leite V, Cavaco BM. Establishment and characterization of a new patient-derived anaplastic thyroid cancer cell line (C3948), obtained through fine-needle aspiration cytology. Endocrine 2019; 66:288-300. [PMID: 31368081 DOI: 10.1007/s12020-019-02009-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/06/2019] [Indexed: 11/26/2022]
Abstract
PURPOSE Anaplastic thyroid cancer (ATC) is among the most aggressive and unresectable tumors, presenting a bad prognosis. A better comprehension of the functional and molecular mechanisms behind the aggressiveness of this cancer, as well as new biomarkers for aggressiveness, prognosis, and response to therapy are required. However, owing to their irresectability, ATC tissue is not always accessible. Here we describe the establishment and characterization of a new patient-derived cell line, obtained from an unresectable ATC through fine-needle aspiration cytology (FNAC). METHODS The morphology, expression of epithelial and thyroid markers, cytogenetic, mutational and gene expression profiles, doubling time, and drug-resistance profile of the new cell line, designated C3948, were investigated using several methodologies: immunostaining, karyotype analysis, comparative genomic hybridization (CGH), fluorescent in situ hybridization (FISH), next-generation sequencing (NGS), Sanger sequencing, gene expression microarrays, cell counting, and IC50 determination. RESULTS Results indicate that C3948 cell line has a histological phenotype representative of original ATC cells and a completely aberrant karyotype with many chromosomal losses and gains; harbors mutated TP53, STK11, and DIS3L2 genes; presents a gene expression profile similar to C643 ATC commercial cell line, but with some unique alterations; has a doubling time similar to C643; and the IC50 profile for paclitaxel, doxorubicin, and cisplatin is similar to C643, although higher for cisplatin. CONCLUSIONS These observations are consistent with a typical ATC cell profile, supporting C3948 cell line as a novel preclinical model, and FNAC as a useful approach to better study anaplastic thyroid cancer, including testing of new anticancer therapies.
Collapse
Affiliation(s)
- Ana T Pinto
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | - Marta Pojo
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | - Joana Simões-Pereira
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
- Serviço de Endocrinologia, Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
- Faculdade de Ciências Médicas, Nova Medical School, Campo Mártires da Pátria 130, 1169-056, Lisboa, Portugal
| | - Ruben Roque
- Serviço de Anatomia Patológica, Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | - Ana Saramago
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | - Lúcia Roque
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | - Carmo Martins
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | - Saudade André
- Serviço de Anatomia Patológica, Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | - José Cabeçadas
- Serviço de Anatomia Patológica, Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | - Valeriano Leite
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
- Serviço de Endocrinologia, Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
- Faculdade de Ciências Médicas, Nova Medical School, Campo Mártires da Pátria 130, 1169-056, Lisboa, Portugal
| | - Branca M Cavaco
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG) E.P.E., Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal.
| |
Collapse
|
6
|
Brito C, Azevedo A, Esteves S, Marques AR, Martins C, Costa I, Mafra M, Bravo Marques JM, Roque L, Pojo M. Clinical insights gained by refining the 2016 WHO classification of diffuse gliomas with: EGFR amplification, TERT mutations, PTEN deletion and MGMT methylation. BMC Cancer 2019; 19:968. [PMID: 31623593 PMCID: PMC6798410 DOI: 10.1186/s12885-019-6177-0] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [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: 04/01/2019] [Accepted: 09/20/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Significant advances in the molecular profiling of gliomas, led the 2016 World Health Organization (WHO) Classification to include, for the first-time, molecular biomarkers in glioma diagnosis: IDH mutations and 1p/19q codeletion. Here, we evaluated the effect of this new classification in the stratification of gliomas previously diagnosed according to 2007 WHO classification. Then, we also analyzed the impact of TERT promoter mutations, PTEN deletion, EGFR amplification and MGMT promoter methylation in diagnosis, prognosis and response to therapy in glioma molecular subgroup. METHODS A cohort of 444 adult gliomas was analyzed and reclassified according to the 2016 WHO. Mutational analysis of IDH1 and TERT promoter mutations was performed by Sanger sequencing. Statistical analysis was done using SPSS Statistics 21.0. RESULTS The reclassification of this cohort using 2016 WHO criteria led to a decrease of the number of oligodendrogliomas (from 82 to 49) and an increase of astrocytomas (from 49 to 98), while glioblastomas (GBM) remained the same (n = 256). GBM was the most common diagnosis (57.7%), of which 55.2% were IDH-wildtype. 1p/19q codeleted gliomas were the subgroup associated with longer median overall survival (198 months), while GBM IDH-wildtype had the worst outcome (10 months). Interestingly, PTEN deletion had poor prognostic value in astrocytomas IDH-wildtype (p = 0.015), while in GBM IDH-wildtype was associated with better overall survival (p = 0.042) as well as MGMT promoter methylation (p = 0.009). EGFR amplification and TERT mutations had no impact in prognosis. Notably, EGFR amplification predicted a better response to radiotherapy (p = 0.011) and MGMT methylation to chemo-radiotherapy (p = 0.003). CONCLUSION In this study we observed that the 2016 WHO classification improved the accuracy of diagnosis and prognosis of diffuse gliomas, although the available biomarkers are not enough. Therefore, we suggest MGMT promoter methylation should be added to glioma classification. Moreover, we found two genetic/clinical correlations that must be evaluated to understand their impact in the clinical setting: i) how is PTEN deletion a favorable prognostic factor in GBM IDH wildtype and an unfavorable prognostic factor in astrocytoma IDH wildtype and ii) how EGFR amplification is an independent and strong factor of response to radiotherapy.
Collapse
Affiliation(s)
- Cheila Brito
- Unidade de Investigação em Patobiologia Molecular (UIPM) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal
| | - Ana Azevedo
- Serviço de Neurologia do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal.,Faculty of Health Sciences, University of Beira Interior, 6200-506, Covilhã, Portugal
| | - Susana Esteves
- Unidade de Investigação Clínica (UIC) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Porto, Portugal
| | - Ana Rita Marques
- Unidade de Investigação em Patobiologia Molecular (UIPM) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal
| | - Carmo Martins
- Unidade de Investigação em Patobiologia Molecular (UIPM) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal
| | - Ilda Costa
- Serviço de Neurologia do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal
| | - Manuela Mafra
- Serviço de Anatomia Patológica do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E, Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal
| | - José M Bravo Marques
- Serviço de Neurologia do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal
| | - Lúcia Roque
- Unidade de Investigação em Patobiologia Molecular (UIPM) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal
| | - Marta Pojo
- Unidade de Investigação em Patobiologia Molecular (UIPM) do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E., Rua Prof. Lima Basto, 1099-023, Lisbon, Portugal.
| |
Collapse
|
7
|
Brito C, Azevedo A, Esteves S, Martins C, Mafra M, Roque L, Pojo M. P03.13 Evaluation of PIK3CA mutational status in glioma molecular subgroups. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.094] [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: 11/12/2022] Open
Abstract
Abstract
BACKGROUND
Gliomas are the most common and lethal malignant tumors of central nervous system. In 2016, World Health Organization (WHO) classification included IDH mutations and 1p/19q codeletion as diagnostic criteria to define glioma entities. However, new biomarkers for diagnosis, prognosis and response to therapy are needed. In this context, PIK3CA mutations have been described as constitutive mutations, which highlights their relevance in gliomas. Here we clarified the clinical relevance of PIK3CA mutations according to the 2016 WHO classification, the potential impact on diagnosis, prognosis, response to therapy, as well as their correlation with EGFR amplification and PTEN deletion.
MATERIAL AND METHODS
A cohort of 444 adult diffuse glioma samples from Instituto Português de Oncologia Lisboa Francisco Gentil (IPOLFG) was classified according to the 2016 WHO Classification. The mutational status of exon 9 and 20 of PIK3CA was evaluated in molecular subgroups of gliomas by Sanger sequencing. PTEN deletion and EGFR amplification were identified by Fluorescent in situ hybridization (FISH).
RESULTS
PIK3CA mutations showed a higher frequency in the subgroup of gliomas with IDH mutations and 1p/19q codeletion - oligodendrogliomas (10%). In Glioblastoma (GBM) IDH-mutant and IDH-wildtype these oncogenic mutations were observed in 9% and 3% of cases, respectively. Similar results were obtained using The Cancer Genome Atlas (TCGA) data, which was 8% and 2%, respectively. H1047R and E542K were the most frequent mutations identified in the glioma molecular subgroups. Importantly, we found 3 unreported pathogenic variants in exon 20 of PIK3CA (c.3112T>C, c.2988T>C, c.3040C>T) and one polymorphic variant (c.3210A>G). In addition, PIK3CA mutations, PTEN deletion and EGFR amplification were not mutually exclusive alterations in glioma molecular subgroups. For the first time in gliomas, it was identified the rs45455192 polymorphism at a frequency of 16% in astrocytomas IDH-mutant, 24% in oligodendrogliomas and 18% in both molecular subgroups of GBM, although this polymorphism did not have prognostic value. The analysis of PIK3CA mutations in glioma recurrences showed that these mutations are maintained during glioma progression.
CONCLUSION
In two independent cohorts (IPOLFG and TCGA), it was obtained similar frequencies of PIK3CA mutations in GBM molecular subgroups. In addition, these mutations are more relevant in less aggressive gliomas (IDH-mutated and 1p/19q codeleted). These alterations seem to be important in tumor maintenance and progression, which makes this gene a potential therapeutic target. In the future, we will investigate the effect of the in vitro pharmacological inhibition of PIK3CA in GBM mutant cell lines.
Collapse
Affiliation(s)
- C Brito
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - A Azevedo
- Serviço de Neurologia do Instituto Português de Oncologia de Lisboa Francisco Gentil, E.P.E., Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal
- Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal, Portugal
| | - S Esteves
- Unidade de Investigação Clínica (UIC), Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal, Portugal
| | - C Martins
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - M Mafra
- Serviço de Anatomia Patológica do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E, Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal
| | - L Roque
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - M Pojo
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| |
Collapse
|
8
|
Frazão L, do Carmo Martins M, Nunes VM, Pimentel J, Faria C, Miguéns J, Sagarribay A, Matos M, Salgado D, Nunes S, Mafra M, Roque L. BRAF V600E mutation and 9p21: CDKN2A/B and MTAP co-deletions - Markers in the clinical stratification of pediatric gliomas. BMC Cancer 2018; 18:1259. [PMID: 30558563 PMCID: PMC6296141 DOI: 10.1186/s12885-018-5120-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 11/21/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Genetic alterations in pediatric primary brain tumors can be used as diagnostic and prognostic markers and are the basis for the development of new target therapies that, ideally, would be associated with lower mortality and morbidity. This study evaluates the incidence and interplay of the presence of BRAF V600E mutation and chromosomal 9p21 deletions in a series of 100 pediatric gliomas, aiming to determine the role of these alterations in recurrence and malignant transformation, and to verify if they could be used in the clinical set for stratifying patients for tailored therapies and surveillance. METHODS Sanger sequencing was used for the assessment of BRAF mutations at exon 15 and Fluorescent In Situ Hybridization (FISH) with BAC: RP11-14192 for the detection of 9p21 alterations. Expression levels of the CDKN2A and MTAP by real-time PCR were evaluated in cases with 9p21 deletions. Statistical analysis of genetic and clinical data was performed using Graph Pad Prism 5 and SPSS Statistics 24 software. RESULTS In our cohort it was observed that 7 /78 (8,9%) of the low-grade tumors recurred and 2 (2,6%) showed malignant transformation. BRAF V600E mutations were detected in 15 cases. No statistically significant correlations were found between the presence of BRAF V600E mutation and patient's morphologic or clinical features. Deletions at 9p21 abrogating the CDKN2A/B and MTAP loci were rare in grade I gliomas (12.2%, p = 0.0178) but frequent in grade IV gliomas (62.5%, p = 0.0087). Moreover it was found that deletions at these loci were correlated with a shorter overall survival (p = 0.011) and a shorter progression-free survival (p = 0.016). CONCLUSIONS It was demonstrated that in these tumors BRAF V600E mutated and that CDKN2A/B MTAP co-deletions may be used for stratifying patients for a stricter surveillance. The Investigating and defining if glial tumors with CDKN2A/B and MTAP homozygous loss may be vulnerable to new forms of therapy, namely those affecting the methionine salvage pathway, was proven to be of importance.
Collapse
Affiliation(s)
- Laura Frazão
- Unidade de Investigação em Patobiologia Molecular (UIPM) – IPOFG Cytogenetic Laboratory, Portuguese Cancer Institute, R. Professor Lima Basto, 1099-023 Lisbon, Portugal
| | - Maria do Carmo Martins
- Unidade de Investigação em Patobiologia Molecular (UIPM) – IPOFG Cytogenetic Laboratory, Portuguese Cancer Institute, R. Professor Lima Basto, 1099-023 Lisbon, Portugal
| | - Vasco Moura Nunes
- Unidade de Investigação em Patobiologia Molecular (UIPM) – IPOFG Cytogenetic Laboratory, Portuguese Cancer Institute, R. Professor Lima Basto, 1099-023 Lisbon, Portugal
| | - José Pimentel
- Laboratory of Neuropathology, Department of Neurology, Hospital de Santa Maria (CHLN; EPE), Institute of Molecular Medicine, Medicine Faculty of the Lisbon University, Lisbon, Portugal
| | - Claudia Faria
- Neurosurgery Department, Hospital de Santa Maria, Lisbon (CHLN; EPE) Institute of Molecular Medicine, Medicine Faculty of the Lisbon University, Lisbon, Portugal
| | - José Miguéns
- Neurosurgery Department, Hospital de Santa Maria, Lisbon (CHLN; EPE) Institute of Molecular Medicine, Medicine Faculty of the Lisbon University, Lisbon, Portugal
| | - Amets Sagarribay
- Neurosurgery Department, Hospital Dona Estefânia, (CHLC; EPE), Lisbon, Portugal
| | - Mário Matos
- Neurosurgery Department, Hospital Dona Estefânia, (CHLC; EPE), Lisbon, Portugal
| | - Duarte Salgado
- Pediatric Neuro-Oncology Unit, IPOFG, Portuguese Cancer Institute, Lisbon, Portugal
| | - Sofia Nunes
- Pediatric Neuro-Oncology Unit, IPOFG, Portuguese Cancer Institute, Lisbon, Portugal
| | - Manuela Mafra
- Department of Pathology, IPOFG, Portuguese Cancer Institute, Lisbon, Portugal
| | - Lúcia Roque
- Unidade de Investigação em Patobiologia Molecular (UIPM) – IPOFG Cytogenetic Laboratory, Portuguese Cancer Institute, R. Professor Lima Basto, 1099-023 Lisbon, Portugal
| |
Collapse
|
9
|
Roque L, Alopaeus J, Reis C, Rijo P, Molpeceres J, Hagesaether E, Tho I, Reis C. Mucoadhesive assessment of different antifungal nanoformulations. Bioinspir Biomim 2018; 13:055001. [PMID: 30024385 DOI: 10.1088/1748-3190/aad488] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Oral candidiasis is an important opportunistic fungal infection and polyenes and azoles are still the most used antifungal agents. However, the oral absorption resulting from most available treatments is generally poor and, consequently, a very high frequency of administrations of antifungal agents is strongly required. Therefore, the major challenge is to improve the retention of the antifungal agents in buccal mucosa, and the encapsulation into mucoadhesive systems may be considered as a possible strategy to achieve this objective. Three types of mucoadhesive polymeric nanoparticles (polylactic acid (PLA), polylactic-co-glycolic acid (PLGA) and alginate) were prepared using nystatin as model drug. The drug-loaded nanoparticles were then included in toothpaste, oral gel and oral films, respectively. The results demonstrated that the loaded nanoparticles were successfully produced, presenting a mean size between 300-900 nm and with a negative surface charge. Also, the determination of the encapsulation efficiency of all nanoparticles showed values above 70%. In terms of the in vitro mucoadhesion, the best formulation was the oral film loaded with the PLGA nanoparticles followed by the oral gel with PLA nanoparticles and thirdly the toothpaste with alginate nanoparticles. This was confirmed in an in vitro rinsing model with mucus producing HT29-MTX cells, where the percentage of nystatin retained to the cells after 40 min of simulated saliva flow was between 10-27% when formulations were used and only 4% for free nystatin. Further studies will include in vivo testing using animal models.
Collapse
Affiliation(s)
- L Roque
- CBiOS-Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal. Faculty of Pharmacy, Department of Biomedical Sciences, University of Alcalá, Ctra. Universidad Complutense, 28871 Alcalá de Henares, Spain
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Abstract
INTRODUCTION A wide variety of pulmonary conditions are found in cirrhotic patients and may compromise the pleura, diaphragm, parenchyma, and pulmonary vasculature, influencing the results of liver transplantation. OBJECTIVE To evaluate the pulmonary function (lung capacities, volumes, and gasometric study) of patients with liver cirrhosis awaiting liver transplantation. PATIENTS AND METHODS Cirrhotic patients, subdivided into 3 groups stratified by liver disease severity using the Child-Pugh-Turcotte score, were compared with a control group of healthy volunteers. In spirometry, the parameters evaluated were total lung capacity, forced volume in the first second, and the relationship between forced volume in the first minute and forced vital capacity. Blood gas analysis was performed. In the control group, arterial oxygenation was evaluated by peripheral oxygen saturation by pulse oximetry. RESULTS Of the 55 patients (75% men, 51 ± 12.77 years), 11 were Child A (73% men, 52 ± 14.01 years), 23 were Child B (75% men, 51 ± 12.77 years), and 21 were Child C (95% men, 50 ± 12.09 years). The control group had 20 individuals (50% men, 47 ± 8.15 years). Pulmonary capacities and volumes by the parameters evaluated were within the normal range. Arterial blood gas analysis detected no hypoxemia, but a tendency to low partial gas pressure was noted. CONCLUSION In this population of cirrhotic patients the parameters of spirometry were normal in relation to the lung capacities and volumes in the different groups. No hypoxemia was detected, but a tendency to hypocapnia in the blood gas was noted.
Collapse
Affiliation(s)
- L Roque
- Medical School of Ribeirão Preto, University of São Paulo, Brazil
| | - A K Sankarankutty
- Hepatic Transplantation Unit, Department of Surgery and Anatomy, Medical School of Ribeirão Preto, University of São Paulo, Brazil
| | - O C Silva
- Hepatic Transplantation Unit, Department of Surgery and Anatomy, Medical School of Ribeirão Preto, University of São Paulo, Brazil
| | - E D Mente
- Hepatic Transplantation Unit, Department of Surgery and Anatomy, Medical School of Ribeirão Preto, University of São Paulo, Brazil.
| |
Collapse
|
11
|
Padilla L, Dakhel S, Adan J, Masa M, Martinez JM, Roque L, Coll T, Hervas R, Calvis C, Llinas L, Buenestado S, Castellsague J, Messeguer R, Mitjans F, Hernandez JL. S100A7: from mechanism to cancer therapy. Oncogene 2017; 36:6749-6761. [PMID: 28825725 DOI: 10.1038/onc.2017.283] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 06/02/2017] [Accepted: 07/08/2017] [Indexed: 12/21/2022]
Abstract
Within the tumor, malignant and stromal cells support each other by secreting a wide variety of growth factors and cytokines, allowing tumor growth and disease progression. The identification and regulation of those key factors in this crosstalk has opened the opportunity to develop new therapeutic strategies that not only act on the tumor cells but also on the stroma. Among these factors, S100A7 protein has gained interest in the last years. With key roles in cell motility its expression correlates with increased tumor growth, angiogenesis and metastatic potential. This work aims to deepen in the role played by extracellular S100A7 in the tumor microenvironment, offering a new integrative insight of its mechanism of action on each cellular compartment (tumor, endothelial, immune and fibroblast). As a result, we demonstrate its implication in cell migration and invasion, and its important contribution to the formation of a proinflammatory and proangiogenic environment that favors tumor progression and metastasis. Furthermore, we define its possible role in the pre-metastatic niche formation. Considering the relevance of S100A7 in cancer progression, we have developed neutralizing monoclonal antibodies, reporting for the first time the proof of principle of this promising therapeutic strategy for cancer treatment.
Collapse
Affiliation(s)
- L Padilla
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - S Dakhel
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - J Adan
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - M Masa
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - J M Martinez
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - L Roque
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - T Coll
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - R Hervas
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - C Calvis
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - L Llinas
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - S Buenestado
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - J Castellsague
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - R Messeguer
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - F Mitjans
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| | - J L Hernandez
- Biomed Division, LEITAT Technological Center, Barcelona, Spain
| |
Collapse
|
12
|
Castro P, Roque L, Magalhães J, Sobrinho-Simões M. A Subset of the Follicular Variant of Papillary Thyroid Carcinoma Harbors the PAX8-PPARγ Translocation. Int J Surg Pathol 2016; 13:235-8. [PMID: 16086077 DOI: 10.1177/106689690501300301] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The occurrence of the PAX8-PPARγ fusion gene is thought to be restricted to follicular tumors (adenomas and carcinomas) of the thyroid (FTA and FTC). Using interphase fluorescent in situ hybridization (FISH), together with recombinant tissue-type polymerase chain reaction (RT-PCR) and immunohistochemistry, we detected the PAX8-PPARγ translocation in 4 of 8 cases of the follicular variant of papillary thyroid carcinoma (FVPTC) exclusively or almost exclusively (>95%) composed of follicles. The 4 tumors with the translocation were larger and apparently more invasive than the remaining tumors, but the series is too small to allow a statistically meaningful comparison of the data. Our findings show that follicular thyroid carcinoma (PTC) may also harbor the PAX8-PPARγ fusion gene and indicate that a subset of FVPTC shares some molecular features of FTA and FTC.
Collapse
MESH Headings
- Adenocarcinoma, Follicular/genetics
- Adenocarcinoma, Follicular/metabolism
- Adenocarcinoma, Follicular/pathology
- Adenocarcinoma, Papillary/genetics
- Adenocarcinoma, Papillary/metabolism
- Adenocarcinoma, Papillary/pathology
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- Humans
- Immunoenzyme Techniques
- Immunohistochemistry
- In Situ Hybridization, Fluorescence
- Nuclear Proteins/genetics
- Nuclear Proteins/metabolism
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- PAX8 Transcription Factor
- PPAR gamma/genetics
- PPAR gamma/metabolism
- Paired Box Transcription Factors
- RNA, Messenger/metabolism
- RNA, Neoplasm/analysis
- Reverse Transcriptase Polymerase Chain Reaction
- Thyroid Neoplasms/genetics
- Thyroid Neoplasms/metabolism
- Thyroid Neoplasms/pathology
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Translocation, Genetic
Collapse
Affiliation(s)
- Patrícia Castro
- IPATIMUP, Institute of Pathology Molecular and Immunology of the University of Porto, Portugal
| | | | | | | |
Collapse
|
13
|
Faria C, Miguéns J, Antunes JL, Salgado D, Nunes S, Barroso C, Martins MDC, Nunes VM, Roque L. Pediatric brain tumors: genetics and clinical outcome. J Neurosurg Pediatr 2010; 5:263-70. [PMID: 20192643 DOI: 10.3171/2009.10.peds09240] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
OBJECT In this paper the authors' goal was to investigate the genetic characteristics of primary brain tumors in children and determine their influence on clinical outcome. METHODS The authors performed high-resolution comparative genomic hybridization studies in 14 low-grade and 12 high-grade brain neoplasms in 26 children who underwent surgery between 2005 and 2007. RESULTS Complex comparative genomic hybridization alterations were observed in 2 (14.3%) of the 14 lowgrade lesions and in 8 (66.6%) of the 12 high-grade lesions. High-level amplifications of DNA were detected in 3 cases, namely in a desmoplastic medulloblastoma where a c-Myc amplification was found. Gains of 1q were detected in 2 low-grade and 6 high-grade lesions that were classified as ependymomas, astrocytomas, oligodendrogliomas, oligoastrocytomas, and gangliogliomas. When the authors correlated genetics with outcome, they noted that among the low-grade neoplasms only the 2 patients who presented with complex comparative genomic hybridization alterations had to undergo reoperation because of recurrent disease. The patient with c-Myc amplification died of progressive disease. Gains of 1q were only observed in tumor cases with progressive disease. CONCLUSIONS Complex genetic alterations are indicative of a less favorable outcome in low-grade tumors. In these cases, closer follow-up should be pursued. The authors corroborate that c-Myc amplification is a marker of poor prognosis in medulloblastomas. In this study, they were able to verify that a 1q gain correlates with a poor clinical outcome, independent of tumor grade and histological type. The authors propose that it may be considered a common marker of poor prognosis in these neoplasms.
Collapse
Affiliation(s)
- Claudia Faria
- Department of Neurosurgery, Hospital de Santa Maria, Lisbon, Portugal
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Boonstra JJ, van Marion R, Beer DG, Lin L, Chaves P, Ribeiro C, Pereira AD, Roque L, Darnton SJ, Altorki NK, Schrump DS, Klimstra DS, Tang LH, Eshleman JR, Alvarez H, Shimada Y, van Dekken H, Tilanus HW, Dinjens WNM. Verification and unmasking of widely used human esophageal adenocarcinoma cell lines. J Natl Cancer Inst 2010; 102:271-4. [PMID: 20075370 DOI: 10.1093/jnci/djp499] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
For decades, hundreds of different human tumor type-specific cell lines have been used in experimental cancer research as models for their respective tumors. The veracity of experimental results for a specific tumor type relies on the correct derivation of the cell line. In a worldwide effort, we verified the authenticity of all available esophageal adenocarcinoma (EAC) cell lines. We proved that the frequently used cell lines SEG-1 and BIC-1 and the SK-GT-5 cell line are in fact cell lines from other tumor types. Experimental results based on these contaminated cell lines have led to ongoing clinical trials recruiting EAC patients, to more than 100 scientific publications, and to at least three National Institutes of Health cancer research grants and 11 US patents, which emphasizes the importance of our findings. Widespread use of contaminated cell lines threatens the development of treatment strategies for EAC.
Collapse
Affiliation(s)
- Jurjen J Boonstra
- Department of Pathology, Josephine Nefkens Institute, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Foreid H, Barroso C, Carvalho H, Morgado C, Roque L, Pimentel J. A 22-year-old man with intracraneal hypertension and impaired sensation over the perineum and left foot. Brain Pathol 2009; 19:735-8. [PMID: 19744046 DOI: 10.1111/j.1750-3639.2009.00312.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Primary leptomeningeal tumors are rare and can have multiple origins. This young man presented an intracranial hypertension syndrome and brain MRI features of diffuse leptomeningeal enhancement over cerebral and cerebellar hemispheres. A second cerebellar biopsy allowed the diagnosis of a primary diffuse leptomeningeal Primitive Neuroectodermal Tumor (PNET). Besides the paucity of reports of primary leptomeningeal PNET, its differentiation from primary leptomeningeal medulloblastomas is not always clear-cut and is discussed.
Collapse
|
16
|
Correia da Fonseca I, Fernandes A, Roque L, Pinto C, Filipe P, Marques Gomes M. Biphasic synovial sarcoma. J Eur Acad Dermatol Venereol 2008; 23:480-2. [PMID: 18761552 DOI: 10.1111/j.1468-3083.2008.02927.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
17
|
Faria C, Miguéns J, Antunes JL, Barroso C, Pimentel J, Martins MDC, Moura-Nunes V, Roque L. Genetic alterations in a papillary glioneuronal tumor. J Neurosurg Pediatr 2008; 1:99-102. [PMID: 18352813 DOI: 10.3171/ped-08/01/099] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Papillary glioneuronal tumors (PGNTs) are rare lesions of the central nervous system, and no information exists on the genetic alterations in these neoplasms. The authors report on such a case in a child. Genetic studies revealed that the tumor was characterized by gains and structural alterations involving only chromosome 7 with breakpoints at 7p22. By using comparative genomic hybridization, the authors observed a high-level amplification region at 7p14~q12. Fluorescence in situ hybridization with a probe for EGFR revealed that this gene was not amplified. Similar to other patients with PGNTs, the patient in the present case fared well. From a genetic point of view the data in the present case are in accordance with previous findings of EGFR amplifications as uncommon in low-grade gliomas and gangliogliomas. Recurrent rearrangements of chromosome 7 have been noted in other mixed glioneuronal tumors. The data in this case suggest that genes located at chromosome 7 can also be involved in the pathogenesis of PGNT. In clinical terms it will be especially important to corroborate, through the analysis of further cases, the involvement of the chromosome 7p22 locus, a region where glial and neuronal linked genes (RAC1 and NXPH1) are known to be located.
Collapse
Affiliation(s)
- Claudia Faria
- Department of Neurosurgery, Hospital de Santa Maria, Lisbon, Portugal
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Rodrigues R, Roque L, Espadinha C, Pinto A, Domingues R, Dinis J, Catarino A, Pereira T, Leite V. Comparative genomic hybridization, BRAF, RAS, RET, and oligo-array analysis in aneuploid papillary thyroid carcinomas. Oncol Rep 2007. [DOI: 10.3892/or.18.4.917] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
|
19
|
Rodrigues R, Roque L, Espadinha C, Pinto A, Domingues R, Dinis J, Catarino A, Pereira T, Leite V. Comparative genomic hybridization, BRAF, RAS, RET, and oligo-array analysis in aneuploid papillary thyroid carcinomas. Oncol Rep 2007; 18:917-26. [PMID: 17786355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023] Open
Abstract
Aneuploidy in papillary thyroid carcinomas (PTCs) is considered a marker of worse prognosis. Multiple genetic surveys have been performed in PTCs, however, we are not aware of any such studies in aneuploid PTCs. In order to contribute to a better comprehension of the genetic basis of this neoplasm's more aggressive behaviour in 17 aneuploid PTCs we performed a comparative genomic hybridization (CGH) analysis, studied the BRAF and RAS mutational status, searched for RET/PTC1 and RET/PTC3 rearrangements and determined their expression profile. Array results were validated by TaqMan and immunohistochemistry. CGH revealed multiple non-random chromosomal abnormalities. BRAFV600E and RAS mutations were found in 41.2% and 33% of the carcinomas respectively. None of the studied cases presented RET/PTC1 or RET/PTC3 rearrangement. When comparing array data with the chromosomal, mutational and clinical data we found that: a) loss of control of cellular transcription was of major relevance in this group of neoplasms, HMGA2 being one of the most overexpressed genes; b) gene expression correlated with the mutational status of PTCs, as in BRAF+ cases cMET and FN1 were concomitantly overexpressed; and c) death from disease and distant metastasis was associated to the overexpression of DDR2 and to the down-regulation of genes involved in immune, inflammatory response, signal transduction and cell adhesion processes. In conclusion we have identified in aneuploid PTCs a group of significantly altered molecules that may represent preferential targets for the development of new more efficient therapies in this type of cancer.
Collapse
MESH Headings
- Adenocarcinoma, Follicular/genetics
- Adenocarcinoma, Follicular/metabolism
- Adenocarcinoma, Follicular/pathology
- Adult
- Aged
- Aged, 80 and over
- Aneuploidy
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Carcinoma, Papillary/genetics
- Carcinoma, Papillary/metabolism
- Carcinoma, Papillary/pathology
- Discoidin Domain Receptors
- Female
- Flow Cytometry
- Gene Expression Profiling
- Gene Rearrangement
- Genes, ras/genetics
- Humans
- Immunoenzyme Techniques
- Male
- Middle Aged
- Nucleic Acid Hybridization
- Oligonucleotide Array Sequence Analysis
- Proto-Oncogene Proteins B-raf/genetics
- Proto-Oncogene Proteins B-raf/metabolism
- Proto-Oncogene Proteins c-raf/genetics
- Proto-Oncogene Proteins c-ret/genetics
- Receptor Protein-Tyrosine Kinases/genetics
- Receptors, Mitogen/genetics
- Reverse Transcriptase Polymerase Chain Reaction
- Thyroid Neoplasms/genetics
- Thyroid Neoplasms/metabolism
- Thyroid Neoplasms/pathology
Collapse
Affiliation(s)
- Raquel Rodrigues
- Cytogenetic Laboratory, CIPM, Portuguese Cancer Institute, 1099-023 Lisbon, Portugal
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Rodrigues RF, Roque L, Krug T, Leite V. Poorly differentiated and anaplastic thyroid carcinomas: chromosomal and oligo-array profile of five new cell lines. Br J Cancer 2007; 96:1237-45. [PMID: 17406368 PMCID: PMC2360140 DOI: 10.1038/sj.bjc.6603578] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [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] [Indexed: 12/02/2022] Open
Abstract
Information on gene alterations associated to poorly differentiated (PDTC) and anaplastic thyroid carcinomas (ATC) is scarce. Using human cancer cell lines as a tool for gene discovery, we performed a cytogenetic and oligo-array analysis in five new cell lines derived from two PDTC and three ATC. In PDTC we evidenced, as important, the involvement of the MAPK/ERK kinase pathway, and downregulation of a group of suppressor genes that include E-cadherin. In ATC, downregulation of a specific group of oncosuppressor genes was also observed. Our ATC cell lines presented chromosomal markers of gene amplification, and we were able to identify for the first time the nature of the involved amplicon target genes. We found that the main molecular differences between the two cell line types were related to signal transduction pathways, cell adhesion and motility process. TaqMan experiments performed for five amplicon target genes and for two genes, which allowed a clear distinction between ATC and PDTC: CDH13 and PLAU corroborated array results, not only in the cell lines, but also in an additional set of primary 14 PDTC and three ATC. We suggest that our findings may represent new tools for the development of more effective therapies to the hitherto untreatable ATC.
Collapse
Affiliation(s)
- R F Rodrigues
- Cytogenetic Laboratory, Centro de Immunologia e Patologia Molecular, Portuguese Cancer Institute, R. Professor Lima Basto, Lisbon, Portugal
| | - L Roque
- Cytogenetic Laboratory, Centro de Immunologia e Patologia Molecular, Portuguese Cancer Institute, R. Professor Lima Basto, Lisbon, Portugal
- E-mail:
| | - T Krug
- Gene Express, Lda, Taguspark, Oeiras, Portugal
| | - V Leite
- Valeriano Leite: Molecular Endocrinology Laboratory, Centro de Immunologia e Patologia Molecular, Portuguese Cancer Institute, R. Professor Lima Basto, Lisbon, Portugal
| |
Collapse
|
21
|
Roque L, Lacerda A, Rodrigues R, Almeida O, Salgueiro J, Pinto C. CGH evaluation of two de novo synchronous tumors in a child with a germline p53 mutation. Pediatr Blood Cancer 2006; 47:949-54. [PMID: 16206219 DOI: 10.1002/pbc.20603] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We report the case of a child who developed two de novo synchronous tumors: an osteosarcoma and an embryonal rhabdomyosarcoma. The patient was determined to be a de novo carrier of a P53 germline mutation. Comparative genomic hybridization (CGH) analysis revealed that each of the neoplasms was characterized by a specific set of chromosomal imbalances and high-level amplification (HLA) regions. Our CGH findings provide evidence that cancer development is a cellular/organ specific event.
Collapse
Affiliation(s)
- Lúcia Roque
- Cytogenetic Laboratory, CIPM, Portuguese Cancer Institute, Lisbon, Portugal.
| | | | | | | | | | | |
Collapse
|
22
|
Pinto AE, Roque L, Rodrigues R, André S, Soares J. Frequent 7q gains in flow cytometric multiploid/hypertetraploid breast carcinomas: a study of chromosome imbalances by comparative genomic hybridisation. J Clin Pathol 2006; 59:367-72. [PMID: 16461572 PMCID: PMC1860365 DOI: 10.1136/jcp.2005.027722] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To investigate underlying genetic events associated with complex DNA ploidy breast carcinomas. METHODS Screening for chromosome imbalances was carried out using comparative genomic hybridisation (CGH) in 14 frozen samples of tumour from a series of 13 breast cancer patients with multiploid (n = 11) and hypertetraploid (n = 2) tumours. They had previously been analysed by DNA flow cytometry and also assessed immunohistochemically for p53 tissue expression. Ploidy status was determined on frozen samples using the Multicycle software program. RESULTS The total number of copy gains (n = 242) was significantly greater than the number of copy losses (n = 51). The mean (SD) number of gains per sample was 17.3 (5.7), and of losses, 3.6 (4.2) (p = 0.0001). Gains of chromosomal regions at 1q (14/14; 100%), 7q (12/14; 85.7%), and 3q (11/14; 78.6%), as well as 1p, 2q, 5p, 8q, and 13q (10/14; 71.4%) were the most frequent aberrations in this series. Losses were most commonly found on 17p (5/14; 35.7%). Three patients dying of the disease had tumours with high level amplifications at 1q12-qter, 3q22-q25, and 8q22-q23 regions. Six cases had p53 overexpression, of whom four showed 12q gains and two showed 17p losses. CONCLUSIONS There is a very high incidence of genetic aberrations, mainly related to chromosomal gains, in this subgroup of aneuploid breast cancer patients, associated with a poor clinical outcome. The 7q locus, not previously reported as showing frequent changes in breast cancer, was found to be a potential site for some candidate oncogenes.
Collapse
Affiliation(s)
- A E Pinto
- Department of Pathology, CROL, SA, Lisbon, Portugal.
| | | | | | | | | |
Collapse
|
23
|
Castro P, Rebocho AP, Soares RJ, Magalhães J, Roque L, Trovisco V, Vieira de Castro I, Cardoso-de-Oliveira M, Fonseca E, Soares P, Sobrinho-Simões M. PAX8-PPARgamma rearrangement is frequently detected in the follicular variant of papillary thyroid carcinoma. J Clin Endocrinol Metab 2006; 91:213-20. [PMID: 16219715 DOI: 10.1210/jc.2005-1336] [Citation(s) in RCA: 207] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT The clinicopathological characteristics and the molecular features of the follicular variant of papillary thyroid carcinoma (FVPTC) remain controversial. OBJECTIVE/DESIGN/PATIENTS In an attempt to clarify such controversies and to find whether or not FVPTC cases share the molecular features of follicular tumors, we searched for the presence of PAX8-PPARgamma rearrangements, RAS mutations, and RAP-1, RAF-1, and BRAF mutations in a series of 40 FVPTCs as well as in 27 follicular thyroid carcinomas (FTCs) and 12 follicular thyroid adenomas (FTAs). Fluorescence in situ hybridization and RT-PCR were used to detect the PAX8-PPARgamma rearrangement and PCR, single strand confirmational polymorphism, and sequencing for searching the mutations. RESULTS The frequency of PAX8-PPARgamma rearrangement was similar in FVPTCs (37.5%), FTCs (45.5%), and FTAs (33.3%). The same holds true regarding the frequency and type of RAS mutations: FVPTC, 25.0%; FTC, 22.2%; and FTA, 33.3%. BRAF mutations were only detected in FVPTC (10%); the BRAF mutations in these cases (K601E and G474R) are different from the typical BRAF(V600E) mutation of conventional PTCs. No mutations were detected in RAP-1 and RAF-1. In FVPTCs, the PAX8-PPARgamma rearrangement was significantly associated with multifocality and vascular invasion, whereas the RAS mutations were significantly associated with the large tumor size. There were three cases of FVPTC, three FTCs and one FTA, harboring both PAX8-PPARgamma rearrangement and RAS mutations; patients with such tumors were usually very young. CONCLUSIONS We conclude that a subset of FVPTC shares some of the molecular features of follicular tumors. Further studies are necessary to clarify the putative clinical significance (e.g. association to blood-born metastases) of PAX8-PPARgamma rearrangement, RAS mutations, and BRAF(K601E) in FVPTCs.
Collapse
Affiliation(s)
- P Castro
- Institute of Molecular Pathology and Immunology of the University of Porto, 4200-465 Porto, Portugal
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Martins C, Fonseca I, Roque L, Pereira T, Ribeiro C, Bullerdiek J, Soares J. PLAG1 gene alterations in salivary gland pleomorphic adenoma and carcinoma ex-pleomorphic adenoma: a combined study using chromosome banding, in situ hybridization and immunocytochemistry. Mod Pathol 2005; 18:1048-55. [PMID: 15920557 DOI: 10.1038/modpathol.3800386] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Pleomorphic adenoma is the most common benign tumor of the salivary glands. It has marked histological diversity with epithelial, myoepithelial and mesenchymal-type cells arranged in a variety of architectural and differentiation patterns. Pleomorphic adenoma gene 1 (PLAG1), shown to be consistently rearranged in pleomorphic adenomas, is activated by chromosomal translocations involving 8q12, the chromosome region that is most frequently affected in these tumors. In this study, we evaluated PLAG1 involvement in salivary gland tumorigenesis by determining the frequency of its alterations in a selected group of 20 salivary gland tumors: 16 pleomorphic adenomas and four carcinomas ex-pleomorphic adenoma, having in common the presence of karyotypic chromosome 8 deviations, either structural, with 8q12 rearrangements, or numerical, with gain of chromosome 8. PLAG1 status was analyzed using in situ hybridization techniques, on metaphase cells, by fluorescence detection and/or interphase cells in paraffin sections, by chromogenic detection. Except for one pleomorphic adenoma case (5%) that lacked PLAG1 involvement, 17 tumors (85%), (14 pleomorphic adenomas and three carcinomas ex-pleomorphic adenoma) showed intragenic rearrangements of PLAG1 and the remaining two cases (10%), (one pleomorphic adenoma and one carcinoma ex-pleomorphic adenoma), had chromosome trisomy 8 only. To further investigate the role of PLAG1 on pleomorphic adenomas tumorigenesis, as well as the putative morphogenesis mechanism, we attempted to identify the cell types (epithelial vs myoepithelial) carrying 8q12/PLAG1 abnormalities by a combined phenotypic/genotypic analysis in four cases (three pleomorphic adenoma and one carcinoma ex-pleomorphic adenoma) characterized by 8q12 translocations and PLAG1 rearrangement. In these cases, both cells populations carried PLAG1 rearrangements. This finding further supports the pluripotent single-cell theory, which postulates that the tumor-initiated, modified myoepithelial cell, evolves into the varied somatic cell phenotypes present in pleomorphic adenoma, and reinforces the role of PLAG1 on the tumorigenesis of benign and malignant pleomorphic adenoma.
Collapse
MESH Headings
- Adenoma, Pleomorphic/genetics
- Adenoma, Pleomorphic/metabolism
- Adenoma, Pleomorphic/pathology
- Adult
- Aged
- Aged, 80 and over
- Chromosome Banding
- Chromosomes, Human, Pair 3/genetics
- Chromosomes, Human, Pair 5/genetics
- Chromosomes, Human, Pair 8/genetics
- Chromosomes, Human, Pair 9/genetics
- DNA-Binding Proteins/analysis
- DNA-Binding Proteins/genetics
- Female
- Genotype
- Humans
- Immunohistochemistry
- In Situ Hybridization/methods
- In Situ Hybridization, Fluorescence
- Karyotyping
- Male
- Middle Aged
- Phenotype
- Salivary Gland Neoplasms/genetics
- Salivary Gland Neoplasms/metabolism
- Salivary Gland Neoplasms/pathology
- Translocation, Genetic
Collapse
Affiliation(s)
- Carmo Martins
- Centro de Investigação de Patobiologia Molecular (CIPM), Instituto Português de Oncologia de Francisco Gentil, Lisboa, Portugal.
| | | | | | | | | | | | | |
Collapse
|
25
|
Abstract
PURPOSE A 68-year-old man with metastatic follicular thyroid carcinoma had T3 hyperthyroidism. MATERIAL AND METHODS A bone scan showed intense uptake in the thyroid and multiple areas of increased uptake in the skeleton. Hyperthyroidism persisted after total thyroidectomy. Treatment with I-131 induced a transient state of euthyroidism lasting approximately 9 months. Further tumor growth and relapse of hyperthyroidism eventually occurred and the patient died 25 months after surgery. Molecular and cytogenetic analyses were performed. RESULTS No mutations were detected of either of the thyrotropin receptor or of the alpha subunit of the stimulatory guanine-nucleotide-binding proteins. Hyperthyroidism was unlikely the result of thyroid-stimulating receptor antibodies. Comparative genomic hybridization analysis showed that the tumor was characterized by multiple chromosomal imbalances. CONCLUSIONS This is an unusual case of follicular thyroid carcinoma with initial high I-131 uptake by the thyroid and bone metastases and concurrent hyperthyroidism. Despite the increased I-131 uptake in the tumor, I-131 treatment only transiently controlled the hyperthyroidism and had no effect on tumor size. The cause of hyperthyroidism remained unknown. T3 predominance was unlikely the result of type 2 deiodinase overexpression because loss of genetic material was demonstrated at chromosome 14 long arm, where type 2 deiodinase is mapped.
Collapse
Affiliation(s)
- Francisco Rosário
- Serviço de Endocrinologia, Instituto Português de Oncologia Francisco Gentil, CROL, SA, Lisboa, Portugal.
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Marques AR, Espadinha C, Frias MJ, Roque L, Catarino AL, Sobrinho LG, Leite V. Underexpression of peroxisome proliferator-activated receptor (PPAR)gamma in PAX8/PPARgamma-negative thyroid tumours. Br J Cancer 2004; 91:732-8. [PMID: 15238980 PMCID: PMC2364771 DOI: 10.1038/sj.bjc.6601989] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The expression of peroxisome proliferator-activated receptor (PPAR)γ in thyroid neoplasias and in normal thyroid (NT) tissues has not been fully investigated. The objectives of the present work were: to study and compare the relative expression of PPARγ in normal, benign and malignant thyroid tissues and to correlate PPARγ immunostaining with clinical/pathological features of patients with thyroid cancer. We analysed the expression of PPARγ in several types of thyroid tissues by reverse transcription–polymerase chain reaction (RT–PCR), interphase fluorescent in situ hybridisation, real-time RT–PCR and immunohistochemistry. We have demonstrated that NT tissues express PPARγ both at mRNA and at protein level. PAX8-PPARγ fusion gene expression was found in 25% (six of 24) of follicular thyroid carcinomas (FTCs) and in 17% (six of 36) of follicular thyroid adenomas, but in none of the 10 normal tissues, 28 nodular hyperplasias, 38 papillary thyroid carcinomas (PTCs) and 11 poorly differentiated thyroid carcinomas (PDTCs). By real-time RT–PCR, we observed that tumours negative for the PAX8-PPARγ rearrangement expressed lower levels of PPARγ mRNA than the NT. Overexpression of PPARγ transcripts was detected in 80% (four of five) of translocation-positive tumours. Diffuse nuclear staining was significantly (P<0.05) less prevalent in FTCs (53%; 18 of 34), PTCs (49%; 19 of 39) and PDTCs (0%; zero of 13) than in normal tissue (77%; 36 of 47). Peroxisome proliferator-activated receptorγ-negative FTCs were more likely to be locally invasive, to persist after surgery, to metastasise and to have poorly differentiated areas. Papillary thyroid carcinomas with a predominantly follicular pattern were more often PPARγ negative than classic PTCs (80% vs 28%; P=0.01). Our results demonstrated that PPARγ is underexpressed in translocation-negative thyroid tumours of follicular origin and that a further reduction of PPARγ expression is associated with dedifferentiation at later stages of tumour development and progression.
Collapse
Affiliation(s)
- A R Marques
- Centro de Investigação de Patobiologia Molecular, Instituto Português de Oncologia Francisco Gentil, Rua Professor Lima Basto, 1099-023 Lisboa Codex, Portugal
| | - C Espadinha
- Centro de Investigação de Patobiologia Molecular, Instituto Português de Oncologia Francisco Gentil, Rua Professor Lima Basto, 1099-023 Lisboa Codex, Portugal
| | - M J Frias
- Centro de Investigação de Patobiologia Molecular, Instituto Português de Oncologia Francisco Gentil, Rua Professor Lima Basto, 1099-023 Lisboa Codex, Portugal
| | - L Roque
- Centro de Investigação de Patobiologia Molecular, Instituto Português de Oncologia Francisco Gentil, Rua Professor Lima Basto, 1099-023 Lisboa Codex, Portugal
| | - A L Catarino
- Departamento de Patologia Morfológica; Instituto Português de Oncologia Francisco Gentil, Rua Professor Lima Basto, 1099-023 Lisboa Codex, Portugal
| | - L G Sobrinho
- Centro de Investigação de Patobiologia Molecular, Instituto Português de Oncologia Francisco Gentil, Rua Professor Lima Basto, 1099-023 Lisboa Codex, Portugal
| | - V Leite
- Centro de Investigação de Patobiologia Molecular, Instituto Português de Oncologia Francisco Gentil, Rua Professor Lima Basto, 1099-023 Lisboa Codex, Portugal
- Centro de Investigação de Patobiologia Molecular, Instituto Português de Oncologia Francisco Gentil, Rua Professor Lima Basto, 1099-023 Lisboa Codex, Portugal. E-mail:
| |
Collapse
|
27
|
Tejuca M, Díaz I, Figueredo R, Roque L, Pazos F, Martínez D, Iznaga-Escobar N, Pérez R, Alvarez C, Lanio ME. Construction of an immunotoxin with the pore forming protein StI and ior C5, a monoclonal antibody against a colon cancer cell line. Int Immunopharmacol 2004; 4:731-44. [PMID: 15135315 DOI: 10.1016/j.intimp.2004.02.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2003] [Revised: 08/01/2003] [Accepted: 02/19/2004] [Indexed: 10/26/2022]
Abstract
Sticholysin I (StI), a potent cytolysin isolated from the sea anemone Stichodactyla helianthus, was linked to the monoclonal antibody (mAb) ior C5. StI acts by forming hydrophilic pores in the membrane of the attacked cells leading to osmotic lysis. ior C5 is a murine IgG1, which recognizes the tumor associated antigen (TAA) ior C2. The cytolysin and the mAb were coupled by using the heterobifunctional cross-linking reagent sulfosuccinimidyl 4-(N-maleimidomethyl)-cyclohexane-1-carboxylate (SMCC). Two hybrid molecules composed by one ior C5 and one or two StI molecules were obtained (named conjugated I and II, respectively). The purified conjugates were evaluated by a binding affinity assay against an ior C2-positive colon cancer cell line (SW948). Both molecules were able to recognize the antigen (Ag) in the same way that unconjugated ior C5 does. The activity of both conjugates against human erythrocytes and SW948 cells was assessed. They lost most of their hemolytic activity but their residual activity was very similar. Nevertheless, when their cytotoxicity was studied on the SW948 cell line, only conjugate II killed efficiently the cells, indicating a specific mAb-Ag interaction. In this chimeric molecule the ratio between the cytotoxic and the hemolytic activity was larger than that of the free cytolysin. This fact indicates an increase of the specificity of the toxic effect toward the SW948 cell line and consequently an increase of the difference between its hemolytic and cytotoxic doses. The results herein support the feasibility of directing StI to the surface of cancer cells expressing ior C2 Ag via the mAb ior C5.
Collapse
Affiliation(s)
- M Tejuca
- Centro de Estudios de Proteínas y Departamento de Bioquímica, Facultad de Biologia, Universidad de La Habana, Cuba.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Roque L, Rodrigues R, Martins C, Ribeiro C, Ribeiro MJ, Martins AG, Oliveira P, Fonseca I. Comparative genomic hybridization analysis of a pleuropulmonary blastoma. ACTA ACUST UNITED AC 2004; 149:58-62. [PMID: 15104284 DOI: 10.1016/s0165-4608(03)00284-x] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2003] [Revised: 06/27/2003] [Accepted: 07/08/2003] [Indexed: 01/10/2023]
Abstract
Pleuropulmonary blastoma (PPB) is a rare, aggressive dysontogenetic tumor of childhood. We report the comparative genomic hybridization (CGH) study performed on a case of PPB in a 3-year-old-boy. The tumor was characterized by several chromosomal imbalances. Gains observed affected regions: 1q12-q23, 3q23-qter, 8pter-q24.1, 9p13-q21, 17p12-p11, 17q11-q22, 17q23-q25, 19pter-p11, and 19q11-q13.3. Whole chromosome gains were detected at 2 and 7. Loss of genetic material was found at regions: 6q13-qter, 10pter-p13, 10q22-qter, and 20p13. To our knowledge, there have been no CGH reports on PPB, but it is interesting to note that 1) the alterations found confirm previous cytogenetic reports describing gains of chromosomes 2 and 8 as recurrent abnormalities in this type of tumor, suggesting that a gene or genes of putative relevance in PPB pathogenesis are mapped at 8p11-p12, and 2) the CGH profile of this case is very similar to those observed in embryonal rhabdomyosarcomas, in which gains of 2 or 2q, 7 or 7q, and 8 or 8p and loss of 10q22-qter are consistently found. This finding supports the hypothesis that PPB may be tumorigenetically related with embryonal rhabdomyosarcoma.
Collapse
Affiliation(s)
- Lúcia Roque
- Cytometry and Cytogenetic Laboratory, Center for Immunology and Molecular Pathology, Portuguese Cancer Institute, R. Prof. Lima Basto 1099-023, Lisbon, Portugal.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Lacave G, Eggermont M, Verslycke T, Brook F, Salbany A, Roque L, Kinoshita R. Prediction from ultrasonographic measurements of the expected delivery date in two species of bottlenosed dolphin (Tursiops truncatus and Tursiops aduncus). Vet Rec 2004; 154:228-33. [PMID: 15005447 DOI: 10.1136/vr.154.8.228] [Citation(s) in RCA: 22] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Ultrasonographic measurements were made at least once a month during 14 gestations in seven Tursiops truncatus and 12 gestations in five Tursiops aduncus (bottlenosed dolphins). The 121 measurements of the fetal biparietal diameter and 139 measurements of the fetal thoracic diameter in T truncatus and the 97 measurements of the biparietal diameter and 97 measurements of the thoracic diameter in Taduncus were used to establish regression lines for the increases in the diameter of the head and thorax of the fetus with time. From these relationships an easy-to-use computer program was developed to predict the date of birth of the two species of bottlenosed dolphin, and its predictions were compared with the actual dates of birth of other calves of both species. The births occurred within the range of predicted dates, and even when only a few measurements were available, the program provided accurate predictions.
Collapse
Affiliation(s)
- G Lacave
- Marine Mammal Veterinary Services, Betferkerklaan 158, B-8200 Brugge, Belgium
| | | | | | | | | | | | | |
Collapse
|
30
|
Abstract
The genetic alterations that underlie the progression of follicular thyroid carcinoma towards anaplasia are still largely uncharacterised. We compared the Comparative Genomic Hybridization (CGH) profiles of 20 follicular (FTCs), 12 poorly differentiated (PDTCs) and seven anaplastic thyroid carcinomas (ATCs), in order to identify the chromosomal imbalances potentially associated with cancer progression. We found: (i) when considering that a ‘direct’ transformation of FTC towards anaplasia occurs, the defined significantly important alterations were the increase of gains at 3q (P<0.05) and 20q (P<0.01), and the increase of losses at 7q (P<0.05) and Xp (P<0.01); (ii) regarding poorly differentiated carcinomas as an intermediate independent entity in the anaplastic transformation of follicular cancers, evidenced as important alterations towards anaplasia, were the proportional decrease in copy sequences at 7p, 7q, 12q and 13q resulting from the significant decrease of DNA gains at 7p and 12q (P<0.05), and the significant increase of losses at 7q and 13q (P<0.05). These results unveil the chromosomal regions where genes of interest in thyroid anaplastic transformation are to be located, and demonstrate that different gene dosage copy sequence imbalances are associated to the ‘direct’ pathway of transformation of follicular into anaplastic cancers and to the progressive FTC → PDTC → ATC pathway.
Collapse
Affiliation(s)
- R F Rodrigues
- Cytogenetic Laboratory, CIPM, Portuguese Cancer Institute, R. Prof Lima Basto 1099-023, Lisbon, Portugal
| | - L Roque
- Cytogenetic Laboratory, CIPM, Portuguese Cancer Institute, R. Prof Lima Basto 1099-023, Lisbon, Portugal
- Cytogenetic Laboratory, CIPM, Portuguese Cancer Institute, R. Prof Lima Basto 1099-023, Lisbon, Portugal. E-mail:
| | - J Rosa-Santos
- Head and Neck Surgery Department, Portuguese Cancer Institute. R. Prof Lima Basto 1099-023, Lisbon, Portugal
| | - O Cid
- Head and Neck Surgery Department, Portuguese Cancer Institute. R. Prof Lima Basto 1099-023, Lisbon, Portugal
| | - J Soares
- Pathology Department, Portuguese Cancer Institute. R. Prof Lima Basto 1099-023 Lisbon, Portugal
| |
Collapse
|
31
|
Abstract
We studied the clonality of medullary thyroid carcinomas (MTC) from 16 female patients by determining X chromosome inactivation by polymerase chain reaction (PCR) amplification of a CAG repeat in exon 1 of the human androgen-receptor gene. One patient with sporadic medullary thyroid carcinoma (MTC) was homozygous for this microsatellite and was not considered for the assessment of clonality. Sixteen tumor samples from the informative 15 patients were studied: 11 were from sporadic cases and 5 were from familial cases (3 cases of multiple endocrine neoplasia type 2A [MEN 2A]; 1 case of familial medullary thyroid carcinoma [FMTC]). Fourteen tumor samples (10/11 sporadic, 3/4 MEN 2A and 1/1 FMTC) were clearly monoclonal with allelic cleavage ratios between 2.5 and 49.1. Sixty-four percent of these cases (9/14) had the preferential amplification of the shorter allele while 36 percent (5/14) had the preferential amplification of the longer allele. Two frozen tumor samples (1 sporadic and 1 MEN 2A) were polyclonal. However, the corresponding tumor embedded in paraffin from the sporadic case was monoclonal. The other polyclonal tumor was found in the right thyroid lobe of a patient with MEN 2A who had a monoclonal tumor in the left lobe. Our results clearly demonstrate that MTC have a monoclonal origin in the majority of the cases.
Collapse
Affiliation(s)
- A R Marques
- Centro de Investigação de Patobiologia Molecular, Instituto Português de Oncologia Francisco Gentil, Lisboa, Portugal.
| | | | | | | | | | | | | |
Collapse
|
32
|
Abstract
BACKGROUND Cytogenetic studies performed in papillary thyroid carcinoma (PTC) identified chromosome 10q rearrangements with breakpoints at 10q11.2 as the most frequent aberrations in these tumors. In the current study, the authors aimed to identify other chromosomal abnormalities nonrandomly associated with papillary thyroid carcinomas. METHODS Cytogenetic analysis was performed on 94 papillary thyroid carcinomas after short-term culture of the tumors sterile fragments. RESULTS Clonal chromosomal changes were found in 37 tumors (40%). Structural cytogenetic abnormalities were observed in 18 carcinomas. Chromosomes 1, 3, 7, and 10 were the most frequently involved in rearrangements. Pooled results of the breakpoints detected in these tumors, as well as those described in the literature, allowed the authors to verify as the most common breakpoint loci 1p32-36, 1p11-13, 1q, 3p25-26, 7q34-36, and 10q11.2. The correlation between the karyotype features of the 94 PTCs and the histologic data revealed that some PTC follicular variants were characterized by chromosomal aberrations commonly found in thyroid follicular adenomas: a del(11)(q13q13), a t(2;3)(q13;p35), and gains of chromosomes 3, 5, 7, 9, 12, 14, 17, and 20. In the tall cell PTC variant group, 4 of the 7 tumors presented clonal cytogenetic changes, 3 (75%) of which were characterized by anomalies of chromosome 2 that lead to a overrepresentation of the long arm of this chromosome. Noted also in these series was an association between complex karyotypes and tumors with poorly differentiated histiotypes. CONCLUSIONS In this study, the authors report chromosome 1p32-36, 1p11-13, 3p25-26, and 7q32-36 as novel breakpoint cluster regions in PTC, and they suggest that there are cytogenetic changes preferentially associated with the follicular and tall cell PTC variants.
Collapse
Affiliation(s)
- L Roque
- Laboratório de Citogenética-Centro de Investigacão em Patologia Molecular Instituto Portugues de Oncologia de Francisco Gentil R. Prof. Lima Basto, Lisboa, Codex, Portugal.
| | | | | | | | | |
Collapse
|
33
|
Martins C, Fonseca I, Roque L, Ribeiro C, Soares J. Cytogenetic similarities between two types of salivary gland carcinomas: adenoid cystic carcinoma and polymorphous low-grade adenocarcinoma. Cancer Genet Cytogenet 2001; 128:130-6. [PMID: 11463451 DOI: 10.1016/s0165-4608(01)00416-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Adenoid cystic carcinoma (ACC) and polymorphous low-grade adenocarcinoma (PLGA) are low-grade adenocarcinomas of salivary glands with a putative common histogenesis from the intercalated ducts but featuring distinct histological appearances. Hybrid tumors containing areas with histological patterns of both neoplasms have been reported but, to our knowledge, the question of their genotypic similarity has not yet been approached. As part of an ongoing study on cytogenetic characterization of salivary gland tumors, from a group of 24 malignant neoplasms, three out of five cases of ACC and three of four cases of PLGA were selected for their similar karyotypic changes. All of them displayed chromosome 12 abnormalities, affecting the 12q12-q13 region in four (all ACC cases and one PLGA case), 12q22 in one PLGA case, and 12p12.3 in the remaining. From this group of neoplasms, one PLGA and one ACC showed the same t(6;12)(p21;q13). Our findings favor the concept that tumors of salivary glands displaying epithelial and myoepithelial phenotypes share a common histogenesis.
Collapse
Affiliation(s)
- C Martins
- Centro de Investigação de Patobiologia Molecular (CIPM), Instituto Português de Oncologia, Rua Prof. Lima Basto, 1099-023, Lisboa, Portugal
| | | | | | | | | |
Collapse
|
34
|
Baughman R, Edwards D, Roque L. Diagnostic quiz #46. Case no. 1. Squamous cell carcinoma. Todays FDA 2000; 12:20, 23. [PMID: 11404939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- R Baughman
- University of Florida Oral and Maxillofacial Pathology and Oncology, USA
| | | | | |
Collapse
|
35
|
Abstract
We report the finding of clonal chromosome abnormalities in 13 short-term cultured squamous cell carcinomas (SCCs) of the skin. Intratumor heterogeneity, in the form of cytogenetically related (subclones) or unrelated clones, was detected in six tumors. Whereas clones with complex karyotypic changes were found in 6 tumors, clones with simple anomalies were observed in 10 tumors, and sometimes these clones coexisted with highly abnormal clones. Rearrangement of chromosome 8, in the form of isochromosome i(8q) or whole arm translocation, was the most common aberration, found predominantly in complex clones. Another recurrent feature, i.e., the centromeric rearrangement of chromosome 1, as isochromosome i(1q) or i(1p), or whole arm translocations, was always part of a complex karyotype. Homogeneously staining regions were found in two cases, one with a highly complex karyotype and the other with a simple karyotype. In order to obtain an overall karyotypic picture in SCC of the skin, the cytogenetic findings in 10 SCCs reported earlier were reviewed. The chromosomes most commonly affected were, in decreasing order, chromosomes 1, 11, 8, 9, 5, 3, and 7. Chromosomal sites most frequently rearranged were almost all pericentromeric: they were 8q10-q11, 1p10-q12, 5p10-q11, 11p15, and 9p10-q10. Recurrent anomalies were i(1q), i(8q), i(5p), i(1p), i(9p), and i(9q). Among them, only i(8q) and i(9q) might be assumed to be early genetic events, considering the fact that they could occasionally be identified in simple clones. The most frequent losses included part of or the entire chromosomes 2, 4, 9, 11, 14, 18, and 21, arm 8p, and chromosomes X, Y, and 13. Overrepresentation most frequently involved 1q, chromosome 7, and 8q. The characteristic karyotypic pattern observed in skin SCC was in line with the experience in several other carcinomas. Genes Chromosomes Cancer 26:295-303, 1999.
Collapse
Affiliation(s)
- Y Jin
- Department of Clinical Genetics, University Hospital, Lund, Sweden.
| | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Roque L, Serpa A, Clode A, Castedo S, Soares J. Significance of trisomy 7 and 12 in thyroid lesions with follicular differentiation: a cytogenetic and in situ hybridization study. J Transl Med 1999; 79:369-78. [PMID: 10211989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
In a group of benign and malignant follicular thyroid lesions, previously analyzed by conventional cytogenetics, single- and double-target fluorescence in situ hybridization studies with pericentromeric probes specific for chromosomes 7 and 12 were performed, by using isolated nuclei from paraffin-embedded specimens of: 11 goiters, 21 adenomas, 9 follicular carcinomas, and adjacent normal thyroid tissue. Nonisotopic in situ hybridization with the same probes was used in 4-microm histologic sections of four follicular carcinomas. By fluorescence in situ hybridization analysis, the percentage of goiters, adenomas, and follicular carcinomas with gains of No. 7 was 18.2%, 52.4%, and 66.0%, respectively, and with gains of No. 12 was 9.0%, 42.9%, and 66.0%, respectively. The percentage of the same lesions (goiters, adenomas, carcinomas) exhibiting polysomies of No. 7 and No. 12, as assessed by cytogenetic analysis, was 5.0% and 0.0%, 20.0% and 20.0%, and 15.8% and 10.5%, respectively. Numerical alterations of these chromosomes were not observed in normal tissue. These findings reveal that gain of chromosomes 7 and 12 is a characteristic of the morphologically altered thyroid tissue; polysomies of chromosomes 7 and 12 are more frequent in thyroid lesions than it can be detected by conventional cytogenetic studies; the increasing frequency of polysomies of chromosomes 7 and 12 from hyperplastic lesions to benign and malignant tumors seem to substantiate the existence of a multistep pathway, ie, normal thyroid --> goiter --> adenoma --> follicular carcinoma in the pathogenesis of some thyroid neoplasms.
Collapse
Affiliation(s)
- L Roque
- CIPM, Portuguese Cancer Institute, and Medical Faculty of Porto
| | | | | | | | | |
Collapse
|
37
|
Roque L, Soares J, Castedo S. Cytogenetic and fluorescence in situ hybridization studies in a case of anaplastic thyroid carcinoma. Cancer Genet Cytogenet 1998; 103:7-10. [PMID: 9595037 DOI: 10.1016/s0165-4608(97)00302-6] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cytogenetic analysis of a case of anaplastic thyroid carcinoma revealed multiple numerical and structural chromosomal changes, including a der(9) add(9)(p22)hsr(9)(p?). Fluorescence in situ hybridization (FISH) studies performed to identify the genetic nature of this derivative chromosome showed that both the additional material and the hsr region were composed of only chromosome 9 sequences and that the C-ABL oncogene was not one of the genes harbored at the hsr region. We suggest that amplification of gene(s) located at chromosome 9, other than the C-ABL, may play a significant role in anaplastic evolution of thyroid carcinomas.
Collapse
Affiliation(s)
- L Roque
- Department of Morphologic Pathology, Instituto Português de Oncologia, Lisboa, Portugal
| | | | | |
Collapse
|
38
|
Roque L, Clode A, Belge G, Pinto A, Bartnitzke S, Santos JR, Thode B, Bullerdiek J, Castedo S, Soares J. Follicular thyroid carcinoma: chromosome analysis of 19 cases. Genes Chromosomes Cancer 1998; 21:250-5. [PMID: 9523201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Short-term cultures of 19 follicular thyroid carcinomas were examined cytogenetically. Clonal chromosomal changes were detected in 12 tumors. Two follicular carcinomas had only numerical alterations: one with a hyperdiploid karyotype with trisomies/polysomies of chromosomes 7 and 12, similar to the karyotypes previously identified in a sub-group of benign thyroid lesions, and the other with monosomy 20. In the remaining ten cases several structural chromosome anomalies were found. Loss of the short arm of chromosome 3 was observed in one tumor. In two widely invasive and metastasizing follicular carcinomas there was a t(7;8)(p15;q24) as the sole abnormality in one case and a der(8)t(7;8)(p15;q24) together with other cytogenetic alterations in the other case. This finding suggests that t(7;8)(p15;q24) may be related to an aggressive behavior of follicular thyroid carcinomas.
Collapse
Affiliation(s)
- L Roque
- CIPM-Portuguese Cancer Institute, Lisbon, Portugal
| | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Roque L, Clode A, Belge G, Pinto A, Bartnitzke S, Santos JR, Thode B, Bullerdiek J, Castedo S, Soares J. Follicular thyroid carcinoma: Chromosome analysis of 19 cases. Genes Chromosomes Cancer 1998. [DOI: 10.1002/(sici)1098-2264(199803)21:3<250::aid-gcc10>3.0.co;2-t] [Citation(s) in RCA: 30] [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] [Indexed: 11/07/2022] Open
|
40
|
Belge G, Roque L, Thode B, Fonseca E, Soares J, Clode A, Bartnitzke S, Castedo S, Bullerdiek J. [Cytogenetic changes in benign thyroid gland hyperplasias and adenomas correlated with histology]. Verh Dtsch Ges Pathol 1998; 81:151-6. [PMID: 9474866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In order to elucidate cytogenetic changes associated with the development of benign growth of follicular epithelial cells of the thyroid, cytogenetic analyses were performed on 340 follicular thyroid adenomas and goiters after short-term culture. Clonal chromosome changes were found in 67 cases. Trisomy 7 as the sole abnormality or along with other trisomies was the most frequent type of aberration (19 cases). Other recurrent numerical changes were loss of chromosome 22 (4 cases) and the second X or the Y chromosome (5 cases). Translocations involving 19q13 (12 cases) were frequent structural chromosome changes. After a histopathological classification of all cases, we have correlated the cytogenetic findings with the histology of the tumors. Only 8.4% of the goiters showed clonal abnormalities whereas 44.9% of the adenomas revealed clonal abnormalities. Furthermore, simple clonal changes were predominantly found in goiters and complex changes in adenomas. The most impressive correlation was found in the group of lesions with trisomy 7: Whereas all but one lesion with one or two additional trisomies were goiters, those having three or more additional trisomies were all adenomas or adenomatous goiters.
Collapse
Affiliation(s)
- G Belge
- Zentrum für Humangenetik und Genetische Beratung, Universität Bremen
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Belge G, Roque L, Soares J, Bruckmann S, Thode B, Fonseca E, Clode A, Bartnitzke S, Castedo S, Bullerdiek J. Cytogenetic investigations of 340 thyroid hyperplasias and adenomas revealing correlations between cytogenetic findings and histology. Cancer Genet Cytogenet 1998; 101:42-8. [PMID: 9460499 DOI: 10.1016/s0165-4608(97)00057-5] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cytogenetic analyses were performed on 340 follicular thyroid adenomas and goiters after short-term culture. Clonal chromosomal changes were found in 67 cases. Trisomy 7 as the sole abnormality or along with other trisomies was the most frequent type of aberration (19 cases). Other recurrent numerical changes were loss of chromosome 22 (4 cases) and the second X or the Y chromosome (5 cases). Translocations involving 19q13 (12 cases) were frequent structural chromosomal changes. Dicentric chromosomes or telomeric associations were frequent in goiters (12 cases). After a histopathologic classification of all cases, we have correlated the cytogenetic findings with the histology of the tumors. Only 8.4% of the goiters showed clonal abnormalities, whereas 44.9% of the adenomas revealed clonal abnormalities. Furthermore, simple clonal changes were predominantly found in goiters and complex changes in adenomas. The most impressive correlation was found in the group of lesions with trisomy 7. Although all but one lesion with one or two additional trisomies were goiters, those having three or more additional trisomies were all adenomas or adenomatous goiters.
Collapse
Affiliation(s)
- G Belge
- Department of Pathology, University of Bremen, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Abstract
Warthin's tumour is a peculiar subtype of monomorphic adenomas of the salivary glands, frequently cystic, and that characteristically associates an epithelial glandular cell component to a dense lymphoid infiltrate. Short-term cultures from 12 Warthin's tumours of salivary glands, including 5 previously reported cases were successfully karyotyped and clonal numerical and/or structural changes were detected in 7 of them (58%). 3 cases showed numerical abnormalities with loss of chromosomes Y (2 cases) and X (1 case). The remaining 4 abnormal cases presented the following structural changes: complex translocation t(11;19;16)(q21;p12;p13.3); reciprocal translocations t(6;8)(p23;q22) and t(6;15)(p21;q15) (2 cases); and 1p22, 3p26, 11p13 changes. In 1 case, clonal numerical deviations (+ 7 and -Y) were concurrent with the structural rearrangement t(6;8). Two of these aberrations are suggested to be Warthin's tumour-associated: 11q;19p translocation has already been described in 3 cases, and structural rearrangements of 6p23 have also been reported in another case. Our study extends the cytogenetic information about Warthin's tumour and identifies two recurrent abnormalities --6p rearrangements and t(11;19)--specific for this salivary neoplasm.
Collapse
Affiliation(s)
- C Martins
- Departamento de Patologia Morfológica, Instituto Português de Oncologia de Francisco Gentil, Lisboa, Portugal
| | | | | | | |
Collapse
|
43
|
Roque L, Oliveira P, Martins C, Carvalho C, Serpa A, Soares J. A nonbalanced translocation (10;16) demonstrated by FISH analysis in a case of alveolar adenoma of the lung. Cancer Genet Cytogenet 1996; 89:34-7. [PMID: 8689607 DOI: 10.1016/0165-4608(95)00309-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Short-term cultures from an alveolar adenoma of the lung were cytogenetically examined. Of the 54 metaphases studied, 44 were characterized by an apparently normal karyotype and 10 showed a pseudodiploid karyotype: 46,XX,add(16)(q24). Fluorescence in situ hybridization studies permitted identification of the add(16)(q24) as a der(16)t(10;16)(q23;q24). This is the first report of a chromosomal aberration in an alveolar adenoma of the lung.
Collapse
Affiliation(s)
- L Roque
- CIPM-Portuguese Cancer Institute, Lisbon, Portugal
| | | | | | | | | | | |
Collapse
|
44
|
Abstract
A group of 19 malignant salivary gland neoplasms of various histological types (mucoepidermoid carcinoma, acinic cell carcinoma, adenoid cystic carcinoma, epithelial-myoepithelial carcinoma, myoepithelial carcinoma, basal cell adenocarcinoma, carcinoma ex-pleomorphic adenoma, ductal carcinoma, adenocarcinoma not otherwise specified and undifferentiated carcinoma) were cytogenetically investigated. Previous karyotypic information revealed deletion of the long arm of chromosome 6, loss of chromosome Y and the gain of chromosome 8 as the most recurrent deviations found in these neoplasms. Clonal chromosome aberrations were detected in 11 cases of this series. In 7 of them there were only numerical deviations (gain of chromosomes 2, 7, 8, 10 and X and loss of chromosomes 18, 21 and Y) without concomitant structural anomalies. Structural rearrangements such as t(2;7), t(6;16), t(6;9) and t(1;1) translocations were found in two mucoepidermoid carcinomas, one adenoid cystic carcinoma and one ductal carcinoma, respectively. The wide spectrum of changes found in this group of neoplasms may reflect the diversity in their histogenesis and differentiation phenotypes.
Collapse
Affiliation(s)
- C Martins
- Departamento de Patologia Morfológica, Instituto Português de Oncologia de Francisco Gentil, Lisboa, Portugal
| | | | | | | | | |
Collapse
|
45
|
Abstract
Cytogenic findings of 21 benign salivary gland tumors, including 14 pleomorphic adenomas, 5 Warthin's tumors, 1 myoepithelioma, and 1 cystadenoma, are reported. The present study confirms that pleomorphic adenomas characteristically have highly specific rearrangements involving only a few chromosome regions (3p21, 8q12 and 12q13-15) which suggests their specific role in the mixed tumor genesis. Warthin's tumors also show non-random numerical and structural alterations that were concurrent in one of the cases studied. To our knowledge no cytogenetic data are available in myoepitheliomas and cystadenomas. The former reveals a normal karyotype and the latter shows only clonal numerical alterations (gain of chromosomes 2 and 18).
Collapse
Affiliation(s)
- C Martins
- Departmento de Patologia Morfológica, Instituto Português de Oncologia de Francisco Gentil, Lisbon, Portugal
| | | | | | | | | |
Collapse
|
46
|
Abstract
Chromosome studies performed on 31 papillary thyroid carcinomas (PTCs) revealed clonal numerical and structural abnormalities in 12 tumors. The numerical clonal aberrations found were trisomy 2, trisomy 7, and loss of the Y chromosome. A nonrandom telomeric association, tas(15;16)(p13;p13), was observed in one carcinoma. Structural alterations with a breakpoint at 10q11.2 were detected in two tumors. Other chromosomes involved in rearrangements were chromosomes 1, 2, 3, 5, 7, 9, 11, 12, and 14. The observation of clonal changes of chromosome 2 [i(2)(q10) and trisomy 2] in two tumors, which were both histologically classified as tall-cell PTC variants, suggests that gain of 2q may be important in the development of this morphological variant.
Collapse
Affiliation(s)
- L Roque
- Department of Morphological Pathology Portuguese Institute for Oncology, Lisbon
| | | | | | | | | | | |
Collapse
|
47
|
Abstract
The effects of eggshell quality and breeder age were assessed on egg weight loss during incubation, fertility, hatchability, and embryonic mortality. The trials involved hatching eggs from three commercial broiler breeder flocks of the same strain but of different ages. The eggs were divided according to specific gravity into two groups, thin-shelled (< or = 1.080) and thick-shelled (> 1.080). Thin-shelled eggs displayed a greater increase in weight with breeder age and greater weight loss during incubation. Thick-shelled eggs showed an increased hatchability as a result of greater fertility and lower intermediate and late embryonic mortalities. Percentage of culls, pips, and rots were not related to shell thickness. Eggs from the younger flock had a higher weight loss during incubation irrespective of shell thickness. Hatchability and viability (hatchability of fertile eggs) were lower in the younger flock due to increased early and late embryonic mortalities. Fertility, culls, and pips were not affected by breeder age. The data may indicate the extent to which recent innovations in breeder management and in incubation technology have changed patterns of fertility and embryonic mortality.
Collapse
Affiliation(s)
- L Roque
- Instituto Superior de Agronomia, Lisboa, Portugal
| | | |
Collapse
|
48
|
Suijkerbuijk RF, Sinke RJ, Weghuis DE, Roque L, Forus A, Stellink F, Siepman A, van de Kaa C, Soares J, Geurts van Kessel A. Amplification of chromosome subregion 12p11.2-p12.1 in a metastasis of an i(12p)-negative seminoma: relationship to tumor progression? Cancer Genet Cytogenet 1994; 78:145-52. [PMID: 7828145 DOI: 10.1016/0165-4608(94)90082-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Cytogenetic analysis of a metastasis of a human testicular germ cell tumor (seminoma) revealed multiple numerical and structural anomalies, including an abnormally banding region (ABR) present on the short arm of one of the chromosome 12 homologs. Fluorescence in situ- and comparative genomic hybridization experiments revealed that the ABR results from the amplification of 12p11.2-p12.1 derived sequences. We speculate that this particular region may harbor gene(s) relevant for testicular germ cell tumor progression.
Collapse
Affiliation(s)
- R F Suijkerbuijk
- Department of Human Genetics, University Hospital Nijmegen, The Netherlands
| | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Bugalho MJ, Roque L, Sobrinho LG, Hoog A, Nunes JF, Almeida JM, Leitão CN, Santos JR, Pereira MC, Santos MA. Calcitonin-producing insulinoma: clinical, immunocytochemical and cytogenetical study. Clin Endocrinol (Oxf) 1994; 41:257-60. [PMID: 7923832 DOI: 10.1111/j.1365-2265.1994.tb02539.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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The case of a patient with a large goitre associated with hypercalcitoninaemia and fasting hypoglycaemia is reported. Pentagastrin (PG) test was negative. Repeated measurements of fasting glycaemia, insulin and C peptide established the diagnosis of insulinoma. After localization by endoscopic ultrasonography, a distal pancreatectomy was performed and a small insulinoma was recovered. Glycaemia and calcitonin (CT) became normal. The tumour cells displayed a strong immunoreactivity for insulin and CT. Cytogenetical evaluation of the tumour revealed a translocation t(1;9) (p13;p22).
Collapse
Affiliation(s)
- M J Bugalho
- Department of Endocrinology, Portuguese Cancer Institute, Lisbon, Portugal
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Abstract
We report the cytogenetic analysis of a follicular thyroid carcinoma and its bone metastasis. Both lesions had identical chromosomal abnormalities, with a der(3)t(2;3)(q13;p25) as the most likely primary clonal alteration. Our findings corroborate previous observations of frequent 3p deletions in thyroid follicular carcinomas and suggest that the minimal chromosomal region of loss in these tumors is 3p25-->pter.
Collapse
Affiliation(s)
- L Roque
- Institute for Molecular Pathology and Immunology, University of Porto-IPATIMUP, Portugal
| | | | | | | |
Collapse
|