Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 9 de 9
Filter
1.
Arq. neuropsiquiatr ; 79(8): 705-715, Aug. 2021. tab, graf
Article in English | LILACS | ID: biblio-1339228

ABSTRACT

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.


RESUMO Antecedentes: Meningiomas são os tumores mais frequentes do sistema nervoso central (SNC). Suas características étnicas e geográficas precisam ser conhecidas para o seu tratamento racional. Objetivo: Investigar aspectos clínicos e epidemiológicos de uma série de pacientes com meningiomas. Métodos: Análise retrospectiva demográfica de 993 pacientes com meningiomas (768 operados e 225 tratados conservadoramente) Resultados: Meningiomas constituíram 43.8% dos tumores primários do SNC. 0.8% deles eram múltiplos (14,7% com neurofibromatose 2) e 0,6% eram radioinduzidos. A idade média e o índice mulheres/homens foram respectivamente 53,0 e 63,9 anos e 3.2:1 e 6.3:1 para pacientes operados e não operados. O diagnóstico foi mais tardio em mulheres. Ocorreram picos de incidências na 6ª e na 7ª décadas respectivamente para pacientes operados e não operados. A incidência foi menor na infância e maior após 70 anos. Meningiomas predominaram no crânio (96.5%), a maioria grau I da OMS, subtipo transicional. Do total, 3.5% ocorreram no canal raquídeo, principalmente na região torácica, todos grau I, a maioria transicional. Em relação à distribuição racial, 1.0% dos meningiomas ocorreu em amarelos, 87% em brancos e 12% em negros. As taxas de sobrevida sem recorrência foram 83.4% e 51.6% em 10 e 20 anos e a mortalidade operatória foi 3%. Conclusões: A maioria dos dados demográficos observados foi similar aos de outros centros ocidentais. As diferenças observadas foram maior incidência, predominância em mulheres e idosos nos pacientes não operados e em caucasianos, e maior associação com neurofibromatose 2.


Subject(s)
Humans , Male , Female , Neurofibromatosis 2 , Meningeal Neoplasms/epidemiology , Meningioma/epidemiology , Retrospective Studies , Middle Aged , Neoplasm Recurrence, Local
2.
Int. j. morphol ; 38(3): 523-529, June 2020. graf
Article in English | LILACS | ID: biblio-1098282

ABSTRACT

This study aimed to investigate the morphometric and the pattern of protein and gene expression related to the extrinsic apoptotic pathway in experimental focal cerebral ischemia and the hole of neuroprotection with hypothermia and ketoprofen. For this analysis, 120 rats were randomly divided into 3 groups (20 animals each): control - no surgery (20 animals); sham - simulation of surgery (20 animals); ischemic - focal ischemia for 1 hour, without reperfusion (80 animals) and divided into four subgroups with 20 animals each: ischemic + intraischemic hypothermia; ischemic + previous intravenous ketoprofen, and ischemic + hypothermia and ketoprofen. The infarct volume was measured using morphometric analysis of infarct areas defined by triphenyl tetrazolium chloride and the patterns of expression of the apoptosis genes (Fas, c-Flip, caspase-8 and caspase-3) and the apoptosis protein caspase-3 were evaluated by quantitative real-time PCR and immunohistochemistry, respectively. Hypo expression of genes of extrinsic pathway of apoptosis was observed: Fas receptor, c-Flip and caspase-8 in the ischemics areas. Increases in the gene and protein caspase-3 in the ischemic areas were also observed, and these increases were reduced by hypothermia and ketoprofen, also noted in the morphometric study. The caspases-3 increase suggests that this gene plays an important role in apoptosis, probably culminating in cell death and that the neuroprotective effect of hypothermia and ketoprofen is involved.


Este estudio tuvo como objetivo investigar la morfometría y el patrón de expresión de proteínas y genes relacionados con la vía apoptótica extrínseca en la isquemia cerebral focal experimental y el agujero de neuroprotección con hipotermia y ketoprofeno. Se dividieron aleatoriamente 120 ratas en 3 grupos (20 animales cada uno): control - sin cirugía (20 animales); simulación - simulación de cirugía (20 animales); isquemia isquemia focal durante 1 hora, sin reperfusión (80 animales) y dividida en cuatro subgrupos con 20 animales cada uno: isquemia + hipotermia intraisquémica; isquemia + ketoprofeno intravenoso previo, e isquemia + hipotermia y ketoprofeno. El volumen del infarto se midió utilizando un análisis morfométrico de áreas de infarto definidas por cloruro de trifenil tetrazolio y los patrones de expresión de los genes de apoptosis (Fas, c-Flip, caspase-8 y caspase-3) y la proteína de apoptosis caspase-3 fueron evaluados por PCR cuantitativa en tiempo real e inmunohistoquímica, respectivamente. Se observó hipoexpresión de genes de la vía extrínseca de la apoptosis: receptor Fas, c-Flip y caspasa-8 en las áreas isquémicas. También se observaron aumentos en el gen y la proteína caspasa-3 en las áreas isquémicas y estos aumentos se redujeron por hipotermia y ketoprofeno, también observado por estudio morfométrico. El aumento de caspasas-3 sugiere que este gen tiene un papel importante en la apoptosis, y probable causa de muerte celular, involucrando el efecto neuroprotector de la hipotermia y el ketoprofeno.


Subject(s)
Animals , Rats , Brain Ischemia/genetics , Brain Ischemia/metabolism , Immunohistochemistry , Brain Ischemia/pathology , Brain Ischemia/therapy , Ketoprofen/pharmacology , Apoptosis/genetics , Neuroprotective Agents/pharmacology , Disease Models, Animal , Caspase 3/genetics , Caspase 8/genetics , Real-Time Polymerase Chain Reaction , Hypothermia, Induced
3.
Int. j. morphol ; 38(3): 616-621, June 2020. graf
Article in English | LILACS | ID: biblio-1098296

ABSTRACT

The chronic consumption of alcohol causes a worsening of the events that follow the cerebral ischemia. These events are regulated through the expression of several genes and microRNAs. The aimof this work was To analyze and describe the expression profile of PARP and AIF and miRNA-9 proteins in rats submitted to focal cerebral ischemia, associated or not with chronic alcoholism model. Methods: Twenty adult Wistar rats, subdivided into: control; ischemic; alcoholic and ischemic / alcoholized for immunohistochemical analysis and miRNA-9 gene expression. Results: There was a reduction in the protein expression of PARP-1 and a positive marking for AIF in the ischemic / alcoholized group. The miRNA-9 did not obtain significant expression. The association of ischemia with chronic alcohol use promoted a tendency to low expression of miRNA-9, low expression of PARP-1 and high expression of AIF, indicating an interference in the protective effect of miRNA-9 be observed in the other groups.


El consumo crónico de alcohol provoca un empeoramiento de los eventos que siguen a la isquemia cerebral. Estos eventos están regulados a través de la expresión de varios genes y microRNA. El objetivo de este trabajo fue analizar y describir el perfil de expresión de las proteínas PARP y AIF y microRNA-9 en ratas sometidas a isquemia cerebral focal, asociadas o no, con el modelo de alcoholismo crónico. Veinte ratas Wistar adultas se dividieron en: grupo control, isquémico alcohólico, e isquémico / alcoholizado para análisis inmunohistoquímico y expresión de genes microRNA-9. Resultados: Hubo una reducción en la expresión de proteínas de PARP-1 y un marcado positivo para AIF en el grupo isquémico / alcoholizado. No se observó una expresión significativa en el microRNA-9. La asociación de la isquemia con el consumo crónico de alcohol promovió una tendencia a la baja expresión de microRNA-9, baja expresión de PARP1 y alta expresión de AIF, lo que indica una interferencia en el efecto protector de microRNA-9 en los otros grupos.


Subject(s)
Animals , Rats , Brain Ischemia/metabolism , Alcoholism/metabolism , Immunohistochemistry , Brain Ischemia/genetics , Rats, Wistar , MicroRNAs/metabolism , Disease Models, Animal , Alcoholism/genetics , Apoptosis Inducing Factor/metabolism , Poly (ADP-Ribose) Polymerase-1/metabolism
4.
Arq. neuropsiquiatr ; 77(10): 689-695, Oct. 2019. graf
Article in English | LILACS | ID: biblio-1038728

ABSTRACT

ABSTRACT 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.


RESUMO O objetivo deste estudo foi analisar o cerebelo de ratos submetidos à isquemia cerebral focal experimental, por oclusão da artéria cerebral média por 90 minutos, seguida de reperfusão por 48 horas, associada a um modelo de alcoolismo. Métodos Foram utilizados 50 ratos Wistar adultos, subdivididos em cinco grupos experimentais: grupo controle (C): animais submetidos apenas à anestesia; grupo sham (S): animais submetidos à simulação completa do procedimento cirúrgico; grupo isquêmico (I): animais submetidos à isquemia cerebral focal por 90 minutos, seguidos de reperfusão por 48 horas; grupo alcoólico (A): animais que receberam etanol absoluto diário diluído em 20% em água por quatro semanas; e grupo isquêmico e alcoólico (I + A): animais que recebem o mesmo tratamento do grupo A e, após quatro semanas, submetidos à isquemia cerebral focal por 90 minutos, seguidos de reperfusão por 48 horas. As amostras de cerebelo foram coletadas e a análise imuno-histoquímica da proteína Caspase-9 e a análise sérica por RT-PCR dos microRNAs miR-21, miR-126 e miR155 foram realizadas. Resultados A expressão de Caspase-9 foi maior nos grupos I, A e I + A. Nas análises de microRNAs, o miR-126 foi maior nos grupos A e I + A, o miR-155 foi maior nos grupos I e I + A. Conclusões Concluímos que a apoptose ocorre no córtex cerebelar, mesmo distante do foco isquêmico, e que os microRNAs 126 e 155 mostram uma correlação com a apoptose celular em ratos isquêmicos e submetidos ao modelo crônico de álcool.


Subject(s)
Animals , Male , Cerebellum/pathology , Brain Ischemia/pathology , Apoptosis , MicroRNAs/blood , Alcoholism/pathology , Caspase 9/analysis , Time Factors , Immunohistochemistry , Reperfusion Injury/pathology , Random Allocation , Cerebellum/chemistry , Brain Ischemia/blood , Rats, Wistar , Infarction, Middle Cerebral Artery , Alcoholism/blood , Real-Time Polymerase Chain Reaction
5.
Acta cir. bras ; 33(8): 652-663, Aug. 2018. graf
Article in English | LILACS | ID: biblio-949377

ABSTRACT

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.


Subject(s)
Animals , Male , Ischemic Attack, Transient/pathology , Alcoholism/pathology , Inhibitor of Apoptosis Proteins/analysis , Caspase 3/analysis , Time Factors , Immunohistochemistry , Reperfusion Injury/metabolism , Reperfusion Injury/pathology , Random Allocation , Ischemic Attack, Transient/metabolism , Rats, Wistar , Apoptosis , Middle Cerebral Artery , Microscopy, Electron, Transmission , Alcoholism/metabolism , Edema , Electromyography/methods , Mitochondria/pathology
6.
Arq. neuropsiquiatr ; 75(12): 875-880, Dec. 2017. graf
Article in English | LILACS | ID: biblio-888280

ABSTRACT

ABSTRACT Glioblastoma (GBM) is the most malignant glioma and represents 29% of all brain tumors. Tumorigenesis is intimately connected with characteristics acquired in the physiologic pathway of cellular death. Objective: In the present study, the expression of anti-apoptotic (XIAP and Bcl-2) and apoptotic (cytochrome C, caspase 9, APAF-1), caspase 3 and the Smac/DIABLO genes related to the apoptosis pathway were evaluated in 30 samples of glioblastoma. Methods: The gene expression was evaluated in 30 glioblastomas (WHO grade IV) and compared to 10 white matter control samples with real-time PCR. Results and Conclusion: There were higher expressions of XIAP (p = 0.0032) and Bcl-2 (p = 0.0351) in the glioblastoma samples compared to the control samples of normal brain. These results raise the question of whether Bcl-2 and XIAP genes can be responsible for the inhibition of programmed cell death in glioblastomas. Moreover, they provide additional information capable of allowing the development of new target therapy strategies.


RESUMO O glioblastoma (GBM) é o glioma mais maligno e representa 29% de todos os tumores cerebrais. A tumorigênese está intimamente ligada à características adquiridas na via fisiológica de morte celular. Objetivo: Avaliar a expressão de genes anti-apoptóticos (XIAP e Bcl-2) e apoptóticos (citocromo C, a caspase 9, APAF-1), caspase 3 e SMAC/DIABLO, relacionados à apoptose, em 30 amostras de tecido de pacientes com glioblastoma. Métodos: A expressão gênica foi avaliada em trinta glioblastomas e comparada a dez amostras controles de substância branca por PCR em tempo real. Resultados e Conclusão: Houve maior nível de expressão de XIAP (p = 0,0032) e Bcl-2 (p = 0,0351) em comparação com as amostras controle, de cérebro normal. Estes resultados levantam a questão de que os genes Bcl-2 e XIAP podem ser responsáveis pela inibição da morte celular programada em glioblastomas, além disso, proporcionam informação adicional capaz de permitir o desenvolvimento de novas estratégias de terapia alvo.


Subject(s)
Humans , Male , Female , Middle Aged , Brain Neoplasms/metabolism , Gene Expression Regulation, Neoplastic , Apoptosis , Glioblastoma/metabolism , Proto-Oncogene Proteins c-bcl-2/metabolism , X-Linked Inhibitor of Apoptosis Protein/metabolism , Brain Neoplasms/genetics , Brain Neoplasms/pathology , Glioblastoma/genetics , Glioblastoma/pathology , Proto-Oncogene Proteins c-bcl-2/genetics , Cell Line, Tumor , X-Linked Inhibitor of Apoptosis Protein/genetics , Real-Time Polymerase Chain Reaction
7.
Arq. neuropsiquiatr ; 75(4): 209-215, Apr. 2017. graf
Article in English | LILACS | ID: biblio-838890

ABSTRACT

ABSTRACT One of the different genetic mechanisms involved in the carcinogenesis of meningiomas is influenced by interactions between proteins that induce and inhibit apoptosis. Objective To evaluate the expression of c-FLIP, XIAP, Bcl-2, caspase 3, 8 and 9, cytochrome c, APAF 1 and Smac/DIABLO genes related to apoptosis pathways. Methods The gene expression was evaluated in 30 meningiomas (WHO grades I and II) and in 10 normal samples (from arachnoid tissue) through PCR-RT. Results The results showed higher expression of anti-apoptotic genes in meningiomas when compared to the control group, which had a low expression of pro-apoptotic genes. Conclusion There is a possible block in the activation of caspases through the intrinsic apoptosis pathway in meningiomas. c-FLIP modulates caspase 8 and, by inhibiting its activation due to the lack of connection with the receiver, there is a block to the FAS activation of apoptosis by its extrinsic pathway.


RESUMO Um dos diferentes mecanismos genéticos envolvidos na carcinogênese de meningiomas é influenciado por interações entre proteínas que induzem e inibem a apoptose. Objetivos Avaliar a expressão de c-FLIP, XIAP, Bcl-2, caspase 3, 8 e 9, citocromo C, APAF 1 e Smac/DIABLO, genes relacionados com as vias da apoptose. Métodos A expressão gênica foi avaliada em trinta amostras de meningiomas (OMS grau I e II) e em dez amostras normais (de aracnóide) por PCR em tempo real. Resultados Os resultados mostraram maior expressão de genes antiapoptóticos em meningiomas quando comparados com controle, em contraste com a menor expressão de genes próapoptóticos. Conclusão Há um possível bloqueio na ativação de caspases através da via intrínseca da apoptose em meningiomas. O c-FLIP modula a caspase 8 e, desse modo, inibindo a sua ativação pela ausência de ligação com o receptor, há um bloqueio na ativação de FAS pela via extrínseca da apoptose.


Subject(s)
Humans , Adult , Gene Expression Regulation, Neoplastic/genetics , Apoptosis Regulatory Proteins/genetics , Meningioma/genetics , RNA, Neoplasm/genetics , Polymerase Chain Reaction , Neoplasm Grading
8.
Arq. neuropsiquiatr ; 75(1): 30-35, Jan. 2017. graf
Article in English | LILACS | ID: biblio-838854

ABSTRACT

ABSTRACT Alcohol consumption aggravates injuries caused by ischemia. Many molecular mechanisms are involved in the pathophysiology of cerebral ischemia, including neurotransmitter expression, which is regulated by microRNAs. Objective: To evaluate the microRNA-219 and NMDA expression in brain tissue and blood of animals subjected to cerebral ischemia associated with alcoholism. Methods: Fifty Wistar rats were divided into groups: control, sham, ischemic, alcoholic, and ischemic plus alcoholic. The expression of microRNA-219 and NMDA were analyzed by real-time PCR. Results: When compared to the control group, the microRNA-219 in brain tissue was less expressed in the ischemic, alcoholic, and ischemic plus alcoholic groups. In the blood, this microRNA had lower expression in alcoholic and ischemic plus alcoholic groups. In the brain tissue the NMDA gene expression was greater in the ischemic, alcoholic, and ischemic plus alcoholic groups. Conclusion: A possible modulation of NMDA by microRNA-219 was observed with an inverse correlation between them.


RESUMO Algumas condições podem agravar os danos causados pelo processo isquêmico, tais como o consumo de álcool, e diversos mecanismos moleculares que estão envolvidos na fisiopatologia da isquemia cerebral, incluindo a expressão de neurotransmissores, e estes podem estar regulados por microRNAs. Objetivo: Avaliar a expressão de NMDA e do microRNA-219 no tecido cerebral e no sangue de animais submetidos à isquemia cerebral associada ao alcoolismo. Métodos: 50 ratos Wistar foram divididos em: controle, sham, isquêmico, alcoólico e isquêmico mais alcoólico. A expressão de microRNA-219 e de NMDA foram analisadas por PCR em tempo real. Resultados: Quando comparado com o grupo controle, o microRNA-219 no tecido cerebral foi menos expresso nos grupos isquêmico, alcoólico e associado. No sangue, este microRNA teve menor expressão no grupo alcoólico e no associado. Em relação à expressão do gene do NMDA, em tecido cerebral foi maior nos grupos isquêmico, alcoólico e no associado. Conclusão: Uma possível modulação de NMDA pelo microRNA-219 foi observada, com uma correlação inversa entre eles.


Subject(s)
Animals , Male , Rats , Brain Ischemia/metabolism , Receptors, N-Methyl-D-Aspartate/metabolism , MicroRNAs/metabolism , Alcoholism/complications , Immunohistochemistry , Brain Ischemia/etiology , Rats, Wistar , Disease Models, Animal
9.
J. bras. psiquiatr ; 63(1): 33-38, Jan-Mar/2014. tab
Article in Portuguese | LILACS-Express | LILACS | ID: lil-709778

ABSTRACT

Objetivo: Avaliar a qualidade de vida e sintomas de ansiedade e depressão em pacientes com diagnóstico de meningioma e glioma de alto grau submetidos à neurocirurgia oncológica. Métodos: Para a coleta de dados, foram aplicados dois instrumentos validados no Brasil: Hospital Anxiety and Depression Scale (HAD) e Item Short-Form Health Survey (SF-36). Resultados: Foram identificadas diferenças estatisticamente significativas quando comparados os dados do SF-36 de ambos os grupos tumorais, no pré e pós-operatório, nos aspectos: capacidade funcional (p = 0,043), aspecto emocional (p = 0,042) e saúde mental (p = 0,042) referente ao grupo meningioma. Quando comparados com respectivos grupos controle, houve diferenças significativas entre os grupos meningioma e controle, nos aspectos físico (p = 0,002) e emocional (p = 0,004), e entre os grupos glioma de alto grau e controle, nos aspectos capacidade funcional (p = 0,003) e físico (p = 0,003). Conclusão: A cirurgia oncológica gerou alterações de humor e na qualidade de vida em ambos os grupos, independente do tipo histológico do tumor. Apesar da relevância do tema, ainda são poucos os estudos sobre o tema. .


Objective: To evaluate the quality of life, symptoms of anxiety and depression in patients with meningioma and high-grade glioma undergoing oncologic neurosurgery. Methods: Anxiety and Depression Scale (HADS) and Item Short-Form Health Survey (SF-36) Hospital were both applied to collect data. Results: Statistically significant differences were found when comparing the data from the SF-36 in both tumor groups. For the first group (meningioma), the preoperative and postoperative results were: physical functioning (p = 0.043), mental, emotional (p = 0.042) and health (p = 0.042). There were significant differences between the first group (meningioma) and the second group (control groups) in emotional (p = 0.004), physical (p = 0.002) and between the groups of high-grade glioma and control aspects in functional capacity (p = 0.003) and physical capacity (p = 0.003). Conclusion: It was concluded that cancer surgery caused changes in psychological mood and quality of life in both groups, regardless of histological diagnosis type of the tumor and, despite the relevance of the topic, still there are few studies on the topic. .

SELECTION OF CITATIONS
SEARCH DETAIL