Consulta: subjectFacets:"Glioblastoma"
Registros recuperados: 9
Data/hora: 06/06/2024 04:25:52

Antiproliferative effects of Tubi-bee propolis in glioblastoma cell lines
Provedor de dados: 74
Autores: Borges,Kleiton Silva; Brassesco,María Sol; Scrideli,Carlos Alberto; Soares,Ademilson Espencer Egea; Tone,Luiz Gonzaga.
Propolis is a resin formed by a complex chemical composition of substances that bees collect from plants. Since ancient times, propolis has been used in folk medicine, due to its biological properties, that include antimicrobial, anti-inflammatory, antitumoral and immunomodulatory activities. Glioblastoma is the most common human brain tumor. Despite the improvements in GBM standard treatment, patients' prognosis is still very poor. The aim of this work was to evaluate in vitro the Tubi-bee propolis effects on human glioblastoma (U251 and U343) and fibroblast (MRC-5) cell lines. Proliferation, clonogenic capacity and apoptosis were analyzed after treatment with 1 mg/mL and 2 mg/mL propolis concentrations for different time periods. Additionally,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glioblastoma; Propolis; Temozolomide; U251; U343.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200024

DNA repair genes in astrocytoma tumorigenesis, progression and therapy resistance
Provedor de dados: 74
Autores: Sousa,Juliana Ferreira de; Serafim,Rodolfo Bortolozo; Freitas,Laura Marise de; Fontana,Carla Raquel; Valente,Valeria.
Abstract Glioblastoma (GBM) is the most common and malignant type of primary brain tumor, showing rapid development and resistance to therapies. On average, patients survive 14.6 months after diagnosis and less than 5% survive five years or more. Several pieces of evidence have suggested that the DNA damage signaling and repair activities are directly correlated with GBM phenotype and exhibit opposite functions in cancer establishment and progression. The functions of these pathways appear to present a dual role in tumorigenesis and cancer progression. Activation and/or overexpression of ATRX, ATM and RAD51 genes were extensively characterized as barriers for GBM initiation, but paradoxically the exacerbated activity of these genes was further associated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glioblastoma; DNA repair; Biomarkers; Tumor progression; Therapy resistance.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000200306

Cytosine methylation of mature microRNAs inhibits their functions and is associated with poor prognosis in glioblastoma multiforme
Provedor de dados: 5
Autores: Cheray, Mathilde; Etcheverry, Amandine; Jacques, Camille; Pacaud, Romain; Bougras-cartron, Gwenola; Aubry, Marc; Denoual, Florent; Peterlongo, Pierre; Nadaradjane, Arulraj; Briand, Josephine; Akcha, Farida; Heymann, Dominique; Vallette, François M.; Mosser, Jean; Ory, Benjamin; Cartron, Pierre-françois.
Background Literature reports that mature microRNA (miRNA) can be methylated at adenosine, guanosine and cytosine. However, the molecular mechanisms involved in cytosine methylation of miRNAs have not yet been fully elucidated. Here we investigated the biological role and underlying mechanism of cytosine methylation in miRNAs in glioblastoma multiforme (GBM). Methods RNA immunoprecipitation with the anti-5methylcytosine (5mC) antibody followed by Array, ELISA, dot blot, incorporation of a radio-labelled methyl group in miRNA, and miRNA bisulfite sequencing were perfomred to detect the cytosine methylation in mature miRNA. Cross-Linking immunoprecipiation qPCR, transfection with methylation/unmethylated mimic miRNA, luciferase promoter reporter plasmid,...
Tipo: Text
Palavras-chave: MiRNA; Cytosine-methylation; Epigenetics; DNMT3A; AGO4; Glioblastoma; Epitranscriptomics.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00610/72196/70980.pdf

Diosmin induces caspase-dependent apoptosis in human glioblastoma cells
Provedor de dados: 42
Autores: SOARES,JULIANA M.; FARIA,BRUNA M. DE; ASCARI,LUCAS M.; ALVES-LEON,SONIZA V.; SOUZA,JORGE M. DE; SOARES,ANTONIO G.; CORDEIRO,YRAIMA; ROMÃO,LUCIANA F.
Abstract: Diosmin is a flavone glycoside clinically used as the main component of Daflon for the treatment of venous diseases. Several studies demonstrated that this natural compound can induce apoptosis in different tumors. However, isolated diosmin has not been studied regarding its effects on glioblastoma so far. Since glioblastoma is a highly lethal and fast-growing brain tumor, new therapeutic strategies are urgently needed. Herein, we evaluated the role of this flavonoid against glioblastoma cells using in vitro assays. Diosmin significantly reduced the viability of GBM95, GBM02, and U87MG glioblastoma cells, but not of healthy human astrocytes, as verified by MTT assay. Vimentin immunostaining showed that diosmin induced morphological changes in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apoptosis; Diosmin; Flavonoid; Glioblastoma.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700701

Galectin-8 promotes migration and proliferation and prevents apoptosis in U87 glioblastoma cells
Provedor de dados: 48
Autores: Metz,Claudia; Döger,Remziye; Riquelme,Elizabeth; Cortés,Priscilla; Holmes,Christopher; Shaughnessy,Ronan; Oyanadel,Claudia; Grabowski,Catalina; González,Alfonso; Soza,Andrea.
BACKGROUND: Glioblastoma is one of the most aggressive cancers of the brain. Malignant traits of glioblastoma cells include elevated migration, proliferation and survival capabilities. Galectins are unconventionally secreted glycan-binding proteins that modulate processes of cell adhesion, migration, proliferation and apoptosis by interacting with beta-galactosides of cell surface glycoproteins and the extracellular matrix. Galectin-8 is one of the galectins highly expressed in glioblastoma cells. It has a unique selectivity for terminally sialylated glycans recently found enhanced in these highly malignant cells. A previous study in glioblastoma cell lines reported that Gal-8 coating a plastic surface stimulates two-dimensional motility. Because in other...
Tipo: Journal article
Palavras-chave: Galectin-8; Glioblastoma; Cancer; Cell cycle; Apoptosis; Proliferation; Migration.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602016000100033

Angiogenic potential of the cerebrospinal fluid (CSF) of patients with high-grade gliomas measured with the chick embryo chorioallantoic membrane assay (CAM)
Provedor de dados: 48
Autores: Sinning,Mariana; Letelier,René; Rosas,Carlos; Fuenzalida,Marcela; Lemus,David.
High-grade gliomas are highly vascularized tumors. Neo-angiogenesis plays a key role in tumor growth and resistance to therapy. A cerebrospinal fluid (CSF) sample could be a useful way to obtain pro-angiogenic predictive or prognostic markers at different stages of the disease. As a first step we looked for pro-angiogenic activity in the CSF of patients with high-grade gliomas. We performed the chicken embryo chorio-allantoic membrane (CAM) assay to study the angiogenic potential of the cerebrospinal fluid (CSF), obtained either by lumbar puncture (LP) or craniotomy from six patients with high-grade brain tumors (three glioblastoma (WHO grade IV), one anaplastic oligodendroglioma (WHO grade III), two anaplastic ganglioglioma (WHO grade III)), and four...
Tipo: Journal article
Palavras-chave: Angiogenesis; Cerebrospinal fluid; Glioblastoma; High-grade glioma.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000200005

Kaurene diterpene induces apoptosis in U87 human malignant glioblastoma cells by suppression of anti-apoptotic signals and activation of cysteine proteases
Provedor de dados: 56
Autores: Lizarte Neto,F.S.; Tirapelli,D.P.C.; Ambrosio,S.R.; Tirapelli,C.R.; Oliveira,F.M.; Novais,P.C.; Peria,F.M.; Oliveira,H.F.; Carlotti Junior,C.G.; Tirapelli,L.F.
Gliomas are the most common and malignant primary brain tumors in humans. Studies have shown that classes of kaurene diterpene have anti-tumor activity related to their ability to induce apoptosis. We investigated the response of the human glioblastoma cell line U87 to treatment with ent-kaur-16-en-19-oic acid (kaurenoic acid, KA). We analyzed cell survival and the induction of apoptosis using flow cytometry and annexin V staining. Additionally, the expression of anti-apoptotic (c-FLIP and miR-21) and apoptotic (Fas, caspase-3 and caspase-8) genes was analyzed by relative quantification (real-time PCR) of mRNA levels in U87 cells that were either untreated or treated with KA (30, 50, or 70 µM) for 24, 48, and 72 h. U87 cells treated with KA demonstrated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Kaurenoic acid; Glioblastoma; MiR-21; C-FLIP; Apoptosis.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000100071

4-Nerolidylcatechol induces autophagy in human glioblastoma cells
Provedor de dados: 60
Autores: Massaro,Renato Ramos; Brohem,Carla Abdo; Almeida,Rebeca Leite de; Rivelli,Diogo Pineda; Miyake,Juliano Andreoli; Colquhoun,Alison; Barros,Silvia Berlanga de Moraes; Maria-Engler,Silvya Stuchi.
ABSTRACT Gliomas account for the majority of primary malignant brain tumors and present invasive behavior into adjacent healthy tissue. While 4-NC had previously shown to induce apoptotic cell death in a melanoma model, for the glioma model described in this paper 4-NC is cytotoxic for the cells with the induction of the autophagic pathway. Trypan blue exclusion assay showed that 4-NC was cytotoxic in a dose-dependent manner for A172 and T98G cell lines. IC10 and IC50 values were at 32 µM and 41 µM for A172 and T98G respectively. Inhibition of cell proliferation was observed by total cell counts and by cell cycle analysis by flow cytometry, with cell cycle arrest of A172 and T98G cell lines respectively in the G1/G0 and S phases of the cell cycle. 4-NC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 4-Nerolidylcatechol; Glioblastoma; Cytotoxicity; Autophagy.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000300618

Synergistic effect of microRNA and albumin-bound nanoparticles for inhibition of glioblastoma cancer cell proliferation
Provedor de dados: 60
Autores: Shariatnasery,Maria; Irani,Shiva; Soleimani,Masoud; Goodarzi,Navid; Dinarvand,Rassoul.
The functional significance of upregulation miR-34a in combination with albumin-bound paclitaxel nanoparticles in U251 glioblastoma cell line has been evaluated. The MTT assay determined that miR-34a and albumin-bound paclitaxel nanoparticles can reduce cell viability, but the combination of both factors has a stronger effect on cell viability. The application of qRT-PCR has demonstrated that the transduction of miR-34a could lead to exogenous upregulation of miR-34a level and downregulation of SURVIVIN. Moreover, treatment of U251 cells with miR-34a and nanoparticles together considerably inhibit SURVIVIN expression compared to miR-34a and nanoparticles alone. Flow cytometry showed that upon miR-34a overexpression cell cycle arrested in G1 phase, while...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: MiR-34a; Glioblastoma; Albumin; Paclitaxel; Nanoparticles; Combination therapy.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100535