1
|
Martins-da-Silva A, Baroni M, Salomão KB, das Chagas PF, Bonfim-Silva R, Geron L, Cruzeiro GAV, da Silva WA, Corrêa CAP, Carlotti CG, de Paula Queiroz RG, Marie SKN, Brandalise SR, Yunes JA, Scrideli CA, Valera ET, Tone LG. Clinical Prognostic Implications of Wnt Hub Genes Expression in Medulloblastoma. Cell Mol Neurobiol 2023; 43:813-826. [PMID: 35366170 DOI: 10.1007/s10571-022-01217-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 03/22/2022] [Indexed: 11/03/2022]
Abstract
Medulloblastoma is the most common type of pediatric malignant primary brain tumor, and about one-third of patients die due to disease recurrence and most survivors suffer from long-term side effects. MB is clinically, genetically, and epigenetically heterogeneous and subdivided into at least four molecular subgroups: WNT, SHH, Group 3, and Group 4. We evaluated common differentially expressed genes between a Brazilian RNA-seq GSE181293 dataset and microarray GSE85217 dataset cohort of pediatric MB samples using bioinformatics methodology in order to identify hub genes of the molecular subgroups based on PPI network construction, survival and functional analysis. The main finding was the identification of five hub genes from the WNT subgroup that are tumor suppressors, and whose lower expression is related to a worse prognosis for MB patients. Furthermore, the common genes correlated with the five tumor suppressors participate in important pathways and processes for tumor initiation and progression, as well as development and differentiation, and some of them control cell stemness and pluripotency. These genes have not yet been studied within the context of MB, representing new important elements for investigation in the search for therapeutic targets, prognostic markers or for understanding of MB biology.
Collapse
Affiliation(s)
- Andrea Martins-da-Silva
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil.
| | - Mirella Baroni
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Karina Bezerra Salomão
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Pablo Ferreira das Chagas
- Department of Genetics, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Ricardo Bonfim-Silva
- Department of Surgery and Anatomy, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Lenisa Geron
- Department of Genetics, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Gustavo Alencastro Veiga Cruzeiro
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil.,Department of Pediatric Oncology, Harvard Medical School - Dana-Farber Cancer Institute, Boston, MA, USA
| | - Wilson Araújo da Silva
- Department of Genetics, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Carolina Alves Pereira Corrêa
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Carlos Gilberto Carlotti
- Department of Surgery and Anatomy, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Rosane Gomes de Paula Queiroz
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | | | | | | | - Carlos Alberto Scrideli
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil.,Department of Genetics, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Elvis Terci Valera
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| | - Luiz Gonzaga Tone
- Department of Pediatrics, University Hospital - Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil.,Department of Genetics, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, Brazil
| |
Collapse
|
2
|
Marinho AMDN, Lobão-Soares B, Targino HAS, Vasconcellos YJF, Guarnieri R, Carlotti CG. Decreased hippocampal serotonin 5HT 1A expression in mesial temporal lobe of epilepsy patients. Epilepsy Behav 2022; 129:108574. [PMID: 35189481 DOI: 10.1016/j.yebeh.2022.108574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Mesial temporal lobe epilepsy related to hippocampal sclerosis (MTLE-HS) is a surgically remediable epilepsy with a relatively high prevalence and psychiatric comorbidities. Depressive disorders may occur in up to 25% of MTLE-HS patients suggesting a common molecular mechanism underlying both conditions. OBJECTIVE To compare the gene expression comprising serotonin 5HT1A and 5HT2A, noradrenaline (NA) ADRA1A, and ADRA2A receptors in the hippocampus of MTLE-HS patients with and without major depression. METHODS A cross-sectional study allocated 31 patients in three groups: MTLE-HS without psychiatric diagnosis (MTLE-HS group), MTLE-HS with major depression (MTLE-HS-D group) and a control group consisting of healthy volunteers without any neurological or psychiatric disorders. Demographic and clinical characteristics were compared among groups. Gene expression of receptors were analyzed using general linear mixed models (GLMM), with an unstructured matrix, normal link. RESULTS The three groups showed a similar distribution regarding age, gender (p > 0.16), history of initial precipitating injury, family history of epilepsy, monthly frequency of seizures, side of hippocampal sclerosis, interictal spike distribution and anti-seizure medications did not differ between MTLE-HS and MTLE-HS-D groups (p > 0.05). We observed a greater expression of the 5HT1A receptor in the control group when compared to the MTLE-HS (P = .004) and MTLE-HS-D (P = .007). Nevertheless, we did not observe any difference when MTLE-HS and MTLE-HS-D groups were compared to the controls for the ADRA1A (P = .931; P = .931), ADRA2A (P = .120; P = .121) and 5HT2A (P = .638; P = .318, respectively) gene expression. CONCLUSION Mesial temporal lobe epilepsy related to hippocampal sclerosis and MTLE-HS-D patients showed a lowered expression of the 5HT1A receptors when compared with the controls adjusted for age and schooling. Data suggest that temporal lobe epilepsy plasticity may affect serotonin receptors, which may lead to more frequent cases of major depression in this population. More studies comprising wider samples are necessary to confirm these results; they also should investigate serotonin reuptake drugs as an adjuvant therapeutic option for MTLE-HS disorder.
Collapse
Affiliation(s)
| | - Bruno Lobão-Soares
- Department of Biophysics and Pharmacology, Federal University of Rio Grande do Norte (DBF - UFRN), Brazil.
| | | | | | | | - Carlos Gilberto Carlotti
- Department of Surgery, Faculty of Medicine of Ribeirão Preto, Universidade de São Paulo, (FMRP-USP), Brazil
| |
Collapse
|
3
|
Abstract
Background Cancer is a group of heterogeneous diseases characterized by several disruptions of the genetic and epigenetic components of cell biology. Some types of cancer have been shown to be constituted by a mosaic of cells with variable differentiation states, with more aggressive tumors being more undifferentiated. In most cases, undifferentiated tumor cells express associated embryonic markers such as the OCT4, NANOG, SOX2, and CARM1 genes. The ectopic or reminiscent expression of some master regulator genes of pluripotency has been indicated as the cause of the poorly differentiated state of tumors, and based on the evidence of some reports, can be used as a possible therapeutic target. Considering this information, a more detailed investigation of the expression of pluripotency-associated genes is necessary to evaluate the roles of these genes in the etiology of some tumors and their use targets of therapy. Methods The expression of four pluripotency-related genes was investigated (OCT4, NANOG, SOX2, and CARM1) in the most malignant primary human brain tumor, glioblastoma (GBM). Results and Conclusion The results demonstrated a signature of OCT4/SOX2/CARM1 genes and a significant increase of CARM1 expression in GBM cases.
Collapse
Affiliation(s)
- Álvaro Fabrício Lopes Rios
- Laboratory of Biotechnology, Center for Biosciences and Biotechnology, North Fluminense State University, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | | | - Mucio Luiz de Assis Cirino
- Department of Surgery and Anatomy, Ribeirão Preto Faculty of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Andressa Romualdo Rodrigues
- Laboratory of Morphofunctional and Integrated Practices, Franca Medical School, University of Franca, Franca, São Paulo, Brazil
| | - Ester S Ramos
- Department of Genetics, Ribeirão Preto Faculty of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Carlos Gilberto Carlotti
- Department of Surgery and Anatomy, Ribeirão Preto Faculty of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| |
Collapse
|
4
|
Carneiro V, Cirino M, Panepucci R, Peria F, Tirapelli D, Colli B, Carlotti CG. The Role of MicroRNA 181d as a Possible Biomarker Associated With Tumor Progression in Meningiomas. Cureus 2021; 13:e19158. [PMID: 34873501 PMCID: PMC8631491 DOI: 10.7759/cureus.19158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/30/2021] [Indexed: 11/10/2022] Open
Abstract
Introduction Meningiomas are slow-growing intracranial neoplasms that originate from arachnoid meningothelial cells and represent 13-26% of intracranial tumors, thus being the most common. There are numerous technological advances available for a better understanding of the molecular pathways correlated with tumorigenesis and tumor progression of meningiomas. In this context, the role of microRNAs (miRNAs), which are non-coding RNAs (ncRNAs) consisting of 18 to 25 nucleotides whose function is the silencing of mRNA at the posttranscriptional level, has been highlighted. Recent studies suggest that miRNAs may act as possible biomarkers as well as therapeutic targets for various diseases, including brain tumors. Therefore, the objective of our study was to evaluate the tissue and plasma expression of the miRNAs miR-181d, miR-181c, and miR-130a. Methods The miRNAs miR-181d, miR-181c, and miR-130a were selected from our group’s prior study by the large-scale microarray analysis technique. In this work, the expression of these miRNAs in the tumor tissue and plasma of patients with grade I (16 patients), II (16 patients), and III (eight patients) meningiomas was evaluated. Results MiR-181d was overexpressed in both tumor tissue and plasma in the studied groups. The level of expression was higher according to the progression of tumor grade. MiR-181c and miR-130a showed no significant difference in the studied groups in either tumor tissue or plasma. Conclusions MiR-181d has potential as a biomarker for meningiomas and is associated with the tumor progression of meningiomas.
Collapse
Affiliation(s)
- Vinícius Carneiro
- Surgery and Anatomy, University of São Paulo, Ribeirão Preto Medical School, Ribeirão Preto, BRA
| | - Múcio Cirino
- Surgery and Anatomy, University of São Paulo, Ribeirão Preto Medical School, Ribeirão Preto, BRA
| | - Rodrigo Panepucci
- Hemocenter, Laboratory of Functional Biology (LFBio) Center for Cell-Based (CTC, Regional Blood Center of Ribeirão Preto, Ribeirão Preto, BRA
| | - Fernanda Peria
- Surgery and Anatomy, University of São Paulo, Ribeirão Preto Medical School, Ribeirão Preto, BRA
| | - Daniela Tirapelli
- Surgery and Anatomy, University of São Paulo, Ribeirão Preto Medical School, Ribeirão Preto, BRA
| | - Benedicto Colli
- Neurosurgery, University of São Paulo, Ribeirão Preto Medical School, Ribeirão Preto, BRA
| | - Carlos Gilberto Carlotti
- Surgery and Anatomy, University of São Paulo, Ribeirão Preto Medical School, Ribeirão Preto, BRA
| |
Collapse
|
5
|
Colli BO, Machado HR, Carlotti CG, Assirati JA, Oliveira RSD, Gondim GGP, Santos ACD, Neder L. Epidemiological features of meningiomas: a single Brazilian center's experience with 993 cases. Arq Neuropsiquiatr 2021; 79:705-715. [PMID: 34550193 DOI: 10.1590/0004-282x-anp-2020-0441] [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] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 11/04/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Meningiomas are the most frequent primary central nervous system (CNS) tumors. Their geographical and ethnic characteristics need to be known, in order to enable rational treatment. OBJECTIVE To investigate clinical and epidemiological aspects in a series of patients with meningiomas. METHODS Retrospective analysis on the demographic profile, location and histopathology of 993 patients with meningiomas (768 operated and 225 not operated). RESULTS Meningiomas represented 43.8% of the primary CNS tumors; 6.8% were multiple tumors (14.7% with neurofibromatosis 2) and 0.6% were radiation-induced tumors. The mean ages were 53.0 and 63.9 years for operated and non-operated patients and the female/male ratios were 3.2:1 and 6.3:1. Diagnosis was made later among females. The peak incidences were in the 6th and 7th decades respectively for operated and non-operated patients. The incidence was low at early ages and higher among patients aged 70+ years. The meningiomas were intracranial in 96.5% and most were WHO grade I (88.9%) and transitional. In the spinal canal (3.5%), they occurred mainly in the dorsal region (all grade I; mostly transitional). The racial distribution was 1.0% in Asian-Brazilians, 87% in Caucasians and 12% in African-Brazilians. 83.4% and 51.6% of the patients were estimated to be recurrence-free at 10 and 20 years, and the mortality rate was 3%. CONCLUSIONS Most of the demographic data were similar to what has been observed in other western centers. Differences were higher incidence of meningiomas, female and older predominance in non-operated patients, predominance in Caucasian, and higher association with neurofibromatosis 2.
Collapse
Affiliation(s)
- Benedicto Oscar Colli
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia, Divisão de Neurocirurgia, Ribeirão Preto SP, Brazil
| | - Hélio Rubens Machado
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia, Divisão de Neurocirurgia, Ribeirão Preto SP, Brazil
| | - Carlos Gilberto Carlotti
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia, Divisão de Neurocirurgia, Ribeirão Preto SP, Brazil
| | - João Alberto Assirati
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia, Divisão de Neurocirurgia, Ribeirão Preto SP, Brazil
| | - Ricardo Santos De Oliveira
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia, Divisão de Neurocirurgia, Ribeirão Preto SP, Brazil
| | - Guilherme Gozzoli Podolsky Gondim
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia, Divisão de Neurocirurgia, Ribeirão Preto SP, Brazil
| | - Antonio Carlos Dos Santos
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Imagem Médica, Hematologia e Oncologia Clínica, Ribeirão Preto SP, Brazil
| | - Luciano Neder
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Patologia, Ribeirão Preto SP, Brazil
| |
Collapse
|
6
|
Peixoto-Santos JE, Velasco TR, Carlotti CG, Assirati JA, Rezende GHDSE, Kobow K, Coras R, Blümcke I, Salmon CEG, Santos ACD, Leite JP. Histological correlates of hippocampal magnetization transfer images in drug-resistant temporal lobe epilepsy patients. Neuroimage Clin 2020; 28:102463. [PMID: 33395959 PMCID: PMC7586233 DOI: 10.1016/j.nicl.2020.102463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/01/2020] [Accepted: 10/05/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Temporal lobe epilepsy patients (TLE) often present with hippocampal atrophy, increased T2 relaxation, and reduced magnetization transfer ratio (MTR) in magnetic resonance images (MRI). The histological correlates of the reduced hippocampal MTR are so far unknown. Since MTR is dependent on the tissue's macromolecules, our aim was to evaluate the correlations between cellular populations, extracellular matrix molecules and the MTR in TLE patients. METHODS Patients with TLE (n = 26) and voluntaries (=20) were scanned in a 3 Tesla MRI scanner, and MTR images were calculated from 3DT1 sequences with magnetization pulse on resonance. Immunohistochemistry for neurons, reactive astrocytes, activated microglia, and extracellular matrix chondroitin sulfate were performed in formalin fixed, paraffin embedded tissues of TLE and autopsy controls (n = 10). Results were considered significant with adjusted p < 0.05. RESULTS Compared to the respective controls, TLE patients had reduced hippocampal MTR, increased reactive astrocytes and activated microglia, increased extracellular chondroitin sulfate, and reduced neuron density, compares to controls. MTR correlated positively with neuron density in CA3 and with chondroitin sulfate in CA3 and CA1. Multiple linear regressions reinforced the correlations between chondroitin sulfate and MTR. SIGNIFICANCE Our data indicate that extracellular matrix molecules are the most significant histological correlates of magnetization transfer ratio in the hippocampus of TLE patients.
Collapse
Affiliation(s)
- Jose Eduardo Peixoto-Santos
- Department of Neurology and Neurosurgery, Paulista Medical School, UNIFESP, Sao Paulo, Brazil; Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil.
| | - Tonicarlo R Velasco
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil.
| | - Carlos Gilberto Carlotti
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil.
| | - Joao Alberto Assirati
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil.
| | - Gustavo Henrique de Souza E Rezende
- Center for Technology and Research in Magneto-Resonance (CTPMAG), Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Katja Kobow
- Department of Neuropathology, University Hospital Erlangen, Erlangen, Germany.
| | - Roland Coras
- Department of Neuropathology, University Hospital Erlangen, Erlangen, Germany.
| | - Ingmar Blümcke
- Department of Neuropathology, University Hospital Erlangen, Erlangen, Germany.
| | - Carlos Ernesto Garrido Salmon
- Department of Physics and Mathematics, Faculty of Philosophy, Science and Languages of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil.
| | - Antonio Carlos Dos Santos
- Department of Internal Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil.
| | - Joao Pereira Leite
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil.
| |
Collapse
|
7
|
Dombroski TCD, Peixoto-Santos JE, Maciel K, Baqui MMA, Velasco TR, Sakamoto AC, Assirati JA, Carlotti CG, Machado HR, Sousa GKD, Hanamura K, Leite JP, Costa da Costa J, Palmini AL, Paglioli E, Neder L, Spreafico R, Shirao T, Garbelli R, Martins AR. Drebrin expression patterns in patients with refractory temporal lobe epilepsy and hippocampal sclerosis. Epilepsia 2020; 61:1581-1594. [PMID: 32662890 DOI: 10.1111/epi.16595] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 03/19/2020] [Revised: 06/08/2020] [Accepted: 06/08/2020] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Drebrins are crucial for synaptic function and dendritic spine development, remodeling, and maintenance. In temporal lobe epilepsy (TLE) patients, a significant hippocampal synaptic reorganization occurs, and synaptic reorganization has been associated with hippocampal hyperexcitability. This study aimed to evaluate, in TLE patients, the hippocampal expression of drebrin using immunohistochemistry with DAS2 or M2F6 antibodies that recognize adult (drebrin A) or adult and embryonic (pan-drebrin) isoforms, respectively. METHODS Hippocampal sections from drug-resistant TLE patients with hippocampal sclerosis (HS; TLE, n = 33), of whom 31 presented with type 1 HS and two with type 2 HS, and autopsy control cases (n = 20) were assayed by immunohistochemistry and evaluated for neuron density, and drebrin A and pan-drebrin expression. Double-labeling immunofluorescences were performed to localize drebrin A-positive spines in dendrites (MAP2), and to evaluate whether drebrin colocalizes with inhibitory (GAD65) and excitatory (VGlut1) presynaptic markers. RESULTS Compared to controls, TLE patients had increased pan-drebrin in all hippocampal subfields and increased drebrin A-immunopositive area in all hippocampal subfields but CA1. Drebrin-positive spine density followed the same pattern as total drebrin quantification. Confocal microscopy indicated juxtaposition of drebrin-positive spines with VGlut1-positive puncta, but not with GAD65-positive puncta. Drebrin expression in the dentate gyrus of TLE cases was associated negatively with seizure frequency and positively with verbal memory. TLE patients with lower drebrin-immunopositive area in inner molecular layer (IML) than in outer molecular layer (OML) had a lower seizure frequency than those with higher or comparable drebrin-immunopositive area in IML compared with OML. SIGNIFICANCE Our results suggest that changes in drebrin-positive spines and drebrin expression in the dentate gyrus of TLE patients are associated with lower seizure frequency, more preserved verbal memory, and a better postsurgical outcome.
Collapse
Affiliation(s)
| | - Jose Eduardo Peixoto-Santos
- Discipline of Neuroscience, Department of Neurology and Neurosurgery, Paulista Medical School, UNIFESP, São Paulo, Brazil
| | - Karina Maciel
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Munira Muhammad Abdel Baqui
- Department of Cellular and Molecular Biology and Pathogenic Bioagents, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Tonicarlo Rodrigues Velasco
- Ribeirao Preto Epilepsy Surgery Center, Clinics Hospital, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Americo Ceiki Sakamoto
- Ribeirao Preto Epilepsy Surgery Center, Clinics Hospital, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - João Alberto Assirati
- Department of Surgery, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Carlos Gilberto Carlotti
- Department of Surgery, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Hélio Rubens Machado
- Department of Surgery, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Gleice Kelly de Sousa
- Graduate Program of Health Sciences, Federal University of Triângulo Mineiro, Uberaba, Brazil
| | - Kenji Hanamura
- Department of Neurobiology and Behavior, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - João Pereira Leite
- Department of Neurosciences and Behavioral Sciences, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Jaderson Costa da Costa
- Department of Internal Medicine, School of Medicine, Epilepsy Surgery Program and Brain Institute, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - André Luiz Palmini
- Department of Internal Medicine, School of Medicine, Epilepsy Surgery Program and Brain Institute, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Eliseu Paglioli
- Department of Surgery, School of Medicine, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Luciano Neder
- Department of Pathology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Roberto Spreafico
- Clinical Epileptology and Experimental Neurophysiology Unit, Scientific Institute for Research and Health Care Foundation Carlo Besta Neurological Institute, Milan, Italy
| | - Tomoaki Shirao
- Department of Neurobiology and Behavior, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Rita Garbelli
- Clinical Epileptology and Experimental Neurophysiology Unit, Scientific Institute for Research and Health Care Foundation Carlo Besta Neurological Institute, Milan, Italy
| | - Antonio Roberto Martins
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Institute for Neuroscience and Behavior, Ribeirão Preto, Brazil
| |
Collapse
|
8
|
Hamamoto O, Tirapelli DPDC, Lizarte Neto FS, Freitas-Lima P, Saggioro FP, Cirino MLDA, Assirati JA, Serafini LN, Velasco TR, Sakamoto AC, Carlotti CG. Modulation of NMDA receptor by miR-219 in the amygdala and hippocampus of patients with mesial temporal lobe epilepsy. J Clin Neurosci 2020; 74:180-186. [PMID: 32111564 DOI: 10.1016/j.jocn.2020.02.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/10/2020] [Indexed: 01/28/2023]
Abstract
Mesial temporal lobe epilepsy with hippocampal sclerosis is the most frequent form of focal epilepsy in adults, and it is often refractory to drug treatment. Regardless of the efforts on developing new antiepileptic drugs for refractory cases, studies suggest a need for better understanding the molecular bases of epilepsy. The microRNAs have been progressively investigated as potential targets for both epilepsy mechanisms elucidation and treatment. Therefore, the goal of this study was to evaluate the differential expression of miR-219, miR-181b, and miR-195, previously described as regulators of the excitatory neurotransmitter receptors NMDA-R1 and AMPA-GluR2 and inhibitory neurotransmitter GABAA (α2, β3, and γ2 subunits) in the amygdala and hippocampus of patients with mesial temporal lobe epilepsy. Based on genes and miRNAs' quantitative Polymerase Chain Reaction (qPCR) from 18 patients with epilepsy, our results showed an inverse relationship between miR-219 and NMDA-NR1 expression in both the amygdala and hippocampus in comparison to their expression in controls. NR1 and GluR2 were upregulated in the amygdala of epileptic patients. Low miR-195 expression was observed in the amygdala of patients with epilepsy. Our findings indicate that miR-219 has a possible regulatory role in excitatory neurotransmission in patients with epilepsy, contributing to the new avenue of miRNA biology in drug-resistant epilepsy, reserving huge potential for future applications and clinical interventions in conjunction with existing therapies.
Collapse
Affiliation(s)
- Osmi Hamamoto
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | | | - Fermino Sanches Lizarte Neto
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Priscila Freitas-Lima
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil; Barao de Maua University Center, Ribeirao Preto, SP, Brazil
| | - Fabiano Pinto Saggioro
- Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Mucio Luiz de Assis Cirino
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - João Alberto Assirati
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Luciano Neder Serafini
- Department of Pathology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Tonicarlo Rodrigues Velasco
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Américo Ceiki Sakamoto
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Carlos Gilberto Carlotti
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| |
Collapse
|
9
|
Silva JPD, Lizarte Neto FS, Cirino MLDA, Carvalho CAMD, Carlotti CG, Colli BO, Tirapelli DPDC, Tirapelli LF. Analysis of Caspase-9 protein and microRNAs miR-21, miR-126 and miR-155 related to the apoptosis mechanism in the cerebellum of rats submitted to focal cerebral ischemia associated with an alcoholism model. Arq Neuropsiquiatr 2019; 77:689-695. [PMID: 31664344 DOI: 10.1590/0004-282x20190126] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/07/2019] [Indexed: 01/30/2023]
Abstract
OBJECTIVE This study aimed to analyze the cerebellum of rats submitted to an experimental focal cerebral ischemia, by middle cerebral artery occlusion for 90 minutes, followed by reperfusion for 48 hours, associated with an alcoholism model. METHODS Fifty adult Wistar rats were used, subdivided into five experimental groups: control group (C): animals submitted to anesthesia only; sham group (S): animals submitted to complete simulation of the surgical procedure; ischemic group (I): animals submitted to focal cerebral ischemia for 90 minutes followed by reperfusion for 48 hours; alcoholic group (A): animals that received daily absolute ethanol diluted 20% in water for four weeks; and, ischemic and alcoholic group (I + A): animals receiving the same treatment as group A and, after four weeks, submitted to focal cerebral ischemia for 90 minutes, followed by reperfusion for 48 hours. The cerebellum samples were collected and immunohistochemical analysis of Caspase-9 protein and serum analysis by RT-PCR of microRNAs miR-21, miR-126 and miR155 were performed. RESULTS The expression of Caspase-9 was higher in groups I, A and I + A. In the microRNAs analyses, miR-126 was higher in groups A and I + A, miR-155 was higher in groups I and I + A. CONCLUSIONS We conclude that apoptosis occurs in the cerebellar cortex, even if it is distant from the ischemic focus, and that microRNAs 126 and 155 show a correlation with cellular apoptosis in ischemic rats and those submitted to the chronic alcohol model.
Collapse
Affiliation(s)
- Jairo Pinheiro da Silva
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia e Anatomia, Ribeirão Preto SP, Brasil
| | - Fermino Sanches Lizarte Neto
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia e Anatomia, Ribeirão Preto SP, Brasil
| | - Mucio Luiz de Assis Cirino
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia e Anatomia, Ribeirão Preto SP, Brasil
| | | | - Carlos Gilberto Carlotti
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia e Anatomia, Ribeirão Preto SP, Brasil
| | - Benedicto Oscar Colli
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia e Anatomia, Ribeirão Preto SP, Brasil
| | | | - Luís Fernando Tirapelli
- Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Cirurgia e Anatomia, Ribeirão Preto SP, Brasil
| |
Collapse
|
10
|
Cruzeiro GAV, Dos Reis MB, Silveira VS, Lira RCP, Carlotti CG, Neder L, Oliveira RS, Yunes JA, Brandalise SR, Aguiar S, Eterovic AK, Tone LG, Scrideli CA, Valera ET. HIF1A is Overexpressed in Medulloblastoma and its Inhibition Reduces Proliferation and Increases EPAS1 and ATG16L1 Methylation. Curr Cancer Drug Targets 2019; 18:287-294. [PMID: 28302031 DOI: 10.2174/1568009617666170315162525] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 01/04/2017] [Accepted: 01/09/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Genetic and epigenetic modifications are closely related to tumor initiation and progression and can provide guidance for understanding tumor functioning, potentially leading to the discovery of new therapies. Studies have associated hypoxia-related genes to tumor progression and chemo/radioresistance in brain tumors. Information on the expression profile of hypoxiarelated genes in pediatric medulloblastoma, although scarce, may reveal relevant information that could support treatment decisions. OBJECTIVE Our study focused on evaluation the of CA9, CA12, HIF1A, EPAS1, SCL2A1 and VEGF genes in 41 pediatric fresh-frozen medulloblastoma sample. Additionally, we analyzed the effect of hypoxia and normoxia in the pediatric medulloblastoma cell-line UW402. Furthermore, we assessed the effects of HIF1A knockdown in cell-proliferation and methylation levels of genes related to hypoxia, apoptosis and autophagy. METHOD qPCR was performed to evaluate mRNA levels, and Western blot to confirm HIF1A silencing in both patient samples and cell line. Pyrosequencing was performed to asses the methylation levels after HIF1A knockdown in the UW402 cell line. RESULTS A higher HIF1A mRNA level was observed in MB patients when compared to the cerebellum (non-tumor match). In UW402 MB cell-line, chemically induced hypoxic resulted in an increase of mRNA levels of HIF1A, VEGF, SCL2A1 and CA9 genes. Additionally, HIF1A knockdown induced a decrease in the expression of hypoxia related genes and a decrease of 30% in cell proliferation was also observed. Also, a significant increase in the methylation of ATG16L1 promoter and decrease in the methylation of EPAS1 promoter were observed after HIF1A knockdown. CONCLUSION HIF1A knockdown in medulloblastoma cells lead to decreased cellular proliferation, suggesting that HIF1A can be a potential therapeutic target to be explored in the medulloblastoma. However, the mechanisms behind HIF1A protein stabilization and function are very complex and more data need to be generated to potentially use HIF1A as a therapeutical target.
Collapse
Affiliation(s)
- Gustavo Alencastro Veiga Cruzeiro
- Department of Genetics, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Maristella Bergamo Dos Reis
- Department of Pediatrics, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Vanessa Silva Silveira
- Department of Genetics, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Regia Caroline Peixoto Lira
- Department of Pediatrics, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Carlos Gilberto Carlotti
- Department of Surgery, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Luciano Neder
- Department of Surgery, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Ricardo Santos Oliveira
- Department of Surgery, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Jose Andres Yunes
- Department of Pathology, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil.,State University of Campinas, Cidade Universitária Zeferino Vaz - Barão Geraldo, 13083-970, Campinas, SP, Brazil
| | - Silvia Regina Brandalise
- Department of Pathology, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil.,State University of Campinas, Cidade Universitária Zeferino Vaz - Barão Geraldo, 13083-970, Campinas, SP, Brazil
| | - Simone Aguiar
- Department of Pathology, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Agda Karina Eterovic
- Institute of Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Luiz Gonzaga Tone
- Department of Genetics, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Carlos Alberto Scrideli
- Department of Pediatrics, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| | - Elvis Terci Valera
- Department of Pediatrics, Ribeirao Preto Medicine School, University of Sao Paulo, Avenida dos Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil
| |
Collapse
|
11
|
Peixoto-Santos JE, de Carvalho LED, Kandratavicius L, Diniz PRB, Scandiuzzi RC, Coras R, Blümcke I, Assirati JA, Carlotti CG, Matias CCMS, Salmon CEG, Dos Santos AC, Velasco TR, Moraes MFD, Leite JP. Manual Hippocampal Subfield Segmentation Using High-Field MRI: Impact of Different Subfields in Hippocampal Volume Loss of Temporal Lobe Epilepsy Patients. Front Neurol 2018; 9:927. [PMID: 30524352 PMCID: PMC6256705 DOI: 10.3389/fneur.2018.00927] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 07/13/2018] [Accepted: 10/12/2018] [Indexed: 11/17/2022] Open
Abstract
In patients with temporal lobe epilepsy (TLE), presurgical magnetic resonance imaging (MRI) often reveals hippocampal atrophy, while neuropathological assessment indicates the different types of hippocampal sclerosis (HS). Different HS types are not discriminated in MRI so far. We aimed to define the volume of each hippocampal subfield on MRI manually and to compare automatic and manual segmentations for the discrimination of HS types. The T2-weighted images from 14 formalin-fixed age-matched control hippocampi were obtained with 4.7T MRI to evaluate the volume of each subfield at the anatomical level of the hippocampal head, body, and tail. Formalin-fixed coronal sections at the level of the body of 14 control cases, as well as tissue samples from 24 TLE patients, were imaged with a similar high-resolution sequence at 3T. Presurgical three-dimensional (3D) T1-weighted images from TLE went through a FreeSurfer 6.0 hippocampal subfield automatic assessment. The manual delineation with the 4.7T MRI was identified using Luxol Fast Blue stained 10-μm-thin microscopy slides, collected at every millimeter. An additional section at the level of the body from controls and TLE cases was submitted to NeuN immunohistochemistry for neuronal density estimation. All TLE cases were classified according to the International League Against Epilepsy's (ILAE's) HS classification. Manual volumetry in controls revealed that the dentate gyrus (DG)+CA4 region, CA1, and subiculum accounted for almost 90% of the hippocampal volume. The manual 3T volumetry showed that all TLE patients with type 1 HS (TLE-HS1) had lower volumes for DG+CA4, CA2, and CA1, whereas those TLE patients with HS type 2 (TLE-HS2) had lower volumes only in CA1 (p ≤ 0.038). Neuronal cell densities always decreased in CA4, CA3, CA2, and CA1 of TLE-HS1 but only in CA1 of TLE-HS2 (p ≤ 0.003). In addition, TLE-HS2 had a higher volume (p = 0.016) and higher neuronal density (p < 0.001) than the TLE-HS1 in DG + CA4. Automatic segmentation failed to match the manual or histological findings and was unable to differentiate TLE-HS1 from TLE-HS2. Total hippocampal volume correlated with DG+CA4 and CA1 volumes and neuronal density. For the first time, we also identified subfield-specific pathology patterns in the manual evaluation of volumetric MRI scans, showing the importance of manual segmentation to assess subfield-specific pathology patterns.
Collapse
Affiliation(s)
- Jose Eduardo Peixoto-Santos
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil.,Neuropathology Institute, University Hospitals Erlangen and Friedrich-Alexander University of Erlangen-Nuremberg, Erlangen, Germany
| | | | - Ludmyla Kandratavicius
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | | | - Renata Caldo Scandiuzzi
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Roland Coras
- Neuropathology Institute, University Hospitals Erlangen and Friedrich-Alexander University of Erlangen-Nuremberg, Erlangen, Germany
| | - Ingmar Blümcke
- Neuropathology Institute, University Hospitals Erlangen and Friedrich-Alexander University of Erlangen-Nuremberg, Erlangen, Germany
| | - Joao Alberto Assirati
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Carlos Gilberto Carlotti
- Department of Surgery and Anatomy, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | | | - Carlos Ernesto Garrido Salmon
- Department of Physics and Mathematics, Faculty of Philosophy, Science and Languages of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Antonio Carlos Dos Santos
- Department of Internal Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Tonicarlo R Velasco
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Marcio Flavio D Moraes
- Department of Physiology and Biophysics, Center for Technology and Research in Magneto-Resonance, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Joao Pereira Leite
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| |
Collapse
|
12
|
Schiavoni VS, Silva JPD, Lizarte Neto FS, Assis MLCD, Tazima MDFGS, Carvalho CAMD, Tirapelli DPDC, Carlotti CG, Colli BO, Tirapelli LF. Morphological and immunohistochemical analysis of proteins CASPASE 3 and XIAP in rats subjected to cerebral ischemia and chronic alcoholism. Acta Cir Bras 2018; 33:652-663. [PMID: 30208127 DOI: 10.1590/s0102-865020180080000001] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 07/14/2018] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To evaluate histopathological and ultrastructural changes and expression of proteins related to apoptosis CASPASE 3 and XIAP after experimental induction of temporary focal cerebral ischemia (90 minutes) due to obstruction of the middle cerebral artery in alcoholism model. METHODS Forty adult Wistar rats were used, subdivided into 5 experimental groups: control group (C); Sham group (S); Ischemic group (I); Alcoholic group (A); and Ischemic and Alcoholized group (I+A): animals submitted to the same treatment of group A and after four weeks were submitted to focal cerebral ischemia during 90 minutes, followed by reperfusion of 48 hours. Were processed for histopathological analysis and immunohistochemistry (for the protein expression of CASPASE -3 and XIAP). RESULTS Greater histopathological changes were observed in the animals of groups I and I+A in the three areas analyzed. The neuronal loss was higher in the medial striatum region of the animals of groups I and I + A. The protein expression of CASPASE -3 was higher than that of XIAP in the groups I and I + A for both proteins. CONCLUSION The expression of XIAP was slightly higher where the histopathological changes and expression of CASPASE -3 was less evident.
Collapse
Affiliation(s)
- Vagner Sarraipo Schiavoni
- Fellow PhD degree, Postgraduate Program in Clinical Surgery, Department of Surgery and Anatomy, Medical School, Universidade de São Paulo (USP), Ribeirao Preto-SP, Brazil. Acquisition and interpretation of data, manuscript writing
| | - Jairo Pinheiro da Silva
- Fellow PhD degree, Postgraduate Program in Clinical Surgery, Department of Surgery and Anatomy, Medical School, USP, Ribeirao Preto-SP, Brazil. Technical procedures, manuscript writing
| | - Fermino Sanches Lizarte Neto
- Pos-doctoral Fellow student, Postgraduate Program in Clinical Surgery, Department of Surgery and Anatomy, Medical School, USP, Ribeirao Preto-SP, Brazil. Technical procedures, statistical analyses
| | - Múcio Luiz Cirino de Assis
- Fellow Master degree, Postgraduate Program in Clinical Surgery, Department of Surgery and Anatomy, Medical School, Ribeirao Preto-SP, Brazil. Technical procedures, statistical analyses
| | | | - Camila Albuquerque Melo de Carvalho
- Assistant Professor, Institute of Biological and Health Sciences, Universidade Federal de Alagoas (UFAL), Maceio-AL, Brazil. Technical procedures, statistical analyses, manuscript writing
| | | | - Carlos Gilberto Carlotti
- Full Professor, Department of Surgery and Anatomy, Medical School, USP, Ribeirao Preto-SP, Brazil. Design of the study, manuscript writing
| | - Benedicto Oscar Colli
- Full Professor, Department of Surgery and Anatomy, Medical School, USP, Ribeirao Preto-SP, Brazil. Design of the study, manuscript writing
| | - Luis Fernando Tirapelli
- Assistant Professor, Department of Surgery and Anatomy, Medical School, USP, Ribeirao Preto-SP, Brazil. Design of the study, manuscript writing
| |
Collapse
|
13
|
Nery B, Costa RAF, Pereira LCT, Quaggio E, Coronatto LH, Tirapelli DPDC, Carlotti CG. Spontaneous subdural hematoma associated with microcystic meningioma: first case report in the literature. Br J Neurosurg 2017; 33:428-431. [PMID: 28660808 DOI: 10.1080/02688697.2017.1346172] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Background: Non traumatic subdural hematomas are rare, especially those associated with intracranial meningiomas. Among the most common meningiomas associated with spontaneous bleeding are angioblastic and malignant meningioma variants. The pathophysiological mechanisms of this association are not yet fully understood. The association of chronic subdural hematoma with microcystic meningioma histological subtype has not yet been described in the literature. Case report: The authors present a case report of a patient with a spontaneous non traumatic chronic subdural hematoma associated with a microcystic subtype grade I meningioma of the parietal convexity. Epidemiological, etiology, natural history, pathophysiology, risk factors of bleeding and treatment options are reviewed. Conclusion: Spontaneous subdural hematomas associated with meningiomas are rare, specially related to the microcystic variant of meningioma. Careful pre-operative consideration of specific anatomy and pathophysiological features are paramount to their full treatment.
Collapse
Affiliation(s)
- Breno Nery
- a Department of Neurosurgery, São Francisco Hospital , Ribeirão Preto , SP , Brazil.,b Ribeirão Preto Medical School, Department of Surgery and Anatomy, University of São Paulo , São Paulo , Brazil
| | | | | | - Eduardo Quaggio
- a Department of Neurosurgery, São Francisco Hospital , Ribeirão Preto , SP , Brazil
| | | | | | - Carlos Gilberto Carlotti
- b Ribeirão Preto Medical School, Department of Surgery and Anatomy, University of São Paulo , São Paulo , Brazil
| |
Collapse
|
14
|
Carvalho CAMD, Tirapelli DPDC, Rodrigues AR, Lizarte FS, Novais PC, Silva JP, Carlotti CG, Colli BO, Tirapelli LF. Morphological and immunohistochemical analysis of apoptosis in the cerebellum of rats subjected to focal cerebral ischemia with or without alcoholism model. Acta Cir Bras 2017; 31:629-637. [PMID: 27737349 DOI: 10.1590/s0102-865020160090000009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Accepted: 08/18/2016] [Indexed: 01/08/2023] Open
Abstract
PURPOSE: To evaluated histopathological changes, morphometric and expression of proteins CASPASE-3, BCL-2 and XIAP related to apoptosis in the cerebellum after induction of temporary focal cerebral ischemia followed by reperfusion, with or without a model of chronic alcoholism. METHODS: Fifty Wistar rats were used and divided into: control group (C), sham group (S), ischemic group (I), alcoholic group (A), and ischemic and alcoholic group (IA). The cerebellum samples collected were stained for histopathological and morphometric analysis and immunohistochemistry study. RESULTS: Histopathological changes were observed a greater degree in animals in groups A and IA. The morphometric study showed no difference in the amount of cells in the granular layer of the cerebellum between the groups. The expression of CASPASE-3 was higher than BCL-2 and XIAP in the groups A and IA. CONCLUSION: We observed correlation between histopathological changes and the occurrence of apoptosis in cerebellar cortex.
Collapse
Affiliation(s)
- Camila Albuquerque Melo de Carvalho
- Assistant Professor, Institute of Biological and Health Sciences, Universidade Federal de Alagoas (UFAL). Fellow PhD degree, Clinical Surgery Postgraduate Program, Department of Surgery and Anatomy, School of Medicine of Ribeirao Preto, Universidade de São Paulo (USP), Ribeirao Preto-SP, Brazil. Acquisition and interpretation of data, manuscript writing
| | - Daniela Pretti da Cunha Tirapelli
- Associate Professor, Department of Surgery and Anatomy, Surgical Clinic Program, School of Medicine of Ribeirao Preto, USP, Brazil. Intellectual, conception and design of the study; manuscript writing
| | - Andressa Romualdo Rodrigues
- Fellow PhD degree, Clinical Surgery Postgraduate Program, Department of Surgery and Anatomy, School of Medicine of Ribeirao Preto, USP, Brazil. Technical procedures, manuscript writing
| | - Fermino Sanches Lizarte
- Fellow Pos-doctoral degree, Clinical Surgery Postgraduate Program, Department of Surgery and Anatomy, School of Medicine of Ribeirao Preto, USP, Brazil.Technical procedures, manuscript writing
| | - Paulo Cézar Novais
- Assistant Professor, Department of Health Sciences, Universidade de Marília (UNIMAR). Fellow Pos-doctoral degree, Clinical Surgery Postgraduate Program, Department of Surgery and Anatomy, School of Medicine of Ribeirao Preto, USP, Brazil. Technical procedures, manuscript writing
| | - Jairo Pinheiro Silva
- Fellow PhD degree, Clinical Surgery Postgraduate Program, Department of Surgery and Anatomy, School of Medicine of Ribeirao Preto, USP, Brazil. Technical procedures, manuscript writing
| | - Carlos Gilberto Carlotti
- Full Professor, Division of Neurosurgery, Department of Surgery and Anatomy, School of Medicine of Ribeirao Preto, USP, Brazil. Scientific and intellectual content of the study, manuscript writing
| | - Benedicto Oscar Colli
- Full Professor, Division of Neurosurgery, Department of Surgery and Anatomy, School of Medicine of Ribeirao Preto, USP, Brazil. Scientific and intellectual content of the study, manuscript writing
| | - Luís Fernando Tirapelli
- Associate Professor, Department of Surgery and Anatomy, School of Medicine of Ribeirao Preto, USP, Brazil. Conception, design, intellectual and scientific content of the study; manuscript writing, critical revision; supervision of all phases of the study
| |
Collapse
|
15
|
de Sousa JF, Torrieri R, Serafim RB, Di Cristofaro LFM, Escanfella FD, Ribeiro R, Zanette DL, Paçó-Larson ML, da Silva WA, Tirapelli DPDC, Neder L, Carlotti CG, Valente V. Expression signatures of DNA repair genes correlate with survival prognosis of astrocytoma patients. Tumour Biol 2017; 39:1010428317694552. [PMID: 28378638 DOI: 10.1177/1010428317694552] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Astrocytomas are the most common primary brain tumors. They are very resistant to therapies and usually progress rapidly to high-grade lesions. Here, we investigated the potential role of DNA repair genes in astrocytoma progression and resistance. To this aim, we performed a polymerase chain reaction array-based analysis focused on DNA repair genes and searched for correlations between expression patters and survival prognoses. We found 19 genes significantly altered. Combining these genes in all possible arrangements, we found 421 expression signatures strongly associated with poor survival. Importantly, five genes (DDB2, EXO1, NEIL3, BRCA2, and BRIP1) were independently correlated with worse prognoses, revealing single-gene signatures. Moreover, silencing of EXO1, which is remarkably overexpressed, promoted faster restoration of double-strand breaks, while NEIL3 knockdown, also highly overexpressed, caused an increment in DNA damage and cell death after irradiation of glioblastoma cells. These results disclose the importance of DNA repair pathways for the maintenance of genomic stability of high-grade astrocytomas and suggest that EXO1 and NEIL3 overexpression confers more efficiency for double-strand break repair and resistance to reactive oxygen species, respectively. Thereby, we highlight these two genes as potentially related with tumor aggressiveness and promising candidates as novel therapeutic targets.
Collapse
Affiliation(s)
- Juliana Ferreira de Sousa
- 1 Department of Clinical Analysis, Faculty of Pharmaceutical Sciences of Araraquara, University of São Paulo State, Araraquara, Brazil.,2 Department of Cellular and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Raul Torrieri
- 3 FAEPA, Center for Medical Genomics (CMG) of the Clinical Hospital, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Rodolfo Bortolozo Serafim
- 1 Department of Clinical Analysis, Faculty of Pharmaceutical Sciences of Araraquara, University of São Paulo State, Araraquara, Brazil.,2 Department of Cellular and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Luis Fernando Macedo Di Cristofaro
- 1 Department of Clinical Analysis, Faculty of Pharmaceutical Sciences of Araraquara, University of São Paulo State, Araraquara, Brazil.,2 Department of Cellular and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Fábio Dalbon Escanfella
- 2 Department of Cellular and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Rodrigo Ribeiro
- 2 Department of Cellular and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Dalila Lucíola Zanette
- 4 Department of Genetics, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil.,5 Regional Blood Center of Ribeirão Preto and Center for Cell-Based Therapy-CEPID/FAPESP, Ribeirão Preto, Brazil.,6 National Institute of Science and Technology in Stem cell and Cell Therapy, Ribeirão Preto, Brazil
| | - Maria Luisa Paçó-Larson
- 2 Department of Cellular and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Wilson Araujo da Silva
- 4 Department of Genetics, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil.,5 Regional Blood Center of Ribeirão Preto and Center for Cell-Based Therapy-CEPID/FAPESP, Ribeirão Preto, Brazil.,6 National Institute of Science and Technology in Stem cell and Cell Therapy, Ribeirão Preto, Brazil.,7 Center for Integrative Systems Biology (CISBi), NAP/USP, Ribeirão Preto, Brazil
| | | | - Luciano Neder
- 9 Department of Pathology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Carlos Gilberto Carlotti
- 7 Center for Integrative Systems Biology (CISBi), NAP/USP, Ribeirão Preto, Brazil.,8 Department of Surgery and Anatomy, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Valeria Valente
- 1 Department of Clinical Analysis, Faculty of Pharmaceutical Sciences of Araraquara, University of São Paulo State, Araraquara, Brazil.,2 Department of Cellular and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil.,7 Center for Integrative Systems Biology (CISBi), NAP/USP, Ribeirão Preto, Brazil
| |
Collapse
|
16
|
Peixoto-Santos JE, Kandratavicius L, Velasco TR, Assirati JA, Carlotti CG, Scandiuzzi RC, Salmon CEG, Santos ACD, Leite JP. Individual hippocampal subfield assessment indicates that matrix macromolecules and gliosis are key elements for the increased T2 relaxation time seen in temporal lobe epilepsy. Epilepsia 2016; 58:149-159. [PMID: 27864825 DOI: 10.1111/epi.13620] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2016] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Increased T2 relaxation time is often seen in temporal lobe epilepsy (TLE) with hippocampal sclerosis. Water content directly affects the effective T2 in a voxel. Our aim was to evaluate the relation between T2 values and two molecules associated with brain water homeostasis aquaporin 4 (AQP4) and chondroitin sulfate proteoglycan (CSPG), as well as cellular populations in the hippocampal region of patients with TLE. METHODS Hippocampal T2 imaging and diffusion tensor imaging (DTI) were obtained from 42 drug-resistant patients with TLE and 20 healthy volunteers (radiologic controls, RCs). A similar protocol (ex vivo) was applied to hippocampal sections from the same TLE cases and 14 autopsy control hippocampi (histologic and radiologic controls, HRCs), and each hippocampal subfield was evaluated. Hippocampal sections from TLE cases and HRC controls were submitted to immunohistochemistry for neurons (neuron nuclei [NeuN]), reactive astrocytes (glial fibrillary acidic protein [GFAP]), activated microglia (human leukocyte antigen-D-related [HLA-DR]), polarized AQP4, and CSPG. RESULTS Patients with TLE had higher in vivo and ex vivo hippocampal T2 relaxation time. Hippocampi from epilepsy cases had lower neuron density, higher gliosis, decreased AQP4 polarization, and increased CSPG immunoreactive area. In vivo relaxation correlated with astrogliosis in the subiculum and extracellular CSPG in the hilus. Ex vivo T2 relaxation time correlated with astrogliosis in the hilus, CA4, and subiculum, and with microgliosis in CA1. The difference between in vivo and ex vivo relaxation ratio correlated with mean diffusivity and with the immunopositive area for CSPG in the hilus. SIGNIFICANCE Our data indicate that astrogliosis, microgliosis, and CSPG expression correlate with the increased T2 relaxation time seen in the hippocampi of patients with TLE.
Collapse
Affiliation(s)
- Jose Eduardo Peixoto-Santos
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Ludmyla Kandratavicius
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Tonicarlo Rodrigues Velasco
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Joao Alberto Assirati
- Department of Surgery and Anatomy, Ribeirao Preto School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Carlos Gilberto Carlotti
- Department of Surgery and Anatomy, Ribeirao Preto School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Renata Caldo Scandiuzzi
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Carlos Ernesto Garrido Salmon
- Department of Physics and Mathematics, Faculty of Philosophy, Science and Languages of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Antonio Carlos Dos Santos
- Department of Internal Medicine, Ribeirao Preto School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Joao Pereira Leite
- Department of Neurosciences and Behavioral Sciences, Ribeirao Preto School of Medicine, University of Sao Paulo, Ribeirao Preto, Brazil
| |
Collapse
|
17
|
Stetson LC, Ferreira de Souza C, Maistro Malta T, Sarraf Sabedot T, Ostrom Q, Liao P, Pretti da Cunha Tirapelli D, Neder L, Gilberto Carlotti C, Akbani R, Salama S, Poisson L, Brat D, Noushmehr H, Barnholtz-Sloan J. Abstract 780: Multi-omic profiling of gliomas reveals distinct DNA methylation changes at tumor recurrence. Cancer Res 2016. [DOI: 10.1158/1538-7445.am2016-780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Varying possibilities of tumor relapse for lower grade glioma (LGG, WHO grade II and III) and glioblastoma (GBM, WHO grade IV) have led to heterogenous clinical outcomes for patients. Our current study aims to establish a molecular profile of recurrence of matched primary and recurrent LGG (n = 28) and recurrent GBM (n = 24) tumor samples. The Cancer Genome Atlas (TCGA) has comprehensively profiled these matched primary/recurrent tumor sets; whole genomes, coding exomes, methylomes, and transcriptomes have been sequenced, and the samples have undergone targeted profiling of the proteome. While unsupervised analysis techniques have not led to a clear recurrence signature, supervised analysis methods have revealed interesting patterns. Protein profiling has shown that recurrent gliomas retain the overall molecular signature of their primary counterpart, but the DNA damage response, apoptosis and RTK pathways are downregulated in the recurrent gliomas, in contrast to RAS/MAPK, PI3K/AKT, and EMT pathways, which are upregulated. Whole genome sequencing and rearrangement analysis have revealed increased genomic complexity among most recurrent gliomas as well as new fusions of interest in recurrent LGG samples (PTPRZ1-MET and involving ATRX). Using genome-wide Illumina HumanMethylation 450K data we observed that 78.6% of LGGs showed depletion of DNA methylation at recurrence and 50% of GBM tumors showed an enrichment of DNA methylation at recurrence. Patient centric enrichment analysis allowed us to discover a candidate biological subgroup characterized by a subset of LGG recurrences (50%) exhibiting an aberrant CpG methylation loss at inintergenic opensea regions when compared with canonical CpG islands and shores (fold > 1.3 and confidence intervals of 99%). Importantly, inspection of CpG sites significantly hypomethylated at openseas showed that this pronounced epigenetic signature maps to candidate TSS distal and hypomethylated enhancers. The gene-targets of these hypomethylated CpG sites show a corresponding up-regulation of expression. Pathway analysis has demonstrated that these upregulated genes are involved in cellular growth and proliferation, cellular function and maintenance, and cell cycle regulation. Our results provide evidence that DNA methylation may represent a stable signature of glioma recurrence and that the crosstalk between DNA hypomethylation at openseas and chromosomal instability may be involved in glioma recurrence. We plan to further integrate our findings between data types and correlate with treatment and patient clinical outcome.
Citation Format: Lindsay C. Stetson, Camila Ferreira de Souza, Tathiane Maistro Malta, Thais Sarraf Sabedot, Quinn Ostrom, Peter Liao, Daniela Pretti da Cunha Tirapelli, Luciano Neder, Carlos Gilberto Carlotti, Rehan Akbani, Sofie Salama, Laila Poisson, Daniel Brat, The Cancer Genome Atlas Network, Houtan Noushmehr, Jill Barnholtz-Sloan. Multi-omic profiling of gliomas reveals distinct DNA methylation changes at tumor recurrence. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 780.
Collapse
Affiliation(s)
| | | | | | | | - Quinn Ostrom
- 1Case Western Reserve University School of Medicine, Cleveland, OH
| | - Peter Liao
- 1Case Western Reserve University School of Medicine, Cleveland, OH
| | | | - Luciano Neder
- 2Ribeirão Preto Medical School, University of Sao Paulo, Brazil
| | | | - Rehan Akbani
- 3University of Texas, MD Anderson Cancer Center, TX
| | | | | | - Daniel Brat
- 6Winship Cancer Institute of Emory University, GA
| | | | | | | |
Collapse
|
18
|
Peixoto-Santos JE, Galvis-Alonso OY, Velasco TR, Kandratavicius L, Assirati JA, Carlotti CG, Scandiuzzi RC, Serafini LN, Leite JP. Correction: Increased Metallothionein I/II Expression in Patients with Temporal Lobe Epilepsy. PLoS One 2016; 11:e0159122. [PMID: 27388505 PMCID: PMC4936681 DOI: 10.1371/journal.pone.0159122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
[This corrects the article DOI: 10.1371/journal.pone.0044709.].
Collapse
|
19
|
Abstract
OBJECTIVE Accurate knowledge of the anatomy of the straight sinus (SS) is relevant for surgical purposes. During one surgical procedure involving the removal of part of the SS wall, the authors observed that the venous blood flow was maintained in the SS, possibly through a vein-like structure within the dural sinus or dural multiple layers. This observation and its divergence from descriptions of the histological features of the SS walls motivated the present study. The authors aimed to investigate whether it is possible to dissect the SS walls while keeping the lumen intact, and to describe the histological and ultrastructural composition of the SS wall. METHODS A total of 22 cadaveric specimens were used. The SS was divided into three portions: anterior, middle, and posterior. The characteristics of the SS walls were analyzed, and the feasibility of dissecting them while keeping the SS lumen intact was assessed. The thickness and the number of collagen fibers and other tissues in the SS walls were compared with the same variables in other venous sinuses. Masson's trichrome and Verhoeff's stains were used to assess collagen and elastic fibers, respectively. The data were analyzed using Zeiss image analysis software (KS400). RESULTS A vein-like structure independent of the SS walls was found in at least one of the portions of the SS in 8 of 22 samples (36.36%). The inferior wall could be delaminated in at least one portion in 21 of 22 samples (95.45%), whereas the lateral walls could seldom be delaminated. The inferior wall of the SS was thicker (p < 0.05) and exhibited less collagen and greater amounts of other tissues-including elastic fibers, connective tissue, blood vessels, and nerve fibers (p < 0.05)-compared with the lateral walls. Transmission electron microscopy revealed the presence of muscle fibers at a level deeper than that of the subendothelial connective tissue in the inferior wall of the SS, extending from its junction with the great cerebral vein to the confluence of sinuses. CONCLUSIONS The presence of a structure within the SS that can maintain the venous blood flow despite the dural wall might be considered an anatomical variation. The greater thickness of the inferior wall of the SS compared with the lateral walls is mainly due to the presence of larger amounts of tissues other than collagen. Delamination of the inferior wall of the SS was mostly possible in its inferior wall, but an attempt to delaminate the lateral walls is not recommended. Ultrastructural assessment corroborated a recent report of the presence of muscle fibers in the inferior wall of the SS.
Collapse
Affiliation(s)
| | - Luis Fernando Tirapelli
- Division of Anatomy, Department of Surgery, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | | |
Collapse
|
20
|
Sonvenso DK, Itikawa EN, Santos MV, Santos LA, Trevisan AC, Bianchin MM, Pitella FA, Kato M, Carlotti CG, Busatto GF, Velasco TR, Santos AC, Leite JP, Sakamoto AC, Machado HR, Nunes AA, Wichert-Ana L. Systematic review of the efficacy in seizure control and safety of neuronavigation in epilepsy surgery: The need for well-designed prospective studies. Seizure 2015; 31:99-107. [DOI: 10.1016/j.seizure.2015.07.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 07/14/2015] [Accepted: 07/16/2015] [Indexed: 10/23/2022] Open
|
21
|
Peixoto-Santos JE, Velasco TR, Galvis-Alonso OY, Araujo D, Kandratavicius L, Assirati JA, Carlotti CG, Scandiuzzi RC, Santos ACD, Leite JP. Temporal lobe epilepsy patients with severe hippocampal neuron loss but normal hippocampal volume: Extracellular matrix molecules are important for the maintenance of hippocampal volume. Epilepsia 2015. [PMID: 26218733 DOI: 10.1111/epi.13082] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Hippocampal sclerosis is a common finding in patients with temporal lobe epilepsy (TLE), and magnetic resonance imaging (MRI) studies associate the reduction of hippocampal volume with the neuron loss seen on histologic evaluation. Astrogliosis and increased levels of chondroitin sulfate, a major component of brain extracellular matrix, are also seen in hippocampal sclerosis. Our aim was to evaluate the association between hippocampal volume and chondroitin sulfate, as well as neuronal and astroglial populations in the hippocampus of patients with TLE. METHODS Patients with drug-resistant TLE were subdivided, according to hippocampal volume measured by MRI, into two groups: hippocampal atrophy (HA) or normal volume (NV) cases. Hippocampi from TLE patients and age-matched controls were submitted to immunohistochemistry to evaluate neuronal population, astroglial population, and chondroitin sulfate expression with antibodies against neuron nuclei protein (NeuN), glial fibrillary acidic protein (GFAP), and chondroitin sulfate (CS-56) antigens, respectively. RESULTS Both TLE groups were clinically similar. NV cases had higher hippocampal volume, both ipsilateral and contralateral, when compared to HA. Compared to controls, NV and HA patients had reduced neuron density, and increased GFAP and CS-56 immunopositive area. There was no statistical difference between NV and HA groups in neuron density or immunopositive areas for GFAP and CS-56. Hippocampal volume correlated positively with neuron density in CA1 and prosubiculum, and with immunopositive areas for CS-56 in CA1, and negatively with immunopositive area for GFAP in CA1. Multiple linear regression analysis indicated that both neuron density and CS-56 immunopositive area in CA1 were statistically significant predictors of hippocampal volume. SIGNIFICANCE Our findings indicate that neuron density and chondroitin sulfate immunopositive area in the CA1 subfield are crucial for the hippocampal volume, and that chondroitin sulfate is important for the maintenance of a normal hippocampal volume in some cases with severe neuron loss.
Collapse
Affiliation(s)
- Jose Eduardo Peixoto-Santos
- Department of Neurosciences and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Tonicarlo Rodrigues Velasco
- Department of Neurosciences and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Orfa Yineth Galvis-Alonso
- Department of Molecular Biology, São José do Rio Preto Medical School, Sao Jose do Rio Preto, Sao Paulo, Brazil
| | - David Araujo
- Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Ludmyla Kandratavicius
- Department of Neurosciences and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Joao Alberto Assirati
- Department of Surgery, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, Brazil
| | - Carlos Gilberto Carlotti
- Department of Surgery, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, Brazil
| | - Renata Caldo Scandiuzzi
- Department of Neurosciences and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Antonio Carlos dos Santos
- Department of Internal Medicine, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, Brazil
| | - Joao Pereira Leite
- Department of Neurosciences and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, Sao Paulo, Brazil
| |
Collapse
|
22
|
Brat DJ, Verhaak RGW, Aldape KD, Yung WKA, Salama SR, Cooper LAD, Rheinbay E, Miller CR, Vitucci M, Morozova O, Robertson AG, Noushmehr H, Laird PW, Cherniack AD, Akbani R, Huse JT, Ciriello G, Poisson LM, Barnholtz-Sloan JS, Berger MS, Brennan C, Colen RR, Colman H, Flanders AE, Giannini C, Grifford M, Iavarone A, Jain R, Joseph I, Kim J, Kasaian K, Mikkelsen T, Murray BA, O'Neill BP, Pachter L, Parsons DW, Sougnez C, Sulman EP, Vandenberg SR, Van Meir EG, von Deimling A, Zhang H, Crain D, Lau K, Mallery D, Morris S, Paulauskis J, Penny R, Shelton T, Sherman M, Yena P, Black A, Bowen J, Dicostanzo K, Gastier-Foster J, Leraas KM, Lichtenberg TM, Pierson CR, Ramirez NC, Taylor C, Weaver S, Wise L, Zmuda E, Davidsen T, Demchok JA, Eley G, Ferguson ML, Hutter CM, Mills Shaw KR, Ozenberger BA, Sheth M, Sofia HJ, Tarnuzzer R, Wang Z, Yang L, Zenklusen JC, Ayala B, Baboud J, Chudamani S, Jensen MA, Liu J, Pihl T, Raman R, Wan Y, Wu Y, Ally A, Auman JT, Balasundaram M, Balu S, Baylin SB, Beroukhim R, Bootwalla MS, Bowlby R, Bristow CA, Brooks D, Butterfield Y, Carlsen R, Carter S, Chin L, Chu A, Chuah E, Cibulskis K, Clarke A, Coetzee SG, Dhalla N, Fennell T, Fisher S, Gabriel S, Getz G, Gibbs R, Guin R, Hadjipanayis A, Hayes DN, Hinoue T, Hoadley K, Holt RA, Hoyle AP, Jefferys SR, Jones S, Jones CD, Kucherlapati R, Lai PH, Lander E, Lee S, Lichtenstein L, Ma Y, Maglinte DT, Mahadeshwar HS, Marra MA, Mayo M, Meng S, Meyerson ML, Mieczkowski PA, Moore RA, Mose LE, Mungall AJ, Pantazi A, Parfenov M, Park PJ, Parker JS, Perou CM, Protopopov A, Ren X, Roach J, Sabedot TS, Schein J, Schumacher SE, Seidman JG, Seth S, Shen H, Simons JV, Sipahimalani P, Soloway MG, Song X, Sun H, Tabak B, Tam A, Tan D, Tang J, Thiessen N, Triche T, Van Den Berg DJ, Veluvolu U, Waring S, Weisenberger DJ, Wilkerson MD, Wong T, Wu J, Xi L, Xu AW, Yang L, Zack TI, Zhang J, Aksoy BA, Arachchi H, Benz C, Bernard B, Carlin D, Cho J, DiCara D, Frazer S, Fuller GN, Gao J, Gehlenborg N, Haussler D, Heiman DI, Iype L, Jacobsen A, Ju Z, Katzman S, Kim H, Knijnenburg T, Kreisberg RB, Lawrence MS, Lee W, Leinonen K, Lin P, Ling S, Liu W, Liu Y, Liu Y, Lu Y, Mills G, Ng S, Noble MS, Paull E, Rao A, Reynolds S, Saksena G, Sanborn Z, Sander C, Schultz N, Senbabaoglu Y, Shen R, Shmulevich I, Sinha R, Stuart J, Sumer SO, Sun Y, Tasman N, Taylor BS, Voet D, Weinhold N, Weinstein JN, Yang D, Yoshihara K, Zheng S, Zhang W, Zou L, Abel T, Sadeghi S, Cohen ML, Eschbacher J, Hattab EM, Raghunathan A, Schniederjan MJ, Aziz D, Barnett G, Barrett W, Bigner DD, Boice L, Brewer C, Calatozzolo C, Campos B, Carlotti CG, Chan TA, Cuppini L, Curley E, Cuzzubbo S, Devine K, DiMeco F, Duell R, Elder JB, Fehrenbach A, Finocchiaro G, Friedman W, Fulop J, Gardner J, Hermes B, Herold-Mende C, Jungk C, Kendler A, Lehman NL, Lipp E, Liu O, Mandt R, McGraw M, Mclendon R, McPherson C, Neder L, Nguyen P, Noss A, Nunziata R, Ostrom QT, Palmer C, Perin A, Pollo B, Potapov A, Potapova O, Rathmell WK, Rotin D, Scarpace L, Schilero C, Senecal K, Shimmel K, Shurkhay V, Sifri S, Singh R, Sloan AE, Smolenski K, Staugaitis SM, Steele R, Thorne L, Tirapelli DPC, Unterberg A, Vallurupalli M, Wang Y, Warnick R, Williams F, Wolinsky Y, Bell S, Rosenberg M, Stewart C, Huang F, Grimsby JL, Radenbaugh AJ, Zhang J. Comprehensive, Integrative Genomic Analysis of Diffuse Lower-Grade Gliomas. N Engl J Med 2015; 372:2481-98. [PMID: 26061751 PMCID: PMC4530011 DOI: 10.1056/nejmoa1402121] [Citation(s) in RCA: 2125] [Impact Index Per Article: 236.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Diffuse low-grade and intermediate-grade gliomas (which together make up the lower-grade gliomas, World Health Organization grades II and III) have highly variable clinical behavior that is not adequately predicted on the basis of histologic class. Some are indolent; others quickly progress to glioblastoma. The uncertainty is compounded by interobserver variability in histologic diagnosis. Mutations in IDH, TP53, and ATRX and codeletion of chromosome arms 1p and 19q (1p/19q codeletion) have been implicated as clinically relevant markers of lower-grade gliomas. METHODS We performed genomewide analyses of 293 lower-grade gliomas from adults, incorporating exome sequence, DNA copy number, DNA methylation, messenger RNA expression, microRNA expression, and targeted protein expression. These data were integrated and tested for correlation with clinical outcomes. RESULTS Unsupervised clustering of mutations and data from RNA, DNA-copy-number, and DNA-methylation platforms uncovered concordant classification of three robust, nonoverlapping, prognostically significant subtypes of lower-grade glioma that were captured more accurately by IDH, 1p/19q, and TP53 status than by histologic class. Patients who had lower-grade gliomas with an IDH mutation and 1p/19q codeletion had the most favorable clinical outcomes. Their gliomas harbored mutations in CIC, FUBP1, NOTCH1, and the TERT promoter. Nearly all lower-grade gliomas with IDH mutations and no 1p/19q codeletion had mutations in TP53 (94%) and ATRX inactivation (86%). The large majority of lower-grade gliomas without an IDH mutation had genomic aberrations and clinical behavior strikingly similar to those found in primary glioblastoma. CONCLUSIONS The integration of genomewide data from multiple platforms delineated three molecular classes of lower-grade gliomas that were more concordant with IDH, 1p/19q, and TP53 status than with histologic class. Lower-grade gliomas with an IDH mutation either had 1p/19q codeletion or carried a TP53 mutation. Most lower-grade gliomas without an IDH mutation were molecularly and clinically similar to glioblastoma. (Funded by the National Institutes of Health.).
Collapse
|
23
|
Kandratavicius L, Peixoto-Santos JE, Monteiro MR, Scandiuzzi RC, Carlotti CG, Assirati JA, Hallak JE, Leite JP. Mesial temporal lobe epilepsy with psychiatric comorbidities: a place for differential neuroinflammatory interplay. J Neuroinflammation 2015; 12:38. [PMID: 25889039 PMCID: PMC4347571 DOI: 10.1186/s12974-015-0266-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Accepted: 02/10/2015] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Despite the strong association between epilepsy and psychiatric comorbidities, few biological substrates are currently described. We have previously reported neuropathological alterations in mesial temporal lobe epilepsy (MTLE) patients with major depression and psychosis that suggest a morphological and neurochemical basis for psychopathological symptoms. Neuroinflammatory-related structures and molecules might be part of the altered neurochemical milieu underlying the association between epilepsy and psychiatric comorbidities, and such features have not been previously investigated in humans. METHODS MTLE hippocampi of subjects without psychiatric history (MTLEW), MTLE + major depression (MTLE + D), and MTLE + interictal psychosis (MTLE + P) derived from epilepsy surgery and control necropsies were investigated for reactive astrocytes (glial fibrillary acidic protein (GFAP)), activated microglia (human leukocyte antigen, MHC class II (HLA-DR)), glial metallothionein-I/II (MT-I/II), and aquaporin 4 (AQP4) immunohistochemistry. RESULTS We found an increased GFAP immunoreactive area in the molecular layers, granule cell layer, and cornus ammonis region 2 (CA2) and cornus ammonis region 1 (CA1) of MTLEW and MTLE + P, respectively, compared to MTLE + D. HLA-DR immunoreactive area was higher in cornus ammonis region 3 (CA3) of MTLE + P, compared to MTLE + D and MTLEW, and in the hilus, when compared to MTLEW. MTLEW cases showed increased MT-I/II area in the granule cell layer and CA1, compared to MTLE + P, and in the parasubiculum, when compared to MTLE + D and MTLE + P. Differences between MTLE and control, such as astrogliosis, microgliosis, increased MT-I/II, and decreased perivascular AQP4 in the epileptogenic hippocampus, were in agreement to what is currently described in the literature. CONCLUSIONS Neuroinflammatory-related molecules in MTLE hippocampus show a distinct pattern of expression when patients present with a comorbid psychiatric diagnosis, similar to what is found in the pure forms of schizophrenia and major depression. Future studies focusing on inflammatory characteristics of MTLE with psychiatric comorbidities might help in the design of better therapeutic strategies.
Collapse
Affiliation(s)
- Ludmyla Kandratavicius
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao Paulo (USP), Av Bandeirantes 3900, CEP 14049-900, Ribeirao Preto, SP, Brazil. .,Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), USP, Ribeirao Preto, Brazil.
| | - Jose Eduardo Peixoto-Santos
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao Paulo (USP), Av Bandeirantes 3900, CEP 14049-900, Ribeirao Preto, SP, Brazil.
| | - Mariana Raquel Monteiro
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao Paulo (USP), Av Bandeirantes 3900, CEP 14049-900, Ribeirao Preto, SP, Brazil.
| | - Renata Caldo Scandiuzzi
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao Paulo (USP), Av Bandeirantes 3900, CEP 14049-900, Ribeirao Preto, SP, Brazil.
| | | | | | - Jaime Eduardo Hallak
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao Paulo (USP), Av Bandeirantes 3900, CEP 14049-900, Ribeirao Preto, SP, Brazil. .,Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), USP, Ribeirao Preto, Brazil. .,National Institute of Science and Technology in Translational Medicine (INCT-TM - CNPq), Ribeirao Preto, Brazil.
| | - Joao Pereira Leite
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao Paulo (USP), Av Bandeirantes 3900, CEP 14049-900, Ribeirao Preto, SP, Brazil. .,Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), USP, Ribeirao Preto, Brazil.
| |
Collapse
|
24
|
Kandratavicius L, Hallak JE, Carlotti CG, Assirati JA, Leite JP. Neurotrophin receptors expression in mesial temporal lobe epilepsy with and without psychiatric comorbidities and their relation with seizure type and surgical outcome. Acta Neuropathol Commun 2014; 2:81. [PMID: 25027171 PMCID: PMC4149196 DOI: 10.1186/s40478-014-0081-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 06/29/2014] [Indexed: 12/30/2022] Open
Abstract
Epilepsy and psychiatric comorbidities are frequently associated, but their common biological substrate is unknown. We have previously reported altered structural elements and neurotrophins (NTs) expression in mesial temporal lobe epilepsy (MTLE) patients with psychiatric comorbidities. NTs receptors can regulate neurotransmission and promote neuroplasticity, being important candidates in the regulation and manifestation of psychopatological states and seizure-related events. MTLE hippocampi of subjects without psychiatric history, MTLE + major depression, MTLE + interictal psychosis derived from epilepsy surgery, and control necropsies were investigated for p75NTR, TrkB, TrkA, and TrkC immunohistochemistry. Increased expression of p75NTR, decreased TrkA, unaltered TrkC, and complex alterations involving TrkB expression were seen in MTLE groups. Increased TrkB expression in patients without complete seizure remission and in those with secondarily generalized seizures was seen. Decreased p75NTR expression associated with interictal psychosis, and increased TrkB in those with psychosis or major depression was also reported, although their p75NTR/TrkB ratios were lower than in MTLE without psychiatric comorbidities. Our results provide evidence of alterations in expression of NTs receptors in the epileptogenic hippocampus that are differentially modulated in presence of psychiatric comorbidities. As already explored in animal models, even in chronic human MTLE increased TrkB expression, among other NT receptors alterations, may play a major role in seizure type, frequency and surgery outcome.
Collapse
|
25
|
Saggioro FP, Neder L, Stávale JN, Paixão-Becker ANP, Malheiros SM, Soares FA, Pittella JEH, Matias CCM, Colli BO, Carlotti CG, Franco M. Fas, FasL, and cleaved caspases 8 and 3 in glioblastomas: A tissue microarray-based study. Pathol Res Pract 2014; 210:267-73. [DOI: 10.1016/j.prp.2013.12.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 12/03/2013] [Accepted: 12/30/2013] [Indexed: 02/04/2023]
|
26
|
Pezuk JA, Brassesco MS, Morales AG, de Oliveira JC, de Paula Queiroz RG, Machado HR, Carlotti CG, Neder L, Scrideli CA, Tone LG. Polo-like kinase 1 inhibition causes decreased proliferation by cell cycle arrest, leading to cell death in glioblastoma. Cancer Gene Ther 2013; 20:499-506. [PMID: 23887645 DOI: 10.1038/cgt.2013.46] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 05/19/2013] [Indexed: 02/02/2023]
Abstract
Glioblastoma (GBM) is one of the most aggressive central nervous system tumors with a patient's median survival of <1 year. Polo-like kinases (PLKs) are a family of serine/threonine kinases that have key roles in cell cycle control and DNA-damage response. We evaluated PLK1, 2, 3 and 4 gene expression in 8 GBM cell lines and 17 tumor samples, and analyzed the effect of the PLK1 inhibition on SF188 and T98G GBM cell lines and 13 primary cultures. Our data showed PLK1 overexpression and a variable altered expression of PLK2, 3 and 4 genes in GBM tumor samples and cell lines. Treatments with nanomolar concentrations of BI 2536, BI 6727, GW843682X or GSK461364 caused a significant decrease in GBM cells proliferation. Colony formation was also found to be inhibited (P<0.05), whereas apoptosis rate and mitotic index were significantly increased (P<0.05) after PLK1 inhibition in both GBM cell lines. Cell cycle analysis showed an arrest at G2 (P<0.05) and cell invasion was also decreased after PLK1 inhibition. Furthermore, simultaneous combinations of BI 2536 and temozolomide produced synergistic effects for both the cell lines after 48 h of treatment. Our findings suggest that PLK1 might be a promising target for the treatment of GBMs.
Collapse
Affiliation(s)
- J A Pezuk
- Department of Genetics, Faculty of Medicine of Ribeirão Preto, University of São Paulo
| | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Kandratavicius L, Rosa-Neto P, Monteiro MR, Guiot MC, Assirati JA, Carlotti CG, Kobayashi E, Leite JP. Distinct increased metabotropic glutamate receptor type 5 (mGluR5) in temporal lobe epilepsy with and without hippocampal sclerosis. Hippocampus 2013; 23:1212-30. [PMID: 23804486 PMCID: PMC4165311 DOI: 10.1002/hipo.22160] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2013] [Indexed: 12/04/2022]
Abstract
Metabotropic glutamate receptor type 5 (mGluR5) upregulation in temporal lobe epilepsy (TLE) and the correlation of its expression with features of hippocampal sclerosis (HS) remains unclear. Here we characterized mGluR5 immunoreactivity in hippocampus, entorhinal cortex (EC), and subiculum of TLE specimens with confirmed HS, with neocortical TLE (non-HS) and necropsy controls. We correlated mGluR5 immunoreactivity with neuronal density, mossy fiber sprouting, astrogliosis (GFAP), and dendritic alterations (MAP2). TLE specimens showed increased mGluR5 expression, which was most pronounced in the EC, subiculum, CA2, and dentate gyrus outer molecular layer. Increased mGluR5 expression was seen in hippocampal head and body segments and was independent of neuronal density, astrogliosis, or dendritic alterations. Positive correlation between mGluR5 expression with mossy fiber sprouting and with MAP2 in CA3 and CA1 was found only in HS specimens. Negative correlation between mGluR5 expression with seizure frequency and epilepsy duration was found only in non-HS cases. Specimens from HS patients without previous history of febrile seizure (FS) showed higher mGluR5 and MAP2 expression in CA2. Our study suggests that mGluR5 upregulation is part of a repertoire of post-synaptic adaptations that might control overexcitation and excessive glutamate release rather than a dysfunction that leads to seizure facilitation. That would explain why non-HS cases, on which seizures are likely to originate outside the hippocampal formation, also exhibit upregulated mGluR5. On the other hand, lower mGluR5 expression was related to increased seizure frequency. In addition to its role in hyperexcitability, mGluR5 upregulation could play a role in counterbalance mechanisms along the hyperexcitable circuitry uniquely altered in sclerotic hippocampal formation. Inefficient post-synaptic compensatory morphological (dendritic branching) and glutamatergic (mGluR5 expression) mechanisms in CA2 subfield could potentially underlie the association of FS with HS and TLE. © 2013 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Ludmyla Kandratavicius
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao PauloBrazil
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill UniversityMontreal, Canada
| | - Pedro Rosa-Neto
- Translational Neuroimaging Laboratory, Department of Neurology and Neurosurgery, Douglas Research Institute, McGill UniversityMontreal, Canada
| | - Mariana Raquel Monteiro
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao PauloBrazil
| | - Marie-Christine Guiot
- Department of Pathology, Montreal Neurological Institute, McGill UniversityMontreal, Canada
| | | | | | - Eliane Kobayashi
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill UniversityMontreal, Canada
| | - Joao Pereira Leite
- Department of Neurosciences and Behavior, Ribeirao Preto Medical School, University of Sao PauloBrazil
- *Correspondence to: Joao Pereira Leite, Ribeirao Preto Medical School, Department of Neurosciences and Behavior, University of Sao Paulo, Av Bandeirantes 3900, 14049-900, Ribeirao Preto, SP, Brazil. E-mail:
| |
Collapse
|
28
|
Valente V, Serafim RB, de Oliveira LC, Adorni FS, Torrieri R, Tirapelli DPDC, Espreafico EM, Oba-Shinjo SM, Marie SKN, Paçó-Larson ML, Carlotti CG. Modulation of HJURP (Holliday Junction-Recognizing Protein) levels is correlated with glioblastoma cells survival. PLoS One 2013; 8:e62200. [PMID: 23638004 PMCID: PMC3636219 DOI: 10.1371/journal.pone.0062200] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Accepted: 03/20/2013] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Diffuse astrocytomas are the most common type of primary brain cancer in adults. They present a wide variation in differentiation and aggressiveness, being classified into three grades: low-grade diffuse astrocytoma (grade II), anaplastic astrocytoma (grade III) and glioblastoma multiforme (grade IV), the most frequent and the major lethal type. Recent studies have highlighted the molecular heterogeneity of astrocytomas and demonstrated that large-scale analysis of gene expression could help in their classification and treatment. In this context, we previously demonstrated that HJURP, a novel protein involved in the repair of DNA double-strand breaks, is highly overexpressed in glioblastoma. METHODOLOGY/PRINCIPAL FINDINGS Here we show that HJURP is remarkably overexpressed in a cohort composed of 40 patients with different grade astrocytomas. We also observed that tumors presenting the higher expression levels of HJURP are associated with poor survival prognosis, indicating HJURP overexpression as an independent prognostic factor of death risk for astrocytoma patients. More importantly, we found that HJURP knockdown strongly affects the maintenance of glioblastoma cells in a selective manner. Glioblastoma cells showed remarkable cell cycle arrest and premature senescence that culminated in elevated levels of cell death, differently from non-tumoral cells that were minimally affected. CONCLUSIONS These data suggest that HJURP has an important role in the maintenance of extremely proliferative cells of high-grade gliomas and point to HJURP as a potential therapeutic target for the development of novel treatments for glioma patients.
Collapse
Affiliation(s)
- Valeria Valente
- Department of Clinical Analysis, Faculty of Pharmaceutical Sciences of Araraquara, University of São Paulo State (UNESP), Araraquara, Brazil.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Peixoto-Santos JE, Galvis-Alonso OY, Velasco TR, Kandratavicius L, Assirati JA, Carlotti CG, Scandiuzzi RC, Serafini LN, Leite JP. Increased metallothionein I/II expression in patients with temporal lobe epilepsy. PLoS One 2012; 7:e44709. [PMID: 23028585 PMCID: PMC3445538 DOI: 10.1371/journal.pone.0044709] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Accepted: 08/07/2012] [Indexed: 12/15/2022] Open
Abstract
In the central nervous system, zinc is released along with glutamate during neurotransmission and, in excess, can promote neuronal death. Experimental studies have shown that metallothioneins I/II (MT-I/II), which chelate free zinc, can affect seizures and reduce neuronal death after status epilepticus. Our aim was to evaluate the expression of MT-I/II in the hippocampus of patients with temporal lobe epilepsy (TLE). Hippocampi from patients with pharmacoresistant mesial temporal lobe epilepsy (MTLE) and patients with TLE associated with tumor or dysplasia (TLE-TD) were evaluated for expression of MT-I/II, for the vesicular zinc levels, and for neuronal, astroglial, and microglial populations. Compared to control cases, MTLE group displayed widespread increase in MT-I/II expression, astrogliosis, microgliosis and reduced neuronal population. In TLE-TD, the same changes were observed, except that were mainly confined to fascia dentata. Increased vesicular zinc was observed only in the inner molecular layer of MTLE patients, when compared to control cases. Correlation and linear regression analyses indicated an association between increased MT-I/II and increased astrogliosis in TLE. MT-I/II levels did not correlate with any clinical variables, but MTLE patients with secondary generalized seizures (SGS) had less MT-I/II than MTLE patients without SGS. In conclusion, MT-I/II expression was increased in hippocampi from TLE patients and our data suggest that it is associated with astrogliosis and may be associated with different seizure spread patterns.
Collapse
Affiliation(s)
- José Eduardo Peixoto-Santos
- Department of Neuroscience and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto – São Paulo, Brazil
| | - Orfa Yineth Galvis-Alonso
- Department of Molecular Biology, São José do Rio Preto Medical School, São José do Rio Preto – São Paulo, Brazil
| | - Tonicarlo Rodrigues Velasco
- Department of Neuroscience and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto – São Paulo, Brazil
| | - Ludmyla Kandratavicius
- Department of Neuroscience and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto – São Paulo, Brazil
| | - João Alberto Assirati
- Department of Neurosurgery, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto – São Paulo, Brazil
| | - Carlos Gilberto Carlotti
- Department of Neurosurgery, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto – São Paulo, Brazil
| | - Renata Caldo Scandiuzzi
- Department of Neuroscience and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto – São Paulo, Brazil
| | - Luciano Neder Serafini
- Department of Pathology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto – São Paulo, Brazil
| | - João Pereira Leite
- Department of Neuroscience and Behavior, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto – São Paulo, Brazil
| |
Collapse
|
30
|
|
31
|
Colli BO, Carlotti CG, Assirati JA, Abud DG, Amato MCM, Dezena RA. Results of microsurgical treatment of paraclinoid carotid aneurysms. Neurosurg Rev 2012; 36:99-114; discussion 114-5. [PMID: 22898891 DOI: 10.1007/s10143-012-0415-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 04/29/2012] [Accepted: 06/16/2012] [Indexed: 10/28/2022]
|
32
|
Kandratavicius L, Hallak JE, Young LT, Assirati JA, Carlotti CG, Leite JP. Differential aberrant sprouting in temporal lobe epilepsy with psychiatric co-morbidities. Psychiatry Res 2012; 195:144-50. [PMID: 21741094 DOI: 10.1016/j.psychres.2011.06.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 01/05/2011] [Accepted: 06/06/2011] [Indexed: 12/26/2022]
Abstract
Psychiatric co-morbidities in epilepsy are common in patients with temporal lobe epilepsy (TLE). Pathological alterations in TLE are well characterised; however, neuropathologic data are relatively scale regarding the association between psychiatric diseases and epilepsy. Our objective was to evaluate the clinical data of 46 adult TLE patients with and without psychiatric co-morbidities and to correlate the data with hippocampal neuronal density and mossy fiber sprouting. Accordingly, patients were grouped as follows: TLE patients without history of psychiatric disorder (TLE, n=16), TLE patients with interictal psychosis (TLE+P, n=14), and TLE patients with major depression (TLE+D, n=16). Hippocampi from autopsies served as non-epileptic controls (n=10). TLE+P exhibited significantly diminished mossy fiber sprouting and decreased neuronal density in the entorhinal cortex when compared with TLE. TLE+P showed significantly poorer results in verbal memory tasks. TLE+D exhibited significantly increased mossy fiber sprouting length when compared with TLE and TLE+P. Further, a higher proportion of TLE+D and TLE+P presented secondarily generalised seizures than did TLE. Our results indicate that TLE patients with psychiatric disorders have distinct features when compared with TLE patients without psychiatric co-morbidities and that these changes may be involved in either the manifestation or the maintenance of psychiatric co-morbidities in epilepsy.
Collapse
Affiliation(s)
- Ludmyla Kandratavicius
- Department of Neurosciences and Behavior, University of Sao Paulo School of Medicine, Ribeirao Preto, Brazil
| | | | | | | | | | | |
Collapse
|
33
|
Borges KS, Castro-Gamero AM, Moreno DA, da Silva Silveira V, Brassesco MS, de Paula Queiroz RG, de Oliveira HF, Carlotti CG, Scrideli CA, Tone LG. Inhibition of Aurora kinases enhances chemosensitivity to temozolomide and causes radiosensitization in glioblastoma cells. J Cancer Res Clin Oncol 2011; 138:405-14. [DOI: 10.1007/s00432-011-1111-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Accepted: 11/28/2011] [Indexed: 10/14/2022]
|
34
|
Tirapelli DPDC, Carlotti CG, Leite JP, Tirapelli LF, Colli BO. Expression of HSP70 in cerebral ischemia and neuroprotetive action of hypothermia and ketoprofen. Arq Neuropsiquiatr 2011; 68:592-6. [PMID: 20730315 DOI: 10.1590/s0004-282x2010000400021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Accepted: 03/10/2010] [Indexed: 11/22/2022]
Abstract
Heat shock proteins (HSPs) are molecular chaperones that bind to other proteins to shepherd them across membranes and direct them to specific locations within a cell. Several injurious stimuli can induce Hsp70 expression, including ischemia. This study aimed to investigate the pattern of expression of protein (immunohistochemistry) and gene (real-time PCR) Hsp70 in experimental focal cerebral ischemia in rats by occlusion of the middle cerebral artery for 1 hour and the role of neuroprotection with hypothermia (H) and ketoprofen (K). The infarct volume was measured using morphometric analysis defined by triphenyl tetrazolium chloride. It was observed increases in the protein (p=0.0001) and gene (p=0.0001) Hsp70 receptor in the ischemic areas that were reduced by H (protein and gene: p<0.05), K (protein: p<0.001), and H+K (protein: p<0.01 and gene: p<0.05). The Hsp70 increases in the ischemic area suggests that the Hsp70-mediated neuroexcitotoxicity plays an important role in cell death and that the neuroprotective effect of both, H and K are directly involved with the Hsp70.
Collapse
|
35
|
Gomes MV, Borges KS, Moreno DA, Queiroz RG, Machado HR, Carlotti CG, Scrideli CA, Tone LG. Abnormal methylation of histone deacetylase genes: implications on etiology and epigenetic therapy of astrocytomas. Anticancer Res 2011; 31:1337-1343. [PMID: 21508384] [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: 05/30/2023]
Abstract
BACKGROUND A growing body of evidence has revealed the involvement of epigenetic alterations in the etiology of astrocytomas. In the present study, we aimed to evaluate the association of DNA methylation of histone deacetylase genes (HDAC) with the etiology of astrocytoma, and the implications for epigenetic therapy. MATERIALS AND METHODS Methylation of the HDAC4, HDAC5 and HDAC6 genes was assessed in 29 tumor samples (astrocytomas grades I, III, and IV) and in the glioblastoma cell lines U87, U251, U343, SF188, and T98G by methylation-specific quantitative PCR (MSED-qPCR). RESULTS Significantly increased methylation of the HDAC5 gene was observed in astrocytomas when compared to non-neoplastic brain samples (p=0.0007) and to glioblastomas cell lines (p=0.001). A heterogenic methylation pattern was evidenced when compared to the glioblastoma cell lines. Distinct effects on methylation and gene expression were observed after in vitro treatment of the different cell lines with decitabine. CONCLUSION Our results suggest that abnormal methylation of HDAC genes is involved in the etiology of astrocytomas and indicate that loci-specific epigenetic interindividualities might be associated to the differential responses to treatment with decitabine.
Collapse
Affiliation(s)
- Marcus Vinicius Gomes
- Centre of Biological and Health Sciences, University of Northern Paraná, PR, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Viaro F, Capellini VK, Celotto AC, Carlotti CG, Rodrigues AJ, Reis GS, dos Santos Augusto V, Evora PRB. Immunohistochemical evaluation of three nitric oxide synthase isoforms in human saphenous vein exposed to different degrees of distension pressures. Cardiovasc Pathol 2010; 19:e211-20. [DOI: 10.1016/j.carpath.2009.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 10/19/2009] [Accepted: 11/11/2009] [Indexed: 10/20/2022] Open
|
37
|
Miranda LEC, Capellini VK, Reis GS, Celotto AC, Carlotti CG, Evora PRB. Effects of partial liver ischemia followed by global liver reperfusion on the remote tissue expression of nitric oxide synthase: lungs and kidneys. Transplant Proc 2010; 42:1557-62. [PMID: 20620474 DOI: 10.1016/j.transproceed.2010.02.097] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2009] [Revised: 01/04/2010] [Accepted: 02/26/2010] [Indexed: 10/19/2022]
Abstract
Hepatic ischemia followed by reperfusion (IR) results in mild to severe remote organ injury. Oxidative stress and nitric oxide (NO) seem to be involved in the IR injury. Our aim was to investigate the effects of liver I/R on hepatic function and lipid peroxidation, leukocyte infiltration and NO synthase (NOS) immunostaining in the lung and the kidney. We randomized 24 male Wistar rats into 3 groups: 1) control; 2) 60 minutes of partial (70%) liver I and 2 hours of global liver R; and 3) 60 minutes of partial (70%) liver I and 6 hours of global liver R. Groups 2 and 3 showed significant increases in plasma alanine and aspartate aminotransferase levels and in tissue malondialdehyde and myeloperoxidase contents. In the kidney, positive endothelial NOS (eNOS) staining was significantly decreased in group 3 compared with group 1. However, staining for inducible NOS (iNOS) and neuronal NOS (nNOS) did not differ among the groups. In the lung, the staining for eNOS and iNOS did not show significant differences among the groups; no positive nNOS staining was observed in any group. These results suggested that partial liver I followed by global liver R induced liver, kidney, and lung injuries characterized by neutrophil sequestration and increased oxidative stress. In addition, we supposed that the reduced NO formation via eNOS may be implicated in the moderate impairment of renal function, observed by others at 24 hours after liver I/R.
Collapse
Affiliation(s)
- L E Correia Miranda
- Department of Surgery and Liver Transplantation, University of Pernambuco, Recife, Pernambuco, Brazil
| | | | | | | | | | | |
Collapse
|
38
|
Oliveira VC, Carrara RCV, Simoes DLC, Saggioro FP, Carlotti CG, Covas DT, Neder L. Sudan Black B treatment reduces autofluorescence and improves resolution of in situ hybridization specific fluorescent signals of brain sections. Histol Histopathol 2010; 25:1017-24. [PMID: 20552552 DOI: 10.14670/hh-25.1017] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interference by autofluorescence is one of the major concerns of immunofluorescence analysis of in situ hybridization-based diagnostic assays. We present a useful technique that reduces autofluorescent background without affecting the tissue integrity or direct immunofluorescence signals in brain sections. Using six different protocols, such as ammonia/ethanol, Sudan Black B (SBB) in 70% ethanol, photobleaching with UV light and different combinations of them in both formalin-fixed paraffin-embedded and frozen human brain tissue sections, we have found that tissue treatment of SBB in a concentration of 0.1% in 70% ethanol is the best approach to reduce/eliminate tissue autofluorescence and background, while preserving the specific fluorescence hybridization signals. This strategy is a feasible, non-time consuming method that provides a reasonable compromise between total reduction of the tissue autofluorescence and maintenance of specific fluorescent labels.
Collapse
Affiliation(s)
- V C Oliveira
- Department of Pathology, Ribeirão Preto School of Medicine - University of São Paulo (USP), Ribeirão Preto - SP, Brazil.
| | | | | | | | | | | | | |
Collapse
|
39
|
Carminati PO, Mello SS, Fachin AL, Junta CM, Sandrin-Garcia P, Carlotti CG, Donadi EA, Passos GAS, Sakamoto-Hojo ET. Alterations in gene expression profiles correlated with cisplatin cytotoxicity in the glioma U343 cell line. Genet Mol Biol 2010; 33:159-68. [PMID: 21637621 PMCID: PMC3036095 DOI: 10.1590/s1415-47572010005000013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [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: 05/20/2009] [Accepted: 08/24/2009] [Indexed: 01/03/2023] Open
Abstract
Gliomas are the most common tumors in the central nervous system, the average survival time of patients with glioblastoma multiforme being about 1 year from diagnosis, in spite of harsh therapy. Aiming to study the transcriptional profiles displayed by glioma cells undergoing cisplatin treatment, gene expression analysis was performed by the cDNA microarray method. Cell survival and apoptosis induction following treatment were also evaluated. Drug concentrations of 12.5 to 300 μM caused a pronounced reduction in cell survival rates five days after treatment, whereas concentrations higher than 25 μM were effective in reducing the survival rates to ~1%. However, the maximum apoptosis frequency was 20.4% for 25 μM cisplatin in cells analyzed at 72 h, indicating that apoptosis is not the only kind of cell death induced by cisplatin. An analysis of gene expression revealed 67 significantly (FDR < 0.05) modulated genes: 29 of which down- and 38 up-regulated. These genes belong to several classes (metabolism, protein localization, cell proliferation, apoptosis, adhesion, stress response, cell cycle and DNA repair) that may represent several affected cell processes under the influence of cisplatin treatment. The expression pattern of three genes (RHOA, LIMK2 and TIMP2) was confirmed by the real time PCR method.
Collapse
|
40
|
Colli BO, Tirapelli DPDC, Carlotti CG, Lopes LDS, Tirapelli LF. Biochemical evaluation of focal non-reperfusion cerebral ischemia by middle cerebral artery occlusion in rats. Arq Neuropsiquiatr 2009; 66:725-30. [PMID: 18949271 DOI: 10.1590/s0004-282x2008000500023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2008] [Accepted: 07/05/2008] [Indexed: 11/21/2022]
Abstract
Cerebral ischemia is an important event in clinical and surgical neurological practice since it is one of the diseases that most compromise the human species. In the present study 40 adult rats were submitted to periods of focal ischemia of 30, 60 and 90 min without reperfusion and animals submitted to a sham procedure were used as controls. We analyzed the levels of ATP, malondialdehyde and caspase-3. No significant differences in the biochemical measurements were observed between the right and left brain hemispheres of the same animal in each experimental group. Reduced ATP levels were observed after the three periods of ischemia compared to the sham group. No significant increase in malondialdehyde or caspase-3 levels was observed. Despite significant changes in ATP levels, the results indicated cell viability in the ischemic region as shown by the low rates of lipid peroxidation and apoptosis, findings probably related to the lack of reperfusion.
Collapse
Affiliation(s)
- Benedicto Oscar Colli
- Department of Surgery and Anatomy, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | | | | | | |
Collapse
|
41
|
Bassi C, Mello SS, Cardoso RS, Godoy PDV, Fachin AL, Junta CM, Sandrin-Garcia P, Carlotti CG, Falcão RP, Donadi EA, Passos GAS, Sakamoto-Hojo ET. Transcriptional changes in U343 MG-a glioblastoma cell line exposed to ionizing radiation. Hum Exp Toxicol 2009; 27:919-29. [PMID: 19273547 DOI: 10.1177/0960327108102045] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Glioblastoma multiforme (GBM) is a highly invasive and radioresistant brain tumor. Aiming to study how glioma cells respond to gamma-rays in terms of biological processes involved in cellular responses, we performed experiments at cellular context and gene expression analysis in U343-MG-a GBM cells irradiated with 1 Gy and collected at 6 h post-irradiation. The survival rate was approximately 61% for 1 Gy and was completely reduced at 16 Gy. By performing the microarray technique, 859 cDNA clones were analyzed. The Significance Analysis of Microarray algorithm indicated 196 significant expressed genes (false discovery rate (FDR) = 0.42%): 67 down-regulated and 97 up-regulated genes, which belong to several classes: metabolism, adhesion/cytoskeleton, signal transduction, cell cycle/apoptosis, membrane transport, DNA repair/DNA damage signaling, transcription factor, intracellular signaling, and RNA processing. Differential expression patterns of five selected genes (HSPA9B, INPP5A, PIP5K1A, FANCG, and TPP2) observed by the microarray analysis were further confirmed by the quantitative real time RT-PCR method, which demonstrated an up-regulation status of those genes. These results indicate a broad spectrum of biological processes (which may reflect the radio-resistance of U343 cells) that were altered in irradiated glioma cells, so as to guarantee cell survival.
Collapse
Affiliation(s)
- Cl Bassi
- Department of Genetics, University of Sao Paulo, SP, Brazil
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Capellini VK, Miranda LEC, Reis GS, Celotto AC, Carlotti CG, Evora PRB. Effects of partial liver ischemia followed by global liver reperfusion on remote organs: lungs and kidneys. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.741.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Verena Kise Capellini
- Department of Surgery and AnatomySchool of Medicine of Ribeirão PretoUniversity of São PauloRibeirão PretoBrazil
| | - Luiz Eduardo Correia Miranda
- Department of Surgery and AnatomySchool of Medicine of Ribeirão PretoUniversity of São PauloRibeirão PretoBrazil
| | - Graziela Saraiva Reis
- Department of Surgery and AnatomySchool of Medicine of Ribeirão PretoUniversity of São PauloRibeirão PretoBrazil
| | - Andrea Carla Celotto
- Department of Surgery and AnatomySchool of Medicine of Ribeirão PretoUniversity of São PauloRibeirão PretoBrazil
| | - Carlos Gilberto Carlotti
- Department of Surgery and AnatomySchool of Medicine of Ribeirão PretoUniversity of São PauloRibeirão PretoBrazil
| | - Paulo Roberto Barbosa Evora
- Department of Surgery and AnatomySchool of Medicine of Ribeirão PretoUniversity of São PauloRibeirão PretoBrazil
| |
Collapse
|
43
|
Viaro F, Carlotti CG, Rodrigues AJ, Vicente WVDA, Bassetto S, Reis GS, Alves L, Evora PRB. Endothelium dysfunction caused by acute pressure distension of human saphenous vein used for myocardial revascularization. Braz J Cardiovasc Surg 2008; 22:169-75. [PMID: 17992321 DOI: 10.1590/s0102-76382007000200004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2007] [Accepted: 05/30/2007] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To study morphofunctional alterations induced by brief pressure increases in human saphenous veins utilized in coronary artery bypass grafting. METHOD Saphenous veins of 20 patients undergoing coronary artery bypass grafting, were distributed into four experimental groups, control, 100 mmHg, 200 mmHg and 300 mmHg, and submitted to pressure distention over 15 seconds using Krebs solution. The evaluation included CD34 immunohistochemistry and an In vitro vascular reactivity study in organ chambers. RESULTS The main experimental findings were 1) From pressures of 200 mmHg there was a tendency to reduce the CD34 expression which became statistically significant at 300 mmHg; 2) There was no impairment of the contraction and relaxation as evidenced by in vitro vascular reactivity tests. CONCLUSION Although vascular reactivity impairment was not demonstrated in vitro, the CD34 expression, measured by immunohistochemistry, shows there is endothelium dysfunction at pressures of 300 mmHg.
Collapse
Affiliation(s)
- Fernanda Viaro
- Function Endothelial Laboratory of the Experimental Surgery Section in the Surgery and Anatomy, Department of the Medicine School in Ribeirão Preto, University ofSão Paulo
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Colli BO, Assirati JA, Deriggi DJP, Neder L, dos Santos AC, Carlotti CG. Tentorial meningiomas: follow-up review. Neurosurg Rev 2008; 31:421-30; discussion 430. [DOI: 10.1007/s10143-008-0141-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2007] [Revised: 01/09/2008] [Accepted: 01/22/2008] [Indexed: 11/28/2022]
|
45
|
Andrade-Valença LPA, Valença MM, Velasco TR, Carlotti CG, Assirati JA, Galvis-Alonso OY, Neder L, Cendes F, Leite JP. Mesial temporal lobe epilepsy: clinical and neuropathologic findings of familial and sporadic forms. Epilepsia 2008; 49:1046-54. [PMID: 18294201 DOI: 10.1111/j.1528-1167.2008.01551.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
PURPOSE To evaluate the clinical and hippocampal histological features of patients with mesial temporal lobe epilepsy (MTLE) in both familial (FMTLE) and sporadic (SMTLE) forms. METHODS Patients with FMTLE (n = 20) and SMTLE (n = 39) who underwent surgical treatment for refractory seizures were studied at the University of São Paulo School of Medicine at Ribeirão Preto. FMTLE was defined when at least two individuals in a family had clinical diagnosis of MTLE. Hippocampi from all patients were processed for Nissl/HE and Timm's stainings. Both groups were compared for clinical variables, hippocampal cell densities, and intensity of supragranular mossy fiber staining. RESULTS There were no significant differences between FMTLE and SMTLE groups in the following: age at the surgery, age of first usual epileptic seizure, history of initial precipitating injury (IPI), age of IPI, latent period, ictal and interictal video-EEG patterns, presence of hippocampal atrophy and signal changes at MRI, and postoperative outcome. In addition, no differences were found in cell densities in hippocampal cornu ammonis subfields (CA1, CA2, CA3, CA4), fascia dentata, polymorphic region, subiculum, prosubiculum, and presubiculum. However, patients with SMTLE had greater intensity of mossy fiber Timm's staining in the fascia dentata-inner molecular layer (p< 0.05). DISCUSSION Patients with intractable FMTLE present a clinical profile and most histological findings comparable to patients with SMTLE. Interestingly, mossy fiber sprouting was less pronounced in patients with FMTLE, suggesting that, when compared to SMTLE, patients with FMTLE respond differently to plastic changes plausibly induced by cell loss, neuronal deafferentation, or epileptic seizures.
Collapse
|
46
|
Lobão-Soares B, Walz R, Carlotti CG, Sakamoto AC, Calvo F, Terzian ALB, da Silva JA, Wichert-Ana L, Coimbra NC, Bianchin MM. Cellular prion protein regulates the motor behaviour performance and anxiety-induced responses in genetically modified mice. Behav Brain Res 2007; 183:87-94. [PMID: 17618696 DOI: 10.1016/j.bbr.2007.05.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Revised: 05/17/2007] [Accepted: 05/23/2007] [Indexed: 10/23/2022]
Abstract
The cellular prion protein (PrP(C)) is a sialoglycoprotein involved in neuroplasticity processes and synaptic transmission. This study investigated behavioural responses (balance in the rota-rod test at 24 rpm, motility in the open-field test, anxiety in the elevated plus-maze test) in Zurich developed wild-type adult mice (WT, controls of normal PrP(C) expression), in knockout (KO) mice (Prnp(0/0), with no PrP(C) expression), and in PrP(C) overexpressing Tg-20 mice. After 8 min in the rota-rod test, Tg-20 animals presented significantly fewer falls (1.08+/-1.56 falls) than both WT (7.27+/-4.36) and KO (7.6+/-6.15) mice (p<0.01). In the open field test, Tg-20 animals showed significantly increased motility [rearing=23.4+/-7.85, crossing=97.30+/-32.11) when compared with KO mice (rearing=5.45+/-3.69 and crossing=59.73+/-15.43) or WT mice (rearing=6.5+/-20.23 and crossing=45.18+/-20.33) (p<0.01). In the elevated plus-maze test, Tg-20 mice showed less anxiety (head projections=7.3+/-1.62) when compared with WT animals (3.38+/-0.67) (p<0.05). Moreover, KO mice spent more time in the centre of the plus maze (37.80+/-5.57 s) than did WT mice (22.57+/-3.82) (p<0.05). PrP(C) overexpressing mice evoked increased motility, less anxiety, and increased equilibrium when compared with WT control animals in the behavioural protocols used. KO animals also tended to evoke fewer anxiety-related responses in the elevated plus-maze test. These findings indicate that the levels of PrP(C) in adult life are associated with possible changes in motility, anxiety, and equilibrium.
Collapse
Affiliation(s)
- Bruno Lobão-Soares
- Laboratório de Neuroanatomia & Neuropsicobiologia, Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (USP), Av. dos Bandeirantes, 3900, Ribeirão Preto, SP 14049-900, Brasil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Colli BO, Carlotti CG, Assirati JA, Lopes LDS, Marques W, Chimelli L, Neder L, Barreira AA. Dorsal root ganglionectomy for the diagnosis of sensory neuropathies. Surgical technique and results. ACTA ACUST UNITED AC 2007; 69:266-73; dicussion 273. [PMID: 17597195 DOI: 10.1016/j.surneu.2007.01.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2006] [Accepted: 01/11/2007] [Indexed: 11/15/2022]
Abstract
BACKGROUND Inflammatory diseases stand out among sensory neuronopathies because, in their active phase, they can be treated with immunosuppressive agents. Immunosuppressive therapy may present severe adverse effects and requires previous inflammatory activity confirmation. Sensory neuronopathies are diagnosed based on clinical and EMG findings. Diagnostic confirmation and identification of inflammatory activity are based on sensory ganglion histopathological examination. We describe the surgical technique used for dorsal root ganglionectomy in patients with clinical/EMG diagnosis of sensory neuronopathies. METHODS The sensory ganglion was obtained from 15 patients through a small T7-T8 hemilaminectomy and foraminotomy to expose the C7 root from its origin to the spinal nerve bifurcation. In 6 patients, the dural cuff supposed to contain the ganglion was resected en bloc; and in 9 patients, the ganglion was obtained through a longitudinal incision of the dural cuff and microsurgical dissection from the ventral and dorsal roots and radicular arteries. All ganglia were histopathologically examined. RESULTS No ganglion was found in the dural cuff in 2 patients submitted to en bloc removal, and the ganglion was removed in all patients who underwent microsurgical dissection. All but 2 patients that had ganglion examination presented a neuronopathy of nerve cell loss, 3 with mononuclear inflammatory infiltrate. These patients underwent immunosuppressive therapy, and 2 of them presented clinical improvement. No surgical complications were observed. CONCLUSIONS Microsurgical dorsal root ganglionectomy for diagnosing inflammatory sensory ganglionopathies was effective and safe. Although safe, en bloc resection of the proximal dural cuff was not effective for this purpose.
Collapse
Affiliation(s)
- Benedicto Oscar Colli
- Division of Neurosurgery, Department of Surgery, Ribeirão Preto Medical School, University of São Paolo, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Colli BO, Carlotti CG, Assirati JA, dos Santos MBM, Neder L, dos Santos AC. Parasagittal meningiomas: follow-up review. ACTA ACUST UNITED AC 2006; 66 Suppl 3:S20-7; discussion S27-8. [DOI: 10.1016/j.surneu.2006.08.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2006] [Accepted: 08/02/2006] [Indexed: 12/01/2022]
|
49
|
Velasco TR, Zanello PA, Dalmagro CL, Araújo D, Santos AC, Bianchin MM, Alexandre V, Walz R, Assirati JA, Carlotti CG, Takayanagui OM, Sakamoto AC, Leite JP. Calcified cysticercotic lesions and intractable epilepsy: a cross sectional study of 512 patients. J Neurol Neurosurg Psychiatry 2006; 77:485-8. [PMID: 16543527 PMCID: PMC2077509 DOI: 10.1136/jnnp.2005.078675] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [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] [Indexed: 11/04/2022]
Abstract
BACKGROUND Neurocysticercosis is a major cause of epilepsy in developing countries and is endemic in Brazil. To test the hypothesis that the aetiological profile of patients with intractable epilepsy in Brazil includes neurocysticercosis, we conducted a cross sectional study investigating the aetiology of intractable epilepsy. METHODS A total of 512 patients evaluated at the outpatient clinic for intractable epilepsy at the Ribeirão Preto School of Medicine were included in the survey. Medical intractability was determined on the basis of seizure incidence and severity, and response to appropriate epilepsy management. Neuroimaging included brain CT with non-contrasted and contrasted phases and high resolution MRI. Patients were divided into neurocysticercosis and non-neurocysticercosis groups according to previous diagnostic criteria. RESULTS The most common epileptogenic lesions were mesial temporal sclerosis (MTS; 56.0%), malformations of cortical development (12.1%), and brain tumours (9.9%). Neuroimaging was normal in 8.7% of patients. Calcifications were found in 27% of patients and were significantly more common in patients with MTS than in those without MTS (p<0.001). Isolated neurocysticercosis was found in only eight patients (1.56%). CONCLUSIONS These data suggest that neurocysticercosis is an uncommon cause of intractable epilepsy, even in an endemic region such as Brazil, and that it may only represent a coexistent pathology. However, an analysis of our findings reveals that neurocysticercosis was more common in patients with MTS. This finding could suggest either that there is a cause-effect relationship between MTS and neurocysticercosis, or that MTS and neurocysticercosis co-vary with a missing variable, such as socio-economic status.
Collapse
Affiliation(s)
- T R Velasco
- CIREP, Centro de Cirurgia de Epilepsia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo 14.048-900, SP, Brazil.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Colli BO, Carlotti CG, Assirati JA, Marques W. Neurogenic thoracic outlet syndromes: a comparison of true and nonspecific syndromes after surgical treatment. ACTA ACUST UNITED AC 2006; 65:262-71; discussion 271-2. [PMID: 16488246 DOI: 10.1016/j.surneu.2005.06.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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: 01/06/2005] [Accepted: 06/27/2005] [Indexed: 10/25/2022]
Abstract
BACKGROUND Neurogenic thoracic outlet syndrome (NTOS) is attributed to compression of the brachial plexus at the scalene hiatus. Patients with true NTOS (TNTOS) have typical clinical and electrophysiological changes and are considered to respond well to surgical treatment, but patients with nonspecific NTOS (NNTOS) have predominantly sensory signs, not well-defined electrophysiological changes, and are thought not to respond favorably to surgical treatment. The postsurgical outcome of patients with cervicobrachialgia diagnosed as TNTOS and as NNTOS is analyzed. METHODS Seven patients with typical electrophysiological features of TNTOS and 11 with nonspecific signs (NNTOS--extraspinal compression of C5-T1) were treated from 1986 to 2001. Age, duration of symptoms, and follow-up were similar in both groups. All patients underwent unilateral (14) or bilateral (4) supraclavicular decompression of the brachial plexus, for a total of 22 procedures. Clinical outcome was evaluated based on sensory and motor signs and on functional capacity. The Mann-Whitney U test and Fisher exact test were used to compare demographic data and proportions, respectively. RESULTS Improvement of pain/paresthesias, sensory loss, atrophy, and muscular weakness after surgery was similar in the two groups. Regarding functional capacity, 57.1% of patients with TNTOS and 63.6% of patients with NNTOS became normal or reacquired their previous condition with slight limitation. Surgery-related complications were paresthesias and paresis in the arm, sympathetic dystrophy, pneumothorax, and lymphatic collections, all in patients with NNTOS. CONCLUSIONS Patients with NNTOS with electrophysiological signs of extraspinal radicular impairment had the same chances of improvement after surgical treatment as patients with TNTOS.
Collapse
Affiliation(s)
- Benedicto Oscar Colli
- Division of Neurosurgery, Department of Surgery, Hospital das Clinicas, Ribeirão Preto Medical School, University of São Paulo, Brazil.
| | | | | | | |
Collapse
|